Method and apparatus for backhaul link switching
The subject application relates to methods and apparatuses. According to some embodiments of the subject application, a method includes: transmitting an identifier of a first communication device; and transmitting an identifier of a parent communication device of the first communication device, wherein the first communication device, the parent communication device, and a first base unit constitute a first backhaul link.
1. A method comprising:
transmitting an identifier of a first communication device, wherein the identifier comprises an integrated access and backhaul node identifier corresponding to an integrated access and backhaul node; and
transmitting an identifier of a parent communication device of the first communication device, wherein the first communication device, the parent communication device, and a first base unit constitute a first backhaul link, wherein a backhaul link switching request is transmitted based on a measurement result, and the backhaul link switching request comprises an indication of backhaul link switching and an identifier of a new integrated access and backhaul node to switch to;
wherein the backhaul link switching request is transmitted in response to channel quality of a link between the first communication device and the parent communication device being lower than a first threshold value and channel quality of a link between the first communication device and a second communication device being higher than a second threshold value.
2. The method of claim 1 , wherein the identifier of the first communication device and the identifier of the parent communication device are transmitted in one message, and the message is a radio resource control connection request message.
3. The method of claim 1 , further comprising:
receiving measurement configuring information;
performing a measurement process according to the measurement configuring information; and
transmitting the measurement result.
4. The method of claim 3 , wherein the measurement result is transmitted to the first base unit.
5. The method of claim 3 , wherein the measurement result comprises:
a measurement result of a link between the parent communication device and the first communication device;
a measurement result of a link between a second communication device on a second backhaul link and the first communication device; or
a combination thereof.
6. The method of claim 5 , further comprising transmitting the following information:
an identifier of the second communication device on the second backhaul link;
an identifier of a second base unit on the second backhaul link;
number of hops from the second communication device to the second base unit;
load information of the second communication device; or
a combination thereof.
7. The method of claim 6 , wherein the load information of the second communication device further comprises:
utilization information of resources allocated to the second communication device;
number of user equipments served by the second communication device; or
a combination thereof.
8. The method of claim 1 , further comprising:
receiving a backhaul link switching command from the first base unit; and
performing a backhaul link switching operation.
9. The method of claim 8 , wherein performing the backhaul link switching operation comprises accessing, by the first communication device, a communication device on a backhaul link, wherein the communication device is indicated by the backhaul link switching command.
10. The method of claim 8 , wherein the backhaul link switching command comprises an identifier of a communication device on a backhaul link, wherein the first communication device will access the communication device during the backhaul link switching operation.
11. The method of claim 1 , wherein information indicating backhaul link switching completion is transmitted from a second base unit to the first base unit.
12. A method comprising:
receiving an identifier of a first communication device;
receiving an identifier of a parent communication device of the first communication device from the parent communication device, wherein the first communication device, the parent communication device, and a first base unit constitute a first backhaul link; and
transmitting a backhaul link switching request based on a measurement result, wherein the backhaul link switching request comprises an indication of backhaul link switching and an identifier of a new integrated access and backhaul node to switch to;
wherein the backhaul link switching request is transmitted in response to channel quality of a link between the first communication device and the parent communication device being lower than a first threshold value and channel quality of a link between the first communication device and a second communication device being higher than a second threshold value.
13. The method of claim 12 , further comprising:
transmitting measurement configuring information; and
receiving the measurement result.
14. The method of claim 13 , wherein the backhaul link switching request is sent from a source integrated access and backhaul node to a target integrated access and backhaul node.
15. The method of claim 14 , wherein the backhaul link switching request comprises:
the identifier of the first communication device;
an identifier of a user equipment served by the first communication device;
a context of the user equipment;
a measurement result of a link between a second communication device on a second backhaul link and the first communication device;
an identifier of the second communication device on the second backhaul link; or
a combination thereof.
16. The method of claim 13 , further comprising receiving an indication of access completion from a communication device on a backhaul link, wherein the first communication device accesses to the communication device during a backhaul link switching operation.
17. The method of claim 13 , wherein the measurement result comprises:
a measurement result of a link between the parent communication device and the first communication device;
a measurement result of a link between a second communication device on a second backhaul link and the first communication device; or
a combination thereof.
18. The method of claim 17 , further comprising receiving the following information:
an identifier of the second communication device on the second backhaul link;
an identifier of a second base unit on the second backhaul link;
number of hops from the second communication device to the second base unit;
load information of the second communication device; or
a combination thereof.