Mobility management method, communication device and storage medium

Abstract

The present application discloses a mobility management method, communication equipment and storage medium, belonging to the field of communication technology. The method comprises: obtaining a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell; based on the first user perception indicator and the second user perception indicator, determining a target neighboring cell that meets a target condition in the at least one neighboring cell, wherein the target condition comprises: the second user perception indicator of the target neighboring cell is greater than the first user perception indicator of the serving cell; and migrating a target user equipment of the serving cell to the target neighboring cell.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a mobility management method, communication equipment and storage medium. Background Art

[0002] In related technologies, mobility methods based on load or channel quality are usually used to perform user migration between multiple frequency layers of New Radio (NR) or between NR / Long Term Evolution (LTE) systems. However, on the one hand, load or channel quality is only one of the factors that affect user perception. Traditional evaluation methods based on load or channel quality cannot directly reflect user perception and it is difficult to accurately improve the user perception level under the network. On the other hand, the main feature of the multi-frequency layer networking scenario is that there are differences in the standards, bandwidth, and channel interference between frequency layers. Even if the load or channel quality is the same, there will be differences in user perception between frequency layers. Therefore, the inter-frequency user migration method based on load and channel quality cannot reflect user perception and cannot improve the user perception level.

[0003] Application Contents

[0004] The purpose of the embodiments of the present application is to provide a mobility management method, communication equipment and storage medium, which can solve the problem that the inter-frequency user migration method based on load and channel quality cannot reflect user perception and cannot improve the user perception level.

[0005] In a first aspect, an embodiment of the present application provides a mobility management method, including: obtaining a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell; based on the first user perception indicator and the second user perception indicator, determining a target neighboring cell that meets a target condition in the at least one neighboring cell, wherein the target condition includes: the second user perception indicator of the target neighboring cell is greater than the first user perception indicator of the serving cell; and migrating a target user equipment of the serving cell to the target neighboring cell.

[0006] In a second aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be executed on the processor, and when the program or instructions are executed by the processor, the mobility management method of the first aspect mentioned above is implemented.

[0007] In a third aspect, an embodiment of the present application provides a storage medium, wherein the readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the mobility management method of the first aspect described above is implemented.

[0008] In an embodiment of the present application, a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell are obtained, and based on the first user perception indicator and the second user perception indicator, a target neighboring cell that meets the target condition in the at least one neighboring cell is determined, and a target user equipment of the serving cell is migrated to the target neighboring cell. Therefore, by adopting the mobility management method provided in an embodiment of the present application, the target user equipment can be migrated based on the second user perception indicators of the serving cell and the neighboring cell, so that the mobility management can reflect the user perception and improve the user perception level. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a flow chart of a mobility management method provided in an embodiment of the present application;

[0010] Figure 2 This is a schematic diagram of user perception indicator interaction of NR multi-frequency layer networking provided in an embodiment of the present application;

[0011] Figure 3 This is a schematic diagram of user perception indicator interaction of NR and LTE hybrid networking provided in an embodiment of the present application;

[0012] Figure 4 It is a flow chart of another mobility management method provided in an embodiment of the present application;

[0013] Figure 5 This is a schematic diagram of mobility within the NR system provided in an embodiment of the present application;

[0014] Figure 6 It is a schematic diagram of inter-system mobility between NR and LTE provided in an embodiment of the present application;

[0015] Figure 7 It is a flow chart of another mobility management method provided in an embodiment of the present application;

[0016] Figure 8 It is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] The mobility management method, communication device and storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0020] In the related art, the mobility method based on load or channel quality is used to perform user migration between NR multi-frequency layers or NR / LTE systems, which makes it difficult to accurately improve the user perception level and cannot make up for the user perception differences between frequency layers. In order to solve the above problems, the embodiment of the present application provides a mobility management method, which obtains the second user perception index of the serving cell and at least one neighboring cell, and appropriately migrates the user equipment by comparing the user perception index, thereby improving user perception, optimizing the mobility strategy of the network system, and improving the network quality.

[0021] The technical solution provided by the embodiments of the present application is described below in conjunction with the accompanying drawings.

[0022] Figure 1 1 is a flow chart of a mobility management method provided in an embodiment of the present application. The method 100 may be executed by a communication device. Figure 1 As shown, the method mainly includes the following steps:

[0023] S101: Acquire a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell.

[0024] The technical solution provided in the embodiments of the present application can be applied to a wireless communication network, in which there may be a NR multi-frequency layer networking, or a NR and LTE hybrid networking scenario.

[0025] At least one neighboring cell in the embodiment of the present application may include a neighboring cell of a different frequency in the same system as the serving cell (which may be referred to as a neighboring cell of a different frequency within the system in the embodiment of the present application). For example, the serving cell is an NR cell, and at least one neighboring cell may include other NR neighboring cells of a different frequency from the serving cell. In addition, the at least one neighboring cell may also include a neighboring cell in a different system from the serving cell (which may be referred to as a neighboring cell of a different system in the embodiment of the present application). For example, the serving cell is an NR cell, and at least one neighboring cell may include a neighboring cell of LTE.

[0026] In the NR system, the centralized unit (CU) and distributed unit (DU) of the NR base station equipment are deployed separately. The connection between the CU and the DU is established through the 3GPP F1 standard interface, the connection between NR base stations is established through the 3GPP Xn standard interface, and the connection between the NR base station and the LTE base station is established through the NG / S1 standard interface. The second user perception indicator of the hetero-frequency or hetero-system neighboring cell can be exchanged with the serving cell through the resource status process of the F1 / Xn interface and the radio access network information management (RAN Information Management, RIM) process of NG / S1.

[0027] Therefore, in the embodiment of the present application, obtaining the second user perception indicator of at least one neighboring cell may include at least one of the following:

[0028] Acquire, through an interface between the CU and at least one DU, a second user perception indicator of each neighboring cell under the at least one DU;

[0029] Acquire, through an interface with at least one base station in the system, a second user perception indicator of each neighboring cell of the at least one base station;

[0030] Through the interface between the foreign system, the second user perception index of each neighboring cell in the foreign system is obtained.

[0031] In specific applications, the method for obtaining the above user perception indicators can be determined according to the actual application. In actual networks, there are NR multi-frequency layer networking and NR and LTE hybrid networking scenarios. For example, in Figure 2 In the NR wireless communication network, the NR base station establishes a connection through the 3GPP F1 standard interface. In the NR wireless communication network, the base station gNB consists of two parts: CU and DU. The CU and DU are connected through the F1 interface. Multiple DUs may be connected to the same CU. During the F1 establishment or configuration update process between the DU and the CU in the gNB, the cell user perception indicators under the DU are passed to the CU. In this way, through the interface between the CU and at least one DU, the second user perception indicators of each neighboring cell under this DU can be obtained.

[0032] In addition, if Figure 2 As shown, two NR base stations establish a connection through the 3GPP Xn standard interface, different base stations gNB are connected through the Xn interface, and different base stations gNB1 and gNB2 transmit the cell user perception indicators under their respective base stations to the opposite base station during the Xn link establishment process or the Xn link configuration update process. In addition, different base stations can inform the opposite base station of the cell user perception indicators under the base station through the resource status update process. Through the interface with at least one base station in the system, the second user perception indicator of each neighboring cell under at least one base station can be obtained.

[0033] The NR base station and the LTE base station are connected through the NG / S1 standard interface. Figure 3 As shown, the NR base station gNB and the LTE base station eNB realize the interaction of perception information between LTE and NR cells through the NG / S1 link, wherein the NR base station gNB communicates with the access and mobility management function (AMF) of the NR core network through the NG standard interface, and the AMF communicates with the mobility management function (MME) of the LTE core network, and the LTE base station eNB communicates with the MME through the S1 standard interface, thereby realizing the interaction of perception information between LTE and NR cells. In this way, through the interface with the heterogeneous system, the second user perception indicators of each neighboring cell under the heterogeneous system can be obtained.

[0034] In the embodiment of the present application, the second user perception indicators of the serving cell and each neighboring cell include but are not limited to: perceived uplink user throughput, perceived downlink user throughput, perceived success rate, etc.

[0035] S102: Determine a target neighboring cell that meets a target condition among the at least one neighboring cell based on the first user perception indicator and the second user perception indicator.

[0036] The target condition may include: a second user perception indicator of the target neighboring cell is greater than a first user perception indicator of the serving cell.

[0037] In an embodiment of the present application, a first user perception indicator of a service cell and a second user perception indicator of a neighboring cell of a user equipment can be evaluated, and the relationship between the first user perception indicator of the service cell and the second user perception indicator of the neighboring cell can be determined. When there is a target neighboring cell that meets the target conditions, the target user equipment of the service cell is migrated to the target neighboring cell, thereby realizing mobility management based on user perception.

[0038] Optionally, it is possible to periodically evaluate whether there is a target neighboring cell that meets the target conditions in at least one of the neighboring cells according to a predetermined period. Therefore, in S102, when the preset period is reached, it is possible to determine whether there is a target neighboring cell that meets the target conditions in the at least one neighboring cell based on the first user perception indicator of the serving cell and the second user perception indicator of at least one neighboring cell. If there is a target neighboring cell that meets the target conditions, S103 is executed to migrate the target device to the target neighboring cell.

[0039] In one implementation, the determining of the target neighboring cell that meets the target condition in the at least one neighboring cell based on the first user perception indicator and the second user perception indicator may include: when the first user perception indicator of the serving cell is greater than the baseline threshold, determining a target neighboring cell of different frequencies within the system in which the second user perception indicator of the at least one neighboring cell meets the first condition, wherein the target neighboring cell of different frequencies within the system is a neighboring cell in the same communication system as the serving cell and having a different frequency from the serving cell. For example, it may be determined based on the first user perception indicator and the second user perception indicator that the first user perception indicator of the serving cell is greater than the baseline threshold, and the second user perception indicator of the target neighboring cell of different frequencies within the system meets the first condition.

[0040] In practical applications, there are basic requirements for the performance indicators of the network to ensure that the user equipment can communicate normally, for example, the downlink is not less than 10M, it is not a poor quality cell, etc. Therefore, in the embodiment of the present application, the baseline threshold (also referred to as the baseline requirement) refers to the minimum threshold to ensure that the user equipment can communicate normally. In the above implementation, when the first user perception indicator of the serving cell is greater than the baseline threshold, if there is a target neighboring cell with a different frequency in the system that meets a higher user perception indicator, the target user equipment of the serving cell is migrated to the target neighboring cell, thereby realizing the user equipment migration operation of different cells within the same communication system, thereby improving the first user perception indicator of the serving cell and narrowing the difference in user perception indicators between frequency layers.

[0041] In the above implementation, optionally, the second user perception indicator satisfying the first condition may mean that the second user perception indicator is greater than a first threshold, wherein the first threshold is greater than the baseline threshold. For example, the perceived uplink user throughput of the target neighboring cell is greater than or equal to the first threshold, and / or the perceived downlink user throughput of the target neighboring cell is greater than or equal to the second threshold.

[0042] In this optional implementation, the condition set for a user equipment in a cell within the same communication system to migrate to a neighboring cell with a different frequency is: the perceived uplink and / or downlink UE throughput of the target neighboring cell is respectively greater than or equal to a certain threshold, wherein the first threshold and the second threshold are not necessarily the same, and the specific value is determined by the actual situation. This ensures that the target user equipment is migrated to a cell with better network quality than the existing cell.

[0043] In the above implementation, optionally, the second user perception indicator satisfying the first condition may also include that the second user perception indicator is greater than the first user perception indicator of the serving cell. For example, the perceived uplink user throughput of the target neighboring cell is greater than the perceived uplink user throughput of the serving cell, and / or the perceived downlink user throughput of the target neighboring cell is greater than the perceived downlink user throughput of the serving cell.

[0044] For example, when (user perception index of the neighboring cell - user perception index of the current cell) is greater than or equal to a certain threshold, or (user perception index of the neighboring cell - user perception index of the current cell) / user perception index of the current cell is greater than or equal to a certain threshold, the target user equipment is migrated to the target neighboring cell.

[0045] In this optional implementation, the condition for migrating a user equipment in a cell within the same communication system to a target neighboring cell with a different frequency is as follows: a second user perception indicator of the target neighboring cell is better than a first user perception indicator of a service cell to which user equipment migration is required. This ensures that the user equipment is migrated to a cell with better network quality than that of the existing service cell, thereby improving user perception.

[0046] In another implementation, the determining of the target neighboring cell that meets the target condition in the at least one neighboring cell based on the first user perception indicator and the second user perception indicator may include: when the first user perception indicator of the serving cell is less than the baseline threshold, determining a target neighboring cell of a different system whose second user perception indicator meets the second condition in the at least one neighboring cell, wherein the target neighboring cell of the different system is a neighboring cell of a different communication system from the serving cell. For example, it may be determined that the first user perception indicator of the serving cell is less than the baseline threshold and the second user perception indicator of the target neighboring cell of the different system meets the second condition based on the first user perception indicator and the second user perception indicator.

[0047] When the first user perception indicator of the serving cell is lower than the baseline threshold, it means that the performance indicator of the current network system can no longer meet the basic communication requirements. If the neighboring cell of the different system can meet the second condition, the target user equipment of the serving cell can be migrated to the neighboring cell of the different system.

[0048] Optionally, the second user perception indicator of the target neighboring cell satisfies the second condition and may include: the second user perception indicator of the target neighboring cell is greater than a second threshold, wherein the second threshold is greater than the baseline threshold. That is to say, in the case where the second user perception indicator of the neighboring cell of the heterogeneous system is higher than or equal to the baseline threshold, if the user perception indicator of the serving cell is lower than the baseline threshold, the target user equipment of the serving cell may be migrated to the neighboring cell of the heterogeneous system to enhance the user perception of the serving cell, and make full use of the network resources of the neighboring cell of the heterogeneous system to give play to the advantages of NR and LTE hybrid networking. In addition, since the user perception indicator of the serving cell is lower than the baseline threshold, in order to ensure the normal communication of the user equipment, the second threshold corresponding to the second condition for the target user equipment to migrate to the neighboring cell of the heterogeneous system may be lower than the first threshold corresponding to the above-mentioned first condition.

[0049] Optionally, the second user perception indicator of the target neighboring cell of the heterosystem being greater than the second threshold may include: the perceived uplink user throughput of the target neighboring cell being greater than or equal to a third threshold, and / or the perceived downlink user throughput of the target neighboring cell being greater than or equal to a fourth threshold.

[0050] In this optional implementation, the conditions set for the user equipment of the serving cell to migrate to the target neighboring cell of the different communication system are: the uplink and / or downlink UE throughput of the target neighboring cell is better than a certain threshold, the third threshold and the fourth threshold are not necessarily the same, and the specific values ​​are determined by the actual situation. In this way, the target user equipment can be migrated to the neighboring cell of the different system with better network quality, thereby improving user perception.

[0051] Specifically, there are more than the above two implementation methods for the user perception indicator of the target neighboring cell to meet the target conditions, and only these two typical target conditions are listed here.

[0052] S103: Migrate the target user equipment of the serving cell to the target neighboring cell.

[0053] In the embodiment of the present application, the target user equipment to be migrated may be a specific user equipment in the serving cell. For example, in one implementation, the target user equipment may include at least one of the following:

[0054] (1) A user equipment in a connected state in the serving cell; wherein the user equipment in a connected state may be a user equipment in a connected state and meeting certain conditions, for example, a user equipment in a connected state and whose measured neighboring cell meets the above-mentioned user perception condition or a user perception better condition.

[0055] (2) n user equipments with the smallest user perception indicators (e.g., perceived user throughput) in the serving cell, where n is an integer greater than 0 and less than N, and N is less than the total number of user equipments in the serving cell; selecting n user equipments with the smallest user perception indicators, so that the n user equipments with the worst user perception can be migrated to the target cell.

[0056] (3) user equipment whose user perception index (for example, perceived user throughput) in the serving cell is less than a fifth threshold; selecting user equipment whose user perception index is less than a certain threshold, so that the user equipment with poor user perception index can be migrated to the target cell.

[0057] (4) A user equipment that releases a radio resource control (RRC) connection in the serving cell. The user equipment that releases the RRC connection refers to a user equipment that is in an idle state. The user equipment that releases the RRC connection is selected so that the user equipment that releases the RRC connection can be migrated to a target neighboring cell, thereby avoiding the user equipment that currently maintains the RRC connection from being migrated to the target neighboring cell, which may cause service interruption of the user equipment.

[0058] When selecting a target user equipment, a user equipment that satisfies one of the above conditions may be selected, or a user equipment that satisfies two or more of the above conditions may be selected. For example, from the user equipments that release the RRC connection, n user equipments are selected in the order of user perception indicators from small to large, or user equipments whose user perception indicators are lower than the fifth threshold are selected.

[0059] In the implementation of the application, the selection of the target user device is related to the above-mentioned target conditions and migration operations. For example, the target user device that can be migrated to another system may have a user perception index lower than the baseline threshold. Within this range, it can be the n devices with the smallest user perception index, where n is an integer greater than 0; it can also be a user device with a threshold lower than a certain threshold, where the threshold can be lower than the baseline threshold. If it is a same-system different-frequency migration, the target user device needs to meet another condition. First, the user perception of the target user device is higher than the baseline threshold. At this time, the user device can be the n devices with the smallest user perception index, where n is an integer greater than 0.

[0060] In one implementation, migrating the target user equipment of the serving cell to the target neighboring cell includes: when the target user equipment is released, sending an RRC release message to the target user equipment, wherein the RRC release message indicates that the reselection priority of the frequency point of the target neighboring cell is higher than the reselection priority of the frequency point of the serving cell.

[0061] Optionally, the RRC release message indicating that the reselection priority of the frequency point of the target neighboring cell is higher than the reselection priority of the frequency point of the serving cell may include one of the following:

[0062] (1) The reselection priority of the frequency of the target neighboring cell in the cell reselection priority information element of the RRC release message is higher than the priority of the frequency of the serving cell; for example, in the RRC Release message, the cellReselectionPriorities information element is carried, in which the reselection priority of the inter-frequency frequency that meets the conditions is increased, and the reselection priority of the current frequency (i.e., the serving cell) is reduced, or, in the RRC Release message, the cellReselectionPriorities information element is carried, in which the reselection priority of the frequency corresponding to the neighboring cell of the heterogeneous system that meets the above target conditions is increased, and the reselection priority of the frequency corresponding to the current serving cell is reduced. In this way, when the target user equipment performs cell reselection, it can give priority to the inter-frequency frequency that meets the conditions (i.e., the target neighboring cell), and then migrate the target user equipment to the target neighboring cell.

[0063] (2) When the target neighboring cell is a neighboring cell of a different frequency within the system of the serving cell, the deprioritization type in the deprioritization request information element of the RRC release message is configured as the frequency point; for example, the RRC Release message carries a deprioritisationReq information element, and the deprioritisationType in the information element is configured as "frequency", so that the user reduces the reselection priority of the current frequency point to the lowest and preferentially resides on the different frequency point.

[0064] (3) When the target neighboring cell is a neighboring cell of a different system from the serving cell, the deprioritization type in the deprioritization request information element of the RRC release message is configured as the system identifier to which the serving cell belongs. For example, if the serving cell is an NR network, the deprioritisationReq information element is carried in the RRC Release message, and the deprioritisationType in the information element is configured as "nr", so that the user reduces the reselection priority of the current NR system to the lowest and preferentially resides on the LTE frequency point.

[0065] In the embodiment of the present application, specific users can be selected to migrate to specific hetero-frequency or hetero-system LTE neighboring cells by switching or redirecting according to the difference in perception levels between cells, and specific idle users can be selected to reside in hetero-frequency or hetero-system neighboring cells by dedicated reselection or downgrading. This perception-based mobility method can directly trigger mobility and select target neighboring cells based on perception. Compared with traditional mobility methods based on load and channel quality, it is more intuitive and effective to solve perception problems, greatly promote the balance of user perception between different frequency layers, improve the overall network utilization of NR and LTE, and improve user perception in large-capacity and high-traffic scenarios.

[0066] Figure 4 4 is a flow chart of another mobility management method provided in an embodiment of the present application. The method 400 may be executed by a communication device. Figure 4 As shown, the method mainly includes the following steps:

[0067] S401: Acquire a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell.

[0068] This step is the same as Figure 1 For details of S101, please refer to the above related description, which will not be repeated here.

[0069] S402: Determine a target neighboring cell that meets a target condition among the at least one neighboring cell based on the first user perception indicator and the second user perception indicator.

[0070] This step is the same as Figure 1 For details of S102, please refer to the above related description, which will not be repeated here.

[0071] S403: Send a measurement request to the target user equipment in a connected state, wherein the measurement request carries a measurement event.

[0072] Optionally, the measurement event may include one of the following:

[0073] (1) The measured signal quality of the inter-frequency neighboring cell in the system is higher than the measured signal quality of the serving cell by a sixth threshold;

[0074] (2) The measured signal quality of the inter-frequency neighboring cell within the system is higher than the seventh threshold;

[0075] (3) The measured signal quality of the serving cell is lower than the eighth threshold, and the measured signal quality of the inter-frequency neighboring cell in the system is higher than the ninth threshold;

[0076] (4) The measured signal quality of the heterogeneous system neighboring cell is higher than the tenth threshold; the measured signal quality of the serving cell is lower than the eleventh threshold, and the measured signal quality of the heterogeneous system neighboring cell is higher than the twelfth threshold.

[0077] In the above optional implementation method, when it is determined that the second user perception indicator of the target neighboring cell meets the target condition (i.e. triggering the perception-based target user equipment migration), a measurement request is sent to the target user equipment in the connected state, requesting the target equipment to measure the measurement event.

[0078] For example, RSRP can be selected as the measurement trigger quantity. When the target neighboring cell is a hetero-frequency neighboring cell within the system, the hetero-frequency A3 event, A4 event, or A5 event measurement of the target neighboring cell with hetero-frequency is sent to the connected target user equipment; the A3 event means that the measured RSRP of the hetero-frequency neighboring cell is higher than the measured RSRP of the serving cell by a certain threshold, that is, the measured RSRP of the hetero-frequency neighboring cell is higher than the measured RSRP of the serving cell; the A4 event measurement means that the measured RSRP of the hetero-frequency neighboring cell is higher than a certain threshold, that is, the signal quality of the hetero-frequency neighboring cell is higher than a certain threshold; the A5 event measurement means that the measured RSRP of the serving cell is lower than a certain threshold, and the measured RSRP of the hetero-frequency neighboring cell is higher than a certain threshold. If the event measurement is met, it means that the signal quality of the serving cell is poor, and the signal quality of the hetero-frequency neighboring cell is high, so the target user equipment can be considered to be migrated to the hetero-frequency neighboring cell.

[0079] When the target neighboring cell is a neighboring cell of a different system, a B1 event measurement or a B2 event measurement of the frequency of the target neighboring cell of the different system may be sent to the target user equipment in the connected state. The B1 event measurement means that the measured RSRP of the neighboring cell of the different system is higher than a certain threshold; the B2 event measurement means that the measured RSRP of the serving cell is lower than a certain threshold, and the measured RSRP of the neighboring cell of the different system is higher than a certain threshold.

[0080] In specific applications, the actual values ​​of the thresholds in the above measurement events may not be the same, and there is no necessary connection between them, which is determined by the actual situation.

[0081] S404: Receive a measurement result reported by the target user equipment in the connected state.

[0082] After receiving the measurement request, the target user equipment will measure the serving cell and the neighboring cell, and after obtaining the measurement result that meets the measurement event, report the corresponding measurement result.

[0083] S405: Select a target neighboring cell that meets the target condition from the neighboring cells whose measurement results meet the mobility condition.

[0084] In order to ensure that the second user perception indicator and signal quality of the target neighboring cell meet the requirements, a target neighboring cell that meets the target condition can be selected from the neighboring cells whose measurement results meet the mobility condition. For example, a target neighboring cell of a different frequency in the system that meets the above-mentioned better perception condition is selected, or a target neighboring cell of a different system that meets the above-mentioned user perception condition is selected.

[0085] S406: Initiate a process of switching the target user equipment to the target neighboring cell or a process of redirecting the target user equipment to the target neighboring cell.

[0086] After selecting the target neighboring cell, the target user equipment migration operation can be performed to switch the target user equipment to the target neighboring cell or redirect it to the target neighboring cell. Figure 5 In the example, the target user equipment in the connected state and the target user equipment in the idle state are migrated from the serving cell of the NR network frequency point f1 to the target neighboring cell of the NR network frequency point f2, and the base station corresponding to the frequency point f1 (gNB1) and the base station corresponding to the frequency point f2 (gNB2) can exchange user perception indicators through the XN link. Or, Figure 6 As shown, the target user equipment in the connected state and the target user equipment in the idle state are migrated from the service cell of the frequency point f1 of the NR network to the target neighboring cell corresponding to the frequency point F2 of the LTE network.

[0087] The following takes the serving cell as a cell of the NR system as an example to illustrate the technical solution provided in the embodiment of the present application.

[0088] In an embodiment of the present application, mobility management is performed between multiple frequency layers within the NR system and between NR and LTE systems based on user perception to narrow the user perception differences between multiple frequency layers, give play to the advantages of multi-frequency layer networking and NR and LTE hybrid networking, and improve network resource utilization and user perception.

[0089] In this embodiment, the average user perception indicators of cells under different frequency layers can be periodically evaluated, and the interaction of user perception indicators between cells in the NR system can be realized through the XN link between base stations, and the interaction of user perception indicators between LTE and NR cells can be realized through the NG / S1 link.

[0090] If there is a large difference in user perception between NR frequency layers, the cell with poor user perception indicators will migrate users with poor user perception indicators in the cell to the cell with better inter-frequency layer perception, thereby improving the user perception indicators of the cell, narrowing the difference in user perception indicators between frequency layers, and giving full play to the advantages of NR multi-frequency layer networking. For connected user devices, users can be switched to NR inter-frequency neighboring cells with better user perception indicators by switching. For idle users, the reselection priority of NR inter-frequency points can be increased by carrying dedicated reselection priority or downgraded priority information elements, so that users can preferentially reside in NR inter-frequency neighboring cells with better user perception indicators.

[0091] If the user perception index of the NR cell is lower than the baseline threshold, the connected users will be migrated to the LTE neighboring cell with better user perception index. At the same time, for idle users, the reselection priority of the LTE frequency point will be increased by carrying a dedicated reselection priority or downgrade information element, so that the users will be preferentially stationed in the LTE neighboring cell with better user perception index, thereby improving the user perception index of this cell, making full use of the network resources of the LTE neighboring cell, and giving full play to the advantages of NR and LTE hybrid networking.

[0092] The multi-frequency layer mobility management method based on perception includes evaluation and interaction of user perception indicators, mobility triggering decision based on user perception indicators, user selection mechanism, migration mechanism of connected users within and between systems, and migration mechanism of idle users within and between systems. Figure 7 700 is a flow chart of another mobility management method provided in an embodiment of the present application. The method 700 may be executed by a communication device, for example, by a base station corresponding to a serving cell. Figure 7 As shown, the method mainly includes the following steps:

[0093] S701: The base station side evaluates the user perception of the cell.

[0094] By evaluating the user perception of the cell, the user perception index of the service cell can be obtained.

[0095] S702: Different cells within a base station or between base stations interact with user perception indicators.

[0096] For example, the base station side can periodically evaluate the user perception indicators of the cell. The periodic interaction of user perception indicators between cells within the NR station is realized through the F1 interface, the periodic interaction of user perception indicators between cells between NR stations is realized through the XN interface, and the interaction of user perception indicators between LTE and NR is realized through the NG / S1 interface. The evaluation of user perception indicators can be characterized by but not limited to the following indicators:

[0097] 1) Cell uplink perception: Cell uplink average user throughput (UE Throughput) = Cell uplink UEThoughput data volume / Cell uplink UE Throughput data transmission time;

[0098] Among them, the cell uplink UE Throughput data volume is the amount of radio link control (Radio Link Control, RLC) service data unit (Service Data Unit, SDU) message data successfully transmitted by the cell uplink air interface, excluding the tail packet; the cell uplink UE Throughput data transmission time is the data transmission duration of the cell uplink service, excluding the tail packet.

[0099] 2) Cell downlink perception: Average UE throughput of cell downlink = cell downlink UE throughput data volume / cell downlink UE throughput data transmission time;

[0100] Among them, the cell downlink UE Throughput data volume is the RLC SDU message data volume successfully transmitted by the cell downlink air interface, excluding the tail packet; the cell downlink UE Throughput data transmission time is the online time length that the cell downlink service makes the cache in the gNodeB non-empty, excluding the tail packet.

[0101] S703: The base station side determines whether to trigger the perception-based mobility. If yes, proceed to the next step; if no, the process ends.

[0102] The base station side can periodically perform perception mobility triggering decisions based on user perception in the current cell and neighboring cells:

[0103] When the user perception index of the serving cell is better than the baseline requirement and there is an intra-system inter-frequency target neighboring cell that meets the user perception better condition (for example, the first condition mentioned above), triggering the intra-system user migration based on perception;

[0104] When the user perception index of the serving cell is lower than the baseline requirement and there is a heterogeneous LTE neighboring cell that meets the user perception condition (eg, the second condition mentioned above), perception-based heterogeneous system user migration is triggered.

[0105] The conditions for the intra-system hetero-frequency target neighboring cells and hetero-system LTE target neighboring cells are:

[0106] 1) Better conditions for sensing neighboring cells with different frequencies within the system:

[0107] a. The uplink and downlink UE Throughput of the inter-frequency NR neighboring cell is greater than or equal to a certain threshold;

[0108] b. The uplink or downlink UE Throughput of the inter-frequency NR neighboring cell is better than that of the serving cell, which is determined by the following methods including but not limited to:

[0109] For example, the better condition for the perception of the heterodyne target neighboring cell within the system may be: (the user perception index of the neighboring cell-the user perception index of the current cell) is greater than or equal to a certain threshold, or (the user perception index of the neighboring cell-the user perception index of the current cell) / the user perception index of the current cell is greater than or equal to a certain threshold;

[0110] 2) Hetero-LTE target neighboring cell perception conditions:

[0111] The uplink and downlink UE Throughput of the neighboring LTE cells of different systems is greater than or equal to a certain threshold.

[0112] S704: The base station side selects a migration UE based on the UE's perception status, and sends inter-frequency / inter-system measurements to the target UE.

[0113] The base station side may select the UE to be migrated based on the user perception indicator. For example, it may be:

[0114] 1. Selection of connected users: After the above mobility trigger judgment, if the current cell triggers the perception-based mobility migration strategy, a specific connected user in the current cell is selected as the target user for migration in the following manners, including but not limited to: selecting several users in the order of perceived UE Throughput from small to large, or selecting users whose perceived UE Throughput is lower than a certain level;

[0115] 2. Idle user selection: After the above mobility trigger judgment, if the current cell triggers the perception-based mobility migration strategy, a specific RRC connection released user in the current cell is selected as the target user for migration in the following manners, including but not limited to: selecting a number of users in the order of perceived UE Throughput from small to large, or selecting users whose perceived UE Throughput is lower than a certain level;

[0116] S705: The base station laterally migrates a connected UE to an inter-frequency / inter-system neighboring cell, and the base station laterally migrates an idle UE to an inter-frequency / inter-system neighboring cell.

[0117] For inter-frequency / inter-system migration of connected user equipment, the base station side can perform the following operations:

[0118] 1) Measurement and dispatch: If it is determined that the user migration within the system based on perception is triggered, the A3 (RSRP measured in the inter-frequency neighboring area is higher than the RSRP measured in the serving cell by a certain threshold) or A4 (RSRP measured in the inter-frequency neighboring area is higher than a certain threshold) or A5 event measurement (RSRP measured in the serving cell is lower than a certain threshold, and RSRP measured in the inter-frequency neighboring area is higher than a certain threshold) of the inter-frequency target neighboring area is dispatched to the above selected connected user. If it is determined that the user migration of the inter-system based on perception is triggered, the B1 (RSRP measured in the inter-system LTE neighboring area is higher than a certain threshold) or B2 (RSRP measured in the serving cell is lower than a certain threshold, and RSRP measured in the inter-system LTE neighboring area is higher than a certain threshold) event measurement of the LTE frequency point with the inter-system target neighboring area is dispatched to the above selected connected user.

[0119] 2) Migration execution: After the user reports the measurement, it selects an inter-frequency neighbor cell that meets the above-mentioned conditions for better perception of the inter-frequency target neighbor cell within the system, or selects an LTE neighbor cell that meets the conditions for perception of the inter-system LTE target neighbor cell, and performs switching or redirection to the neighbor cell.

[0120] For inter-frequency / inter-system migration of idle user equipment, the base station side can perform the following operations:

[0121] 1) If it is determined that the perception-based intra-system user migration is triggered, when the above-selected user equipment is released, the cellReselectionPriorities information element is carried in the RRC Release message, and the reselection priority of the inter-frequency frequency points that meet the following conditions is increased, and the reselection priority of the current frequency point is reduced; or the deprioritisationReq information element is carried in the RRC Release message, and the deprioritisationType in the information element is configured as "frequency", so that the user reduces the reselection priority of the current frequency point to the lowest and preferentially resides on the inter-frequency frequency point.

[0122] Among them, the inter-frequency frequency point condition can be: there are a certain number of neighboring cells under the frequency point that meet the conditions for better perception of the inter-frequency target neighboring cells in the system.

[0123] 2) If it is determined that the user migration between systems based on perception is triggered, when the target user selected above is released, the cellReselectionPriorities information element is carried in the RRC Release message, and the reselection priority of the inter-frequency frequency points that meet the above inter-frequency frequency point conditions or the LTE frequency points that meet the following inter-system LTE frequency point conditions is increased, and the reselection priority of the current frequency point is reduced. Or the deprioritisationReq information element is carried in the RRC Release message, and the deprioritisationType in the information element is configured as "nr", so that the user reduces the reselection priority of the current NR system to the lowest and preferentially resides on the LTE frequency point.

[0124] The heterogeneous LTE frequency point condition may be: there are a certain number of neighboring cells satisfying the heterogeneous LTE target neighboring cell perception condition under the LTE frequency point.

[0125] S706: The connected UE switches to a neighboring cell with a different frequency or system, and the idle UE reselects to a neighboring cell with a different frequency or system.

[0126] In large-capacity, high-traffic scenarios, due to the large differences in channel interference, bandwidth, and standards of each frequency layer, the user perception between different frequency layers varies greatly, resulting in insufficient utilization of the network. Traditional mobility methods are based on load and channel quality to trigger mobility decisions and target neighbor selection. Because the load and channel quality between frequency layers are indirect factors that affect user perception, traditional mobility methods are difficult to maximize user perception and fully utilize network resources.

[0127] By adopting the above method provided in the embodiment of the present application, the user perception indicators of cross-station neighboring areas and heterogeneous system neighboring areas are obtained to realize the interaction of user perception indicators between cells, providing a basis for mobility management based on user perception indicators. The interaction of user perception indicators between cells is also one of the important implementation links in the evolution of wireless communication networks to "synesthesia integration". In addition, in the embodiment of the present application, according to the difference in perception levels between cells, specific users are selected to migrate to specific heterogeneous frequency or heterogeneous system LTE neighboring areas by switching or redirecting, and specific idle users are selected to reside in heterogeneous frequency or heterogeneous system neighboring areas by dedicated reselection or downgrading. This mobility method based on perception can directly trigger mobility and select target neighboring areas with user perception indicators as the target. Compared with the traditional mobility method based on load and channel quality, it is more intuitive and effective to solve the perception problem, promote the balance of user perception indicators between different frequency layers, improve the utilization rate of the overall network of NR and LTE, and improve the user perception indicators in large-capacity and high-traffic scenarios.

[0128] Optional, such as Figure 8As shown, an embodiment of the present application also provides a communication device 800, including a processor 801 and a memory 802, a program or instruction stored in the memory 802 and executable on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction is executed by the processor 801 to implement the various processes of the above-mentioned mobility management method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0129] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned mobility management method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0130] The processor may be a processor in a terminal or a network side device as described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0131] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run network-side device programs or instructions to implement the various processes of the above-mentioned mobility management method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0132] A computer program product is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the various processes of the above-mentioned mobility management method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0133] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0134] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A mobility management method, characterized in that: include: Acquire a first user perception indicator of a serving cell and a second user perception indicator of at least one neighboring cell; Based on the first user perception indicator and the second user perception indicator, determining a target neighboring cell that meets a target condition among the at least one neighboring cell, wherein the target condition includes: the second user perception indicator of the target neighboring cell is greater than the first user perception indicator of the serving cell; Migrate the target user equipment of the serving cell to the target neighboring cell.

2. The method according to claim 1, characterized in that The determining, based on the first user perception indicator and the second user perception indicator, a target neighboring cell that meets a target condition among the at least one neighboring cell includes: When the first user perception indicator of the serving cell is greater than the baseline threshold, determine a target neighboring cell with different frequencies within the system whose second user perception indicator among the at least one neighboring cell satisfies the first condition, wherein the target neighboring cell with different frequencies within the system is a neighboring cell that is in the same communication system as the serving cell and has a frequency different from that of the serving cell.

3. The method according to claim 2, characterized in that The second user perception indicator satisfies the first condition, including: The second user perception index is greater than a first threshold, wherein the first threshold is greater than the baseline threshold; or The second user perception indicator is greater than the first user perception indicator of the serving cell.

4. The method according to claim 1, characterized in that The determining, based on the first user perception indicator and the second user perception indicator, a target neighboring cell that meets a target condition among the at least one neighboring cell includes: When the first user perception indicator of the serving cell is less than the baseline threshold, determine a target neighboring cell of a different system whose second user perception indicator satisfies a second condition among the at least one neighboring cell, wherein the target neighboring cell of the different system is a neighboring cell of a communication system different from that of the serving cell.

5. The method according to claim 4, characterized in that The second user perception indicator satisfies the second condition, including: The second user perception index is greater than a second threshold, wherein the second threshold is greater than the baseline threshold.

6. The method according to claim 1, characterized in that The target user equipment includes at least one of the following: A user equipment in a connected state in the serving cell; n user equipments with the smallest user perception indicators in the serving cell, where n is an integer greater than 0 and less than N, and N is less than the total number of user equipments in the serving cell; A user equipment in the serving cell whose user perception index is less than a third threshold; A user equipment releasing a radio resource control (RRC) connection in the serving cell.

7. The method according to any one of claims 1 to 6, characterized in that: Migrating the target user equipment of the serving cell to a target neighboring cell includes: Sending a measurement request to the target user equipment in a connected state, wherein the measurement request carries a measurement event; Receiving a measurement result reported by the target user equipment in the connected state; Selecting a target neighboring cell that meets the target condition from the neighboring cells whose measurement results meet the mobility condition; A process of switching the target user equipment to the target neighboring cell or a process of redirecting the target user equipment to the target neighboring cell is initiated.

8. The method according to claim 7, characterized in that The measurement event includes one of the following: The measured signal quality of the inter-frequency neighboring cell in the system is higher than the measured signal quality of the serving cell by a sixth threshold; The measured signal quality of the inter-frequency adjacent cell in the system is higher than the seventh threshold; The measured signal quality of the serving cell is lower than the eighth threshold, and the measured signal quality of the inter-frequency neighboring cell in the system is higher than the ninth threshold; The measured signal quality of the neighboring cell of the heterogeneous system is higher than the tenth threshold; The measured signal quality of the serving cell is lower than the eleventh threshold, and the measured signal quality of the heterogeneous system neighboring cell is higher than the twelfth threshold.

9. The method according to any one of claims 1 to 6, characterized in that: Migrating the target user equipment of the serving cell to a target neighboring cell includes: In case that the target user equipment is released, an RRC release message is sent to the target user equipment, wherein the RRC release message indicates that the reselection priority of the frequency point of the target neighboring cell is higher than the reselection priority of the frequency point of the serving cell.

10. The method according to claim 9, characterized in that The RRC release message indicates that the reselection priority of the frequency of the target neighboring cell is higher than the reselection priority of the frequency of the serving cell, including one of the following: The reselection priority of the frequency of the target neighboring cell in the cell reselection priority information element of the RRC release message is higher than the priority of the frequency of the serving cell; In a case where the target neighboring cell is a neighboring cell of different frequencies within the system of the serving cell, the priority reduction type in the priority reduction request information element of the RRC release message is configured as a frequency point; In the case where the target neighboring cell is a neighboring cell of a different system from the serving cell, the priority reduction type in the priority reduction request information element of the RRC release message is configured as the system identifier to which the serving cell belongs.

11. The method according to any one of claims 1 to 6, characterized in that: Acquiring a second user perception indicator of at least one neighboring cell includes at least one of the following: Acquire, through an interface between a centralized unit CU and at least one distributed unit DU, a second user perception indicator of each neighboring cell under the at least one DU; Acquire, through an interface with at least one base station in the system, a second user perception indicator of each neighboring cell of the at least one base station; Through the interface between the foreign system, the second user perception index of each neighboring cell in the foreign system is obtained.

12. The method according to any one of claims 1 to 6, characterized in that: The determining, based on the first user perception indicator and the second user perception indicator, a target neighboring cell that meets a target condition among the at least one neighboring cell includes: When the preset period arrives, a target neighboring cell that meets the target condition among the at least one neighboring cell is determined based on the first user perception indicator and the second user perception indicator.

13. The method according to any one of claims 1 to 6, characterized in that: The second user perception indicator of the neighboring cell includes at least one of the following: the perceived uplink user throughput of the neighboring cell, the perceived downlink user throughput of the target neighboring cell, and the perception success rate of the target neighboring cell; The first user perception indicator of the serving cell includes at least one of the following: a perceived uplink user throughput of the serving cell, a perceived downlink user throughput of the serving cell, and a perceived success rate of the serving cell.

14. A communication device, characterized in that: The communication device includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the mobility management method according to any one of claims 1 to 13 is implemented.

15. A readable storage medium, characterized in that: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the mobility management method according to any one of claims 1 to 14 is implemented.

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