CN114126047B - Paging method and device - Google Patents
Paging method and device Download PDFInfo
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- CN114126047B CN114126047B CN202010889098.6A CN202010889098A CN114126047B CN 114126047 B CN114126047 B CN 114126047B CN 202010889098 A CN202010889098 A CN 202010889098A CN 114126047 B CN114126047 B CN 114126047B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/026—Route selection considering the moving speed of individual devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention provides a paging method and a paging device. The method comprises the following steps: when a target user equipment is in an idle state and a core network receives a target service, acquiring a pre-recorded moving speed of the target user equipment in a last connection state; sending a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, wherein the paging message is used for indicating to page the target user equipment; and sending the paging message to a second target base station connected with the target user equipment last time when the moving speed is smaller than the first preset threshold value. Therefore, the scheme of the invention can improve the paging success rate to a certain extent, and further can shorten the paging time to a certain extent.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a paging method and apparatus.
Background
6G will be "fifth Generation mobile communication technology (5 th-Generation, 5G) + satellite network", i.e. integrating the satellite network on a 5G basis to achieve global coverage. The satellite communication network architecture and protocol flow refer to the 3gpp 5G protocol specification.
The height of the low-orbit satellite system from the ground is between 700km and 1600km, and the running speed of the satellite is very high, so that the service time of a single satellite for a user is very short, which is only about 10 minutes.
In addition, while the satellite terminal updates its own position information to the system according to a certain position update policy while moving, since both the satellite terminal and the satellite are constantly moving, and therefore, position paging and position updating are not completely synchronized, the position information of the satellite terminal updated in the system may not necessarily be the latest position information thereof, and therefore, there is a possibility that paging to the satellite terminal fails, and re-paging causes an increase in service delay.
In addition, in the terrestrial mobile system, after the paging fails, the whole network paging is performed, and after 5 seconds, the delay of the service is greatly influenced.
Therefore, in the satellite communication system, due to the mobility of the satellite terminal and the satellite, the success rate of paging the satellite terminal is low, and the paging time delay is long.
Disclosure of Invention
Embodiments of the present invention provide a paging method and apparatus, so as to solve the problem in the prior art that in a satellite communication system, due to mobility of a satellite terminal and a satellite, a success rate of paging the satellite terminal is low, and thus a paging delay is long.
In a first aspect, an embodiment of the present invention provides a paging method, which is applied to a core network, and the method includes:
when a target user equipment is in an idle state and a core network receives a target service, acquiring a pre-recorded moving speed of the target user equipment in a last connection state;
sending a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, wherein the paging message is used for indicating to page the target user equipment;
and sending the paging message to a second target base station connected with the target user equipment last time when the moving speed is smaller than the first preset threshold value.
In a second aspect, an embodiment of the present invention further provides a paging apparatus, which is applied to a core network, where the apparatus includes:
a moving speed obtaining module, configured to obtain, when a target user equipment is in an idle state and a core network receives a target service, a pre-recorded moving speed of the target user equipment when the target user equipment is in a connected state last time;
a first paging module, configured to send a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, where the paging message is used to instruct to page the target user equipment;
and a second paging module, configured to send the paging message to a second target base station to which the target user equipment is connected last time when the moving speed is smaller than the first preset threshold.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps in the paging method as described above when executing the computer program.
In a fourth aspect, the present invention further provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the steps in the paging method as described above.
In the embodiment of the invention, when the target user equipment is in an idle state, if the core network receives a target service and needs to page the target user equipment, the core network can acquire the pre-recorded moving speed of the target user equipment when the target user equipment is in a connection state last time, so that when the moving speed is greater than or equal to a first preset threshold value, the core network sends a paging message for indicating to page the target user equipment to a first target base station connected with the core network, and when the moving speed is less than the first preset threshold value, the core network sends a paging message for indicating to page the target user equipment to a second target base station connected with the target user equipment last time.
When the moving speed of the target user equipment in the last connection state is greater than a first preset threshold, the position of the target user equipment when the core network receives the target service is far away from the position of the target user equipment in the last connection state, which indicates that the target user equipment may be out of the coverage range of a second target base station connected to the target user equipment at the moment; and when the moving speed of the target user equipment in the last connection state is smaller than the first preset threshold, and the core network receives the target service this time, the position of the target user equipment is closer to the position of the target user equipment in the last connection state, which indicates that the target user equipment may still be in the coverage area of the second target base station connected last time. Therefore, the embodiment of the invention can execute different paging strategies according to the moving speed of the target user equipment in the connection state last time, thereby improving the paging success rate to a certain extent and further shortening the paging time to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart illustrating steps of a paging method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a geographical location reporting procedure according to an embodiment of the present invention;
fig. 3 is a flowchart of a specific implementation of a paging method according to an embodiment of the present invention;
fig. 4 is a second flowchart of a paging method according to an embodiment of the present invention;
fig. 5 is a third flowchart of a specific implementation of a paging method according to an embodiment of the present invention;
fig. 6 is a fourth flowchart of a specific implementation of the paging method according to the embodiment of the present invention;
fig. 7 is a fifth flowchart of a paging method according to an embodiment of the present invention;
fig. 8 is a block diagram of a paging device according to an embodiment of the present invention;
fig. 9 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, 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.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
As shown in fig. 1, an embodiment of the present invention provides a paging method, which is applied to a core network, where the core network may be a satellite core network, and the method may include the following steps:
step 101: when the target user equipment is in an idle state and a core network receives a target service, the pre-recorded moving speed of the target user equipment in the last connection state is obtained.
Optionally, the target user equipment is a satellite terminal.
When the target user equipment is in an idle state and the core network receives the target service, the position of the target user equipment in a connected state last time, and the distance between the position of the target user equipment and the position of the target user equipment in a connected state last time are related to the moving speed of the target user equipment in a connected state last time. And when the target user equipment is in an idle state, if the core network receives the target service, the core network cannot know the specific position of the target user equipment at the moment, so that the distance between the position of the target user equipment at the moment and the position of the target user equipment at the last time in a connection state can be predicted according to the moving speed of the target user equipment at the last time in the connection state.
Step 102: and sending a paging message to a first target base station connected with the core network under the condition that the moving speed is greater than or equal to a first preset threshold value.
Wherein the paging message is used for indicating paging of the target user equipment.
When the moving speed of the target ue in the last connection state is greater than the first preset threshold, the location of the target ue when the core network receives the target service this time is far from the location of the target ue in the last connection state, which indicates that the target ue may be out of the coverage of the second target base station connected to the core network at the time. In the embodiment of the application, under the condition, the paging message for indicating the paging target user equipment is directly sent to all the first target base stations connected with the core network, so that time delay caused by whole-network paging after the first paging fails is avoided, the paging success rate can be improved to a certain extent, and the paging time is shortened.
Step 103: and sending the paging message to a second target base station to which the target user equipment is connected last time when the moving speed is smaller than the first preset threshold value.
When the moving speed of the target user equipment in the last connection state is smaller than the first preset threshold, the position of the target user equipment when the core network receives the target service is closer to the position of the target user equipment in the last connection state, which indicates that the target user equipment may still be in the coverage of the second target base station connected last time. Therefore, if the core network sends the paging message for indicating the paging of the target user equipment to the second target base station connected with the target user equipment last time, the paging can be successfully performed, so that the time delay caused by the whole-network paging without the whole-network paging is avoided, the paging success rate can be improved to a certain extent, and the paging time is shortened.
As can be seen from the above description, in the embodiment of the present invention, when the target ue is in the idle state, if the core network receives the target service and needs to page the target ue, the core network may obtain the pre-recorded moving speed of the target ue when the target ue is in the connection state last time, so that when the moving speed is greater than or equal to the first preset threshold, the core network sends the paging message for instructing to page the target ue to the first target base station to which the core network is connected, and when the moving speed is less than the first preset threshold, the core network sends the paging message for instructing to page the target ue to the second target base station to which the target ue is connected last time.
When the moving speed of the target user equipment in the last connection state is greater than a first preset threshold, the position of the target user equipment when the core network receives the target service is far away from the position of the target user equipment in the last connection state, which indicates that the target user equipment is possibly out of the coverage range of a second target base station connected last time; and under the condition that the moving speed of the target user equipment in the last connection state is less than the first preset threshold, when the core network receives the target service this time, the position of the target user equipment is closer to the position of the target user equipment in the last connection state, which indicates that the target user equipment may still be in the coverage of the second target base station connected last time. Therefore, the embodiment of the invention can execute different paging strategies according to the moving speed of the target user equipment in the connection state last time, thereby improving the paging success rate to a certain extent and further shortening the paging time to a certain extent.
Optionally, the obtaining the pre-recorded moving speed of the target ue when the target ue is in the connected state last time includes:
judging whether the target service is a low-delay service or not, wherein the delay of the low-delay service is less than or equal to a second preset threshold;
and when the target service is a low-delay service, acquiring the pre-recorded moving speed of the target user equipment in the last connection state.
The length of the paging time has no obvious effect on some services, and has a great effect on low-delay services (such as calls). Therefore, after receiving the target service, the core network may determine whether the target service belongs to the low-latency service, so that when the target service belongs to the low-latency service, the core network may obtain the pre-recorded moving speed of the target user equipment when the target user equipment is in the connection state last time, and then execute different paging strategies according to the moving speed.
Optionally, the determining whether the target service is a low latency service includes:
acquiring a service quality parameter of the target service;
determining a paging priority corresponding to the service quality parameter of the target service according to a pre-established corresponding relation between the service quality parameter and the paging priority, and taking the paging priority as the target priority;
determining the target service as a low-delay service under the condition that the target priority is greater than or equal to a first preset priority;
and under the condition that the target priority is smaller than the first preset priority, determining that the target service is not a low-delay service.
As can be seen from the above, the time delay of the service with the paging priority greater than or equal to the first preset priority is less than or equal to the second preset threshold; the time delay of the service with the paging priority smaller than the first preset priority is larger than a second preset threshold.
The User Plane Function (UPF) network element of the core network may distinguish a service type of a target service according to a pre-configured packet filter, so that the service type is sent to an Access and Mobility Management Function (AMF) network element, so that the AMF network element determines a quality of service (QoS) parameter configured by a service system according to the service type, and further may determine a priority of the target service according to the QoS parameter of the target service and a correspondence between the pre-established QoS parameter and a paging priority.
In addition, after receiving the downlink data, the UPF sends a data notification message to the SMF; after receiving the data notification message, the SMF notifies a confirmation message to the UPF data and sends N1N2 message transmission to the AMF; and after receiving the N1N2 message transmission, the AMF sends an N1N2 message transmission response to the SMF. The service type of the target service may be transmitted from the UPF to the AMF through this process, that is, the service type of the target service is carried in the foregoing data notification and N1N2 message transmission. Wherein, N1N2 is the interface name.
In addition, the correspondence between the pre-established QoS and the paging priority can be shown in table 1 below. That is, the values of the 5G Quality identifiers (5G Quality identification, 5qi) may be set to the corresponding priorities. For example, the paging priorities shown in table 1 may be set such that the first paging priority and the second paging priority are set to a high priority, the third paging priority is set to a medium priority, and the fourth paging priority and the fifth paging priority are set to a low priority, so that when the target priority of the target service is a high priority, it may be determined that the target service is a low latency service.
TABLE 1 5QI and paging priority settings in QoS
Optionally, after determining the paging priority corresponding to the qos parameter of the target service according to the pre-established correspondence between the qos parameter and the paging priority, and taking the paging priority as the target priority, the method further includes:
and sending the paging message to a second target base station connected with the target user equipment last time under the condition that the target priority is smaller than a first preset priority and larger than a second preset priority.
For example, the paging priorities shown in table 1 may be set such that the first paging priority and the second paging priority are set to a high priority, the third paging priority is set to a medium priority, and the fourth paging priority and the fifth paging priority are set to a low priority, so that when the target priority of the target service is the medium priority, a paging message for instructing paging of the target user equipment may be sent to the second target base station to which the target user equipment is connected last time.
The target priority is smaller than the first preset priority and larger than the second preset priority, which indicates that the target service does not belong to the low-latency service, the core network receives the target service when the target user equipment is in an idle state, and when the target user equipment needs to be paged, the core network can send a paging message for indicating the target user equipment to a second target set connected to the target user equipment last time.
Optionally, after determining the paging priority corresponding to the qos parameter of the target service according to the pre-established correspondence between the qos parameter and the paging priority, and using the paging priority as the target priority, the method further includes:
when the target priority is less than or equal to a second preset priority, acquiring a paging load of a second target base station to which the target user equipment is connected last time, wherein the paging load represents the number of users paged by the second target base station at a target time, and the target time is the time when the core network receives the target service;
sending the paging message to a second target base station connected to the target user equipment last time under the condition that the paging load of the second target base station is smaller than a third preset threshold value;
and when the paging load of the second target base station is greater than or equal to the third preset threshold, delaying paging of the target user equipment until the paging load of the second target base station is less than the third preset threshold, and then sending the paging message to the second target base station connected with the target user equipment last time.
And if the target priority is less than or equal to the second preset priority, the target service does not belong to the low-delay service, and the influence of the length of the paging time on the target service is small, and in this case, the target user equipment can be paged according to the paging load of the second target base station. That is, when the paging load is greater than or equal to the third preset threshold, the paging target ue is delayed until the paging load is less than the third preset threshold, and the core network does not send the paging message for indicating the paging target ue to the second target base station.
Therefore, in the embodiment of the present invention, the service insensitive to the length of the paging time may delay the paging to preferentially ensure the execution of other services.
Optionally, in a case that the target ue is not paged successfully after the paging message is sent to the second target base station to which the target ue is connected last time, the method further includes:
acquiring a first geographical location of the target user equipment, which is recorded in the core network, wherein the first geographical location is a geographical location where the target user equipment is located when a second target base station to which the target user equipment is connected last receives a context release message of the target user equipment, which is sent by the core network;
acquiring a base station of the first geographical position within a preset range, and using the base station as a third target base station;
transmitting the paging message to the third target base station.
Therefore, in the embodiment of the present invention, the second target base station to which the target ue is connected last time may report the first geographical location of the target ue located once to the core network when the target ue is released, and then the core network records the first geographical location, so that when the core network sends the paging message to the second target base station but does not successfully page the target ue, the base station within the preset range where the first geographical location is located may be obtained, and the paging message used for indicating to page the target ue is sent to the base stations.
The first geographical location is the latest geographical location before the target user equipment enters the idle state this time, so that the geographical location where the target user equipment is located when the core network receives the target service may be greatly within the preset range where the first geographical location is located, that is, the geographical location where the target user equipment is located when the core network receives the target service may be greatly within the coverage range of the base station within the preset range where the first geographical location is located, and therefore, when the core network sends the paging message to the second target base station but does not successfully page the target user equipment, the core network may send the paging message for indicating to page the target user equipment to the base station within the preset range where the first geographical location is located, thereby increasing the paging success rate to a certain extent.
Optionally, after sending the paging message to the third target base station, in a case that the target user equipment is not paged successfully, the method further includes:
and sending a paging message to a first target base station connected with the core network.
Therefore, in the embodiment of the present invention, after the core network sends the paging message to the third target base station, and the target user equipment is not paged, the paging message may be sent to all the first target base stations connected to the core network, so that the target user equipment may be paged.
Optionally, the preset range is a range covered by a circle with the first geographical position as a circle center and the preset value as a radius.
Optionally, the obtaining process of the moving speed when the target user equipment is in the connected state includes:
when the target user equipment is in a connection state, sending a position request message to the target user equipment;
receiving a second geographical position of the target user equipment sent by the target user equipment every other preset time;
and calculating the moving speed of the target user equipment according to the second geographical position and the corresponding sending time.
Therefore, in the embodiment of the present invention, when the target ue is in the connected state, the core network may send the location request message to the target ue, so that the target ue reports the geographical location of the target ue to the core network once every preset time, and thus the core network may calculate the moving speed of the target ue according to the geographical location and the reporting time reported by the target ue.
As can be seen from the above, when the target ue is in the connected state, the second geographic location may be reported to the core network at preset time intervals. The second target base station connected before the target user equipment enters the idle state can also report the last first geographical position of the target user equipment before the target user equipment enters the idle state to the core network.
The reporting of the second geographical location and the first geographical location may be implemented in the processes of steps 201 to 208 shown in fig. 2. The process of steps 201-208 may be as follows:
step 201: the target user equipment enters a connection state and activates an Access (AS) layer;
step 202: the target user equipment sends a Radio Resource Control (RRC) message to a second target base station, wherein the RRC message carries the geographical position of the target user equipment;
step 203: the core network requests the target user equipment to report the geographical position;
step 204: the target user equipment reports the geographical position (namely the second geographical position) of the target user equipment to the core network at intervals of preset time;
step 205: the core network sends a context release message of the target user equipment to a second target base station;
step 206; the second target base station sends a context release completion message of the target user equipment to the core network, wherein the user equipment context release completion message carries the geographical position (namely the first geographical position) of the target user equipment which is positioned when the second target base station receives the user context release message;
step 207: the second target base station interacts with the target user equipment to disconnect the target user equipment from the second target base station, so that the target user equipment enters an idle state;
step 208: and (4) service triggering paging, namely, after the core network receives the target service, paging the target user equipment.
That is, when the target ue is in a connected state, the core network may request the target ue to report the geographical location information, so that the core network calculates the moving speed according to the geographical location and the reporting time of the target ue. Before the target user equipment enters the idle state, the base station connected with the target user equipment can report the final geographic position of the target user equipment to the core network, and the core network records the final geographic position and time of the target user equipment.
In summary, the specific implementation of the paging method according to the embodiment of the present invention can be as follows:
as shown in fig. 3, when the target user equipment is in an idle state and the UPF of the core network receives downlink data of the target service, the UPF distinguishes service types, carries the service types in a data notification message, and sends the data notification message to the SMF, so that the SMF replies a data notification confirmation message to the UPF, carries the service types in N1N2 message transmission, and sends the N1N2 message transmission response to the AMF. After obtaining the service types, the AMF may implement different paging strategies for different types of services, that is, determine to which base stations to send paging messages for different types of services. After receiving the paging message, the base station initiates paging to the target user equipment, so that the target user equipment, the base station and the core network are interacted to generate a service request; and then the core network sends the downlink data to the base station, and the base station forwards the downlink data to the target user equipment.
After obtaining the service type, the AMF may obtain a QoS parameter corresponding to the service type. As shown in fig. 4, after acquiring the QoS parameter, the AMF may determine the paging priority of the target service (i.e., determine the paging priority of the target service according to the acquired QoS parameter and the pre-established correspondence between QoS and paging priority). When the paging priority of the target service is high priority, executing a high priority service paging strategy; when the paging priority of the target service is a medium priority, executing a medium priority service paging strategy; and when the paging priority of the target service is low priority, executing a low priority service paging strategy.
Specifically, a high priority paging strategy, as shown in fig. 5. For a high-priority target service, firstly, a core network judges whether the moving speed of a target user equipment in a connection state last time is greater than a first preset threshold (for example, 60 km/h), and if the moving speed is greater than or equal to the first preset threshold, the core network sends paging messages to all first target base stations connected with the core network; if the moving speed is smaller than a first preset threshold value, the core network sends a paging message to a second target base station connected with the target user equipment last time;
secondly, judging whether a second target base station successfully pages the target user equipment, if so, finishing paging, and if not, sending a paging message to a third target base station within a preset range of a first geographical position by a core network, wherein the first geographical position is the geographical position of the target user equipment positioned when the second target base station which is connected last by the target user equipment receives a context release message of the target user equipment sent by the core network;
and thirdly, judging whether the third target base station successfully pages the target user equipment, if so, finishing paging, and if not, sending a paging message to all the first target base stations connected with the core network by the core network.
In particular, a medium priority paging strategy is shown in fig. 6. For the target service with medium priority, firstly, the core network sends a paging message to a second target base station connected with the target user equipment last time;
secondly, the core network judges whether the second target base station successfully pages the target user equipment, if so, the paging is finished, if not, the core network sends a paging message to a third target base station within a preset range of the first geographic position, wherein the first geographic position is the geographic position of the target user equipment which is positioned when the second target base station which is connected with the target user equipment last time receives a context release message of the target user equipment sent by the core network;
and thirdly, the core network judges whether the third target base station successfully pages the target user equipment, if so, the paging is finished, and if not, the core network sends paging messages to all the first target base stations connected with the core network.
In particular, a low priority paging strategy, as shown in fig. 7. For the low-priority target service, firstly, the core network determines whether the paging load (i.e. the number of the user equipments currently being paged) of the second target base station to which the target user equipment is connected last time is greater than a third preset threshold, if the paging load is greater than or equal to the third preset threshold, the paging of the target user equipment is delayed until the paging load of the second target base station is less than the third preset threshold, the core network sends the paging message to the second target base station, and if the paging load is less than the third preset threshold, the core network directly sends the paging message to the second target base station.
Optionally, in the low-priority paging policy, after the core network sends the paging message to the second target base station, it may further determine whether the second target base station successfully pages the target user equipment, if so, the paging is completed, and if not, the core network may further send the paging message to a third target base station within a preset range where the first geographic location is located, where the first geographic location is the geographic location where the target user equipment is located when the second target base station to which the target user equipment is last connected receives a context release message of the target user equipment sent by the core network; then, the core network may further determine whether the third target base station successfully pages the target user equipment, if so, complete the paging, and if not, the core network sends a paging message to all the first target base stations connected to the core network.
As can be seen from the above, in the embodiment of the present invention, when the core network is a satellite core network and the target user equipment is a satellite terminal, the satellite core network may distinguish service types, execute different paging strategies for services with different priorities, and track the position of the satellite terminal and calculate the moving speed when the satellite terminal is in a connected state, so that when the satellite terminal is in an idle state, the validity of the position of the satellite terminal can be determined according to the moving speed, and it is determined whether to use Tracking Area (TA) paging or full-network paging for the first time, so that the paging success rate can be increased to a certain extent, and the paging time can be shortened to a certain extent.
In summary, the paging process is an important function of the core network and the base station. When a service such as a call to the user equipment arrives, the length of the paging procedure is related to the length of the on-time interval. The core network needs to determine which relevant base stations to send the paging message to, and determine whether the user equipment is within the coverage of these base stations, so that the base stations page the user equipment using an air interface process. Moreover, if the paging message is sent to more base stations, the base stations will receive more paging messages to the user equipment, and the overhead occupied by paging is larger.
In addition, the process of paging the user equipment by the base station is very large in signaling overhead. Then if a paging message is sent to a relatively small range of base stations in order to save overhead, it is likely that the UE has moved out of the coverage of these small range base stations and the paging fails.
Furthermore, in the satellite scenario, transmission resources are very much under tension. How to order the traffic and use paging combinations of different strategies with limited resources. It is very important for the orderly use of various services.
In the embodiment of the invention, the core network can determine the paging priority of the service according to the QoS parameters and select a proper base station for paging by combining the moving speed, so that the paging success rate can be improved to a certain extent, the paging time can be shortened to a certain extent, the signaling overhead is saved, and the resources are saved.
The paging method provided by the embodiment of the present invention is described above, and the paging apparatus provided by the embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 8, an embodiment of the present invention further provides a paging apparatus, which is applied to a core network, and the apparatus includes:
a moving speed obtaining module 801, configured to obtain, when a target user equipment is in an idle state and a core network receives a target service, a pre-recorded moving speed of the target user equipment when the target user equipment is in a connected state last time;
a first paging module 802, configured to send a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, where the paging message is used to instruct to page the target user equipment;
a second paging module 803, configured to send the paging message to a second target base station to which the target ue is connected last time when the moving speed is smaller than the first preset threshold.
Optionally, the moving speed obtaining module 801 includes:
the judging submodule is used for judging whether the target service is a low-delay service or not, wherein the delay of the low-delay service is less than or equal to a second preset threshold;
and the obtaining submodule is used for obtaining the pre-recorded moving speed of the target user equipment in the last connection state when the target service is the low-delay service.
Optionally, the determining module is specifically configured to:
acquiring a service quality parameter of the target service;
determining a paging priority corresponding to the service quality parameter of the target service according to a pre-established corresponding relation between the service quality parameter and the paging priority, and taking the paging priority as the target priority;
determining the target service as a low-delay service under the condition that the target priority is greater than or equal to a first preset priority;
and under the condition that the target priority is smaller than the first preset priority, determining that the target service is not a low-delay service.
Optionally, the apparatus further comprises:
and the third paging module is used for sending the paging message to a second target base station connected with the target user equipment last time under the condition that the target priority is smaller than the first preset priority and larger than the second preset priority.
Optionally, the apparatus further comprises:
a load obtaining module, configured to obtain, when the target priority is less than or equal to a second preset priority, a paging load of a second target base station to which the target user equipment is connected last time, where the paging load indicates a number of users paged by the second target base station at a target time, and the target time is a time when the core network receives the target service;
a fourth paging module, configured to send the paging message to a second target base station to which the target user equipment is connected last time when a paging load of the second target base station is smaller than a third preset threshold;
a fifth paging module, configured to delay paging the target user equipment when the paging load of the second target base station is greater than or equal to the third preset threshold, and send the paging message to a second target base station to which the target user equipment is connected last time after the paging load of the second target base station is smaller than the third preset threshold.
Optionally, the apparatus further comprises:
a first geographic location obtaining module, configured to, after sending the paging message to the third target base station, obtain, when the target user equipment is not successfully paged after the paging message is sent to the third target base station, a first geographic location of the target user equipment recorded in the core network when the target user equipment is not successfully paged after the paging message is sent to the third target base station, where the first geographic location is a geographic location where the target user equipment is located when a second target base station to which the target user equipment is last connected receives a context release message of the target user equipment sent by the core network;
the base station acquisition module is used for acquiring a base station of the first geographical position within a preset range and serving as a third target base station;
a sixth paging module, configured to send the paging message to the third target base station.
Optionally, the apparatus further comprises:
a seventh paging module, configured to send a paging message to the first target base station connected to the core network when the target user equipment is not paged successfully after the paging message is sent to the third target base station.
Optionally, the apparatus further comprises: the mobile speed acquisition module is used for acquiring the mobile speed of the target user equipment in a connection state;
the moving speed acquisition module comprises:
the request submodule is used for sending a position request message to the target user equipment when the target user equipment is in a connection state;
the position receiving submodule is used for receiving the second geographical position of the target user equipment sent by the target user equipment at preset time intervals;
and the speed calculation submodule is used for calculating the moving speed of the target user equipment according to the second geographic position and the corresponding sending time.
The paging device provided in the embodiment of the present invention can implement each process implemented by the base station side in the method embodiments of fig. 1 to fig. 7, and is not described here again to avoid repetition.
In the embodiment of the invention, when the target user equipment is in an idle state, if the core network receives a target service and needs to page the target user equipment, the core network can acquire the pre-recorded moving speed of the target user equipment when the target user equipment is in a connection state last time, so that when the moving speed is greater than or equal to a first preset threshold value, the core network sends a paging message for indicating to page the target user equipment to a first target base station connected with the core network, and when the moving speed is less than the first preset threshold value, the core network sends a paging message for indicating to page the target user equipment to a second target base station connected with the target user equipment last time.
When the moving speed of the target user equipment in the last connection state is greater than a first preset threshold, the position of the target user equipment when the core network receives the target service is far away from the position of the target user equipment in the last connection state, which indicates that the target user equipment is possibly out of the coverage range of a second target base station connected last time; and under the condition that the moving speed of the target user equipment in the last connection state is less than the first preset threshold, when the core network receives the target service this time, the position of the target user equipment is closer to the position of the target user equipment in the last connection state, which indicates that the target user equipment may still be in the coverage of the second target base station connected last time. Therefore, the embodiment of the invention can execute different paging strategies according to the moving speed of the target user equipment in the connection state last time, thereby improving the paging success rate to a certain extent and further shortening the paging time to a certain extent.
On the other hand, the embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the steps in the paging method are implemented.
For example, fig. 9 shows a schematic physical structure diagram of an electronic device.
As shown in fig. 9, the electronic device may include: a processor (processor) 910, a communication Interface (Communications Interface) 920, a memory (memory) 930, and a communication bus 940, wherein the processor 910, the communication Interface 920, and the memory 930 communicate with each other via the communication bus 940. Processor 910 may invoke logic instructions in memory 930 to perform the following method:
when a target user equipment is in an idle state and a core network receives a target service, acquiring a pre-recorded moving speed of the target user equipment in a last connection state;
sending a paging message to a first target base station connected with the core network under the condition that the moving speed is greater than or equal to a first preset threshold value, wherein the paging message is used for indicating to page the target user equipment;
and sending the paging message to a second target base station to which the target user equipment is connected last time when the moving speed is smaller than the first preset threshold value.
Furthermore, the logic instructions in the memory 930 may be implemented in 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 solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes 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 method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In still another aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to, when executed by a processor, perform the paging method provided in the foregoing embodiments, for example, including:
when a target user equipment is in an idle state and a core network receives a target service, acquiring a pre-recorded moving speed of the target user equipment in a last connection state;
sending a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, wherein the paging message is used for indicating to page the target user equipment;
and sending the paging message to a second target base station connected with the target user equipment last time when the moving speed is smaller than the first preset threshold value.
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. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various 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, and 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. A paging method, applied to a core network, the method comprising:
when a target user equipment is in an idle state and a core network receives a target service, acquiring a pre-recorded moving speed of the target user equipment in a last connection state;
predicting the position of the target user equipment at the moment according to the moving speed of the target user equipment in the connection state last time;
sending a paging message to a first target base station connected with the core network under the condition that the moving speed is greater than or equal to a first preset threshold value, wherein the paging message is used for indicating to page the target user equipment;
sending the paging message to a second target base station to which the target user equipment is connected last time when the moving speed is smaller than the first preset threshold;
sending the paging message to a second target base station to which the target user equipment is connected last time, and acquiring a first geographical position of the target user equipment recorded in the core network under the condition that the target user equipment is not paged successfully, wherein the first geographical position is a geographical position where the target user equipment is located when the second target base station to which the target user equipment is connected last time receives a context release message of the target user equipment sent by the core network;
acquiring a base station of the first geographical position within a preset range, and using the base station as a third target base station;
transmitting the paging message to the third target base station.
2. The paging method according to claim 1, wherein said obtaining a pre-recorded moving speed of the target ue when the target ue was last in a connected state comprises:
judging whether the target service is a low-delay service, wherein the delay of the low-delay service is less than or equal to a second preset threshold;
and when the target service is a low-delay service, acquiring the pre-recorded moving speed of the target user equipment in the last connection state.
3. The paging method according to claim 2, wherein said determining whether the target service is a low latency service comprises:
acquiring a service quality parameter of the target service;
determining a paging priority corresponding to the service quality parameter of the target service according to a pre-established corresponding relation between the service quality parameter and the paging priority, and taking the paging priority as the target priority;
determining the target service as a low-delay service under the condition that the target priority is greater than or equal to a first preset priority;
and under the condition that the target priority is smaller than the first preset priority, determining that the target service is not a low-delay service.
4. The paging method according to claim 3, wherein said determining a paging priority corresponding to the service quality parameter of the target service according to a pre-established correspondence between the service quality parameter and the paging priority, and after the determining the paging priority as the target priority, the method further comprises:
and sending the paging message to a second target base station connected with the target user equipment last time under the condition that the target priority is smaller than a first preset priority and larger than a second preset priority.
5. The paging method according to claim 3, wherein after determining the paging priority corresponding to the qos parameter of the target service according to the pre-established correspondence between the qos parameter and the paging priority, and taking the determined paging priority as the target priority, the method further comprises:
when the target priority is less than or equal to a second preset priority, acquiring a paging load of a second target base station to which the target user equipment is connected last time, wherein the paging load represents the number of users paged by the second target base station at a target time, and the target time is the time when the core network receives the target service;
sending the paging message to a second target base station connected to the target user equipment last time under the condition that the paging load of the second target base station is smaller than a third preset threshold value;
and when the paging load of the second target base station is greater than or equal to the third preset threshold, delaying paging of the target user equipment until the paging load of the second target base station is less than the third preset threshold, and then sending the paging message to the second target base station connected with the target user equipment last time.
6. The paging method as claimed in claim 1, wherein in case of unsuccessfully paging the target user equipment after transmitting the paging message to the third target base station, the method further comprises:
and sending a paging message to a first target base station connected with the core network.
7. The paging method according to claim 1, wherein the acquiring procedure of the moving speed of the target ue while in the connected state comprises:
when the target user equipment is in a connection state, sending a position request message to the target user equipment;
receiving a second geographical position of the target user equipment sent by the target user equipment every other preset time;
and calculating the moving speed of the target user equipment according to the second geographical position and the corresponding sending time.
8. A paging device applied to a core network, the device comprising:
a moving speed obtaining module, configured to obtain, when a target user equipment is in an idle state and a core network receives a target service, a pre-recorded moving speed of the target user equipment when the target user equipment is in a connected state last time;
the position prediction module is used for predicting the position of the target user equipment at the moment according to the moving speed of the target user equipment in the connection state last time;
a first paging module, configured to send a paging message to a first target base station connected to the core network when the moving speed is greater than or equal to a first preset threshold, where the paging message is used to instruct to page the target user equipment;
a second paging module, configured to send the paging message to a second target base station to which the target ue is connected last time when the moving speed is smaller than the first preset threshold;
a first geographic location obtaining module, configured to obtain a first geographic location of the target user equipment, where the first geographic location is located when a second target base station to which the target user equipment is last connected receives a context release message of the target user equipment, where the context release message is sent by the core network;
the base station acquisition module is used for acquiring a base station of the first geographical position within a preset range and serving as a third target base station;
a sixth paging module, configured to send the paging message to the third target base station.
9. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the paging method according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the paging method according to one of claims 1 to 7.
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