CN109862595B

CN109862595B - Directional switching method and system

Info

Publication number: CN109862595B
Application number: CN201910205025.8A
Authority: CN
Inventors: 杨文聪; 冯毅; 王友祥
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2021-07-13
Anticipated expiration: 2039-03-18
Also published as: CN109862595A

Abstract

The embodiment of the invention provides a directional switching method and a directional switching system, relates to the field of communication cell switching, and can improve the cell switching efficiency and save signaling consumption. The method comprises the following steps: acquiring capability information of a terminal accessed to a cell managed by a first base station and a neighboring cell list of the terminal; when the terminal is determined to support NSA networking and the first base station does not support NSA networking, generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal, so that the terminal measures corresponding adjacent cells to obtain a first measurement report and a second measurement report; generating an access switching instruction according to the first measurement report, and generating an auxiliary station adding instruction according to the second measurement report; and respectively sending the access switching instruction and the auxiliary station adding instruction to the terminal and the first target cell so as to enable the terminal to be accessed into the first target cell, and simultaneously adding a second target base station to which a second target cell belongs as an auxiliary station by the first target cell.

Description

Directional switching method and system

Technical Field

The present invention relates to the field of communication cell handover, and in particular, to a directional handover method and system.

Background

In the initial stage of network establishment of the 5G network, a Non-independent (NSA) networking scheme is adopted, and specifically, the Non-independent networking refers to that a control plane (4G carries control signaling) is independently deployed by 4G, a user plane (5G and 4G carry user plane data) is commonly deployed by 5G and 4G, or a user plane is independently deployed by 5G (only 5G carries user plane data). However, in practice, not all LTE (Long Term Evolution) cells are NSA cells, and when an NSA terminal accesses a non-NSA LTE cell, the NSA terminal has only LTE one-sided user experience, and cannot embody the advantages of the 5G network, so that a policy for implementing directional handover exists in the non-NSA LTE cell, so that the NSA terminal can be handed over from the non-NSA LTE cell to the NSA LTE cell when the terminal is located in both a non-NSA LTE cell coverage range and an NASLTE cell, and thus, the NSA terminal can enjoy the large-capacity user experience brought by 5G. The current realization technology is as follows: when an NSA terminal accesses to an LTE cell which is not NSA, the NSA terminal is firstly switched to the LTE cell supporting NSA through the measurement of an A3 event, then, in the LTE cell supporting NSA, a secondary station 5G base station gNB is added through the measurement of a B1 event, and the NSA terminal finally experiences the capacity of two sides of LTE and NR (New radio). However, when the terminal accesses from the non-NSA LTE, the measurement is performed once, the handover in the LTE system is performed, the measurement of the different systems is performed again, and the secondary station is added, so that the measurement one by one is relatively long, and the time for the user to perceive badly is relatively long.

Disclosure of Invention

The embodiment of the invention provides a directional switching method, which is used for improving the efficiency of communication cell switching.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a directional handover method is provided, which is applied to a first base station, and includes:

acquiring capability information of a terminal accessed to a cell managed by a first base station and an adjacent cell list of the cell accessed by the terminal; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of a cell accessed by at least one terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking;

when the terminal is determined to support NSA networking and not to support NSA networking, generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to an adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell;

the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of a cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, and the communication system of a second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking;

the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list includes at least one code of a first neighbor cell, and the second neighbor cell list includes at least one code of a second neighbor cell;

generating an access switching instruction according to a first measurement report which is returned by the terminal and obtained by measuring the first adjacent cell, and generating a secondary station adding instruction according to a second measurement report which is returned by the terminal and obtained by measuring the second adjacent cell;

sending an access switching instruction to a terminal so as to switch the access of the terminal to a first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event;

sending an auxiliary station adding instruction to a first target base station to which a first target cell belongs so that the first target base station adds a second target base station to which a second target cell belongs as an auxiliary station; the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell.

In the directional switching method provided in the foregoing embodiment, when a terminal and a base station corresponding to a cell in which the terminal is located both support NAS networking, first, a first adjacent cell that can be used for switching and a second adjacent cell that can be added as a secondary station are determined according to a communication system of an adjacent cell of the cell in which the terminal is located and a condition that whether a first base station to which the first base station belongs supports NAS networking, where the communication system of a cell to which the terminal is accessed and the communication system of the first adjacent cell are a first communication system, the communication system of the second adjacent cell is a second communication system, and both the base station to which the first adjacent cell belongs and the base station to which the second adjacent cell belongs both support NAS networking; then, corresponding measurement control messages, namely a first adjacent cell measurement control message and a second adjacent cell measurement control message, are issued to the terminal, so that the terminal performs corresponding measurement on the first adjacent cell to obtain a first measurement report, and performs corresponding measurement on the second adjacent cell to obtain a second measurement report; after receiving a first measurement report and a second measurement report returned by a terminal, a first base station to which a cell currently accessed by the terminal belongs determines a first target cell for switching and a second target base station corresponding to a second target cell used as an auxiliary station from the measurement reports, so as to generate an access switching instruction for indicating the first target cell and an auxiliary station adding instruction for indicating the second target base station, and then the two instructions are respectively sent to the terminal and the first target base station to which the first target cell belongs, so that the terminal is switched to the first target cell while the first target base station adds the second target base station as the auxiliary station, and thus the terminal can enjoy communication capacities of two different communication systems simultaneously, and user experience is improved; in the whole process of the directional switching, the terminal simultaneously measures a first adjacent cell using the first communication system and managed by the base station supporting the NAS networking and a second adjacent cell using the second communication system and managed by the base station supporting the NAS networking in the cell using the first communication system and managed by the base station supporting the NAS networking, so that the access of the terminal can be directly switched after the measurement is completed, the consumption of signaling is saved, and the time delay of the directional switching is also saved.

In a second aspect, a first base station is provided, including: the device comprises an acquisition module, a judgment module, a processing module and a sending module;

an obtaining module, configured to obtain capability information of a terminal accessing a cell managed by a first base station and a neighboring cell list of the cell to which the terminal accesses; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of a cell accessed by at least one terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking;

when the judging module determines that the terminal supports NSA networking and determines that the first base station does not support NSA networking according to the capability information of the terminal acquired by the acquiring module, the processing module is used for generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the adjacent cell list acquired by the acquiring module;

the sending module is used for sending the first adjacent cell measurement control message and the second adjacent cell measurement control message generated by the processing module to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell;

the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of a cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, and the communication system of a second adjacent cell is a second communication system; the second communication system at least has the transmission rate and the communication bandwidth higher than the first communication system, and the transmission delay of the second communication system is lower than the first communication system; the second base station and the third base station both support NSA networking;

the acquisition module is used for acquiring a first measurement report obtained by measuring a first adjacent cell and a second measurement report obtained by measuring a second adjacent cell, which are returned by the terminal;

the processing module is further used for generating an access switching instruction according to the first measurement report acquired by the acquisition module and generating an auxiliary station adding instruction according to the second measurement report acquired by the acquisition module;

the sending module is further configured to send the access switching instruction generated by the processing module to the terminal, so that the access of the terminal is switched to the first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event;

the sending module is further configured to send the secondary station adding instruction generated by the processing module to a first target base station to which the first target cell belongs, so that the first target base station adds a second target base station of a second target cell as a secondary station; the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell.

In a third aspect, a terminal is provided, including: the device comprises a sending module, a receiving module and a processing module;

a sending module, configured to send capability information of a terminal to a first base station to which a cell to which the terminal accesses belongs; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not;

the receiving module is used for receiving a first adjacent cell measurement control message and a second adjacent cell measurement control message sent by a first base station; the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of a cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, and the communication system of a second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking; the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list comprises codes of at least one first neighbor cell and the second neighbor cell list comprises codes of at least one second neighbor cell;

the processing module is used for measuring the first adjacent cell and the second adjacent cell according to the first adjacent cell measurement control message and the second adjacent cell measurement control message received by the receiving module so as to obtain a first measurement report containing the measurement result of the first adjacent cell and a second measurement report containing the measurement result of the second adjacent cell;

the sending module is further configured to send the first measurement report and the second measurement report to the first base station, so that the first base station generates an access switching instruction according to the first measurement report, and generates an auxiliary station adding instruction according to the second measurement report;

the receiving module is also used for receiving an access switching instruction sent by the first base station;

the processing module is also used for controlling the terminal to access the first target cell according to the access switching instruction received by the receiving module; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event.

In a fourth aspect, a base station is provided, which includes a receiving module and a processing module;

the receiving module is used for receiving an auxiliary station adding instruction sent by another base station;

the processing module is used for adding another base station as the auxiliary station according to the auxiliary station adding instruction received by the receiving module;

the other base station is a base station which does not support NAS networking, and the base station and the other base station are both base stations which support NAS networking;

the first cell managed by the base station is of a first communication system, the second cell managed by the base station is of a second communication system, and the coverage areas of the first cell and the second cell are the same.

In a fifth aspect, a directional switching system is provided, which includes the first base station provided in the second aspect, the terminal provided in the third aspect, and the base station provided in the fourth aspect.

The directional switching method and system provided by the embodiment of the invention comprise the following steps: acquiring capability information of a terminal accessed to a cell managed by a first base station and an adjacent cell list of the cell accessed by the terminal; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of a cell accessed by at least one terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking; when the terminal is determined to support NSA networking and support NSA networking, generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to an adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell; the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of a cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, and the communication system of a second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking; the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list includes at least one code of a first neighbor cell, and the second neighbor cell list includes at least one code of a second neighbor cell; generating an access switching instruction according to a first measurement report which is returned by the terminal and obtained by measuring the first adjacent cell, and generating a secondary station adding instruction according to a second measurement report which is returned by the terminal and obtained by measuring the second adjacent cell; sending an access switching instruction to a terminal so as to switch the access of the terminal to a first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event; sending an auxiliary station adding instruction to a first target base station to which a first target cell belongs so that the first target base station adds a second target base station to which a second target cell belongs as an auxiliary station; the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell.

When a terminal and a base station corresponding to a cell in which the terminal is located both support NAS networking, first determining a first adjacent cell that can be used for switching and a second adjacent cell that can be added as a secondary station according to a communication system of the adjacent cell of the cell in which the terminal is located and a condition that whether a first base station to which the first base station belongs supports NAS networking, where the communication system of the cell to which the terminal is accessed and the first adjacent cell is a first communication system, the communication system of the second adjacent cell is a second communication system, and both the base station to which the first adjacent cell belongs and the base station to which the second adjacent cell belongs both support NAS networking; then, corresponding measurement control messages, namely a first adjacent cell measurement control message and a second adjacent cell measurement control message, are issued to the terminal, so that the terminal performs corresponding measurement on the first adjacent cell to obtain a first measurement report, and performs corresponding measurement on the second adjacent cell to obtain a second measurement report; after receiving a first measurement report and a second measurement report returned by a terminal, a first base station to which a cell currently accessed by the terminal belongs determines a first target cell for switching and a second target base station corresponding to a second target cell used as an auxiliary station from the measurement reports, so as to generate an access switching instruction for indicating the first target cell and an auxiliary station adding instruction for indicating the second target base station, and then the two instructions are respectively sent to the terminal and the first target base station to which the first target cell belongs, so that the terminal is switched to the first target cell while the first target base station adds the second target base station as the auxiliary station, and thus the terminal can enjoy communication capacities of two different communication systems simultaneously, and user experience is improved; in the whole process of the directional switching, the terminal simultaneously measures a first adjacent cell using the first communication system and managed by the base station supporting the NAS networking and a second adjacent cell using the second communication system and managed by the base station supporting the NAS networking in the cell using the first communication system and managed by the base station supporting the NAS networking, so that the access of the terminal can be directly switched after the measurement is completed, the consumption of signaling is saved, and the time delay of the directional switching is also saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an alternative scheme of non-independent networking provided by the prior art;

fig. 2 is a schematic diagram of a networking scenario provided in the prior art;

fig. 3 is a schematic flow chart of a directional handover method according to an embodiment of the present invention;

fig. 4 is an addition signaling interaction diagram of an LTE base station adding a 5G base station as a secondary station in the prior art;

fig. 5 is a flowchart illustrating a directional handover method according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first base station according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a directional switching system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

It should be noted that, in the embodiments of the present invention, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that, when the difference is not emphasized, the intended meaning is consistent.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.

In 4G network, coverage areas of adjacent cells are overlapped, such as a cell a and a cell B in fig. 2, so that a terminal can initially access from the cell a or the cell B, in an initial stage of 5G network establishment, an option3X architecture (fig. 1) of NSA is adopted, an option3X architecture is adopted, that is, no signaling plane exists at an NR side, no independent work is available, and the terminal needs to work by means of LTE, LTE is an anchor point of signaling, NR is an anchor point of a user plane (in fig. 1, a dotted line is user plane connection, and a solid line is control plane connection), and NR signaling is completed through an X2 port by means of LTE assistance. The current planning is that LTE cells and NR cells under the option3x architecture are covered by the same cell, such as LTE cell B and NR cell C in fig. 2, so that the current network has the coexistence of the cells in fig. 2: cell a of LTE is not upgraded to a version supporting NSA, only LTE is supported, and LTE is a non-NSA LTE cell, whereas cell B of LTE is upgraded to a version supporting NSA, and supports NSA architecture, cell B is an NSA LTE cell, and meanwhile, cell C of NR and LTE cell B are co-covered.

In the prior art, in order to enable a terminal supporting NAS networking, that is, an NAS terminal, to fully enjoy the advantages of a 5G signal, when the NAS terminal is powered on to access, if the terminal is first accessed to a cell a, the cell a does not support an NSA architecture, so that even if the terminal supports NSA, the terminal at this time can only operate on LTE and cannot exert the advantages of the NSA terminal, and is connected to a 5G NR cell, therefore, a base station device of LTE is required to implement a strategy of directional handover, the base station of the cell a determines whether the accessed terminal is an NSA terminal according to UE capability reported by the terminal, if so, sends a measurement control message for performing a3 event measurement on an adjacent cell supporting NSA of the cell a to the terminal, after the terminal has measured and reported a measurement report, the base station to which the cell a belongs switches the access of the terminal from the cell a to the cell B, and the base station of the cell B determines that the terminal supports NSA according to the terminal capability uploaded by the terminal, then, a measurement control message for performing B1 event measurement on the adjacent cell of the A cell of the heterogeneous system supporting NAS is sent to the terminal, and when the terminal detects the NR cell C, a secondary station adding flow is triggered to complete the option3x architecture, so that the terminal can enjoy the capacities of the 4G side and the 5G side at the same time, and good user perception is obtained.

However, the original scheme has the following defects:

1. the measurement of the event A3 and the measurement of the event B1 are one after another, if the measurement report of the event A3 is uploaded, the terminal is switched from the LTE cell A which does not support NAS to the cell B which supports NASSTE, and then the measurement of the event B1 does not find the NR cell C which supports NAS and meets the requirement, namely the NR cell C which is the same as the LTE cell B in coverage does not exist or exists but cannot be connected with the LTE cell B, at this time, the event A is not added to the 5G auxiliary station, the architecture construction of the option3x cannot be completed, and the terminal cannot enjoy the large-capacity service of the 5G air interface; and because this switching process is added, the waste of signaling resources and the switching of data services are caused.

2. Because the measurement control message of the A3 event and the measurement control message of the B1 event are serial, the total time consumed for the terminal to access to the terminal under the option3x architecture is the measurement delay of A3 + the handover delay in the LTE system + the measurement delay of B1 + the added delay of the secondary station, which is long, and the user perception is poor.

In order to solve the above problem, referring to fig. 3, an embodiment of the present invention provides a directional handover method, applied to a first base station, including:

301. the method includes the steps of obtaining capability information of a terminal accessing a cell managed by a first base station and a neighbor cell list of the cell accessed by the terminal.

The capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of a cell accessed by at least one terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking.

Specifically, in practice, the neighbor cell list may be pre-stored in the first base station, or may be obtained from other base stations near the first base station during handover.

302. And judging whether the terminal supports NAS networking or not according to the capability information of the terminal.

If the terminal supports NAS networking, 303 is executed; and if the terminal does not support NAS networking, ending the switching process.

303. And judging whether the first base station supports NAS networking.

If the first base station is determined not to support NAS networking, 304 is executed; and if the first base station supports NAS networking, ending the process, wherein the terminal works in an LTE network and a 5G network at the moment.

304. And generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell.

the second communication system at least has the transmission rate and the communication bandwidth higher than the first communication system, and the transmission delay of the second communication system is lower than the first communication system; in practice, directional handover of a cell is generally applied to an LTE network and a 5G network, so that the second communication system refers to 5G, and the first communication system refers to LTE or 4G;

the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list includes at least one code of a first neighbor cell and the second neighbor cell list includes at least one code of a second neighbor cell.

Illustratively, the first neighbor cell measurement event is an a3 event, and the second neighbor cell measurement event is a B1 event (preferred) or a B2 event; the first neighbor cell measurement parameter includes: information of a frequency point to be measured, a size of a bandwidth to be measured, and a measurement target (Reference Signal Receiving Power, Reference Signal Receiving Quality, RSRP) or RSRQ (Reference Signal Receiving Quality)).

In practice, the measurement events of the LTE system are mainly intra-system measurement events (a1, a2, A3, a4, and a5) and inter-system measurement events (B1 and B2):

event A1: indicating that the serving cell signal quality is above a certain threshold; the service cell refers to the cell to which the terminal is currently accessed

Event A2: indicating that the serving cell signal quality is below a certain threshold;

event A3: the quality of the adjacent cell is higher than that of the service cell, and the method is used for the same-frequency and different-frequency switching based on coverage;

event A4: the quality of the adjacent region is higher than a certain threshold, and the adjacent region is used for switching based on load and can be used for load balancing;

event A5: the quality of the service cell is lower than a certain threshold and the quality of the adjacent cell is higher than a certain threshold, and the method can be used for load balancing; inter-system measurement events:

b1 event: the quality of the adjacent cell is higher than a certain threshold, and the adjacent cell is used for measuring the inter-system cell with high priority;

b2 event: the quality of the service cell is lower than a certain threshold, and the quality of the adjacent cell is higher than a certain threshold, and the method is used for measuring the different system cells with the same or lower priority.

305. And generating an access switching instruction according to a first measurement report which is returned by the terminal and obtained by measuring the first adjacent cell, and generating a secondary station adding instruction according to a second measurement report which is returned by the terminal and obtained by measuring the second adjacent cell.

3061. And sending an access switching instruction to the terminal so as to switch the access of the terminal to the first target cell.

Wherein the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event.

3062. And sending the auxiliary station adding instruction to a first target base station to which the first target cell belongs so that the first target base station adds a second target base station to which the second target cell belongs as an auxiliary station.

And the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage ranges of the first target cell and the second target cell are the same.

For example, taking the first target base station as an LTE base station and the second target base station as an NR base station, referring to fig. 4, the adding process for the LTE base station secondary station includes:

1. the LTE base station MN sends a gnnb Addition Request (SgNB Addition Request) to the NR base station SN.

2. The SN prepares transmission resources and air interface resources, and replies a Request acknowledgement message (SgNB Additon Request acknowledgement) from the gNB after the preparation is completed, wherein the Request acknowledgement message comprises air interface configuration of the SN.

3. The MN sends the air interface configuration information of the SN to the terminal in the form of a Radio Resource Control (RRC) Connection reconfiguration message (RRC Connection reconfiguration).

4. The terminal UE replies a radio resource control Connection reconfiguration Complete (RRC Connection reconfiguration Complete) message to the SN.

5. The SN sends a Reconfiguration Complete (SgNB Reconfiguration Complete) message from the gbb to the MN.

6. And carrying out random access between the terminal UE and the SN.

7-12, converting the ERAB of the S1 interface from the LTE side to the NR side through an ERAB (Evolved Radio Access Bearer) Modification indication Modification and ERAB Modification confirmation message, and completing the adding process of the secondary station; the specific process is shown in the figure and is not described herein again.

Referring to fig. 5, an embodiment of the present invention further provides a directional switching method, which is complementary to the technical solution provided by the foregoing embodiment, and includes:

501. the method includes the steps of obtaining capability information of a terminal accessing a cell managed by a first base station and a neighbor cell list of the cell accessed by the terminal.

502. And judging whether the terminal supports NAS networking or not according to the capability information of the terminal.

If the terminal supports NAS networking, 503 is executed; and if the terminal does not support NAS networking, ending the switching process.

503. And judging whether the first base station supports NAS networking.

If the first base station is determined not to support NAS networking, 504 is executed; and if the first base station supports NAS networking, ending the process, wherein the terminal works in an LTE network and a 5G network at the moment.

5041. And selecting a first adjacent cell and a second adjacent cell from the adjacent cell list according to the capability information of each adjacent cell in the adjacent cell list and generating a first adjacent cell list and a second adjacent cell list.

5042. And generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the first adjacent cell list and the second connected cell list.

5043. And sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell.

505. And setting a timer to start timing.

506. And judging whether the first measurement report and the second measurement report returned by the terminal are acquired within the upper limit of the timer.

If the first measurement report and the second measurement report returned by the terminal are obtained, namely within the upper limit of the timer, 507 is executed; and if not, only obtaining the first adjacent cell measurement report returned by the terminal, or only obtaining the second adjacent cell measurement report returned by the terminal, or not obtaining any one of the first adjacent cell measurement report and the second adjacent cell measurement report returned by the terminal, in the upper limit of the timer.

In practice, the terminal generally returns a measurement report within a short time, and if there is a measurement problem or the terminal cannot measure, the terminal cannot return the measurement report, and in the embodiment of the present invention, two measurement reports must be used simultaneously, so steps 505 and 506 are required to avoid waiting for another measurement report for a long time when only one measurement report is received.

507. And generating an access switching instruction according to the first measurement report, and generating a secondary station adding instruction according to the second measurement report.

Post 507 execution 509(5091 and 5092).

508. And judging that the times of resending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal are more than or equal to the preset times.

If yes, ending the flow; if not, 5043 is performed.

Because there may be some measurement failure in practice or a certain area indeed cannot realize the 5G network use of the NAS terminal, it is impossible to repeatedly test the terminal all the time, and it is necessary to set an upper limit of the test times, i.e. the preset number, which is generally three times; it should be noted that, returning 5043 from 508 every time is to resend the first neighbor cell measurement control message and the second neighbor cell measurement control message.

5091. And sending an access switching instruction to the terminal so as to switch the access of the terminal to the first target cell.

5092. And sending the auxiliary station adding instruction to a first target base station to which the first target cell belongs so that the first target base station adds a second target base station to which the second target cell belongs as an auxiliary station.

The directional switching method and system provided by the embodiment of the invention comprise the following steps: acquiring capability information of a terminal accessed to a cell managed by a first base station and an adjacent cell list of the cell accessed by the terminal; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of a cell accessed by at least one terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking; when the terminal is determined to support NSA networking and support NSA networking, generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to an adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell; the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of a cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, and the communication system of a second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking; the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list includes at least one code of a first neighbor cell, and the second neighbor cell list includes at least one code of a second neighbor cell; generating an access switching instruction according to a first measurement report which is returned by the terminal and obtained by measuring the first adjacent cell, and generating a secondary station adding instruction according to a second measurement report which is returned by the terminal and obtained by measuring the second adjacent cell; sending an access switching instruction to a terminal so as to switch the access of the terminal to a first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event; sending an auxiliary station adding instruction to a first target base station to which a first target cell belongs so that the first target base station adds a second target base station to which a second target cell belongs as an auxiliary station; the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell. When a terminal and a base station corresponding to a cell in which the terminal is located both support NAS networking, first determining a first adjacent cell that can be used for switching and a second adjacent cell that can be added as a secondary station according to a communication system of the adjacent cell of the cell in which the terminal is located and a condition that whether a first base station to which the first base station belongs supports NAS networking, where the communication system of the cell to which the terminal is accessed and the first adjacent cell is a first communication system, the communication system of the second adjacent cell is a second communication system, and both the base station to which the first adjacent cell belongs and the base station to which the second adjacent cell belongs both support NAS networking; then, corresponding measurement control messages, namely a first adjacent cell measurement control message and a second adjacent cell measurement control message, are issued to the terminal, so that the terminal performs corresponding measurement on the first adjacent cell to obtain a first measurement report, and performs corresponding measurement on the second adjacent cell to obtain a second measurement report; after receiving a first measurement report and a second measurement report returned by a terminal, a first base station to which a cell currently accessed by the terminal belongs determines a first target cell for switching and a second target base station corresponding to a second target cell used as an auxiliary station from the measurement reports, so as to generate an access switching instruction for indicating the first target cell and an auxiliary station adding instruction for indicating the second target base station, and then the two instructions are respectively sent to the terminal and the first target base station to which the first target cell belongs, so that the terminal is switched to the first target cell while the first target base station adds the second target base station as the auxiliary station, and thus the terminal can enjoy communication capacities of two different communication systems simultaneously, and user experience is improved; in the whole process of the directional switching, the terminal simultaneously measures a first adjacent cell using the first communication system and managed by the base station supporting the NAS networking and a second adjacent cell using the second communication system and managed by the base station supporting the NAS networking in the cell using the first communication system and managed by the base station supporting the NAS networking, so that the access of the terminal can be directly switched after the measurement is completed, the consumption of signaling is saved, and the time delay of the directional switching is also saved.

Referring to fig. 6, an embodiment of the present invention further provides a first base station 10, including: the device comprises an acquisition module 11, a judgment module 12, a processing module 13 and a sending module 14;

an obtaining module 11, configured to obtain capability information of a terminal 03 accessing a cell managed by a first base station 10 and a neighboring cell list of the cell accessed by the terminal 03; the capability information of the terminal 03 is at least used for indicating whether the terminal 03 supports non-independent NSA networking; the adjacent cell list includes codes of adjacent cells of a cell accessed by at least one terminal 03 and capability information of each adjacent cell, and the capability information of the adjacent cells is at least used for indicating a communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking;

when the judging module 12 determines that the terminal 03 supports NSA networking and determines that the first base station 10 does not support NSA networking, the processing module 13 is configured to generate a first neighbor cell measurement control message and a second neighbor cell measurement control message according to the neighbor cell list acquired by the acquiring module 11;

a sending module 14, configured to send the first neighboring cell measurement control message and the second neighboring cell measurement control message generated by the processing module 13 to the terminal 03, so that the terminal 03 measures the first neighboring cell and the second neighboring cell;

the first adjacent cell belongs to a cell managed by the second base station in the adjacent cells of the cell accessed by the terminal 03, and the second adjacent cell belongs to a cell managed by the third base station in the adjacent cells of the cell accessed by the terminal 03; the communication system of the cell accessed by the terminal 03 and the first adjacent cell is a first communication system, and the communication system of the second adjacent cell is a second communication system; the second communication system at least has the transmission rate and the communication bandwidth higher than the first communication system, and the transmission delay of the second communication system is lower than the first communication system; the second base station and the third base station both support NSA networking;

an obtaining module 11, configured to obtain a first measurement report obtained by measuring a first neighboring cell and a second measurement report obtained by measuring a second neighboring cell, which are returned by the terminal 03;

the processing module 13 is further configured to generate an access switching instruction according to the first measurement report acquired by the acquisition module 11, and generate an auxiliary station adding instruction according to the second measurement report acquired by the acquisition module 11;

the sending module 14 is further configured to send the access switching instruction generated by the processing module 13 to the terminal 03, so that the access of the terminal 03 is switched to the first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event;

the sending module 14 is further configured to send the secondary station adding instruction generated by the processing module 13 to the first target base station 01 to which the first target cell belongs, so that the first target base station 01 adds the second target base station 02 of the second target cell as a secondary station; the second target cell is a second adjacent cell meeting a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell. The first target base station 01 is any one of the second base stations, and the second target base station 02 is any one of the third base stations.

Optionally, the processing module 13 is specifically configured to:

selecting a first adjacent cell and a second adjacent cell from the adjacent cell list acquired by the acquisition module 11 according to the capability information of each adjacent cell in the adjacent cell list acquired by the acquisition module 11 and generating a first adjacent cell list and a second adjacent cell list;

and generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the first adjacent cell list and the second connected cell list.

Optionally, a timer 15 is further included;

the timer 15 is configured to start timing after the sending module 14 sends the first neighboring cell measurement control message and the second neighboring cell measurement control message generated by the processing module 13 to the terminal 03, and when the obtaining module 11 receives a first measurement report and a second measurement report returned by the terminal 03 within a timing upper limit of the timer 15, the processing module 13 is configured to generate an access switching instruction according to the first measurement report obtained by the obtaining module 11, and generate a secondary station adding instruction according to the second measurement report obtained by the obtaining module 11.

Optionally, when the obtaining module 11 obtains only the first neighbor cell measurement report returned by the terminal 03, or obtains only the second neighbor cell measurement report returned by the terminal 03, or does not obtain any one of the first neighbor cell measurement report and the second neighbor cell measurement report returned by the terminal 03 within the upper limit of the timer 15,

the sending module 14 is configured to resend the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal 03.

Optionally, when the determining module 12 determines that the number of times that the sending module 14 resends the first neighboring cell measurement control message and the second neighboring cell measurement control message to the terminal 03 is greater than or equal to the preset number of times, the sending module 14 is configured to stop sending the first neighboring cell measurement control message and the second neighboring cell measurement control message to the terminal 03.

Illustratively, at least the transmission rate and the communication bandwidth of the second communication system are higher than those of the first communication system, and the transmission delay of the second communication system is lower than that of the first communication system.

Referring to fig. 7, an embodiment of the present invention further provides a terminal 03, including: a sending module 21, a receiving module 22 and a processing module 23;

a sending module 21, configured to send capability information of the terminal 03 to the first base station 10 to which the cell accessed by the terminal 03 belongs; the capability information of the terminal 03 is at least used for indicating whether the terminal 03 supports non-independent NSA networking;

a receiving module 22, configured to receive a first neighboring cell measurement control message and a second neighboring cell measurement control message sent by the first base station 10; the first adjacent cell belongs to a cell managed by the second base station in the adjacent cells of the cell accessed by the terminal 03, and the second adjacent cell belongs to a cell managed by the third base station in the adjacent cells of the cell accessed by the terminal 03; the communication system of the cell accessed by the terminal 03 and the first adjacent cell is a first communication system, and the communication system of the second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking; the first neighbor cell measurement control message includes: the first neighbor cell measurement event, the first neighbor cell list, and the first neighbor cell measurement parameter, and the second neighbor cell measurement control message includes: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list includes at least one code of a first neighbor cell, and the second neighbor cell list includes at least one code of a second neighbor cell;

a processing module 23, configured to measure the first neighboring cell and the second neighboring cell according to the first neighboring cell measurement control message and the second neighboring cell measurement control message received by the receiving module 22, so as to obtain a first measurement report including a measurement result of the first neighboring cell and a second measurement report including a measurement result of the second neighboring cell;

the sending module 21 is further configured to send the first measurement report and the second measurement report to the first base station 10, so that the first base station 10 generates an access switching instruction according to the first measurement report, and generates an auxiliary station adding instruction according to the second measurement report;

the receiving module 22 is further configured to receive an access switching instruction sent by the first base station 10;

the processing module 23 is further configured to control the terminal 03 to access the first target cell according to the access switching instruction received by the receiving module 22; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event.

Referring to fig. 8, an embodiment of the present invention further provides a base station 30 (equivalent to the first target base station 01 in the foregoing embodiment), including a receiving module 31 and a processing module 32;

a receiving module 31, configured to receive a secondary station addition instruction sent by another base station 33 (which is equivalent to the first base station 10 in the foregoing embodiment);

a processing module 32, configured to add another base station 34 (equivalent to the second target base station 02 in the foregoing embodiment) as a secondary station according to the secondary station addition instruction received by the receiving module 31;

the other base station 33 is a base station that does not support NAS networking, and both the base station 30 and the further base station 34 are base stations that support NAS networking;

the first cell managed by the base station 30 is of a first communication system, the second cell managed by the second base station 34 is of a second communication system, and the coverage areas of the first cell and the second cell are the same.

Referring to fig. 9, an embodiment of the present invention further provides a directional switching system 40, including: the first base station 10 provided in the above embodiment, the terminal 03 provided in the above embodiment, and the base station 30 provided in the above embodiment.

The directional switching system provided by the embodiment of the present invention, because the system includes the first base station, the terminal and the base station (which is the first target base station in the following) provided by the above-mentioned embodiment, therefore, when implementing the directional switching method, the directional switching system provided in the embodiments of the present invention determines a first neighboring cell that can be used for switching and a second neighboring cell that can be added as a secondary station according to the communication system of the neighboring cell of the cell where the terminal is located and the condition whether the first base station that belongs to supports NAS networking when the terminal and the base station corresponding to the cell where the terminal is located both support NAS networking, the communication system of a cell accessed by a terminal and a first adjacent cell is a first communication system, the communication system of a second adjacent cell is a second communication system, and a base station to which the first adjacent cell belongs and a base station to which the second adjacent cell belongs both support NAS networking; then, corresponding measurement control messages, namely a first adjacent cell measurement control message and a second adjacent cell measurement control message, are issued to the terminal, so that the terminal performs corresponding measurement on the first adjacent cell to obtain a first measurement report, and performs corresponding measurement on the second adjacent cell to obtain a second measurement report; after receiving a first measurement report and a second measurement report returned by a terminal, a first base station to which a cell currently accessed by the terminal belongs determines a first target cell for switching and a second target base station corresponding to a second target cell used as an auxiliary station from the measurement reports, so as to generate an access switching instruction for indicating the first target cell and an auxiliary station adding instruction for indicating the second target base station, and then the two instructions are respectively sent to the terminal and the first target base station to which the first target cell belongs, so that the terminal is switched to the first target cell while the first target base station adds the second target base station as the auxiliary station, and thus the terminal can enjoy communication capacities of two different communication systems simultaneously, and user experience is improved; in the whole process of the directional switching, the terminal simultaneously measures a first adjacent cell using the first communication system and managed by the base station supporting the NAS networking and a second adjacent cell using the second communication system and managed by the base station supporting the NAS networking in the cell using the first communication system and managed by the base station supporting the NAS networking, so that the access of the terminal can be directly switched after the measurement is completed, the consumption of signaling is saved, and the time delay of the directional switching is also saved.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A directional switching method is applied to a first base station, and is characterized by comprising the following steps:

acquiring capability information of a terminal accessed to a cell managed by the first base station and a neighboring cell list of the cell accessed by the terminal; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of at least one cell accessed by the terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking;

when the terminal is determined to support NSA networking and the first base station does not support NSA networking, generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the adjacent cell list and sending the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal so that the terminal can measure the first adjacent cell and the second adjacent cell;

the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of the cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of the cell accessed by the terminal and the first adjacent cell is a first communication system, and the communication system of the second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking;

the first neighbor cell measurement control message includes: a first neighbor cell measurement event, a first neighbor cell list, and a first neighbor cell measurement parameter, wherein the second neighbor cell measurement control message comprises: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list comprises codes of at least one first neighbor cell and the second neighbor cell list comprises codes of at least one second neighbor cell;

setting a timer to start timing, and when a first measurement report and a second measurement report returned by the terminal are acquired within the upper timing limit of the timer; generating an access switching instruction according to the first measurement report obtained by measuring the first adjacent cell returned by the terminal, and generating a secondary station adding instruction according to the second measurement report obtained by measuring the second adjacent cell returned by the terminal;

sending the access switching instruction to the terminal so as to switch the access of the terminal to a first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event;

sending the auxiliary station adding instruction to a first target base station to which the first target cell belongs, so that the first target base station adds a second target base station to which a second target cell belongs as an auxiliary station; the second target cell is a second adjacent cell which meets a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell.

2. The method of claim 1, wherein generating the first neighbor cell measurement control message and the second neighbor cell measurement control message according to the neighbor cell list comprises:

selecting a first adjacent cell and a second adjacent cell from the adjacent cell list according to the capability information of each adjacent cell in the adjacent cell list and generating a first adjacent cell list and a second adjacent cell list;

and generating a first adjacent cell measurement control message and a second adjacent cell measurement control message according to the first adjacent cell list and the second adjacent cell list.

3. The directional handover method according to claim 1, wherein when only the first neighbor cell measurement report returned by the terminal, or only the second neighbor cell measurement report returned by the terminal, or none of the first neighbor cell measurement report and the second neighbor cell measurement report returned by the terminal is obtained within an upper limit of the timer count,

and retransmitting the first adjacent cell measurement control message and the second adjacent cell measurement control message to the terminal.

4. The directional handover method according to claim 3, wherein when the number of times of re-sending the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal is greater than or equal to a preset number, the sending of the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal is stopped.

5. The directional switching method according to claim 1, wherein at least a transmission rate and a communication bandwidth of the second communication scheme are higher than those of the first communication scheme, and a transmission delay of the second communication scheme is lower than that of the first communication scheme.

6. A first base station is characterized by comprising an acquisition module, a judgment module, a timer, a processing module and a sending module;

the acquiring module is configured to acquire capability information of a terminal accessing a cell managed by the first base station and an adjacent cell list of the cell accessed by the terminal; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not; the adjacent cell list comprises codes of adjacent cells of at least one cell accessed by the terminal and capability information of each adjacent cell, wherein the capability information of the adjacent cells is at least used for indicating the communication system of the adjacent cells and whether a base station to which the adjacent cells belong supports NSA networking;

when the judging module determines that the terminal supports NSA networking according to the capability information of the terminal acquired by the acquiring module and determines that the first base station does not support NSA networking, the processing module is configured to generate a first neighbor cell measurement control message and a second neighbor cell measurement control message according to the neighbor cell list acquired by the acquiring module;

the sending module is configured to send the first neighboring cell measurement control message and the second neighboring cell measurement control message generated by the processing module to the terminal, so that the terminal measures the first neighboring cell and the second neighboring cell;

the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of the cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of the cell accessed by the terminal and the first adjacent cell is a first communication system, and the communication system of the second adjacent cell is a second communication system; the second communication system at least has a transmission rate and a communication bandwidth higher than the first communication system, and the transmission delay of the second communication system is lower than the first communication system; the second base station and the third base station both support NSA networking;

the acquiring module is configured to acquire a first measurement report obtained by measuring the first neighboring cell and a second measurement report obtained by measuring the second neighboring cell, which are returned by the terminal;

the timer is configured to start timing after the sending module sends the first neighboring cell measurement control message and the second neighboring cell measurement control message generated by the processing module to the terminal, and when the obtaining module obtains the first measurement report and the second measurement report returned by the terminal within a timing upper limit of the timer; the processing module is further configured to generate an access switching instruction according to the first measurement report acquired by the acquisition module, and generate an auxiliary station adding instruction according to the second measurement report acquired by the acquisition module;

the sending module is further configured to send the access switching instruction generated by the processing module to the terminal, so that the access of the terminal is switched to a first target cell; the first target cell is a first neighbor cell satisfying a first neighbor cell measurement event;

the sending module is further configured to send the secondary station adding instruction generated by the processing module to a first target base station to which the first target cell belongs, so that the first target base station adds a second target base station to which a second target cell belongs as a secondary station; the second target cell is a second adjacent cell which meets a second adjacent cell measurement event, and the coverage area of the first target cell is the same as that of the second target cell.

7. The first base station of claim 6, wherein the processing module is specifically configured to:

selecting a first adjacent cell and a second adjacent cell from the adjacent cell list acquired by the acquisition module according to the capability information of each adjacent cell in the adjacent cell list acquired by the acquisition module, and generating a first adjacent cell list and a second adjacent cell list;

8. The first base station of claim 6, wherein when the obtaining module receives only the first neighbor cell measurement report returned by the terminal, or receives only the second neighbor cell measurement report returned by the terminal, or does not receive any one of the first neighbor cell measurement report and the second neighbor cell measurement report returned by the terminal within the upper timing limit of the timer,

the sending module is configured to resend the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal.

9. The first base station of claim 8, wherein when the determining module determines that the number of times that the sending module resends the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal is greater than or equal to a preset number of times, the sending module is configured to stop sending the first neighbor cell measurement control message and the second neighbor cell measurement control message to the terminal.

10. The first base station according to claim 6, wherein at least a transmission rate and a communication bandwidth of the second communication system are higher than the first communication system, and a transmission delay of the second communication system is lower than the first communication system.

11. A terminal, comprising: the device comprises a sending module, a receiving module and a processing module;

the sending module is configured to send capability information of the terminal to a first base station to which a cell to which the terminal accesses belongs; the capability information of the terminal is at least used for indicating whether the terminal supports non-independent NSA networking or not;

the receiving module is configured to receive a first neighboring cell measurement control message and a second neighboring cell measurement control message sent by the first base station; the first adjacent cell belongs to a cell managed by a second base station in adjacent cells of the cell accessed by the terminal, and the second adjacent cell belongs to a cell managed by a third base station in adjacent cells of the cell accessed by the terminal; the communication system of the cell accessed by the terminal and the first adjacent cell is a first communication system, and the communication system of the second adjacent cell is a second communication system; the second base station and the third base station both support NSA networking; the first neighbor cell measurement control message includes: a first neighbor cell measurement event, a first neighbor cell list, and a first neighbor cell measurement parameter, wherein the second neighbor cell measurement control message comprises: a second neighbor cell measurement event, a second neighbor cell list, and a second neighbor cell measurement parameter; the first neighbor cell list comprises codes of at least one first neighbor cell and the second neighbor cell list comprises codes of at least one second neighbor cell;

the processing module is configured to measure the first neighboring cell and the second neighboring cell according to the first neighboring cell measurement control message and the second neighboring cell measurement control message received by the receiving module, so as to obtain a first measurement report including a measurement result of the first neighboring cell and a second measurement report including a measurement result of the second neighboring cell;

the sending module is further configured to send the first measurement report and the second measurement report to the first base station within a preset time, so that the first base station generates an access switching instruction according to the first measurement report, and generates an auxiliary station adding instruction according to the second measurement report;

the receiving module is further configured to receive an access switching instruction sent by the first base station;

the processing module is further configured to control the terminal to access a first target cell according to the access switching instruction received by the receiving module; the first target cell is a first neighbor cell that satisfies a first neighbor cell measurement event.

12. The terminal according to claim 11, wherein at least a transmission rate and a communication bandwidth of the second communication scheme are higher than the first communication scheme, and a transmission delay of the second communication scheme is lower than the first communication scheme.

13. A base station, comprising a receiving module and a processing module;

the receiving module is configured to receive an auxiliary station adding instruction sent by another base station, where the auxiliary station adding instruction is generated by the other base station according to a measurement report obtained by measuring a second cell and returned by a terminal;

the processing module is configured to add another base station as an auxiliary station according to the auxiliary station addition instruction received by the receiving module;

the first cell managed by the base station is of a first communication system, the second cell managed by the other base station is of a second communication system, and the coverage areas of the first cell and the second cell are the same.

14. The base station of claim 13, wherein at least a transmission rate and a communication bandwidth of the second communication scheme are higher than the first communication scheme, and a transmission delay of the second communication scheme is lower than the first communication scheme.

15. A directional switching system, comprising: the first base station according to any of claims 6-10, the terminal according to claim 11 or 12 and the base station according to claim 13 or 14.