Switching judgment method, device and equipment and readable storage medium

Abstract

The invention discloses a switching judgment method, device and equipment and a readable storage medium, relates to the technical field of communication, and aims to reduce air interface signaling overhead. The method comprises the following steps: acquiring a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell; and performing switching judgment according to the first uplink measurement report and the second uplink measurement report. According to the embodiment of the invention, the air interface signaling overhead can be reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a handover decision method, apparatus, device, and readable storage medium. Background Art

[0002] Currently, for measurement-based handover, when a terminal moves from the coverage area of one cell to another cell, a change of the serving cell needs to be performed at a certain moment. In the current serving cell change process, whether it is based on L3 (Layer 3) measurement or L1 (Layer 1) measurement, the base station needs to perform measurement configuration. The terminal performs measurements according to the requirements of the measurement configuration and then reports the measurement results, and the base station then performs based on the received measurement results.

[0003] Then, in this way, there may be a large number of measurement messages, resulting in a large signaling overhead on the air interface. Summary of the Invention

[0004] Embodiments of this application provide a handover decision method, apparatus, device, and readable storage medium to reduce the signaling overhead on the air interface.

[0005] In a first aspect, an embodiment of this application provides a handover decision method, which is applied to a first network function and includes:

[0006] Obtain a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell;

[0007] Perform a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0008] Optionally, the first network function is set in a centralized Media Access Control (MAC), or the first network function is set independently of a distributed MAC and a centralized MAC;

[0009] The obtaining of the first uplink measurement report of at least one candidate cell and the second uplink measurement report of the source cell includes:

[0010] Obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and obtain the second uplink measurement report sent by the distributed MAC of the source cell.

[0011] Optionally, the first network function is set in a base station corresponding to the source cell; or the first network function is set independently of the base station corresponding to the source cell.

[0012] Optionally, the first network function includes a distributed MAC set in the base station corresponding to the source cell;

[0013] Obtaining the first uplink measurement report of at least one candidate cell includes:

[0014] Obtaining the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

[0015] Optionally, the method further includes:

[0016] Sending first information to the source cell, where the first information is used to indicate information about the target cell for handover.

[0017] Optionally, the method further includes:

[0018] Obtaining information about the candidate cell set;

[0019] Obtaining the third uplink measurement report of at least one cell, where the at least one cell includes cells that can receive the uplink reference signal of the terminal;

[0020] Updating the candidate cell set according to the information about the candidate cell set and the third uplink measurement report.

[0021] Optionally, the method further includes:

[0022] Sending second information to the terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

[0023] In a second aspect, an embodiment of the present application provides a handover decision method applied to a second network function, including:

[0024] Obtaining the first uplink measurement report of at least one candidate cell;

[0025] Sending the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision.

[0026] Optionally, the second network function includes: a distributed MAC set in the at least one candidate cell, or an independently set distributed MAC, or the base station corresponding to the at least one candidate cell.

[0027] In a third aspect, an embodiment of the present application provides a handover decision method applied to a third network function, including:

[0028] Obtaining the second uplink measurement report of the source cell;

[0029] Sending the second uplink measurement report to a first network function, where the second uplink measurement report is used for handover decision.

[0030] Optionally, the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

[0031] Optionally, the method further includes:

[0032] Receiving first information sent by the first network function, where the first information is used to indicate information about a target cell for handover;

[0033] Sending a handover message to the terminal according to the first information.

[0034] Optionally, the sending a handover message to the terminal according to the first information includes:

[0035] Sending the handover message to the terminal through a Media Access Control (MAC) Control Element (CE).

[0036] In a fourth aspect, an embodiment of the present application provides a handover decision method, which is applied to a terminal and includes:

[0037] Receiving a handover message sent by a source cell;

[0038] Performing a handover according to the handover message;

[0039] Wherein, the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function makes a handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

[0040] Optionally, the method further includes:

[0041] Receiving second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

[0042] In a fifth aspect, an embodiment of the present application provides a handover decision device, which is applied to a first network function and includes:

[0043] A first acquisition module, configured to acquire a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell;

[0044] A first processing module, configured to make a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0045] Optionally, the first network function is disposed in a centralized media MAC, or the first network function is disposed independently of a distributed MAC and a centralized MAC;

[0046] The first acquisition module is configured to:

[0047] Acquire the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and acquire the second uplink measurement report sent by the distributed MAC of the source cell.

[0048] Optionally, the first network function is set in the base station corresponding to the source cell; or, the first network function is set independently of the base station corresponding to the source cell.

[0049] Optionally, the first network function includes a distributed MAC set in the source cell; the first acquisition module is configured to:

[0050] Acquire the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

[0051] Optionally, the apparatus further includes:

[0052] A first sending module, configured to send first information to the source cell, where the first information is used to indicate information about a target cell for handover.

[0053] Optionally, the apparatus further includes:

[0054] A second acquisition module, configured to acquire information about a candidate cell set;

[0055] A third acquisition module, configured to acquire a third uplink measurement report of at least one cell, where the at least one cell includes a cell that can receive an uplink reference signal of a terminal;

[0056] A first update module, configured to update the candidate cell set according to the information about the candidate cell set and the third uplink measurement report.

[0057] Optionally, the apparatus further includes:

[0058] A second sending module, configured to send second information to a terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

[0059] In a sixth aspect, an embodiment of the present application provides a handover decision apparatus applied to a second network function, including:

[0060] A first acquisition module, configured to acquire a first uplink measurement report of at least one candidate cell;

[0061] A first sending module, configured to send the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision.

[0062] Optionally, the second network function includes: a distributed MAC disposed in the at least one candidate cell, or an independently disposed distributed MAC, or a base station corresponding to the at least one candidate cell.

[0063] In a seventh aspect, an embodiment of the present application provides a handover decision device applied to a third network function, including:

[0064] A first obtaining module, configured to obtain a second uplink measurement report of a source cell;

[0065] A first sending module, configured to send the second uplink measurement report to a first network function, where the second uplink measurement report is used for handover decision.

[0066] Optionally, the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

[0067] Optionally, the device may further include:

[0068] A first receiving module, configured to receive first information sent by the first network function, where the first information is used to indicate information of a target cell for handover;

[0069] A second sending module, configured to send a handover message to a terminal according to the first information.

[0070] Optionally, the second sending module is further configured to send the handover message to the terminal through a MAC CE.

[0071] In an eighth aspect, an embodiment of the present application provides a handover decision device applied to a terminal, including:

[0072] A first receiving module, configured to receive a handover message sent by a source cell;

[0073] A first processing module, configured to perform handover according to the handover message;

[0074] Wherein, the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function performs handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

[0075] Optionally, the device may further include:

[0076] A second receiving module, configured to receive second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

[0077] In a ninth aspect, an embodiment of the present application provides a handover decision device, which is applied to a first network function and includes: a processor and a transceiver;

[0078] The processor is configured to obtain a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell; and perform a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0079] Optionally, the first network function is set in a centralized MAC, or the first network function is set independently of a distributed MAC and a centralized MAC; the processor is further configured to,

[0080] obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and obtain the second uplink measurement report sent by the distributed MAC of the source cell.

[0081] Optionally, the first network function is set in a base station corresponding to the source cell; or the first network function is set independently of the base station corresponding to the source cell.

[0082] Optionally, the first network function includes a distributed MAC set in the base station corresponding to the source cell; the processor is further configured to obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

[0083] Optionally, the processor is further configured to send first information to the source cell, where the first information is used to indicate information about a target cell for handover.

[0084] Optionally, the processor is further configured to:

[0085] obtain information about a candidate cell set;

[0086] obtain a third uplink measurement report of at least one cell, where the at least one cell includes a cell that can receive an uplink reference signal of a terminal;

[0087] update the candidate cell set according to the information about the candidate cell set and the third uplink measurement report.

[0088] Optionally, the processor is further configured to:

[0089] send second information to a terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

[0090] In a tenth aspect, an embodiment of the present application provides a handover decision device, which is applied to a second network function and includes: a processor and a transceiver;

[0091] The processor is configured to obtain a first uplink measurement report of at least one candidate cell; and send the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision-making.

[0092] Optionally, the second network function includes: a distributed MAC disposed in the at least one candidate cell, or an independently disposed distributed MAC, or a base station corresponding to the at least one candidate cell.

[0093] In an eleventh aspect, an embodiment of the present application provides a handover decision-making device applied to a third network function, including: a processor and a transceiver;

[0094] The processor is configured to obtain a second uplink measurement report of a source cell; and send the second uplink measurement report to a first network function, where the second uplink measurement report is used for handover decision-making.

[0095] Optionally, the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

[0096] Optionally, the processor is further configured to:

[0097] receive first information sent by the first network function, where the first information is used to indicate information about a target cell for handover;

[0098] send a handover message to the terminal according to the first information.

[0099] Optionally, the processor is further configured to:

[0100] send the handover message to the terminal through a MAC CE.

[0101] In a twelfth aspect, an embodiment of the present application provides a handover decision-making device applied to a terminal, including: a processor and a transceiver;

[0102] The processor is configured to receive a handover message sent by a source cell;

[0103] perform handover according to the handover message;

[0104] where the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function makes a handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

[0105] Optionally, the processor is further configured to receive second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

[0106] In a thirteenth aspect, an embodiment of the present application further provides a communication device, including: a memory, a processor, and a program stored on the memory and executable on the processor, where when the processor executes the program, the steps in the handover decision method described above are implemented.

[0107] In a fourteenth aspect, an embodiment of the present application further provides a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the steps in the handover decision method described above are implemented.

[0108] In an embodiment of the present application, the first network function can make a handover decision based on the first uplink measurement report of at least one candidate cell and the second uplink measurement report of the source cell, thereby eliminating the need for a large number of measurement messages and reducing the signaling overhead on the air interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] Figure 1 is one of the flowcharts of the handover decision method provided by an embodiment of the present application;

[0110] FIG. 2(a) is a schematic diagram of the deployment of the first network function according to an embodiment of the present application;

[0111] FIG. 2(b) is a schematic diagram of the deployment of the first network function according to an embodiment of the present application;

[0112] Figure 3 is a schematic diagram of the network architecture according to an embodiment of the present application;

[0113] Figure 4 is a second flowchart of the handover decision method provided by an embodiment of the present application;

[0114] Figure 5 is a third flowchart of the handover decision method provided by an embodiment of the present application;

[0115] Figure 6 is a fourth flowchart of the handover decision method provided by an embodiment of the present application;

[0116] Figure 7 is a fifth flowchart of the handover decision method provided by an embodiment of the present application;

[0117] Figure 8 is a sixth flowchart of the handover decision method provided by an embodiment of the present application;

[0118] Figure 9 is a seventh flowchart of the handover decision method provided by an embodiment of the present application;

[0119] Figure 10 is an eighth flowchart of the handover decision method provided by an embodiment of the present application;

[0120] Figure 11It is one of the structural diagrams of the handover decision device provided by the embodiments of the present application;

[0121] Figure 12 It is the second structural diagram of the handover decision device provided by the embodiments of the present application;

[0122] Figure 13 It is the third structural diagram of the handover decision device provided by the embodiments of the present application;

[0123] Figure 14 It is the fourth structural diagram of the handover decision device provided by the embodiments of the present application;

[0124] Figure 15 It is the fifth structural diagram of the handover decision device provided by the embodiments of the present application;

[0125] Figure 16 It is the sixth structural diagram of the handover decision device provided by the embodiments of the present application;

[0126] Figure 17 It is the seventh structural diagram of the handover decision device provided by the embodiments of the present application;

[0127] Figure 18 It is the eighth structural diagram of the handover decision device provided by the embodiments of the present application. Detailed implementation manners

[0128] In the embodiments of the present application, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0129] In the embodiments of the present application, the term "a plurality of" means two or more, and other quantifiers are similar.

[0130] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0131] See Figure 1 , Figure 1 It is the flowchart of the handover decision method provided by the embodiments of the present application, which is applied to a first network function. As Figure 1 shown, it includes the following steps:

[0132] Step 101: Obtain the first uplink measurement report of at least one candidate cell and the second uplink measurement report of the source cell.

[0133] In an embodiment of the present application, the first network function may also be referred to as a Handover Controller (HOC) module. This module is mainly responsible for functions such as collecting uplink measurement reports and storing configurations of candidate cells.

[0134] This module can be deployed independently of the base station, or can be deployed in the base station where the source cell is located, or can also be deployed in a Centralized-Media Access Control (C-MAC), or can also be deployed in a Distributed-Media Access Control (D-MAC), or can be deployed independently of the distributed MAC and the centralized MAC. The protocol layer to which this module belongs can be L2 or L3 (Radio Resource Control, RRC). Since it is desired to minimize latency as much as possible, this module can be deployed in L2.

[0135] The optional deployment locations of this module are shown in Figures 2(a) and 2(b). Among them, Figure 2(a) shows the case where the handover control module is deployed in the base station where the source cell is located, and Figure 2(b) shows the case where the handover control module is deployed independently of the base station where the source cell is located.

[0136] In an embodiment of the present application, as Figure 3 shown, a simple wireless network architecture with two levels of cloud and edge can be provided. The functions of the newly introduced protocol layers in the architecture are introduced as follows:

[0137] L3UP: Add the function of processing IP data packets in the radio access layer. As the processing anchor point of wireless QoS, it controls the L2 packet processing function to achieve more accurate service guarantee for the wireless network;

[0138] C-MAC: Fast control of access nodes: including selection and cooperative control of access nodes, data traffic control, packet scheduling, etc.; Control of plug-and-play links: establishment, selection, handover, etc. of links; Near-end caching of handover data: Fast handover control of data between different access nodes. A handover control module can be deployed in C-MAC.

[0139] D-MAC: Adapt to air interface technologies, shield the differences in physical layer transmission upwards, support multiple physical layer transmission technologies downwards, and complete the measurement and reporting of uplink signals.

[0140] Based on the above architecture, a handover control module can be deployed in C-MAC, and D-MAC completes the measurement and reporting of uplink reference signals.

[0141] It should be noted that in the above architecture, the handover control module can also be deployed in the D-MAC of the source cell, or be deployed independently of the D-MAC or C-MAC.

[0142] If the first network function (handover control module) is set in the centralized MAC, or the first network function is set independently of the distributed MAC and the centralized MAC, in this step, obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and obtain the second uplink measurement report sent by the distributed MAC of the source cell.

[0143] If the first network function (handover control module) is set in the base station corresponding to the source cell, the first network function can obtain the first uplink measurement report of the candidate cell and obtain the second uplink measurement report of the source cell through itself.

[0144] If the first network function (handover control module) is set independently of the base station corresponding to the source cell, the first network function can obtain the first uplink measurement report of the candidate cell and the second uplink measurement report of the source cell.

[0145] If the first network function (handover control module) is set in the distributed MAC corresponding to the source cell, the first network function can obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell and obtain the second uplink measurement report of the source cell through itself.

[0146] For a candidate cell or a source cell, the uplink measurement report can be obtained by measuring the terminal uplink reference signal through its physical layer. Among them, the uplink reference signal can be based on the existing uplink reference signal, such as the sounding reference signal (SRS), or can be a newly introduced uplink reference signal.

[0147] Step 102: Make a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0148] Specifically, in this step, the first network function can make a judgment according to the first uplink measurement report and the second measurement report. If it is determined according to the first uplink measurement report and the second uplink measurement report that the channel quality of the candidate cell is better than the channel quality of the source cell, it can be determined that the terminal needs to be handed over. For example, the first network function can select the cell with the strongest uplink signal as the target cell, or select the cell with the best uplink channel quality as the target cell, or make a selection by synthesizing various factors. If a handover is required, the first network function sends the first information to the source cell, where the first information is used to indicate the information of the target cell for handover.

[0149] In an embodiment of the present application, the first network function may perform handover decision based on the first uplink measurement reports of at least one candidate cell and the second uplink measurement report of the source cell. Thus, without a large number of measurement messages, the signaling overhead on the air interface can be reduced, and at the same time, the complexity of the terminal's measurement can also be reduced. In addition, since the handover decision can be made based on the uplink measurement report, the latency of the processes of measurement, reporting, and decision is reduced, and the accuracy and efficiency of handover are improved.

[0150] Optionally, in an embodiment of the present application, the first network function may also obtain information of a candidate cell set, which represents information of cells that can be used as target cells for handover. For example, the first network function may obtain it from the base station corresponding to the source cell, or obtain it through the information stored by itself, or obtain it from the D-MAC of the source cell, etc. After that, the first network function may obtain the third uplink measurement reports of at least one cell, and update the candidate cell set according to the information of the candidate cell set and the third uplink measurement reports. Wherein, the at least one cell includes cells that can receive the uplink reference signal of the terminal.

[0151] In this process, the first network function may determine a cell set with better channel quality (for example, the channel quality is higher than a certain threshold) according to the third uplink measurement report, and compare this cell set with the candidate cell set. If there is a difference between the two, the candidate cell set may be updated. For example, the cells with better channel quality may be added to the candidate cell set to obtain an updated candidate cell set.

[0152] Optionally, the first network function may also send second information to the terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set, so as to facilitate subsequent accurate handover decision.

[0153] See Figure 4 , Figure 4 is a flowchart of a handover decision method provided by an embodiment of the present application, which is applied to a second network function. As Figure 4 shown, it includes the following steps:

[0154] Step 401, obtain the first uplink measurement reports of at least one candidate cell.

[0155] For a candidate cell, the uplink measurement report can be obtained by measuring the terminal's uplink reference signal through its physical layer. Wherein, the uplink reference signal can be based on an existing uplink reference signal, such as a sounding reference signal, or can be a new uplink reference signal.

[0156] Step 402, send the first uplink measurement report to the first network function, where the first uplink measurement report is used for handover decision.

[0157] Among them, the second network function may include a base station corresponding to a candidate cell, a distributed MAC set in the candidate cell, a separately set distributed MAC, etc.

[0158] In the embodiment of the present application, the first network function may perform a handover decision according to the first uplink measurement report of at least one candidate cell, so that a large number of measurement messages are not required, the signaling overhead of the air interface can be reduced, and at the same time, the complexity of the terminal for measurement can also be reduced. In addition, since the handover decision can be made according to the uplink measurement report, the delay of the processes of measurement, reporting, and decision is reduced, and the accuracy and efficiency of handover are improved.

[0159] See Figure 5 , Figure 5 is a flowchart of the handover decision method provided by the embodiment of the present application, which is applied to the third network function, such as Figure 5 shown, and includes the following steps:

[0160] Step 501, obtain a second uplink measurement report of the source cell.

[0161] For the source cell, the uplink measurement report can be obtained by measuring the terminal uplink reference signal through its physical layer. Among them, the uplink reference signal can be based on the existing uplink reference signal, such as the sounding reference signal, or can be a new uplink reference signal.

[0162] Among them, the third network function may include a base station corresponding to the source cell, a distributed MAC set in the source cell, a separately set distributed MAC, etc.

[0163] Step 502, send the second uplink measurement report to the first network function, where the second uplink measurement report is used for handover decision.

[0164] Optionally, the third network function may also receive the first information sent by the first network function and send a handover message to the terminal according to the first information. Among them, the first information is used to indicate the information of the target cell for handover. For example, the third network function may send a handover message to the terminal through a MAC CE, so as to reduce the delay.

[0165] In the embodiment of the present application, the first network function may perform a handover decision according to the first uplink measurement report of at least one candidate cell, so that a large number of measurement messages are not required, the signaling overhead of the air interface can be reduced, and at the same time, the complexity of the terminal for measurement can also be reduced. In addition, since the handover decision can be made according to the uplink measurement report, the delay of the processes of measurement, reporting, and decision is reduced, and the accuracy and efficiency of handover are improved.

[0166] See Figure 6 , Figure 6It is a flowchart of the handover decision method provided by an embodiment of the present application, which is applied to a terminal. For example, Figure 6 as shown, it includes the following steps:

[0167] Step 601: Receive a handover message sent by the source cell;

[0168] Step 602: Perform a handover according to the handover message;

[0169] Among them, the handover message is sent by the source cell according to the handover decision result of the first network function, and the first network function makes a handover decision based on the first uplink measurement reports of at least one candidate cell and the second uplink measurement report of the source cell. For example, the terminal can receive the handover message sent by the source cell through MAC CE.

[0170] Optionally, in an embodiment of the present application, the terminal can also obtain information about the candidate cell set.

[0171] Optionally, in an embodiment of the present application, the terminal can also receive second information sent by the first network function, where the second information is used to indicate the updated candidate cell set.

[0172] In an embodiment of the present application, the first network function can make a handover decision based on the first uplink measurement reports of at least one candidate cell and the second uplink measurement report of the source cell, so that a large number of measurement messages are not required, the signaling overhead of the air interface can be reduced, and at the same time, the complexity of the terminal for measurement can also be reduced. In addition, since the handover decision can be made based on the uplink measurement report, the delay of the process of measurement, reporting, and decision is reduced, and the accuracy and efficiency of the handover are improved.

[0173] Next, the specific implementation process of the embodiment of the present application will be described in detail in combination with different situations.

[0174] In an embodiment of the present application, the configuration method of the candidate cell is as Figure 7 shown. Generally speaking, it is a semi-static configuration process. The initial configuration of the candidate cell set is configured through RRC signaling, and the configuration of the candidate cell set is dynamically updated according to the radio channel conditions subsequently. This process may include:

[0175] Step 701: RRC (for example, the base station corresponding to the source cell) configures the candidate cell set for the user equipment (UE) through RRC signaling according to actual requirements (such as operations and maintenance (OM) configuration, scenario requirements, etc.).

[0176] Step 702: The cell that can receive the UE uplink reference signal measures the UE uplink reference signal.

[0177] Step 703: The cells that can receive the UE uplink reference signal report the measurement results to the HOC for summarization.

[0178] Step 704: The HOC sends a message to the RRC to query the configuration of the current candidate cell set.

[0179] Step 705: The RRC feeds back the configuration of the current candidate cell set.

[0180] Step 706: The HOC compares the measurement results reported with the candidate cell set.

[0181] The HOC compares the cell set with better measurement results with the currently configured candidate cell set. If there are differences, it triggers the update of the candidate cell set and notifies the UE to update the candidate cell set.

[0182] Step 707: The HOC notifies the UE to update the configuration of the candidate cell set.

[0183] Step 708: The HOC synchronizes the updated candidate cell set to the RRC.

[0184] In Figure 8 it shows the process where the HOC directly measures based on the uplink reference signal and can trigger handover according to the measurement results. This process may include:

[0185] Step 801: The network side (HOC) configures the candidate cell set for the terminal according to actual requirements. The terminal and the candidate cells complete early sync (early synchronization), that is, obtain the synchronization information of the candidate cells in advance through measurement to prepare for the synchronization of the subsequent handover process in advance, so as to reduce the handover delay.

[0186] Step 802: The physical layer of the source cell and the physical layer of the candidate cells measure the UE uplink reference signal. The uplink reference signal in this step can be based on the existing uplink reference signal, such as SRS, or a new uplink reference signal can also be designed.

[0187] Step 803: Each cell forms a measurement report with the measurement results and reports it to the HOC. The measurement report may include the measured uplink signal strength, uplink channel quality, etc.

[0188] Step 804: The HOC makes a comprehensive judgment based on the measurement results of each cell, forms a result, and determines the target cell for handover. For example, the judgment result can select the cell with the strongest uplink signal, or the cell with the best uplink channel quality, or make a selection by combining multiple factors.

[0189] Step 805: The HOC notifies the source cell of the determined target cell for handover through a handover command.

[0190] Step 806: The source cell notifies the UE to perform handover according to the result of the target cell. To reduce latency, it is recommended that this handover message be sent in the form of a MAC CE.

[0191] The terminal switches to the target cell, and at the same time releases the connection and resources of the source cell.

[0192] Based on Figure 3 the system architecture shown, in the embodiment of the present application, the configuration method of candidate cells is as Figure 9 shown. This process may include:

[0193] Step 901: The RRC configures a candidate cell set for the terminal through RRC signaling according to actual requirements (such as OM configuration, scenario requirements, etc.).

[0194] Step 902: The cells that can receive the UE's uplink reference signal perform measurements on the UE's uplink reference signal.

[0195] Step 903: The cells that can receive the UE's uplink reference signal report the measurement results to the C-MAC for summary.

[0196] Step 904: The C-MAC sends a message to the RRC to query the configuration status of the current candidate cell set.

[0197] Step 905: The RRC feeds back the configuration status of the current candidate cell set.

[0198] Step 906: The C-MAC compares the reported measurement results with the candidate cell set.

[0199] The C-MAC compares the cell set with better measurement results with the currently configured candidate cell set. If there are differences, it triggers an update of the candidate cell set and notifies the UE to update the candidate cell set.

[0200] Step 907: The C-MAC notifies the UE to update the configuration of the candidate cell set through a MAC CE.

[0201] Step 908: The C-MAC synchronizes the updated candidate cell set to the RRC.

[0202] Based on Figure 3 the system architecture shown, in the embodiment of the present application, the handover process based on the uplink measurement results is as Figure 10 shown. This process may include:

[0203] Step 1001: The network side configures a candidate cell set for the terminal according to actual requirements. The terminal and the candidate cells complete early sync, that is, obtain the sync information of the candidate cells through measurement in advance to prepare for the sync in the subsequent handover process and reduce the handover latency. The detailed process of configuring the candidate cell set is as described in the foregoing embodiment.

[0204] Step 1002: The physical layer of the source cell and the physical layer of the candidate cell measure the UE uplink reference signal and report it to the D-MAC of the corresponding source cell and the D-MAC of the corresponding candidate cell. The uplink reference signal in this step can be based on the existing uplink reference signal, such as SRS, or a new uplink reference signal can be designed.

[0205] Step 1003: The D-MAC of each cell forms a measurement report with the measurement results and reports it to the C-MAC. The measurement report can include the measured uplink signal strength, uplink channel quality, etc.

[0206] Step 1004: The C-MAC makes a comprehensive judgment based on the measurement results of each cell to form a handover decision result and determine the handover target cell. For example, the decision result can select the cell with the strongest uplink signal, or the cell with the strongest uplink channel quality, or make a selection by integrating multiple factors.

[0207] Step 1005: The C-MAC notifies the D-MAC of the source cell of the determined handover target cell.

[0208] Step 1006: The D-MAC of the source cell forms a MAC CE according to the result of the target cell and notifies the UE to perform a handover through the MAC CE.

[0209] Step 1007: The terminal switches to the target cell, and at the same time releases the connection and resources of the source cell.

[0210] As can be seen from the above description, by using the solution of the embodiment of the present application, the handover is triggered according to the uplink measurement result, reducing the overhead of the air interface signaling and the complexity of the terminal measurement; at the same time, reducing the delay of the process of measurement, reporting, and decision-making, and improving the accuracy and efficiency of the handover.

[0211] See Figure 11 , Figure 11 is the structural diagram of the handover decision device provided by the embodiment of the present application, which is applied to the first network function. As Figure 11 shown, the handover decision device includes:

[0212] The first acquisition module 1101 is configured to acquire the first uplink measurement report of at least one candidate cell and the second uplink measurement report of the source cell;

[0213] The first processing module 1102 is configured to perform a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0214] Optionally, the first network function is set in the centralized media MAC, or the first network function is set independently of the distributed MAC and the centralized MAC;

[0215] The first acquisition module is configured to:

[0216] Acquire the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and acquire the second uplink measurement report sent by the distributed MAC of the source cell.

[0217] Optionally, the first network function is set in the base station corresponding to the source cell; or, the first network function is set independently of the base station corresponding to the source cell.

[0218] Optionally, the first network function includes a distributed MAC set in the base station corresponding to the source cell; the first acquisition module is configured to:

[0219] Acquire the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

[0220] Optionally, the apparatus further includes:

[0221] A first sending module, configured to send first information to the source cell, where the first information is used to indicate information about a target cell for handover.

[0222] Optionally, the apparatus further includes:

[0223] A second acquisition module, configured to acquire information about a candidate cell set;

[0224] A third acquisition module, configured to acquire a third uplink measurement report of at least one cell, where the at least one cell includes a cell that can receive an uplink reference signal of a terminal;

[0225] A first update module, configured to update the candidate cell set according to the information about the candidate cell set and the third uplink measurement report.

[0226] Optionally, the apparatus further includes:

[0227] A second sending module, configured to send second information to the terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

[0228] The apparatus provided in the embodiments of the present application can execute the above method embodiments, and the implementation principles and technical effects are similar, which will not be elaborated herein.

[0229] See Figure 12 , Figure 12 is a structural diagram of a handover decision device provided in the embodiments of the present application, which is applied to a second network function. As Figure 12 shown, the handover decision device includes:

[0230] The first acquisition module 1201 is configured to acquire a first uplink measurement report of at least one candidate cell;

[0231] The first transmission module 1202 is configured to transmit the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision-making.

[0232] Optionally, the second network function includes: a distributed MAC disposed in the at least one candidate cell, or an independently disposed distributed MAC, or a base station corresponding to the at least one candidate cell.

[0233] The apparatus provided by an embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated herein in this embodiment.

[0234] See Figure 13 , Figure 13 is a structural diagram of a handover decision-making apparatus provided by an embodiment of the present application, which is applied to a third network function. As Figure 13 shown, the handover decision-making apparatus includes:

[0235] The first acquisition module 1301 is configured to acquire a second uplink measurement report of a source cell;

[0236] The first transmission module 1302 is configured to transmit the second uplink measurement report to a first network function, where the second uplink measurement report is used for handover decision-making.

[0237] Optionally, the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

[0238] Optionally, the apparatus may further include:

[0239] The first receiving module is configured to receive first information sent by the first network function, where the first information is used to indicate information of a target cell for handover;

[0240] The second transmission module is configured to send a handover message to the terminal according to the first information.

[0241] Optionally, the second transmission module is further configured to send the handover message to the terminal through a MAC CE.

[0242] The apparatus provided by an embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated herein in this embodiment.

[0243] See Figure 14 , Figure 14This is the structural diagram of the handover decision device provided by an embodiment of the present application, which is applied to a terminal. As Figure 14 shown, the handover decision device includes:

[0244] A first receiving module 1401, configured to receive a handover message sent by a source cell;

[0245] A first processing module 1402, configured to perform a handover according to the handover message;

[0246] Wherein, the handover message is sent by the source cell according to the handover decision result of a first network function, and the first network function performs a handover decision according to at least one first uplink measurement report of candidate cells and a second uplink measurement report of the source cell.

[0247] Wherein, the first information is sent by the first network function when deciding to hand over according to at least one first uplink measurement report of candidate cells and a second uplink measurement report of the source cell.

[0248] Optionally, the device may further include:

[0249] A second receiving module, configured to receive second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

[0250] The device provided by the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0251] See Figure 15 , Figure 15 This is the structural diagram of the handover decision device provided by an embodiment of the present application, which is applied to a first network function. As Figure 15 shown, the handover decision device includes: a processor 1501 and a transceiver 1502;

[0252] The processor 1501 is configured to obtain at least one first uplink measurement report of candidate cells and a second uplink measurement report of the source cell; perform a handover decision according to the first uplink measurement report and the second uplink measurement report.

[0253] Optionally, the first network function is set in a centralized MAC, or the first network function is set independently of a distributed MAC and a centralized MAC; the processor is further configured to,

[0254] obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and obtain the second uplink measurement report sent by the distributed MAC of the source cell.

[0255] Optionally, the first network function is set in the base station corresponding to the source cell; or, the first network function is set independently of the base station corresponding to the source cell.

[0256] Optionally, the first network function includes a distributed MAC set in the distributed MAC corresponding to the source cell; the processor is further configured to obtain the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

[0257] Optionally, the processor 1501 is further configured to send first information to the source cell, where the first information is used to indicate information about the target cell for handover.

[0258] Optionally, the processor 1501 is further configured to:

[0259] Obtain information about a candidate cell set;

[0260] Obtain a third uplink measurement report of at least one cell, where the at least one cell includes a cell that can receive an uplink reference signal of the terminal;

[0261] Update the candidate cell set according to the information about the candidate cell set and the third uplink measurement report.

[0262] Optionally, the processor 1501 is further configured to:

[0263] Send second information to the terminal and / or the base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

[0264] The device provided in the embodiments of the present application can execute the above method embodiments, and the implementation principles and technical effects are similar, which will not be elaborated herein.

[0265] See Figure 16 , Figure 16 is a structural diagram of a handover decision device provided in an embodiment of the present application, which is applied to a second network function. As Figure 16 shown, the handover decision device includes: a processor 1601 and a transceiver 1602;

[0266] The processor 1601 is configured to obtain a first uplink measurement report of at least one candidate cell; send the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision.

[0267] Optionally, the second network function includes: a distributed MAC set in the at least one candidate cell, or an independently set distributed MAC, or a base station corresponding to the at least one candidate cell.

[0268] The device provided by the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0269] See Figure 17 , Figure 17 which is the structural diagram of the handover decision device provided by the embodiment of the present application, and is applied to the second network function. As Figure 17 shown, the handover decision device includes: a processor 1701 and a transceiver 1702;

[0270] The processor 1701 is configured to obtain a second uplink measurement report of a source cell; and send the second uplink measurement report to the first network function, where the second uplink measurement report is used for handover decision.

[0271] Optionally, the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

[0272] Optionally, the processor 1701 is further configured to:

[0273] receive first information sent by the first network function, where the first information is used to indicate information of a target cell for handover;

[0274] send a handover message to the terminal according to the first information.

[0275] Optionally, the processor 1701 is further configured to:

[0276] send the handover message to the terminal through a MAC CE. The device provided by the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0277] See Figure 18 , Figure 18 which is the structural diagram of the handover decision device provided by the embodiment of the present application, and is applied to the terminal. As Figure 18 shown, the handover decision device includes: a processor 1801 and a transceiver 1802;

[0278] The processor 1801 is configured to receive a handover message sent by a source cell;

[0279] perform handover according to the handover message;

[0280] wherein the handover message is sent by the source cell according to a handover decision result of the first network function, and the first network function performs handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

[0281] Optionally, the processor 1801 is further configured to receive second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

[0282] It should be noted that the division of units in the embodiments of the present application is illustrative. It is only a logical function division, and there may be other division methods in actual implementation. In addition, in each embodiment of the present application, each functional unit may be integrated into a processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0283] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0284] An embodiment of the present application provides a communication device, including: a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read the program in the memory to implement the steps in the handover decision method described above.

[0285] An embodiment of the present application further provides a readable storage medium, on which a program is stored. When the program is executed by a processor, it implements each process of the above handover decision method embodiment and can achieve the same technical effect. To avoid repetition, it will not be elaborated here. Among them, the readable storage medium may be any available medium or data storage device accessible by the processor, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical discs (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid state drives (SSDs), etc.).

[0286] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0287] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, disk, optical disc) and includes several instructions for causing a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0288] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A handover decision method, characterized in that, applied to a first network function, including: obtaining a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell; making a handover decision according to the first uplink measurement report and the second uplink measurement report.

2. The method according to claim 1, characterized in that, the first network function is set in a centralized Medium Access Control (MAC), or the first network function is set independently of a distributed MAC and a centralized MAC; the obtaining of the first uplink measurement report of at least one candidate cell and the second uplink measurement report of the source cell includes: obtaining the first uplink measurement report sent by the distributed MAC of the at least one candidate cell, and obtaining the second uplink measurement report sent by the distributed MAC of the source cell.

3. The method according to claim 1, characterized in that, the first network function is set in a base station corresponding to the source cell; or the first network function is set independently of the base station corresponding to the source cell.

4. The method according to claim 1, characterized in that, the first network function includes a distributed MAC set in the base station corresponding to the source cell; the obtaining of the first uplink measurement report of at least one candidate cell includes: obtaining the first uplink measurement report sent by the distributed MAC of the at least one candidate cell.

5. The method according to any one of claims 1 to 4, characterized in that, the method further includes: sending first information to the source cell, where the first information is used to indicate information of a target cell for handover.

6. The method according to any one of claims 1 to 4, characterized in that, the method further includes: obtaining information of a candidate cell set; obtaining a third uplink measurement report of at least one cell, where the at least one cell includes a cell capable of receiving an uplink reference signal of a terminal; updating the candidate cell set according to the information of the candidate cell set and the third uplink measurement report.

7. The method according to claim 6, characterized in that, the method further includes: sending second information to a terminal and / or a base station corresponding to the source cell, where the second information is used to indicate the updated candidate cell set.

8. A method, characterized in that, applied to a second network function, including: obtaining a first uplink measurement report of at least one candidate cell; sending the first uplink measurement report to a first network function, where the first uplink measurement report is used for making a handover decision.

9. The method according to claim 8, characterized in that, the second network function includes: a distributed MAC set in the at least one candidate cell, or an independently set distributed MAC, or a base station corresponding to the at least one candidate cell.

10. A handover decision method, characterized in that, applied to a third network function, including: obtaining a second uplink measurement report of a source cell; sending the second uplink measurement report to a first network function, where the second uplink measurement report is used for making a handover decision.

11. The method according to claim 10, It is characterized in that the third network function includes: a distributed MAC disposed in the source cell, or an independently disposed distributed MAC, or a base station corresponding to the source cell.

12. The method according to claim 10, It is characterized in that the method further includes: receiving first information sent by the first network function, where the first information is used to indicate information of a target cell for handover; sending a handover message to the terminal according to the first information.

13. The method according to claim 12, It is characterized in that the sending the handover message to the terminal according to the first information includes: sending the handover message to the terminal through a Media Access Control Control Element (MAC CE).

14. A handover decision method, It is characterized in that applied to a terminal, and includes: receiving a handover message sent by a source cell; performing a handover according to the handover message; wherein the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function makes a handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

15. The method according to claim 14, It is characterized in that the method further includes: receiving second information sent by the first network function, where the second information is used to indicate an updated candidate cell set.

16. A handover decision device, It is characterized in that applied to a first network function, and includes: a first acquisition module, configured to acquire a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell; a first processing module, configured to make a handover decision according to the first uplink measurement report and the second uplink measurement report.

17. A handover decision device, It is characterized in that applied to a second network function, and includes: a first acquisition module, configured to acquire a first uplink measurement report of at least one candidate cell; a first sending module, configured to send the first uplink measurement report to the first network function, where the first uplink measurement report is used for handover decision.

18. A handover decision device, It is characterized in that applied to a third network function, and includes: a first acquisition module, configured to acquire a second uplink measurement report of a source cell; a first sending module, configured to send the second uplink measurement report to the first network function, where the second uplink measurement report is used for handover decision.

19. A handover decision device, It is characterized in that applied to a terminal, and includes: a first receiving module, configured to receive a handover message sent by a source cell; a first processing module, configured to perform a handover according to the handover message; wherein the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function makes a handover decision according to a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

20. A handover decision device, It is characterized in that applied to a first network function, and includes: a processor and a transceiver; The processor is configured to obtain a first uplink measurement report of at least one candidate cell and a second uplink measurement report of a source cell, and make a handover decision based on the first uplink measurement report and the second uplink measurement report.

21. A handover decision device Characterized in that It is applied to a second network function and includes a processor and a transceiver; The processor is configured to obtain a first uplink measurement report of at least one candidate cell and send the first uplink measurement report to a first network function, where the first uplink measurement report is used for handover decision making.

22. A handover decision device Characterized in that It is applied to a third network function and includes a processor and a transceiver; The processor is configured to obtain a second uplink measurement report of a source cell and send the second uplink measurement report to a first network function, where the second uplink measurement report is used for handover decision making.

23. A handover decision device Characterized in that It is applied to a terminal and includes a processor and a transceiver; The processor is configured to receive a handover message sent by a source cell and perform a handover according to the handover message; wherein the handover message is sent by the source cell according to a handover decision result of a first network function, and the first network function makes a handover decision based on a first uplink measurement report of at least one candidate cell and a second uplink measurement report of the source cell.

24. A communication device Comprising: A memory, a processor, and a program stored on the memory and executable on the processor; characterized in that the processor is configured to read the program in the memory to implement the steps in the method according to any one of claims 1 to 15.

25. A readable storage medium for storing a program Characterized in that When the program is executed by a processor, it implements the steps in the method according to any one of claims 1 to 15.

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