CN115243329B - Method and device for switching cells in non-independent networking network - Google Patents
Method and device for switching cells in non-independent networking network Download PDFInfo
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- CN115243329B CN115243329B CN202110437497.3A CN202110437497A CN115243329B CN 115243329 B CN115243329 B CN 115243329B CN 202110437497 A CN202110437497 A CN 202110437497A CN 115243329 B CN115243329 B CN 115243329B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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Abstract
The invention provides a switching method and a switching device between cells in a non-independent networking network. Wherein the method comprises the following steps: before receiving a common-frequency measurement report reported by a user terminal and carrying out inter-cell handover judgment, inquiring whether a target base station cell has the capability of supporting EN-DC or not and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not; if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow. By adopting the switching method between cells in the non-independent networking network disclosed by the invention, whether the base station cell can be used as a target base station cell for switching the user terminal can be accurately judged by inquiring the message and confirming the feedback before the switching judgment between cells is carried out, so that the residence of the user terminal in the network is ensured, the interruption of network service is avoided, and the stability of a network system is improved.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a method and a device for switching cells in a non-independent networking network. In addition, the invention also relates to an electronic device.
Background
Two networking technical schemes are defined in a 5G (5 th generation mobile networks) networking architecture, namely: SA (independent networking) and NSA (Non-independent networking). The two networking technical schemes are mainly different in that whether the 5G wireless network can independently provide communication service for 5G users or not: the independent networking technical scheme does not need to use a 4G (the 4th generation mobile communication technology) network, and the 5G network can independently provide the capability of core networks such as user access, residence and the like; the technical scheme of the non-independent networking needs to provide the capability of core networks such as access, residence and the like for users by means of a 4G network. Under SA architecture, the control plane and the user plane are both in 5G new network, and the access and mobility management of NSA terminal (i.e. user terminal) are controlled at NR side; the control plane and the user plane are separated in the NSA architecture, for example, the control plane is on the 4G side and the user plane is on the NR side in the Option3/7 series architecture, and the access, mobility management and other controls are on the 4G side in the NSA architecture, and the network cell where the 4G is located is called an Anchor point (Anchor) cell. Because CP and UP are separated, taking the Option 3x networking as an example, when a cell supports NSA, the EN-DC (EUTRA-NR Dual Connection) capability needs to be opened and 5G related frequency points need to be configured, when a user terminal accesses the cell, management (adding, deleting, etc.) of 5G auxiliary carriers can be performed after the combination of the frequency band supporting capability reported by the user terminal (LTE frequency point+nr frequency point) and the frequency band supporting capability combination configured by the cell are matched. The NSA architecture defined in the current protocol, the control plane anchor of the UE (User Equipment) is on LTE (Long Term Evolution ), so the UE needs to maintain a connection with the LTE network.
However, in the description of the S1 and X2 interfaces in the 3GPP TS 36.413/TS 36.423 in the existing 3GPP protocol, the base station cell capability acquired at the time of handover does not include the support of NSA capability (EN-DC capability and support band) by the target base station cell. Since the rules of NSA still need to rely on LTE network setup, a deployed LTE network may have multiple frequency points (cells). As shown in fig. 2, in the actual network networking, when the user terminal moves in the NSA network to perform the cell handover decision, the handover source base station cell cannot accurately obtain whether the target base station cell supports the EN-DC capability and the supported frequency band, and there is a problem that the 5G drop is easily caused by the NSA terminal handover from the anchor cell to the non-anchor cell. Especially, in the deployment scene of different frequency anchor point region division, the same frequency switching is preferential to different frequency switching, so that NSA terminal is easily caused to switch from an anchor point cell to a same frequency non-anchor point cell, and 5G service interruption is caused.
Therefore, how to enable the source base station cell to acquire the latest capacity and supporting frequency band of the target base station cell for supporting EN-DC in real time, and more accurately judge whether the opposite base station cell can be used as the target cell for switching the user terminal when the switching judgment is carried out, so that ensuring that the user terminal always resides in the 5G network becomes an important subject of research in the field.
Disclosure of Invention
Therefore, the invention provides a method and a device for switching cells in a non-independent networking network, which are used for solving the problem of poor switching stability among cells due to higher limitation of a switching scheme among cells in the non-independent networking network in the prior art.
The invention provides a switching method between cells in a non-independent networking network, which comprises the following steps:
before receiving a common-frequency measurement report reported by a user terminal and carrying out inter-cell handover judgment, inquiring whether a target base station cell has the capability of supporting EN-DC or not and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not;
if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow.
Further, the querying whether the target base station cell has the capability of supporting EN-DC and whether the NR frequency band supported by the target base station cell matches the capability of the ue specifically includes:
sending a base station non-independent networking capability query request aiming at the target base station cell through a plane interface; the base station non-independent networking capability query request carries a capability of querying whether the target base station cell supports EN-DC and an identifier of supporting NR frequency band capability;
receiving a base station non-independent networking capability query response fed back by the target base station cell;
and determining whether the target base station cell has the capability of supporting EN-DC and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not based on the base station non-independent networking capability query response.
Further, the inter-frequency switching decision process specifically includes:
searching an inter-frequency base station cell, transmitting an inter-frequency measurement frequency point to a user terminal for inter-frequency cell measurement, receiving an inter-frequency measurement report reported by the user terminal, and judging whether the inter-frequency base station cell has non-independent networking capability according to the inter-frequency measurement report; the non-independent networking capability comprises the capability of the inter-frequency base station cell for supporting EN-DC and the capability of whether an NR frequency band supported by the inter-frequency base station cell is matched with the user terminal or not;
if yes, executing a corresponding inter-frequency switching flow, and switching the user terminal to the inter-frequency base station cell.
Further, the method for switching cells in the non-independent networking network further comprises: inquiring the non-independent networking capability of a base station cell by an event triggering or periodical mode, and storing or updating the non-independent networking capability of the base station cell according to a preset time period; the base station cell is a target base station cell or the inter-frequency base station cell; the non-independent networking capability includes an EN-DC capable capability and an NR frequency band capable capability.
Further, the storing or updating the non-independent networking capability of the base station cell according to a preset time period specifically includes:
storing the non-independent networking capability of the base station cell according to a preset time period, and setting a corresponding aging timer;
before making inter-cell handover decision, checking whether the aging timer expires when inquiring the non-independent networking capability of the base station cell, and if so, updating the non-independent networking capability.
Further, the method for switching cells in the non-independent networking network further comprises: adding a base station non-independent networking capability query request message and a base station non-independent networking capability query response message based on the plane interface in advance; the plane interface is an S1 plane interface or an X2 plane interface.
Further, the EN-DC is a dual connection of a fifth generation mobile communication radio access network and a fourth generation mobile communication radio access network; and the NR frequency band is the frequency band of the fifth generation mobile communication wireless access network.
Further, the target base station cell is a same-frequency base station cell.
The invention also provides a switching device between cells in the non-independent networking network, which comprises:
the non-independent networking capability query unit is used for querying whether a target base station cell has the capability of supporting EN-DC and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal before receiving a common-frequency measurement report reported by the user terminal to carry out inter-cell handover judgment;
the cell switching unit is used for: if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow.
Further, the cell switching unit is specifically configured to: searching an inter-frequency base station cell, transmitting an inter-frequency measurement frequency point to a user terminal for inter-frequency cell measurement, receiving an inter-frequency measurement report reported by the user terminal, and judging whether the inter-frequency base station cell has non-independent networking capability according to the inter-frequency measurement report; the non-independent networking capability comprises the capability of the inter-frequency base station cell for supporting EN-DC and the capability of whether an NR frequency band supported by the inter-frequency base station cell is matched with the user terminal or not; if yes, executing a corresponding inter-frequency switching flow, and switching the user terminal to the inter-frequency base station cell.
Further, the non-independent networking capability query unit is specifically configured to:
sending a base station non-independent networking capability query request aiming at the target base station cell through a plane interface; the base station non-independent networking capability query request carries a capability of querying whether the target base station cell supports EN-DC and an identifier of supporting NR frequency band capability;
receiving a base station non-independent networking capability query response fed back by the target base station cell;
and determining whether the target base station cell has the capability of supporting EN-DC and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not based on the base station non-independent networking capability query response.
Further, the switching device between cells in the non-independent networking network further includes: the query control unit is used for querying the non-independent networking capability of the base station cell through event triggering or a periodic mode, and storing or updating the non-independent networking capability of the base station cell according to a preset time period; the base station cell is a target base station cell or the inter-frequency base station cell; the non-independent networking capability includes an EN-DC capable capability and an NR frequency band capable capability.
Further, the query control unit is specifically configured to: storing the non-independent networking capability of the base station cell according to a preset time period, and setting a corresponding aging timer;
before making inter-cell handover decision, checking whether the aging timer expires when inquiring the non-independent networking capability of the base station cell, and if so, updating the non-independent networking capability.
Further, the switching device between cells in the non-independent networking network further includes: a request message field adding unit, configured to add a base station non-independent networking capability query request message and a base station non-independent networking capability query response message in advance based on the plane interface; the plane interface is an S1 plane interface or an X2 plane interface.
Further, the EN-DC is a dual connection of a fifth generation mobile communication radio access network and a fourth generation mobile communication radio access network; and the NR frequency band is the frequency band of the fifth generation mobile communication wireless access network.
Further, the target base station cell is a same-frequency base station cell.
Correspondingly, the invention also provides electronic equipment, which comprises: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for switching between cells in a non-independent networking network as described in any of the above when the program is executed.
By adopting the switching method among cells in the non-independent networking network, the invention can more accurately judge whether the base station cell can be used as a target base station cell for switching the user terminal or not by inquiring information and confirming feedback before carrying out switching judgment among cells, thereby ensuring that the user terminal resides in the network, avoiding network service interruption and improving the stability of a network system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly describe the drawings that are required to be used in the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a switching method between cells in a non-independent networking network according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a 5G service interruption caused by inter-cell handover in a non-independent networking network provided in the prior art;
fig. 3 is a schematic diagram illustrating a handover between cells in a non-independent networking network according to an embodiment of the present invention;
fig. 4 is a flowchart of a base station non-independent networking capability query and feedback process provided in an embodiment of the present invention;
fig. 5 is a flowchart of performing handover selection and decision according to the target base station cell non-independent networking capability according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a switching device between cells in a non-independent networking network according to an embodiment of the present invention;
fig. 7 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which are derived by a person skilled in the art from the embodiments according to the invention without creative efforts, fall within the protection scope of the invention.
The following describes embodiments of the method for switching cells in a non-independent networking network according to the present invention. As shown in fig. 1, which is a flow chart of a switching method between cells in a non-independent networking network according to an embodiment of the present invention, a specific implementation process includes the following steps:
step 101: before receiving a common-frequency measurement report reported by a user terminal and performing inter-cell handover judgment, inquiring whether the target base station cell has the capability of supporting EN-DC (EUTRA-NR Dual Connection) and whether an NR (New Radio) frequency band supported by the target base station cell is matched with the capability of the user terminal.
Specifically, a base station non-independent networking capability (NSA capability) query request message and a base station non-independent networking capability query response message are added in advance based on the plane interface, and are used for querying and feeding back base station cell NSA capability (EN-DC capability and supporting frequency band capability). The source base station cell can perform NSA capability inquiry through event triggering, periodicity and other modes, the related capability is stored for a certain time, and the data flow of the interface is reduced. The plane interface is an S1 plane interface or an X2 plane interface. In LTE, the S1 plane interface refers to a connection interface between EPC (core network) and eNB, and the X2 plane interface refers to an interface between enbs. Before receiving a common-frequency measurement report reported by a user terminal (also called NSA terminal) and performing inter-cell handover judgment, a source base station cell needs to send a base station non-independent networking capability query request aiming at a target base station cell through a plane interface to check whether the target base station cell supports EN-DC capability, whether an NR frequency band supported by the target base station cell is matched with NSA capability such as user terminal capability and the like. The base station non-independent networking capability query request carries an identifier for querying whether the target base station cell supports EN-DC capability and NR frequency band supporting capability. The source base station cell receives the base station non-independent networking capability query response fed back by the target base station cell, and checks whether the target base station cell has the capability of supporting EN-DC or not and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not based on the base station non-independent networking capability query response.
The EN-DC is the double connection of a fifth-generation mobile communication wireless access network and a fourth-generation mobile communication wireless access network; the fifth generation of the NR frequency band is the frequency band of the mobile communication wireless access network, namely the 5G NR frequency band. The target base station cell is the same-frequency base station cell. The user terminal is UE (User Equipment) in the traffic state.
Step 102: if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow.
As shown in fig. 3, in the embodiment of the present invention, the method further includes triggering the non-independent networking network to execute the inter-frequency handover decision process. The specific process comprises the following steps: and searching the inter-frequency base station cell, transmitting the inter-frequency measurement frequency point to the user terminal to perform inter-frequency cell measurement, and performing the judgment process of the step 101. And receiving an inter-frequency measurement report reported by the user terminal, and judging whether the inter-frequency base station cell has the capability of non-independent networking according to the inter-frequency measurement report.
The non-independent networking capability comprises the capability of the inter-frequency base station cell to support EN-DC and the capability of the inter-frequency base station cell to support NR frequency bands whether to match the user terminal. If yes, executing a corresponding inter-frequency switching flow, and switching the user terminal to the inter-frequency base station cell.
In a specific implementation process, NSA terminal mobility management is performed in a loop according to steps 101 and 102. The base station cell queries and updates the NSA (non-independent networking) capability of the target base station cell according to various modes such as event triggering, periodicity and the like. Specifically, the non-independent networking capability of the base station cell can be queried through event triggering or in a periodic mode, and the non-independent networking capability of the base station cell can be stored or updated according to a preset time period. The base station cell is a target base station cell or the inter-frequency base station cell; the non-independent networking capability includes an EN-DC capable capability and an NR frequency band capable capability.
The method for storing or updating the non-independent networking capability of the base station cell according to the preset time period comprises the following specific implementation processes: storing the non-independent networking capability of the base station cell according to a preset time period, and setting a corresponding aging timer; before making inter-cell handover decision, checking whether the aging timer expires when inquiring the non-independent networking capability of the base station cell, and if so, updating the non-independent networking capability.
As shown in fig. 4, the S-eNB is a source 4G anchor base station; MME is a core network mobility management entity; the T-eNB is a target 4G anchor base station; ENB NSA capability query request is a base station NSA capability query request; ENB NSA capability query response is a base station NSA capability query response.
When in handover decision, the specific process of inquiring and feeding back the base station non-independent networking capability of the target base station cell comprises the following steps: when receiving the common-frequency measurement report reported by the NSA terminal and preparing for handover, the anchor base station cell (i.e. the source base station cell) needs to determine the NSA capability of the target base station cell, and the source base station cell checks the NSA supporting capability of the target base station cell according to the feedback response information, if the source base station cell does not know whether the target cell has the NSA capability, the source base station cell can query the capability of the opposite base station cell (i.e. the target base station cell) through a eNB NSA capability query request (base station non-independent networking capability query request) message of the S1/X2 plane interface, and the opposite base station cell needs to return eNB NSA capability query response (base station non-independent networking capability query response) to feed back the NSA configuration capability of the queried target base station cell after receiving the request message. The base station query request needs to carry the capability of querying whether the target base station cell supports NSA EN-DC capability and supported NR frequency bands, such as N41, N78, N79, etc.
The specific cells required to be contained in the base station non-independent networking capability query request are as follows:
the target base station cell returns the supported capability, and the specific cells required for the base station non-independent networking capability query response are as follows:
as shown in fig. 5, the UE: user Equipment, user terminal; S-eNB: a source 4G anchor base station; S-gNB: a source 5G base station; T-eNB: a destination base station; S-GW: a service gateway; MME: a core network mobility management entity; LTE A3/A4 measurement Control: LTE measurement control; LTE A3/A4 Measure Report: LTE measurement report; ENB NSA capability query Req: a base station NSA capability inquiry request; ENB NSA capability query Rsp: the base station NSA capability inquiry response; HO Req: a switching request; sgNB Add Req: an NSA auxiliary station adds a request; sgNB Add Req ACK: the NSA auxiliary station adds request confirmation; HO Req Ack: confirming a switching request; sgNB Rel Req: NSA secondary station release request; RRC connrecfg: wireless link connection reconfiguration; random Access: the terminal is accessed randomly; RRC CONN RECFG CMP: the reconfiguration of the wireless link connection is completed; random Access: the terminal is accessed randomly; sgNB Recfg CMP: the reconfiguration of the NSA auxiliary station is completed; path Switch: switching links; UE Context Rel: releasing the context information of the terminal; UE Context Rel CMP: and finishing the release of the terminal context information.
In a specific implementation process, the UE reports a periodic MR (Measurement Report ) to a source eNodeB (Evolved Node-B, eNB for short), i.e. a source base station cell in the LTE network, in a service state. The source eNodeB monitors whether the measurement configuration needs to be issued according to the cell trigger measurement reason. If the triggering condition is met, the source eNodeB transmits measurement configuration information comprising a measurement object and a measurement event to the UE through signaling RRC (Connection Reconfiguration) and the UE measures related information according to the measurement configuration information and reports the measurement configuration information to the source eNodeB, the source eNodeB performs switching selection and judgment according to NSA capability of a target base station cell, if the opposite base station cell does not have NSA capability, the base station searches neighbor base stations with other different frequency points in the neighbor cells, if the opposite base station cell does not have NSA capability, different-frequency measurement is transmitted to the user terminal, and the user terminal reports a measurement report and performs next switching control according to the measurement report. If the opposite terminal base station cell has NSA capability, a switching request message is normally initiated to the target station to carry out a switching process according to the same-frequency switching control algorithm. It should be noted that, the switching method between cells in the non-independent networking network according to the present invention can be implemented based on a preset base station.
By adopting the switching method among cells in the non-independent networking network, the invention can more accurately judge whether the base station cell can be used as a target base station cell for switching the user terminal or not by inquiring information and confirming feedback before carrying out switching judgment among cells, thereby ensuring that the user terminal resides in the network, avoiding network service interruption and improving the stability of a network system.
The invention also provides a switching device between cells in the non-independent networking network corresponding to the switching method between cells in the non-independent networking network. Since the embodiment of the apparatus is similar to the above method embodiment, the description is relatively simple, and the relevant point is that the following description refers to the description of the method embodiment section, and the embodiment of the switching apparatus between cells in the non-independent networking network is only illustrative. Fig. 6 is a schematic structural diagram of a switching device between cells in a non-independent networking network according to an embodiment of the present invention. The invention relates to a switching device between cells in a non-independent networking network, which specifically comprises the following parts:
the non-independent networking capability query unit 601 is configured to query whether a target base station cell has an ability to support EN-DC and whether an NR frequency band supported by the target base station cell matches an ability of the user terminal before receiving a co-frequency measurement report reported by the user terminal and performing inter-cell handover decision;
the cell switching unit is configured to 602: if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow.
By adopting the switching device among cells in the non-independent networking network, the invention can more accurately judge whether the base station cell can be used as a target base station cell for switching the user terminal or not by inquiring information and confirming feedback before carrying out the switching judgment among cells, thereby ensuring that the user terminal resides in the network, avoiding network service interruption and improving the stability of a network system.
The invention also provides electronic equipment corresponding to the switching method between cells in the non-independent networking network. The electronic device may refer to a source base station cell. Since the embodiments of the electronic device are similar to the method embodiments described above, the description is relatively simple, and reference should be made to the description of the method embodiments described above, and the electronic device described below is merely illustrative. Fig. 7 is a schematic diagram of the physical structure of an electronic device according to an embodiment of the present invention. The electronic device may include: a processor (processor) 701, a memory (memory) 702, and a communication bus 703, wherein the processor 701, the memory 702, and the communication bus 703 complete communication with each other. The processor 701 may invoke logic instructions in the memory 702 to perform a method of switching between cells in a non-independent networking network, the method comprising: before receiving a common-frequency measurement report reported by a user terminal and carrying out inter-cell handover judgment, inquiring whether a target base station cell has the capability of supporting EN-DC or not and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not; if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow.
Further, the logic instructions in the memory 702 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and some or all of the modules may be selected according to actual needs to achieve the objectives of the present embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for switching between cells in a non-independent networking network, comprising:
before receiving a common-frequency measurement report reported by a user terminal and carrying out inter-cell handover judgment, inquiring whether a target base station cell has the capability of supporting EN-DC or not and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not;
if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow; the different frequency switching judgment flow specifically comprises the following steps: searching an inter-frequency base station cell, transmitting an inter-frequency measurement frequency point to a user terminal for inter-frequency cell measurement, receiving an inter-frequency measurement report reported by the user terminal, and judging whether the inter-frequency base station cell has non-independent networking capability according to the inter-frequency measurement report; the non-independent networking capability comprises the capability of the inter-frequency base station cell for supporting EN-DC and the capability of whether an NR frequency band supported by the inter-frequency base station cell is matched with the user terminal or not; if yes, executing a corresponding inter-frequency switching flow, and switching the user terminal to the inter-frequency base station cell;
the method further comprises the steps of:
inquiring the non-independent networking capability of a base station cell by an event triggering or periodical mode, storing the non-independent networking capability of the base station cell according to a preset time period, and setting a corresponding aging timer; before making inter-cell handover decision, checking whether the aging timer expires when inquiring the non-independent networking capability of the base station cell, and if so, updating the non-independent networking capability; the base station cell is the target base station cell or the inter-frequency base station cell; the non-independent networking capability includes an EN-DC capable capability and an NR frequency band capable capability.
2. The method for switching between cells in a non-independent networking network according to claim 1, wherein the querying whether the target base station cell has an ability to support EN-DC and whether the NR frequency band supported by the target base station cell matches the ability of the ue specifically includes:
sending a base station non-independent networking capability query request aiming at the target base station cell through a plane interface; the base station non-independent networking capability query request carries a capability of querying whether the target base station cell supports EN-DC and an identifier of supporting NR frequency band capability;
receiving a base station non-independent networking capability query response fed back by the target base station cell;
and determining whether the target base station cell has the capability of supporting EN-DC and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal or not based on the base station non-independent networking capability query response.
3. The method for switching between cells in a non-independent networking network of claim 2, further comprising: adding a base station non-independent networking capability query request message and a base station non-independent networking capability query response message based on the plane interface in advance; the plane interface is an S1 plane interface or an X2 plane interface.
4. A method for switching between cells in a non-independent networking network according to any of claims 1-3, characterized in that said EN-DC is a dual connection of a fifth generation mobile communication radio access network and a fourth generation mobile communication radio access network; and the NR frequency band is the frequency band of the fifth generation mobile communication wireless access network.
5. The method for switching between cells in a non-independent networking network according to claim 1, wherein the target base station cell is a same frequency base station cell.
6. A switching device between cells in a non-independent networking network, comprising:
the non-independent networking capability query unit is used for querying whether a target base station cell has the capability of supporting EN-DC and whether an NR frequency band supported by the target base station cell is matched with the capability of the user terminal before receiving a common-frequency measurement report reported by the user terminal to carry out inter-cell handover judgment;
the cell switching unit is used for: if yes, executing a corresponding switching flow, and switching the user terminal to the target base station cell; if not, triggering the non-independent networking network to execute the inter-frequency switching judgment flow; the cell switching unit is specifically configured to: searching an inter-frequency base station cell, transmitting an inter-frequency measurement frequency point to a user terminal for inter-frequency cell measurement, receiving an inter-frequency measurement report reported by the user terminal, and judging whether the inter-frequency base station cell has non-independent networking capability according to the inter-frequency measurement report; the non-independent networking capability comprises the capability of the inter-frequency base station cell for supporting EN-DC and the capability of whether an NR frequency band supported by the inter-frequency base station cell is matched with the user terminal or not; if yes, executing a corresponding inter-frequency switching flow, and switching the user terminal to the inter-frequency base station cell;
the device further comprises:
the query control unit is used for querying the non-independent networking capability of the base station cell through event triggering or a periodic mode, storing the non-independent networking capability of the base station cell according to a preset time period and setting a corresponding aging timer; before making inter-cell handover decision, checking whether the aging timer expires when inquiring the non-independent networking capability of the base station cell, and if so, updating the non-independent networking capability; the base station cell is the target base station cell or the inter-frequency base station cell; the non-independent networking capability includes an EN-DC capable capability and an NR frequency band capable capability.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for switching between cells in a non-independent networking network according to any of claims 1-5 when the program is executed.
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