Cell reconfiguration method, network control node, and mobile IAB node
Embodiments of the present disclosure provide a cell reconfiguration method, a network control node, and a mobile IAB node. The method includes: performing a cell reconfiguration operation, where the performing a cell reconfiguration operation includes: configuring a mobile IAB node to configure a second cell as a secondary cell or a primary secondary cell of a terminal and to configure the second cell to establish a connection with the terminal; and configuring the mobile IAB node and the terminal to release a first cell. The second cell is a new cell created by the mobile IAB node or an existing cell of the mobile IAB node, and the terminal is a terminal that provides services to the first cell.
1. A cell reconfiguration method performed by a mobile integrated access backhaul (IAB) node, comprising:
receiving reconfiguration information of a first cell; and
performing a cell reconfiguration operation according to the reconfiguration information, wherein the performing a cell reconfiguration operation comprises:
configuring a second cell as a secondary cell or a primary secondary cell of a terminal, and establishing a connection between the second cell and the terminal, wherein the second cell is a new cell created by the mobile IAB node, and the terminal is a terminal that provides services to the first cell; and
releasing the first cell;
wherein in a case that the first cell is a secondary cell, the performing a cell reconfiguration operation comprises:
releasing the first cell; and
creating a new cell as the second cell on a carrier of the first cell, and configuring the second cell as a secondary cell of the terminal;
activating the second cell.
2. The method according to claim 1 , wherein before the receiving reconfiguration information of a first cell, the method further comprises:
in a case that it is detected that a physical cell identifier (PCI) of the first cell is the same as a PCI of a surrounding cell, transmitting a PCI conflict report.
3. The method according to claim 1 , wherein in a case that the first cell is a primary cell, the performing a cell reconfiguration operation comprises:
configuring the second cell as a secondary cell or a primary secondary cell of the terminal and to configure the second cell to establish a connection with the terminal, wherein the second cell is a campable new cell created by the mobile IAB node;
configuring the second cell as a new primary cell; and
releasing the first cell.
4. The method according to claim 3 , wherein the configuring a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
creating a new cell as the second cell on a carrier of the first cell, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal;
wherein the creating a new cell as the second cell on a carrier of the first cell comprises:
transmitting discovery reference signals of the second cell and the first cell on the carrier in a frequency division multiplexing manner.
5. The method according to claim 3 , wherein the configuring a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
in a case that the mobile IAB node supports at least two carriers and there is no inter-frequency cell, creating a new cell as the second cell on an inter-frequency, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal; or
in a case that the mobile IAB node supports at least two carriers and there is an inter-frequency cell but the inter-frequency cell is a non-campable cell, reconfiguring the inter-frequency cell as a campable cell for use as the second cell, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal; or
in a case that the mobile IAB node supports at least two carriers and there is a campable inter-frequency cell, using the inter-frequency cell as the second cell to configure the second cell as a secondary cell or a primary secondary cell of the terminal.
6. The method according to claim 1 , wherein the releasing the first cell comprises:
stopping transmitting the discovery reference signal of the first cell.
7. A cell reconfiguration method performed by a network control node, comprising:
configuring a mobile integrated access backhaul (IAB) node to perform the method of claim 1 ; and
configuring the terminal to release the first cell.
8. The method according to claim 7 , wherein the performing a cell reconfiguration operation comprises:
in a case that a physical cell identifier (PCI) conflict occurs between the first cell and a surrounding cell or there is a potential PCI conflict, performing the cell reconfiguration operation.
9. The method according to claim 8 , wherein before the performing a cell reconfiguration operation, the method further comprises:
in a case that a PCI conflict report that is transmitted by the mobile IAB node or the terminal and is about the first cell is received, determining that a PCI conflict occurs between the first cell and a surrounding cell; or
in a case that it is detected that a PCI of the first cell is the same as a PCI of a surrounding cell, determining that a PCI conflict occurs between the first cell and the surrounding cell; or
in a case that it is predicted that within a future specified time period, a PCI of the first cell is the same as a PCI of a cell in an area at which the mobile IAB node is about to arrive, determining that there is a potential PCI conflict in the first cell; or
in a case that it is detected that a PCI of the first cell is the same as a PCI of a cell within a specified distance from the mobile IAB node, determining that there is a potential PCI conflict in the first cell.
10. The method according to claim 8 , wherein in a case that the second cell is a new cell created by the mobile IAB node, the configuring a mobile IAB node to configure a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
selecting a PCI that does not conflict with a PCI of the first cell; and
configuring the mobile IAB node to use the non-conflicting PCI to create a new cell as the second cell.
11. The method according to claim 7 , wherein in a case that the first cell is a primary cell, the performing a cell reconfiguration operation comprises:
configuring the mobile IAB node to configure the second cell as a secondary cell or a primary secondary cell of the terminal and to configure the second cell to establish a connection with the terminal, wherein the second cell is a campable new cell created by the mobile IAB node;
configuring the mobile IAB node to configure the second cell as a new primary cell; and
configuring the mobile IAB node and the terminal to release the first cell.
12. The method according to claim 11 , wherein the configuring a mobile IAB node to configure a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
configuring the mobile IAB node to create a new cell as the second cell on a carrier of the first cell, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal;
wherein the configuring the mobile IAB node to create a new cell as the second cell on a carrier comprises:
configuring the mobile IAB node to transmit discovery reference signals of the second cell and the first cell on the carrier in a frequency division multiplexing manner.
13. The method according to claim 11 , wherein the configuring a mobile IAB node to configure a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
in a case that the mobile IAB node supports at least two carriers and there is no inter-frequency cell, configuring the mobile IAB node to create a new cell as the second cell on an inter-frequency, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal; or
in a case that the mobile IAB node supports at least two carriers and there is an inter-frequency cell but the inter-frequency cell is a non-campable cell, configuring the mobile IAB node to reconfigure the inter-frequency cell as a campable cell for use as the second cell, and configuring the second cell as a secondary cell or a primary secondary cell of the terminal; or
in a case that the mobile IAB node supports at least two carriers and there is a campable inter-frequency cell, configuring the mobile IAB node to use the inter-frequency cell as the second cell to configure the second cell as a secondary cell or a primary secondary cell of the terminal.
14. The method according to claim 7 , wherein in a case that the first cell is a secondary cell, the performing a cell reconfiguration operation comprises:
configuring the mobile IAB node and the terminal to release the first cell; and
configuring the mobile IAB node to create a new cell as the second cell on a carrier of the first cell, and configuring the second cell as a secondary cell of the terminal;
configuring the mobile IAB node to activate the second cell.
15. The method according to claim 7 , wherein the configuring the mobile IAB node and the terminal to release the first cell comprises:
configuring the mobile IAB node to stop transmitting a discovery reference signal of the first cell; and
configuring the terminal to release a connection with the first cell.
16. A network control node, comprising:
a processor; and
a memory storing a computer program that is capable of being run on the processor, wherein the computer program, when executed by the processor, performs the method of claim 7 .
17. The network control node according to claim 16 , wherein the performing a cell reconfiguration operation comprises:
in a case that a physical cell identifier (PCI) conflict occurs between the first cell and a surrounding cell or there is a potential PCI conflict, performing the cell reconfiguration operation.
18. The network control node according to claim 17 , wherein before the performing a cell reconfiguration operation, the method further comprises:
in a case that a PCI conflict report that is transmitted by the mobile IAB node or the terminal and is about the first cell is received, determining that a PCI conflict occurs between the first cell and a surrounding cell; or
in a case that it is detected that a PCI of the first cell is the same as a PCI of a surrounding cell, determining that a PCI conflict occurs between the first cell and the surrounding cell; or
in a case that it is predicted that within a future specified time period, a PCI of the first cell is the same as a PCI of a cell in an area at which the mobile IAB node is about to arrive, determining that there is a potential PCI conflict in the first cell; or
in a case that it is detected that a PCI of the first cell is the same as a PCI of a cell within a specified distance from the mobile IAB node, determining that there is a potential PCI conflict in the first cell.
19. The network control node according to claim 17 , wherein in a case that the second cell is a new cell created by the mobile IAB node, the configuring a mobile IAB node to configure a second cell as a secondary cell or a primary secondary cell of a terminal comprises:
selecting a PCI that does not conflict with a PCI of the first cell; and
configuring the mobile IAB node to use the non-conflicting PCI to create a new cell as the second cell.