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WO2014205677A1 - 接入控制方法和设备 - Google Patents

接入控制方法和设备 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)
French (fr)
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/zh
Publication of WO2014205677A1 publication Critical patent/WO2014205677A1/zh
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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Abstract

本发明提供一种接入控制方法和设备，其中方法包括：获取第一小区中的第一UE与第二接入设备之间的估计上行路损，若所述估计上行路损满足接入条件，则指示所述第一UE接入至第二小区，所述第二小区为所述第二接入设备下的小区；在所述第一UE接入至所述第二小区的情况下，获取所述第一UE与所述第二接入设备之间的实际上行路损；根据所述实际上行路损与所述估计上行路损，对所述接入条件进行校正。本发明更加合理和准确的控制用户设备的接入。

Description

接入控制方法和设备
技术领域 本发明涉及通信技术， 尤其涉及一种接入控制方法和设备。
背景技术
随着 3G在全球范围内的广泛部署， 3G的演进技术一一长期演进 （Long Term Evolution, 简称： LTE) 及其进一步演进 LTE-Advanced获得了广泛研 究。 其中， 异构网络 (Heterogeneous Network, 简称： HetNet ) 是为了追求 更高的数据吞吐量而出现的网络构成方式；该 HetNet中可以包含不同制式的 网络，例如使用全球移动通讯系统（Global System of Mobi le communication, 简称： GSM)的宏小区（Macro cel l )、使用无线保真（Wireless Fidelity, Wi-Fi ) 技术的微小区 （Pico/Femto cel l ) 。 宏小区的覆盖范围相对较大， 主要用于 提供高覆盖率的保障， 微小区的覆盖范围相对较小， 主要用于热点覆盖； 一 种典型的 HetNet场景为宏小区内存在多个微小区。 目前， 随着移动数据流量 的激增，微小区逐渐增多， 尤其是使用 Wi-Fi技术的微小区得到了广泛部署； 可以将宏小区中的至少一个用户设备 （User Equipment , 简称： UE) 转移到 微小区， 以实现对宏小区的数据分流， 缓解宏小区的流量负荷。
然而， 现有技术在异构网络中判断 UE是否移动到某小区的覆盖范围时， 判断的准确性较低， 比如， 宏小区的 UE实际上不在某个微小区的覆盖范围， 但是判断结果却是 UE在该微小区的覆盖范围， 从而指示 UE接入该微小区， 造成接入后的 UE信号质量较差； 或者， 宏小区内的流量负担较大， UE信号 质量不好， 而 UE又在微小区的覆盖范围， 但是由于判断结果是 UE不在微小 区的覆盖范围， 使得不能及时指示 UE接入至微小区， 也不利于 UE信号质量 的提高。 发明内容
本发明提供一种接入控制方法和设备， 目的是提高对于 UE是否在移动到 小区的覆盖范围内的判断准确度， 更加合理和准确的控制用户设备的接入。 第一方面， 提供一种接入控制方法， 所述方法适用于包括第一小区和第 二小区的通信系统， 所述第二小区为第二接入设备下的小区， 包括：
获取接入所述第一小区中的第一用户设备 UE与所述第二接入设备之间 的估计上行路损；
若所述第一 UE与所述第二接入设备之间的估计上行路损满足所述第二 小区的接入条件， 则指示所述第一 UE接入至所述第二小区；
获取所述第一 UE在接入所述第二小区后， 所述第一 UE与所述第二接入 设备之间的实际上行路损；
根据所述第一 UE与所述第二接入设备之间的实际上行路损与所述第一 UE与所述第二接入设备之间的估计上行路损， 对所述第二小区的接入条件进 行校正， 校正后的所述第二小区的接入条件用于控制所述第一小区中的第二 UE接入所述第二小区。
基于第一方面， 在第一种可能实现方式中， 在对所述第二小区的接入条 件进行校正之后， 还包括：
获取所述第二 UE与所述第二接入设备之间的估计上行路损；
若所述第二 UE与所述第二接入设备之间的估计上行路损满足所述校正 后的所述第二小区的接入条件， 则指示所述第二 UE接入至所述第二小区。
基于第一方面或第一方面的第一种可能实现方式中， 在第一方面的第二 种可能实现方式中，所述获取所述第一 UE与所述第二接入设备之间的实际上 行路损， 包括：
接收所述第二接入设备发送的所述第一 UE与所述第二接入设备之间的 实际上行路损； 或者，
获取所述第一 UE的上行传输信号的接收功率和所述上行传输信号的发 射功率； 根据所述接收功率和所述发射功率， 得到所述第一 UE与所述第二接 入设备之间的实际上行路损。
基于第一方面至第一方面的第二种可能实现方式中的任一种实现方式， 在第一方面的第三种可能实现方式中， 所述第二小区的接入条件是： 所述第 一 UE与所述第二接入设备之间的估计上行路损在所述第二小区的覆盖范围 所对应的路损限值的范围内。
基于第一方面至第一方面的第三种可能实现方式中的任一种实现方式， 在第一方面的第四种可能实现方式中，所述校正后的第二小区的接入条件为： 所述第二 UE与所述第二接入设备之间的估计上行路损加上校正值后，小 于路损限值； 或者，
路损限值加上所述校正值后，大于所述第二 UE与所述第二接入设备之间 的估计上行路损；
其中，所述校正值为所述第一 UE与所述第二接入设备之间的实际上行路 损与所述第一 UE与所述第二接入设备之间的估计上行路损的差值。
基于第一方面至第一方面的第四种可能实现方式的任意一种， 在第一方 面的第五种可能实现方式中， 所述第二接入设备与所述第一小区所属的第一 接入设备具有不同的工作频率。
第二方面， 提供一种接入控制设备， 所述接入控制设备属于包括第一小 区和第二小区的通信系统， 所述第二小区为所述第二接入设备下的小区， 包 括：
接入判断单元，用于获取第一用户设备 UE与第二接入设备之间的估计上 行路损， 所述第一 UE为接入所述第一小区的用户设备， 并判断所述估计上行 路损是否满足所述第二小区的接入条件；
接入指示单元， 用于在所述接入判断单元判断出所述估计上行路损满足 所述第二小区的接入条件时， 指示所述第一 UE接入至所述第二小区；
信息获取单元，用于获取所述第一 UE与所述第二接入设备之间的实际上 行路损；
条件校正单元， 用于根据所述实际上行路损与所述估计上行路损， 对所 述接入条件进行校正，校正后的接入条件用于控制第一小区中的第二 UE接入 所述第二小区。
基于第二方面， 在第二方面的第一种可能实现方式中， 所述接入判断单 元， 还用于获取所述第二 UE与所述第二接入设备之间的估计上行路损； 并判 断所述估计上行路损是否满足校正后的接入条件；
所述接入指示单元， 还用于在所述接入判断单元判断出所述估计上行路 损满足校正后的所述第二小区的接入条件时，指示所述第二 UE接入至所述第 二小区。
基于第二方面或第二方面的第一种可能实现方式， 在第二方面的第三种 可能实现方式中， 所述信息获取单元， 具体用于接收所述第二接入设备发送 的所述第一 UE与所述第二接入设备之间的实际上行路损； 或者，
所述信息获取单元， 具体用于获取所述上行传输信号的接收功率和所述 上行传输信号的发射功率； 根据所述接收功率和发射功率， 得到所述第一 UE 与所述第二接入设备之间的实际上行路损。
基于第二方面至第二方面的第三种可能实现方式的任意一种， 在第二方 面的第四种可能实现方式中， 所述第二小区的接入条件是： 所述第一 UE与所 述第二接入设备之间的估计上行路损在所述第二小区的覆盖范围所对应的路 损限值的范围内。
基于第二方面至第二方面的第四种可能实现方式中的任意一种， 在第二 方面的第五种可能实现方式中， 所述第二接入设备与所述第一小区所属的第 一接入设备具有不同的工作频率。
应用本发明实施例提供的接入控制方法和设备，通过获取 UE接入第二小 区之前的估计上行路损以及接入第二小区之后的实际上行路损， 并根据对第 二小区的接入条件进行校正， 能够尽可能的减小两者之间可能由于第一接入 设备和第二接入设备具有不同工作频率而造成的路损差异， 从而使得对于后 续 UE是否在第二小区覆盖范围的判断准确度更高，进而更加合理和准确的控 制用户设备的接入， 减少接入判断的失误。 附图说明 图 1为本发明接入控制方法实施例的应用场景图；
图 2为本发明接入控制方法一实施例的流程示意图；
图 3为本发明接入控制方法另一实施例的信令示意图；
图 4为本发明接入控制方法又一实施例的信令示意图；
图 5为本发明接入控制方法又一实施例的信令示意图；
图 6为本发明接入控制设备一实施例的结构示意图；
图 7为本发明接入控制设备另一实施例的结构示意图；
图 8为本发明实施例提供的接入控制设备的实体结构示意图。 具体实施方式 在 HetNet中，使用微小区对宏小区进行数据分流可以缓解宏小区的流量 负荷。 一种可选的利用微小区进行数据分流的方案是， 当宏小区中的宏基站 负荷较大时， 宏基站可以将用于标识宏小区所服务至少一个 UE的特征信息 (例如上行探测（Sounding)参考信号的时频资源位置、随机接入信道（Random Access Channel , 简称： RACH) 的随机接入前导序列等） 发送给微小区的微 基站， 微基站据此识别到所述至少一个 UE并侦听这些 UE上行传输， 并获取 微基站对 UE上行信号的接收功率和 UE上行信号的发射功率。根据 UE上行信 号的接收功率与 UE上行信号的发射功率可以通过估计算法得到 UE与微小区 之间的上行路损。 由于此时 UE仍接入在宏小区， 还没接入到微小区中， 所以 将这种情况下获得的 UE与微小区之间的上行路损称为估计上行路损。将该估 计上行路损与微小区覆盖范围对应的路损限值进行比较 （该路损限值可以是 微基站对其覆盖范围内的各 UE的上行路损通过统计算法而得到）， 就可以判 断得到该 UE是否在微小区的覆盖范围内 （例如， 若估计上行路损小于路损限 值则表明 UE在微小区的覆盖范围） ， 进而决定是否将该 UE转移到微小区。
本发明实施例中，考虑到当 HetNet中的宏小区与微小区的工作频率不同 时， 上述的估计上行路损是宏小区的工作频率下的得到的路损值， 而上述路 损限值是微小区的工作频率下的路损值； 而不同的工作频率下， 路损值是有 差异的， 例如即使相同的信号传输距离， 当信号以 20赫兹 （Hz ) 和 50Hz的 频率传输时， 分别对应的该距离上的路损是不同的。 所以， 本发明实施例为 了在判断 UE是否在微小区的覆盖范围时，避免将路损值与不在同一工作频率 上的路损门限直接比较而造成判断结果不准确， 提出了一种接入控制方法。
本发明实施例的接入控制方法，适用于 UE从第一小区接入至第二小区的 过程。 其中， 第一小区和第二小区可以是分别属于不同接入设备的小区， 比 如第一接入设备（比如宏基站）服务的小区称为第一小区，第二接入设备（比 如微基站） 服务的小区称为第二小区， 且第一接入设备和第二接入设备的工 作频率可以是不同的； 第一小区和第二小区也为可以属于同一接入设备下的 小区， 这种情况下， 上述第一接入设备与第二接入设备为相同接入设备。
图 1示出了一种可选的适用场景， 图 1为本发明接入控制方法实施例的 应用场景图。该图 1所示的是异构网络 HetNet的一种典型应用场景。在某个 提供广覆盖的宏小区内存在多个提供热点覆盖的微小区， 微基站服务的小区 称为微小区。 其中的宏小区即为第一小区， 微小区即为第二小区。 在后续的 实施例描述中， 也以该图 1所示的场景为例进行说明。 虽然第一小区和第二 小区以图 1所示为例， 但是具体实施中并不局限于图 1所示的场景， 比如服 务第二小区的微基站还可以是无线局域网 （Wireless Local Area Networks , 简称： WLAN) 的接入点 （Access Point , 简称： AP ) 等。
如图 1所示， UE处于宏小区中， 是由宏基站为其提供服务； 当宏小区内 的流量较大， 宏基站的负担较重时， 如果该 UE在微小区的覆盖范围内， 宏基 站可以控制该 UE接入至微小区中， 例如宏基站控制 UE接入至微小区 2， 由 微小区 2分担宏小区内的流量。在该控制过程中， 需要判断 UE是否处于微小 区 2的覆盖范围， 如果判断结果为是， 指示 UE从宏小区接入至微小区 2。 但 是准确判断 UE是否处于微小区的覆盖范围内是 UE能否从宏小区接入至微小 区的前提。
实施例一
图 2为本发明接入控制方法一实施例的流程示意图， 如图 2所示， 该方 法可以包括：
201、获取第一 UE与第二接入设备之间的估计上行路损， 第一 UE为第一 接入设备所在的第一小区中的用户设备；
其中， 以图 1所示的场景为例， 第一小区是宏小区， 第二小区是微小区， 本实施例中， 第一小区由第一接入设备所服务， 该第一接入设备例如是宏小 区中的宏基站； 第二小区由第二接入设备所服务， 该第二接入设备例如是微 小区中的微基站； 所述的第一 UE就是图 1中所示的 UE。 在图 1中， 估计上 行路损， 是当 UE处于宏小区中由宏基站为 UE提供服务时， 估计的 UE与微基 站之间的路损。 例如， UE向宏基站进行上行传输时， UE上行传输的发射功率 由宏基站获取（例如宏基站估计或者 UE向宏基站上报； 其中， 宏基站估计所 述发射功率的方法例如是， 宏基站利用 UE发送的测量报告得到宏基站与 UE 之间的路损值， 并根据该路损值和上行传输的接收功率得到所述发射功率）， 而微基站根据宏基站发送的用于识别该 UE的特征信息识别该 UE， 并侦听该 UE的上行传输获得对应的接收功率， 根据所述的接收功率和发射功率可以估 计出 UE与微基站之间的上行路损。 由于该 UE实际还处于宏小区的服务中， 所以是在宏小区的工作频率上的路损值， 称为估计上行路损。 需要说明的是， 执行本实施例方法的设备， 可以是宏基站、 也可以是微 基站， 或者还可以是宏基站和微基站之外的其他网络实体， 该其他网络实体 例如是集中控制节点。 例如， 如果是宏基站执行， 则本步骤中， 微基站将自 己检测到的所述接收功率传输至宏基站， 由宏基站根据所述接收功率和发射 功率得到估计上行路损； 如果是微基站执行， 则本步骤中是宏基站将发射功 率传输至微基站， 由微基站根据所述接收功率和发射功率得到估计上行路损； 如果是其他网络实体执行， 则本步骤中宏基站和微基站需要将各自得到的所 述接收功率或发射功率传输至该实体， 由该实体得到估计上行路损。
202、 若所述估计上行路损满足第二小区的接入条件， 则指示所述第一 UE接入至所述第二接入设备所在的第二小区；
其中， 所述的微基站所在微小区的覆盖范围对应的路损限值， 是根据该 路损限值限定了微小区的覆盖范围； 该路损限值指的是， 例如， 在微小区内 的各个 UE向微基站进行上行传输时， 通常都会有上行路损， 距离微基站较近 的 UE可能上行路损较小， 而在微小区的覆盖范围边缘的 UE可能上行路损较 大， 如果将该覆盖范围边缘的 UE的上行路损称为路损限值， 那么就是说如果 某个 UE到微基站的上行路损超过了该路损限值， 则表明该 UE实际已经不在 微小区的覆盖范围内， 将不适合由微基站为 UE服务。本实施例将估计上行路 损与所述路损限值比较， 即是在判断 UE是否在微小区的覆盖范围， 以据此决 定是否指示 UE接入至微小区来减轻宏小区的流量负荷。
所述第二小区的接入条件， 例如是 "估计上行路损〈微小区的覆盖范围对 应的路损限值" ， 则将在 201中获得的估计上行路损与所述路损限值比较， 若估计上行路损小于路损限值， 表明满足接入条件， 即表明 UE在微小区的覆 盖范围内， 则指示所述 UE接入至所述微小区； 否则， 表明 UE不在微小区的 覆盖范围， 不指示 UE接入至微小区， 仍由宏小区为 UE服务。 UE从宏小区接 入至微小区的过程可以采用常规技术， 不再详述。
同理， 本步骤也可以是宏基站、 微基站或者其他网络实体执行 （例如， 集中控制节点） ； 如果是由宏基站或者其他网络实体执行时， 则微基站需要 将上述的微小区的覆盖范围对应的路损限值发送给所述宏基站或者其他网络 实体， 该路损限值是微基站可以通过统计算法得到的， 比如， 微基站可以根 据切换到微小区的至少一个 UE的路损根据现有的统计算法得到所述路损限 值。
203、在所述第一 UE接入至所述第二小区后， 获取所述第一 UE与所述第 二接入设备之间的实际上行路损；
其中， 如果本实施例的方法是由微基站执行， 则本步骤中的获取 UE与微 基站之间的实际上行路损， 可以是在 UE接入至微小区之后， 微基站接收 UE 发送的上行传输信号， 并获取所述上行传输信号的接收功率和发射功率， 根 据所述接收功率和发射功率得到所述实际上行路损。 例如， 所述的发射功率 的获取可以是， UE向微基站发送功率控制报告， 该功率控制报告中包含有本 次上行传输的发射功率， 微基站通过该功率控制报告获取所述发射功率。 如 果本实施例的方法是由宏基站或者其他网络实体执行， 则微基站在通过上述 方法获得实际上行路损后， 需要将该实际上行路损发送至所述宏基站或者其 他网络实体。
204、根据所述实际上行路损与所述估计上行路损， 对所述第二小区的接 入条件进行校正，校正后的接入条件用于控制第一小区中的第二 UE接入第二 小区。
其中， 如上所述的估计上行路损， 是在宏小区的工作频率下的路损值， 而所述的实际上行路损， 是 UE接入至微小区之后， 在微小区的工作频率下的 路损值， 因而宏小区频率下的得到的路损值与微小区频率下得到的路损值是 有差异的。正是这种不同频率导致的差值造成了对 UE是否在微小区覆盖范围 的判断不准确， 因此， 本实施例将根据所述差值， 对接入条件进行校正， 该 校正的目的是尽量消除不同频率导致的路损值差异， 使得接入条件尽量趋向 于同一频率下的路损值比较。
以接入条件是所述估计上行路损在所述第二小区的覆盖范围对应的路损 限值的范围内为例， 即 "估计上行路损 （PLes ) 〈微小区的覆盖范围对应的路 损限值 （THWUN ) " ， 假设上述的实际上行路损与估计上行路损之间的差值是 校正值 J， 则表明在宏小区的工作频率下与微小区的工作频率下导致的路损 差异是 J， 为了将接入条件尽量趋向于同一频率下的路损值比较， 可以根据 该 对接入条件进行校正。 例如， 校正值 J是 5dB (即实际上行路损比估计上 行路损大 5 dB ) ， 则上述接入条件校正为 "P +5〈 THWUN" (相当于对估计 上行路损进行校正， 可以认为 PLs+5反映了当 UE工作在微小区的频率下时， UE与微基站之间的上行路损） ， 或者也可以校正为 "P 〈 THWLAN-5 " (相当 于对路损限值进行校正， 可以认为 THWUN_5反映了当 UE工作在宏小区的频率 下时， 微小区的覆盖范围对应的路损限值） ， 实际这两种对接入条件的校正 方式是一致的。
经过上述校正， 随着不断有 UE接入到微小区中， 将逐渐减少不同工作频 率导致的路损差异， 因此， 该校正所采用的校正值 是可以根据实际上行路 损与估计上行路损之间的差值得到的， 而该差值就是由于不同工作频率导致 的； 所以， 采用校正值 对接入条件进行校正， 即为尽可能的将接入条件校 正为同一频率下的路损值比较， 使得判断结果更加准确， 避免造成 UE不在微 小区覆盖范围而判断为在， 或者 UE在微小区覆盖范围而判断为不在的情况， 保证 UE获得较好的信号质量。
需要说明的是， 上述实施例是以根据某个 UE的差值进行校正， 但具体实 施中， 校正值 J的获得所依据的样本值的数量可以是多个。 举例如下： 假设 宏小区内共有 5个 UE接入至微小区， 那么每个 UE在从宏小区接入至微小区 的过程中， 宏基站（以宏基站为执行设备为例）都可以得到该 UE对应的实际 上行路损、估计上行路损， 这里将每个 UE对应的所述实际上行路损和估计上 行路损称为一个样本值； 宏基站共得到了分别与 5个 UE对应的 5个样本值。 需要说明的是， 本实施例的样本值， 指的是接入成功的样本值， 即只有成功 接入至微小区的 UE, 获取其对应的实际上行路损和估计上行路损， 组成样本 值。
对于每个样本值， 宏基站都可以计算所述实际上行路损与所述估计上行 路损之间的差值，共得到与所述 5个样本值分别对应的差值，例如是 J 1、 Δ 2、 Δ 3、 Δ 4和 5。 宏基站根据这些差值， 可以利用统计方法处理， 得到校正值 Δ， 例如， zl = d 1+Δ 2^Δ 3+Δ 4+Δ 5) /5, 即校正值 zl可以是上述 5个差值的 平均值。 当然， 本实施例并不限制校正值 必须是平均值， 具体实施中也可 以采用其他统计处理方法得到 ，得到该校正值 的目的是通过利用该 J进行 校正尽可能的使得后续样本值的差值尽可能的小。
此外， 样本值的预设数量也是可以根据实际情况进行设定的， 比如可以 每隔 10个 UE进行一次校正，即每当有宏小区内的 10个 UE接入至微小区时， 将以这 10个 UE的样本值进行统计处理得到校正值 进行校正， 比如， UE1、 UE2、 UE3…… . . UE20这 20个 UE接入微小区， 可以是以 UE1至 UE10这 10个 样本进行一次校正， 以 UE11至 UE20这 10个样本进行一次校正。 或者， 也可 以按照时间间隔设定校正频率， 比如每隔 30分钟进行一次校正， 那么不论这 30分钟内有多少数量的 UE进行了接入， 宏基站也仅以时间为频率进行校正。 通过不断的进行校正， 可以不断的提高接入判断的准确度。
此外， 在对第二小区的接入条件进行校正后， 宏基站后续将根据校正后 的第二小区的接入条件，来判断宏小区中的第二 UE是否在微小区的覆盖范围 内， 进而据此决定是否指示第二 UE接入至微小区； 该第二 UE指的是， 例如 第一 UE之外的另一个 UE, 或者需要再次进入微小区的第一 UE等。
例如， 在对接入条件进行校正后， 宏基站可以获取第一接入设备所在的 第一小区中的第二 UE与第二接入设备之间的估计上行路损；若所述估计上行 路损满足所述校正后的接入条件，则指示所述第二 UE接入至所述第二接入设 备所在的第二小区。
本发明实施例以 UE在宏小区中， 由宏基站控制 UE接入微小区的情况为 例， 但本领域技术人员可以理解， 类似地， 在 UE接入到微小区中的情况， 微 基站也需要准确判断 UE是否在宏小区的覆盖范围内， 如果 UE在宏小区的覆 盖范围内， 则微基站可以控制 UE切换到宏小区中， 这种情况下的估计上行路 损为在微小区工作频率下得到的路损值。
本实施例的接入控制方法， 不仅可以用于第一接入设备与第二接入设备 具有相同工作的频率的场景下， 更进一步地， 通过获取 UE接入第二小区之前 的估计上行路损以及接入第二小区之后的实际上行路损， 并根据两者的差值 对接入条件进行校正， 能够尽可能的减小两者由不同工作频率造成的差异， 使得对于 UE是否在微小区覆盖范围的判断准确度更高，进而更加合理和准确 的控制用户设备的接入， 减少接入判断的失误， 提高 UE的信号质量。
如上所述的， 本发明实施例的接入控制方法， 其执行设备可以是宏基站、 微基站或者其他网络实体， 下面将分别描述不同的执行设备执行该接入控制 方法的流程：
实施例二
图 3为本发明接入控制方法另一实施例的信令示意图， 本实施例中， 第 一接入设备以宏基站为例， 第二接入设备以微基站为例， 本实施例是由宏基 站执行 UE的接入判断以及接入条件的校正。如图 3所示，可以包括如下步骤， 但需要说明的是， 本实施例并不限制各步骤的执行顺序：
301、 宏基站配置 UE的上行传输；
其中， 此时的 UE处于宏小区中， 由宏基站为其提供服务。 宏基站配置上 行传输的配置信息中， 包含能够标识 UE的特征信息 （例如， Sounding信号 的时频资源位置、 序列的循环移位等； RACH的时频资源位置、 随机接入前导 序列等） 。
302、 宏基站向微基站发送用于标识 UE的特征信息；
例如， 宏基站可以将上述的 Sounding信号的时频资源位置等特征信息， 发送至微基站， 以使得微基站能够据此识别 UE。
303、 UE根据配置信息向宏基站进行上行传输；
304、 宏基站获取 UE上行传输的发射功率；
例如， 该发射功率可以是 UE上报给宏基站的， 或者也可以是宏基站自己 估计得到的。
305、 微基站侦听 UE的上行传输获取 UE上行传输信号的接收功率； 其中， 微基站可以根据 302中接收的 UE的特征信息， 识别该 UE, 并侦 听 UE的此次上行传输， 检测微基站对该次传输的接收功率。如果微小区和宏 小区是异系统， 即是不同制式的网络， 使用的是不同的工作频率， 则可以在 微小区中增加一个与宏小区相同制式的上行接收机， 微基站通过该上行接收 机可以侦听 UE的上行传输。
306、 微基站将获取的接收功率发送给宏基站；
307、 宏基站获取宏小区中的 UE与微基站之间的估计上行路损， 并判断 UE是否在微小区的覆盖范围；
其中， 宏基站根据其自己获取的发射功率、 以及从微基站接收的接收功 率， 估计出 UE与微基站之间的上行路损， 称为估计上行路损。 并且， 宏基站 将该估计上行路损与微基站所在微小区的覆盖范围对应的路损限值进行比 较， 判断是否满足接入条件。 具体如何进行比较、 以及接入条件的设定可以 参见实施例一所述， 在此不再详述。
如果判断结果是满足接入条件， 则表明 UE在微小区的覆盖范围， 在执行 完 307之后接着执行 308; 否则， 表明 UE不在微小区的覆盖范围， UE需要继 续留在宏小区， 宏基站不执行 308， 本次流程结束。
308、 宏基站指示 UE接入至微小区；
309、 UE根据宏基站的指示， 接入到微基站；
310、 微基站获取所述 UE与所述微基站之间的实际上行路损；
其中， 在 UE接入至微小区之后， 由微基站为 UE服务， UE会向微基站进 行上行传输。 此时， 微基站接收所述 UE发送的上行传输信号， 并获取所述上 行传输信号的接收功率和发射功率，其中的发射功率例如可以是 UE上报至微 基站的。 微基站根据所获取的接收功率和发射功率， 得到实际上行路损， 例 如， 实际上行路损 =发射功率减去接收功率。
311、 微基站将实际上行路损发送给宏基站；
312、宏基站根据实际上行路损与估计上行路损之间的差值， 对接入条件 进行校正；
其中， 宏基站具体如何对接入条件进行校正可以参见实施例一； 例如， 宏基站可以等到存储预设数量的样本值之后再进行校正： 比如， 宏小区中的 某个 UE接入至微小区， 宏基站在此过程中获得了该 UE对应的样本值， 标记 为样本值 a， 该样本值 a包括该 UE对应的实际上行路损与估计上行路损， 但 是宏基站此时可以不立即进行差值计算等统计处理， 可以暂时存储该样本值 a。 等到宏小区内又有足够数量的 UE接入至了微小区， 宏基站存储的样本值 到达了预设数量时， 宏基站再开始进行校正处理； 比如， 计算每个样本值对 应的差值， 并进行统计处理得到校正值。
313、 宏基站根据校正后的接入条件控制 UE的接入。
其中， 宏基站在对接入条件进行校正后， 在后续的 UE接入判断中将根据 校正后的接入条件进行判断。 例如， 假设接入条件校正为 "P +5〈 THWL™" ， 则假设又有一个 UE要进行接入判断，判断该 UE是否位于微小区的覆盖范围， 则对获得的该 UE对应的 P ^P THWLAN， 将按照上述 " P +5〈 THWLAN " 的条件进 行判断， 这样相对于校正前的条件， 由于已经减小了不同频率造成的路损差 异， 判断的结果也将更加准确。
实施例三
图 4为本发明接入控制方法又一实施例的信令示意图， 本实施例中， 是 由微基站执行 UE的接入判断以及接入条件的校正。 如图 4所示， 包括： 401、 宏基站配置 UE的上行传输；
402、 宏基站向微基站发送 UE的特征信息；
403、 UE根据配置信息向宏基站进行上行传输；
404、 宏基站获取 UE上行传输的发射功率；
405、 微基站侦听 UE的上行传输获取接收功率；
406、 宏基站将获取的发射功率发送给微基站；
407、 微基站获取宏小区中的 UE与微基站之间的估计上行路损， 并根据 估计上行路损判断 UE是否在微小区的覆盖范围；
其中， 微基站根据其自己获取的接收功率、 以及从宏基站接收的发射功 率， 估计出 UE与微基站之间的上行路损， 称为估计上行路损。 判断 UE是否 在微小区的覆盖范围的方式与宏基站的判断方式相同， 不再详述。
如果判断结果是满足接入条件， 则表明 UE在微小区的覆盖范围， 执行完 407之后接着执行 409; 否则， 表明 UE不在微小区的覆盖范围， UE需要继续 留在宏小区， 继续执行 408， 本次流程结束。
408、 微基站通知宏基站， UE不需要接入；
其中， 宏基站得到该通知后， 便得知 UE不在微小区的覆盖范围， 需要继 续留在宏小区， 则宏基站不需要再执行其他步骤。
需要说明的是， 本步骤中的通知所采用的方式可以灵活设置， 比如， 微 基站向宏基站返回的信息， 可以是表示 " UE不接入" 的信息 （例如， " 0 " 表示接入， " 1 "表示不接入， 微基站向宏基站发送 " 1 " ) ； 或者， 也可以 是表示 "UE不在微小区的覆盖范围"的信息（例如， " 00 "表示在覆盖范围， " 01 "表示不在覆盖范围， 微基站向宏基站发送 " 01 " ) ， 宏基站根据该信 息可以确定不需要 UE接入。
409、 微基站通知宏基站指示 UE接入；
其中， 本步骤中的通知所采用的方式也是灵活多样的， 可以参见 408中 所述， 不再详述。
410、 宏基站指示 UE接入至微小区；
其中， 宏基站在接收到微基站的通知后， 将指示 UE接入至微小区。
411、 UE根据宏基站的指示， 接入到微基站；
412、 微基站获取所述 UE与所述微基站之间的实际上行路损； 413、微基站根据实际上行路损与估计上行路损之间的差值， 对接入条件 进行校正；
其中的校正方法可以参见实施例一所述。
414、 微基站根据校正后的接入条件控制 UE的接入。
实施例四
图 5为本发明接入控制方法又一实施例的信令示意图， 本实施例中， 是 由宏基站和微基站之外的其他网络实体执行 UE的接入判断以及接入条件的 校正， 可以将该网络实体称为第三网络实体， 该第三网络实体例如是集中控 制节点。 如图 5所示， 包括：
501、 宏基站配置 UE的上行传输；
502、 宏基站向微基站发送 UE的特征信息；
503、 UE根据配置信息向宏基站进行上行传输；
504、 宏基站获取 UE上行传输的发射功率；
505、 微基站侦听 UE的上行传输获取接收功率；
506、 微基站将接收功率上报至第三网络实体；
507、 宏基站将获取的发射功率上报至第三网络实体；
508、 第三网络实体获取宏小区中的 UE与微基站之间的估计上行路损， 并判断 UE是否在微小区的覆盖范围；
如果判断结果是满足接入条件， 则表明 UE在微小区的覆盖范围， 跳过 509， 继续执行 510; 否则， 表明 UE不在微小区的覆盖范围， UE需要继续留 在宏小区， 继续执行 509， 本次流程结束。
509、 第三网络实体通知宏基站， UE不需要接入；
其中， 第三网络实体通知宏基站的信息内容， 可以参见实施例三， 不再 详述。
510、 第三网络实体通知宏基站指示 UE接入；
511、 宏基站指示 UE接入至微小区；
512、 UE根据宏基站的指示， 接入到微基站；
513、 微基站获取所述 UE与所述微基站之间的实际上行路损；
514、 微基站将实际上行路损上报至第三网络实体；
515、第三网络实体根据实际上行路损与估计上行路损之间的差值， 对第 二小区的接入条件进行校正；
516、 第三网络实体根据校正后的第二小区的接入条件控制 UE的接入。 实施例五
本实施例提供接入控制设备， 该设备可以执行本发明任意方法实施例一 至四的接入控制方法。 该接入控制设备例如可以是宏基站、 微基站或者其他 网络实体， 例如集中控制节点等。
图 6为本发明接入控制设备一实施例的结构示意图， 如图 6所示， 该设 备可以包括： 接入判断单元 61、 接入指示单元 62、 信息获取单元 63和条件 校正单元 64; 其中，
接入判断单元 61， 用于获取第一 UE与第二接入设备之间的估计上行路 损， 第一 UE为第一接入设备所在的第一小区的用户设备， 并判断所述估计上 行路损是否满足第二小区的接入条件；
接入指示单元 62， 用于在所述接入判断单元判断出所述估计上行路损满 足第二小区的接入条件时，指示所述第一 UE接入至所述第二接入设备所在的 第二小区；
信息获取单元 63， 用于在所述第一 UE接入至所述第二小区， 获取所述 第一 UE与所述第二接入设备之间的实际上行路损；
条件校正单元 64， 用于根据所述实际上行路损与所述估计上行路损， 对 所述第二小区的接入条件进行校正， 用于根据校正后的接入条件控制第一小 区中的第二 UE接入所述第二小区。
例如， 所述第一接入设备和第二接入设备的工作频率不同。
进一步的， 所述接入判断单元 61， 还用于获取第一接入设备所在的第一 小区中的第二 UE与第二接入设备之间的估计上行路损；并判断所述估计上行 路损是否满足校正后的第二小区的接入条件。
接入指示单元 62， 还用于在所述接入判断单元判断出所述估计上行路损 满足所述校正后的第二小区的接入条件时，指示所述第二 UE接入至所述第二 接入设备所在的第二小区。
可选的， 信息获取单元 63， 具体用于接收所述第二接入设备发送的所述 实际上行路损，所述实际上行路损是所述第二接入设备在所述 UE接入至所述 第二小区之后得到的。 可选的， 信息获取单元 63， 具体用于获取上行传输信号的接收功率和所 述上行传输信号的发射功率； 根据所述接收功率和发射功率， 得到所述实际 上行路损。
图 7为本发明接入控制设备另一实施例的结构示意图， 如图 7所示， 条 件校正单元 64， 可以包括： 存储子单元 641、 统计子单元 642和校正子单元 643； 其中，
存储子单元 641， 用于存储预设数量的样本值， 每个所述样本值对应一 个从所述第一小区接入至所述第二小区的 UE, 所述样本值包括： 所述 UE的 所述实际上行路损、 与所述估计上行路损；
统计子单元 642， 用于对于每个所述样本值， 计算所述实际上行路损与 所述估计上行路损之间的差值， 得到分别与所述预设数量的样本值对应的预 设数量的差值； 并根据所述预设数量的差值， 得到用于对所述接入条件进行 校正的校正值；
校正子单元 643， 用于利用所述校正值对所述接入条件进行校正。
所述接入判断单元 61判断所依据的所述接入条件是：所述估计上行路损 在所述第二小区的覆盖范围对应的路损限值的范围内。 可选的， 所述条件校 正单元 64，具体用于对所述接入条件中的所述估计上行路损进行校正；或者， 对所述接入条件中的第二小区的覆盖范围对应的路损限值进行校正。
本实施例的接入控制设备，通过设置接入判断单元来获取 UE接入之前的 估计上行路损以及接入之后的实际上行路损， 并由条件校正单元根据两者的 差值对接入条件进行校正等处理， 能够尽可能的减小两者由不同接入设备具 有不同工作频率造成的差异，使得对于 UE是否在微小区覆盖范围的判断准确 度更高， 进而更加合理和准确的控制用户设备的接入， 减少接入判断的失误， 提高 UE的信号质量。
实施例六
图 8为本发明实施例提供的接入控制设备的实体结构示意图， 用于实现 如本发明任意方法实施例一至四所述的接入控制方法， 其工作原理可以参见 前述方法实施例。
如图 8所示， 该接入控制设备可以包括： 存储器 801、 处理器 802、 总线 803和通信接口 804。处理器 802和存储器 801和通信接口 804之间通过总线 803连接并完成相互间的通信。 处理器 802可能为单核或多核中央处理单元
(central processing unit ,简称： CPU) ,或者为特定集成电路（appl ication specific integrated circuit , 简称： ASIC ) ， 或者为被配置成实施本发明 实施例的一个或多个集成电路。 存储器 801可以为高速 RAM存储器， 也可以 为非易失性存储器 （non-volati le memory) ， 例如至少一个磁盘存储器。
其中， 所述通信接口 804用于与外部设备进行通信， 获取第一接入设备 所在的第一小区中的第一 UE与第二接入设备之间的估计上行路损。
所述存储器 801存储应用程序； 所述处理器 802调用所述存储器 801中 存储的应用程序， 判断所述估计上行路损是否满足接入条件； 在判断出所述 估计上行路损满足第二小区的接入条件时，指示所述第一 UE接入至所述第二 接入设备所在的第二小区； 在所述第一 UE接入至所述第二小区的情况下， 通 过通信接口 804获取所述第一 UE与所述第二接入设备之间的实际上行路损； 根据所述实际上行路损与所述估计上行路损， 对所述接入条件进行校正， 用 于根据校正后的接入条件控制第一小区中的第二 UE接入所述第二小区。
进一步的， 处理器 802还用于获取第一接入设备所在的第一小区中的第 二 UE与第二接入设备之间的估计上行路损；并判断所述估计上行路损是否满 足校正后的接入条件； 在所述估计上行路损满足所述校正后的接入条件时， 指示所述第二 UE接入至所述第二接入设备所在的第二小区。
进一步的， 处理器 802具体用于通过通信接口 804接收所述第二接入设 备发送的所述实际上行路损， 所述实际上行路损是所述第二接入设备在所述 UE接入至所述第二小区之后得到的。
进一步的，处理器 802具体用于通过通信接口 804接收所述 UE发送的上 行传输信号， 并获取所述上行传输信号的接收功率和所述上行传输信号的发 射功率； 根据所述接收功率和发射功率， 得到所述实际上行路损。
本发明实施例中的接入控制设备， 可以是第一接入设备、 第二接入设备 或其他网络实体， 可参见方法实施例的具体描述， 这里不再赘述。
应用本实施例的接入控制设备， 能够尽可能的减小由不同接入设备具有 不同工作频率造成的差异，使得对于 UE是否在移动到某小区覆盖范围的判断 准确度更高， 进而更加合理和准确的控制用户设备的接入， 减少接入判断的 失误， 并提高 UE的信号质量。 本领域普通技术人员可以理解： 实现上述各方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算机可 读取存储介质中。 该程序在执行时， 执行包括上述各方法实施例的步骤； 而 前述的存储介质包括： R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的 介质。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种接入控制方法， 其特征在于， 所述方法适用于包括第一小区和第 二小区的通信系统， 所述第二小区为第二接入设备下的小区， 包括：
获取接入所述第一小区中的第一用户设备 UE与所述第二接入设备之间 的估计上行路损；
若所述第一 UE与所述第二接入设备之间的估计上行路损满足所述第二 小区的接入条件， 则指示所述第一 UE接入至所述第二小区；
获取所述第一 UE在接入所述第二小区后， 所述第一 UE与所述第二接入 设备之间的实际上行路损；
根据所述第一 UE与所述第二接入设备之间的实际上行路损与所述第一
UE与所述第二接入设备之间的估计上行路损， 对所述第二小区的接入条件进 行校正， 校正后的所述第二小区的接入条件用于控制所述第一小区中的第二 UE接入所述第二小区。
2、 根据权利要求 1所述的方法， 其特征在于， 在对所述第二小区的接入 条件进行校正之后， 还包括：
获取所述第二 UE与所述第二接入设备之间的估计上行路损；
若所述第二 UE与所述第二接入设备之间的估计上行路损满足所述校正 后的所述第二小区的接入条件， 则指示所述第二 UE接入至所述第二小区。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述获取所述第一 UE与所述第二接入设备之间的实际上行路损， 包括：
接收所述第二接入设备发送的所述第一 UE与所述第二接入设备之间的 实际上行路损； 或者，
获取所述第一 UE的上行传输信号的接收功率和所述上行传输信号的发 射功率； 根据所述接收功率和所述发射功率， 得到所述第一 UE与所述第二接 入设备之间的实际上行路损。
4、 根据权利要求 1-3任意一项所述的方法， 其特征在于， 所述第二小区 的接入条件是：所述第一 UE与所述第二接入设备之间的估计上行路损在所述 第二小区的覆盖范围所对应的路损限值的范围内。
5、 根据权利要求 1-4任意一项所述的方法， 其特征在于， 所述校正后的 第二小区的接入条件为： 所述第二 UE与所述第二接入设备之间的估计上行路损加上校正值后，小 于路损限值； 或者，
路损限值加上所述校正值后，大于所述第二 UE与所述第二接入设备之间 的估计上行路损；
其中，所述校正值为所述第一 UE与所述第二接入设备之间的实际上行路 损与所述第一 UE与所述第二接入设备之间的估计上行路损的差值。
6、 根据权利要求 1-5任一所述的方法， 其特征在于， 所述第二接入设备 与所述第一小区所属的第一接入设备具有不同的工作频率。
7、 一种接入控制设备， 其特征在于， 所述接入控制设备属于包括第一小 区和第二小区的通信系统， 所述第二小区为所述第二接入设备下的小区， 包 括：
接入判断单元，用于获取第一用户设备 UE与第二接入设备之间的估计上 行路损， 所述第一 UE为接入所述第一小区的用户设备， 并判断所述估计上行 路损是否满足所述第二小区的接入条件；
接入指示单元， 用于在所述接入判断单元判断出所述估计上行路损满足 所述第二小区的接入条件时， 指示所述第一 UE接入至所述第二小区；
信息获取单元，用于获取所述第一 UE与所述第二接入设备之间的实际上 行路损；
条件校正单元， 用于根据所述实际上行路损与所述估计上行路损， 对所 述接入条件进行校正，校正后的接入条件用于控制第一小区中的第二 UE接入 所述第二小区。
8、 根据权利要求 7所述的设备， 其特征在于，
所述接入判断单元，还用于获取所述第二 UE与所述第二接入设备之间的 估计上行路损； 并判断所述估计上行路损是否满足校正后的接入条件；
所述接入指示单元， 还用于在所述接入判断单元判断出所述估计上行路 损满足校正后的所述第二小区的接入条件时，指示所述第二 UE接入至所述第 二小区。
9、 根据权利要求 7或 8所述的设备， 其特征在于，
所述信息获取单元， 具体用于接收所述第二接入设备发送的所述第一 UE 与所述第二接入设备之间的实际上行路损； 或者， 所述信息获取单元， 具体用于获取所述上行传输信号的接收功率和所述 上行传输信号的发射功率； 根据所述接收功率和发射功率， 得到所述第一 UE 与所述第二接入设备之间的实际上行路损。
10、 根据权利要求 7-9任意一项所述的设备， 其特征在于，
所述第二小区的接入条件是：所述第一 UE与所述第二接入设备之间的估 计上行路损在所述第二小区的覆盖范围所对应的路损限值的范围内。
11、 根据权利要求 7-10任一所述的设备， 其特征在于， 所述第二接入设 备与所述第一小区所属的第一接入设备具有不同的工作频率。
PCT/CN2013/078007 2013-06-26 2013-06-26 接入控制方法和设备 Ceased WO2014205677A1 (zh)

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