CN110891290B - Method and device for reestablishing intra-cell handover - Google Patents
Method and device for reestablishing intra-cell handover Download PDFInfo
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- CN110891290B CN110891290B CN201811046040.4A CN201811046040A CN110891290B CN 110891290 B CN110891290 B CN 110891290B CN 201811046040 A CN201811046040 A CN 201811046040A CN 110891290 B CN110891290 B CN 110891290B
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Abstract
The embodiment of the invention discloses a method and a device for reestablishing intra-cell handover, which can improve the success rate of reestablishing intra-cell handover. The method comprises the following steps: s1, sending an intra-cell handover reconfiguration message to the terminal; s2, receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining the security configuration used by the terminal for initiating a reestablishment process according to the reestablishment request message, calculating the MACI according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a second MACI; and S3, if the first MACI and the second MACI are judged to be consistent, sending a reestablishment message to the terminal.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for reestablishing intra-cell handover.
Background
In an LTE (Long Term Evolution ) system, a network side in various scenes, such as CA (CA carrier aggregation) configuration, security parameter change, etc., may initiate an intra-cell handover procedure, and when a reestablishment is initiated during the handover procedure, the Network side searches the context of the terminal according to the CRNTI (Cell Radio Network Temporary Identifier) and the PCI (Physical Cell Identifier) of the reestablishment request message, calculates the MACI (Medium Access Control Identifier) by using the security configuration (the security configuration is the security configuration before switching) stored in the context, and compares the MACI with the MACI carried by the reestablishment request message of the terminal, if the comparison is passed and the safety check is successful, issuing a reestablishment message, and if the comparison is failed and the safety check is failed, issuing a reestablishment rejection, wherein the flow chart is shown in fig. 1, and the specific process is as follows:
s110, a network side initiates intra-cell switching;
s111, a network side receives a reestablishment request message sent by a terminal;
s112, the network side searches the context of the terminal according to the CRNTI and the PCI in the reestablishment request message;
s113, the network side judges whether the terminal context is searched successfully, if so, the step S114 is executed, otherwise, the step S117 is executed;
s114, the network side calculates the MACI by using the security configuration stored in the terminal context;
s115, the network side compares the calculated MACI with the MACI carried in the reestablishment request message, judges whether the MACI and the MACI are consistent, if so, executes the step S116, otherwise, executes the step S117;
s116, the network side sends a reestablishment message to the terminal through an air interface;
and S117, the network side sends a reestablishment rejection to the terminal through an air interface.
The processing flow of the terminal is shown in fig. 2:
s120, receiving an intra-cell switching reconfiguration message sent by a network side through an air interface;
s121, backing up CRNTI before switching and safety configuration before switching, updating the CRNTI and safety configuration of the CRNTI and safety configuration by using the CRNTI and safety configuration carried in the switching reconfiguration message in the cell, and initiating a switching access process according to the updated CRNTI and safety configuration;
s122, judging whether mg2 sent by the network side is received or not, wherein the switching failure sending and re-establishing process is divided into two specific conditions: firstly, if mg2 is received and the radio link fails, step S123 is executed, i.e. a re-establishment procedure is initiated, and then steps S124 and S125 are executed; secondly, if mg2 is not received, step S128 is executed, that is, a reestablishment process is initiated, then steps S129 and S125 are executed, and a reestablishment request message is sent to the network side through an air interface, wherein the reestablishment request message carries the MACI and the corresponding CRNTI calculated by the terminal;
s124, calculating the MACI by using the switched security configuration (namely the updated security configuration);
s129, calculating the MACI by using the security configuration before switching (namely the security configuration before updating);
and S125, sending a reestablishment request message to the network side through an air interface, wherein the reestablishment request message carries the computed MACI and the CRNTI corresponding to the MACI.
After the reestablishment request message is sent to the network side, step S126 or S127 is executed.
If the terminal initiates the reestablishment after the switching access (receiving the random access response msg2 of the network side), the safety configuration after the switching is used according to the protocol, because the CRNTI before the backup switching is the same as the CRNTI carried in the switching reconfiguration message in the cell, the safety configuration before the switching is determined by the network side according to the CRNTI and the PCI in the reestablishment request message by searching the context of the terminal under the scene, namely the safety configuration before the switching is used by the MACI of the network side under the scene, the safety configuration used by the network side and the terminal for calculating the MACI is different at the moment, the MACI calculated by the network side and the terminal is not consistent, and the reestablishment fails.
In this scenario, the MACI calculated by the network side and the terminal are inconsistent, and the reconstruction fails.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the embodiment of the invention provides a method and a device for reestablishing intra-cell handover.
In one aspect, an embodiment of the present invention provides a method for reestablishing an intra-cell handover, where the method includes:
s1, sending an intra-cell handover reconfiguration message to a terminal, wherein the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell wireless network temporary identifier of the terminal before handover;
s2, receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining the security configuration used by the terminal to initiate a reestablishment process according to the reestablishment request message, calculating the MACI according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI;
and S3, if the first MACI and the second MACI are judged to be consistent, sending a reestablishment message to the terminal.
On the other hand, an embodiment of the present invention provides an intra-cell handover re-establishment apparatus, including:
a first sending unit, configured to send an intra-cell handover reconfiguration message to a terminal, where the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell radio network temporary identifier of the terminal before handover;
a computing unit, configured to receive a reestablishment request message sent by the terminal, determine, according to the reestablishment request message, a security configuration used by the terminal to initiate a reestablishment process after finding a context of the terminal according to the reestablishment request message, calculate a MACI according to the security configuration, and use the MACI as a first MACI, where the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI;
and the second sending unit is used for sending a reestablishment message to the terminal if the first MACI and the second MACI are judged to be consistent.
In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, a bus, and a computer program stored on the memory and executable on the processor;
the processor and the memory complete mutual communication through the bus;
the processor, when executing the computer program, implements the method described above.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the above method.
The method and the device for reestablishing intra-cell handover provided in the embodiments of the present invention are characterized in that the first CRNTI and the second CRNTI carried in the intra-cell handover reconfiguration message are different, that is, the CRNTI of the terminal before handover is different from the CRNTI of the terminal after handover, and the CRNTI and the security configuration are corresponding, and the reestablishment request message sent by the terminal to the network side carries the MACI calculated by the terminal according to the security configuration and the CRNTI corresponding to the security configuration used for calculating the MACI, so that the network side can determine the security configuration corresponding to the CRNTI according to the CRNTI in the reestablishment request message sent by the terminal, that is, the terminal initiates the security configuration used in the reestablishment process, and the network side calculates the MACI according to the security configuration, so that compared with the case where the MACI calculated by the network side and the terminal is consistent during the security verification, the reestablishment succeeds, the existing technology that reestablishment fails due to the difference in the security configurations used when the network side and the terminal calculate the MACI, the scheme can improve the success rate of switching reestablishment in the cell, does not change the protocol and can be compatible with all terminals.
Drawings
Fig. 1 is a schematic diagram of a switching process in a cell on a network side in the prior art;
fig. 2 is a schematic diagram of a switching process in a terminal side cell;
fig. 3 is a flowchart illustrating a method for reestablishing an intra-cell handover according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for reestablishing an intra-cell handover according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of an intra-cell handover re-establishment apparatus according to an embodiment of the present invention;
fig. 6 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.
Referring to fig. 3, the present embodiment discloses a method for reestablishing an intra-cell handover, including:
s1, sending an intra-cell handover reconfiguration message to a terminal, wherein the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell wireless network temporary identifier of the terminal before handover;
s2, receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining the security configuration used by the terminal to initiate a reestablishment process according to the reestablishment request message, calculating the MACI according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI;
and S3, if the first MACI and the second MACI are judged to be consistent, sending a reestablishment message to the terminal.
In this embodiment, the execution subjects of steps S1 and S2 are both network base stations. When a network side base station initiates an intra-cell handover process, an intra-cell handover reconfiguration message is sent to a terminal, wherein the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell radio network temporary identifier of the terminal before handover. And the terminal initiates a handover access process after receiving the intra-cell handover reconfiguration message, and if the handover access fails, the terminal sends a reestablishment request message to the network side base station, wherein the reestablishment request message carries a third CRNTI and a second MACI, and the value of the third CRNTI is selected from the first CRNTI and the second CRNTI by the terminal according to a specific scene of the handover access failure. Specifically, if the terminal receives mg2 sent by the network side, but the radio link fails, the value of the first CRNTI is used as the value of the third CRNTI; and if the terminal does not receive the mg2 sent by the network side, using the value of the second CRNTI as the value of the third CRNTI. After receiving the reestablishment request message, the network side base station searches for the context of the terminal according to the reestablishment request message, determines the security configuration used by the terminal to initiate the reestablishment process according to the reestablishment request message after finding the context of the terminal, calculates the MACI according to the security configuration, compares the MACI (first MACI) obtained by calculation with the MACI (namely, second MACI) carried in the reestablishment request message, and sends a reestablishment message to the terminal if the MACI (first MACI) and the MACI (namely, second MACI) are consistent according to the comparison result, or sends a reestablishment rejection message to the terminal if the MACI (first MACI) and the MACI are inconsistent.
The method for reestablishing intra-cell handover provided in the embodiment of the present invention is that the first CRNTI and the second CRNTI carried in the intra-cell handover reconfiguration message are different, that is, the CRNTI of the terminal before handover is different from the CRNTI of the terminal after handover, and the CRNTI and the security configuration are corresponding, and the reestablishment request message sent by the terminal to the network side carries the MACI calculated by the terminal according to the security configuration and the CRNTI corresponding to the security configuration used for calculating the MACI, so that the network side can determine the security configuration corresponding to the CRNTI according to the CRNTI in the reestablishment request message sent by the terminal, that is, the terminal initiates the security configuration used in the reestablishment process, and the network side calculates the MACI according to the security configuration, so that the MACI calculated by the network side and the terminal during the security verification is consistent, the reestablishment is successful, and thus the reestablishment failure is caused by the difference between the security configurations used when the network side and the terminal calculate the MACI, the scheme can improve the success rate of switching reestablishment in the cell, does not change the protocol and can be compatible with all terminals.
On the basis of the embodiment of the method, the intra-cell handover reconfiguration message carries a first security configuration, and the reestablishment request message also carries a PCI;
after finding the context of the terminal according to the reestablishment request message, determining, according to the reestablishment request message, a security configuration used by the terminal to initiate a reestablishment process may include:
and searching the context of the terminal according to the third CRNTI and the PCI, if the context of the terminal is searched, comparing the third CRNTI with the first CRNTI and the second CRNTI respectively, and according to a comparison result, if the third CRNTI is the same as the first CRNTI, using the first security configuration as the security configuration used by the terminal in the process of initiating the reestablishment, or if the third CRNTI is the same as the second CRNTI, using the second security configuration as the security configuration used by the terminal in the process of initiating the reestablishment, wherein the second security configuration is the security configuration of the terminal before switching.
On the basis of the foregoing method embodiment, the method may further include:
and if the context of the terminal is not found according to the third CRNTI and the PCI, sending a reestablishment rejection message to the terminal.
On the basis of the foregoing method embodiment, the method may further include:
and if the first MACI and the second MACI are judged to be inconsistent, sending a reestablishment rejection message to the terminal.
Fig. 4 is a schematic flow chart of another embodiment of the method for reestablishing an intra-cell handover according to the present invention:
s130, a network side initiates intra-cell switching by sending an intra-cell switching reconfiguration message to a terminal, wherein the intra-cell switching reconfiguration message carries a new CRNTI and a new security configuration, and the new CRNTI and the new security configuration are used for updating the existing CRNTI and security configuration of the terminal by the terminal;
s131, CRNTI and security configuration before switching of the network side backup terminal;
s132, the network side receives a reestablishment request message sent by the terminal;
s133, the network side searches the context of the terminal according to the CRNTI and the PCI of the terminal carried in the reestablishment request message;
s134, the network side judges whether the terminal context is searched successfully or not, if so, the step S135 is executed, otherwise, the step S139 is executed;
s135, the network side distinguishes whether the security configuration used in the process of initiating the reestablishment by the terminal is the security configuration before the switching or the security configuration after the switching according to the CRNTI of the terminal;
s136, the network side calculates the MACI according to the distinguishing result of the security configuration;
s137, the network side compares the MACI calculated in the step S136 with the MACI carried in the reestablishment request message, and if the MACI and the MACI are consistent, the step S138 is executed, otherwise, the step S139 is executed;
s138, the network side sends a reestablishment message to the terminal through an air interface;
and S139, the network side sends a reestablishment rejection message to the terminal through an air interface.
Referring to fig. 5, the present embodiment discloses an apparatus for reestablishing an intra-cell handover, including:
a first sending unit 1, configured to send an intra-cell handover reconfiguration message to a terminal, where the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell radio network temporary identifier of the terminal before handover;
a calculating unit 2, configured to receive a reestablishment request message sent by the terminal, determine, according to the reestablishment request message, a security configuration used by the terminal to initiate a reestablishment process after finding the context of the terminal according to the reestablishment request message, calculate a MACI according to the security configuration, and use the MACI as a first MACI, where the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI;
and the second sending unit 3 is configured to send a reestablishment message to the terminal if it is determined that the first MACI and the second MACI are consistent.
Specifically, the first sending unit 1 sends an intra-cell handover reconfiguration message to a terminal, so that the terminal initiates a handover access process according to the intra-cell handover reconfiguration message; the computing unit 2 receives a reestablishment request message sent by the terminal, determines a security configuration used by the terminal to initiate a reestablishment process according to the reestablishment request message after finding the context of the terminal according to the reestablishment request message, computes a MACI according to the security configuration, and takes the MACI as a first MACI; and if the second sending unit 3 judges that the first MACI is consistent with the second MACI, sending a reestablishment message to the terminal.
In the device for reestablishing intra-cell handover provided in the embodiment of the present invention, because the first CRNTI and the second CRNTI carried in the intra-cell handover reconfiguration message are different, that is, the CRNTI of the terminal before handover is different from the CRNTI of the terminal after handover, and the CRNTI and the security configuration are corresponding, and the reestablishment request message sent by the terminal to the network side carries the MACI calculated by the terminal according to the security configuration and the CRNTI corresponding to the security configuration used for calculating the MACI, the network side can determine the security configuration corresponding to the CRNTI according to the CRNTI in the reestablishment request message sent by the terminal, that is, the terminal initiates the security configuration used in the reestablishment process, and the network side calculates the MACI according to the security configuration, so that the MACI calculated by the network side and the terminal during the security verification is consistent, the reestablishment is successful, and thus compared with the prior art in which the reestablishment failure is caused by different security configurations used when the network side and the terminal calculate the MACI, the scheme can improve the success rate of switching reestablishment in the cell, does not change the protocol and can be compatible with all terminals.
On the basis of the embodiment of the device, the intra-cell handover reconfiguration message carries a first security configuration, and the reestablishment request message also carries a PCI;
the computing unit may be specifically configured to:
and searching the context of the terminal according to the third CRNTI and the PCI, if the context of the terminal is searched, comparing the third CRNTI with the first CRNTI and the second CRNTI respectively, and according to a comparison result, if the third CRNTI is the same as the first CRNTI, using the first security configuration as the security configuration used by the terminal in the process of initiating the reestablishment, or if the third CRNTI is the same as the second CRNTI, using the second security configuration as the security configuration used by the terminal in the process of initiating the reestablishment, wherein the second security configuration is the security configuration of the terminal before switching.
On the basis of the foregoing embodiment of the apparatus, the computing unit may be further configured to:
and if the context of the terminal is not found according to the third CRNTI and the PCI, sending a reestablishment rejection message to the terminal.
On the basis of the foregoing apparatus embodiment, the second sending unit may be further configured to:
and if the first MACI and the second MACI are judged to be inconsistent, sending a reestablishment rejection message to the terminal.
Fig. 6 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 6, the electronic device may include: a processor 11, a memory 12, a bus 13, and a computer program stored on the memory 12 and executable on the processor 11;
the processor 11 and the memory 12 complete mutual communication through the bus 13;
when the processor 11 executes the computer program, the method provided by the foregoing method embodiments is implemented, for example, including: sending an intra-cell handover reconfiguration message to a terminal so that the terminal initiates a handover access process according to the intra-cell handover reconfiguration message, wherein the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell wireless network temporary identifier of the terminal before handover; receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining a security configuration used by the terminal for initiating a reestablishment process according to the reestablishment request message, calculating a MACI according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI; and if the first MACI and the second MACI are judged to be consistent, sending a reestablishment message to the terminal.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method provided by the foregoing method embodiments, and for example, the method includes: sending an intra-cell handover reconfiguration message to a terminal so that the terminal initiates a handover access process according to the intra-cell handover reconfiguration message, wherein the intra-cell handover reconfiguration message carries a first CRNTI, the first CRNTI is different from a second CRNTI, and the second CRNTI is a cell wireless network temporary identifier of the terminal before handover; receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining a security configuration used by the terminal for initiating a reestablishment process according to the reestablishment request message, calculating a MACI according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a third CRNTI and a second MACI, and the third CRNTI is the first CRNTI or the second CRNTI; and if the first MACI and the second MACI are judged to be consistent, sending a reestablishment message to the terminal.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. An intra-cell handover re-establishment method, comprising:
sending an intra-cell handover reconfiguration message to a terminal, wherein the intra-cell handover reconfiguration message carries a first cell radio network temporary identifier CRNTI, the first cell radio network temporary identifier CRNTI is different from a second cell radio network temporary identifier CRNTI, and the second cell radio network temporary identifier CRNTI is a cell radio network temporary identifier of the terminal before handover;
receiving a reestablishment request message sent by the terminal, after finding the context of the terminal according to the reestablishment request message, determining a security configuration used by the terminal to initiate a reestablishment process according to the reestablishment request message, calculating a Media Access Control Identifier (MACI) according to the security configuration, and taking the MACI as a first MACI, wherein the reestablishment request message carries a third Cell Radio Network Temporary Identifier (CRNTI) and a second MACI, and the third Cell Radio Network Temporary Identifier (CRNTI) is the first Cell Radio Network Temporary Identifier (CRNTI) or the second CRNTI;
if the first media access control identifier MACI is judged to be consistent with the second media access control identifier MACI, a reestablishment message is sent to the terminal;
if the terminal receives mg2 sent by the network side, but the radio link fails, the third cell radio network temporary identifier CRNTI is the first cell radio network temporary identifier CRNTI; if the terminal does not receive mg2 sent by the network side, the third cell radio network temporary identifier CRNTI is the second cell radio network temporary identifier CRNTI;
and the second media access control identity MACI is obtained by the terminal according to the security configuration corresponding to the third cell radio network temporary identity CRNTI.
2. The method according to claim 1, wherein the intra-cell handover reconfiguration message carries a first security configuration, and the reestablishment request message also carries a physical cell identity PCI;
after finding the context of the terminal according to the reestablishment request message, determining the security configuration used by the terminal in the reestablishment process according to the reestablishment request message includes:
searching the context of the terminal according to the third cell radio network temporary identifier CRNTI and the physical cell identifier PCI, if the context is searched, comparing the third cell radio network temporary identifier CRNTI with the first cell radio network temporary identifier CRNTI and the second cell radio network temporary identifier CRNTI respectively, according to the comparison result, if the third cell radio network temporary identifier CRNTI is the same as the first cell radio network temporary identifier CRNTI, the first security configuration is used as the security configuration used by the terminal to initiate the reestablishment process, or if the third cell radio network temporary identifier CRNTI is the same as the second cell radio network temporary identifier CRNTI, and taking the second security configuration as the security configuration used by the terminal for initiating the reestablishment process, wherein the second security configuration is the security configuration of the terminal before switching.
3. The method of claim 2, further comprising:
and if the context of the terminal is not found according to the third cell radio network temporary identifier CRNTI and the physical cell identifier PCI, sending a reestablishment rejection message to the terminal.
4. The method of claim 1, further comprising:
and if the first media access control identifier MACI is judged to be inconsistent with the second media access control identifier MACI, sending a reestablishment rejection message to the terminal.
5. An apparatus for intra-cell handover re-establishment, comprising:
a first sending unit, configured to send an intra-cell handover reconfiguration message to a terminal, where the intra-cell handover reconfiguration message carries a first cell radio network temporary identifier CRNTI, the first cell radio network temporary identifier CRNTI is different from a second cell radio network temporary identifier CRNTI, and the second cell radio network temporary identifier CRNTI is a cell radio network temporary identifier of the terminal before handover;
a computing unit, configured to receive a reestablishment request message sent by the terminal, determine, according to the reestablishment request message, a security configuration used by the terminal to initiate a reestablishment process after finding a context of the terminal according to the reestablishment request message, compute a mac i according to the security configuration, and use the mac i as a first mac i, where the reestablishment request message carries a third cell radio network temporary identifier CRNTI and a second mac i, and the third cell radio network temporary identifier CRNTI is the first cell radio network temporary identifier CRNTI or the second cell radio network temporary identifier CRNTI;
a second sending unit, configured to send a reestablishment message to the terminal if it is determined that the first mac i and the second mac i are consistent;
if the terminal receives mg2 sent by the network side, but the radio link fails, the third cell radio network temporary identifier CRNTI is the first cell radio network temporary identifier CRNTI; if the terminal does not receive mg2 sent by the network side, the third cell radio network temporary identifier CRNTI is the second cell radio network temporary identifier CRNTI;
and the second media access control identity MACI is obtained by the terminal according to the security configuration corresponding to the third cell radio network temporary identity CRNTI.
6. The apparatus according to claim 5, wherein the intra-cell handover reconfiguration message carries a first security configuration, and the reestablishment request message also carries a Physical Cell Identity (PCI);
the computing unit is specifically configured to:
searching the context of the terminal according to the third cell radio network temporary identifier CRNTI and the physical cell identifier PCI, if the context is searched, comparing the third cell radio network temporary identifier CRNTI with the first cell radio network temporary identifier CRNTI and the second cell radio network temporary identifier CRNTI respectively, according to the comparison result, if the third cell radio network temporary identifier CRNTI is the same as the first cell radio network temporary identifier CRNTI, the first security configuration is used as the security configuration used by the terminal to initiate the reestablishment process, or if the third cell radio network temporary identifier CRNTI is the same as the second cell radio network temporary identifier CRNTI, and taking the second security configuration as the security configuration used by the terminal for initiating the reestablishment process, wherein the second security configuration is the security configuration of the terminal before switching.
7. The apparatus of claim 6, wherein the computing unit is further configured to:
and if the context of the terminal is not found according to the third cell radio network temporary identifier CRNTI and the physical cell identifier PCI, sending a reestablishment rejection message to the terminal.
8. The apparatus of claim 5, wherein the second sending unit is further configured to:
and if the first media access control identifier MACI is judged to be inconsistent with the second media access control identifier MACI, sending a reestablishment rejection message to the terminal.
9. An electronic device, comprising: a processor, a memory, a bus, and a computer program stored on the memory and executable on the processor;
the processor and the memory complete mutual communication through the bus;
the processor, when executing the computer program, implements the method of any of claims 1-4.
10. A non-transitory computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, implements the method of any one of claims 1-4.
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