CN117793644A

CN117793644A - Method and device for updating cell identifier

Info

Publication number: CN117793644A
Application number: CN202211203419.8A
Authority: CN
Inventors: 朱方园
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2024-03-29
Also published as: WO2024067224A1

Abstract

The application provides a method and a device for updating cell identifiers. In the method, when the first device knows that the second device has the mobility, the first device can send a subscription message, where the subscription message is used to subscribe to an update event of a cell identifier corresponding to the second device, so that when the cell identifier corresponding to the second device changes, the first device can timely learn the latest cell identifier corresponding to the second device. The second device is a mobile access backhaul integrated node or a mobile base station relay node, and the first device is a core network device, for example, a location management function LMF network element or an access and mobility management function AMF network element. If the network can timely acquire the cell identifier corresponding to the second device, the network is favorable for positioning the position of the terminal device accessed to the network through the second device, and the positioning accuracy of the terminal device is improved.

Description

Method and device for updating cell identifier

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for updating a cell identifier.

Background

With the development of communication technology, relay devices are widely used. In a fifth generation (the fifth generation, 5G) of New Radio (NR) research on mobile communication systems, a node of an access backhaul integration (integrated access and backhaul, IAB) integrating a radio access link and a radio backhaul link is proposed. The IAB node accesses a base station serving it in a terminal-like manner over a radio interface, which is called a home base station (donor base station), and the radio interface link between the IAB node and the home base station is called a backhaul link. The IAB node provides similar functions and services to the terminals accessing its cell as a normal base station, and the communication link between the IAB node and the terminals is called an access link.

Generally, the IAB node may be deployed in a scenario where a wired transmission network is not easily deployed, such as outdoors, indoors, etc., and is generally fixed on the ground or in a building, without mobility. In the existing positioning scheme, the terminal device accesses to the IAB node with a fixed position, and the network can determine the position of the terminal device according to the uplink positioning message (UL positioning message) sent by the terminal device to the network and the cell information of the IAB node. The uplink positioning message contains the measurement result and the cell identification of the cell based on which cell the terminal equipment makes.

However, with the widespread use of mobile relays, for example, in-vehicle relays (vehicle mounted relay, VMR) in which the mobile relay is mounted on a vehicle, so that terminal devices located in or around the vehicle can achieve access to the network through the mobile relay, the VMR node can be understood as an IAB node having mobility. Based on the existing positioning scheme, although the terminal equipment can use the cell signal of the VMR node to perform positioning measurement, the cell position of the VMR node is continuously changed, the cell identifier is also continuously changed, and the network cannot timely acquire the updated cell identifier.

Disclosure of Invention

The application provides a method and a device for updating a cell identifier, which enable a network to timely acquire the latest cell identifier broadcasted by a cell.

In a first aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including a first device and a second device, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: when the first device knows that the second device has the mobility, the first device sends a first message, wherein the first message is used for subscribing an update event of a cell identifier corresponding to the second device; when the cell identifier corresponding to the second device changes, the first device receives a second message, where the second message is used to notify the updated cell identifier corresponding to the second device.

In the embodiment of the present application, when knowing that the cell corresponding to the second device has mobility, the first device may initiate a subscription procedure, so as to timely learn the latest cell identifier broadcasted by the second device, so that the first device obtains, based on the latest cell identifier broadcasted by the second device, current location information of the second device, where the location information may be used to locate a location of a terminal device connected to the second device, and improve location accuracy of the terminal device.

The first message may also be referred to as a subscription request or subscription message and the second message may also be referred to as a subscription response or subscription notification.

With reference to the first aspect, in a possible implementation manner, the communication system further includes a third device, where the first device sends a first message, including: the first device sends a first message to the third device, wherein the first message is used for subscribing to an update event of a cell identifier corresponding to the second device; the first device receiving a second message comprising: the first device receives the second message through the third device.

In the implementation manner, the first device initiates a subscription flow, specifically sends a subscription request to the third device, and when the cell identifier broadcasted by the second device changes, receives a subscription notification from the third device, and timely acquires the latest cell identifier broadcasted by the second device.

With reference to the first aspect, in one possible implementation manner, the first device is a location management function LMF network element, and the third device is an access and mobility management function AMF network element.

In the implementation manner, the LMF network element initiates a subscription flow, specifically sends a subscription request to the AMF network element, and receives a subscription notification from the AMF network element when the cell identifier broadcasted by the second device changes, so as to timely acquire the latest cell identifier broadcasted by the second device.

With reference to the first aspect, in one possible implementation manner, the first device is an AMF network element, and the third device is an access network device.

In the implementation manner, the AMF network element initiates a subscription flow, specifically sends a subscription request to the access network device, receives a subscription notification from the access network device when the cell identifier broadcasted by the second device changes, and timely acquires the latest cell identifier broadcasted by the second device.

The access network device may be a home base station.

With reference to the first aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the first aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In a second aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including a second device, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the second equipment receives a first message, wherein the first message is used for subscribing an updating event of a cell identifier corresponding to the second equipment; when the cell identifier corresponding to the second device changes, the second device sends a second message, where the second message is used to notify the updated cell identifier corresponding to the second device.

In the embodiment of the application, the second device receives the first message, and acquires that the device initiates the subscription event for updating the cell identifier corresponding to the second device, and if the cell identifier broadcasted by the second device changes in the moving process of the second device, the second device can return the second message to the device sending the first message for notifying the device that the cell identifier broadcasted by the second device changes, so that the device initiating the subscription event is ensured to timely acquire the latest cell identifier broadcasted by the second device.

With reference to the second aspect, in a possible implementation manner, the communication system further includes a first device and a third device, where the second device receives the first message, and includes: the second device receives the first message from the first device through the third device; the second device sending the second message, comprising: the second device sends the second message to the first device through the third device.

In the implementation manner, the first device is a device initiating a subscription event for updating the cell identifier corresponding to the second device, the first device sends a subscription request to the second device through the third device, and when the cell identifier broadcasted by the second device changes, the second device can send a subscription notification to the first device through the third device, so that the first device initiating the subscription event is ensured to know the latest cell identifier broadcasted by the second device in time.

With reference to the second aspect, in one possible implementation manner, the first device is a location management function LMF network element, and the third device is an access and mobility management function AMF network element.

In the implementation manner, the LMF network element is a device that initiates a subscription event for updating the cell identifier corresponding to the second device, and sends a subscription request to the second device through the AMF network element, and when the cell identifier broadcasted by the second device changes, the second device can send a subscription notification to the LMF network element through the AMF network element, so that the LMF network element is ensured to learn the latest cell identifier broadcasted by the second device in time.

With reference to the second aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the second aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In a third aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including a second device and a third device, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the third device receives a first message, wherein the first message is used for subscribing to an update event of a cell identifier corresponding to the second device; and when the third device knows that the cell identifier corresponding to the second device is changed, the third device sends a second message, and the second message is used for notifying the updated cell identifier corresponding to the second device.

In the embodiment of the application, the third device receives the first message, acquires that the device initiates the subscription event for updating the cell identifier corresponding to the second device, and returns the second message to the device sending the first message when the third device acquires that the cell identifier corresponding to the second device changes, so as to notify the device broadcasting the second device of the change of the cell identifier, thereby ensuring that the device initiating the subscription event timely acquires the latest cell identifier broadcasted by the second device.

With reference to the third aspect, in one possible implementation manner, the communication system further includes a first device, and the third device receives the first message, including: the third device receiving the first message from the first device; the third device sending a second message comprising: the third device sends the second message to the first device.

In this implementation manner, the third device receives the subscription request from the first device, and may learn that the first device is a device that initiates a subscription event for updating the cell identifier corresponding to the second device. When the third device knows that the cell identifier corresponding to the second device changes, subscription notification can be sent to the first device, so that the first device is ensured to know the latest cell identifier broadcasted by the second device in time.

With reference to the third aspect, in one possible implementation manner, the first device is an access and mobility management function AMF network element, and the third device is an access network device.

In this implementation manner, the access network device receives a subscription request from the AMF network element, and may learn that the AMF network element is a device that initiates a subscription event for updating the cell identifier corresponding to the second device. When the access network equipment knows that the cell identifier corresponding to the second equipment is changed, subscription notification can be sent to the AMF network element, so that the AMF network element is ensured to know the latest cell identifier broadcasted by the second equipment in time.

With reference to the third aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the third aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In a fourth aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including an access network device, a second device, and an AMF network element, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the access network device receives a third message from the second device, the third message including an identification of the second device; and the access network equipment sends a fourth message to the AMF network element, wherein the fourth message comprises the identification of the second equipment and the cell identification corresponding to the second equipment.

In the embodiment of the application, the second device is connected to the network through the access network device. After receiving the identifier of the second device, the access network device may send the identifier of the second device and the cell identifier corresponding to the second device to the AMF network element, so that the AMF network element stores the identifier of the second device and the cell identifier corresponding to the second device, and thus, other network elements, for example, the LMF network element, may learn the cell identifier corresponding to the second device from the AMF network element.

With reference to the fourth aspect, in one possible implementation manner, the third message includes an F1 setup request (F1 step request) message.

With reference to the fourth aspect, in a possible implementation manner, the cell identifier corresponding to the second device in the fourth message is a cell identifier allocated by the access network device to the second device.

With reference to the fourth aspect, in a possible implementation manner, the method further includes: the access network equipment receives a fifth message from the second equipment, wherein the fifth message is used for indicating the release of the F1 link; and the access network equipment sends a sixth message to the AMF network element, wherein the sixth message is used for indicating the AMF network element to delete the identifier of the second equipment and the cell identifier corresponding to the second equipment.

In this implementation manner, the access network device receives the indication of releasing F1, and releases the communication link with the second device, so that the access network device may notify the AMF network element, so that the AMF network element deletes the identifier of the second device that has failed and the cell identifier corresponding to the second device.

With reference to the fourth aspect, in a possible implementation manner, the fourth message or the sixth message sent by the access network device to the AMF network element includes an NG configuration update (NG configuration update) message.

In a fifth aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including an access network device, a second device, an AMF network element with an access and mobility management function, and an NRF network element with a network storage function, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the AMF network element receives a fourth message from the access network device, wherein the fourth message comprises the identification of the second device and the cell identification corresponding to the second device; the AMF network element sends a seventh message to the NRF network element, wherein the seventh message comprises the identifier of the second device and the cell identifier corresponding to the second device.

In this embodiment of the present invention, after receiving the identifier of the second device and the cell identifier corresponding to the second device, the AMF network element may send the identifier of the second device and the cell identifier corresponding to the second device to the NRF network element, so that the NRF network element stores the identifier of the second device and the cell identifier corresponding to the second device, so that other network elements, for example, the LMF network element may learn the cell identifier corresponding to the second device from the NRF network element.

With reference to the fifth aspect, in a possible implementation manner, the cell identifier corresponding to the second device in the fourth message is a cell identifier allocated by the access network device to the second device.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: the AMF network element receives a sixth message from the access network device, wherein the sixth message is used for indicating the AMF network element to delete the identifier of the second device and the cell identifier corresponding to the second device; and the AMF network element sends an eighth message to the NRF network element, wherein the eighth message is used for indicating the NRF network element to delete the identifier of the second equipment and the cell identifier corresponding to the second equipment.

In this implementation manner, after receiving the indication of deleting the identifier of the second device and the cell identifier corresponding to the second device, the AMF network element synchronizes the indication to the NRF network element, so that the NRF network element deletes the identifier of the second device that has failed and the cell identifier corresponding to the second device.

With reference to the fifth aspect, in a possible implementation manner, the fourth message or the sixth message received by the AMF network element from the access network device includes an NG configuration update message.

With reference to the fifth aspect, in a possible implementation manner, the seventh message or the eighth message sent by the AMF network element to the NRF network element includes a network element update message.

In a sixth aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including an access network device and a second device, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the second device sends a third message to the access network device, the third message including an identification of the second device.

Optionally, the third message may further include TACs supported by the cells of the second device.

Optionally, the third message may further comprise a cell identity supported by the cell of the second device.

In this embodiment of the present invention, the second device sends a third message to inform the access network device of the identifier of the second device, so that after obtaining the cell identifier corresponding to the second device (may be the cell identifier allocated by the access network device to the second device or the cell identifier broadcasted by the second device), the access network device sends the cell identifier corresponding to the second device and the identifier of the second device to the network, so that the network timely obtains the cell identifier corresponding to the second device and the identifier of the second device.

With reference to the sixth aspect, in one possible implementation manner, the third message includes an F1 setup request (F1 step request) message.

With reference to the sixth aspect, in a possible implementation manner, the method further includes: the second device sends a fifth message to the access network device, where the fifth message is used to instruct release of the F1 link.

In this implementation manner, the second device sends the fifth message, so that the access network device releases the communication link with the second device, the access network device may delete the identifier of the second device and the cell identifier corresponding to the second device, and the access network device may also notify the network side to delete the identifier of the second device that has failed and the cell identifier corresponding to the second device.

In a seventh aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including a second device, an AMF network element with access and mobility management functions, and an NRF network element with network storage functions, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the NRF network element receives a seventh message from the AMF network element, wherein the seventh message comprises the identifier of the second equipment and the cell identifier corresponding to the second equipment; the NRF network element stores the identification of the second device and the cell identification corresponding to the second device.

In the embodiment of the present application, the NRF network element acquires the identifier of the second device and the cell identifier corresponding to the second device through the AMF network element, and the NRF network element stores the identifier of the second device and the cell identifier corresponding to the second device, so that other network elements, for example, the LMF network element, can acquire the cell identifier corresponding to the second device from the NRF network element.

With reference to the seventh aspect, in a possible implementation manner, the method further includes: the NRF network element receives an eighth message from the AMF network element, wherein the eighth message is used for indicating the NRF network element to delete the identifier of the second device and the cell identifier corresponding to the second device; and the NRF network element deletes the identifier of the second device and the cell identifier corresponding to the second device.

In the implementation manner, the NRF network element timely deletes the identifier of the second equipment which is invalid and the cell identifier corresponding to the second equipment based on the deletion instruction sent by the AMF network element.

With reference to the seventh aspect, in a possible implementation manner, the NRF network element receives a seventh message or an eighth message from the AMF network element, and the seventh message or the eighth message includes a network element update message.

With reference to the seventh aspect, in a possible implementation manner, the communication system further includes a location management function LMF network element, and the method further includes: the NRF network element receives a query request from the LMF network element, wherein the query request is used for querying the identifier of the second equipment associated with the cell identifier corresponding to the second equipment; the NRF network element sends a query response to the LMF network element, the query response including an identity of the second device associated with a cell identity corresponding to the second device.

In an eighth aspect, the present application provides a method for updating a cell identifier, which is applied to a communication system including a second device, a network storage function NRF network element, and a location management function LMF network element, where the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method includes: the LMF network element receives positioning measurement data from terminal equipment, the terminal equipment is accessed to a network through the second equipment, and the positioning measurement data comprises a cell identifier corresponding to the second equipment; the LMF network element sends a query request to the NRF network element, wherein the query request is used for querying the identifier of the second equipment associated with the cell identifier corresponding to the second equipment; the LMF network element receives a query response from the NRF network element, the query response including an identification of the second device associated with a cell identification corresponding to the second device.

In a ninth aspect, the present application provides a communication apparatus for a wireless backhaul network, the wireless backhaul network including a first device and a second device, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a sending unit, configured to send a first message when it is known that the second device has mobility, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; and the receiving unit is used for receiving a second message when the cell identifier corresponding to the second equipment is changed, wherein the second message is used for notifying the updated cell identifier corresponding to the second equipment. The first apparatus includes the communication device.

With reference to the ninth aspect, in a possible implementation manner, the wireless backhaul network further includes a third device, and the sending unit is configured to send a first message to the third device, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; the receiving unit is configured to receive the second message through the third device.

With reference to the ninth aspect, in one possible implementation manner, the first device is a location management function LMF network element, and the third device is an access and mobility management function AMF network element.

With reference to the ninth aspect, in one possible implementation manner, the first device is an AMF network element, and the third device is an access network device.

With reference to the ninth aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the ninth aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In a tenth aspect, the present application provides a communication apparatus for a wireless backhaul network including a second device, the second device being a mobile access backhaul integrated node or a mobile base station relay node, the apparatus comprising: a receiving unit, configured to receive a first message, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; and the sending unit is used for sending a second message when the cell identifier corresponding to the second equipment is changed, wherein the second message is used for notifying the updated cell identifier corresponding to the second equipment. The second apparatus includes the communication device.

With reference to the tenth aspect, in a possible implementation manner, the wireless backhaul network further includes a first device and a third device, and the receiving unit is configured to receive, by using the third device, the first message from the first device; the sending unit is configured to send, by using the third device, the second message to the first device.

With reference to the tenth aspect, in one possible implementation manner, the first device is a location management function LMF network element, and the third device is an access and mobility management function AMF network element.

With reference to the tenth aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the tenth aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In an eleventh aspect, the present application provides a communication apparatus for a wireless backhaul network including a second device and a third device, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a receiving unit, configured to receive a first message, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; and the sending unit is used for sending a second message when the cell identifier corresponding to the second equipment is known to be changed, wherein the second message is used for notifying the updated cell identifier corresponding to the second equipment. The third apparatus includes the communication device.

With reference to the eleventh aspect, in a possible implementation manner, the wireless backhaul network further includes a first device, and the receiving unit is configured to receive the first message from the first device; the sending unit is configured to send the second message to the first device.

With reference to the eleventh aspect, in one possible implementation manner, the first device is an access and mobility management function AMF network element, and the third device is an access network device.

With reference to the eleventh aspect, in a possible implementation manner, the first message includes an identification of the second device.

With reference to the eleventh aspect, in a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In a twelfth aspect, the present application provides a communication apparatus for a wireless backhaul network, the wireless backhaul network including an access network device, a second device, an access and mobility management function AMF network element, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a receiving unit configured to receive a third message from the second device, where the third message includes an identification of the second device; a sending unit, configured to send a fourth message to an AMF network element, where the fourth message includes an identifier of the second device and a cell identifier corresponding to the second device. The access network device comprises the communication means.

With reference to the twelfth aspect, in one possible implementation manner, the third message includes an F1 setup request (F1 step request) message.

With reference to the twelfth aspect, in a possible implementation manner, the cell identifier corresponding to the second device in the fourth message is a cell identifier allocated by the access network device to the second device.

With reference to the twelfth aspect, in a possible implementation manner, the receiving unit is further configured to receive a fifth message from the second device, where the fifth message is used to indicate that the F1 link is released; the sending unit is further configured to send a sixth message to the AMF network element, where the sixth message is used to instruct the AMF network element to delete the identifier of the second device and the cell identifier corresponding to the second device.

With reference to the twelfth aspect, in a possible implementation manner, the fourth message or the sixth message that the sending unit sends to the AMF network element includes an NG configuration update (NG configuration update) message.

In a thirteenth aspect, the present application provides a communication apparatus for a wireless backhaul network, the wireless backhaul network including an access network device, a second device, an AMF network element for access and mobility management and an NRF network element for network storage, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a receiving unit, configured to receive a fourth message from the access network device, where the fourth message includes an identifier of the second device and a cell identifier corresponding to the second device; the sending unit is configured to send a seventh message to the NRF network element, where the seventh message includes an identifier of the second device and a cell identifier corresponding to the second device. The AMF network element comprises the communication device.

With reference to the thirteenth aspect, in a possible implementation manner, the cell identifier corresponding to the second device in the fourth message is a cell identifier allocated by the access network device to the second device.

With reference to the thirteenth aspect, in a possible implementation manner, the receiving unit is further configured to receive a sixth message from the access network device, where the sixth message is used to instruct the AMF network element to delete the identifier of the second device and a cell identifier corresponding to the second device; the sending unit is further configured to send an eighth message to the NRF network element, where the eighth message is used to instruct the NRF network element to delete the identifier of the second device and the cell identifier corresponding to the second device.

With reference to the thirteenth aspect, in a possible implementation manner, the receiving unit receives a fourth message or a sixth message from the access network device, where the fourth message or the sixth message includes an NG configuration update message.

With reference to the thirteenth aspect, in a possible implementation manner, the seventh message or the eighth message that the sending unit sends to the NRF network element includes a network element update message.

In a fourteenth aspect, the present application provides a communication apparatus for a wireless backhaul network including an access network device and a second device, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: and the sending unit is used for sending a third message to the access network equipment, wherein the third message comprises the identification of the second equipment. The second apparatus includes the communication device.

With reference to the fourteenth aspect, in one possible implementation manner, the third message includes an F1 setup request (F1 step request) message.

With reference to the fourteenth aspect, in a possible implementation manner, the sending unit is further configured to send a fifth message to the access network device, where the fifth message is used to indicate to release the F1 link.

In a fifteenth aspect, the present application provides a communication apparatus for a wireless backhaul network, the wireless backhaul network including a second device, an access and mobility management function AMF network element, and a network storage function NRF network element, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a receiving unit, configured to receive a seventh message from the AMF network element, where the seventh message includes an identifier of the second device and a cell identifier corresponding to the second device; and the storage unit is used for storing the identification of the second equipment and the cell identification corresponding to the second equipment. The NRF network element comprises the communication device.

With reference to the fifteenth aspect, in a possible implementation manner, the receiving unit is further configured to receive an eighth message from the AMF network element, where the eighth message is used to instruct the NRF network element to delete the identifier of the second device and a cell identifier corresponding to the second device; the storage unit is further configured to delete an identifier of the second device and a cell identifier corresponding to the second device.

With reference to the fifteenth aspect, in a possible implementation manner, the receiving unit receives a seventh message or an eighth message from the AMF network element, where the seventh message or the eighth message includes a network element update message.

With reference to the fifteenth aspect, in a possible implementation manner, the wireless backhaul network further includes a location management function LMF network element, the receiving unit is further configured to receive a query request from the LMF network element, where the query request is used to query an identifier of the second device associated with a cell identifier corresponding to the second device; the apparatus further comprises: and the sending unit is used for sending a query response to the LMF network element, wherein the query response comprises the identification of the second equipment associated with the cell identification corresponding to the second equipment.

In a sixteenth aspect, the present application provides a communication apparatus for a wireless backhaul network, the wireless backhaul network including a second device, a network storage function NRF network element, and a location management function LMF network element, the second device being a mobile access backhaul integration node or a mobile base station relay node, the apparatus comprising: a receiving unit, configured to receive positioning measurement data from a terminal device, where the terminal device accesses a network through the second device, and the positioning measurement data includes a cell identifier corresponding to the second device; a sending unit, configured to send a query request to the NRF network element, where the query request is used to query an identifier of the second device associated with a cell identifier corresponding to the second device; the receiving unit is further configured to receive a query response from the NRF network element, where the query response includes an identifier of the second device associated with a cell identifier corresponding to the second device. The LMF network element includes the communication device. The LMF network element includes the communication device.

In a seventeenth aspect, the present application provides a communication apparatus for a wireless backhaul network, comprising: a transceiver, a memory, and a processor; the transceiver is configured to receive or transmit signals or data, the memory is configured to store program instructions or data, and the processor is configured to invoke the program instructions in the memory to perform the method as described in any of the above aspects or any of the possible implementations of any of the above aspects.

In an eighteenth aspect, the present application provides a computer readable medium storing program code for computer execution, the program code comprising instructions for performing a method as described above or in any one of the possible implementations of the above.

In a nineteenth aspect, the present application provides a computer program product comprising computer program code for, when run on a computer, causing the computer to carry out the method according to any one of the above aspects or any one of the possible implementations thereof.

In a twentieth aspect, the present application provides a chip comprising: the device comprises an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method in any one of the above aspects or any one of the possible implementation manners of the above aspects.

Drawings

Fig. 1 is an architecture diagram of an IAB network system suitable for use in the technical solutions of the present application;

FIG. 2 is a schematic diagram of an IAB network architecture and interfaces suitable for use in the aspects of the present application;

FIG. 3 is a flow chart of a communication method suitable for use in the IAB network architecture of FIG. 2;

FIG. 4 is a schematic diagram of a communication system including MBSR;

fig. 5 is a schematic diagram of a positioning procedure of an MBSR cell provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a method for updating a cell identifier according to an embodiment of the present application;

fig. 7 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application;

fig. 8 is a schematic diagram of another method for updating cell identities according to an embodiment of the present application;

fig. 9 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application;

fig. 10 is a schematic diagram of another method for updating cell identities according to an embodiment of the present application;

fig. 11 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device for a wireless backhaul network according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another communication device for a wireless backhaul network according to an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

Communication systems mentioned in embodiments of the present application include, but are not limited to: a narrowband internet of things (NB-IoT) system, a wireless local area network (wireless local access network, WLAN) system, a long term evolution (Long Term Evolution, LTE) system, a 5G mobile communication system, or a 5G later evolution communication system.

Referring to fig. 1, fig. 1 is an architecture diagram of an IAB network system suitable for the technical solution of the present application. As shown in fig. 1, an IAB network system includes at least one base station 100, and one or more terminal devices (terminals) 101 served by the base station 100, one or more relay nodes (i.e., IAB nodes) 110, and one or more terminal devices 111 served by the IAB nodes 110. Typically, the base station 100 is referred to as a home base station (donor next generation node B, dgNB), and the IAB node 110 is connected to the base station 100 via a wireless backhaul link 113. The home base station is also referred to herein as a home node, i.e., a Donor node. The IAB network is also called a wireless backhaul network.

Base station 100 includes, but is not limited to: an evolved node B (evolved node base, eNB), a radio network controller (radio network controller, RNC), a Node B (NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved NodeB, or home node B, HNB), a baseband Unit (BBU), an evolved LTE (LTE) base station, an NR base station (next generation node B, gNB), and the like.

Terminal devices include, but are not limited to: a User Equipment (UE), a mobile station, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a terminal, a wireless communication device, a user agent, a Station (ST) in a wireless local area network (wireless local access network, WLAN), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capability, a computing device, other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a mobile station in a future 5G network, a terminal device in a future evolved public land mobile network (public land mobile network, PLMN) network, and the like.

The IAB node is a specific name of a relay node, and is not limited to the configuration of the solution of the present application, and may be a network type relay (e.g., a base station) having a forwarding function or a terminal type relay (e.g., a terminal device) having a forwarding function.

The IAB network system may also include a plurality of other IAB nodes, such as IAB node 120 and IAB node 130. As shown in fig. 1, the IAB node 120 is connected to the IAB node 110 by a wireless backhaul link 123 for access to the network. The IAB node 130 is connected to the IAB node 110 by a wireless backhaul link 133 for access to the network. The IAB node 120 serves one or more terminal devices 121 and the IAB node 130 serves one or more terminal devices 131. In fig. 1, both the IAB node 110 and the IAB node 120 are connected to the network via wireless backhaul links. In this application, the wireless backhaul links are all from the perspective of the relay node, for example, the wireless backhaul link 113 is the backhaul link of the IAB node 110, and the wireless backhaul link 123 is the backhaul link of the IAB node 120. The relay node may be connected to the network via a multi-level wireless relay node. It should be understood that the use of an IAB node in this application is for descriptive purposes only and does not represent a scenario in which the solution of this application is only used for NR, in this application an IAB node may refer broadly to any node or device with a relay function, and the use of an IAB node and a relay node in this application should be understood to have the same meaning.

For ease of understanding, basic terms related to embodiments of the present application are briefly described below.

1. Wireless backhaul node and host node

In the embodiment of the present application, a node supporting integrated access and backhaul is referred to as a wireless backhaul node. In an LTE communication system, the wireless backhaul node may also be referred to as a Relay Node (RN), and in 5G, the wireless backhaul node may also be referred to as an IAB node (IAB node). The wireless backhaul node may have a role of a Mobile Terminal (MT) and a role of a Distributed Unit (DU), i.e. the wireless backhaul node may include at least one MT unit, and the wireless backhaul node may establish a backhaul link between the at least one MT unit and at least one parent node (IAB node or other IAB nodes) of the wireless backhaul node. The DU portion of the IAB node may provide access services for the terminal or MT portion of other IAB nodes. For convenience of description, an IAB node is described as an example.

The IAB node may provide radio access services for terminal devices whose data (which may include user plane data and control plane signaling) is transmitted by the IAB node over a radio backhaul link connection to the home node.

In the embodiments of the present application, the host node is also referred to as an IAB host (IAB donor) or a host base station (donor gnob, dgNB). Specifically, the DgNB may be an access network element with a complete base station function, or may be an access network element including a Centralized Unit (CU) and a Distributed Unit (DU) in a separate form. The CU mainly handles non-real-time radio higher layer protocol stack functions (including radio resource control RRC layer/packet data convergence protocol PDCP layer), and the DU mainly handles physical layer functions and layer 2 functions with higher real-time requirements (physical PHY layer/medium access control MAC layer/radio link control RLC layer). The DgNB is connected to a core network element serving the terminal device, e.g. to a 5G core network (5G core,5 gc), and provides radio backhaul functions for the IAB node. For convenience of description, the embodiment of the present application refers to the centralized unit of the host node as a host CU (donor CU), and the distributed unit of the host node as a host DU (donor DU), where the donor CU may also be a Control Plane (CP) or a User Plane (UP) separated form, for example, one CU includes one CU-CP and multiple CU-UP components, which is not limited in the embodiment of the present application.

2. Access link

A wireless link used when a terminal device communicates with a node (e.g., an IAB node, a home node, or a home DU) that provides wireless access service to it, includes an access link for uplink transmission and an access link for downlink transmission. The access link for uplink transmission, also called uplink access link or access uplink, is the transmission direction from the terminal device to the node; the access link for downlink transmission is also referred to as downlink access link or access downlink, the transmission direction of which is from the node to the terminal device.

3. Backhaul link

The backhaul link refers to a wireless link used when a certain IAB node communicates with its parent node, where the parent node may be an IAB node or a host node, and includes a backhaul link for uplink transmission and a backhaul link for downlink transmission. For example, in fig. 1, the parent node of the IAB node 120 is the IAB node 110, and the parent node of the IAB node 110 is the base station 100. The backhaul link used for uplink transmission is also referred to as an uplink backhaul link or backhaul uplink, and its transmission direction is from the IAB node to the parent node of the IAB node. The backhaul link used for downlink transmission is also referred to as a downlink backhaul link or backhaul downlink, and its transmission direction is from the parent node of the IAB node to the IAB node.

Referring to fig. 2, fig. 2 is a schematic diagram of an IAB network architecture and an interface suitable for the technical solution of the present application. As shown in fig. 2, the IAB structure includes a 5G core network (5 GC), an NG radio access network (NG RAN) including a base station (gNB), an IAB host (IAB node), and an IAB node (IAB node), which accesses the network through the IAB host. Specifically, the 5GC is connected to one or more gnbs (or IAB hosts) through an NG interface. The IAB host comprises a host CU (donor CU) and a host DU (donor DU), wherein the host CU and the host DU are connected through an F1 interface, the host CU is connected with the 5GC through an NG interface, and the host CU is connected with the gNB through an Xn-C interface. The IAB node comprises an IAB MT and an IAB DU, wherein the IAB MT is connected with the host DU through an NR Uu interface, and the IAB DU is connected with the host CU through an F1 interface.

Based on the IAB structure of fig. 2, the following briefly describes the flow of IAB MT network entry, F1 establishment, and cell activation. Referring to fig. 3, fig. 3 is a flow chart of a communication method suitable for use in the IAB network architecture shown in fig. 2. As shown in fig. 3, the communication method includes:

step 301. The IAB node establishes an RRC connection with a radio access network (radio access network, RAN) serving the IAB node through the MT function.

Specifically, the IAB MT performs cell selection, after selecting a suitable cell to complete RRC connection establishment, indicates to the network that it has mobility (i.e., indicates that it is an IAB node) through a RRC Setup Complete message, and sends a registration request message through the RAN serving the IAB MT. In the above procedure, the initial access of the IAB node is the same as that of the conventional UE.

Step 302. The ran sends a registration request message to the 5G core network via an N2 message, while indicating in the N2 message that the network is an IAB node, which the network will authenticate.

Step 303. The iab MT completes the registration procedure and successfully registers in the network.

Step 304. The IAB MT initiates session establishment, the network assigns an internet protocol, IP, address to the IAB MT, which the IAB MT uses to interact with operation administration and maintenance (operation administration and maintenance, OAM).

Step 305.Oam configures the IAB node with cell information. The cell information includes, for example, cell identity, tracking area code (tracking area code, TAC), etc.

Step 306.IAB DU selects the appropriate IAB donor and sends an F1 setup request (F1 step request) message to the donor CU of IAB donor. The F1 setup request message includes cell information supported by the IAB DU, such as cell identification, TAC, etc.

Step 307. The donor CU activates the cell of the IAB DU. Optionally, the donor DU may send configuration information to the 5G core network through a configuration update procedure, where the configuration information carries TAC information.

Step 308. The donor CU sends an F1 setup response to the IAB DU, where the F1 setup response includes activated cell information (cells to be activated list), and the activated cell information includes information such as a cell identifier and a TAC.

Steps 306 to 308 described above establish a flow for the F1 of the IAB node.

In the above communication process, the IAB node is typically a relay device that is stationary on the ground. In the existing 5G positioning scheme, the UE sends an uplink positioning message (UL positioning message) to the network, where the uplink positioning message includes a measurement result, and the measurement result includes a cell identifier, and the network (such as a location management service LMF network element) can determine, based on the cell identifier, on which cell the UE makes a measurement. Further, the network determines the location of the UE based on the location of the cell and the measurement result. It can be understood that the existing cells are all fixed, and the network can obtain the geographical location information of the cells in advance and locate the UE in combination with the measurement result reported by the UE.

However, if the cell to which the UE accesses is a mobile base station relay (mobile base station relay, MBSR), which is also called VMR or mobile IAB, and the cell is in a mobile state, when the UE performs positioning measurement using a cell signal of the MBSR, the network needs to know the location of the MBSR cell in order to accurately calculate the location information of the UE. Referring to fig. 4, fig. 4 is a schematic diagram of a communication system including an MBSR. As shown in fig. 4, a user carries an intelligent terminal to take a vehicle, and an MBSR installed on the vehicle can provide a 5G access service for the user in the vehicle, and as the vehicle moves, the location of the MBSR cell changes continuously, and although the intelligent terminal carried by the user can use the MBSR cell signal to perform positioning measurement, the network does not know the current location of the cell.

In this regard, the network also needs to initiate positioning of the MBSR to obtain the cell location of the MBSR. Referring to fig. 5, fig. 5 is a schematic diagram of a positioning procedure of an MBSR cell provided in an embodiment of the present application. As shown in fig. 5, the positioning process includes:

step 500. The lmf network element obtains whether a cell corresponding to a certain cell identifier is a mobile cell by sending a transmission-reception point (TRP) information interaction procedure. Step 500 may include:

step 500a.lmf network element sends an NRPPa TRP information request (NRPPa TRP information request) to the host base station (donor gNB).

Step 500B. The host base station sends an F1 TRP information request to the MBSR. The MBSR is one of the mobile relay devices within the coverage area of the home base station.

Step 500c. MBSR sends an F1 TRP information response to the hosting base station, the F1 TRP information response comprising a mobility indication (mobile indication) informing that the cell of MBSR is a moving cell. Optionally, the F1 TRP information response includes a cell identification of the MBSR.

Step 500D. The host base station sends an NRPPa TRP information response (NRPPa TRP information response) to the LMF network element, the NRPPa TRP information response comprising a mobility indication. Optionally, the NRPPa TRP information response includes a cell identification of the MBSR.

Step 501, when the network needs to initiate a positioning process to a certain UE, an access and mobility management function AMF network element triggers to initiate positioning to the UE.

Step 502. The amf network element sends a positioning request to the LMF network element, for example, a nlmf_location_ Determine Location Request is sent, where the positioning request is used to request the LMF network element to initiate positioning for the UE.

Step 503. Perform the existing positioning procedure. Specifically, when the UE performs positioning measurement using the cell signal of the MBSR, the UE carries positioning measurement data in an uplink positioning message, where the positioning measurement data includes a cell identifier (cell ID).

Optionally, if the cell identifier responded by the F1 TRP information in step 500D is the same as the cell identifier included in the positioning measurement data reported by the UE, the LMF network element may learn that the cell corresponding to the cell identifier included in the positioning measurement data has mobility, and the LMF network element may perform the following steps:

step 504a. Lmf network element sends a cell location request, e.g. an NRPPa TRP information request comprising the cell identity of the MBSR, to the host base station.

Step 504B. The host base station sends a cell location request, e.g., an F1 TRP information request, to the MBSR, the F1 TRP information request including the cell identity of the MBSR.

Step 504c. MBSR sends a cell location response, e.g. an F1 TRP information response, to the host base station, the F1 TRP information response comprising location information of the cell to which the cell identity of the MBSR corresponds.

Step 504D. The host base station sends a cell location response, e.g., an NRPPa TRP information response including location information of the cell corresponding to the cell identity of the MBSR, to the LMF network element.

Based on steps 504A to 504d, the lmf network element may learn the latest location information of the mobile cell.

Step 505. The lmf network element sends a positioning response to the AMF network element, the positioning response comprising the location of the UE.

Specifically, the LMF network element determines the location of the UE according to the location measurement data reported by the UE in step 503 and the location information of the cell corresponding to the cell identifier of the MBSR in step 504D.

As can be seen from the positioning procedure described in fig. 5, during the movement of the MBSR, the cell identity broadcasted by the same MBSR may change, which causes a problem: the cell identity of the MBSR included in the uplink positioning message of the UE may be different from the cell identity of the MBSR stored in the LMF network element (i.e., the cell identity of the MBSR obtained through step 500 above), and once the MBSR changes the cell identity, the cell identity of the MBSR stored in the LMF network element is invalid, thereby resulting in inaccurate cell location information obtained through the procedures from step 504A to step 504D based on the cell identity of the MBSR stored in the LMF network element. Illustratively, in step 500, the Cell identity of the MBSR is Cell id#1, and during movement, the MBSR changes Cell identity from Cell id#1 to Cell id#2. At this time, if the UE performs the positioning measurement using the Cell signal of the MBSR, the UE carries positioning measurement data in the uplink positioning message, where the Cell identifier included in the positioning measurement data is Cell id#2, so that after receiving Cell id#2, the LMF cannot determine whether the Cell corresponding to Cell id#2 is mobile. Since the LMF only holds that the Cell corresponding to the Cell id#1 has mobility, the LMF will not initiate the flow of steps 504A to 504D at this time. Since the LMF does not acquire the cell location information of the MBSR, the LMF only calculates the UE location information according to the location measurement data carried in the uplink location message, which is inaccurate. It can be seen that the main reasons for poor UE positioning results are: the cell identity of the current MBSR changes and the network does not know its latest cell identity.

Based on the above-mentioned problems, the embodiments of the present application provide a method for updating a cell identifier, when a network learns that a certain cell is a mobile cell, the network can trigger subscribing to a cell identifier update event corresponding to the cell, so as to learn in time the latest cell identifier broadcasted by the MBSR. The network element performing the subscription procedure may be an LMF network element or an AMF network element, which is not limited in this embodiment of the present application. In addition, in the F1 setup (F1 setup) procedure, the MBSR may send an MBSR identifier to a host base station serving the MBSR, where the host base station sends information of the MBSR cell (including the MBSR identifier, the cell identifier, and the mobility indication) to a network storage function NRF network element of the core network, and when the information of the MBSR cell changes, the information stored by the NRF is updated accordingly, so as to ensure that the cell identifier of a certain MBSR acquired by the network is up to date. In summary, any of the above schemes can ensure that the network can timely obtain the latest cell identifier broadcasted by the MBSR, so as to improve the positioning effect on the UE accessing the MBSR.

Fig. 6 is a schematic diagram of a method for updating a cell identifier according to an embodiment of the present application. The method can be applied to a communication system including a first device, a second device and a third device, where fig. 6 illustrates an embodiment in which the first device is an LMF network element, the second device is a mobility backhaul integrated node (mobile IAB) or a mobile base station relay msr node (hereinafter described as msr), and the third device is an AMF. As shown in fig. 6, the method includes:

Step 601. The lmf network element sends a first message to the AMF network element, where the first message is used to subscribe to an update event of a cell identifier corresponding to the MBSR.

Specifically, when knowing that the MBSR has mobility, the LMF network element sends a first message to the AMF network element. Illustratively, the MBSR sends a mobility indication to an access network device serving the MBSR, through which the LMF network element knows that the MBSR has mobility.

Optionally, the first message carries an identifier of the MBSR and a subscription event, where the subscription event is used to subscribe to an update of a cell identifier corresponding to the MBSR.

As one implementation, the first message may be the serviceaction namf_eventExposure_subscnube.

The amf network element sends a first message to the MBSR, step 602.

Optionally, the first message includes an identification of the MBSR.

Step 603. The mbsr sends a second message to the AMF network element, where the second message is used to notify the updated cell identifier corresponding to the second device.

Specifically, when the cell identifier corresponding to the MBSR changes, the MBSR sends a second message to the AMF network element. Optionally, the second message includes a cell identifier corresponding to the MBSR. Optionally, the second message further comprises an identification of the MBSR.

As an alternative embodiment, the MBSR moves within the coverage of the same access network device, and the MBSR broadcasts its new cell identity, at which point the MBSR may send a second message to the AMF network element.

As an alternative embodiment, the MBSR moves from the access network device 1 to the access network device 2, which broadcasts its new cell identity, at which point the MBSR may send a second message to the AMF network element. Wherein the new cell identity may be a cell identity assigned by the access network device 2 for MBSR.

The amf network element sends a second message to the LMF network element, step 604.

As an optional embodiment, after receiving the second message, the LMF network element updates the cell identifier corresponding to the MBSR locally.

In this embodiment, the access network device may be a home base station.

According to the method for updating the cell identifier shown in the embodiment, when the LMF network element knows that the cell corresponding to the MBSR has mobility, the LMF network element can initiate a subscription flow so as to timely acquire the latest cell identifier broadcasted by the MBSR. Thus, the LMF network element acquires current position information of the MBSR based on the latest cell identifier broadcast by the MBSR, and determines the position information of the UE according to the positioning measurement data reported by the UE connected with the network through the MBSR and the acquired current position information of the MBSR. Since the LMF timely acquires the latest cell identification of the MBSR broadcast, the cell identification of the MBSR in the positioning measurement data and the cell identification of the MBSR locally stored in the LMF network element can be kept consistent, and the positioning precision of the UE can be improved.

Based on the technical solution shown in fig. 6, a detailed description of a method for updating a cell identifier is provided below in connection with a specific embodiment. Fig. 7 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application. As shown in fig. 7, the method for updating a cell identifier of the present embodiment includes:

step 701.Mbsr DU completes the F1 setup procedure with the host base station 1.

The MBSR connects to the network through the hosting base station 1. The F1 setup procedure is an existing procedure, and reference may be made to the prior art.

Step 702. The lmf network element sends to the host base station 1 a NRPPa TRP information request for requesting the host base station 1 to provide detailed information (e.g. geographical coordinates of TRP) of the TRP of the host base station 1.

Step 703. The host base station 1 transmits an F1 TRP information request to the MBSR DU.

The mbsr DU transmits an F1 TRP information response to the host base station 1. F1 The TRP information response includes an identification of the MBSR MT (e.g., general public user identity (Generic Public Subscription Identifier, GPSI)), a cell identification of the MBSR (e.g., next generation global cell identity (Next generation Cell Global Identifier, NR CGI)), and a mobility indication (mobile indication) for informing the MBSR of mobility capabilities.

Step 705. The host base station 1 sends an NRPPa TRP information response to the LMF network element. The NRPPa TRP information response includes an identification of the MBSR MT, a cell identification of the MBSR, and a mobility indication. Up to this point, the LMF network element may learn that the MBSR has mobility (or that the cell to which the MBSR corresponds has mobility).

It is understood that the NRPPa TRP information response comprises TRP information of the host base station 1, the TRP information comprising detailed information of one or more child nodes (e.g. one or more MBSRs) of the host base station 1.

Step 706.Lmf network element stores locally the correspondence of the MBSR MT identity, cell identity and mobility indication.

Step 707. The lmf network element queries the unified data management (Unified Data Management, UDM) network element for the identity of the AMF network element corresponding to the MBSR MT.

Specifically, the LMF network element invokes a service operation nudm_uecm_get Request of the UDM network element, where the service operation carries an identifier of the MBSR MT, and the UDM network element determines, according to the identifier of the MBSR MT, the identifier of the AMF network element corresponding to the MBSR MT.

Step 708. The lmf network element sends a subscription request to an AMF network element (AMF network element corresponding to the MBSR), where the subscription request is used to subscribe to an update event of a cell identifier corresponding to the MBSR.

In this embodiment, the subscription request may correspond to the first message of the embodiment shown in fig. 6. The subscription request includes an identification of the MBSR MT.

The amf network element sends a subscription request to the MBSR MT.

As another implementation manner, the AMF network element may send a downlink NAS message to the MBSR MT, where the downlink NAS message carries a subscription event, where the subscription event is used to subscribe to an update of a cell identifier corresponding to the MBSR.

The MBSR MT forwards the subscription request to the MBSR DU.

Step 711.Mbsr moves from the hosting base station 1 to the hosting base station 2.

Step 712. The MBSR DU and the host base station 2 complete the F1 establishment procedure, and the host base station 2 allocates a new cell identity to the MBSR DU.

In step 713, the MBSR DU sends a subscription notification to the MBSR MT, where the subscription notification is used to notify the updated cell identifier corresponding to the MBSR.

In this embodiment, the subscription notification may correspond to the second message of the embodiment shown in fig. 6. Optionally, the subscription notification includes a cell identifier corresponding to the updated MBSR. Optionally, the subscription notification may also include an identification of the MBSR MT.

The mbsr MT sends a subscription notification to the AMF network element, step 714.

Step 715. The amf network element sends a subscription notification to the LMF network element.

Step 716.Lmf network element updates locally the correspondence of the MBSR MT identity, cell identity and mobility indication.

The amf network element triggers a positioning procedure for the UE, step 717.

Step 718. The ue reports positioning measurement data to the LMF network element, where the positioning measurement data includes a cell identifier corresponding to the new MBSR, which may refer to the prior art.

Step 719. The LMF network element obtains the position information of the MBSR cell according to the cell identifier corresponding to the new MBSR in the positioning measurement data of the UE, for positioning the UE.

According to the method for updating the cell identifier shown in the embodiment, when the LMF network element knows that the cell corresponding to the MBSR has mobility, the LMF network element can initiate a subscription flow so as to timely acquire the latest cell identifier broadcasted by the MBSR. The LMF network element acquires current position information of the MBSR based on the latest cell identifier broadcasted by the MBSR, and determines the position information of the UE according to the positioning measurement data reported by the UE connected with the network through the MBSR and the acquired current position information of the MBSR, so that the positioning result is more accurate.

Fig. 8 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application. The method can be applied to a communication system including a first device, a second device and a third device, where fig. 8 illustrates a scheme by taking the first device as an AMF network element, the second device as a mobility backhaul integrated node (mobile IAB) or a mobile base station relay MBSR node (hereinafter described as MBSR), and the third device as an access network device. As shown in fig. 8, the method includes:

step 801, the amf network element sends a first message to the access network device, where the first message is used to subscribe to an update event of a cell identifier corresponding to the MBSR.

Specifically, when the AMF network element knows that the MBSR has mobility, the AMF network element sends a first message to the access network device. Illustratively, in the registration procedure, the MBSR indicates to the access network device serving the MBSR that it has mobility, and the AMF network element learns that the MBSR has mobility through the access network device.

Optionally, the first message includes an identification of the MBSR.

Step 802, the access network device sends a second message to the AMF network element, where the second message is used to notify the updated cell identifier corresponding to the second device.

Specifically, when the access network equipment knows that the cell identifier corresponding to the MBSR changes, the access network equipment sends a second message to the AMF network element. Illustratively, the access network device receives the cell identifier broadcasted by the MBSR, and knows that the cell identifier corresponding to the MBSR changes. Optionally, the second message includes a cell identifier corresponding to the MBSR. Optionally, the second message further comprises an identification of the MBSR.

As an optional embodiment, the MBSR moves within the coverage area of the same access network device, the MBSR broadcasts its new cell identifier, the access network device receives the cell identifier broadcasted by the MBSR, and knows that the cell identifier corresponding to the MBSR changes, and the access network device sends a second message to the AMF network element to notify the updated cell identifier corresponding to the MBSR.

As an alternative embodiment, the MBSR moves from the access network device 1 to the access network device 2, which broadcasts its new cell identity, which may be the cell identity allocated by the access network device 2 for the MBSR. And the access network equipment 2 sends a second message to the AMF network element to inform the updated cell identification corresponding to the MBSR. In this embodiment, the MBSR moves from the access network device 1 to the access network device 2, and the access network device 1 needs to send a first message to the access network device 2, so that the access network device 2 knows that the AMF network element subscribes to an update event of the cell identifier corresponding to the MBSR.

In this embodiment, the access network device may be a home base station.

According to the method for updating the cell identifier shown in the embodiment, when the AMF network element knows that the cell corresponding to the MBSR has mobility, the AMF network element can initiate a subscription flow so as to timely acquire the latest cell identifier broadcasted by the MBSR. Thus, the LMF network element can acquire the latest cell identification broadcasted by the MBSR from the AMF network element, thereby acquiring the current position information of the MBSR. The LMF network element determines the position information of the UE according to the position measurement data reported by the UE connected with the network through the MBSR and the acquired current position information of the MBSR, and the LMF timely acquires the latest cell identification broadcasted by the MBSR, so that the cell identification of the MBSR in the position measurement data and the cell identification of the MBSR locally stored by the LMF network element can be kept consistent, and the positioning precision of the UE can be improved.

Based on the technical solution shown in fig. 8, a detailed description of a method for updating a cell identifier is provided below in connection with a specific embodiment.

Fig. 9 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application. As shown in fig. 9, the method for updating a cell identifier of the present embodiment includes:

step 901.MBSR initiates a registration procedure with the hosting base station 1, registering with MBSR-AMF.

In this embodiment, the MBSR MT initiates a registration procedure through the home base station, and sends a registration request message to the network. Specifically, in the RRC message, the MBSR MT indicates to the home base station 1 that the MBSR has mobility capability, the home base station 1 selects an AMF network element (i.e., MBSR-AMF, AMF serving MBSR), and indicates to the AMF network element that the MBSR has mobility capability in the N2 message. To this end, the MBSR registers with the MBSR-AMF.

In step 902, the MBSR-AMF sends a subscription request to the hosting base station 1, where the subscription request is used to subscribe to an update event of the cell identifier corresponding to the MBSR.

In this embodiment, the MBSR-AMF knows that the MBSR has mobility, and the MBSR-AMF sends a subscription request to the host base station 1, where the subscription request may correspond to the first message in the embodiment shown in fig. 8. The subscription request includes an identification of the MBSR MT.

Step 903. The mbsr DU completes the F1 setup procedure with the host base station 1.

In this embodiment, the F1 establishment procedure may refer to the prior art, in which the cell supported by the MBSR DU is activated, and the cell identity (for example, NR CGI 1) broadcasted by the MBSR may be reported to the host base station 1 by the MBSR DU.

Step 904, the host base station 1 sends a subscription notification to the MBSR-AMF, where the subscription notification is used to notify the cell identifier corresponding to the MBSR.

In this embodiment, the subscription notification may correspond to the second message of the embodiment shown in fig. 8. The subscription notification includes the cell identity (e.g., NR CGI 1) to which the MBSR corresponds.

Optionally, in some embodiments, before performing step 902, further comprising:

step 901a. MBSR-AMF sends a request message to the hosting base station 1, the request message being used to request the cell identity corresponding to MBSR.

For example, when the MBSR-AMF knows that the MBSR has mobility, the MBSR-AMF sends a location Reporting control (Location Reporting Control) message to the host base station 1, where the message includes a Reporting Type, where the Reporting Type is used to instruct the host base station 1 to report the cell identifier corresponding to the MBSR-AMF.

Step 901b. Mbsr DU completes the F1 setup procedure with the host base station 1.

Step 901℃ The host base station 1 returns a response message to the MBSR-AMF, where the response message includes the cell identifier corresponding to the MBSR. Illustratively, the host base station 1 returns a Location Report message to the MBSR-AMF, where the message includes the cell identifier corresponding to the MBSR.

Step 905.MBSR-AMF locally stores the correspondence between the identity of MBSR MT and the cell identity corresponding to MBSR.

Step 906.MBSR moves within the coverage area of the host base station 1, and the cell identity broadcast by the MBSR DU changes. At this time, the MBSR DU transmits a cell identity corresponding to the new MBSR to the host base station 1.

Step 907. The host base station 1 sends a subscription notification to the MBSR-AMF.

Optionally, the subscription notification includes the corresponding cell identity of the MBSR (e.g., NR CGI 2).

Step 908.MBSR-AMF updates locally the correspondence between the identity of MBSR MT and the corresponding cell identity of MBSR.

Step 909.Mbsr moves from the hosting base station 1 to the hosting base station 2, the cell identity broadcast by the mbsr DU changes.

Step 910, the host base station 1 sends subscription information to the host base station 2, where the subscription information is used to inform the host base station 2 that the MBSR-AMF subscribes to the update event of the cell identifier corresponding to the MBSR.

Step 911. The host base station 2 sends a subscription notification to the MBSR-AMF.

Optionally, the subscription notification includes the corresponding cell identity of the MBSR (e.g., NR CGI 3).

Step 912.MBSR-AMF locally updates the correspondence between the MBSR MT identity and the MBSR corresponding cell identity.

According to the method for updating the cell identifier shown in the embodiment, when the AMF network element knows that the cell corresponding to the MBSR has mobility, the AMF network element can initiate a subscription flow so as to timely know the latest cell identifier broadcasted by the MBSR, and thus when other network elements, such as the LMF network element, know that the cell corresponding to the MBSR has mobility, the AMF network element can acquire the latest cell identifier broadcasted by the MBSR.

Further, the LMF network element acquires current position information of the MBSR based on the latest cell identifier broadcasted by the MBSR, and determines the position information of the UE according to the positioning measurement data reported by the UE connected with the network through the MBSR and the acquired current position information of the MBSR, so that the positioning result is more accurate.

Fig. 10 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application. The method can be applied to a communication system comprising an access network device, a second device and a core network device, wherein the second device is a mobility backhaul integrated node (mobile IAB) or a mobile base station relay MBSR node (hereinafter described as MBSR), and the core network device comprises an AMF network element, an NRF network element and an LMF network element. As shown in fig. 10, the method includes:

Step 1001.MBSR sends a third message to the access network device 1, the third message comprising an identification of the MBSR (e.g. GPSI of the MBSR MT).

Optionally, the third message may further include a TAC supported by the cell of the MBSR. Optionally, the third message may further include an NR CGI supported by the cell of the MBSR.

Optionally, the third message includes an F1 setup request message.

Step 1002. The access network device 1 sends a fourth message to the AMF network element, where the fourth message includes an identifier of the MBSR and a cell identifier corresponding to the MBSR (e.g. GPSI and NR CGI 1).

Alternatively, the cell identifier corresponding to the MBSR in the fourth message may be a cell identifier allocated by the access network device for the MBSR. Optionally, the AMF network element locally stores the identifier of the MBSR and the cell identifier corresponding to the MBSR. Optionally, the fourth message comprises an NG configuration update message.

Step 1003. The amf network element sends a seventh message to the NRF network element, the seventh message comprising an identification of the MBSR and a cell identification (e.g. GPSI and NR CGI 1) corresponding to the MBSR.

Optionally, the seventh message includes a network element update message (e.g., nnrf_nfmanagement_nfupdate).

Step 1004.Nrf network element stores the identity of MBSR and the cell identity corresponding to MBSR.

Based on steps 1001 to 1004 (F1 setup procedure), the access network device 1 may send the MBSR information (including the identification of the MBSR and the cell identification corresponding to the MBSR) to the NRF network element for storage.

Alternatively, when the MBSR moves from the access network device 1 to the access network device 2, the MBSR may perform step 1005.

The mbsr sends a fifth message to the access network device 1, the fifth message indicating that the F1 link is released. Optionally, the fifth message includes an identification of the MBSR (e.g., GPSI of the MBSR MT).

Step 1006, the access network device 1 sends a sixth message to the AMF network element, where the sixth message is used to instruct the AMF network element to delete the identifier of the MBSR and the cell identifier corresponding to the MBSR.

Optionally, the sixth message comprises an NG configuration update message. Optionally, the sixth message includes an identification of the MBSR and a cell identification (e.g., GPSI and NR CGI 1) to which the MBSR corresponds.

Step 1007. The amf network element sends an eighth message to the NRF network element, where the eighth message is used to instruct the NRF network element to delete the MBSR identifier and the cell identifier corresponding to the MBSR.

Optionally, the eighth message comprises a network element update message. Optionally, the eighth message includes an identification of the MBSR and a cell identification (e.g., GPSI and NR CGI 1) to which the MBSR corresponds.

Step 1008.Nrf network element deletes the MBSR identity and the cell identity corresponding to the MBSR.

It should be understood that, when the MBSR moves from the access network device 1 to the access network device 2, the access network device 2 may send the latest information of the MBSR to the NRF network element for update storage based on the same F1 setup procedure, so as to ensure that the NRF network element stores the cell identifier corresponding to the latest MBSR.

Optionally, when the AMF network element triggers a positioning procedure for the UE, the UE reports positioning measurement data to the network (e.g., LMF network element), where the positioning measurement data includes a cell identifier corresponding to an MBSR serving the UE. In this regard, the LMF network element may perform step 1009.

Step 1009.Lmf network element sends a query request to NRF network element, the query request being for querying an identity of an MBSR associated with a cell identity corresponding to the MBSR. The query request includes a cell identity corresponding to the MBSR.

Step 1010.Nrf network element sends a query response to LMF network element, the query response comprising an identification of an MBSR associated with a cell identification corresponding to the MBSR.

The MBSR moves to the access network device 2, and in the F1 establishment procedure, the access network device 2 allocates the MBSR with the latest cell identifier, and stores the latest cell identifier to the NRF network element, so as to ensure that the core network, for example, the LMF network element, acquires the latest cell identifier of the MBSR, where the latest cell identifier can be consistent with the cell identifier corresponding to the MBSR in the positioning measurement data reported by the UE. The LMF network element acquires the MBSR identification associated with the cell identification from the NRF network element based on the latest cell identification of the MBSR, further acquires the position information of the MBSR, and then determines the position information of the UE according to the position information of the MBSR and the positioning measurement data reported by the UE, so that the positioning result is more accurate.

Based on the technical solution shown in fig. 10, a detailed description of a method for updating a cell identifier is provided below in connection with a specific embodiment. Fig. 11 is a schematic diagram of another method for updating cell identity according to an embodiment of the present application. As shown in fig. 11, the method for updating a cell identifier of the present embodiment includes:

the mbsr DU sends an F1 setup request to the hosting base station 1.

Optionally, the F1 setup request includes an identification of the MBSR MT (e.g., GPSI). Optionally, the F1 setup request may further include a cell-supported TAC of the MBSR DU. Optionally, the F1 setup request may also include a cell-supported NR CGI of the MBSR DU.

Step 1102. The host base station 1 allocates a cell identity (e.g. NR CGI 1) to the MBSR DU. (optional)

If the F1 establishment request in step 1101 does not carry the NR GCI of the MBSR DU, the host base station 1 may allocate an NR CGI to the MBSR DU.

Optionally, after step 1102, the following steps are performed:

step 1102A. The host base station 1 sends an NG configuration update (NG configuration update) message to the AMF1, where the NR configuration update message is used to trigger the network side to store MBSR information (MBSR profile), where the MBSR information includes a correspondence between a cell identifier corresponding to the MBSR and an identifier of the MBSR MT (e.g., the MBSR information includes NR CGI1 and GPSI).

In some embodiments, the MBSR profile may also be referred to as mobile IAB profile.

Optionally, the MBSR information may further include other information related to the MBSR cell, such as TAC, which is not limited in this embodiment.

Step 1102b.amf1 network element sends a network element update message to the NRF network element, the network element update message comprising MBSR information.

Alternatively, as another implementation, the AMF1 network element may also send the MBSR information to other network elements, such as UDM or universal data management (Unified Data Management, UDR) network elements.

Step 1102c. nrf network element locally stores the correspondence between the cell identifier corresponding to the MBSR and the identifier of the MBSR MT.

Step 1103. The host base station 1 sends an F1 setup response to the MBSR DU.

Optionally, the F1 setup response includes a cell identity (e.g., NR CGI 1) corresponding to the MBSR.

Step 1104.Mbsr moves from home base station 1 to home base station 2.

Step 1105. Release F1 link between mbsr DU and host base station 1. Specifically, the MBSR DU transmits an F1 release request message to the hosting base station 1.

Step 1106A. The host base station 1 sends an NG configuration update message to the AMF1 network element, where the configuration update message is used to trigger the network side (e.g., AMF1 network element) to delete the MBSR information.

Wherein the MBSR information includes a correspondence between a cell identity corresponding to the MBSR and an identity of the MBSR MT (e.g., the MBSR information includes NR CGI1 and GPSI).

Step 1106b. The amf1 network element sends a network element update message to the NRF network element, the network element update message being used to trigger the NRF network element to delete the MBSR information.

Step 1106c. Nrf network element deletes locally stored MBSR information (e.g. deletes NR CGI1 and GPSI of MBSR).

Step 1107.Mbsr DU sends an F1 setup request to the hosting base station 2.

Optionally, the F1 setup request includes an identification of the MBSR MT. Optionally, the F1 setup request may further include a cell-supported TAC of the MBSR DU. Optionally, the F1 setup request may also include a cell-supported NR CGI of the MBSR DU.

Step 1108. The host base station 2 allocates a cell identity (e.g. NR CGI 2) to the MBSR DU. (optional)

If the F1 establishment request in step 1107 does not carry the NR GCI of the MBSR DU, the host base station 2 may allocate an NR CGI for the MBSR DU.

Steps 1108A to 1108C, similar to steps 1102A to 1102C, may implement, for example, that the AMF2 network element triggers the NRF network element to locally store MBSR information, where the MBSR information includes a correspondence between a cell identifier corresponding to the MBSR and an identifier of the MBSR MT (e.g., the MBSR information includes NR CGI2 and GPSI).

It should be noted that, the AMF1 network element and the AMF2 network element may be the same AMF network element or different AMF network elements, which is not limited in this embodiment.

Step 1109. The host base station 2 transmits an F1 setup response to the MBSR DU.

Optionally, the F1 setup response includes a cell identity (e.g., NR CGI 2) corresponding to the MBSR.

Step 1110. The amf2 network element triggers a positioning procedure for the UE.

In this embodiment, the UE accesses the network through the cell of the MBSR, and at a certain moment, the AMF2 network element triggers the positioning procedure of the UR.

Step 1111. The ue reports positioning measurement data to the LMF network element, where the positioning measurement data includes a cell identifier (e.g. NR CGI 2) corresponding to the MBSR, which may refer to the prior art.

Step 1112. The lmf network element sends a query request to the NRF network element, the query request being for querying an identity of the MBSR associated with the cell identity corresponding to the MBSR.

Optionally, the query request includes a cell identity (e.g., NR CGI 2) corresponding to the MBSR.

Step 1113. The nrf network element sends a query response to the LMF network element, the query response including an identification of the MBSR MT associated with the cell identification corresponding to the MBSR (e.g., NG CGI2 associated GPSI).

Step 1114.Lmf network element obtains location information of the MBSR MT and determines location information of the UE according to the location information of the MBSR MT and the positioning measurement data.

In the method for updating the cell identifier shown in the embodiment, in the F1 establishment procedure, the MBSR sends the identifier of the MBSR MT to the host base station, so that the host base station may send the MBSR information including the identifier of the MBSR MT and the cell identifier corresponding to the MBSR to the NRF network element of the core network for storage, thereby ensuring that the core network obtains the cell identifier of the MBSR. In this way, when other network elements, such as an LMF network element, learn that the cell corresponding to the MBSR has mobility, the latest cell identity of the MBSR broadcast can be obtained from the NRF network element.

In this embodiment of the present application, other network elements, for example, an SMF network element or an AMF network element, may also obtain, through an NRF network element request, an MBSR identifier associated with a cell identifier corresponding to an MBSR.

The method for updating the cell identity according to the embodiment of the present application is described above with reference to fig. 6 to 11, and the communication device for a wireless backhaul network according to the embodiment of the present application is described below with reference to fig. 12 and 13.

Fig. 12 is a schematic structural diagram of a communication device for a wireless backhaul network according to an embodiment of the present application. As shown in fig. 12, the apparatus 1200 may be an LMF network element; alternatively, the apparatus 1200 may be a second device (i.e., a mobile access backhaul integration node or a mobile base station relay node); alternatively, the apparatus 1200 may be an AMF network element; alternatively, the apparatus 1200 may be an access network device (e.g., a home base station); alternatively, the apparatus 1200 may be an NRF network element. The apparatus 1200 includes: a transmitting unit 1201 and a receiving unit 1202.

In a possible implementation manner of the apparatus 1200 being an LMF network element, the sending unit 1201 is configured to send a first message when knowing that the second device has mobility, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; a receiving unit 1202, configured to receive a second message when the cell identifier corresponding to the second device changes, where the second message is used to notify the updated cell identifier corresponding to the second device. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In a possible implementation manner, the sending unit 1201 is configured to send a first message to the third device, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; the receiving unit 1202 is configured to receive the second message through the third device. The third device is an access and mobility management function AMF network element.

In one possible implementation, the first message includes an identification of the second device.

In a possible implementation manner, the second message includes an updated cell identifier corresponding to the second device.

In one possible implementation manner of the apparatus 1200 being the second device (i.e. the mobile access backhaul integrated node or the mobile base station relay node), the receiving unit 1202 is configured to receive a first message, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; and the sending unit 1201 is configured to send a second message when the cell identifier corresponding to the second device changes, where the second message is used to notify the updated cell identifier corresponding to the second device.

In a possible implementation manner, the receiving unit 1202 is configured to receive, by the third device, the first message from the first device; the sending unit 1201 is configured to send, by the third device, the second message to the first device. The first device is a Location Management Function (LMF) network element, and the third device is an access and mobility management function (AMF) network element.

In a possible implementation manner of the apparatus 1200 being an AMF network element, the sending unit 1201 is configured to send a first message when knowing that the second device has mobility, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; a receiving unit 1202, configured to receive a second message when the cell identifier corresponding to the second device changes, where the second message is used to notify the updated cell identifier corresponding to the second device. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In a possible implementation manner, the sending unit 1201 is configured to send a first message to the third device, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; the receiving unit 1202 is configured to receive the second message through the third device. The third device is an access network device.

In a possible implementation manner of the apparatus 1200 being an access network device, the receiving unit 1202 is configured to receive a first message, where the first message is used to subscribe to an update event of a cell identifier corresponding to the second device; and the sending unit 1201 is configured to send a second message when it is known that the cell identifier corresponding to the second device changes, where the second message is used to notify the updated cell identifier corresponding to the second device. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In a possible implementation manner, the receiving unit 1202 is configured to receive the first message from the first device; the sending unit 1201 is configured to send the second message to the first device. The first device is an access and mobility management function AMF network element.

In another possible implementation of the apparatus 1200 being an access network device, the receiving unit 1202 is configured to receive a third message from the second device, where the third message includes an identification of the second device; a sending unit 1201 is configured to send a fourth message to an AMF network element, where the fourth message includes an identifier of the second device and a cell identifier corresponding to the second device. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In one possible implementation, the third message includes an F1 setup request (F1 step request) message.

In a possible implementation manner, the cell identifier corresponding to the second device in the fourth message is a cell identifier allocated by the access network device to the second device.

In a possible implementation manner, the receiving unit 1202 is further configured to receive a fifth message from the second device, where the fifth message is used to indicate that the F1 link is released; the sending unit 1201 is further configured to send a sixth message to the AMF network element, where the sixth message is used to instruct the AMF network element to delete the identifier of the second device and the cell identifier corresponding to the second device.

In one possible implementation, the fourth message or the sixth message sent by the sending unit 1201 to the AMF network element includes an NG configuration update (NG configuration update) message.

In another possible implementation manner of the apparatus 1200 is an AMF network element, the receiving unit 1202 is configured to receive a fourth message from the access network device, where the fourth message includes an identifier of the second device and a cell identifier corresponding to the second device; the sending unit 1201 is configured to send a seventh message to an NRF network element, where the seventh message includes an identifier of the second device and a cell identifier corresponding to the second device. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In a possible implementation manner, the receiving unit 1202 is further configured to receive a sixth message from the access network device, where the sixth message is used to instruct the AMF network element to delete the identifier of the second device and the cell identifier corresponding to the second device; the sending unit 1201 is further configured to send an eighth message to the NRF network element, where the eighth message is used to instruct the NRF network element to delete the identifier of the second device and the cell identifier corresponding to the second device.

In one possible implementation, the receiving unit 1202 receives a fourth message or a sixth message from the access network device including an NG configuration update message.

In one possible implementation, the seventh message or the eighth message sent by the sending unit 1201 to the NRF network element includes a network element update message.

In another possible implementation of the apparatus 1200 being the second device (i.e. the mobile access backhaul integrated node or the mobile base station relay node), the sending unit 1201 is configured to send a third message to the access network device, where the third message includes an identification of the second device.

In a possible implementation manner, the sending unit 1201 is further configured to send a fifth message to the access network device, where the fifth message is used to indicate that the F1 link is released.

In another possible implementation manner of the apparatus 1200 being an NRF network element, the receiving unit 1202 is configured to receive a seventh message from the AMF network element, where the seventh message includes an identifier of the second device and a cell identifier corresponding to the second device; and the storage unit is used for storing the identification of the second equipment and the cell identification corresponding to the second equipment. The second equipment is a mobile access backhaul integrated node or a mobile base station relay node.

In a possible implementation manner, the receiving unit 1202 is further configured to receive an eighth message from the AMF network element, where the eighth message is configured to instruct the NRF network element to delete the identifier of the second device and a cell identifier corresponding to the second device; the storage unit is further configured to delete an identifier of the second device and a cell identifier corresponding to the second device.

In a possible implementation manner, the receiving unit 1202 receives a seventh message or an eighth message from the AMF network element, including a network element update message.

In a possible implementation manner, the receiving unit 1202 is further configured to receive a query request from the LMF network element, where the query request is used to query an identifier of the second device associated with a cell identifier corresponding to the second device; the apparatus further comprises: a sending unit 1201, configured to send a query response to the LMF network element, where the query response includes an identifier of the second device associated with a cell identifier corresponding to the second device.

In another possible implementation manner of the apparatus 1200 being an LMF network element, the receiving unit 1202 is configured to receive positioning measurement data from a terminal device, where the terminal device accesses a network through the second device, and the positioning measurement data includes a cell identifier corresponding to the second device; the second equipment is a mobile access backhaul integrated node or a mobile base station relay node. A sending unit 1201, configured to send a query request to the NRF network element, where the query request is used to query an identifier of the second device associated with a cell identifier corresponding to the second device; the receiving unit 1202 is further configured to receive a query response from the NRF network element, where the query response includes an identity of the second device associated with a cell identity corresponding to the second device.

It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and for brevity, will not be described herein again.

It should be appreciated that the apparatus 1200 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 1200 may be an LMF network element in the foregoing embodiment, and the apparatus 1200 may be configured to perform various procedures and/or steps corresponding to the LMF network element in the foregoing method embodiment; alternatively, the apparatus 1200 may be an MBSR node in the foregoing embodiment, and the apparatus 1200 may be configured to perform each flow and/or step corresponding to the MBSR node in the foregoing method embodiment; alternatively, the apparatus 1200 may be an AMF network element in the foregoing embodiment, and the apparatus 1200 may be configured to perform each flow and/or step corresponding to the AMF network element in the foregoing method embodiment; alternatively, the apparatus 1200 may be a host base station in the above embodiment, and the apparatus 1200 may be configured to perform each flow and/or step corresponding to the host base station in the above method embodiment; alternatively, the apparatus 1200 may be an NRF network element in the foregoing embodiment, and the apparatus 1200 may be configured to execute each flow and/or step corresponding to the NRF network element in the foregoing method embodiment, so that repetition is avoided, and details are not repeated herein.

The apparatus 1200 of each of the above embodiments has a function of implementing the corresponding steps in the above method; the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the transmitting unit may be replaced by a transmitter, the receiving unit may be replaced by a receiver, and other units, such as a processing unit, etc. may be replaced by a processor, to perform the transceiving operations and the associated processing operations in the various method embodiments, respectively.

In the embodiment of the present application, the apparatus in fig. 12 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit (including the receiving unit and the transmitting unit) may be a transceiver circuit of the chip, which is not limited herein.

Fig. 13 is a schematic structural diagram of another communication device for a wireless backhaul network according to an embodiment of the present application. It should be understood that the apparatus 1300 may be an LMF network element in the foregoing embodiment, and may be configured to perform each flow and/or step corresponding to the LMF network element in the foregoing method embodiment; alternatively, the apparatus 1300 may be an MBSR node in the above-described embodiment, and may be configured to perform each flow and/or step corresponding to the MBSR node in the above-described method embodiment; alternatively, the apparatus 1300 may be an AMF network element in the foregoing embodiment, and may be configured to perform each flow and/or step corresponding to the AMF network element in the foregoing method embodiment; alternatively, the apparatus 1300 may be a host base station in the above embodiment, and may be configured to perform each flow and/or step corresponding to the host base station in the above method embodiment; alternatively, the apparatus 1300 may be an NRF network element in the above embodiment, and may be configured to perform each flow and/or step corresponding to the NRF network element in the above method embodiment.

Apparatus 1300 includes a transceiver 1310, a memory 1320, and a processor 1330; the transceiver 1310, the memory 1320, and the processor 1330 communicate with each other through an internal connection path. The transceiver 1310 is configured to receive or transmit signals or data, the memory 1320 is configured to store program instructions or data, and the processor 1330 is configured to invoke the program instructions in the memory 1320 to implement the method in various possible implementations of the apparatus 1300.

Memory 1320 may optionally include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.

It should be appreciated that in embodiments of the present application, the processor 1310 of the apparatus 1300 described above may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The present application also provides a computer readable medium storing program code for computer execution, the program code comprising instructions for performing the method of each network element or device in any of the method embodiments described above.

The present application also provides a computer program product comprising computer program code embodied therein, which when run on a computer causes the computer to implement a method as in any of the above method embodiments for each network element or device.

In a twentieth aspect, the present application provides a chip comprising: the system comprises an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method of each network element or device in any method embodiment.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software elements in the processor for execution. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The method for updating the cell identifier is characterized by being applied to a communication system comprising a first device and a second device, wherein the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

when the first device knows that the second device has the mobility, the first device sends a first message, wherein the first message is used for subscribing an update event of a cell identifier corresponding to the second device;

when the cell identifier corresponding to the second device changes, the first device receives a second message, where the second message is used to notify the updated cell identifier corresponding to the second device.

2. The method of claim 1, wherein the communication system further comprises a third device, the first device transmitting a first message comprising:

The first device sends a first message to the third device, wherein the first message is used for subscribing to an update event of a cell identifier corresponding to the second device;

the first device receiving a second message comprising:

the first device receives the second message through the third device.

3. The method according to claim 2, wherein the first device is a location management function, LMF, network element and the third device is an access and mobility management function, AMF, network element; or alternatively

The first device is an AMF network element, and the third device is an access network device.

4. The method of claim 1, wherein the first message comprises an identification of the second device.

5. The method of claim 1, wherein the second message includes an updated cell identity corresponding to the second device.

6. The method for updating the cell identifier is characterized by being applied to a communication system comprising a second device, wherein the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

the second equipment receives a first message, wherein the first message is used for subscribing an updating event of a cell identifier corresponding to the second equipment;

When the cell identifier corresponding to the second device changes, the second device sends a second message, where the second message is used to notify the updated cell identifier corresponding to the second device.

7. The method of claim 6, wherein the communication system further comprises a first device and a third device, the second device receiving the first message, comprising:

the second device receives the first message from the first device through the third device;

the second device sending the second message, comprising:

the second device sends the second message to the first device through the third device.

8. The method of claim 7, wherein the first device is a location management function, LMF, network element and the third device is an access and mobility management function, AMF, network element.

9. The method of claim 6 or 7, wherein the first message comprises an identification of the second device.

10. The method according to claim 6 or 7, wherein the second message comprises an updated cell identity corresponding to the second device.

11. The method for updating the cell identifier is characterized by being applied to a communication system comprising second equipment and third equipment, wherein the second equipment is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

The third device receives a first message, wherein the first message is used for subscribing to an update event of a cell identifier corresponding to the second device;

and when the third device knows that the cell identifier corresponding to the second device is changed, the third device sends a second message, and the second message is used for notifying the updated cell identifier corresponding to the second device.

12. The method of claim 11, wherein the communication system further comprises a first device and wherein the third device receives the first message comprising:

the third device receiving the first message from the first device;

the third device sending a second message comprising:

the third device sends the second message to the first device.

13. The method of claim 11, wherein the first device is an access and mobility management function, AMF, network element and the third device is an access network device.

14. The method according to claim 11 or 12, wherein the first message comprises an identification of the second device.

15. The method according to claim 11 or 12, wherein the second message comprises an updated cell identity corresponding to the second device.

16. The method for updating the cell identifier is characterized by being applied to a communication system comprising access network equipment, second equipment and an AMF network element, wherein the second equipment is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

the access network device receives a third message from the second device, the third message including an identification of the second device;

and the access network equipment sends a fourth message to the AMF network element, wherein the fourth message comprises the identification of the second equipment and the cell identification corresponding to the second equipment.

17. The method of claim 16, wherein the third message comprises an F1 setup request (F1 step request) message.

18. The method according to claim 16 or 17, characterized in that the method further comprises:

the access network equipment receives a fifth message from the second equipment, wherein the fifth message is used for indicating the release of the F1 link;

and the access network equipment sends a sixth message to the AMF network element, wherein the sixth message is used for indicating the AMF network element to delete the identifier of the second equipment and the cell identifier corresponding to the second equipment.

19. The method according to any of claims 16 to 18, wherein the fourth or sixth message sent by the access network device to the AMF network element comprises a NG configuration update (NG configuration update) message.

20. The method for updating the cell identifier is characterized by being applied to a communication system comprising access network equipment and second equipment, wherein the second equipment is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

the second device sends a third message to the access network device, the third message including an identification of the second device.

21. The method of claim 20, wherein the third message comprises an F1 setup request (F1 step request) message.

22. The method of claim 20, wherein the method further comprises:

the second device sends a fifth message to the access network device, where the fifth message is used to instruct release of the F1 link.

23. The method for updating the cell identifier is characterized by being applied to a communication system comprising a second device, an access and mobility management function AMF network element and a network storage function NRF network element, wherein the second device is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

The NRF network element receives a seventh message from the AMF network element, wherein the seventh message comprises the identifier of the second equipment and the cell identifier corresponding to the second equipment;

the NRF network element stores the identification of the second device and the cell identification corresponding to the second device.

24. The method of claim 23, wherein the method further comprises:

the NRF network element receives an eighth message from the AMF network element, wherein the eighth message is used for indicating the NRF network element to delete the identifier of the second device and the cell identifier corresponding to the second device;

and the NRF network element deletes the identifier of the second device and the cell identifier corresponding to the second device.

25. The method according to claim 23 or 24, wherein the NRF network element receives a seventh message or an eighth message from the AMF network element comprising a network element update message.

26. A method as defined in claim 23, wherein the communication system further comprises a location management function, LMF, network element, the method further comprising:

the NRF network element receives a query request from the LMF network element, wherein the query request is used for querying the identifier of the second equipment associated with the cell identifier corresponding to the second equipment;

The NRF network element sends a query response to the LMF network element, the query response including an identity of the second device associated with a cell identity corresponding to the second device.

27. The method for updating the cell identifier is characterized by being applied to a communication system comprising second equipment, a network storage function NRF network element and a positioning management function LMF network element, wherein the second equipment is a mobile access backhaul integrated node or a mobile base station relay node, and the method comprises the following steps:

the LMF network element receives positioning measurement data from terminal equipment, the terminal equipment is accessed to a network through the second equipment, and the positioning measurement data comprises a cell identifier corresponding to the second equipment;

the LMF network element sends a query request to the NRF network element, wherein the query request is used for querying the identifier of the second equipment associated with the cell identifier corresponding to the second equipment;

the LMF network element receives a query response from the NRF network element, the query response including an identification of the second device associated with a cell identification corresponding to the second device.

28. A communication device comprising means or units for performing the method of any one of claims 1 to 5, or of any one of claims 6 to 10, or of any one of claims 11 to 15, or of any one of claims 16 to 19, or of any one of claims 20 to 22, or of any one of claims 23 to 26, or of claim 27.

29. A computer readable medium storing program code for computer execution, the program code comprising instructions for performing the method of any one of claims 1 to 5, or any one of claims 6 to 10, or any one of claims 11 to 15, or any one of claims 16 to 19, or any one of claims 20 to 22, or any one of claims 23 to 26, or claim 27.

30. A computer program product comprising computer program code which, when run on a computer, causes the computer to carry out the method of any one of claims 1 to 5, or of any one of claims 6 to 10, or of any one of claims 11 to 15, or of any one of claims 16 to 19, or of any one of claims 20 to 22, or of any one of claims 23 to 26, or of claim 27.