WO2018130153A1

WO2018130153A1 - Cell handover method, terminal, and base station

Info

Publication number: WO2018130153A1
Application number: PCT/CN2018/072060
Authority: WO
Inventors: 孙立新; 丁颖哲; 周明宇; 路杨
Original assignee: 北京佰才邦技术有限公司
Priority date: 2017-01-11
Filing date: 2018-01-10
Publication date: 2018-07-19
Also published as: CN108307460A

Abstract

Provided in the present disclosure are a cell handover method, a terminal, and a base station. The cell handover method comprises: a terminal of a first cell acquires information of at least one second cell via a base station of the first cell, each second cell being an adjacent cell of the first cell and belonging to a base station different from that of the first cell; the terminal determines, on the basis of the information, a channel occupancy or a channel occupancy comparison result of the at least one second cell; the terminal selects one second cell as a target cell on the basis of the channel occupancy or of the channel occupancy comparison result; and the terminal launches a cell access request with respect to the target cell.

Description

Cell handover method, terminal and base station

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710017876.0, filed on Jan. 11,,,,,,,,,,

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a cell handover method, a terminal, and a base station.

Background technique

MulteFire (MF) is a wireless access technology that extends LTE (Long Term Evolution) to unlicensed bands. In this technique, carriers of an unlicensed band can independently provide services without using a carrier of a licensed band. The MF physical layer introduces a WiFi-like carrier sense to interfere with other interference between other unlicensed band working devices (such as Wireless Fidelity (WiFi) devices) that occupy unlicensed band channels and avoid devices operating in unlicensed bands. The technology of LBT (Listen Before Talk) mechanism. When the base station or terminal under the LBT mechanism monitors that the unlicensed band channel is occupied, that is, when the LBT fails, the signal is stopped; when the channel is idle, that is, the LBT succeeds, the signal is sent.

In order to improve the transmission efficiency of the downlink common control signal of the base station under the LBT mechanism, MulteFire introduces a Discovery Reference Signal (DRS). The DRS includes major downlink common control signals, such as system broadcast, primary synchronization signal (PSS, Primary Sync Signal), secondary synchronization signal (SSS, Secondary Sync Signal), enhanced primary synchronization signal (ePSS, enhanced primary Sync Signal), Enhanced Secondary Sync Signal (eSSS), Cell Reference Signal (CRS), Master Information Block (MIB), and Enhanced System Information Block (SIB-MF, System Information Block) Multefire). The DRS occupies 12 or 14 symbols (Symbols) in one downlink subframe. The User Equipment can receive the DRS in the Discovery Signals Measurement Timing Configuration (DMTC) window for downlink synchronization, receiving MIB, and SIB-MF. The MF cell transmits the CRS only in the DRS subframe or other subframes that are transmitted by the Physical Downlink Shared Channel (PDSCH). Therefore, the UE can perform channel measurement on the MF serving cell or the MF neighboring cell only in the DMTC window. Perform cell selection, cell reselection or handover. The base station may separately send the DMTC information of the serving cell, the intra-frequency neighboring cell, and the inter-frequency neighboring cell to the UE.

Due to the LBT mechanism of the Multefire system, when the UE initiates random access to the target cell to access the target cell, if the channel occupancy rate of the target cell side is high, the target cell needs to continuously listen to the channel and wait for the LBT to succeed before sending the message to the UE. Random access response, which will increase the handover delay, thereby increasing the terminal handover failure rate. After the handover fails, the terminal can only interrupt the service until the cell is reselected, and the related technology cannot solve the problem that the terminal handover failure rate is high due to the high channel occupancy rate of the target cell.

Summary of the invention

In a first aspect, an embodiment of the present disclosure provides a cell handover method applied to a terminal, where the terminal accesses a first cell, where the method includes: acquiring, by a base station of the first cell, at least one second cell. a first information, where each second cell is a neighboring cell of the first cell and belongs to a different base station from the first cell; and determining, according to the first information, a channel occupation of the at least one second cell Rate or channel occupancy comparison result; selecting one of the at least one second cell as the target cell according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell; and initiating for the target cell Cell access request.

In a second aspect, an embodiment of the present disclosure provides a cell handover method applied to a base station of a first cell, where the method includes: transmitting, to a terminal accessing the first cell, first information of at least one second cell, where And determining, by the terminal, the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell according to the first information, and selecting, according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell, A second cell serves as a target cell to be accessed.

In a third aspect, an embodiment of the present disclosure provides a terminal. The terminal accesses the first cell and includes: a memory for storing a software program; the processor running the software program to control the terminal to perform according to the first aspect described above Methods.

In a fourth aspect, an embodiment of the present disclosure provides a base station having a first cell and including a memory and a processor; wherein the memory is for storing a software program; the processor is configured to run the software program To control the base station to perform the method described in the second aspect above.

In a fifth aspect, an embodiment of the present disclosure provides a terminal, where the terminal accesses a first cell, and includes: an acquiring module, configured to acquire, by using a base station of the first cell, first information of at least one second cell Each of the second cells is a neighboring cell of the first cell and belongs to a different base station, and the determining module is configured to determine, according to the first information, the at least one second cell. a channel occupancy rate or a channel occupancy ratio comparison result; the selecting module is configured to select a second cell as the target cell according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell; and the access module is It is configured to initiate a cell access request for the target cell.

In a sixth aspect, an embodiment of the present disclosure provides a base station, where the base station has a first cell and includes: a sending module, configured to send first information of at least one second cell to a terminal accessing the first cell And determining, by the terminal, the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell according to the first information, and selecting, according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell, One of the at least one second cell serves as a target cell to be accessed.

DRAWINGS

FIG. 1 is a schematic flowchart of a cell handover method applied to a terminal according to the present disclosure;

2 is a schematic flowchart of a cell handover method applied to a base station according to the present disclosure;

3-5 are schematic flowcharts of an example of a cell handover method provided by the present disclosure in an actual application;

FIG. 6 is a schematic structural diagram of a terminal provided by the present disclosure;

FIG. 7 is a schematic structural diagram of a base station provided by the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal provided by the present disclosure;

FIG. 9 is a schematic structural diagram of a base station provided by the present disclosure.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments.

The present disclosure proposes a scheme for performing cell handover according to cell channel occupancy.

In one aspect, an embodiment of the present disclosure provides a cell handover method applied to a terminal, where the terminal accesses a first cell. As shown in FIG. 1, the cell handover method includes steps S11 to S14.

Step S11: The terminal acquires first information of at least one second cell by using the base station of the first cell, where each second cell is a neighboring cell of the first cell and belongs to a different base station from the first cell.

Step S12: The terminal determines, according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell.

The channel occupancy rate is used to reflect the busy condition of the channel in the cell, and may be specifically defined as the ratio of the channel busy time to the total time, or may be defined as the ratio of the time occupied by the cell to the total time. The ratio of the time occupied by the cell to the total time may be calculated as the probability that the LBT succeeds when the downlink data is sent, and the probability of the LBT success when the downlink data is sent may be calculated as the channel occupancy detection for transmitting the data within the set time. The ratio of the number of successes to the total number of times of channel occupancy detection, or the ratio of the number of successful channel occupancy detections to the total number of channel occupancy detections during the set time period when idle. In addition, the channel occupancy detection of the second cell is performed by the base station of the second cell, and may be a Clear Channel Assessment (CCA) or other channel detection (such as initial CCA, or extended CCA). If the channel occupancy detection succeeds, it may refer to the success of one CCA, and may also refer to the success of multiple consecutive CCA detections. In addition, as an exemplary introduction, the channel occupancy rate may be defined as the average received signal strength (RSS) detected by the cell base station during the set time when idle, or the detected RSS exceeds the specified time within the set time. The ratio of the thresholds, for example, when the RSS of the N subframes is detected within the T subframes exceeds a specified threshold, the channel occupancy rate is N/T, where N and T are both positive integers.

Step S13: The terminal selects one second cell of the at least one second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell.

Step S14: The terminal initiates a cell access request for the target cell.

It is obvious that the handover method of the embodiment of the present disclosure enables the terminal to select a neighbor cell with a lower channel occupancy rate to perform handover, thereby improving the success rate of the cell handover of the terminal and avoiding the delay caused by the handover failure. For the user experience, it has important improvements.

Specifically, the acquiring, by the base station in the foregoing step S11, the first information of the at least one second cell by using the base station of the first cell includes at least one of (i) and (ii): (i) the terminal from the first cell Acquiring the first information in a dedicated radio resource control RRC message sent by the base station; and (ii) acquiring, by the terminal, the first information from a public system broadcast message (for example, SIB3 and/or SIB5) sent by the base station of the first cell .

In practical applications, the terminal may initiate a measurement report only for a part of the second cell (the second cell that satisfies certain conditions). The measurement report carries a flag of a part of the second cell, and the base station of the first cell can selectively feed back only the first information of the second cell with the flag according to the measurement report.

In addition, it should be noted that the first information of the embodiment of the present disclosure is used to determine a channel occupancy rate or a channel occupancy ratio comparison result of the second cell, and may directly be a channel occupancy rate or a channel occupancy ratio comparison result of the second cell, and It may be information for indirectly determining the channel occupancy rate or channel occupancy comparison result of the second cell.

As an exemplary introduction, if the first information of the embodiment of the present disclosure is the channel occupancy rate of the at least one second cell, the channel occupancy rate may be encapsulated in an RRC reconfiguration message, that is, the terminal sends the information from the base station of the first cell. Obtaining a channel occupancy rate of at least one second cell in the RRC reconfiguration message.

As an exemplary introduction, if the first information of the embodiment of the present disclosure is information for indirectly determining a channel occupancy rate or a channel occupancy ratio comparison result of the second cell, the first information of the embodiment of the present disclosure may include each second The measurement configuration information of the cell, where the measurement configuration information includes a measurement object configuration and a measurement report configuration, and the terminal obtains a measurement report configuration for the second cell from the measurement configuration information of the second cell, where the measurement report configuration includes the discovery of the second cell The signal measurement time configures the DMTC information.

In the related art, when the base station of the second cell detects that the channel occupancy rate is low, more idle subframes are generated in the DMTC time window, and the discovery reference signal DRS is transmitted by using the idle subframe. When the channel occupancy rate is high, it is more difficult to transmit the DRS using the idle subframe.

The terminal obtains DMTC information of the second cell in a manner of at least one of (i) and (ii): (i) measurement configuration information in a public system broadcast message SIB3 or an RRC reconfiguration message transmitted by the first cell base station Obtaining DMTC information of the second cell that is in the same frequency as the first cell; and (ii) acquiring, by the public system broadcast message SIB5 or the RRC reconfiguration message, the DMTC information of the at least one second cell that is different from the first cell. The DMTC information of the second cell includes at least one of (i), (ii), and (iii): (i) whether there is indication information of the second cell asynchronous to the first cell, (ii) and the first The DMTC parameter of the second cell synchronized by the cell, and (iii) the DMTC parameter of the second cell asynchronous to the first cell. The DMTC parameters include at least one of a DMTC window duration (dmtc-duration), a DMTC window period (dmtc-Periodicity), and a subframe offset (dmtc-Offset). The DMTC information can be used to determine the location of the DMTC window.

If the measurement configuration information of the second cell sent by the first cell base station does not include the DMTC information, the terminal may further obtain the DMTC information of the second cell by reading the public system broadcast message (for example, SIB-MF) of the second cell. .

Optionally, the DMTC information of the second cell of the embodiment of the present disclosure is encapsulated in the measurement configuration information of the RRC reconfiguration message, that is, the terminal acquires the following from the measurement configuration information of the RRC reconfiguration message sent by the base station of the first cell (i) And (ii) at least one of: (i) DMTC information of a second cell having the same frequency as the first cell, and (ii) at least one DMTC information of the second cell that is different from the first cell.

After determining, by the terminal, the DMTC time window position of the second cell according to the DMTC information of the second cell, the terminal may receive the DRS sent by the second cell in the DMTC time window of the second cell, and calculate the second cell according to the receiving condition of the DRS. Channel occupancy.

The following describes how to calculate the channel occupancy rate of the second cell based on the reception condition of the DRS in step S13 of the embodiment of the present disclosure.

Illustratively, step S13 of the embodiment of the present disclosure includes steps S131 to S133.

Step S131: The terminal receives the discovery reference signal DRS sent by each second cell in the time window of the DMTC of each second cell according to the DMTC information.

Step S132: The terminal determines the reception success rate of the DRS for each second cell in the set time.

The receiving success rate of the DRS of each second cell is equal to the ratio of the number of times the terminal detects the DMTC with DRS detected by the second cell in the set time to the total number of time windows of the DMTC in the set time. .

Step S133: The terminal quantizes the channel occupancy rate of each second cell according to the reception success rate of the discovery reference signal DRS of each second cell. Specifically, the higher the success rate, the lower the quantized channel occupancy rate; conversely, the higher the success rate, the higher the quantized channel occupancy rate.

After determining the channel occupancy rate or the channel occupancy ratio comparison result of each second cell, the terminal may select one of the preferred cells as the target cell.

The following describes the scheme for selecting the target cell in detail.

Illustratively, if the first information of the embodiment of the present disclosure is the channel occupancy rate of the second cell, when performing the foregoing step S13, the terminal selects a signal in the second cell whose channel occupancy rate satisfies the first setting condition. The second cell with the highest strength is used as the target cell; or the second cell with the lowest channel occupancy rate is selected as the target cell in the second cell whose signal strength meets the second set condition.

If the first information of the embodiment of the present disclosure is the channel occupancy comparison result of all the second cells, when performing the foregoing step S13, the terminal compares the channel occupancy rate according to the channel in the second cell whose signal strength meets the second setting condition. A second cell with the lowest channel occupancy rate is selected as the target cell.

It should be noted that, in practical applications, the terminal in the embodiment of the present disclosure does not necessarily need to select a second cell to perform handover. For example, if the channel occupancy rate of all the second cells does not reach a reference condition, the terminal cannot select the target. The cell, in this case, will still maintain access to the first cell. Alternatively, the present disclosure may also compare the second cell that is preferably taken out with the first cell, and when the channel occupancy rate of the second cell that is preferably taken out is better than the first cell, it is used as the target cell. Switch.

In addition, the terminal in the embodiment of the present disclosure may directly receive the target cell determined by the base station of the first cell, and select a target cell determined by the base station of the first cell to initiate a cell handover request. For example, the first base station selects a target cell to be handed over for the terminal according to the obtained channel occupancy rate of the second cell, and then sends the target cell identity to the terminal by using a dedicated RRC message. If the dedicated RRC message received by the terminal includes the target cell determined by the base station of the first cell, the cell access request for the target cell in the dedicated RRC message may be directly initiated.

The terminal in the embodiment of the present disclosure may also receive the second cell list sent by the first base station, where the second cell list indicates the second cell that the terminal can switch. The terminal selects a second cell belonging to the second cell list as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell.

Embodiments of the present disclosure also provide a cell handover method applied to a base station. As shown in FIG. 2, the cell handover method applied to the base station includes step S21.

Step S21: The base station of the first cell sends the first information of the at least one second cell to the terminal that accesses the first cell, so that the terminal determines the channel occupancy rate or channel occupancy rate of the at least one second cell according to the first information. Comparing the result, and selecting a second cell as the target cell to be accessed according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell.

Obviously, based on the cell handover method of the embodiment of the present disclosure, the base station of the current cell of the terminal can provide the terminal with the first information of the neighboring cell of the other base station, so that the terminal can determine the channel occupancy rate or the neighboring cell of the neighboring cell according to the first information. The channel occupancy ratio comparison result between the cells, so that it is possible to select a neighboring cell to perform handover based on the channel occupancy rate.

Specifically, in the above step S21 of the embodiment of the present disclosure, the base station of the first cell transmits the first information to the terminal through the dedicated radio resource control RRC message or through the public system broadcast message.

Furthermore, it can be known from the above description that the channel occupancy of the second cell is determined by the base station of the second cell by channel detection. Therefore, in the cell handover method of the embodiment of the present disclosure, the base station of the first cell is required to acquire the channel occupancy rate of the at least one second cell from the base station of the at least one second cell, and then the base station of the first cell is obtained according to the obtained The channel occupancy of the at least one second cell generates the first information.

In the specific method for acquiring the channel occupancy rate, the base station of the first cell may send a channel occupancy request message to the base station of each second cell through the S1 interface or the X2 interface, and the base station receiving the second cell is occupied according to the channel. The channel occupancy response message fed back by the rate request message. The channel occupancy response message includes a channel occupancy rate of the second cell.

The base station of the first cell may also receive the channel occupancy indication message sent by the base station of the at least one second cell by using the S1 interface or the X2 interface, where the channel occupancy indication message includes the channel occupancy rate of the second cell.

Similarly, the base station of the first cell of the embodiment of the present disclosure may also send the channel occupancy rate of the first cell to the base station of the second cell in the foregoing manner, so that the base station of the second cell may send the first to the other terminals that it accesses. The channel occupancy rate of the cell allows the terminal under the base station of the second cell to also select whether to switch to the first cell based on the channel occupancy rate.

In addition, the base station of the first cell of the embodiment of the present disclosure also selects a second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, and sends the selected target cell by using the foregoing RRC message. To the terminal, the terminal directly initiates a cell access request for a target cell in the RRC message.

The cell handover method applied to the terminal and the cell handover method applied to the base station of the present disclosure will be described in detail below with reference to examples.

Example one

This example discloses a scheme in which a terminal autonomously selects a target cell for access. In the automatic handover, when the terminal determines that the handover needs to be performed by measuring the channel quality of the current access cell and the neighboring cell, the cell access request may be initiated to the autonomously selected target cell without receiving the handover command of the base station, even when the terminal After measuring the channel quality of the current access cell and the neighboring cell, it is determined that the handover report is not required when the handover needs to be performed.

In this example, it is assumed that the current cell of the terminal is the first cell of the first base station, and the cell access request is initiated to the second cell of the second base station. The second cell is a neighboring cell of the first cell, and the second cell and the second cell to which the second cell belongs are not only one base station, and the corresponding specific handover procedure may include: receiving, by the terminal, the channel that is sent by the first base station and includes the second cell. The first information of the occupancy rate, or the terminal determines the first information including the channel occupancy rate of the second cell by detecting the discovery reference signal DRS of the second cell.

There are two methods for the terminal to obtain the first information of the channel occupancy rate of the second cell.

Method 1: The terminal receives the first information that is sent by the first base station and includes the channel occupancy rate of the second cell.

The first base station may include the first information including the channel occupancy of the second cell in the RRC message and send the message to the terminal, so that the terminal selects the handover target cell according to the first information that includes the channel occupancy rate in the RRC message. The first base station may receive first information including a channel occupancy rate of the second cell from the second base station, where the second cell is a serving cell of the second base station or a neighboring cell of the second base station serving cell.

The first base station may receive the first information of the channel occupancy rate of the second cell periodically sent by the second base station, or after the second base station receives the channel occupancy rate request sent by the first base station, the second base station may The first base station feeds back first information including a channel occupancy rate of the second cell.

Further, the terminal may initiate a measurement report for the second cell to the first base station. If the first base station receives the measurement report of the terminal, the information about the channel occupancy rate of the second cell indicated in the measurement report may be included in the RRC message and sent to the terminal.

Method 2: Determine the channel occupancy rate of the second cell by detecting the DRS of the second cell. The second cell periodically uses the idle subframe to send the DRS in the DMTC time window, so the terminal can receive the DRS in the DMTC time window and measure the channel occupancy of the second cell through the DRS.

In a specific implementation, the terminal obtains the DMTC information of the DRS that is sent by the second cell by using the cell broadcast information SIB3 or the SIB5 that is served by the first base station, or obtains the RRC reconfiguration message that is sent by the first base station and includes the measurement configuration information. The second cell transmits the DMTC information of the DRS. If the measurement configuration information of the second cell sent by the first base station does not include the DMTC information of the second cell, the terminal further obtains the DMTC information of the DRS sent by the second cell by reading the public system broadcast message of the second cell. The DMTC information includes the DMTC parameters introduced above, and the DMTC parameters may be a DMTC window period, a DMTC window subframe offset, or a DMTC window duration. The terminal may obtain the location of the DMTC time window of the second cell by using the DMTC information of the second cell.

Under the relevant LBT mechanism, the second cell can only transmit the DRS in the idle subframe. Therefore, not every DMTC window can send the DRS of the second cell, and if the terminal does not detect the DRS, the channel of the second cell is busy, and the terminal can correspondingly quantize the second cell by using the detected ratio of the second cell DRS. Channel occupancy. The ratio of the detected second cell DRS may be calculated as a ratio of the number of times the second cell DRS is detected within the set time to the number of DMTC windows in the set time.

In addition, the terminal may further receive the second cell list sent by the first base station, where the second cell list indicates the second cell that the terminal can switch. The terminal may select only one second cell belonging to the second cell list as the target cell. Therefore, in the first example, the terminal may only detect the DRS of the second cell located in the list, and calculate the channel occupancy rate of the second cell.

In the process of determining the target cell, the terminal selects the second cell with the lowest channel occupancy rate as the target cell of the terminal handover according to the first information of the channel occupancy rate of the second cell that is sent by the first base station; or the terminal detects the second cell according to the second cell. The DRS obtains the channel occupancy rate of the second cell, and selects the second cell with the lowest channel occupancy as the target cell of the terminal handover.

Based on the above description, the process in which the terminal selects the target cell for handover by using the DRS of the second cell is as shown in FIG. 3.

Further, as an alternative, the terminal may select the target cell according to the second cell channel occupancy rate and the second cell signal quality. For example, in the second cell in which the signal quality satisfies the handover condition (for example, the A3 event trigger condition is satisfied), the terminal selects the second cell with the lowest channel occupancy as the target cell to be handed over. For example, in the second cell whose channel occupancy rate meets the specified threshold, the terminal selects the second cell with the highest signal quality as the target cell to be switched.

Example two

The second example discloses a method for a terminal to perform cell handover according to a cell channel occupancy situation. The method can be used for traditional handover of the terminal in the related art (ie, handover controlled by the base station) and also for automatic handover of the terminal. In the traditional handover, the terminal performs pilot signal measurement on the neighboring cell; when the measurement result satisfies the handover event condition, the terminal sends a measurement report to the current base station; the current base station prepares for handover according to the measurement report to other base stations of one or more neighboring cells. Sending a handover request message, after receiving a handover request response message of another base station, selecting one of the target cells and transmitting a handover command based on the target cell to the terminal. In the terminal autonomous handover, when the terminal determines that the handover needs to be performed by measuring the channel quality of the current access cell and the neighboring cell, the UE may initiate a cell access request to the autonomously selected target cell without waiting for receiving the handover command of the current base station, even when After the terminal measures the channel occupancy rate of the current access cell and the neighboring cell, it is determined that the measurement report needs to be performed, and the measurement report is not sent to the current base station.

In the second example, it is assumed that the current cell of the terminal is the first cell of the first base station, and the cell access request is to be initiated to the second cell of the second base station. The second cell is a neighboring cell of the first cell, and the second cell and the second cell to which it belongs are not one base station, and the corresponding specific handover procedure may include: receiving, by the first base station, the second cell that is sent by the second base station The first information of the channel occupancy. Specifically, the first base station receives, by using at least one of the following manners 1 and 2, first information that is sent by the second base station and includes a channel occupancy rate of the second cell.

Manner 1: Receive first information that is periodically sent by the second base station and includes a channel occupancy rate of the second cell.

In this manner, the first base station may receive the first information that is sent by the second base station and includes the channel occupancy rate of the second cell, regardless of whether the terminal needs to perform handover. The first base station may receive information of channel occupancy of one or more second cells, and information of channel occupancy of the one or more second cells may be sent by one or more second base stations. The information about the channel occupancy rate of the second cell received by the first base station may be sent by the second base station, or may be that the second base station feeds back after the channel occupancy rate request periodically sent by the first base station.

Manner 2: After receiving the measurement report sent by the terminal, the first base station sends information about the channel occupancy rate of the second cell to the second base station.

In a specific implementation, the first base station may determine, according to the measurement report of the neighboring cell sent by the terminal, that the terminal needs to perform handover (traditional or automatic handover), and the first base station may determine, as the second cell, the cell indicated in the measurement report reported by the terminal, And sending a channel occupancy request message to the second base station, and then receiving a channel occupancy response message fed back by the second base station based on the channel occupancy rate request, where the channel occupancy response message carries the first channel occupancy rate of the second cell information.

Specifically, the first base station may receive, by using an X2 interface message or an S1 interface message, first information that is sent by the second base station and includes a channel occupancy rate of the second cell, where the X2 interface message or the S1 interface message may be the foregoing first message. The first message described above may also be a new dedicated message.

For example, in the first mode, the first base station periodically receives, by using the X2 message eNB configuration update or the eNB configuration update acknowledge or the Resource Status Update, the first information that is sent by the second base station and includes the channel occupancy of the second cell. Further, the first base station may request, by using the S1 or X2 interface message, the second base station to send the first information including the channel occupancy rate of the second cell, where the channel occupancy rate request message is included in the S1 or X2 interface message, for example, the first The base station may request the second base station to send the first information including the channel occupancy rate of the second cell by using a Resource Status Request message of the X2 interface.

In a specific implementation, the second cell may be a serving cell of the second base station or a neighboring cell of the second base station serving cell. When the second cell is the serving cell of the second base station, the first base station receives information about the channel occupancy rate of the second cell that is sent by the second base station through its serving cell information. When the second cell is a neighboring cell of the second cell serving cell, the first base station receives information about the channel occupancy rate of the second cell that is sent by the second base station through its neighbor cell information. If the information about the channel occupancy of the second cell is transmitted by the serving cell information of the second base station, the Serving cell Information in the eNB configuration update and the eNB configuration update acknowledge message includes a Channel Occupy Info field, and has the following encoding format.

If the information about the channel occupancy rate of the second cell is transmitted by the neighbor cell information of the serving cell of the second base station, refer to the above table, the Channel Occupy included in the Neigbour Information in the Serving cell Information in the eNB configuration update and the eNB configuration update acknowledge message. Info field, and has the following encoding format.

For example, in the second mode, when the first base station determines that the terminal performs the traditional handover, the first handover request message (Handover Request) of the X2 interface sends a request for the second cell channel occupancy rate to the second base station, where A handover request message carries a request identifier of a second cell channel occupancy rate; and receives, by a first handover response Acknowledge of the X2 interface, a second base station, based on a request for a second cell channel occupancy rate, Information on the channel occupancy of the second cell. Or the first base station sends a request for the second cell channel occupancy rate to the second base station by using a second handover request message (Handover Require) of the S1 interface, where the second handover request message carries the request for the second cell channel occupancy rate. Identifying; and receiving, by the second handover response message (Handover Command) of the S1 interface, information that the second base station feeds back based on the second cell channel occupancy rate, based on the request for the second cell channel occupancy rate.

The format of the Handover Request Acknowledge is as follows.

The message format of the Handover Command is as follows.

When the first base station determines that the terminal performs the automatic handover, the first base station sends a second cell channel occupancy request message to the second base station by using the first automatic handover request of the X2 interface, and carries the message in the second cell channel occupancy request message. And receiving, by the first automatic switching response message of the X2 interface, information that includes the second cell channel occupancy rate sent by the second base station, or the second automatic switching request of the S1 interface to the second base station Sending a second cell channel occupancy rate request message, where the second cell channel occupancy rate request message carries a request identifier of the second cell channel occupancy rate; and receiving, by the second automatic handover response message of the S1 interface, the second base station Information on the channel occupancy of the second cell. The first automatic handover request and the second automatic handover request further carry context information of the terminal, and the context information of the terminal is information required by the base station to perform cell handover.

In the traditional handover or the automatic handover of the terminal, the first base station sends a second cell channel occupancy request message to the second base station through the S1 or X2 interface, to request the second cell to feed back information about the channel occupancy rate of the second cell. The second cell channel occupancy request message carries a request identifier of the second cell channel occupancy rate. The second base station, based on the request identifier of the second cell channel occupancy rate, purposely feeds back the channel occupancy rate of the corresponding second cell to the first base station by using the channel occupancy rate response message.

After the first base station acquires the information about the channel occupancy of the second cell from the second base station, the information is sent to the terminal, so that the terminal selects the target cell to be switched according to the information about the channel occupancy rate of the second cell. The information for transmitting the channel occupancy rate of the second cell to the terminal may include the following two manners.

Method 1: The obtained information including the channel occupancy rate of the second cell is periodically sent to the terminal.

Method 2: When the terminal switches, the first base station sends the acquired information including the channel occupancy rate of the second cell to the terminal.

In the first method, the first base station may send the acquired information including the channel occupancy rate of the second cell to the terminal by using the public system broadcast message of the cell accessed by the terminal. Optionally, it is sent to the terminal through SIB1 or SIB2, or through the SIB-MF in the Mutlefire cell.

Among them, the method one further includes the following two sub-modes.

Sub-mode 1: The received information including the channel occupancy rate of the second cell is included in the channel occupancy indication message and sent to the terminal, so that the terminal selects the target cell to be switched according to the channel occupancy indication message.

Specifically, the first base station sends information of channel occupancy of the second cell by using an RRCReConfiguration message. The manner in which the information of the second cell channel occupancy rate is included in the RRCReConfiguration may be various. For example, it may be explicitly notified that the channel occupancy value of the first cell is directly included in the RRC reconfiguration message and sent to the terminal; or implicitly, the second cell identifier may be high to low or low according to the channel occupancy rate. The order to the high (ie, the channel occupancy comparison result of the second cell) is included in the RRC reconfiguration message and sent to the terminal.

Further, if the first base station receives the measurement report of the terminal, the second cell channel occupancy rate information indicated in the measurement report may be included in the RRC reconfiguration message and sent to the terminal. Sub-mode 1 is used for the terminal automatic handover process, and the measurement report is a measurement report for automatic handover of the terminal.

Sub-mode 2: The first base station selects the target cell to be handed over for the terminal according to the received second cell channel occupancy rate information, and then the target cell identifier is included in the cell handover indication message and sent to the terminal, so that the terminal performs the cell handover indication message. The target cell in the cell initiates a cell access request.

The first base station may select, as the target cell of the terminal handover, the second cell with the lowest channel occupancy rate in the second cell list received from the second base station, and send the target cell identifier to the terminal in the cell handover indication information (for example, In the conventional handover, the cell handover indication message is included in the handover command message and sent to the terminal).

Further, the first base station may further select, as the target cell of the terminal handover, a second cell with the lowest channel occupancy rate in the second cell that meets the set channel quality. For another example, the first base station selects a cell with the highest signal quality as the target cell to be switched, in the second cell whose channel occupancy rate meets the specified threshold, which is applicable to the traditional handover procedure of the related art.

Obviously, based on the above description, in the second example, if the terminal side selects the target cell, the corresponding handover procedure may be as shown in FIG. 4; if the first base station selects the target cell for the terminal, the corresponding handover procedure may be as shown in FIG. .

In addition, an embodiment of the present disclosure further provides a terminal 100 that accesses a first cell. As shown in FIG. 6, the terminal 100 includes a transceiver 101, a memory 102, an executor 103, and a processor 104.

The memory 102 stores a software program; the processor 104 is configured to: control the transceiver 101 to acquire first information of at least one second cell by using a base station of the first cell, each second a cell is a neighboring cell of the first cell and belongs to a different base station from the first cell; and according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell is determined; And comparing, by using the channel occupancy rate or the channel occupancy ratio of the at least one second cell, a second cell is selected as the target cell; and the executor 103 is controlled to initiate a cell access request for the target cell.

Apparently, the terminal in this embodiment can select a neighboring cell with a lower channel occupancy rate to perform handover, thereby improving the success rate of the handover cell and avoiding the delay caused by the handover failure. For the user experience, it has important improvements.

The processor 104 specifically controls the transceiver 101 to acquire the first information of the at least one second cell by using the base station of the first cell, by using the software program, including: sending the dedicated information from the base station of the first cell. Obtaining the first information in a radio resource control RRC message; or acquiring the first information from a public system broadcast message sent by a base station of the first cell.

As an exemplary introduction, the first information may be a channel occupancy or channel occupancy comparison result of the at least one second cell; the processor 104 specifically controls the transceiver 101 from running by running the software program. The channel occupancy rate or channel occupancy comparison result of the at least one second cell is obtained from the RRC reconfiguration message sent by the base station of the first cell or from the public system broadcast message SIB1, SIB2 or SIB-MF.

Alternatively, the first information may be measurement configuration information of the at least one second cell. Correspondingly, the processor 104 specifically controls, by running the software program, the RRC reconfiguration message sent by the transceiver 101 from the base station of the first cell, or the public system sent by the base station of the first cell. Acquiring measurement configuration information of the at least one second cell in a broadcast message SIB3 or SIB5; and the processor 104 determines the at least one second according to the measurement configuration information of the at least one second cell by running the software program The channel occupancy rate of the cell.

The determining, by the processor 104, the channel occupancy rate of the at least one second cell according to the measurement configuration information of the at least one second cell by using the software program, including: determining, according to the measurement configuration information, the second a time window of the DMTC of the cell, and receiving a discovery reference signal DRS sent by each second cell in a time window of the DMTC of the second cell; determining that the terminal 100 is DRS for each second cell within a set time Receiving success rate, wherein the receiving success rate of the DRS of each second cell is equal to the number of times the terminal 100 detects the DMTC with DRS detected by the second cell within the set time and the time window of the DMTC within the set time The ratio of the total number of frequencies; and the channel occupancy rate of each second cell is quantized according to the DRS reception success rate of each second cell.

The processor 104, by running the software program, selecting a second cell as the target cell according to the channel occupancy rate of the at least one second cell, includes: in the second cell where the channel occupancy rate meets the first setting condition The second cell with the highest signal strength is selected as the target cell; or the second cell with the lowest channel occupancy is selected as the target cell in the second cell whose signal strength meets the second set condition.

The processor 104, by running the software program, selects a second cell as the target cell in the at least one second cell according to the channel occupancy comparison result of the at least one second cell, including: A second cell with the lowest channel occupancy rate is selected as the target cell in the second cell whose strength meets the second set condition.

In addition, the first information in this embodiment may further include a target cell that is determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell. That is, the processor may be configured to: according to the first information, directly select, according to the first information, a target cell that is determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell.

It should be noted that, in an actual application, the processor in the embodiment of the present disclosure does not necessarily need to select a second cell to initiate a handover. For example, when the channel occupancy rate of all the second cells does not reach a reference condition, the target cell cannot be selected. In this case, the access to the first cell will still be maintained. Alternatively, the present disclosure may also compare the second cell that is preferably taken out with the first cell, and when the channel occupancy rate of the second cell that is preferably taken out is better than the first cell, it is used as the target cell. Switch.

In addition, the terminal 100 of the embodiment of the present disclosure may select a target cell to perform handover in another base station required by the base station of the first cell, that is, the processor 104 of the embodiment of the present disclosure is further configured to: control the The transceiver 101 receives a second cell list sent by the base station of the first cell, where the second cell list indicates a second cell that the terminal can switch, so that the terminal 100 is occupied according to the channel of the at least one second cell. For the rate or channel occupancy comparison result, a second cell belonging to the second cell list is selected as the target cell.

It is apparent that the terminal of the embodiment of the present disclosure corresponds to the cell switching method applied to the terminal side provided above, and thus the same technical effect can be achieved. In addition, it should be noted that, according to the description, the terminal of the embodiment of the present disclosure may be a mobile phone (or mobile phone), or other device capable of transmitting or receiving a wireless signal, including a user equipment, a personal digital assistant, a wireless modem, and a wireless device. Communication devices, handheld devices, laptop computers, cordless phones, wireless local loop stations, CPE or Mifi capable of converting mobile signals into wifi signals, smart home appliances, or other non-human operations can spontaneously communicate with mobile communication networks Equipment, etc.

Moreover, embodiments of the present disclosure also provide a base station 200 having a first cell. As shown in FIG. 7, the base station 200 includes a transceiver 201, a memory 202, and a processor 203.

The memory 202 stores a software program. The processor 203 is configured to: run the software program to: control the transceiver 201 to send first information of at least one second cell to a terminal that accesses the first cell, so that the terminal is configured according to the first information. Determining a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell, and selecting a second cell as the target cell to be accessed according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell .

Obviously, the base station in the embodiment of the present disclosure can provide the information of the neighboring cell of the other base station to the terminal in the cell, so that the terminal can determine the channel occupancy rate of the neighboring cell or the channel occupancy ratio comparison result between the neighboring cells according to the information, thereby It is possible to select a preferred cell for handover based on the channel occupancy rate.

Specifically, the processor 203 of the embodiment of the present disclosure controls the transceiver 201 to send the first information of the at least one second cell to the terminal accessing the first cell by running the software program, including: controlling the RRC by using a dedicated radio resource. The first information is sent to the terminal by a message or by a public system broadcast message.

As an exemplary introduction, the first information of the embodiment of the present disclosure may be a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell. The processor 203 controls the transceiver 201 to encapsulate the channel occupancy or channel occupancy comparison result of the at least one second cell in an RRC reconfiguration message or in the public system broadcast message SIB1, SIB2 or by running the software program. After the SIB-MF, the RRC reconfiguration message is sent to the terminal.

Alternatively, the first information of the embodiment of the present disclosure may be discovery signal measurement configuration information of the at least one second cell. The processor 203, after running the software program, to control the transceiver 201 to encapsulate the measurement configuration information of the at least one second cell in an RRC reconfiguration message, and send the RRC reconfiguration message to the terminal; or The processor 203, after running the software program, controls the transceiver 201 to encapsulate the measurement configuration information of the at least one second cell in the public system broadcast message SIB3 or SIB5, and sends the public system broadcast message SIB3 or SIB5. To the terminal.

In addition, the processor 203 of the embodiment of the present disclosure controls the transceiver 201 to control the transceiver 201 to transmit the first information of the at least one second cell to the terminal accessing the first cell by running the software program. The base station of the at least one second cell acquires the channel occupancy rate of the at least one second cell, and then generates the first information according to the obtained channel occupancy rate of the at least one second cell.

The processor 203, by running the software program, controls the transceiver 201 to acquire the channel occupancy rate of the at least one second cell from the base station of the at least one second cell, including: using an S1 interface or an X2 interface Transmitting a channel occupancy request message by the base station of the at least one second cell, and receiving, by the base station of the at least one second cell, a channel occupancy response message fed back according to the channel occupancy rate request message, the channel occupancy response message The channel occupancy rate of the second cell is included.

In addition, the processor 203 of the embodiment of the present disclosure is further configured to: control the transceiver 201 to send a second cell list to the terminal by running the software program, where the second cell list indicates a second cell that the terminal can switch And the terminal selects, according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, a second cell that belongs to the second cell list as the target cell.

In addition, the processor 203 of the embodiment of the present disclosure is further configured to: after controlling the transceiver 201 to send the first information of the at least one second cell to the terminal, receive, by the terminal, at least one sent by the terminal. Measurement report of the second cell.

In an actual application, the processor 203 may control the transceiver 201 to feed back to the terminal the channel occupancy rate or channel occupancy comparison result of the second cell selected in the measurement report.

Of course, the processor 203 of the embodiment of the present disclosure is further configured to: control the transceiver 201 to send a channel occupancy rate of the first cell to a base station of the at least one second cell by using the software program, so that the first The base station of the second cell may send the channel occupancy rate or channel occupancy comparison result of the second cell to other terminals to which it belongs.

In addition, the processor 203 of the embodiment of the present disclosure is further configured to: according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, select a second cell as the target cell; The target cell selected by the channel occupancy of the at least one second cell is used as the first information, and is sent to the terminal by using a dedicated RRC message, so that the terminal directly initiates a target cell in the RRC message. Cell access request.

It is apparent that the base station of the embodiment of the present disclosure corresponds to the cell handover method applied to the base station provided by the present disclosure, and thus the same technical effect can be achieved.

In addition, an embodiment of the present disclosure further provides a terminal 300 that accesses a first cell. As shown in FIG. 8, the terminal 300 includes: an obtaining module 301, configured to acquire first information of at least one second cell by using a base station of the first cell, where each second cell is a neighboring cell of the first cell and And the first module belongs to a different base station; the determining module 302 is configured to determine, according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell; the selecting module 303 is configured And selecting, according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, a second cell of the at least one second cell as the target cell; the access module 304 is configured to initiate the Cell access request of the target cell.

The terminal in the embodiment of the present disclosure can select a neighboring cell with a lower channel occupancy rate to perform handover, thereby improving the success rate of the handover cell and avoiding the delay caused by the handover failure. For the user experience, it has important improvements.

The obtaining module 301 is further configured to acquire the first information from a dedicated radio resource control RRC message sent by the base station of the first cell, or acquire the public system broadcast message sent by the base station of the first cell. The first information is described.

As an exemplary introduction, the first information may be a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell; the acquiring module 301 is further configured to transmit an RRC weight from the base station of the first cell. The channel occupancy or channel occupancy comparison result of the at least one second cell is obtained in the configuration message or from the public system broadcast message SIB1, SIB2 or SIB-MF.

Alternatively, the first information may be measurement configuration information of the at least one second cell. Correspondingly, the acquiring module 301 is further configured to obtain the at least the RRC reconfiguration message sent by the base station of the first cell, or the public system broadcast message SIB3 or SIB5 sent by the base station of the first cell. Measurement configuration information of a second cell.

The determining module 302 is further configured to determine a time window of the DMTC of the second cell according to the measurement configuration information. The terminal 300 further includes a receiving module 305 configured to receive a discovery reference signal DRS initiated by each second cell within a time window of the DMTC of the second cell. The determining module 302 is further configured to determine a receiving success rate of the DRS of the second cell for each second cell in the set time, where the receiving success rate of the DRS of each second cell is equal to the terminal 300 for the second cell. a ratio of the number of times the DMTC having the DRS detected in the set time is compared to the total number of time windows of the DMTC in the set time; and quantifying each second cell according to the DRS reception success rate of each second cell Channel occupancy.

The selecting module 303 is further configured to: select, in the second cell whose channel occupancy rate meets the first setting condition, a second cell with the highest signal strength as the target cell; or the signal strength meets the second setting condition. In the second cell, a second cell with the lowest channel occupancy rate is selected as the target cell.

In addition, the first information in this embodiment may further include a target cell that is determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell. The selecting module 303 is further configured to: directly select, according to the first information, a target cell that is determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell.

It should be noted that, in an actual application, the terminal 300 does not necessarily need to select a second cell to initiate a handover. For example, when the channel occupancy rate of all the second cells does not reach a reference condition, the target cell cannot be selected. Will maintain access to the first cell. Alternatively, the present disclosure may also compare the second cell that is preferably taken out with the first cell, and when the channel occupancy rate of the second cell that is preferably taken out is better than the first cell, it is used as the target cell. Switch.

It is apparent that the terminal of the embodiment of the present disclosure corresponds to the cell switching method applied to the terminal side provided above, and thus the same technical effect can be achieved.

Moreover, embodiments of the present disclosure also provide a base station 400 having a first cell. As shown in FIG. 9, the base station 400 includes a sending module 401, and the sending module 401 is configured to send the first information of the at least one second cell to the terminal accessing the first cell, so that the terminal determines, according to the first information, the Comparing the channel occupancy rate or the channel occupancy ratio of the at least one second cell, and selecting a second cell as the target cell to be accessed according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell.

Specifically, the sending module 401 is further configured to control the RRC message by using a dedicated radio resource, or send the first information to the terminal by using a public system broadcast message.

As an exemplary introduction, the first information of the embodiment of the present disclosure may be a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell. The sending module 401 is further configured to encapsulate the channel occupancy or channel occupancy comparison result of the at least one second cell in an RRC reconfiguration message or after in the public system broadcast message SIB1, SIB2 or SIB-MF, The RRC reconfiguration message is sent to the terminal.

Alternatively, the first information of the embodiment of the present disclosure may be discovery signal measurement configuration information of the at least one second cell. The sending module 401 is further configured to: after the measurement configuration information of the at least one second cell is encapsulated in an RRC reconfiguration message, send the RRC reconfiguration message to the terminal; or the at least one second After the measurement configuration information of the cell is encapsulated in the public system broadcast message SIB3 or SIB5, the public system broadcast message SIB3 or SIB5 is sent to the terminal.

In addition, the base station 400 further includes an obtaining module 402 and a generating module 403, where the obtaining module 402 is configured to send, before the sending module 401 sends the first information of the at least one second cell to the terminal accessing the first cell, Obtaining a channel occupancy rate of the at least one second cell from the base station of the at least one second cell; the generating module 403 is configured to acquire the at least one from the base station of the at least one second cell in the acquiring module 402 After the channel occupancy of the second cell, the first information is generated according to the obtained channel occupancy rate of the at least one second cell.

The obtaining module 402 is further configured to: send, by using an S1 interface or an X2 interface, a channel occupancy request message to the base station of the at least one second cell, and receive, by the base station of the at least one second cell, the channel occupancy rate according to the channel occupancy rate. And a channel occupancy response message fed back by the request message, where the channel occupancy response message includes a channel occupancy rate of the second cell.

In addition, the sending module 401 is further configured to send a second cell list to the terminal, where the second cell list indicates a second cell that the terminal can switch, so that the terminal according to the channel occupancy rate of the at least one second cell or As a result of the channel occupancy comparison, a second cell belonging to the second cell list is selected as the target cell.

In addition, before the sending module 401 sends the first information of the at least one second cell to the terminal, the acquiring module 402 receives the measurement report sent by the terminal for the at least one second cell. The sending module 401 is further configured to feed back, to the terminal, a channel occupancy rate or a channel occupancy comparison result of the second cell selected in the measurement report.

The sending module 401 is further configured to send, to the base station of the at least one second cell, a channel occupancy rate of the first cell, so that the base station of the second cell can send the channel of the second cell to other terminals to which the second cell belongs. Occupancy or channel occupancy comparison results.

In addition, the base station 400 may further include a selecting module 404, where the selecting module 404 is configured to select a second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, and The target cell selected according to the channel occupancy rate of the at least one second cell is used as the first information; the sending module 401 is further configured to send the first information to the terminal by using a dedicated RRC message, so that the The terminal directly initiates a cell access request for the target cell in the RRC message.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present disclosure. It should also be considered as the scope of protection of the present disclosure.

Claims

A cell handover method is applied to a terminal, where the terminal accesses a first cell, and the method includes:

Acquiring, by the base station of the first cell, the first information of the at least one second cell, where each second cell is a neighboring cell of the first cell and belongs to a different base station from the first cell;

Determining, according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

Selecting one of the at least one second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell;

Initiating a cell access request for the target cell.
The cell handover method according to claim 1, wherein the acquiring, by the base station of the first cell, the first information of the at least one second cell comprises:

Obtaining the related information from a dedicated radio resource control RRC message sent by the base station of the first cell; or

And acquiring the related information from a public system broadcast message sent by the base station of the first cell.
The cell handover method according to claim 1, wherein the first information is a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

Acquiring, by the base station of the first cell, the first information of the at least one second cell, including:

Acquiring the channel occupation of the at least one second cell from the RRC reconfiguration message sent by the base station of the first cell, or from the public system broadcast message SIB1, SIB2 or SIB-MF sent by the base station of the first cell Rate or channel occupancy comparison results.
The cell handover method according to claim 1, wherein the first information is measurement configuration information of the at least one second cell;

Acquiring, by the base station of the first cell, the first information of the at least one second cell, including:

Acquiring measurement configuration information of the at least one second cell from an RRC reconfiguration message sent by the base station of the first cell, or from a public system broadcast message SIB3 or SIB5 sent by the base station of the first cell;

Determining, by the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell, including:

Determining, according to the measurement configuration information of the at least one second cell, a channel occupancy rate of the at least one second cell.
The cell handover method according to claim 4, wherein determining the channel occupancy rate of the at least one second cell according to the measurement configuration information of the at least one second cell comprises:

Determining, according to the measurement configuration information, a time window of the DMTC of the second cell, and receiving a discovery reference signal DRS initiated by each second cell in a time window of the DMTC of the second cell;

Determining, by the terminal, a success rate of receiving the DRS for each second cell in the set time, where a receiving success rate of the DRS of each second cell is equal to that the terminal detects that the second cell is within the set time Ratio of the number of DMTCs with DRS to the total number of time windows of the DMTC within the set time;

The channel occupancy rate of each second cell is quantized according to the DRS reception success rate of each second cell.
The cell handover method according to claim 1, wherein selecting a second cell as the target cell according to the channel occupancy rate of the at least one second cell comprises:

In the second cell whose channel occupancy rate satisfies the first set condition, selecting a second cell with the highest signal strength as the target cell; or

In the second cell whose signal strength satisfies the second setting condition, the second cell with the lowest channel occupancy rate is selected as the target cell.
The cell handover method according to claim 1, wherein the selecting one of the at least one second cell as the target cell according to the channel occupancy comparison result of the at least one second cell comprises:

In the second cell whose signal strength satisfies the second setting condition, the second cell with the lowest channel occupancy rate is selected as the target cell.
The cell handover method according to claim 1, wherein the first information further comprises a target cell determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell;

Selecting one of the at least one second cell as the target cell includes:

Determining, according to the first information, a target cell that is determined according to a channel occupancy rate of the at least one second cell and sent by a base station of the first cell.
The cell handover method according to claim 2, wherein the acquiring the first information from the dedicated radio resource control RRC message sent by the base station of the first cell comprises:

Transmitting, to the base station of the first cell, a measurement report for the at least one second cell, so that the base station of the first cell generates an RRC message carrying the first information according to the measurement report;

Receiving an RRC message sent by the base station of the first cell, and acquiring the first information from the RRC message.
The cell handover method according to claim 1, wherein the one of the at least one second cell is selected as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, including:

Receiving a second cell list sent by the base station of the first cell, where the second cell list indicates a second cell that the terminal can switch;

And selecting, according to a comparison result of the channel occupancy rate or the channel occupancy ratio of the at least one second cell, a second cell in the second cell list as the target cell.
A cell handover method applied to a base station of a first cell, comprising:

Transmitting, by the terminal accessing the first cell, the first information of the at least one second cell, so that the terminal determines, according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell, And selecting, according to the channel occupancy rate or channel occupancy ratio comparison result of the at least one second cell, a second cell as the target cell to be accessed.
The cell handover method according to claim 11, wherein the transmitting the first information of the at least one second cell to the terminal accessing the first cell comprises:

The RRC message is controlled by a dedicated radio resource, or the first information is sent to the terminal by a public system broadcast message.
The cell handover method according to claim 11, wherein the first information is a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

And transmitting the first information of the at least one second cell to the terminal that accesses the first cell, including:

After the channel occupancy rate or channel occupancy comparison result of the at least one second cell is encapsulated in an RRC reconfiguration message or encapsulated in a public system broadcast message SIB1, SIB2 or SIB-MF, the RRC reconfiguration message or The public system broadcast message is sent to the terminal.
The method of claim 11, wherein the first information is measurement configuration information of the at least one second cell;

And transmitting the first information of the at least one second cell to the terminal that accesses the first cell, including:

After the measurement configuration information of the at least one second cell is encapsulated in an RRC reconfiguration message, the RRC reconfiguration message is sent to the terminal, or

After the measurement configuration information of the at least one second cell is encapsulated in the public system broadcast message SIB3 or SIB5, the public system broadcast message SIB3 or SIB5 is sent to the terminal.
The cell handover method according to claim 11, wherein before the first information of the at least one second cell is sent to the terminal that accesses the first cell, the method further includes:

Obtaining, by the base station of the at least one second cell, a channel occupancy rate of the at least one second cell;

Generating the first information according to the obtained channel occupancy rate of the at least one second cell, where the channel occupancy rate of the second cell includes a ratio of channel busy time of the second cell to a total time, Or the ratio of the time that the second cell occupies the channel to the total time.
The cell handover method according to claim 15, wherein the acquiring the channel occupancy rate of the at least one second cell from the base station of the at least one second cell comprises:

Transmitting, by the S1 interface or the X2 interface, a channel occupancy request message to the base station of the at least one second cell, and

And receiving, by the base station of the at least one second cell, a channel occupancy response message fed back according to the channel occupancy request message, where the channel occupancy response message includes a channel occupancy rate of the second cell.
The cell handover method according to claim 16, wherein a channel occupancy request message is sent to the base station of the at least one second cell through the X2 interface, and the base station receiving the at least one second cell according to the channel occupancy rate The channel occupancy response message fed back by the request message includes:

Sending, by the first automatic handover request signaling of the X2 interface, the channel occupancy request message to the base station of the at least one second cell, where the automatic handover request further carries the context information of the terminal, and passes the The X2 interface receives the first automatic handover request response signaling including the channel occupancy response message sent by the at least one second cell.
The cell handover method according to claim 16, wherein a channel occupancy request message is sent to the base station of the at least one second cell through the X2 interface, and the base station receiving the at least one second cell according to the channel occupancy rate The channel occupancy response message fed back by the request message includes:

Transmitting the channel occupancy request message to the base station of the at least one second cell by using resource status request signaling of the X2 interface, and receiving, by using an X2 interface, the channel that is sent by the base station of the at least one second cell The resource status update signaling of the occupancy response message.
The cell handover method according to claim 16, wherein a channel occupancy request message is sent to the base station of the at least one second cell through the S1 interface, and the base station receiving the at least one second cell according to the channel occupancy rate The channel occupancy response message fed back by the request message includes:

Sending, by the second automatic handover request signaling of the S1 interface, the channel occupancy request message to the base station of the at least one second cell, where the second automatic handover request further carries the context information of the terminal, And receiving, by the S1 interface, the second automatic handover response signaling that is sent by the at least one second cell and includes the channel occupancy response message.
The cell handover method according to claim 15, wherein the obtaining the channel occupancy of the at least one second cell from the base station of the at least one second cell further includes:

Obtaining, by the S1 interface or the X2 interface, a channel occupancy indication message sent by the base station of the at least one second cell, where the channel occupancy indication message includes a channel occupancy rate of the second cell.
The cell handover method according to claim 20, wherein the receiving, by the S1 interface or the X2 interface, the channel occupancy indication message sent by the base station of the at least one second cell, includes:

The channel occupancy indication message sent by the base station of the at least one second cell is periodically received through an eNB configuration update or an eNB configuration update acknowledge or a Resource Status Update signaling of the X2 interface.
The cell handover method according to claim 11, further comprising:

Sending, to the terminal, a second cell list, where the second cell list indicates a second cell that the terminal can switch, so that the terminal compares the channel occupancy rate or the channel occupancy rate according to the at least one second cell, A second cell belonging to the second cell list is selected as the target cell.
The cell handover method according to claim 11, wherein before the sending the first information of the at least one second cell to the terminal, the method further includes:

Receiving a measurement report sent by the terminal for the at least one second cell.
The cell handover method according to claim 11, further comprising:

Transmitting a channel occupancy rate of the first cell to a base station of the at least one second cell.
The cell handover method according to claim 12, further comprising: selecting a target cell according to a channel occupancy rate of the at least one second cell;

The sending, by the terminal accessing the first cell, the first information of the at least one second cell includes:

The target cell selected according to the channel occupancy rate of the at least one second cell is used as the first information, and the first information is sent to the terminal by using a dedicated RRC message, so that the terminal directly initiates the A cell access request of a target cell in an RRC message.
A terminal that accesses a first cell and includes:

A memory and a processor, wherein the memory is for storing a software program; the processor is operative to execute the method to control the terminal to perform the method of any one of claims 1-10.
A base station, the base station having a first cell and comprising:

Memory and processor;

Wherein the memory is used to store a software program;

The processor controls the base station to perform the method of any of claims 11-25 by running the software program.
A terminal that accesses a first cell and includes:

An acquiring module, configured to acquire first information of at least one second cell by using a base station of the first cell, where each second cell is a neighboring cell of the first cell and belongs to a different base station from the first cell ;

a determining module, configured to determine, according to the first information, a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

The selecting module is configured to select a second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell;

An access module configured to initiate a cell access request for the target cell.
The terminal according to claim 28, wherein the obtaining module is further configured to: acquire the first information from a dedicated radio resource control RRC message sent by a base station of the first cell, or from the first cell The first information is obtained in a public system broadcast message sent by the base station.
The terminal according to claim 28, wherein the first information is a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

The acquiring module is further configured to acquire a channel occupancy rate or a channel of the at least one second cell from an RRC reconfiguration message sent by the base station of the first cell or from a public system broadcast message SIB1, SIB2 or SIB-MF Occupancy comparison results.
The terminal according to claim 28, wherein the first information is measurement configuration information of the at least one second cell;

The acquiring module is further configured to acquire the at least one second cell from an RRC reconfiguration message sent by the base station of the first cell, or from a public system broadcast message SIB3 or SIB5 sent by the base station of the first cell. Measurement configuration information;

The determining module is further configured to determine a time window of the DMTC of the second cell according to the measurement configuration information;

The terminal further includes a receiving module configured to receive a discovery reference signal DRS initiated by each second cell within a time window of the DMTC of the second cell.
The terminal of claim 31, wherein the determining module is further configured to:

Determining, by the receiving module, a receiving success rate of the DRS for each second cell in a set time, where a receiving success rate of the DRS of each second cell is equal to that the terminal detects for the second cell within a set time The ratio of the number of DMTCs with DRS to the total number of time windows of the DMTC within the set time;

The channel occupancy rate of each second cell is quantized according to the DRS reception success rate of each second cell.
The terminal of claim 28, wherein the selection module is further configured to:

Selecting, in the second cell whose channel occupancy rate meets the first set condition, a second cell with the highest signal strength as the target cell; or selecting a channel occupancy rate in the second cell whose signal strength meets the second set condition The lowest second cell is used as the target cell.
The terminal according to claim 28, wherein the first information comprises a target cell determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell;

The selecting module is further configured to: directly select, according to the first information, a target cell that is determined by a base station of the first cell according to a channel occupancy rate of the at least one second cell.
A base station, the base station having a first cell and comprising:

And a sending module, configured to send the first information of the at least one second cell to the terminal that accesses the first cell, so that the terminal determines, according to the first information, a channel occupancy rate or a channel of the at least one second cell The occupancy ratio is compared, and a second cell of the at least one second cell is selected as the target cell to be accessed according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell.
The base station according to claim 35, wherein the transmitting module is further configured to:

The RRC message is controlled by a dedicated radio resource, or the first information is sent to the terminal by a public system broadcast message.
The base station according to claim 35, wherein the first information is a channel occupancy rate or a channel occupancy ratio comparison result of the at least one second cell;

The sending module is further configured to encapsulate the channel occupancy or channel occupancy comparison result of the at least one second cell in an RRC reconfiguration message or after in the public system broadcast message SIB1, SIB2 or SIB-MF, The RRC reconfiguration message is sent to the terminal.
The base station according to claim 35, wherein the first information is discovery signal measurement configuration information of the at least one second cell;

The transmitting module is further configured to: after the measurement configuration information of the at least one second cell is encapsulated in an RRC reconfiguration message, send the RRC reconfiguration message to the terminal; or the at least one second After the measurement configuration information of the cell is encapsulated in the public system broadcast message SIB3 or SIB5, the public system broadcast message SIB3 or SIB5 is sent to the terminal.
The base station according to claim 35, further comprising:

An acquiring module, configured to acquire, after the sending module sends the first information of the at least one second cell to the terminal that accesses the first cell, the channel of the at least one second cell from the base station of the at least one second cell Occupancy rate;

a generating module, configured to: after acquiring, by the acquiring module, the channel occupancy rate of the at least one second cell from the base station of the at least one second cell, according to the obtained channel occupancy rate of the at least one second cell, Generating the first information, where the channel occupancy of the second cell includes a ratio of a channel busy time of the second cell to a total time, or a ratio of a time occupied by the second cell to a total time.
The base station according to claim 39, wherein the obtaining module is further configured to:

Transmitting a channel occupancy request message to the base station of the at least one second cell through an S1 interface or an X2 interface; and

And receiving, by the base station of the at least one second cell, a channel occupancy response message fed back according to the channel occupancy request message, where the channel occupancy response message includes a channel occupancy rate of the second cell.
The base station according to claim 35, wherein the transmitting module is further configured to send a second cell list to the terminal, the second cell list indicating a second cell that the terminal can switch, so that the terminal according to the at least one As a result of comparing the channel occupancy rate or the channel occupancy ratio of the second cell, a second cell belonging to the second cell list is selected as the target cell.
The base station according to claim 35, wherein the acquisition module receives the measurement for the at least one second cell sent by the terminal before the sending module sends the first information of the at least one second cell to the terminal report;

The sending module is further configured to feed back, to the terminal, a channel occupancy rate or a channel occupancy comparison result of the second cell selected in the measurement report.
The base station according to claim 35, wherein the transmitting module is further configured to send a channel occupancy rate of the first cell to a base station of the at least one second cell, such that a base station of the second cell belongs to The other terminal sends the channel occupancy rate or channel occupancy comparison result of the second cell.
The base station according to claim 35, further comprising:

The selecting module is configured to select a second cell as the target cell according to the channel occupancy rate or the channel occupancy ratio comparison result of the at least one second cell, and select a target according to the channel occupancy rate of the at least one second cell. a cell as the first information;

The sending module is further configured to send the first information to the terminal by using a dedicated RRC message, so that the terminal directly initiates a cell access request for a target cell in the RRC message.
The base station according to claim 40, wherein the acquisition module is further configured to:

Sending, by the first automatic handover request signaling of the X2 interface, the channel occupancy request message to the base station of the at least one second cell, where the automatic handover request further carries context information of the terminal, and

Receiving, by the X2 interface, first automatic handover request response signaling including the channel occupancy response message sent by the at least one second cell.
The base station according to claim 40, wherein the acquisition module is further configured to:

Transmitting the channel occupancy request message to the base station of the at least one second cell by resource status request signaling of the X2 interface, and

Receiving, by the X2 interface, resource status update signaling including the channel occupancy response message sent by the base station of the at least one second cell.