CN114679756B - Wireless connection state management system and method for user terminal in non-activated state - Google Patents

Wireless connection state management system and method for user terminal in non-activated state Download PDF

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CN114679756B
CN114679756B CN202210580216.4A CN202210580216A CN114679756B CN 114679756 B CN114679756 B CN 114679756B CN 202210580216 A CN202210580216 A CN 202210580216A CN 114679756 B CN114679756 B CN 114679756B
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user terminal
path switching
switching request
access
network
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CN114679756A (en
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张一鸣
程运
陈林
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Wuhan Shiju Information Technology Co ltd
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Wuhan Shiju Information Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
    • 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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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a wireless connection state management system and a wireless connection state management method for a user terminal in an inactive state. Wherein the system includes: the first network equipment is deployed at an access network side; a path switching request counting function, wherein the path switching request counting function is deployed at a core network side; a wireless access network basic notification area updating timing function, wherein the wireless access network basic notification area updating timing function is deployed at a core network side; an access and mobility management function, AMF, deployed on the core network side. According to the system and the method, the user terminal in the inactive state is timed and counted according to the state of the path switching request, the time of the user terminal in the inactive state is judged, and the user terminal in the inactive state for a long time is converted into the idle state, so that the signaling overhead and the energy consumption of the user terminal are saved.

Description

Wireless connection state management system and method for user terminal in non-activated state
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a system and a method for managing a wireless connection status of a user equipment in an inactive state.
Background
In the 5G NR, RRC (Radio Resource Control) is a message configuration center and a Control center of an access layer of the entire Radio communication protocol stack. The RRC layer supports sending a dedicated NAS signaling generated by the UE or a network element of the core network to the opposite end over an air interface, and also sends a public NAS layer message to the User Equipment (UE) in a system broadcast manner. Besides, the main functions of RRC include listening paging, RRC connection control, security function, establishment, maintenance and release of SRB and DRB, etc.
In the 3GPP standard, the radio connection state of the RRC layer is divided into three states, RRC _ IDLE, RRC _ CONNECTED, and RRC _ INACTIVE, which can be switched with each other. When the UE is not connected with the network after being started, the UE is in an RRC _ IDLE state; after the UE establishes a connection with the network, the current state of the UE may be an RRC _ CONNECTED state and may also be an RRC _ INACTIVE state, where the RRC _ INACTIVE state is a state newly introduced by the 5G NR system compared to the LTE system. The UE disconnects with a wireless side in an RRC _ INACTIVE state, but can keep signaling connection with a core network, and when the UE has data to transmit or monitors a paging message of a network side, the UE recovers connection with the network, so that the UE is ensured to save electricity, and meanwhile, the quick state conversion with low time delay and low signaling overhead is realized.
In the 5G network, due to intensive deployment of small base stations, the coverage of a smaller-range cell causes frequent location update of the UE when the UE moves between cells and increases the paging difficulty of the user, which brings a large amount of location update and paging signaling overhead to the network. When the UE is in the RRC _ INACTIVE state, the access network device allocates a radio access network Notification Area (RNA) to the UE, and the UE may be in the RNA Area for a long time or may move out of the RNA Area. When the UE is in an RRC _ INACTIVE state, the Update of a radio access network notification area (RNA Update, RNAU) needs to be carried out, and the Update is triggered when new RNA information is detected in the moving process; one is that the T380 timer times out triggering the update procedure.
However, for a UE in an RRC _ INACTIVE state for a long time, multiple RNAU procedures may occupy a large amount of air interface signaling overhead, and multiple interactions may also cause an increase in terminal energy consumption, especially in a 5G network, because small base stations are densely deployed, the UE may frequently need to perform the RNAU procedures during a moving process, which causes long-term occupation and consumption of resources.
Disclosure of Invention
In view of the above, it is desirable to provide a method for restricting a UE in an inactive state according to the specific situation of the UE
And the RNAU is still performed for multiple times in the state, so that the occupation of air interface signaling and the energy consumption of the UE are reduced.
In order to achieve the above object, embodiments of the present application provide a system and a method for managing a wireless connection status of a user equipment in an inactive state.
The application provides a wireless connection state management system of a user terminal non-activation state, comprising:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a radio access network basic notification area updating process of a user terminal in an inactive state.
And the path switching request counting function is deployed at the core network side and used for updating the path switching request times when the access and mobile management function AMF receives a path switching request from the first network equipment.
And the access and mobility management function AMF is deployed at a core network side and is used for receiving a path switching request sent by the first network equipment.
The access and mobility management function AMF is further configured to: and when the times of the path switching requests exceed a preset first threshold value, sending an instruction for indicating the user terminal to enter an idle state to the first network equipment.
The first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
Further, in the system for managing a wireless connection status of a user equipment in an inactive state provided in the embodiment of the present application, the path switching request counting function is further configured to: when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
The present application also provides another wireless connection status management system in an inactive status of a user equipment, including:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
a path switching request counting function, which is deployed at a core network side and used for updating the path switching request count when the access and mobility management function (AMF) receives a path switching request from the first network device;
a radio access network basic notification area update timing function deployed on a core network side, configured to start the radio access network basic notification area update timing function when an access and mobility management function AMF receives a path switching request from a first network device;
an access and mobility management function AMF, deployed on a core network side, for receiving a path switching request sent by a first network device,
the access and mobility management function AMF is further configured to: when the timing of the wireless access network basic notification area updating timing function exceeds a preset first time length and when the frequency of the path switching request reaches a preset second threshold value, sending an instruction for indicating the user terminal to enter an idle state to first network equipment;
the first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
Further, in another radio connection status management system in an inactive state of a ue provided in an embodiment of the present application, the path switching request counting function is further configured to: when the user terminal is detected to be converted into a connection state or an idle state, the counting of the path switching request counting function returns to zero;
the radio access network based notification area update timing function is further to: when detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
Further, in the foregoing two wireless connection status management systems in the inactive state of the ue provided in this embodiment of the present application, the method further includes: the second network equipment is used for configuring the last service of the user terminal entering the non-activated state;
the second network device is further to: before the step of sending a path switching request to an access and mobility management function (AMF) of a core network side by the first network equipment, receiving a user terminal service data forwarding address sent to the second network equipment by the first network equipment.
The method for managing the wireless connection state of the user terminal in the non-activated state comprises the following steps:
the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
when the access and mobile management function AMF receives a path switching request from the first network equipment, the path switching request counting function updates the path switching request times;
when the number of times of the path switching request exceeds a preset first threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network equipment;
the first network equipment releases the resources occupied by the user terminal according to the instruction of indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
Further, the method for managing a wireless connection status of a user equipment in an inactive state provided in an embodiment of the present application further includes:
when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
The application also provides a wireless connection state management method for the user terminal in the inactive state, which comprises the following steps:
the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
when the access and mobile management function AMF receives a path switching request from the first network equipment, the path switching request counting function updates the path switching request times;
when the access and mobile management function AMF receives a path switching request from a first network device, starting a wireless access network basic notification area updating timing function;
when the timing of the wireless access network basic notification area updating timing function exceeds a preset first time length and when the frequency of the path switching request reaches a preset second threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network equipment;
the first network equipment releases the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
Further, in another method for managing a radio connection status of a user equipment in an inactive state provided in an embodiment of the present application, the method further includes:
when the user terminal is detected to be converted into a connection state or an idle state, the counting of the path switching request counting function returns to zero;
when detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
Further, in the foregoing two methods for managing a radio connection status of a ue in an inactive state provided in this embodiment of the present application, the method further includes:
before the step that the first network equipment sends a path switching request to an access and mobile management function (AMF) of a core network side, sending a user terminal service data forwarding address to second network equipment;
the second network device is a network device which configures the last service that the user terminal enters into the inactive state.
Compared with the prior art, the system and the method for managing the wireless connection state of the user terminal in the INACTIVE state provided by the embodiment of the application time and count the UE in the RRC _ INACTIVE state according to the state of the path switching request, judge the time that the UE is in the RRC _ INACTIVE state, further convert the UE which is in the RRC _ INACTIVE state for a long time into the RRC _ IDLE state, and save signaling overhead and energy consumption of the UE.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow chart of a UE in an RRC _ INACTIVE state performing radio access network notification area Update (RNAU) in the prior art.
Fig. 2 is a schematic structural diagram of a wireless connection state management system in an inactive state of a user equipment according to the present application.
Fig. 3 is a schematic structural diagram of another system for managing a wireless connection status of a ue in an inactive state according to the present application.
Fig. 4 is a flowchart illustrating a method for managing a wireless connection status of a ue in an inactive state according to the present application.
Fig. 5 is a flowchart illustrating a radio connection status management method for a ue in an inactive state according to another embodiment of the present invention.
Fig. 6 is a schematic overall flow chart of a wireless connection state management method in an inactive state of a ue according to the present application.
Fig. 7 is a flowchart illustrating a signaling procedure for a core network to initiate active release of a UE in a method for managing a wireless connection status of a UE in an inactive status according to the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiments of the present application have been described with reference to a terminal device and a network device. Wherein:
a User terminal may also be referred to as a User Equipment (UE), a terminal device, an access terminal, a subscriber unit, a mobile station, a remote terminal, a mobile device, a terminal, a wireless communication device, a User agent, or a User Equipment, etc. The user terminal may be a STATION (ST) in the WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) STATION, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in an NR Network or a user terminal in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.
By way of example and not limitation, in the embodiments of the present application, the user terminal may also be a wearable device. For example: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.
The network device may be a device for communicating with a mobile device, and the network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, an evolved Node B (eNB, eNodeB) in LTE, a relay Station, a vehicle-mounted device, a wearable device, a network device or a Base Station (gNB) in an NR network, or a network device in a PLMN network that is evolved in the future, and the like.
In this embodiment of the present application, a network device provides a service for a cell, and a user terminal communicates with the network device through a transmission resource (e.g., a frequency domain and a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell). Here, the small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like.
The embodiments of the present application will be described in further detail with reference to the drawings attached hereto. In the drawings and embodiments of the present application, a user terminal (UE) is taken as an example, and a network device is taken as a 5G base station (gNB) as an example. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the application and are not restrictive thereof.
In the application, in the moving process of the UE, a new radio access network device (gNB) serving the UE is a first network device, the UE is switched from an RRC connected state to an RRC inactive state, and a Last radio access network device (Last serving gNB) serving the UE is a second network device. The UE and the network device providing service for the UE have downlink synchronization, receive a broadcast signal of the network device, and interact with the core network through the network device, in particular, interact with a control plane Function, an Access and Mobility Management Function (AMF) of the core network. The AMF is mainly used to provide mobility management and access management functions for users.
Fig. 1 is a schematic flow chart of a UE in an RRC _ INACTIVE state performing radio access network notification area Update (RNAU) in the prior art. As shown in fig. 1, the method mainly comprises the following steps:
s110, when the radio access network notification area Update (RNAU) is required, the UE recovers from the RRC _ INACTIVE state and sends an RRC Connection Resume Request message to the first network device (the newly serving gNB).
S120, the first network device (the newly serving gNB) sends a UE Context Request (Retrieve UE Context Request) message to the second network device (the last serving gNB).
S130, the second network device (the last serving gbb) sends a UE Context feedback (Retrieve UE Context Response) message to the first network device (the new serving gbb).
S140, the first network device (the newly serving gbb) sends the UE back to the RRC _ INACTIVE state.
S150, if the loss of Downlink (DL) user data buffered in the second network device (the last serving gNB) is to be prevented, the first network device (the newly serving gNB) provides a forwarding address to the second network device (the last serving gNB).
S160, the first network device (the newly serving gbb) sends a Path Switch Request (Path Switch Request) message to the AMF.
S170, the AMF sends a Path Switch Request acknowledgement (Path Switch Request Response) message to the first network device (the newly serving gbb).
S180, the first network device (the newly serving gNB) keeps the UE in RRC _ INACTIVE state by sending an RRC Release message with suspend indication.
S190, the first network device (newly serving gbb) triggers the release of UE resources at the second network device (last serving gbb).
For a UE in an RRC _ INACTIVE state for a long time, multiple RANU flows occupy a large amount of overhead of air interface signaling, and multiple interactions also cause a rise in terminal energy consumption, whereas in the prior art, the RANU flow of the UE in the RRC _ INACTIVE state is not limited.
Based on this, the Timer _ RNA and the Path Switch Request number counter Num _ PathSwitchReq are added on the core network side, so as to judge the duration and the number of the RANU, and when the threshold of the counter is reached or the Timer is overtime, the UE is actively released, thereby achieving the purposes of reducing the air interface signaling occupied by the RANU flow and reducing the energy consumption of the terminal.
Referring to fig. 2, the present application discloses a system for managing an inactive wireless connection status of a ue, comprising:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a radio access network basic notification area updating process of a user terminal in an inactive state.
When in the inactive state, the UE disconnects RRC connection with the gNB, but remains in CM _ CONNECTED state on the core network side, and the UE can move within the RNA region without notifying the NG-RAN. When the UE is in RRC _ INACTIVE state, the last serving gNB retains the UE context and the NG connections associated with the UE serving AMF and UPF, as if the UE were in connected state from the core network point of view.
When the UE in RRC _ INACTIVE state moves out of the RNA range, a procedure of radio access network notification area Update (RNAU) is to be initiated, and the specific procedure is described above. When the UE initiates the RNAU procedure, the first network device (the newly serving gbb) sends a Path Switch Request (Path Switch Request) message to the AMF.
And the path switching request counting function is deployed at the core network side and used for updating the path switching request times when the access and mobile management function AMF receives a path switching request from the first network equipment.
In the embodiment of the application, the number of times of receiving the PathSwitch Request is counted by adding a path switching Request counting function Num _ PathSwitch req to the core network side, and the initial count value of the path switching Request counting function Num _ PathSwitch req is 0. And the UE in the RRC _ Inactive state triggers an RNAU process, starts a path switching Request counting function Num _ PathSwitchReq and performs addition processing after the core network AMF receives the PathSwitch Request for the first time, and continues the addition processing after the AMF receives the PathSwitch Request again.
It should be noted that the path switching request counting function in the embodiment of the present application may be a single physical entity, logical entity, or functional entity, or may be a physical entity, logical entity, or functional entity aggregated on another network element, for example, an AMF.
And the access and mobility management function AMF is deployed at a core network side and is used for receiving a path switching request sent by the first network equipment.
Access and Mobility Management functions (AMF) are network elements of a 5G core network, which are mainly used for Mobility Management (MM), including Mobility restrictions, time subscriptions and notifications, intra-system Mobility updates and handovers between gnbs, as well as Registration Management (RM), Connection Management (CM), user reachability Management, Access Management, network slice Management, user data Management, etc. In the embodiment of the present application, when the UE initiates the RNAU procedure, the AMF receives a path switching request sent by the first network device.
The access and mobility management function AMF is further configured to: and when the times of the path switching requests exceed a preset first threshold value, sending an instruction for indicating the user terminal to enter an idle state to the first network equipment.
In the embodiment of the application, the number of times that the UE initiates the RNAU process is determined by the number of times that the AMF receives the path switching request, and when the UE initiates the RNAU process multiple times and sends the path switching request to the AMF through the gNB, on one hand, the UE is continuously in the RRC _ Inactive state, on the other hand, the UE occupies a large amount of air interface signaling overhead, and meanwhile, multiple interactions also cause the terminal energy consumption to increase. Specifically, a first threshold value, that is, the number of times of the path switching request is preset as a criterion, and when the number of times of the path switching request exceeds the first threshold value, the user terminal is instructed to enter an idle state. The specific setting of the first threshold may be determined according to actual situations during deployment, for example, if the RNA range is small and the network device is deployed more densely, the first threshold may be set higher, and otherwise, the first threshold may be set lower. Of course, the specific setting is not only based on the above listed factors, but also can be set by comprehensively considering various factors according to the network environment and the user requirements.
The first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
In the embodiment of the application, the first network device receives an instruction which is sent by the AMF and indicates that the user terminal enters the idle state, releases resources occupied by the user terminal, and notifies the user terminal to enter the idle state.
Further, in the system for managing a wireless connection status of a user equipment in an inactive state provided in the embodiment of the present application, the function of counting a path switching request is further configured to: when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the count of the path switch request count function needs to be zeroed.
Referring to fig. 3, the present application further discloses another system for managing an inactive wireless connection status of a ue, comprising:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a radio access network basic notification area updating process of a user terminal in an inactive state.
When in the inactive state, the UE disconnects RRC connection with the gNB, but remains in CM _ CONNECTED state on the core network side, and the UE can move within the RNA region without notifying the NG-RAN. When the UE is in RRC _ INACTIVE state, the last serving gNB retains the UE's context and the NG connections associated with the UE with the serving AMF and UPF, as if the UE were in connected state from the core network perspective.
When the UE in RRC _ INACTIVE state moves out of the RNA range, a procedure of radio access network notification area Update (RNAU) is to be initiated, and the specific procedure is described above. When the UE initiates the RNAU procedure, the first network device (the newly serving gbb) sends a Path Switch Request (Path Switch Request) message to the AMF.
And the path switching request counting function is deployed at the core network side and used for updating the path switching request times when the access and mobile management function AMF receives a path switching request from the first network equipment.
It should be noted that the path switching request counting function in the embodiment of the present application may be a single physical entity, logical entity, or functional entity, or may be a physical entity, logical entity, or functional entity aggregated on another network element, for example, an AMF.
In the embodiment of the application, the number of times of receiving the PathSwitch Request is counted by adding a path switching Request counting function Num _ PathSwitch req to the core network side, and the initial count value of the path switching Request counting function Num _ PathSwitch req is 0. After triggering the RNAU flow, when the core network AMF receives the PathSwitchRequest for the first time, starting a Path switching Request counting function Num _ PathSwitchReq and performing addition processing, and when the AMF receives the PathSwitchRequest again, continuing the addition processing by the Num _ PathSwitchReq.
And the wireless access network basic notification area updating timing function is deployed at the core network side and is used for starting the wireless access network basic notification area updating timing function when the access and mobility management function AMF receives a path switching request from the first network equipment.
It should be noted that the radio access network infrastructure notification area update timing function in the embodiment of the present application may be a single physical entity, logical entity, or functional entity, or may be a physical entity, logical entity, or functional entity aggregated on another network element, for example, an AMF.
According to the embodiment of the application, the updating duration of the basic notification area of the radio access network is timed by adding the Timer _ RNA to the core network side. And the UE in the RRC _ Inactive state triggers an RNAU process, and starts a Timer _ RNA for timing after the core network AMF receives the PathSwitch Request for the first time.
And the access and mobility management function AMF is deployed at a core network side and is used for receiving a path switching request sent by the first network equipment.
Access and Mobility Management functions (AMF) are network elements of a 5G core network, which are mainly used for Mobility Management (MM), including Mobility restrictions, time subscriptions and notifications, intra-system Mobility updates and handovers between gnbs, as well as Registration Management (RM), Connection Management (CM), user reachability Management, Access Management, network slice Management, user data Management, etc. In the embodiment of the present application, when the UE initiates the RNAU procedure, the AMF receives a path switching request sent by the first network device.
The access and mobility management function AMF is further configured to: and when the timing of the wireless access network basic notification area updating timing function exceeds a preset first time length and the frequency of the path switching request reaches a preset second threshold value, sending an instruction for indicating the user terminal to enter an idle state to the first network equipment.
In the embodiment of the application, the time length of the UE initiating the RNAU is judged according to the time length of the path switching request received by the AMF for the first time, the time number of the UE initiating the RNAU process is judged according to the time number of the path switching request received by the AMF, when the UE initiates the RNAU process for the first time and sends the path switching request to the AMF through the gNB, the UE initiates the RNAU process for multiple times and sends the path switching request to the AMF through the gNB, on one hand, the UE is continuously in the RRC _ Inactive state for a long time, on the other hand, the UE occupies a large amount of air interface signaling overhead, and on the other hand, the terminal energy consumption can be increased due to long-term and multiple interaction. Specifically, the user terminal is instructed to enter the idle state by using a preset first time length, namely, a time length of a path switching request received for the first time by the AMF, and a preset second threshold value, namely, a number of times of the path switching request as a judgment reference, at a certain time after the path switching request is received for the first time, and when the number of times of the path switching request exceeds the first threshold value. The specific setting of the first duration and the second threshold value can be set according to actual conditions, network environment and user requirements in combination, and various factors are comprehensively considered during deployment. The first duration and the second threshold are combined to be used as a basis for judging whether the user terminal is indicated to enter the idle state or not, so that the use state of the user terminal can be judged better, and the wireless connection state of the user terminal can be regulated, controlled and managed more accurately.
The first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
In the embodiment of the application, the first network device receives an instruction which is sent by the AMF and indicates that the user terminal enters the idle state, releases resources occupied by the user terminal, and notifies the user terminal to enter the idle state.
Further, in the system for managing a wireless connection status of a user equipment in an inactive state provided in the embodiment of the present application, the path switching request counting function is further configured to: when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the count of the path switch request count function needs to be zeroed.
The radio access network based notification area update timing function is further to: when detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the radio access network basic notification area update timing function duration needs to be reset to zero.
Further, in the foregoing wireless connection status management system in an inactive state of a ue, the method further includes: the second network equipment is used for configuring the last service of the user terminal entering the non-activated state;
the second network device is further to: before the step of sending a path switching request to an access and mobility management function (AMF) of a core network side by the first network equipment, receiving a user terminal service data forwarding address sent to the second network equipment by the first network equipment.
In the inactive state of the user terminal, the UE disconnects the RRC connection with the network device, and the gNB configuring the UE to enter the last service reserves the context of the UE and the NG connections associated with the UE and serving AMF and UPF. Here, the gNB where the UE entered the last service is configured as the second network device. In order to prevent loss of Downlink (DL) user data buffered in the second network device (the last serving gNB), the first network device (the newly serving gNB) sends a user terminal service data forwarding address to the second network device (the last serving gNB), and the second network device receives the user terminal service data forwarding address sent by the first network device to the second network device.
Referring to fig. 4, the present application discloses a method for managing a wireless connection status of a ue in an inactive state, comprising the following steps:
s401, the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of the user terminal in an inactive state.
When in the inactive state, the UE disconnects RRC connection with the gNB, but remains in CM _ CONNECTED state on the core network side, and the UE can move within the RNA region without notifying the NG-RAN. When the UE is in RRC _ INACTIVE state, the last serving gNB retains the UE's context and the NG connections associated with the UE with the serving AMF and UPF, as if the UE were in connected state from the core network perspective.
When the UE in RRC _ INACTIVE state moves out of the RNA range, a procedure of radio access network notification area Update (RNAU) is to be initiated, and the specific procedure is described above. When the UE initiates the RNAU procedure, the first network device (the newly serving gbb) sends a Path Switch Request (Path Switch Request) message to the AMF.
S402, when the access and mobile management function AMF receives a path switching request from the first network equipment, the path switching request counting function updates the path switching request times.
In the embodiment of the application, the number of times of receiving the PathSwitch Request is counted by adding a path switching Request counting function Num _ PathSwitch req to the core network side, and the initial count value of the path switching Request counting function Num _ PathSwitch req is 0. And the UE in the RRC _ Inactive state triggers an RNAU process, starts a path switching Request counting function Num _ PathSwitchReq and performs addition processing after the core network AMF receives the PathSwitch Request for the first time, and continues the addition processing after the AMF receives the PathSwitch Request again.
S403, when the number of times of the path switching request exceeds a preset first threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network device.
In the embodiment of the application, the number of times that the UE initiates the RNAU process is determined by the number of times that the AMF receives the path switching request, and when the UE initiates the RNAU process multiple times and sends the path switching request to the AMF through the gNB, on one hand, the UE is continuously in the RRC _ Inactive state, on the other hand, the UE occupies a large amount of air interface signaling overhead, and meanwhile, multiple interactions also cause the terminal energy consumption to increase. Specifically, a first threshold value, that is, the number of times of the path switching request is preset as a criterion, and when the number of times of the path switching request exceeds the first threshold value, the user terminal is instructed to enter an idle state. The specific setting of the first threshold may be determined according to actual situations during deployment, for example, if the RNA range is small and the network device is deployed more densely, the first threshold may be set higher, and otherwise, the first threshold may be set lower. Of course, the specific setting is not only based on the above listed factors, but also can be set by comprehensively considering various factors according to the network environment and the user requirements.
S404, the first network device releases the resource occupied by the user terminal according to the instruction indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
In the embodiment of the application, the first network device receives an instruction which is sent by the AMF and indicates that the user terminal enters the idle state, releases resources occupied by the user terminal, and notifies the user terminal to enter the idle state.
Further, in a method for managing a wireless connection status of a user equipment in an inactive state provided in an embodiment of the present application, the method further includes:
when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the count of the path switch request count function needs to be zeroed.
Referring to fig. 5, the present application further discloses another method for managing an inactive radio connection status of a ue, which includes the following steps:
s501, the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of the user terminal in an inactive state.
When in the inactive state, the UE disconnects RRC connection with the gNB, but remains in CM _ CONNECTED state on the core network side, and the UE can move within the RNA region without notifying the NG-RAN. When the UE is in RRC _ INACTIVE state, the last serving gNB retains the UE's context and the NG connections associated with the UE with the serving AMF and UPF, as if the UE were in connected state from the core network perspective.
When the UE in RRC _ INACTIVE state moves out of the RNA range, a procedure of radio access network notification area Update (RNAU) is to be initiated, and the specific procedure is described above. When the UE initiates the RNAU procedure, the first network device (the newly serving gbb) sends a Path Switch Request (Path Switch Request) message to the AMF.
S502, when the access and mobility management function AMF receives a path switching request from the first network device, the path switching request counting function updates the number of times of the path switching request.
In the embodiment of the application, the number of times of receiving the PathSwitch Request is counted by adding a path switching Request counting function Num _ PathSwitch req to the core network side, and the initial count value of the path switching Request counting function Num _ PathSwitch req is 0. After triggering the RNAU flow, when the core network AMF receives the PathSwitchRequest for the first time, starting a Path switching Request counting function Num _ PathSwitchReq and performing addition processing, and when the AMF receives the PathSwitchRequest again, continuing the addition processing by the Num _ PathSwitchReq.
S503, when the access and mobility management function AMF receives a path switching request from the first network device, starting a radio access network basic notification area update timing function.
According to the embodiment of the application, the updating duration of the basic notification area of the radio access network is timed by adding the Timer _ RNA to the core network side. And the UE in the RRC _ Inactive state triggers an RNAU process, and starts a Timer _ RNA for timing after the core network AMF receives the PathSwitch Request for the first time.
S504, when the time of the wireless access network basic notification area updating timing function exceeds a preset first time length, and when the times of the path switching request reach a preset second threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network equipment.
In the embodiment of the application, the time length of the UE initiating the RNAU is judged according to the time length of the path switching request received by the AMF for the first time, the time number of the UE initiating the RNAU process is judged according to the time number of the path switching request received by the AMF, when the UE initiates the RNAU process for the first time and sends the path switching request to the AMF through the gNB, the UE initiates the RNAU process for multiple times and sends the path switching request to the AMF through the gNB, on one hand, the UE is continuously in the RRC _ Inactive state for a long time, on the other hand, the UE occupies a large amount of air interface signaling overhead, and on the other hand, the terminal energy consumption can be increased due to long-term and multiple interaction. Specifically, the user terminal is instructed to enter the idle state by using a preset first time length, namely, a time length of a path switching request received for the first time by the AMF, and a preset second threshold value, namely, a number of times of the path switching request as a judgment reference, at a certain time after the path switching request is received for the first time, and when the number of times of the path switching request exceeds the first threshold value. The specific setting of the first duration and the second threshold value can be set according to actual conditions, network environment and user requirements in combination, and various factors are comprehensively considered during deployment. The first duration and the second threshold are combined to be used as a basis for judging whether the user terminal is indicated to enter the idle state or not, so that the use state of the user terminal can be judged better, and the wireless connection state of the user terminal can be regulated, controlled and managed more accurately.
S505, the first network device releases the resource occupied by the user terminal according to the instruction indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
In the embodiment of the application, the first network device receives an instruction which is sent by the AMF and indicates that the user terminal enters the idle state, releases resources occupied by the user terminal, and notifies the user terminal to enter the idle state.
Further, in another wireless connection status management system in an inactive status of a ue provided in an embodiment of the present application, the method further includes:
when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the count of the path switch request count function needs to be zeroed.
When detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
It is understood that the UE may transition to the mobile and use state at any time due to a use requirement or a network trigger, for example, the UE may transition to the RRC _ CONNECTED state from the RRC _ INACTIVE state or transition to the RRC _ IDLE state from the RRC _ INACTIVE state due to a use requirement. In these two cases, it is necessary to wait for the UE to transition to the RRC _ INACTIVE state again, and then determine whether to instruct the UE to enter the idle state through the aforementioned system and process. Therefore, the radio access network basic notification area update timing function duration needs to be reset to zero.
Further, in the foregoing method for managing a wireless connection status of a ue in an inactive state according to an embodiment of the present application, the method further includes:
before the step that the first network equipment sends a path switching request to an access and mobile management function (AMF) of a core network side, sending a user terminal service data forwarding address to second network equipment;
the second network device is a network device which configures the last service that the user terminal enters into the inactive state.
In the inactive state of the user terminal, the UE disconnects the RRC connection with the network device, and the gNB configuring the UE to enter the last service reserves the context of the UE and the NG connections associated with the UE and serving AMF and UPF. Here, the gNB where the UE entered the last service is configured as the second network device. In order to prevent loss of Downlink (DL) user data buffered in the second network device (the last serving gNB), the first network device (the newly serving gNB) sends a user terminal service data forwarding address to the second network device (the last serving gNB), and the second network device receives the user terminal service data forwarding address sent by the first network device to the second network device.
The following describes the method for managing the radio connection status of the ue in the inactive state in detail with reference to the global flowchart.
Referring to fig. 6, in the present application, a Timer _ RNA is added at the core network side, and a number of times counter Num _ PathSwitch req is received. The terminal in the RRC _ Inactive state triggers an RNA Update flow, when a core network receives a PathSwitch Request for the first time, a Timer _ RNA is started, a PathSwitch Request frequency counter Num _ PathSwitch req is received, and one is added;
when the count of the counter Num _ PathSwitchReq exceeds a threshold value, the base station side is triggered to release the context flow.
When the Timer _ RNA is out of time and Num _ pathswitch req is greater than or equal to 2 (in this example, the second threshold is set to be 1, and if the second threshold is exceeded, Num _ pathswitch req is greater than or equal to 2), the base station side is triggered to release the context flow.
Signaling flow diagram of core network initiated active release UE see fig. 7.
When the state of the terminal RRC _ Inactive is changed due to any flow, stopping a Timer _ RNA, and clearing a counter Num _ PathSwitchReq; when the terminal returns to the RRC _ Inactive state again, the process flow described above is entered again.
According to the wireless connection state management system and method for the user terminal in the non-activated state, on the basis of existing counting, a Timer _ RNA and a PathSwitch Request time counter Num _ PathSwitch req are added on the core network side, when the user terminal triggers an RNAU process, the Timer _ RNA is started after the core network receives the PathSwitch Request for the first time, the Num _ PathSwitch req counts the PathSwitch Request, and therefore the specific use state of the user terminal in the non-activated state is judged, and the user terminal is adjusted to be in an idle state according to the specific use state. According to the technical scheme, only the path switching request counting function and the wireless access network basic notification area updating timing function are added on the core network side, the RANU flow can be limited without additionally adding an information flow and air interface signaling overhead, and the purposes of saving the signaling overhead and UE energy consumption are achieved.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A system for managing an inactive radio connection status of a user equipment, comprising:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
a path switching request counting function, which is deployed at a core network side and used for updating the path switching request count when the access and mobility management function (AMF) receives a path switching request from the first network device;
an access and mobility management function AMF, deployed on a core network side, for receiving a path switching request sent by a first network device,
the access and mobility management function AMF is further configured to: when the times of the path switching request exceed a preset first threshold value, sending an instruction for indicating the user terminal to enter an idle state to first network equipment;
the first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
2. The system of claim 1, wherein the path switch request counting function is further configured to: when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
3. A system for managing an inactive radio connection status of a user equipment, comprising:
the first network equipment is deployed at an access network side and used for sending a path switching request to an access and mobility management function (AMF) at a core network side according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
a path switching request counting function, which is deployed at a core network side and used for updating the path switching request count when the access and mobility management function (AMF) receives a path switching request from the first network device;
a radio access network basic notification area update timing function deployed on a core network side, configured to start the radio access network basic notification area update timing function when an access and mobility management function AMF receives a path switching request from a first network device;
an access and mobility management function AMF, deployed on a core network side, for receiving a path switching request sent by a first network device,
the access and mobility management function AMF is further configured to: when the timing of the wireless access network basic notification area updating timing function exceeds a preset first time length and when the frequency of the path switching request reaches a preset second threshold value, sending an instruction for indicating the user terminal to enter an idle state to first network equipment;
the first network device is further to: and releasing the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informing the user terminal of entering the idle state.
4. The system of claim 3, wherein the path switch request counting function is further configured to: when the user terminal is detected to be converted into a connection state or an idle state, the counting of the path switching request counting function returns to zero;
the radio access network based notification area update timing function is further to: when detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
5. The system of any one of claims 1-4, further comprising: the second network equipment is used for configuring the last service of the user terminal entering the non-activated state;
the second network device is further to: before the step of sending a path switching request to an access and mobility management function (AMF) of a core network side by the first network equipment, receiving a user terminal service data forwarding address sent to the second network equipment by the first network equipment.
6. A wireless connection state management method for a user terminal in an inactive state is characterized by comprising the following steps:
the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
when the access and mobile management function AMF receives a path switching request from the first network equipment, the path switching request counting function updates the path switching request times;
when the number of times of the path switching request exceeds a preset first threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network equipment;
the first network equipment releases the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
7. The method for managing a radio connection status in an inactive state of a user equipment according to claim 6, wherein the method further comprises:
when the user terminal is detected to be converted into the connection state or the idle state, the counting number of the path switching request counting function returns to zero.
8. A wireless connection state management method for a user terminal in an inactive state is characterized by comprising the following steps:
the first network equipment sends a path switching request to an access and mobility management function (AMF) according to a wireless access network basic notification area updating process of a user terminal in an inactive state;
when the access and mobile management function AMF receives a path switching request from the first network equipment, the path switching request counting function updates the path switching request times;
when the access and mobile management function AMF receives a path switching request from a first network device, starting a wireless access network basic notification area updating timing function;
when the timing of the wireless access network basic notification area updating timing function exceeds a preset first time length and when the frequency of the path switching request reaches a preset second threshold value, the access and mobile management function AMF sends an instruction for indicating the user terminal to enter an idle state to the first network equipment;
the first network equipment releases the resources occupied by the user terminal according to the instruction for indicating the user terminal to enter the idle state, and informs the user terminal to enter the idle state.
9. The method for managing a radio connection status in an inactive state of a user equipment according to claim 8, wherein the method further comprises:
when the user terminal is detected to be converted into a connection state or an idle state, the counting of the path switching request counting function returns to zero;
when detecting that the user terminal is converted into a connection state or an idle state, the wireless access network basic notification area updating timing function duration returns to zero.
10. The method for managing radio connection status in an inactive state of a user equipment according to any one of claims 6 to 9, wherein the method further comprises:
before the step of sending a path switching request to an access and mobility management function (AMF) of a core network side by the first network equipment, sending a user terminal service data forwarding address to second network equipment;
the second network device is a network device which configures the last service that the user terminal enters into the inactive state.
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