CN116567754A - Switching method, system, device, equipment and storage medium - Google Patents

Switching method, system, device, equipment and storage medium Download PDF

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Publication number
CN116567754A
CN116567754A CN202310827440.3A CN202310827440A CN116567754A CN 116567754 A CN116567754 A CN 116567754A CN 202310827440 A CN202310827440 A CN 202310827440A CN 116567754 A CN116567754 A CN 116567754A
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China
Prior art keywords
terminal
source
sent
target
receiving
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CN202310827440.3A
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Chinese (zh)
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CN116567754B (en
Inventor
陈鹏
黄璇
宗佳颖
刘洋
毕奇
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The present disclosure provides a handover method, a system, a device, and a storage medium, and relates to the field of communications, and in the case of receiving a terminal measurement report sent by a source DU, a terminal context establishment request message is sent to a target DU, a context modification request is sent to a CU-UP, and in the case of receiving a context modification response of the CU-UP, a terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration complete message sent by the terminal.

Description

Switching method, system, device, equipment and storage medium
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a handover method, system, apparatus, device, and storage medium.
Background
In order to solve the problem of shortage of spectrum resources, carrier frequency of a 6G wireless communication system is gradually increased, so that coverage range of each base station is further reduced, and deployment difficulty and cost of the base stations are further increased. In order to solve the above-mentioned problems, a related art proposes a non-terrestrial network networking architecture that enlarges the communication service range by using a satellite as an access node or a relay node.
However, due to the limited loading of satellites, how to deploy communication devices on satellites is a problem in the art that is highly desirable.
Disclosure of Invention
The present disclosure provides a handoff method, system, apparatus, device, and storage medium that overcomes, at least to some extent, the problem of how communication devices on current satellites are deployed.
Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.
According to an aspect of the present disclosure, there is provided a handover method applied to a CU-CP provided on a high-orbit satellite, including:
transmitting a terminal context establishment request message to a target DU under the condition that a terminal measurement report transmitted by a source DU is received, wherein the source DU and the target DU are both arranged on a low orbit satellite;
sending a context modification request to a CU-UP, wherein the CU-UP is arranged on a low-orbit satellite;
under the condition that a context modification response of the CU-UP is received, a terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, and the terminal is instructed to randomly access the target DU;
and receiving a reconfiguration completion message sent by the terminal.
In one embodiment of the present disclosure, the method further comprises:
a context release request is sent to the source DU to cause the source DU to complete the context release.
According to another aspect of the present disclosure, there is provided a handover method applied to a source DU provided on a low-orbit satellite, including:
receiving a terminal measurement report sent by a terminal;
transmitting a terminal measurement report to a CU-CP (CU-Console), so that the CU-CP transmits a terminal context establishment request message to a target DU and transmits a context modification request to a CU-UP, wherein the CU-CP is arranged on a high-orbit satellite, and the CU-UP is arranged on a low-orbit satellite;
receiving a terminal context modification message sent by the CU-CP under the condition that the CU-CP receives a context modification response sent by the CU-UP;
and stopping data transmission of the receiving terminal and indicating the terminal to randomly access a target DU which is arranged on the low orbit satellite under the condition that the terminal context modification message sent by the CU-CP is received.
In one embodiment of the present disclosure, the method further comprises:
receiving a context release request sent by the CU-CP under the condition that the CU-CP receives a reconfiguration completion message sent by the terminal;
context release is completed.
According to yet another aspect of the present disclosure, there is provided a switching system including: CU-CP, CU-UP, source DU and target DU, wherein CU-CP is arranged on the high orbit satellite, CU-UP, source DU and target DU are arranged on the low orbit satellite;
the source DU is used for receiving a terminal measurement report sent by the terminal and sending the terminal measurement report to the CU-CP, stopping data transmission of the receiving terminal under the condition of receiving a terminal context modification message sent by the CU-CP, and indicating the terminal to randomly access the target DU;
and the CU-CP is used for sending a terminal context establishment request message to the target DU under the condition that the terminal measurement report sent by the source DU is received, sending a context modification request to the CU-UP, and sending a terminal context modification message to the source DU under the condition that the context modification response of the CU-UP is received.
In one embodiment of the disclosure, the CU-CP is further configured to receive a reconfiguration complete message sent by the terminal, and send a context release request to the source DU;
the source DU is also used to complete the context release.
According to still another aspect of the present disclosure, there is provided a switching apparatus applied to a CU-CP provided on a high-orbit satellite, including:
a first sending module, configured to send a terminal context establishment request message to a target DU when receiving a terminal measurement report sent by a source DU, where the source DU and the target DU are both disposed on a low-orbit satellite;
the second sending module is used for sending a context modification request to the CU-UP, and the CU-UP is arranged on the low-orbit satellite;
a third sending module, configured to send a terminal context modification message to the source DU when receiving a context modification response of the CU-UP, so that the source DU stops receiving terminal data transmission, and instructs the terminal to randomly access the target DU;
and the first receiving module is used for receiving the reconfiguration completion message sent by the terminal.
In one embodiment of the present disclosure, the handover request includes an identification of a handover target and a handover method;
and a fifth sending module, configured to send a context release request to the source DU, so that the source DU completes the context release.
According to still another aspect of the present disclosure, there is provided a switching apparatus applied to a source DU provided on a low-orbit satellite, including:
the second receiving module is used for receiving a terminal measurement report sent by the terminal;
a fourth sending module, configured to send a terminal measurement report to a CU-CP, so that the CU-CP sends a terminal context setup request message to a target DU, and sends a context modification request to a CU-UP, where the CU-CP is disposed on a high orbit satellite and the CU-UP is disposed on a low orbit satellite;
a third receiving module, configured to receive a terminal context modification message sent by the CU-CP when the CU-CP receives a context modification response sent by the CU-UP;
and the indication module is used for stopping data transmission of the receiving terminal and indicating the terminal to randomly access a target DU which is arranged on the low-orbit satellite under the condition of receiving the terminal context modification message sent by the CU-CP.
In one embodiment of the present disclosure, the switching device further includes:
a fourth receiving module, configured to receive a context release request sent by the CU-CP when the CU-CP receives a reconfiguration complete message sent by the terminal;
and the release module is used for completing the context release.
According to still another aspect of the present disclosure, there is provided an electronic apparatus including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the handover method described above via execution of the executable instructions.
According to yet another aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described handover method.
According to the switching method provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 shows a switching system architecture diagram in an embodiment of the present disclosure.
Fig. 2 shows a flow chart of a handover method according to an embodiment of the disclosure.
Fig. 3 is a schematic flow chart of another handover method according to an embodiment of the disclosure.
Fig. 4 shows a flowchart of yet another handover method according to an embodiment of the disclosure.
Fig. 5 shows a flowchart of yet another handover method according to an embodiment of the disclosure.
Fig. 6 shows a schematic diagram of a switching device in an embodiment of the disclosure.
Fig. 7 shows a schematic diagram of another switching device in an embodiment of the disclosure.
Fig. 8 shows a block diagram of an electronic device in an embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
In order to solve the above problems, embodiments of the present disclosure provide a handover method, system, apparatus, device, and storage medium.
For ease of understanding, the disclosed embodiments will first be described with respect to a switching system.
Fig. 1 illustrates a switching system architecture diagram in an embodiment of the present disclosure.
As shown in fig. 1, the switching system may include:
CU-CP 102, CU-UP 104, source DU 106 and target DU 108, wherein CU-CP 102 is located on a high orbit satellite and CU-UP 104, source DU 106 and target DU 108 are located on a low orbit satellite;
a source DU 106, configured to receive a terminal measurement report sent by a terminal and send the terminal measurement report to the CU-CP 102, stop data transmission of the receiving terminal when receiving a terminal context modification message sent by the CU-CP 102, and instruct the terminal to randomly access to a target DU 108;
CU-CP 102, which is configured to send a terminal context setup request message to target DU 108 upon receiving the terminal measurement report sent by source DU 106, and send a context modification request to CU-UP 104, and send a terminal context modification message to source DU 106 upon receiving the context modification response of CU-UP 104.
In some embodiments, CU-CP 102 is a communication control plane, CU-UP 104 is a communication user plane, CU-CP 102 and CU-UP 104 are both centralized units, and DUs are distributed units. The CU-CP 102 and the CU-UP 104 can be a centralized unit split based on functional differences.
In some embodiments, only one CU-UP 104 may be provided per low-orbit satellite and only one CU-CP 102 may be provided per high-orbit satellite.
In some embodiments, multiple DUs may be provided on each low orbit satellite.
In some embodiments, the satellite nodes may cooperatively communicate with each other via a laser. Each DU may serve one or more terminals.
By way of example, the terminal may be a variety of electronic devices including, but not limited to, smartphones, tablets, laptop portable computers, desktop computers, wearable devices, augmented reality devices, virtual reality devices, and the like.
In some embodiments, CU-CP 102 may be logically coupled to CU-UP 104 via an E1 interface.
For example, one time division multiplexed frame of E1 (with a length t=125us, i.e. a sampling period of 125 microseconds) is divided into 32 equal time slots, with the numbers CH 0-CH 31. Wherein the time slot CH0 is used for frame synchronization, the time slot CH16 is used for signaling, and 30 time slots of CH 1-CH 15 and CH 17-CH 31 are used as 30 voice channels. Each slot transmits 8 bits and thus a total of 256 bits. 8000 frames are transmitted per second, so the data rate of PCM burst E1 is 2.048Mbit/s.
In some embodiments, logical connections may be made between CU-CP 102 and DUs through an F1-C interface.
In some embodiments, a logical connection is made between CU-UP 104 and DU through F1-U.
In some embodiments, the DU and the terminal are logically connected through a Uu interface.
In some embodiments, CU-CP 102 is further configured to receive a reconfiguration complete message sent by the terminal, and send a context release request to source DU 106;
in some embodiments, the source DU 106 is also used to complete the context release.
According to the switching system provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Fig. 2 is a schematic flow chart of a handover method according to an embodiment of the present disclosure, where it is to be noted that the handover method according to the embodiment of the present disclosure is applied to CU-CPs disposed on high-orbit satellites.
As shown in fig. 2, the handover method may include:
s210, a terminal context establishment request message is sent to a target DU when a terminal measurement report sent by a source DU is received, wherein the source DU and the target DU are both arranged on a low-orbit satellite.
In some embodiments, the source DU may send an uplink RRC message to the CU-CP, with the terminal measurement report carried in the uplink RRC message.
In some embodiments, a terminal context response message sent by the target DU is received after the CU-CP sends the terminal context setup request message to the target DU, where the terminal context response message may include a data radio loop back (Data Radio Backhaul, DRB), a signaling radio bearer (Signalling radio bearer, SRB), and a BH RLC channel. The RLC channel between two nodes of the BH RLC channel is used for transmitting backhaul data packets.
S220, sending a context modification request to the CU-UP, wherein the CU-UP is arranged on the low orbit satellite.
In some embodiments, the context modification request includes downstream network layer (The Network Layer, TNL) address information of the F1-U interface and status information of the packet data convergence protocol (Packet Data Convergence Protocol, PDCP).
In some embodiments, after the CU-CP sends the context modification request to the CU-UP, the CU-UP will send a bearer context response to the CU-CP.
And S230, under the condition that the context modification response of the CU-UP is received, a terminal context modification message is sent to the source DU, so that the source DU stops receiving the terminal data transmission, and the terminal is instructed to randomly access the target DU.
In some embodiments, after the CU-CP sends the terminal context modification message to the source DU, the source DU may send a downlink data transfer frame to the CU-UP to inform the CU-UP of the unsuccessfully transmitted UE downlink data.
In some embodiments, the terminal context modification message comprises an RRC reconfiguration message.
In some embodiments, the source DU may send the RRC reconfiguration message to the terminal after receiving the RRC reconfiguration message. And receiving a terminal context modification response message sent by the terminal.
In some embodiments, the source DU may forward the terminal context response message to the CU-CP after accepting the terminal context modification response message.
In some embodiments, the target DU may send a downlink data transfer status frame to the CU-UP, and the downlink user data packet may be sent by the CU-UP to the target DU.
S240, receiving a reconfiguration complete message sent by the terminal.
In some embodiments, the terminal may send a reconfiguration complete message to the target DU, which forwards the reconfiguration complete message to the CU-CP.
According to the switching method provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Fig. 3 is a schematic flow chart of a handover method according to an embodiment of the present disclosure, where it is to be noted that the handover method according to the embodiment of the present disclosure is applied to CU-CPs disposed on high-orbit satellites.
As shown in fig. 3, the handover method may include:
s310, sending a terminal context establishment request message to a target DU under the condition that a terminal measurement report sent by a source DU is received, wherein the source DU and the target DU are both arranged on a low-orbit satellite;
s320, sending a context modification request to the CU-UP, wherein the CU-UP is arranged on a low orbit satellite;
s330, under the condition that a context modification response of the CU-UP is received, a terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, and the terminal is instructed to randomly access the target DU;
s340, receiving a reconfiguration completion message sent by the terminal;
s350, sending a context release request to the source DU so that the source DU can complete the context release.
According to the switching method provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Based on the same inventive concept, a switching method is also provided in the embodiments of the present disclosure, as follows. Since the principle of solving the problem of this method embodiment is similar to that of the above method embodiment, the implementation of this method embodiment may refer to the implementation of the above method embodiment, and the repetition is not repeated.
Fig. 4 is a flowchart of another handoff method according to an embodiment of the present disclosure, where the handoff method according to the embodiment of the present disclosure is applied to a source DU disposed on a low-orbit satellite.
As shown in fig. 4, the handover method may include:
s410, receiving a terminal measurement report sent by a terminal;
s420, a terminal measurement report is sent to a CU-CP, so that the CU-UP sends a terminal context establishment request message to a target DU, and sends a context modification request to the CU-UP, the CU-CP is arranged on a high orbit satellite, and the CU-UP is arranged on a low orbit satellite;
s430, receiving a terminal context modification message sent by the CU-CP under the condition that the CU-CP receives a context modification response sent by the CU-UP;
s440, under the condition that the terminal context modification message sent by the CU-CP is received, stopping data transmission of the receiving terminal, and indicating the terminal to randomly access a target DU, wherein the target DU is arranged on the low orbit satellite.
According to the switching method provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Fig. 5 is a flowchart of another handover method according to an embodiment of the present disclosure, where the handover method according to the embodiment of the present disclosure is applied to a source DU disposed on a low-orbit satellite.
As shown in fig. 5, the handover method may include:
s510, receiving a terminal measurement report sent by a terminal;
s520, a terminal measurement report is sent to a CU-CP, so that the CU-UP sends a terminal context establishment request message to a target DU, and sends a context modification request to the CU-UP, the CU-CP is arranged on a high orbit satellite, and the CU-UP is arranged on a low orbit satellite;
s530, receiving a terminal context modification message sent by the CU-CP under the condition that the CU-CP receives a context modification response sent by the CU-UP;
s540, stopping data transmission of a receiving terminal and indicating the terminal to randomly access a target DU, wherein the target DU is arranged on a low-orbit satellite under the condition that a terminal context modification message sent by a CU-CP is received;
s550, receiving a context release request sent by the CU-CP under the condition that the CU-CP receives a reconfiguration completion message sent by the terminal;
s560, completing the context release.
According to the switching method provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Based on the same inventive concept, a switching device is also provided in the embodiments of the present disclosure, as follows. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.
Fig. 6 shows a schematic diagram of a switching device in an embodiment of the present disclosure, where it is noted that the switching device in the embodiment of the present disclosure is applied to CU-CPs disposed on a high-orbit satellite.
As shown in fig. 6, the switching device 600 may include:
a first sending module 610, configured to send a terminal context establishment request message to a target DU when a terminal measurement report sent by a source DU is received, where the source DU and the target DU are both disposed on a low-orbit satellite;
a second sending module 620, configured to send a context modification request to a CU-UP, where the CU-UP is located on a low orbit satellite;
a third sending module 630, configured to send a terminal context modification message to the source DU when receiving the context modification response of the CU-UP, so that the source DU stops receiving the terminal data transmission, and instructs the terminal to randomly access the target DU;
a first receiving module 640, configured to receive a reconfiguration complete message sent by the terminal.
According to the switching device provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the communication device is set on the satellite and the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
In one embodiment of the present disclosure, the handover request includes an identification of a handover target and a handover method;
and a fifth sending module, configured to send a context release request to the source DU, so that the source DU completes the context release.
According to the switching device provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the communication device is set on the satellite and the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Based on the same inventive concept, a switching device is also provided in the embodiments of the present disclosure, as follows. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.
Fig. 7 is a schematic diagram of another switching apparatus according to an embodiment of the present disclosure, where the switching apparatus according to the embodiment of the present disclosure is applied to a source DU disposed on a low-orbit satellite.
As shown in fig. 7, the switching device 700 may include:
a second receiving module 710, configured to receive a terminal measurement report sent by a terminal;
a fourth sending module 720, configured to send a terminal measurement report to a CU-CP, so that the CU-UP sends a terminal context setup request message to the target DU, and sends a context modification request to the CU-UP, where the CU-CP is disposed on a high-orbit satellite and the CU-UP is disposed on a low-orbit satellite;
a third receiving module 730, configured to receive a terminal context modification message sent by the CU-CP, where the CU-CP receives a context modification response sent by the CU-UP;
and the indication module 740 is configured to stop data transmission of the receiving terminal and instruct the terminal to randomly access to a target DU, where the target DU is set on the low-orbit satellite, when the terminal context modification message sent by the CU-CP is received.
According to the switching device provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the communication device is set on the satellite and the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
In one embodiment of the present disclosure, the switching device further includes:
a fourth receiving module, configured to receive a context release request sent by the CU-CP when the CU-CP receives a reconfiguration complete message sent by the terminal;
and the release module is used for completing the context release.
According to the switching device provided by the embodiment of the disclosure, under the condition that the terminal measurement report sent by the source DU is received, a terminal context establishment request message is sent to the target DU, a context modification request is sent to the CU-UP, under the condition that the context modification response of the CU-UP is received, the terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, instructs the terminal to randomly access the target DU, and receives a reconfiguration completion message sent by the terminal, by setting the CU-CP on a high-orbit satellite and setting the CU-UP on a low-orbit satellite, the communication device is set on the satellite and the control plane of the communication device is separated from the user plane, the control panel and the user plane can be unilaterally upgraded, and the flexibility of the network is improved.
Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.
An electronic device 800 according to such an embodiment of the present disclosure is described below with reference to fig. 8. The electronic device 800 shown in fig. 8 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.
As shown in fig. 8, the electronic device 800 is embodied in the form of a general purpose computing device. Components of electronic device 800 may include, but are not limited to: the at least one processing unit 810, the at least one memory unit 820, and a bus 830 connecting the various system components, including the memory unit 820 and the processing unit 810.
Wherein the storage unit stores program code that is executable by the processing unit 810 such that the processing unit 810 performs steps according to various exemplary embodiments of the present disclosure described in the above section of the present specification. For example, the processing unit 810 may perform the following steps of the method embodiment described above:
transmitting a terminal context establishment request message to a target DU under the condition that a terminal measurement report transmitted by a source DU is received, wherein the source DU and the target DU are both arranged on a low orbit satellite;
sending a context modification request to a CU-UP, wherein the CU-UP is arranged on a low-orbit satellite;
under the condition that a context modification response of the CU-UP is received, a terminal context modification message is sent to the source DU, so that the source DU stops receiving terminal data transmission, and the terminal is instructed to randomly access the target DU;
and receiving a reconfiguration completion message sent by the terminal. Or alternatively, the process may be performed,
receiving a terminal measurement report sent by a terminal;
transmitting a terminal measurement report to a CU-CP (CU-user equipment) so that the CU-UP transmits a terminal context establishment request message to a target DU and transmits a context modification request to the CU-UP, wherein the CU-CP is arranged on a high-orbit satellite, and the CU-UP is arranged on a low-orbit satellite;
receiving a terminal context modification message sent by the CU-CP under the condition that the CU-CP receives a context modification response sent by the CU-UP;
and stopping data transmission of the receiving terminal and indicating the terminal to randomly access a target DU which is arranged on the low orbit satellite under the condition that the terminal context modification message sent by the CU-CP is received.
The storage unit 820 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 8201 and/or cache memory 8202, and may further include Read Only Memory (ROM) 8203.
Storage unit 820 may also include a program/utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
Bus 830 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
The electronic device 800 may also communicate with one or more external devices 840 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 800, and/or any device (e.g., router, modem, etc.) that enables the electronic device 800 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 850. Also, electronic device 800 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 860. As shown, network adapter 860 communicates with other modules of electronic device 800 over bus 830. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 800, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure. In some possible implementations, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the "exemplary methods" section of this specification, when the program product is run on the terminal device.
More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
In this disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Alternatively, the program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
In particular implementations, the program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.
From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A handover method applied to a CU-CP provided on a high-orbit satellite, comprising:
transmitting a terminal context establishment request message to a target DU under the condition that a terminal measurement report transmitted by a source DU is received, wherein the source DU and the target DU are both arranged on a low-orbit satellite;
sending a context modification request to a CU-UP, wherein the CU-UP is arranged on a low-orbit satellite;
sending a terminal context modification message to the source DU under the condition that the context modification response of the CU-UP is received, so that the source DU stops receiving terminal data transmission and indicates the terminal to randomly access a target DU;
and receiving a reconfiguration completion message sent by the terminal.
2. The handover method according to claim 1, wherein the method further comprises:
and sending a context release request to the source DU so that the source DU completes context release.
3. A handover method applied to a source DU provided on a low-orbit satellite, comprising:
receiving a terminal measurement report sent by a terminal;
transmitting the terminal measurement report to a CU-CP, so that the CU-CP transmits a terminal context establishment request message to a target DU and transmits a context modification request to a CU-UP, wherein the CU-CP is arranged on a high-orbit satellite, and the CU-UP is arranged on a low-orbit satellite;
receiving a terminal context modification message sent by the CU-CP under the condition that the CU-CP receives a context modification response sent by the CU-UP;
and under the condition that the context modification message of the terminal sent by the CU-CP is received, stopping receiving the data transmission of the terminal, and indicating the terminal to randomly access the target DU, wherein the target DU is arranged on a low-orbit satellite.
4. A method of switching according to claim 3, characterized in that the method further comprises:
receiving a context release request sent by the CU-CP under the condition that the CU-CP receives a reconfiguration completion message sent by the terminal;
context release is completed.
5. A switching system, comprising: CU-CP, CU-UP, source DU and target DU, wherein the CU-CP is arranged on a high orbit satellite, and the CU-UP, the source DU and the target DU are arranged on a low orbit satellite;
the source DU is used for receiving a terminal measurement report sent by a terminal and sending the terminal measurement report to the CU-CP, stopping receiving data transmission of the terminal under the condition of receiving a terminal context modification message sent by the CU-CP, and indicating the terminal to randomly access the target DU;
the CU-CP is configured to send a terminal context setup request message to the target DU when receiving the terminal measurement report sent by the source DU, send a context modification request to the CU-UP, and send a terminal context modification message to the source DU when receiving a context modification response of the CU-UP.
6. The handover system according to claim 5, wherein the CU-CP is further configured to receive a reconfiguration complete message sent by the terminal, and send a context release request to the source DU;
the source DU is also used to complete the context release.
7. A switching apparatus, applied to a CU-CP provided on a high-orbit satellite, comprising:
a first sending module, configured to send a terminal context establishment request message to a target DU when a terminal measurement report sent by a source DU is received, where the source DU and the target DU are both disposed on a low-orbit satellite;
a second sending module, configured to send a context modification request to a CU-UP, where the CU-UP is disposed on a low-orbit satellite;
a third sending module, configured to send a terminal context modification message to the source DU, in case that a context modification response of the CU-UP is received, so that the source DU stops receiving terminal data transmission, and instructs the terminal to randomly access the target DU;
and the first receiving module is used for receiving the reconfiguration completion message sent by the terminal.
8. A switching apparatus for use with a source DU disposed on a low-orbit satellite, comprising:
the second receiving module is used for receiving a terminal measurement report sent by the terminal;
a fourth sending module, configured to send the terminal measurement report to a CU-CP, so that the CU-CP sends a terminal context setup request message to a target DU, and sends a context modification request to a CU-UP, where the CU-CP is disposed on a high-orbit satellite and the CU-UP is disposed on a low-orbit satellite;
a third receiving module, configured to receive a terminal context modification message sent by the CU-CP when the CU-CP receives a context modification response sent by the CU-UP;
and the indication module is used for stopping receiving the data transmission of the terminal under the condition of receiving the terminal context modification message sent by the CU-CP, and indicating the terminal to randomly access the target DU, wherein the target DU is arranged on a low-orbit satellite.
9. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the handover method of any one of claims 1-4 via execution of the executable instructions.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the handover method according to any one of claims 1-4.
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