CN110290565B - Access layer context management method and device - Google Patents
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Abstract
The embodiment of the invention provides a method and a device for managing access layer context, wherein the method comprises the following steps: if a context change request sent by any terminal after the service cell is switched in the non-activated state is received, acquiring the previous service cell of the terminal based on the terminal identity information contained in the context change request; sending a context transmission request containing terminal identity information to a previous serving cell so that the previous serving cell can return the access stratum context of the terminal based on the terminal identity information; an access stratum context is received and saved. The method and the device provided by the embodiment of the invention ensure that the access layer context is always stored in the service cell accessed by the terminal, and the RRC connection can be directly completed through the current service cell no matter where and when the RRC connection needs to be recovered, and no extra signaling forwarding is needed, thereby reducing the signaling interaction during the RRC connection recovery, reducing the time delay, improving the RRC recovery speed and optimizing the service recovery experience.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for managing access stratum contexts.
Background
In the 5G (5th Generation, fifth Generation mobile communication network) system, compared with the 4G (4th Generation, fourth Generation mobile communication network) system, the terminal ue (user equipment) has a difference in RRC (Radio Resource Control) state design.
In the 4G system, the RRC state of the terminal includes two states, namely, an IDLE state (RRC _ IDLE) and a CONNECTED state (RRC _ CONNECTED), and in the 5G system, the RRC state of the terminal includes three states, namely, an IDLE state, a CONNECTED state and an INACTIVE state (RRC _ INACTIVE). In the 4G system, the terminal maintains the AS (access stratum) context only in the RRC _ CONNECTED state, whereas in the 5G system, the terminal maintains the INACTIVE AS context in both the RRC _ INACTIVE and active access stratum contexts in the RRC _ CONNECTED state.
In the 5G system, when the terminal is in the RRC _ INACTIVE state, the terminal actively initiates RRC connection recovery due to uplink and downlink service requirements, or the 5GC (5G core network) performs RAN Paging to trigger the terminal to initiate an RRC connection recovery process. In the process that the terminal actively initiates the RRC connection recovery, because the terminal has mobility, when the terminal moves to a new cell, the access layer context is stored in a previous service cell, the terminal does not store the access layer context in the new cell, the RRC connection cannot be directly recovered through the new cell, and signaling needs to be forwarded to the previous service cell of the terminal through an internal interface or an Xn (inter-base station interface) interface of a base station to which the new cell belongs, and the previous service cell recovers the RRC connection of the new cell.
It can be seen that, due to the mobility of the terminal, the new cell where the terminal resides does not store the access stratum context, which results in signaling forwarding required for RRC connection recovery, complex flow, high signaling overhead, and high service recovery delay.
Disclosure of Invention
The embodiment of the invention provides a method and a device for managing access layer context, which are used for solving the problems of complex flow, high signaling overhead and high service recovery time delay in the existing process of initiating RRC connection recovery by a terminal.
In a first aspect, an embodiment of the present invention provides an access stratum context management method, including:
if a context change request sent by any terminal after the service cell is switched in an inactive state is received, acquiring a previous service cell of any terminal based on terminal identity information contained in the context change request;
sending a context transmission request containing the terminal identity information to the previous serving cell so that the previous serving cell can return the access stratum context of any terminal based on the terminal identity information;
receiving and saving the access stratum context.
Preferably, the sending a context transmission request including the terminal identity information to the previous serving cell so that the previous serving cell can return an access stratum context of any terminal based on the terminal identity information specifically includes:
if the previous service cell is judged to belong to the current base station, sending a context transmission request containing the terminal identity information to the previous service cell based on an internal communication mechanism, so that the previous service cell can return the access layer context of any terminal based on the terminal identity information;
and if the previous service cell is judged and known not to belong to the current base station, sending a context transmission request containing the terminal identity information to the base station to which the previous service cell belongs through an Xn interface, so that the base station to which the previous service cell belongs can return the access layer context of any terminal based on the terminal identity information.
Preferably, the receiving and saving the access stratum context further comprises:
sending a context release message to the previous serving cell to enable the previous serving cell to release the access stratum context.
Preferably, the receiving and saving the access stratum context further comprises
Updating source cell information contained in the access stratum context; the source cell information comprises PhysCellId and C-RNTI;
and sending a context change response message containing the source cell information to any terminal.
Preferably, the sending the context change response message including the source cell information to the any terminal specifically includes:
if the previous service cell does not belong to the current base station, updating the terminal identity information of any terminal;
updating the updated terminal identity information and the updated source cell information to the access stratum context;
and sending a context change response message containing the updated terminal identity information and the updated source cell information to any terminal.
In a second aspect, an embodiment of the present invention provides an access stratum context management method, including:
judging whether the service cell switching occurs or not in the non-activated state;
if the service cell switching occurs, sending a context change request containing terminal identity information to a current base station so that the current base station can acquire a previous service cell of a terminal based on the terminal identity information, sending a context transmission request containing the terminal identity information to the previous service cell, and receiving and storing an access layer context of the terminal returned by the previous service cell based on the terminal identity information.
In a third aspect, an embodiment of the present invention provides an access stratum context management apparatus, including:
a change request receiving unit, configured to, if a context change request sent after a serving cell is switched by any terminal in an inactive state is received, obtain a previous serving cell of the any terminal based on terminal identity information included in the context change request;
a transmission request sending unit, configured to send a context transmission request including the terminal identity information to the previous serving cell, so that the previous serving cell can return an access stratum context of the any terminal based on the terminal identity information;
and the context storage unit is used for receiving and storing the access layer context.
In a fourth aspect, an embodiment of the present invention provides an apparatus for access stratum context management, including:
the judging unit is used for judging whether the service cell switching occurs or not in the non-activated state;
the triggering unit is used for sending a context change request containing terminal identity information to a current base station if service cell switching occurs, so that the current base station can obtain a previous service cell of a terminal based on the terminal identity information, sending a context transmission request containing the terminal identity information to the previous service cell, and receiving and storing an access layer context of the terminal returned by the previous service cell based on the terminal identity information.
In a fifth aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a bus, where the processor and the communication interface, the memory complete communication with each other through the bus, and the processor may call logic instructions in the memory to perform the steps of the method as provided in the first aspect or the second aspect.
In a sixth aspect, embodiments of the present invention provide a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first or second aspect.
According to the access layer context management method and device provided by the embodiment of the invention, when a terminal is switched between service cells in an inactive state, an access layer context change request is triggered, and a current base station acquires and stores the access layer context through a previous service cell, so that the access layer context is always and synchronously stored in the service cell accessed by the terminal.
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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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating an access stratum context management method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an access stratum context management method according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating an access stratum context management method when a current serving cell and a previous serving cell belong to the same base station according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating an access stratum context management method when a current serving cell and a previous serving cell belong to different base stations according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of RRC connection recovery according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an access stratum context management apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an access stratum context management apparatus according to another embodiment of the present invention;
fig. 8 is a schematic structural 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 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 some, but not all, embodiments of the present invention. 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.
Due to the mobility of the terminal, the new cell where the terminal resides does not store the access stratum context, so that signaling forwarding is required for RRC connection recovery, the flow is complex, the signaling overhead is high, and the service recovery delay is high. In view of the above, an embodiment of the present invention provides an access stratum context management method. Fig. 1 is a flowchart illustrating an access stratum context management method according to an embodiment of the present invention, as shown in fig. 1, the method includes:
Specifically, when any terminal is in an INACTIVE state, that is, in an RRC _ INACTIVE state, if a serving cell handover occurs, a context change request is sent to a serving cell after the handover, that is, a base station to which a current serving cell belongs. Here, the context change request is used to instruct the base station in the current serving cell to acquire an access stratum context, i.e., an AS context, of the terminal from a serving cell accessed by the terminal before the serving cell is handed over, i.e., a previous serving cell. The context change request includes terminal identity information of the terminal, and the terminal identity information is an identity of the terminal.
After receiving a context change request sent by any terminal, a base station to which a current serving cell belongs can know that the terminal is switched to the current serving cell and the terminal is in an inactive state. And then, the base station to which the current service cell belongs extracts the terminal identity information from the context change request, and acquires the previous service cell of the terminal based on the terminal identity information.
Specifically, after obtaining the previous serving cell of the terminal, a context transmission request is sent to the previous serving cell of the terminal. Here, the context transmission request is used to instruct the previous serving cell of the terminal to return the access stratum context of the terminal, so as to realize the transmission of the access stratum context from the previous serving cell to the current serving cell. The context transfer request also includes terminal identity information.
After receiving the context transmission request, the previous serving cell may extract the terminal identity information from the context transmission request, immediately obtain an access layer context corresponding to the terminal based on the terminal identity information, and return the access layer context to the base station to which the current cell of the terminal belongs.
Specifically, the access stratum context of the terminal returned by the previous serving cell is received and saved.
According to the method provided by the embodiment of the invention, after the terminal is switched between the service cells in the non-activated state, the access layer context is obtained and stored through the previous service cell, so that the access layer context is always and synchronously stored in the service cell accessed by the terminal, and the RRC connection can be directly completed through the current service cell no matter where and when the RRC connection needs to be recovered, no extra signaling forwarding is needed, the signaling interaction during the RRC connection recovery is reduced, the time delay is greatly reduced, the RRC recovery speed is improved, and the service recovery experience is optimized.
Based on the foregoing embodiment, in the method, step 120 specifically includes: if the previous service cell is judged and known to belong to the current base station, sending a context transmission request containing terminal identity information to the previous service cell based on an internal communication mechanism, so that the previous service cell can return to the access layer context of the terminal based on the terminal identity information; and if the previous service cell is judged and known not to belong to the current base station, sending a context transmission request containing terminal identity information to the base station to which the previous service cell belongs through an Xn interface, so that the base station to which the previous service cell belongs can return the access layer context of the terminal based on the terminal identity information.
Specifically, after the previous serving cell is obtained, it needs to be determined whether the previous serving cell belongs to the base station to which the current serving cell belongs, that is, the current base station, so as to determine a signaling transmission mode for the previous serving cell:
if the previous service cell is judged to belong to the current base station, namely the previous service cell and the current service cell belong to the same base station, the current base station carries out access layer context migration in the station, namely the current base station sends a context transmission request to the previous service cell in the station through an internal communication mechanism, and after receiving the context transmission request, the previous service cell acquires a corresponding access layer context based on terminal identity information in the context transmission request and returns the access layer context through the internal communication mechanism;
and if the previous service cell is judged and known not to belong to the current base station, namely the previous service cell and the current service cell belong to different base stations, the current base station initiates the context transfer of an access layer between the base stations, namely the current base station sends a context transmission request to the base station to which the previous service cell belongs through an Xn interface. The context transmission request here needs to include not only the terminal identity information but also the target base station identifier, which is the base station to which the previous serving cell belongs. After receiving the context transmission request, the previous serving cell base station acquires the corresponding access layer context based on the terminal identity information in the context transmission request, and returns the access layer context through the Xn interface.
Based on any embodiment, the method further includes, after the step 130: a context release message is sent to the previous serving cell to enable the previous serving cell to release the access stratum context.
Specifically, after the base station to which the current serving cell belongs receives the access stratum context of any terminal returned by the previous serving cell, the transmission process of the access stratum context for the terminal is completed. At this point, the previous serving cell does not need to store the access stratum context of the terminal any more. Therefore, after confirming that the access layer context of any terminal sent by the previous serving cell is received, the base station to which the current serving cell belongs sends a context release message to the previous serving cell, wherein the context release message is used for informing the previous serving cell that the current serving cell has received the access layer context and instructing the previous serving cell to release the access layer context. Here, the context release message also includes the terminal identity information.
And after receiving the context release message, the previous service cell extracts the terminal identity information from the context release message and releases the access layer context corresponding to the terminal identity information.
Based on any embodiment, the method further includes, after the step 130: step 141, updating the source cell information contained in the access stratum context; the source cell information comprises PhysCellId and C-RNTI; step 142, sending a context change response message containing the active cell information to the terminal.
Specifically, after receiving the access stratum context of any terminal returned by the previous serving cell, the base station to which the current serving cell belongs issues a context change response message to the terminal to notify that the terminal context change request has been executed and the access stratum context has been transmitted.
In addition, PhysCellId and C-RNTI contained in the access stratum context are updated. Wherein PhysCellId represents the physical ID of the report cell, and C-RNTI (cell Radio Network Temporary identifier) represents the cell Radio Network Temporary identifier of the terminal. After obtaining the context of the access layer, updating PhysCellId in the context of the access layer to the physical ID of the current service cell, reconfiguring C-RNTI for the terminal based on the current physical cell, including the updated PhysCellId and C-RNTI in a context change response message, sending the context change response message to the terminal, informing the terminal that the context change of the access layer is completed, and sending the updated PhysCellId and C-RNTI to the terminal so as to unify the PhysCellId and C-RNTI on the terminal side and the base station side.
Based on any of the above embodiments, in this method, step 142 specifically includes: if the previous service cell does not belong to the current base station, updating the terminal identity information of the terminal; updating the updated terminal identity information and the source cell information into an access layer context; and sending a context change response message containing the updated terminal identity information and the source cell information to the terminal.
Specifically, if the previous serving cell does not belong to the current base station, the terminal identity information of the terminal needs to be updated, the base station information indicated in the terminal identity information is updated from the base station of the previous serving cell to the current base station, the updated terminal identity information and the source cell information of the current serving cell are updated to the access stratum context received in step 130, a context change response message including the updated terminal identity information and the source cell information is generated, the context change response message is sent to the terminal, and the updated terminal identity information and the updated source cell information are sent to the terminal while the terminal is informed that the context change of the access stratum is completed, so as to unify the terminal identity information and the source cell information of the terminal side and the base station side.
Based on any of the above embodiments, fig. 2 is a schematic flowchart of a method for managing an access stratum context according to another embodiment of the present invention, as shown in fig. 2, the method includes:
Specifically, the terminal determines whether serving cell handover currently occurs in real time in an INACTIVE state, i.e., in an RRC _ INACTIVE state.
Specifically, if it is determined that the serving cell handover currently occurs is known, a context change request is sent to the current base station. Here, the current base station is a base station to which the current serving cell belongs, and the current serving cell is a serving cell after the serving cell is switched. The context change request is used to instruct the base station in the current serving cell to acquire the access layer context, i.e. the AS context, of the terminal from the serving cell accessed before the terminal performs the serving cell handover, i.e. the previous serving cell. The context change request includes terminal identity information of the terminal, and the terminal identity information is an identity of the terminal.
After receiving the context change request sent by the terminal, the current base station can know that the terminal is switched to the current serving cell and the terminal is in an inactive state. And then, the current base station extracts the terminal identity information from the context change request and acquires the previous service cell of the terminal based on the terminal identity information. After obtaining the previous serving cell of the terminal, the current base station sends a context transmission request to the previous serving cell of the terminal. Here, the context transmission request is used to instruct the previous serving cell of the terminal to return the access stratum context of the terminal, so as to realize the transmission of the access stratum context from the previous serving cell to the current serving cell. The context transfer request also includes terminal identity information.
After receiving the context transmission request, the previous serving cell may extract the terminal identity information from the context transmission request, immediately obtain an access stratum context corresponding to the terminal based on the terminal identity information, and return the access stratum context to the current base station. And the current base station receives and stores the access layer context returned by the previous service cell so as to realize the change of the access layer context.
According to the method provided by the embodiment of the invention, when the service cell is switched in the non-activated state, the terminal triggers the access layer context change request, and the current base station acquires and stores the access layer context through the previous service cell, so that the access layer context is always and synchronously stored in the service cell accessed by the terminal, and the access layer context can be directly completed through the current service cell no matter where and when the RRC connection needs to be recovered, without extra signaling forwarding, thereby reducing the signaling interaction during the recovery of the RRC connection, greatly reducing the time delay, improving the recovery speed of the RRC, and optimizing the service recovery experience.
Based on any of the above embodiments, fig. 3 is a flowchart illustrating an access stratum context management method when a current serving cell and a previous serving cell belong to the same base station according to an embodiment of the present invention, as shown in fig. 3, where the method includes:
step 301, when the terminal is in RRC _ INACTIVE state, the terminal performs serving cell handover due to mobility, and when the terminal resides in a new cell through cell reselection, the terminal initiates a context change request. Here, the new cell is the current serving cell.
The context change request at least includes terminal Identity information, i.e. I-RNTI (Inactive-Radio Network temporary Identity, Radio Network temporary Identity in an Inactive state) information, to identify the Identity information of the terminal in the RRC _ Inactive state, and to identify the Identity information of the terminal and the Identity information of the base station where the previous serving cell is located at the Network side.
Step 302, after receiving the context change request, the current base station parses the I-RNTI information.
And step 303, the current base station acquires the identity information of the base station where the previous service cell is located according to the I-RNTI information, and stores the relevant information in the current base station.
Step 304, the current base station recognizes that the current serving cell where the terminal resides and the previous serving cell belong to the same base station, and initiates a context transmission request through an internal communication mechanism.
Here, the context transmission request at least includes I-RNTI information, so that the previous serving cell can identify the terminal identity and match the access stratum context.
And 305, after receiving the context transmission request, the previous serving cell identifies the terminal according to the I-RNTI information, and transmits the context of the access layer related to the terminal to the current serving cell in the context transmission response message.
And if the previous service cell can not identify the identity of the terminal according to the I-RNTI information, confirming that the I-RNTI information is invalid, and ending the process.
Here, one or more of I-RNTI information, radio bearer configuration, MCG information, and measurement configuration information are included in the AS context transfer response message.
Step 306, in the current base station, after the current serving cell receives the context transmission response message, the access layer context is extracted from the current serving cell, and the received access layer context is stored in the cell by using the I-RNTI information as an identifier.
Step 307, in the current base station, the current serving cell updates the source cell information contained in the access stratum context; the source cell information includes PhysCellId and C-RNTI.
And step 308, the current base station sends a context change response message to the terminal through an air interface, wherein the context change establishment message comprises source cell information.
Step 309, the terminal receives the context change response message through the air interface, updates the source cell information, and sends a context change completion message to the current base station through the air interface.
Step 310, the current base station receives the context change completion message, and updates the source cell information temporarily stored in the current serving cell to the corresponding terminal access layer context.
Step 311, the current base station sends a context release message to the previous serving cell through the current serving cell, so as to release the access layer context originally stored in the previous serving cell.
The context release message contains at least I-RNTI information to facilitate the identity of the terminal to the previous serving cell.
Step 312, after the previous serving cell receives the context release message, it extracts the I-RNTI information, identifies the terminal identity, and releases the stored access layer context information.
And if the previous service cell can not identify the terminal identity according to the I-RNTI information, confirming that the I-RNTI information is invalid, ignoring the context release message, and ending the process.
Based on any of the above embodiments, fig. 4 is a flowchart illustrating an access stratum context management method when a current serving cell and a previous serving cell belong to different base stations according to an embodiment of the present invention, as shown in fig. 4, the method includes:
step 401, when the terminal is in RRC _ INACTIVE state, the terminal performs serving cell handover due to mobility, and when the terminal resides in a new cell through cell reselection, the terminal initiates a context change request. Here, the new cell is the current serving cell.
The context change request at least includes terminal Identity information, i.e. I-RNTI (Inactive-Radio Network temporary Identity, Radio Network temporary Identity in an Inactive state) information, to identify the Identity information of the terminal in the RRC _ Inactive state, and to identify the Identity information of the terminal and the Identity information of the base station where the previous serving cell is located at the Network side.
Step 402, after the current base station receives the context change request, the current base station analyzes the I-RNTI information.
Step 403, the current base station obtains the identity information of the base station where the previous serving cell is located according to the I-RNTI information, and stores the relevant information in the current base station.
In step 404, if the current base station recognizes that the current serving cell where the terminal resides and the previous serving cell belong to different base stations, the current base station initiates a context transmission request to the previous base station through the Xn interface. Here, the previous base station is the base station to which the previous serving cell belongs.
The context transmission request at least contains Global gNB ID (Global gNB identity) I-RNTI information of the previous base station, wherein the Global gNB ID is composed of PLMN (Public Land Mobile Network) + gNB (5G base station) ID.
Step 405, after receiving the context transmission request, the previous base station performs terminal identity identification according to the I-RNTI information, and transmits the access layer context related to the terminal to the current base station in the context transmission response message.
And if the previous base station can not identify the identity of the terminal according to the I-RNTI information, confirming that the I-RNTI information is invalid, and ending the process.
Here, the AS context transfer response message includes one or more of a previous base station Global gbb ID, I-RNTI information, radio bearer configuration, MCG information, and measurement configuration information.
And step 406, after receiving the context transmission response message, the current base station extracts the access layer context from the context transmission response message, and stores the received access layer context in the current serving cell by using the I-RNTI information as an identifier.
Step 407, the current base station updates the I-RNTI information and updates the source cell information contained in the access stratum context; the source cell information includes PhysCellId and C-RNTI.
And step 408, the current base station sends a context change response message to the terminal through an air interface, and the context change establishment message comprises the updated I-RNTI information and the source cell information.
Step 409, the terminal receives the context change response message through the air interface, updates the I-RNTI information and the source cell information, and sends a context change completion message to the current base station through the air interface.
Step 410, the current base station receives the context change completion message, and updates the I-RNTI information and the source cell information temporarily stored in the current serving cell to the access layer context of the corresponding terminal.
Step 411, the current base station sends a context release message to the previous base station to release the access stratum context originally stored in the previous serving cell in the previous base station.
The context release message at least contains Global gNB ID and I-RNTI information of the previous base station so as to facilitate the previous base station to identify the terminal identity.
Step 412, after receiving the context release message, the previous base station extracts the I-RNTI information, identifies the terminal identity, and releases the stored access layer context information.
And if the previous base station can not identify the terminal identity according to the I-RNTI information, confirming that the I-RNTI information is invalid, ignoring the context release message, and ending the process.
Based on any of the above embodiments, fig. 5 is a schematic flowchart of RRC connection recovery provided by the embodiment of the present invention, and as shown in fig. 5, the RRC connection recovery flow includes:
step 501, when the terminal is in the RRC _ INACTIVE state, if the RRC connection needs to be restored, an RRC restoration request is sent to the current base station. Before that, when the terminal resides in the current service cell through cell reselection, the terminal sends a context change message to the current base station to trigger the current base station to acquire the access layer context of the terminal from the previous service cell. Thus, the current serving cell now has the access stratum context of the terminal stored therein.
Step 502, after receiving the RRC recovery request sent by the terminal, the current base station recovers the RRC connection of the terminal based on the access stratum context previously migrated from the previous serving cell. The RRC state of the terminal transitions from RRC _ INACTIVE to RRC _ CONNECTED.
In step 503, after recovering the RRC connection, the terminal sends an RRC recovery complete message to the current base station.
In step 504, the current bs sends a path switch request to an AMF (Core Access and Mobility Management Function) system.
In step 505, the AMF returns a path switch request acknowledgement message to the current base station.
Different from the current RRC connection recovery process, the RRC connection recovery process provided by the embodiment of the present invention does not need signaling forwarding in or between base stations, and can be directly completed through the current serving cell whenever and wherever RRC connection needs to be recovered, thereby reducing signaling interaction during RRC connection recovery, greatly reducing time delay, improving RRC recovery speed, and optimizing service recovery experience.
Based on any of the above embodiments, fig. 6 is a schematic structural diagram of an access stratum context management apparatus according to an embodiment of the present invention, as shown in fig. 6, the apparatus includes a change request receiving unit 610, a transmission request sending unit 620, and a context storing unit 630;
the change request receiving unit 610 is configured to, if a context change request sent after a serving cell is switched by any terminal in an inactive state is received, obtain a previous serving cell of the any terminal based on terminal identity information included in the context change request;
the transmission request sending unit 620 is configured to send a context transmission request including the terminal identity information to the previous serving cell, so that the previous serving cell can return an access stratum context of the any terminal based on the terminal identity information;
the context storage unit 630 is used for receiving and storing the access stratum context.
According to the device provided by the embodiment of the invention, after the terminal is switched between the service cells in the non-activated state, the context of the access layer is obtained and stored through the previous service cell, so that the context of the access layer is always and synchronously stored in the service cell accessed by the terminal, and the RRC connection can be directly completed through the current service cell no matter where and when the RRC connection needs to be recovered, no extra signaling forwarding is needed, the signaling interaction during the RRC connection recovery is reduced, the time delay is greatly reduced, the RRC recovery speed is improved, and the service recovery experience is optimized.
Based on any of the above embodiments, the transmission request sending unit 620 is specifically configured to:
if the previous service cell is judged to belong to the current base station, sending a context transmission request containing the terminal identity information to the previous service cell based on an internal communication mechanism, so that the previous service cell can return the access layer context of any terminal based on the terminal identity information;
and if the previous service cell is judged and known not to belong to the current base station, sending a context transmission request containing the terminal identity information to the base station to which the previous service cell belongs through an Xn interface, so that the base station to which the previous service cell belongs can return the access layer context of any terminal based on the terminal identity information.
According to any of the above embodiments, the apparatus further comprises a releasing unit;
the release unit is configured to send a context release message to the previous serving cell, so that the previous serving cell can release the access stratum context.
Based on any of the above embodiments, the apparatus further includes a source cell updating unit and a change responding unit;
the source cell updating unit is used for updating the source cell information contained in the access stratum context; the source cell information comprises PhysCellId and C-RNTI;
the change response unit is configured to send a context change response message including the source cell information to the any terminal.
Based on any of the embodiments described above, the change response unit is specifically configured to:
if the previous service cell does not belong to the current base station, updating the terminal identity information of any terminal;
updating the updated terminal identity information and the updated source cell information to the access stratum context;
and sending a context change response message containing the updated terminal identity information and the updated source cell information to any terminal.
Based on any of the above embodiments, fig. 7 is a schematic structural diagram of an access stratum context management apparatus according to another embodiment of the present invention, as shown in fig. 7, the apparatus includes a determining unit 710 and a triggering unit 720;
the determining unit 710 is configured to determine whether a serving cell handover occurs in an inactive state;
the triggering unit 720 is configured to send a context change request including terminal identity information to a current base station if a serving cell is switched, so that the current base station can obtain a previous serving cell of a terminal based on the terminal identity information, send a context transmission request including the terminal identity information to the previous serving cell, and receive and store an access stratum context of the terminal returned by the previous serving cell based on the terminal identity information.
The device provided by the embodiment of the invention triggers the access layer context change request when the service cell is switched in the non-activated state, and the current base station acquires and stores the access layer context through the previous service cell, so that the access layer context is always and synchronously stored in the service cell accessed by the terminal, and the RRC connection can be directly completed through the current service cell no matter where and when the RRC connection needs to be restored, without extra signaling forwarding, thereby reducing the signaling interaction during the RRC connection restoration, greatly reducing the time delay, improving the RRC restoration speed and optimizing the service restoration experience.
Fig. 8 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 8, the electronic device may include: a processor (processor)801, a communication Interface (Communications Interface)802, a memory (memory)803 and a communication bus 804, wherein the processor 801, the communication Interface 802 and the memory 803 complete communication with each other through the communication bus 804. The processor 801 may invoke a computer program stored on the memory 803 and executable on the processor 801 to perform the access stratum context management methods provided by the various embodiments described above, including, for example: if a context change request sent by any terminal after the service cell is switched in an inactive state is received, acquiring a previous service cell of any terminal based on terminal identity information contained in the context change request; sending a context transmission request containing the terminal identity information to the previous serving cell so that the previous serving cell can return the access stratum context of any terminal based on the terminal identity information; receiving and saving the access stratum context.
Further, the processor 801 may also call a computer program stored on the memory 803 and operable on the processor 801 to perform the access stratum context management method provided by the above embodiments, for example, including: judging whether the service cell switching occurs or not in the non-activated state; if the service cell switching occurs, sending a context change request containing terminal identity information to a current base station so that the current base station can acquire a previous service cell of a terminal based on the terminal identity information, sending a context transmission request containing the terminal identity information to the previous service cell, and receiving and storing an access layer context of the terminal returned by the previous service cell based on the terminal identity information.
In addition, the logic instructions in the memory 803 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in 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), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the method for managing access stratum context provided in the foregoing embodiments when executed by a processor, and the method includes: if a context change request sent by any terminal after the service cell is switched in an inactive state is received, acquiring a previous service cell of any terminal based on terminal identity information contained in the context change request; sending a context transmission request containing the terminal identity information to the previous serving cell so that the previous serving cell can return the access stratum context of any terminal based on the terminal identity information; receiving and saving the access stratum context.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the method for managing access stratum context provided in the foregoing embodiments when executed by a processor, and the method includes: judging whether the service cell switching occurs or not in the non-activated state; if the service cell switching occurs, sending a context change request containing terminal identity information to a current base station so that the current base station can acquire a previous service cell of a terminal based on the terminal identity information, sending a context transmission request containing the terminal identity information to the previous service cell, and receiving and storing an access layer context of the terminal returned by the previous service cell based on the terminal identity information.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An access stratum context management method, comprising:
if a context change request sent by any terminal after the service cell is switched in an inactive state is received, acquiring a previous service cell of any terminal based on terminal identity information contained in the context change request;
sending a context transmission request containing the terminal identity information to the previous serving cell so that the previous serving cell can return the access stratum context of any terminal based on the terminal identity information;
receiving and storing the access stratum context;
the terminal identity information is wireless network temporary identification information in an inactive state.
2. The method for access stratum context management according to claim 1, wherein the sending the context transmission request including the terminal identity information to the previous serving cell so that the previous serving cell can return the access stratum context of any terminal based on the terminal identity information specifically includes:
if the previous service cell is judged to belong to the current base station, sending a context transmission request containing the terminal identity information to the previous service cell based on an internal communication mechanism, so that the previous service cell can return the access layer context of any terminal based on the terminal identity information;
and if the previous service cell is judged and known not to belong to the current base station, sending a context transmission request containing the terminal identity information to the base station to which the previous service cell belongs through an Xn interface, so that the base station to which the previous service cell belongs can return the access layer context of any terminal based on the terminal identity information.
3. The method of claim 1, wherein the receiving and saving the access stratum context further comprises:
sending a context release message to the previous serving cell to enable the previous serving cell to release the access stratum context.
4. The method of claim 1, wherein the receiving and saving the access stratum context further comprises:
updating source cell information contained in the access stratum context; the source cell information comprises PhysCellId and C-RNTI;
and sending a context change response message containing the source cell information to any terminal.
5. The method for access stratum context management according to claim 4, wherein the sending the context change response message including the source cell information to the any terminal specifically includes:
if the previous service cell does not belong to the current base station, updating the terminal identity information of any terminal;
updating the updated terminal identity information and the updated source cell information to the access stratum context;
and sending a context change response message containing the updated terminal identity information and the updated source cell information to any terminal.
6. An access stratum context management method, comprising:
judging whether the service cell switching occurs or not in the non-activated state;
if the service cell switching occurs, sending a context change request containing terminal identity information to a current base station so that the current base station can acquire a previous service cell of a terminal based on the terminal identity information, sending a context transmission request containing the terminal identity information to the previous service cell, and receiving and storing an access layer context of the terminal returned by the previous service cell based on the terminal identity information;
the terminal identity information is wireless network temporary identification information in an inactive state.
7. An access stratum context management apparatus, comprising:
a change request receiving unit, configured to, if a context change request sent after a serving cell is switched by any terminal in an inactive state is received, obtain a previous serving cell of the any terminal based on terminal identity information included in the context change request;
a transmission request sending unit, configured to send a context transmission request including the terminal identity information to the previous serving cell, so that the previous serving cell can return an access stratum context of the any terminal based on the terminal identity information;
the context storage unit is used for receiving and storing the access layer context;
the terminal identity information is wireless network temporary identification information in an inactive state.
8. An access stratum context management apparatus, comprising:
the judging unit is used for judging whether the service cell switching occurs or not in the non-activated state;
a triggering unit, configured to send a context change request including terminal identity information to a current base station if serving cell handover occurs, so that the current base station can obtain a previous serving cell of a terminal based on the terminal identity information, send a context transmission request including the terminal identity information to the previous serving cell, and receive and store an access stratum context of the terminal returned by the previous serving cell based on the terminal identity information;
the terminal identity information is wireless network temporary identification information in an inactive state.
9. 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 steps of the access stratum context management method according to any of claims 1 to 6 are implemented by the processor when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, performs the steps of the access stratum context management method according to any one of claims 1 to 6.
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