CN110798902B - Radio bearer processing method - Google Patents

Radio bearer processing method Download PDF

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Publication number
CN110798902B
CN110798902B CN201810877843.8A CN201810877843A CN110798902B CN 110798902 B CN110798902 B CN 110798902B CN 201810877843 A CN201810877843 A CN 201810877843A CN 110798902 B CN110798902 B CN 110798902B
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rrc reconfiguration
iab
target
iab node
radio bearer
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CN110798902A (en
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陶雄强
林佩
池连刚
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a radio bearer processing method, which comprises the following steps: determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE; sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE; and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer. The radio bearer processing method provided by the embodiment of the invention controls the relevant operation of radio bearer among all nodes through the IAB main node, thereby realizing service transmission in the 5G IAB network.

Description

Radio bearer processing method
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a wireless bearing processing method.
Background
5G NR (New RAT) is a research hotspot of current wireless communication technology. In view of the deployment scenario and application of future cellular networks, supporting wireless backhaul and relay links may better enable flexible and ultra-dense deployment of future NR cells without requiring proportionally dense deployment of wired transmission networks. The Integrated Access and Backhaul (IAB) technology has significant advantages in the early stages of network deployment. Fig. 1 is a schematic diagram of a centralized access and backhaul network deployment, where, as shown in fig. 1, there are multiple centralized access and backhaul links, and nodes A, B and C can both provide wireless access for terminal UEs; node a may be regarded as a centralized primary IAB node (IAB node), and nodes B and C may return with node a wirelessly, and then node a transmits to the core network through a wired optical fiber.
In the existing 5G NR system, a PDU (Packet Data Uint) session establishment process is triggered by an Access and Mobility Management module (AMF). Fig. 2 is a schematic diagram illustrating PDU session establishment in a 5G NR system according to an embodiment of the present invention, where as shown in fig. 2, the PDU session establishment mainly includes the following steps:
1) the 5G core network sends PDU session establishment information to a base station (gNB), wherein the PDU session establishment information comprises NAS information needing to be sent to the UE and provides NAS QoS related information;
2) the gNB sends a data bearer (DRB) establishment request message between the terminal and the base station to the UE, wherein the DRB establishment request message comprises related DRB parameters and a received NAS message;
3) the UE at least establishes a default DRB related to a new PDU session according to the gNB information, and establishes a mapping relation between QFI (QoS Flow ID) and the DRB;
4) the UE sends RRC DRB establishment completion information to the gNB;
5) the gNB sends a PDU session establishment confirmation message to the 5 GC;
6) and the data bearer is transmitted to the gNB on the PDU session, and then the data bearer is transmitted to the UE on the DRB.
However, in the 5G IAB network, the UE may first access the IAB node, the IAB node transmits the wireless backhaul to the main IAB node, and then transmits the wireless backhaul to the 5G core network by the IAB node through a wired link.
Disclosure of Invention
To solve the above problem, embodiments of the present invention provide a radio bearer processing method that overcomes or at least partially solves the above problem.
In a first aspect, an embodiment of the present invention provides a radio bearer processing method, including:
determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE;
sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE;
and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer.
In a second aspect, an embodiment of the present invention further provides a radio bearer processing method, including:
receiving a first RRC reconfiguration message sent by an IAB (integrated access point) door;
performing the related operation of the radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE;
and after receiving second RRC reconfiguration complete messages which are sequentially and upwards sent by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB door so that the IAB door can determine that the target UE successfully establishes the radio bearer.
The third aspect of the present invention further provides an IAB door, including:
a radio bearer determining module, configured to determine a target UE that needs to establish a radio bearer and all IAB nodes that provide radio access to the target UE;
the first RRC reconfiguration module is used for sending a first RRC reconfiguration message to a first IAB node so as to indicate the first IAB node to carry out related operations of radio bearers according to the first RRC reconfiguration message, and sequentially sending a second RRC reconfiguration message downwards according to a routing sequence until the target UE;
and a configuration completion module, configured to determine that the target UE successfully establishes the radio bearer after receiving a first RRC reconfiguration completion message sent by the first IAB node.
Fourth aspect an embodiment of the present invention further provides an IAB node, including:
the receiving module is used for receiving a first RRC reconfiguration message sent by an IAB (integrated access control) device;
a second RRC reconfiguration module, configured to perform operations related to the radio bearer according to the first RRC reconfiguration message, and sequentially send second RRC reconfiguration messages downward according to the routing order until the target UE
And a reconfiguration complete sending module, configured to send a first RRC reconfiguration complete message to the IAB node after receiving a second RRC reconfiguration complete message that is sequentially sent upward by the target UE according to the routing order, so that the IAB node determines that the target UE successfully establishes a radio bearer.
Fifth aspect an embodiment of the present invention provides a radio bearer processing apparatus, including:
a processor, a memory, a communication interface, and a bus; the processor, the memory and the communication interface complete mutual communication through the bus; the memory stores program instructions executable by the processor, and the processor calls the program instructions to perform a radio bearer processing method as described above.
A sixth aspect of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the above radio bearer processing method.
The radio bearer processing method provided by the embodiment of the invention controls the relevant operation of radio bearer among all nodes through the IAB main node, thereby realizing service transmission in the 5G IAB network.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a centralized access and backhaul network deployment;
fig. 2 is a schematic diagram illustrating PDU session establishment in a 5G NR system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for radio bearer processing according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a radio bearer processing method according to another embodiment of the present invention;
fig. 5 is a schematic diagram of radio bearer processing signaling interaction according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an IAB doner according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an IAB node according to an embodiment of the present invention;
fig. 8 is a block diagram of a radio bearer processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Currently, in a 5G IAB network, a UE may first access an IAB node, where the IAB node transmits to a main IAB node (IAB donor) through a wireless backhaul, and then transmits to a 5G core network through a wire by the IAB node.
To address the above situation, fig. 3 is a flowchart illustrating a radio bearer processing method according to an embodiment of the present invention, as shown in fig. 3, including:
301. determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE;
302. sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE;
303. and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer.
It should be noted that an application scenario of the radio bearer processing method provided in the embodiment of the present invention is a service transmission scenario of a 5G IAB network, and a radio session can be established between a core network and a UE by using the radio bearer processing method provided in the embodiment of the present invention.
The embodiment shown in fig. 3 has an execution main body of an IAB donor, and the scheme provided in the embodiment of the present invention can control each IAB node to perform related operations of a radio bearer through the IAB donor, where the related operations mainly include two aspects of establishment and modification of the radio bearer.
Specifically, in step 301, it can be understood that, for a 5G core network, hereinafter referred to as a 5GC for short, when a UE needs to access the 5GC and triggers the method provided in the embodiment of the present invention, the IAB donor can determine an ID number of a target UE that needs to establish a radio bearer, and further determine each IAB node that can provide a radio access function for the target UE according to the ID number of the target UE. It should be noted that the scheme provided in the embodiment of the present invention supports multi-hop transmission, so that there may be one or more IAB nodes, and when determining each IAB node, it is necessary to determine a routing relationship between each IAB node, and a determination method of the routing relationship is not specifically limited in the embodiment of the present invention.
Further, in step 302, after the target UE and each IAB node are determined in step 301, the IAB donor needs to send a first RRC reconfiguration message to the first IAB node, so as to control each IAB node to perform radio bearer establishment or modification in sequence. Wherein, it can be understood that the first IAB node is the top IAB node determined in the routing relationship; correspondingly, the first RRC reconfiguration message refers to an RRC reconfiguration message transmitted by the IAB donor to the first IAB node, and in the embodiment of the present invention, the numerical notation such as "first", "second", etc. is only used to indicate content differentiation, and no other reference meanings exist. Then, after receiving the first RRC reconfiguration message sent by the IAB donor, the first IAB node may perform a related operation of the radio bearer according to the first RRC reconfiguration message, that is, complete establishment and modification of the radio bearer, where the establishment and modification of the radio bearer between the first IAB node and the IAB donor are completed, and after the establishment and modification of the radio bearer between the first IAB node and the IAB donor are completed, the first IAB node needs to sequentially send the second RRC reconfiguration message downward according to the routing order until the target UE. The second RRC reconfiguration message includes an RRC reconfiguration message transferred between IAB nodes and an RRC reconfiguration message transmitted by the lowest IAB node to the target UE. It should be noted that the RRC reconfiguration message generally includes IDs of all IABs, IDs of target UEs, QoS parameter configuration between all IABs, and related parameters of QoS Flow ID (QFI), drb (data rb), so that the first RRC reconfiguration message provided in the embodiment of the present invention substantially includes information content of the second RRC reconfiguration message, and the first RRC reconfiguration message sent by the IAB donor can indicate all IABs to sequentially complete establishment and modification of radio bearers, and finally indicate the lowest IAB node to complete establishment and modification of radio bearers with the target UEs.
Correspondingly, in step 303, it can be understood that, after the RRC reconfiguration is successful, a corresponding RRC reconfiguration complete message needs to be fed back, and for the target UE, after the RRC reconfiguration message sent by the lowest IAB node is received, the DRB is established or modified according to the content of the RRC reconfiguration message, and after the reconfiguration is completed, the content of the corresponding RRC reconfiguration message is fed back to the lowest IAB node, so that the lowest IAB node sequentially feeds back the RRC reconfiguration complete message upwards until the uppermost IAB node sends the first RRC reconfiguration complete message to the IAB donor. Then, when the IAB donor receives the first RRC reconfiguration complete message, it may determine that the target UE has completed the corresponding access, and may feed back a response message indicating that the session establishment is complete to the 5 GC.
The radio bearer processing method provided by the embodiment of the invention controls the relevant operation of radio bearer among all nodes through the IAB main node, thereby realizing service transmission in the 5G IAB network.
On the basis of the foregoing embodiments, the determining target UEs that need to establish radio bearers and all IAB nodes that provide radio access for the target UEs includes:
receiving a session establishment request message sent by a core network;
and determining the target UE and each IAB node according to the session establishment request message and the locally stored related information.
As can be seen from the content of the foregoing embodiment, the embodiment of the present invention provides a radio bearer processing scheme in which an IAB donor controls each IAB node, and when the scheme is triggered, a target UE for establishing a radio bearer and all IAB nodes for providing radio access to the target UE need to be determined. Preferably, the scheme provided by the embodiment of the present invention is triggered by receiving a session establishment request message sent by a core network (5GC) through an IAB donor.
Specifically, after the IAB donor receives the session establishment request message sent by the 5GC, the ID of the corresponding target UE that needs to be wirelessly accessed and the IDs of all IAB nodes that the target UE can access are determined according to the session establishment request message and the locally stored related information. The session establishment request message generally includes an NAS message, and the ID of the target UE and the IDs of the involved IABs can be determined by knowing the scope and the transfer direction of the NAS message and QoS parameter information provided in the NAS message and combining with locally pre-stored related IAB node information.
It should be noted that, while determining the target UE and each IAB node, it is also necessary to determine the relevant operation information of the radio bearer between each IAB node, for example: when determining that the UE1 needs to perform radio bearer establishment at this time, and when referring to the IAB1 and the IAB2, it is determined that the radio bearer establishment needs to be performed between the IAB1 and the IAB donor, the radio bearer modification needs to be performed between the IAB1 and the IAB2, and the radio bearer establishment needs to be performed between the IAB2 and the UE 1. And the related operation information of the radio bearer between all the IAB nodes is contained in the RRC configuration message and is sent downwards, so that all the IAB nodes are indicated to carry out corresponding radio bearer processing operation.
On the basis of the foregoing embodiment, the first RRC reconfiguration message at least includes: the ID of the target UE, the ID of each IAB node, the QoS parameter configuration among the IAB nodes and related parameters of radio bearer.
As can be seen from the foregoing description of the embodiment, the first RRC reconfiguration message is an RRC reconfiguration message sent by the IAB donor to the uppermost IAB node (the first IAB node), and each IAB node can be instructed to complete the corresponding radio bearer related operation according to the first RRC reconfiguration message.
Specifically, the first RRC reconfiguration message provided in the embodiment of the present invention needs to include at least: the ID of the target UE, the ID of each IAB node, the QoS parameter configuration between each IAB node, and the related parameters of the radio bearer can achieve the above functions. It can be understood that the routing relationship can be determined by the ID of the target UE and the IDs of the IABs, and then the radio bearer operation information between the IABs can be obtained according to the QoS parameter configuration between the IABs and the related parameters (DRB related parameters) of the radio bearer, that is, it is determined that the DRB establishment operation or the DRB modification operation between the IABs needs to be performed.
Fig. 4 is a flowchart illustrating a radio bearer processing method according to another embodiment of the present invention, as shown in fig. 4, including:
401. receiving a first RRC reconfiguration message sent by an IAB (integrated access point) door;
402. performing the related operation of the radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE;
403. and after receiving second RRC reconfiguration complete messages which are sequentially and upwards sent by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB door so that the IAB door can determine that the target UE successfully establishes the radio bearer.
It should be noted that an application scenario of the radio bearer processing method provided in the embodiment of the present invention is a service transmission scenario of a 5G IAB network, and a radio session can be established between a core network and a UE by using the radio bearer processing method provided in the embodiment of the present invention.
The embodiment shown in fig. 4 is implemented with the uppermost IAB node, i.e. the first IAB node in the above embodiment. The scheme provided by the embodiment of the invention can control each IAB node to carry out the related operation of the radio bearer through the IAB donor, and the related operation mainly comprises two aspects of establishment and modification of the radio bearer.
Specifically, in step 401, the first IAB node receives a first RRC reconfiguration message sent by the IAB node, and as can be seen from the above description of the embodiment, the first RRC reconfiguration message includes an ID of each IAB node, an ID of the target UE, QoS parameter configuration between each IAB node, QoS Flow ID (QFI), and DRB related parameters.
Further, in step 402, the first IAB node may perform related operations of the radio bearer according to the first RRC reconfiguration message, that is, complete DRB establishment or modification with the IAB node according to the indication of the IAB node. And after the DRB establishment or modification operation with the IAB node is completed, the first IAB node sequentially sends second RRC reconfiguration messages downwards according to the routing sequence until the target UE receives the second RRC reconfiguration messages.
Finally, in step 403, the target UE can execute the related processing operation of the radio bearer according to the received RRC reconfiguration message and feed back a second RRC reconfiguration complete message to the lowest IAB node after the processing operation is completed, so that the lowest IAB node sequentially feeds back the RRC reconfiguration complete message to the highest IAB node. And then the IAB node at the uppermost level sends a first RRC reconfiguration complete message to the IAB node, so that the IAB node can determine that the target UE successfully establishes the radio bearer.
The radio bearer processing method provided by the embodiment of the invention controls the relevant operation of radio bearer among all nodes through the IAB main node, thereby realizing service transmission in the 5G IAB network.
On the basis of the above embodiments, the related operations of the radio bearer include DRB establishment or modification between an IAB node and an IAB node, DRB establishment or modification between two IAB nodes, and DRB establishment or modification between the IAB node and the target UE.
As can be seen from the foregoing description of the embodiments, the embodiments of the present invention are mainly directed to related operations of a radio bearer. It can be understood that the related operations of the radio bearer essentially complete the DRB establishment or modification, which will be determined according to the RRC reconfiguration message sent by the IAB doner. Then, in the radio bearer establishment process of the whole network structure, the object of DRB establishment or modification is different, and the embodiment of the present invention may divide it into three relationships, which are essentially related operations including three types of radio bearers. The first type is DRB establishment or modification between an IAB node and an IAB node; the second type is DRB establishment or modification between two IAB nodes; the third type is DRB establishment or modification between the IAB node and the target UE.
On the basis of the foregoing embodiment, the performing, according to the first RRC reconfiguration message, the related operations of the radio bearer, and sequentially sending second RRC reconfiguration messages to the target UE downward according to the routing order includes:
DRB establishment or modification is carried out between the first RRC reconfiguration message and the IAB doner, and whether a second IAB node is included is determined according to the routing sequence;
if the routing order comprises the second IAB node, sending a second RRC reconfiguration message to the second IAB node to indicate the second IAB node to establish or modify a DRB with a next IAB node in the routing order according to the second RRC reconfiguration message;
and if the second IAB node is not included, sending a second RRC reconfiguration message to the target UE to indicate the target UE to carry out DRB establishment or modification according to the second RRC reconfiguration message.
As can be seen from the content of the foregoing embodiment, after receiving the first RRC reconfiguration message, the first IAB node provided in the embodiment of the present invention needs to sequentially send the second RRC reconfiguration messages to the target UE downward according to the routing order.
Specifically, the first IAB node first completes the corresponding IAB done radio bearer operation indication according to the first RRC reconfiguration message sent by the IAB done. And through the rest of the indication contents in the first RRC reconfiguration message, whether the next level IAB node exists is known. If there are several points of the next IAB, that is, the second IAB node, it needs to send a second RRC reconfiguration message to the second IAB node to instruct the second IAB node to perform DRB establishment or modification with the next IAB node in the routing order according to the second RRC reconfiguration message.
Correspondingly, if there are no next-level IAB points for the first IAB node, the first IAB node will directly send a second RRC reconfiguration message to the target UE to instruct the target UE to perform DRB establishment or modification according to the second RRC reconfiguration message.
Fig. 5 is a schematic diagram of a radio bearer processing signaling interaction provided in an embodiment of the present invention, and as shown in fig. 5, the whole radio bearer processing flow includes 9 steps.
It should be noted that the embodiment shown in fig. 5 is described by taking two IAB nodes as an example, i.e., IAB-node1 and IAB-node2 in fig. 5. The number of IABs in the embodiment of the present invention is not specifically limited, and is consistent with the principle of two nodes, and thus the embodiment of the present invention is not described again.
Step 1, 5G core network (5GC) initiates a session establishment request message to IAB donor, the session establishment request message comprises NAS information which needs to be sent to UE, and the NAS information is mainly used for providing NAS QoS related information.
Step 2, the IAB node determines the target UE and each related IAB node according to the session establishment request message content and the local related storage information, and determines the related operations of the radio bearer between the nodes, such as the establishment operation or the modification operation, and sends an RRC reconfiguration message to the IAB-node1, including the ID of each IAB node, the ID of the UE, the QoS parameter configuration between each IAB node, the QoS Flow ID (QFI), and the DRB related parameters, and instructs each IAB node (including IAB node and IAB-node1, IAB-node1 and IAB-node2, IAB-node2 and UE) to establish or modify the DRB.
And step 3, the IAB-node1 executes the establishment or modification of the DRB according to the indication of the IAB donor, and sends an RRC reconfiguration message to the IAB-node2 according to the indication of the IAB donor, wherein the RRC reconfiguration message comprises IDs of all IAB nodes, IDs of UE, QoS parameter configuration among all IAB nodes, QoS Flow ID (QFI) and DRB related parameters, and indicates that the establishment or modification of the DRB is carried out between the IAB-node1 and the IAB-node2 as well as between the IAB-node2 and the UE.
And step 4, the IAB-node2 executes the establishment or modification of the DRB according to the indication of the IAB-node1, and sends an RRC reconfiguration message to the UE according to the indication of the received RRC reconfiguration message, wherein the RRC reconfiguration message comprises the ID of the UE, the QoS parameter configuration, the QoS Flow ID (QFI) and DRB related parameters, and indicates the establishment or modification of the DRB between the IAB-node2 and the UE.
And step 5, the UE executes the establishment or modification of the DRB according to the content of the RRC reconfiguration message.
And step 6, the UE feeds back an RRC reconfiguration complete message to the IAB-node 2.
And step 7, after receiving the RRC reconfiguration complete message of the UE, the IAB-node2 feeds back the RRC reconfiguration complete message to the IAB-node 1.
And 8, after receiving the RRC reconfiguration complete message sent by the IAB-node2, the IAB-node1 feeds back the RRC reconfiguration complete message to the IAB node.
And 9, after receiving the RRC reconfiguration complete message sent by the IAB-node1, the IAB donor feeds back a session establishment response to the 5G core network to inform that the session establishment is completed.
It can be seen from the above process that the primary IAB node provided in the embodiments of the present invention controls the radio bearer establishment or modification of each node, which can implement the radio bearer access of the user, and ensure the normal transmission of the user service in the 5G IAB network.
Fig. 6 is a schematic structural diagram of an IAB door according to an embodiment of the present invention, as shown in fig. 6, including: a radio bearer determining module 601, a first RRC reconfiguration module 602, and a configuration completing module 603, wherein:
the radio bearer determining module 601 is configured to determine a target UE that needs to establish a radio bearer and all IAB nodes that provide radio access to the target UE;
the first RRC reconfiguration module 602 is configured to send a first RRC reconfiguration message to the first IAB node, so as to instruct the first IAB node to perform operations related to radio bearers according to the first RRC reconfiguration message, and sequentially send a second RRC reconfiguration message downward according to the routing order until the target UE;
the configuration completion module 603 is configured to determine that the target UE successfully establishes the radio bearer after receiving the first RRC reconfiguration completion message sent by the first IAB node.
Fig. 7 is a schematic structural diagram of an IAB node according to an embodiment of the present invention, as shown in fig. 7, including: a receiving module 701, a second RRC reconfiguration module 702, and a reconfiguration complete sending module 703, wherein:
the receiving module 701 is configured to receive a first RRC reconfiguration message sent by an IAB door;
the second RRC reconfiguration module 702 is configured to perform operations related to the radio bearer according to the first RRC reconfiguration message, and sequentially send second RRC reconfiguration messages downward according to a routing order until the target UE is reached
The reconfiguration complete sending module 703 is configured to send a first RRC reconfiguration complete message to the IAB node after receiving a second RRC reconfiguration complete message that is sequentially sent upward by the target UE according to the routing order, so that the IAB node determines that the target UE successfully establishes a radio bearer.
An embodiment of the present invention provides a radio bearer processing apparatus, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein:
fig. 8 is a block diagram of a radio bearer processing apparatus according to an embodiment of the present invention, and referring to fig. 8, the radio bearer processing apparatus includes: a processor (processor)810, a communication Interface 820, a memory 830 and a bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the bus 840. The processor 810 may call logic instructions in the memory 830 to perform the following method: determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE; sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE; and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer.
The radio bearer processing device may further perform the following method: receiving a first RRC reconfiguration message sent by an IAB (integrated access point) door; performing the related operation of the radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE; and after receiving second RRC reconfiguration complete messages which are sequentially and upwards sent by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB door so that the IAB door can determine that the target UE successfully establishes the radio bearer.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE; sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE; and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer. May also include, for example: receiving a first RRC reconfiguration message sent by an IAB (integrated access point) door; performing the related operation of the radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE; and after receiving second RRC reconfiguration complete messages which are sequentially and upwards sent by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB door so that the IAB door can determine that the target UE successfully establishes the radio bearer.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE; sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE; and after receiving a first RRC reconfiguration complete message sent by the first IAB node, determining that the target UE successfully establishes the radio bearer. May also include, for example: receiving a first RRC reconfiguration message sent by an IAB (integrated access point) door; performing the related operation of the radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE; and after receiving second RRC reconfiguration complete messages which are sequentially and upwards sent by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB door so that the IAB door can determine that the target UE successfully establishes the radio bearer.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM or RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. A radio bearer processing method, comprising:
determining target UE needing to establish radio bearer and all IAB nodes providing radio access for the target UE;
sending a first RRC reconfiguration message to a first IAB node to indicate the first IAB node to carry out related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to a routing sequence until the target UE;
after receiving a first RRC reconfiguration completion message sent by the first IAB node, determining that the target UE successfully establishes a radio bearer;
the determining target UEs needing to establish radio bearers and all IAB nodes providing radio access for the target UEs includes:
receiving a session establishment request message sent by a core network;
and determining the target UE and each IAB node according to the session establishment request message and the locally stored related information.
2. The method of claim 1, wherein the first RRC reconfiguration message comprises at least: the ID of the target UE, the ID of each IAB node, the QoS parameter configuration among the IAB nodes and related parameters of radio bearer.
3. A radio bearer processing method, comprising:
receiving a first RRC reconfiguration message sent by an IAB donor;
performing related operations of radio bearer according to the first RRC reconfiguration message, and sequentially sending second RRC reconfiguration messages downwards according to the routing sequence until the target UE;
after receiving a second RRC reconfiguration complete message which is sequentially sent upwards by the target UE according to the routing sequence, sending a first RRC reconfiguration complete message to the IAB donor so that the IAB donor can determine that the target UE successfully establishes a radio bearer;
the related operations of the radio bearer comprise DRB establishment or modification between an IAB node and an IAB node, DRB establishment or modification between two IAB nodes and DRB establishment or modification between the IAB node and the target UE;
the performing related operations of radio bearers according to the first RRC reconfiguration message, and sequentially sending the second RRC reconfiguration messages down to the target UE according to the routing order includes:
according to the first RRC reconfiguration message and the IAB donor, DRB establishment or modification is carried out, and whether a second IAB node is included is determined according to the routing sequence;
if the routing order comprises the second IAB node, sending a second RRC reconfiguration message to the second IAB node to indicate the second IAB node to establish or modify a DRB with a next IAB node in the routing order according to the second RRC reconfiguration message;
and if the second IAB node is not included, sending a second RRC reconfiguration message to the target UE to indicate the target UE to carry out DRB establishment or modification according to the second RRC reconfiguration message.
4. An IAB donor, comprising:
a radio bearer determining module, configured to determine a target UE that needs to establish a radio bearer and all IAB nodes that provide radio access to the target UE;
the first RRC reconfiguration module is used for sending a first RRC reconfiguration message to a first IAB node so as to indicate the first IAB node to carry out related operations of radio bearers according to the first RRC reconfiguration message, and sequentially sending a second RRC reconfiguration message downwards according to a routing sequence until the target UE;
a configuration completion module, configured to determine that the target UE successfully establishes a radio bearer after receiving a first RRC reconfiguration completion message sent by the first IAB node;
the determining target UEs needing to establish radio bearers and all IAB nodes providing radio access for the target UEs includes:
receiving a session establishment request message sent by a core network;
and determining the target UE and each IAB node according to the session establishment request message and the locally stored related information.
5. An IAB node, comprising:
the receiving module is used for receiving a first RRC reconfiguration message sent by the IAB donor;
the second RRC reconfiguration module is used for carrying out related operations of radio bearers according to the first RRC reconfiguration message and sequentially sending the second RRC reconfiguration message downwards according to the routing sequence until the second RRC reconfiguration message reaches the target UE;
a reconfiguration complete sending module, configured to send a first RRC reconfiguration complete message to the IAB donor after receiving a second RRC reconfiguration complete message that is sequentially sent upward by the target UE according to the routing order, so that the IAB donor determines that the target UE successfully establishes a radio bearer;
the related operations of the radio bearer comprise DRB establishment or modification between an IAB node and an IAB node, DRB establishment or modification between two IAB nodes and DRB establishment or modification between the IAB node and the target UE;
the performing related operations of radio bearers according to the first RRC reconfiguration message, and sequentially sending the second RRC reconfiguration messages down to the target UE according to the routing order includes:
according to the first RRC reconfiguration message and the IAB donor, DRB establishment or modification is carried out, and whether a second IAB node is included is determined according to the routing sequence;
if the routing order comprises the second IAB node, sending a second RRC reconfiguration message to the second IAB node to indicate the second IAB node to establish or modify a DRB with a next IAB node in the routing order according to the second RRC reconfiguration message;
and if the second IAB node is not included, sending a second RRC reconfiguration message to the target UE to indicate the target UE to carry out DRB establishment or modification according to the second RRC reconfiguration message.
6. A radio bearer processing device, comprising a memory and a processor, wherein the processor and the memory communicate with each other via a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 3.
7. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 3.
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