Information transmission method and device

[0034] Embodiment one

[0035] An embodiment of the present application provides a mobile communication network (including but not limited to a 5G mobile communication network), and the network architecture of the network may include network-side devices (such as base stations) and terminals. This embodiment provides an information transmission method that can run on the above-mentioned network architecture. It should be noted that the operating environment of the above-mentioned information transmission method provided in the embodiment of the present application is not limited to the above-mentioned network architecture.

[0036] The embodiment of this application can run on figure 2 On the network architecture shown, figure 2 is a schematic diagram of the network architecture according to this application document, such as figure 2 As shown, the network architecture includes: A, an IAB node; B, a base station; C, an IAB donor.

[0037] In this embodiment, an information transmission method running on the above-mentioned network architecture is provided, image 3 is a flowchart of an information transmission method according to an embodiment of the present application, such as image 3 As shown, the process includes the following steps:

[0038] Step S302, determining the F1 message to be transmitted from the access and return IAB node;

[0039] Step S304, sending the F1 message from the access and return IAB node to the base station, wherein the F1 message is forwarded to the IAB donor through the base station.

[0040] Through the above steps, the IAB node sends the F1 message to the base station, and forwards the F1 message to the IABdonor through the base station, which solves the problem of the lack of an IAB control plane information transmission scheme suitable for new wireless in the related technology, and realizes the IAB node in a timely and accurate manner. Forward control plane information between IAB donor and IAB donor.

[0041] Optionally, the execution order of step S302 and step S304 can be interchanged, that is, step S304 can be executed first, and then S302 can be executed.

[0042] Optionally, sending the F1 message from the access and backhaul IAB node to the base station includes at least one of the following: the IAB node includes the F1 message in a first RRC message, and sends the first RRC message to the base station; The IAB node sends the F1 message to the base station through the signaling radio bearer SRB.

[0043] Optionally, at least one of the F1 message and the first RRC message satisfies the following characteristics: including at least one of the following information: node identification information of the source node, and node identification information of the target node.

[0044] Optionally, the node identification information is used to identify one of the following information: a distributed unit (Distributed Unit) DU used to identify an IAB node; a base station part used to identify an IAB node; a distributed unit used to identify an IAB donor DU; used to identify the centralized unit (Centralized Unit) CU of the IAB donor; used to identify the part of the base station of the IAB donor.

[0045] Optionally, the node identification information includes one of the following: base station distributed unit identification gNB-DU ID, base station identification, DU identification, CU identification, cell identification, physical cell identification PCI (Physical Cell Identifier), Internet protocol address IP address , the new definition ID.

[0046] Optionally, the node identification information is used to identify the following information: used to identify the MT part of the IAB node.

[0047] The schemes about node identification information described in the above four optional embodiments can be applied to other embodiments of this application document.

[0048] Optionally, the node identification information includes one of the following: cell radio network temporary identification C-RNTI (Cellradio network temporary identifier); C-RNTI+cell identification; C-RNTI+base station identification; C-RNTI+DU identification; C-RNTI +CU logo; F1 application protocol F1AP ID (F1Application Protocol); X2 application protocol X2APID (X2Application Protocol); GTP TEID (GPRS Tunnel Protocol Tunnel EndpointIdentity); newly defined logo.

[0049] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0050] Step 1, the base station receives the F1 message sent by the IAB node;

[0051] Step 2, the base station sends the F1 message to the IAB donor through an X2 message.

[0052] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0053] Optionally, at least one of the X2 message and the F1 message satisfies the following characteristics: it contains one of the following information: node identification information of the source node, and target node identification information.

[0054] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0055] Step 1, the IAB donor sends the F1 message to the base station through the X2 message, wherein the F1 message is sent to the IAB node through the base station.

[0056] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0057] Optionally, at least one of the X2 message and the F1 message satisfies the following characteristics:

[0058] Include at least one of the following information:

[0059] Node identification information of the source node;

[0060] The node identification information of the target node.

[0061] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0062] Step 1, the base station receives the F1 message sent by the IAB donor through the X2 message;

[0063] Step 2, the base station sends the F1 message to the IAB node.

[0064] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0065] Optionally, the base station sends the F1 message to the IAB node, including at least one of the following: the base station includes the F1 message in a first RRC message, and sends the first RRC message to the IAB node; the base station sends the F1 message through the SRB Message to IAB node.

[0066] Optionally, at least one of the F1 message, the first RRC message, and the X2 message satisfies the following characteristics:

[0067] Include at least one of the following information:

[0068] The node identification information of the source node and the node identification information of the target node.

[0069] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0070] Step 1, the IAB node includes the F1 message in the second RRC message;

[0071] Step 2, including the second RRC message in the third RRC message;

[0072] Step 3, sending the third RRC message to the base station, and sending the second RRC message to the IABdonor through the base station.

[0073] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0074] Optionally, at least one of the F1 message, the second RRC message, and the third RRC message satisfies the following characteristics: it contains at least one of the following information: node identification information of the source node, and node identification information of the target node.

[0075] According to another embodiment of the present application document, there is also provided an information transmission method, which is characterized by comprising the following steps:

[0076] Step 1, the base station receives a third RRC message sent by the IAB node, wherein the third RRC message includes a second RRC message, and the second RRC message includes an F1 message;

[0077] Step 2, sending the second RRC message to the IAB donor through an X2 message.

[0078] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0079] Optionally, at least one of the F1 message, the second RRC message, the third RRC message, and the X2 message satisfies the following characteristics: at least one of the following information is included: node identification information of the source node, node identification of the target node information.

[0080] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0081] In step 1, the IAB donor sends a second RRC message to the base station through an X2 message, wherein the second RRC message includes an F1 message, and the base station sends a third RRC message carrying the second RRC message to the IAB node.

[0082] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0083] Optionally, at least one of the F1 message, the second RRC message, the third RRC message, and the X2 message satisfies the following characteristics: contains at least one of the following information: node identification information of the source node, node identification of the target node information.

[0084] According to another embodiment of the present application document, an information transmission method is also provided, including the following steps:

[0085] Step 1, the base station receives the second RRC message sent by the IAB donor through the X2 message, wherein the second RRC message includes the F1 message;

[0086] Step 2, the base station sends a third RRC message to the IAB node, where the third RRC message includes the second RRC message.

[0087] Adopting the above technical solution solves the problem of the lack of IAB control plane information transmission scheme suitable for new wireless in related technologies, and realizes the timely and accurate forwarding of control plane information between the IAB node and the IAB donor.

[0088] The following will be described in conjunction with another embodiment of the application document.

[0089] Figure 4It is a schematic diagram of a scenario in which an IAB node is accessed through an EN-DC method according to this application, (E-UTRAN NRDual connectivity, referred to as EN-DC), UE is connected to IAB node1, and IAB node1 is connected to MeNB (or called eNB), and connect to IAB node2 and IAB donor through NR access technology. Among them, IAB donor is IAB donor CU and/or IAB donor DU. DU, MT function.

[0090] Specific embodiment 1.

[0091] The method in this embodiment is a method in which the RRC message of the IAB node is forwarded by the base station, Figure 5 It is a schematic diagram of the protocol stack according to the specific implementation 1 of the application document.

[0092] like Figure 5 As shown, for uplink, IAB node1 generates RRC message 1, encapsulates RRC message 1 into RRC message 2 (for example, ULInformationTransferMRDC message) and sends it to MeNB. After receiving it, the MeNB parses out the RRC message 1 generated by the IAB node1, encapsulates the RRC message 1 into an X2 message (for example, RRC transfer message) and sends it to the IABdonor.

[0093] Optionally, the RRC message 1 or RRC message 2 or X2 message includes source and/or target node identification information. Among them, the node identification information is used to identify the DU part or CU part or the base station of the IAB node or IAB donor, including but not limited to: gNB-DU ID, base station ID, DU ID, CU ID, cell ID, PCI, newly defined ID. Alternatively, the node identification information is used to identify the MT part of the IAB node or IAB donor, including but not limited to: C-RNTI; C-RNTI+cell identification; C-RNTI+base station identification; C-RNTI+DU identification; C-RNTI+CU ID; F1AP ID; X2AP ID; GTP TEID; newly defined ID; in the transmission scenario of the uplink RRC message in this embodiment, the source node refers to IAB node1, and the target node refers to IAB donor.

[0094] like Figure 5 As shown, for the downlink, the IAB donor generates the RRC message 3, encapsulates the RRC message 3 in an X2 message (for example, RRC transfer message) and sends it to the MeNB. After MeNB analyzes and obtains RRC message 3, it encapsulates RRC message 3 in RRC message 4 (for example, DLInformationTransfer MRDC message, DLInformationTransfer message, or newly defined RRC message) and sends it to IAB node1.

[0095] Optionally, the RRC message 3 or RRC message 4 or X2 message includes source and/or target node identification information. Among them, the node identification information is used to identify the DU part or CU part or the base station of the IAB node or IAB donor, including but not limited to: gNB-DU ID, base station ID, DU ID, CU ID, cell ID, PCI, newly defined ID. Alternatively, the node identification information is used to identify the MT part of the IAB node or IAB donor, including but not limited to: C-RNTI; C-RNTI+cell identification; C-RNTI+base station identification; C-RNTI+DU identification; C-RNTI+CU ID; F1AP ID; X2AP ID; GTP TEID; newly defined ID; in the transmission scenario of the downlink RRC message in this embodiment, the source node refers to the IAB donor, and the target node refers to the IAB node1.

[0096] Specific embodiment 2

[0097] The method in this embodiment is the first method in which the F1 message of the IAB node is forwarded by the base station. Image 6 It is a schematic diagram of a protocol stack according to Embodiment 2 of the present application. Note that, Image 6 There may or may not be an RRC protocol layer between the IAB node 1 and the MeNB.

[0098] like Image 6 As shown, for the uplink, after IAB node1 generates the F1 message, it is encapsulated into RRC message 1 (for example, ULinformation transfer message, newly defined RRC message); or, IAB node 1 directly delivers the F1 message to the PDCP layer for processing without After RRC layer processing. Optionally, IAB node 1 sends it to MeNB through the SRB dedicated to forwarding F1 messages; optional, IAB node 1 obtains bearer configuration information from the donor CU through RRC messages or F1 messages, and the bearer configuration information is used to configure the information dedicated to forwarding F1 messages The SRB can contain the SRB ID and the associated indication information for forwarding the F1 message, or the SRB ID can be used to implicitly indicate that the associated bearer is used to forward the F1 message; or the IAB node1 performs PDCP layer processing and passes the PDCP data packet It carries protocol type indication information, which is used to indicate that it carries an F1 message.

[0099] The IAB node 1 sends the F1 message to the MeNB through the SRB. The MeNB obtains the F1 message generated by the IABnode1 after analyzing the corresponding protocol layer. Then encapsulate the F1 message into an X2 message (for example, F1AP message transfer message, newly defined X2 message) and send it to the IAB donor.

[0100] Optionally, the F1 message or the RRC message or the X2 message includes source and/or target node identification information. Among them, the node identification information is used to identify the DU part or CU part or the base station of the IAB node or IAB donor, including but not limited to: gNB-DUID, base station ID, DU ID, CU ID, cell ID, PCI, newly defined ID. Alternatively, the node identification information is used to identify the MT part of the IAB node or IAB donor, including but not limited to: C-RNTI; C-RNTI+cell identification; C-RNTI+base station identification; C-RNTI+DU identification; C-RNTI+CU ID; F1AP ID; X2AP ID; GTP TEID; newly defined ID; in the transmission scenario of the uplink F1 message in this embodiment, the source node refers to IAB node1, and the target node refers to IAB donor.

[0101] like Image 6 As shown, for the downlink, after the IAB donor generates the F1 message, it encapsulates the F1 message in an X2 message (eg, F1AP message transfer message, newly defined X2 message) and sends it to the MeNB. The MeNB obtains the F1 message after parsing. Then the MeNB encapsulates the F1 message into an RRC message (eg, UL information transfer message, newly defined RRC message) and sends it to the IAB node 1 . Alternatively, the MeNB does not encapsulate the F1 message into the RRC message, but directly submits the F1 message to the PDCP layer for processing, and sends it to the IAB node 1 through the SRB. Optionally, the MeNB sends the message to the IAB node 1 through the SRB dedicated to forwarding the F1 message; or the MeNB performs PDCP layer processing, and carries protocol type indication information through the PDCP data packet, which is used to indicate that it carries the F1 message.

[0102] Optionally, the F1 message or the RRC message or the X2 message includes source and/or target node identification information. Among them, the node identification information is used to identify the DU part or CU part or the base station of the IAB node or IAB donor, including but not limited to: gNB-DUID, base station ID, DU ID, CU ID, cell ID, PCI, newly defined ID. Alternatively, the node identification information is used to identify the MT part of the IAB node or IAB donor, including but not limited to: C-RNTI; C-RNTI+cell identification; C-RNTI+base station identification; C-RNTI+DU identification; C-RNTI+CU ID; F1AP ID; X2AP ID; GTP TEID; newly defined ID; in the transmission scenario of the downlink F1 message in this embodiment, the source node refers to the IAB donor, and the target node refers to the IAB node1.