WO2021062717A1 - Procédé et dispositif de transmission de rapport d'état de mémoire tampon - Google Patents

Procédé et dispositif de transmission de rapport d'état de mémoire tampon Download PDF

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Publication number
WO2021062717A1
WO2021062717A1 PCT/CN2019/109620 CN2019109620W WO2021062717A1 WO 2021062717 A1 WO2021062717 A1 WO 2021062717A1 CN 2019109620 W CN2019109620 W CN 2019109620W WO 2021062717 A1 WO2021062717 A1 WO 2021062717A1
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Prior art keywords
iab node
node
iab
bsr
mac
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PCT/CN2019/109620
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English (en)
Chinese (zh)
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卓义斌
史玉龙
朱元萍
戴明增
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华为技术有限公司
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Priority to CN201980100560.5A priority Critical patent/CN114424621A/zh
Priority to PCT/CN2019/109620 priority patent/WO2021062717A1/fr
Publication of WO2021062717A1 publication Critical patent/WO2021062717A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a method and device for transmitting a buffer status report.
  • the terminal-side device In long term evolution (LTE) systems and other communication systems, if the terminal-side device has uplink data to send, the terminal-side device first sends a buffer state report (BSR) to the base station, and the BSR can indicate the terminal The size of the buffer data to be sent by the side device, so that the base station can allocate uplink resources for the terminal side device according to the size of the buffer data indicated by the BSR.
  • BSR buffer state report
  • the existing BSR reporting mechanism uses Logical Channel Group (LCG) as a unit to report.
  • the buffer data size of each logical channel group includes the total size of buffer data on all logical channels (Logical Channel, LCH) corresponding to this LCG.
  • the integrated access and backhaul (IAB) network is introduced, and the access in the IAB network
  • Both the access link and the backhaul link use wireless transmission schemes to avoid fiber deployment, thereby reducing deployment costs and improving deployment flexibility.
  • the IAB network it includes IAB node (IAB node) and IAB host (IAB donor).
  • the terminal-side device can access the IAB node, and the service data of the terminal-side device can be connected to the IAB host by one or more IAB nodes through a wireless backhaul link for transmission. Since the IAB network supports multi-hop and multi-connection networking, there may be multiple transmission paths between the terminal-side device and the IAB host.
  • IAB nodes are included. During the transmission of the uplink data packet, the previous node needs to send the BSR to the next hop node to apply for uplink resources.
  • an IAB node receives the BSR, it is determined that its corresponding child node will send uplink data to the IAB node, and the uplink data needs to be further sent to the parent node of the IAB node, so that the IAB node is receiving the child node.
  • the node sends the BSR it can send the BSR to its parent node in advance for the uplink data that will reach the IAB node.
  • the uplink data When the uplink data reaches the IAB node, it can speed up the acquisition of uplink resources to achieve rapid transmission to the parent node of the IAB node. Reduce the transmission delay of uplink data.
  • the IAB node before the IAB node obtains the uplink data, it is not sure which parent node the uplink data will be sent to, and thus cannot determine to which parent node the BSR should be sent in advance. If the uplink data is sent to multiple parent nodes to apply for uplink resources at the same time, resources may be wasted; if the BSR is not sent to the parent node in advance, the uplink data transmission delay will be relatively large. For example, as shown in FIG.
  • IAB node 1 the next hop node of IAB node 1 is IAB node 2, and the next hop nodes of IAB node 2 are IAB node 3 and IAB node 4.
  • IAB node 1 receives an uplink data packet, it sends a BSR to IAB node 2, but before receiving the uplink data packet, IAB node 2 cannot determine whether the next hop node of the uplink data packet sent by IAB node 1 is IAB node 3 or IAB Node 4, only when receiving the uplink data packet sent by IAB node 1, can it determine the next hop node according to the routing information carried in the uplink data packet and send the BSR to the next hop node.
  • the purpose of the embodiments of the present application is to provide a buffer status report transmission method and device to solve the problem of how to send the buffer status report.
  • an embodiment of the present application provides a buffer status report transmission method, including:
  • the first access backhaul integrated IAB node determines the second IAB node; the second IAB node is the parent node of the first IAB node; the first IAB node sends the first buffer to the second IAB node Zone status report BSR; the first BSR is used to indicate the amount of uplink data, the first BSR is carried in the first BSR media access control MAC control element CE, and the first BSR MAC CE is used to determine the first BSR Three IAB nodes, or the MAC subheader corresponding to the first BSR MAC CE is used to determine the third IAB node, the third IAB node is the parent node of the second IAB node, and the third IAB node Is the next hop node for the second IAB node to transmit the uplink data.
  • the first IAB node indicates to the second IAB node the next hop node when the uplink data is at the second IAB node through the first BSR, so that when the second IAB node receives the first BSR, it can report to the second IAB node.
  • the next hop node of the second IAB node sends the second BSR, instead of sending the second BSR until the uplink data is acquired as in the prior art, thereby improving the uplink data transmission efficiency and reducing the uplink data transmission delay.
  • the MAC subheader corresponding to the first BSR MAC CE includes first indication information; the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the method before the first IAB node sends the first buffer status report BSR to the second IAB node, the method further includes: the first IAB node obtains the second IAB Routing configuration information from the node to the parent node of the second IAB node; the first IAB node determines the third IAB node according to the routing configuration information.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • an embodiment of the present application provides a buffer status report transmission method, including: a second access backhaul integrated IAB node receives a first buffer status report BSR from a first IAB node; the first BSR uses In order to indicate the amount of uplink data, the first BSR is carried in the first BSR media access control MAC control element CE, and the first BSR MAC CE is used to determine the third IAB node, or the first BSR MAC
  • the MAC subheader corresponding to the CE is used to determine the third IAB node, the third IAB node is the parent node of the second IAB node, and the third IAB node transmits the uplink for the second IAB node The next hop node of the data; the second IAB node sends a second BSR to the third IAB node.
  • the MAC subheader of the first BSR MAC CE includes first indication information; the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • the present application also provides a communication device having any method provided in the first aspect or the second aspect.
  • the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or units corresponding to the above-mentioned functions.
  • the communication device includes a processor configured to support the communication device to perform the corresponding function of the first IAB node or the second IAB node in the method shown above.
  • the communication device may also include a memory, and the storage may be coupled with the processor, which stores program instructions and data necessary for the communication device.
  • the communication device further includes a communication interface, and the communication interface is used to support communication between the communication device and a device such as the first IAB node or the second IAB node.
  • the communication device includes corresponding functional units, which are respectively used to implement the steps in the above method.
  • the function can be realized by hardware, or the corresponding software can be executed by hardware.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the structure of the communication device includes a processing unit and a communication unit, and these units can perform the corresponding functions in the foregoing method examples.
  • a processing unit and a communication unit can perform the corresponding functions in the foregoing method examples.
  • these units can perform the corresponding functions in the foregoing method examples.
  • the present application provides a communication device, including: a processor and a memory; the memory is used to store computer execution instructions, and when the device is running, the processor executes the computer execution instructions stored in the memory to enable the The device executes the methods described in the above aspects.
  • the present application provides a communication device, including: including units or means for performing each step of the above-mentioned aspects.
  • the present application provides a communication device, including a processor and a communication interface, where the processor is configured to communicate with other devices through the communication interface and execute the methods described in the foregoing aspects.
  • the processor includes one or more.
  • the present application provides a communication device, including a processor, configured to be connected to at least one memory, and configured to call a program stored in the at least one memory to execute the methods described in the foregoing aspects.
  • the at least one memory may be located inside the device or outside the device.
  • the processor includes one or more.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • this application also provides a computer program product including instructions, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a chip system, including a processor, configured to execute the methods described in the foregoing aspects.
  • the present application also provides a chip system, including: the first IAB node and the second IAB node provided above.
  • FIG. 1 is a schematic diagram of an IAB network in the prior art
  • Fig. 2 is a schematic diagram of a communication system suitable for an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a method for transmitting a buffer status report according to an embodiment of the application
  • Figure 4 is a schematic diagram of the format of a MAC subheader
  • FIG. 5 is a schematic diagram of the format of a first BSR MAC CE provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of another format of the first BSR MAC CE provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of another format of the first BSR MAC CE provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of another format of the first BSR MAC CE provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • NR new radio
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • eLTE evolved long term evolution
  • future communication systems and other communication systems.
  • NR new radio
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • eLTE evolved long term evolution
  • future communication systems and other communication systems.
  • the terminal-side device is a device with a wireless transceiver function or a chip that can be installed in the device.
  • the device with wireless transceiver function may also be called user equipment (UE), access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, user terminal, user agent Or user device.
  • UE user equipment
  • the terminal-side devices in the embodiments of this application may be mobile phones, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminals, and augmented reality (augmented reality) terminals.
  • the network side device may be a wireless access device under various standards, such as an evolved Node B (eNB), a radio network controller (RNC), or a Node B (Node B).
  • B, NB base station controller
  • BSC base transceiver station
  • BTS base transceiver station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit baseband unit, BBU
  • It can also be the gNB or transmission point (TRP or TP) in the 5G (NR) system, one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or it can also be a gNB or The network node of the transmission point, such as a baseband unit (BBU), or a DU or CU under
  • BBU base
  • a node that supports integrated access and backhaul is called an IAB node, and the IAB node may also be called a relay node (RN).
  • IAB nodes For the convenience of description, all are called IAB nodes below.
  • the IAB node can provide wireless access services for the terminal-side device, and the service data or control information of the terminal-side device is connected to the IAB donor (IAB donor) by the IAB node through a wireless backhaul link for transmission.
  • the IAB node may include at least one mobile terminal (MT) unit and at least one distributed unit (DU). In the embodiment of the present application, only the IAB node includes an MT unit and a DU as an example for description.
  • the MT unit in the IAB node implements the IAB as a terminal to communicate with the parent node of the IAB node and the IAB host node.
  • the DU in the IAB node provides access services for its attached terminal side devices or other IAB nodes, and can also communicate with the IAB host node based on the F1 interface.
  • the MT in the IAB node may also be referred to as the MT functional entity in the IAB node
  • the DU in the IAB node may also be referred to as the DU functional entity in the IAB node.
  • the MT in the IAB node and the MT functional entity in the IAB node are all referred to as "IAB node MT", and the DU in the IAB node and the DU functional entity in the IAB node are all referred to as "IAB node DU”.
  • the IAB host can be an access network element with a complete base station function, or it can be an access network in the form of a separate centralized unit (CU) and distributed unit (DU) Network element.
  • the IAB host CU may also have a separate control plane (CP) and user plane (UP) form.
  • CP control plane
  • UP user plane
  • an IAB host CU is composed of one CU-CP and one or more CU-UPs. This embodiment of the application does not limit this.
  • the CU in the IAB host may also be referred to as the CU functional entity in the IAB host, and the DU in the IAB host may also be referred to as the DU functional entity in the IAB host.
  • the CU in the IAB host and the CU functional entity in the IAB host are referred to as IAB host CU for short
  • the DU in the IAB host and the DU functional entity in the IAB host are referred to as IAB host DU for short.
  • the last hop node of a node refers to the last node in the path containing the node that received the data packet before the node.
  • IAB node 1 is the previous hop node of IAB node 2; for downlink transmission, IAB node 2 is the previous hop node of IAB node 1.
  • the next hop node of a node refers to the first node in the path containing the node that receives the data packet after the node.
  • IAB node 3 or IAB node 4 is the next hop node of IAB node 2; for downlink transmission, IAB node 2 is the downlink of IAB node 3 or IAB node 4.
  • One-hop node for uplink transmission, IAB node 3 or IAB node 4 is the next hop node of IAB node 2; for downlink transmission, IAB node 2 is the downlink of IAB node 3 or IAB node 4.
  • Each IAB node will provide wireless access service and/or wireless backhaul service to the IAB node as a parent node.
  • each IAB node can be regarded as a child node of its parent node.
  • the child node may also be referred to as a lower-level node, and the parent node may also be referred to as an upper-level node.
  • the IAB node 3 and the IAB node 4 are the parent nodes of the IAB node 2; the IAB node 2 is the child node of the IAB node 3, and the IAB node 2 is also the child node of the IAB node 4.
  • Routing path identification In the IAB network, the uplink data of the terminal-side device can be transmitted back to the final IAB host through different transmission paths. In order to distinguish different transmission paths, a different routing path identifier can be assigned to each transmission path, and a section of the transmission path from the terminal side device to the IAB host can be identified through the routing path identifier.
  • the F1 interface involved in the embodiment of this application is the interface between the IAB node DU and the IAB host or the IAB host CU.
  • the F1 interface can also be called F1* interface and other names.
  • the embodiment of this application Can be collectively referred to as F1 interface, but the name is not limited.
  • the F1 interface may also be an interface between functional entities within a device.
  • the F1 interface may be the interface between the DU in the base station and the CU in the base station. .
  • the F1 interface supports user plane protocols and control plane protocols.
  • the user plane protocol layer of the F1 interface includes the general packet radio service (General Packet Radio Service, GPRS) tunneling protocol user plane (GPRS Tunnelling Protocol User Plane, GTP-U) layer, the user datagram protocol (user datagram protocol, UDP) layer and internet protocol (IP) layer.
  • the user plane protocol layer of the F1 interface further includes a PDCP layer and/or an IP security (IP Security, referred to as IPsec) layer.
  • IP Security IP Security
  • control plane protocol layer of the F1 interface includes an F1 application layer protocol (F1 application protocol, F1AP) layer, a stream control transport protocol (stream control transport protocol, SCTP) layer, and an IP layer.
  • F1 application protocol F1 application protocol
  • SCTP stream control transport protocol
  • IP layer an IP layer.
  • control plane protocol layer of the F1 interface further includes one or more of a PDCP layer, an IPsec layer, and a datagram transport layer security (DTLS) layer.
  • PDCP Packet Control Protocol
  • IPsec IP Security
  • DTLS datagram transport layer security
  • first”, “second”, “third”, etc. may be added in front of terms to describe various messages and information, such as first configuration information and second configuration information.
  • the third configuration information, these "first”, “second”, “third”, etc. are only used to distinguish messages, information, etc. from each other, and do not mean that they are limited.
  • FIG. 2 shows a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application.
  • the communication system includes an IAB host, IAB nodes 1 to 4 and at least one terminal side device.
  • the terminal side device connected to the IAB node 1 is shown in FIG. 2.
  • the embodiments of the present application do not limit the number of IAB hosts, IAB nodes, and terminal-side devices in the communication system.
  • the IAB network shown in FIG. 2 supports multi-hop networking. For example, between the IAB node 1 and the IAB host shown in FIG. 2, there are multiple intermediate IAB nodes. In other possible networking scenarios, the IAB node 1 can also be directly connected to the IAB host without other intermediate IAB nodes.
  • the IAB network shown in Figure 2 not only supports multi-hop networking, but also multi-connection networking.
  • each IAB node treats its neighboring node providing backhaul services as a parent node, and accordingly, each IAB node can be regarded as a child node of its parent node.
  • the parent node of the IAB node 3 is the IAB host, and the IAB host regards the IAB node 3 as a child node.
  • the parent nodes of IAB node 2 are IAB node 3 and IAB node 4.
  • Some scenarios in the embodiments of this application are illustrated by taking the scenario of IAB in a wireless communication network as an example. It should be noted that the solutions in the embodiments of this application can also be applied to other wireless communication networks, and the corresponding names can also be other wireless communication networks. Replace the name of the corresponding function in the communication network.
  • FIG. 3 it is a schematic flowchart of a method for transmitting a buffer status report according to an embodiment of this application.
  • the method includes:
  • Step 301 The first IAB node determines the second IAB node.
  • the second IAB node is the parent node of the first IAB node.
  • the first IAB node can be connected to multiple parent nodes.
  • the first IAB node transmits uplink data, from all the parent nodes of the first node, select a parent node as the next parent node to transmit the uplink data. Jump node, the selected parent node is called the second IAB node.
  • the first IAB node may determine the second IAB node in multiple ways, which is not limited in the embodiment of this application. For example, in a possible implementation manner, after the first IAB node obtains the uplink data, the Method, according to the BAP address in the BAP header corresponding to the received uplink data, from the pre-configured routing configuration information, determine the node ID corresponding to the BAP address, so that the IAB node corresponding to the node ID is used as the second IAB node .
  • the first IAB node obtains the uplink data, according to the method in the traditional technology, according to the BAP address in the BAP header corresponding to the received uplink data and the routing path identifier corresponding to the uplink data, From the pre-configured routing configuration information, the node identifier corresponding to the BAP address and the routing path identifier is determined, so that the IAB node corresponding to the node identifier is used as the second IAB node.
  • the first IAB node may obtain the BSR from the child node of the first IAB node, and the BSR of the child node of the first IAB node may be used to indicate the second IAB node.
  • the first BSR The description of, I won’t repeat it here.
  • Step 302 The first IAB node sends the first BSR to the second IAB node.
  • the first BSR is used to indicate the amount of uplink data. It should be noted that the amount of uplink data indicated by the first BSR may refer to the amount of uplink data that the first IAB node will send to the second IAB node, and further, it may be the amount of uplink data that has been cached in the first IAB node. The amount of upstream data.
  • the first BSR is carried in a first BSR medium access control (medium access control, MAC) control element (CE), and the first BSR MAC CE is used to determine a third IAB node, or the first BSR
  • the MAC subheader corresponding to a BSR MAC CE is used to determine the third IAB node, the third IAB node is the parent node of the second IAB node, and the third IAB node transmits for the second IAB node The next hop node of the uplink data.
  • the first IAB node may determine the third IAB node, and indicate the third IAB node through the MAC subheader corresponding to the first BSR MAC CE or the first BSR MAC CE, and then report to the second IAB node.
  • the IAB node sends the first BSR MAC CE including the first BSR, so that the second IAB node determines the third IAB node according to the MAC subheader corresponding to the first BSR MAC CE or the first BSR MAC CE.
  • How the first IAB node specifically determines the third IAB node is not limited in this embodiment of the application.
  • the first IAB node may obtain routing configuration information from the second IAB node to the parent node of the second IAB node; for example, the first IAB node may obtain the routing configuration information through an IAB host.
  • the first IAB node may determine the third IAB node from the routing configuration information from the second IAB node to the parent node of the second IAB node according to the BAP address corresponding to the uplink data to be sent to the second IAB node. Or the first IAB node may determine the first IAB node from the routing configuration information from the second IAB node to the parent node of the second IAB node according to the BAP address and routing path information corresponding to the uplink data to be sent to the second IAB node Three IAB nodes.
  • Step 303 The second IAB node receives the first BSR from the first IAB node.
  • Step 304 The second IAB node sends the second BSR to the third IAB node.
  • the second BSR is used to indicate the amount of uplink data.
  • the data volume of the uplink data indicated by the second BSR may refer to the data of the uplink data that the second IAB node will send to the third IAB node but the second IAB node has not yet received from the first IAB node the amount.
  • the data amount of uplink data indicated by the second BSR may be equal to the data amount of uplink data indicated by the first BSR, or may be greater or smaller than the data amount of uplink data indicated by the first BSR, which is not limited in this embodiment of the application.
  • the format of the second BSR may follow the format specified in the prior art, and the format of the second BSR may also be the same as the format of the first BSR, which is not limited in the embodiment of the present application.
  • the first IAB node indicates to the second IAB node the next hop node when the uplink data is at the second IAB node through the first BSR, so that when the second IAB node receives the first BSR, it can
  • the second BSR is sent to the next hop node of the second IAB node, instead of sending the second BSR until the uplink data is obtained as in the prior art, thereby improving the uplink data transmission efficiency and reducing the uplink data transmission delay.
  • the first BSR MAC CE or the MAC subheader corresponding to the first BSR MAC CE may be implemented in multiple ways, which will be described separately below.
  • the BSR is sent through a MAC control element (CE) in a medium access control (MAC) protocol data unit (protocol data unit, PDU).
  • MAC medium access control
  • PDU protocol data unit
  • One MAC PDU includes at least one MAC sub (sub) PDU, where one MAC sub PDU includes at least a MAC sub-header, and may also include content such as a MAC control element (CE).
  • the MAC CE in the MAC sub PDU is used to carry the BSR, the MAC CE can be referred to as the BSR MAC CE.
  • the format of the MAC subheader can be referred to as shown in FIG. 4.
  • R represents a reserved field
  • logical channel identification (logical channel identify, LCID) represents an LCID field, used to indicate the LCID corresponding to MAC SDU or MAC CE
  • L represents an L field, used to indicate MAC SDU or MAC
  • CE number of bytes
  • F represents the F field, which is used to indicate the length of the L field.
  • the first BSR is carried in the first BSR MAC CE, and the MAC subheader corresponding to the first BSR MAC CE may include first indication information, and the first indication information is used to indicate The third IAB node.
  • the first indication information may include at least one bit, and when the at least one bit included in the first indication information is a different state value, it may correspond to different parent nodes of the second IAB node.
  • the state value of at least one bit included in the first indication information is the state value corresponding to the third IAB node.
  • At least one bit included in the first indication information is a bit corresponding to the LCID field in the MAC subheader. Different LCIDs correspond to different parent nodes of the second IAB node.
  • the state value of at least one bit included in the first indication information is the value of the LCID corresponding to the third IAB node .
  • At least one bit included in the first indication information is a bit corresponding to a reserved field in the MAC subheader.
  • the second IAB node includes two parent nodes, the third IAB node and the fourth IAB node; when the value of the reserved field is 1, the first indication information is used to indicate the third IAB node; the value of the reserved field is 0 At this time, the first indication information is used to indicate the fourth IAB node, and other situations will not be repeated.
  • At least one bit included in the first indication information is a bit of a newly added field in the MAC subheader.
  • multiple newly added bits in the MAC subheader correspond to different parent nodes of multiple second IAB nodes respectively, and when the first indication information is used to indicate the third IAB node, among the multiple bits and The value of the bit corresponding to the third IAB node is 1, and the value of other bits is 0.
  • the format of the first BSR MAC CE can be adjusted accordingly.
  • the LCG field of the BSR MAC CE corresponds to at most one buffer size field.
  • any LCG field in the first BSR MAC CE corresponds to M buffer size fields, and the M
  • the buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • Data amount; j 1, 2...M; M is the number of parent nodes of the second IAB node, and M is an integer greater than or equal to 2.
  • the correspondence between M buffer size domains and M parent nodes may be the IAB host configuration. Or it can be pre-defined by the protocol. For example, when the IAB node is dual-connected, it can be defined that any LCG field corresponds to the first buffer size field corresponding to the parent node or the parent node where the main cell is located, and the second buffer size The domain corresponds to the secondary parent node or the parent node where the secondary cell is located.
  • the first BSR MAC CE may include at least one LCG domain, and the specific number of LCG domains included is determined according to actual conditions, and details are not described herein again.
  • the LCG field may refer to the LCG identification field or the LCG identification index field, which is specifically determined according to the format adopted by the first BSR MAC CE.
  • the LCG identifier field is used to indicate the LCG identifier
  • the LCG identifier index field is used to indicate the index value of the LCG identifier.
  • the second IAB node is IAB node 2, which includes two parent nodes, namely IAB node 3 and IAB node 4.
  • the LCG domain may refer to the LCG identification domain.
  • one LCG identification field corresponds to two buffer size fields.
  • IAB node 3 corresponds to IAB node 4 and the other corresponds to IAB node 4, which are used to indicate The data volume of the uplink data sent to the IAB node 3 and the IAB node 4 through the IAB node 2 in the IAB node 1 respectively.
  • the LCG identification field 1 corresponds to the buffer size field 1-1 and the buffer size field 1-2
  • the buffer size field 1-1 can correspond to the IAB node 3
  • the buffer size field 1-2 can be IAB node 4 corresponds.
  • the buffer size field 2-1 may correspond to the IAB node 3
  • the buffer size field 2-2 may correspond to the IAB node 4, and other cases can be deduced by analogy, and will not be repeated.
  • the value of the buffer size fields corresponding to 1 to M-1 among the M buffer size fields can be 0 or other preset values.
  • the IAB node 2 receives the first BSR of the IAB node 1, for the LCG identification domain 1, if all the uplink data in the LCG identification domain 1 is sent to the IAB node 3 through the IAB node 2, and no uplink data is sent to the IAB For node 4, the value of the buffer size 1-2 corresponding to the LCG identification domain 1 can be 0 or other preset values.
  • the second IAB node is IAB node 2, which includes two parent nodes, namely IAB node 3 and IAB node 4.
  • the LCG field may refer to the LCG identification index field.
  • any LCG identification index field of the air interface corresponding to IAB node 1 and IAB node 2 in Figure 6 one of the two corresponding buffer size fields corresponds to IAB node 3 and the other corresponds to IAB node 4, which are respectively used for Indicates the data volume of the uplink data sent to the IAB node 3 and the IAB node 4 through the IAB node 2 in the IAB node 1 respectively.
  • the buffer size field 1-1 corresponding to the LCG identification index field 1 may correspond to the IAB node 3
  • the buffer size field 1-2 corresponding to the LCG identification index field 1 may correspond to the IAB node 4.
  • the buffer size field 2-1 may correspond to the IAB node 3
  • the buffer size field 2-2 may correspond to the IAB node 4, and other cases can be deduced by analogy, and will not be repeated.
  • each LCG identification index field is displayed.
  • the LCG identification index field does not correspond to any buffer size field.
  • the value of the buffer size fields corresponding to 1 to M-1 among the M buffer size fields can be 0 or other preset values.
  • the IAB node 2 receives the first BSR of the IAB node 1, for the LCG identification index field 1, if all the uplink data in the LCG identification index field 1 is sent to the IAB node 3 through the IAB node 2, and no uplink data is sent To the IAB node 4, the value of the buffer size 1-2 corresponding to the LCG identifier index field 1 can be 0 or other preset values.
  • the first IAB node can simultaneously indicate to the second node the data volume of uplink data sent to multiple parent nodes of the second node through one BSR MAC CE. size.
  • the first BSR MAC CE may include M groups of LCG identification index fields, each group of LCG identification index fields includes K LCG identification index fields, K is an integer greater than 0, for example, K may be equal to 8 or 16, etc.; A group of LCG identification index fields in the M group of LCG identification index fields corresponds to one of the M parent nodes of the second IAB node, and M is the number of parent nodes of the second IAB node.
  • the correspondence between the M group LCG identification index domain and the M parent nodes may be an IAB host configuration. Or it can be pre-defined by the protocol. For example, when the IAB node is dual-connected, it can be defined that the first group of LCG identification index fields correspond to the primary parent node or the parent node where the primary cell is located, and the second set of LCG identification index fields correspond to the secondary parent node. Or corresponding to the parent node where the secondary cell is located.
  • any LCG identification index field in any group of LCG identification index fields in the M group of LCG identification index fields corresponds to at most one buffer size field.
  • the second IAB node is IAB node 2, which includes two parent nodes, namely IAB node 3 and IAB node 4, and the first BSR sent by the first node to the second node is as follows
  • the first BSR MAC CE in Figure 7 includes two sets of LCG index identification fields, corresponding to IAB node 3 and IAB node 4 respectively.
  • each LCG identification index field corresponds to at most one buffer size field.
  • the LCG identification index field when the value of the LCG identification index field is 1, it means that the LCG indicated by the LCG identification index field has uplink data to be transmitted, and the LCG identification index field may correspond to 1 buffer size field; when the LCG identification index field When the value of is 0, it means that the LCG indicated by the LCG identifier index field does not have uplink data to be transmitted, and can correspond to 0 buffer size fields.
  • each LCG identification index field is shown.
  • the LCG indicated by an LCG identification index field does not have uplink data to be transmitted, the LCG identification index The field does not correspond to any buffer size field.
  • the first IAB node can simultaneously indicate to the second node the data amount of uplink data sent to multiple parent nodes of the second node through one BSR MAC CE.
  • the first IAB node may first determine the third IAB node before sending the first BSR. In the fourth implementation manner, the first IAB node may not need to determine the third IAB node before sending the first BSR.
  • an IAB node when it obtains uplink data, it can determine the next hop node of the uplink data from the routing configuration information according to the BAP address in the BAP layer header corresponding to the uplink data. It should be noted that there may be multiple next-hop nodes determined by the BAP address. Because the uplink data is transmitted to the IAB host corresponding to the BAP address, there may be multiple routing paths, and different routing paths include different IAB nodes.
  • the first routing path can be IAB node 1 to IAB node 2, IAB node 2 to IAB node 3, and IAB node 3 to IAB host;
  • One routing path may be IAB node 1 to IAB node 4, IAB node 4 to IAB node 5, and IAB node 5 to IAB host.
  • the IAB node 1 can use the IAB node 2 as the next hop node or the IAB node 4 as the next hop node according to the BAP address of the IAB host.
  • the next hop node of the uplink data may be further determined by the routing path identifier.
  • the routing path identifier of the first routing path is routing path identifier 1
  • the routing path identifier of the second routing path is routing path identifier 2.
  • the IAB node 1 determines the BAP address, it also determines that the routing path identifier is the routing path identifier 1, and the IAB node uses the IAB node 2 as the next hop node.
  • the first BSR MAC CE sent by the first IAB node carries the BAP address of the IAB host of the first IAB node, and the second IAB node can thus determine the BAP address according to the BAP address. How to determine the third IAB node will not be repeated here.
  • the BAP address of the IAB host may be the BAP address of the IAB host CU or the BAP address of the IAB host DU.
  • the format of the first BSR MAC CE may be as shown in FIG. 8. Compared with the prior art, a BAP identification field is newly added in FIG. 8 to carry the BAP address.
  • the first BSR MAC CE may also include a routing path identifier, so that the second IAB node can determine the third IAB node according to the BAP address and the routing path identifier.
  • the format of the first BSR MAC CE may be as shown in Figure 8, where the BAP identification field is used to carry the BAP address and routing path identification.
  • the first IAB node may send the first BSR to the second IAB node using the foregoing implementation manner, or may use the BSR MAC CE format in the prior art to send the first BSR to the second IAB node.
  • the first IAB node uses the existing BSR MAC CE or the above-mentioned enhanced BSR MAC CE can be configured through the IAB host or the IAB host CU.
  • the methods and operations implemented by terminal devices can also be implemented by components (such as chips or circuits) that can be used in terminal devices, and the methods and operations implemented by network devices can also be Can be used for network equipment components (such as chips or circuits) to achieve.
  • each network element described above includes hardware structures and/or software modules corresponding to each function.
  • the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.
  • the device 900 may exist in the form of software or hardware.
  • the apparatus 900 may include: a processing unit 901 and a communication unit 902.
  • the communication unit 902 may include a receiving unit and a sending unit.
  • the processing unit 901 is used to control and manage the actions of the device 900.
  • the communication unit 902 is used to support communication between the device 900 and other network entities.
  • the processing unit 901 is configured to determine a second IAB node; the second IAB node is the parent node of the first IAB node;
  • the communication unit 902 is configured to send a first buffer status report BSR to the second IAB node; the first BSR is used to indicate the amount of uplink data, and the first BSR is carried in the first BSR media access control
  • the first BSR MAC CE is used to determine the third IAB node, or the MAC subheader corresponding to the first BSR MAC CE is used to determine the third IAB node, the third IAB node Is the parent node of the second IAB node, and the third IAB node is the next hop node for the second IAB node to transmit the uplink data.
  • the MAC subheader corresponding to the first BSR MAC CE includes first indication information
  • the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the communication unit is further configured to obtain routing configuration information from the second IAB node to the parent node of the second IAB node;
  • the processing unit is further configured to determine the third IAB node according to the routing configuration information.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • the communication unit 902 is configured to receive a first buffer status report BSR from a first IAB node; the first BSR is used to indicate the amount of uplink data, and the first BSR is carried in the first BSR media access control MAC control
  • the first BSR MAC CE is used to determine the third IAB node, or the MAC subheader corresponding to the first BSR MAC CE is used to determine the third IAB node, and the third IAB node is The parent node of the second IAB node, where the third IAB node is a next hop node for the second IAB node to transmit the uplink data;
  • the processing unit 901 is configured to determine the third IAB node
  • the communication unit 902 is configured to send a second BSR to the third IAB node.
  • the MAC subheader of the first BSR MAC CE includes first indication information
  • the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • FIG. 10 shows an apparatus 1000 provided by an embodiment of this application, and the apparatus shown in FIG. 10 may be a hardware circuit implementation of the apparatus shown in FIG. 9.
  • the communication device can be adapted to perform the function of the first core network element in the above method embodiment in the flowchart shown above.
  • FIG. 10 only shows the main components of the communication device.
  • the apparatus 1000 shown in FIG. 10 includes at least one processor 1001, for example, a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (digital signal processing, DSP), and an application specific integrated circuit (application specific integrated circuit). integrated circuits, ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of DSP and microprocessor, and so on.
  • the device 1000 may also include at least one memory 1002 for storing program instructions and/or data.
  • the memory 1002 is coupled with the processor 1001.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1001 may operate in cooperation with the memory 1002.
  • the processor 1001 may execute program instructions stored in the memory 1002. At least one of the at least one memory may be included in the processor.
  • the apparatus 1000 may further include a communication interface 1003 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1000 can communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.
  • the transceiver may be an independent receiver, an independent transmitter, a transceiver with integrated transceiver functions, or an interface circuit.
  • the device 1000 may further include a communication line 1004.
  • the communication interface 1003, the processor 1001, and the memory 1002 may be connected to each other through a communication line 1004;
  • the communication line 1004 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (extended industry standard architecture). , Referred to as EISA) bus and so on.
  • the communication line 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the processor 1001 is configured to determine a second IAB node; the second IAB node is the parent node of the first IAB node;
  • the communication interface 1003 is configured to send a first buffer status report BSR to the second IAB node; the first BSR is used to indicate the amount of uplink data, and the first BSR is carried in the first BSR media access control
  • the first BSR MAC CE is used to determine the third IAB node, or the MAC subheader corresponding to the first BSR MAC CE is used to determine the third IAB node, the third IAB node Is the parent node of the second IAB node, and the third IAB node is the next hop node for the second IAB node to transmit the uplink data.
  • the MAC subheader corresponding to the first BSR MAC CE includes first indication information
  • the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the communication interface 1003 is also used to obtain routing configuration information from the second IAB node to the parent node of the second IAB node;
  • the processor 1001 is further configured to determine the third IAB node according to the routing configuration information.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • the communication interface 1003 is configured to receive a first buffer status report BSR from a first IAB node; the first BSR is used to indicate the amount of uplink data, and the first BSR is carried in the first BSR media access control MAC control
  • the first BSR MAC CE is used to determine the third IAB node, or the MAC subheader corresponding to the first BSR MAC CE is used to determine the third IAB node, and the third IAB node is The parent node of the second IAB node, where the third IAB node is a next hop node for the second IAB node to transmit the uplink data;
  • the processor 1001 is configured to determine the third IAB node
  • the communication interface 1003 is used to send a second BSR to the third IAB node.
  • the MAC subheader of the first BSR MAC CE includes first indication information
  • the first indication information is used to indicate the third IAB node.
  • the first indication information includes at least one bit used to determine the third IAB node.
  • the at least one bit is a logical channel identifier LCID field.
  • the first BSR MAC CE includes at least one LCG domain, and any LCG domain in the at least one LCG domain corresponds to M buffer size domains; wherein, the M The buffer size field j in the buffer size field corresponds to the parent node j of the second IAB node, and the buffer size field j indicates what the second IAB node sends to the parent node j of the second IAB node.
  • the first BSR MAC CE includes an M group of LCG identification index fields, a group of LCG identification index fields in the M group of LCG identification index fields, and the M of the second IAB node
  • M is the number of parent nodes of the second IAB node.
  • the first BSR MAC CE includes the BAP address of the IAB host of the first IAB node, and the BAP address is used to determine the third IAB node.
  • the first BSR MAC CE further includes a routing path identifier, and the routing path identifier is used to determine the third IAB node.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.
  • a computer-usable storage media including but not limited to disk storage, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission de rapport d'état de mémoire tampon. Au cours dudit procédé, un premier nœud à accès et liaison intégrés, IAB, détermine un deuxième nœud IAB. Le deuxième nœud IAB est le nœud parent du premier nœud IAB. Le premier nœud IAB envoie un premier BSR au deuxième nœud IAB. Ledit premier BSR est utilisé pour indiquer la quantité de données de liaison montante. Le premier BSR est transporté dans un premier BSR MAC CE. Le premier BSR MAC CE est utilisé pour déterminer un troisième nœud IAB. En variante, un en-tête secondaire MAC correspondant au premier BSR MAC CE est utilisé pour déterminer le troisième nœud IAB. Le troisième nœud IAB est le nœud parent du deuxième nœud IAB. Le troisième nœud IAB est un nœud de saut suivant pour que le deuxième nœud IAB transmette les données de liaison montante.
PCT/CN2019/109620 2019-09-30 2019-09-30 Procédé et dispositif de transmission de rapport d'état de mémoire tampon WO2021062717A1 (fr)

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