WO2021160158A1 - 传输方法及网络设备 - Google Patents
传输方法及网络设备 Download PDFInfo
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- WO2021160158A1 WO2021160158A1 PCT/CN2021/076493 CN2021076493W WO2021160158A1 WO 2021160158 A1 WO2021160158 A1 WO 2021160158A1 CN 2021076493 W CN2021076493 W CN 2021076493W WO 2021160158 A1 WO2021160158 A1 WO 2021160158A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
Definitions
- the present invention relates to the field of communication technology, in particular to a transmission method and network equipment.
- IAB Integrated Access and Backhaul
- an IAB donor node can send downlink data to a user terminal (User Equipment, UE) through IAB node A, IAB node B, and IAB node C. If the backhaul link encounters link congestion, then IAB node B should send Flow Control Message to its upstream node (parent node), that is, IAB node A. After IAB node A receives the message, Flow control operations will be performed to alleviate congestion.
- UE User Equipment
- the prior art does not have a specific design solution for flow control information, which causes the IAB node to be unable to effectively notify the parent node of its congestion status, which further causes data packet loss and transmission delay.
- the embodiment of the present invention provides a transmission method and network equipment to solve the problem that the congestion situation cannot be effectively notified in the existing IAB network.
- the present invention is implemented as follows:
- an embodiment of the present invention provides a transmission method for a first IAB node, and the transmission method includes:
- the first field is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- an embodiment of the present invention also provides a transmission method for a second IAB node, and the transmission method includes:
- an embodiment of the present invention also provides a network device, the network device is a first network device, and the network device includes:
- the sending module is configured to send a first control PDU to a second network device, where the second network device is the parent node of the first network device, and the first control PDU includes a first field; the first field is used for In the BH RLC channel or BH RLC channel group or BH RLC channel section indicating congestion.
- the receiving module is configured to receive a first control PDU sent by a first network device, where the second network device is a parent node of the first network device, and the first control PDU includes a first field; the first field It is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- an embodiment of the present invention also provides a network device, including: a memory, a processor, and a program stored on the memory and running on the processor, the program being executed by the processor When realizing the steps in the transmission method as described in the first aspect.
- an embodiment of the present invention also provides a network device, including: a memory, a processor, and a program stored on the memory and running on the processor, the program being executed by the processor When realizing the steps in the transmission method as described in the second aspect.
- an embodiment of the present invention also provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program described in the first aspect The steps in the transmission method; or, when the computer program is executed by the processor, the steps in the transmission method as described in the second aspect are implemented.
- an embodiment of the present invention also provides a computer program product, wherein the program product is stored in a non-volatile storage medium, and the program product is executed by at least one processor to implement the above-mentioned The steps of the transmission method.
- an embodiment of the present invention also provides a network device, wherein the network device is used to execute the steps of the above-mentioned transmission method.
- the first IAB node (child node) sends the first control PDU to the second IAB node (parent node), and informs the second IAB node of the current congested BH through the first control PDU.
- RLC channel or BH RLC channel group or BH RLC channel interval In this way, the embodiment of the present invention provides a notification mechanism for downlink congestion in the IAB network, so that the upper-level node can learn the congestion status of its child nodes in time, and perform flow control operations, thereby reducing packet loss and transmission due to congestion. Time delay ensures the smooth data transmission between the base station and the user terminal.
- FIG. 1 is a flowchart of a transmission method provided by an embodiment of the present invention
- FIG. 2 is a schematic diagram of a scene of a network device applying the transmission method provided in FIG. 1;
- Figure 3a is a schematic diagram of a first control PDU in a transmission method provided by an embodiment of the present invention.
- FIG. 3b is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- FIG. 4a is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- 4b is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- 4c is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- FIG. 5a is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- FIG. 5b is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- FIG. 5c is another schematic diagram of the first control PDU in the transmission method provided by the embodiment of the present invention.
- Figure 6a is a schematic diagram of a second control PDU in a transmission method provided by an embodiment of the present invention.
- 6b is another schematic diagram of the second control PDU in the transmission method provided by the embodiment of the present invention.
- FIG. 7 is a flowchart of another transmission method provided by an embodiment of the present invention.
- Figure 8 is a structural diagram of a network device provided by an embodiment of the present invention.
- Figure 9 is a structural diagram of another network device provided by an embodiment of the present invention.
- Figure 10 is a structural diagram of another network device provided by an embodiment of the present invention.
- IAB Integrated Access and Backhaul
- an IAB node includes a distributed unit (Distributed Unit, DU) functional part and a mobile terminal (Mobile Termination, MT) functional part.
- DU distributed Unit
- MT Mobile Termination
- an access point i.e. IAB node
- IAB node can find an upstream access point (sub IAB node) and establish a wireless connection with the DU of the upstream access point. This wireless connection is called a backhaul link.
- the IAB node After an IAB node establishes a complete backhaul link, the IAB node turns on its DU function, and the DU will provide cell services, that is, the DU can provide access services for the UE.
- the DUs of all IAB nodes are connected to a Central Unit (CU) node, and this node configures the DU through the F1-AP protocol.
- the CU configures the MT through the RRC protocol; the donor IAB node has no MT function part, and the donor IAB node has a wired transmission network directly connected.
- the BAP layer has two basic functions. One is the routing function, that is, determining the transmission path and forwarding, sending the uplink data from the UE to the donor IAB node (ie CU) via the access IAB node, or sending the downlink data from the donor IAB node (ie CU) is sent to the access IAB node, and then sent to the UE by the access IAB node; the second is the signaling/data bearer (UE SRB/DRB) mapping function (bearer mapping), that is, the signaling radio bearer (Signaling Radio bearer) of the UE Bearer, SRB)/Data Radio Bearer (Date Radio Bearer, DRB) is mapped to the Radio Link Control (RLC) channel of the backhaul link, and currently supports multiple UEs SRB/DRB mapping to one backhaul link On the RLC channel, it also supports mapping of a UE
- RLC Radio Link Control
- the BAP entity in an IAB node can be divided into two parts, the MT part and the DU part: the MT part receives downlink data from the upstream link and sends the received data to the upper protocol layer or forwards to the DU part of the BAP entity, or The received uplink data forwarded by the DU part of the BAP entity is mapped to the selected upstream link RLC channel, and the data is sent; the DU part of the BAP entity receives the uplink data from the downstream link and sends the data to the upper protocol layer Or forward to the MT part of the BAP entity, or map the received data from the MT of the BAP entity to the RLC channel of the selected downstream link, and send the data.
- BAP protocol data unit Protocol Data Unit
- PDU Protocol Data Unit
- BAP PDU is also used to transmit control information, that is, PDU is divided into data PDU and control PDU.
- the format of the BAP control PDU has not been finalized.
- FIG. 1 is a flowchart of a transmission method according to an embodiment of the present invention, and the transmission method is used for a first IAB node. As shown in Figure 1, the transmission method includes the following steps:
- Step 101 Send a first control PDU to a second IAB node, where the second IAB node is the parent node of the first IAB node, and the first control PDU includes a first field, and the first field is used to indicate BH RLC channel or BH RLC channel group or BH RLC channel section where congestion occurs.
- the first IAB node is also a child node of the second IAB node, and the first IAB node can send the first control to its parent node (that is, the second IAB node) in the event of congestion. PDU.
- the link capacity of the BH link from the IAB node to the child node may be less than the capacity of the backhaul (BH) link from the IAB node to the parent node, and the parent node may not I don't know the downstream cache status of the child node. Therefore, the ingress data rate of an IAB node (scheduled by its parent node) may be greater than its egress data rate (scheduled by its own node to its child nodes), resulting in downlink congestion.
- BH backhaul
- the specific embodiment of the present invention provides a notification mechanism for the above possible downlink congestion, so that the upper-level node can learn the congestion status of its child nodes in time, and perform flow control operations to reduce packet loss and transmission due to congestion. Time delay.
- the first control PDU includes a first field used to indicate a BH RLC channel, a BH RLC channel group, or a BH RLC channel interval where congestion occurs.
- the channel group whether it is congested or not can be judged according to a certain strategy.
- whether it is congested or not can be set according to different standards. For example, if all BH RLC channels in the BH RLC channel group are congested, then the BH RLC channel group is considered to be congested, but it can also occur in the BH RLC channel group. When the congested BH RLC channel exceeds a certain proportion or a certain number, it can be considered that the BH RLC channel group is congested.
- the BH RLC channel interval includes at least one BH RLC channel, the specific number of which is dynamically determined by the IAB node.
- the BH RLC channel interval in which congestion occurs is dynamically determined and indicated by the first IAB node.
- the first IAB node can also notify the second IAB node of the BH RLC channel or BH RLC channel group or BH RLC channel section where congestion is currently occurring. Or in other words, by sending the first control PDU, the parent IAB node can be effectively notified of the congestion of its child IAB node, so that the parent IAB node can take the blank operation in time to avoid data loss or transmission delay, and ensure Smooth data transmission between the base station and the user terminal.
- the IAB donor node can send downlink data to the UE through IAB node A, IAB node B, and IAB node C.
- IAB node B When the data transmission between IAB node B and IAB node C is blocked, then IAB node B will send it to it.
- the upstream node of the IAB node A sends a control PDU (that is, the first control PDU in the embodiment of the present invention); and the data transmission between the IAB node B and the IAB node C is blocked, and the essence is that the IAB node B receives Yes, the ingress data sent by IAB node A is more than the egress data sent to IAB node C, causing congestion.
- a control PDU that is, the first control PDU in the embodiment of the present invention
- the IAB node B can notify the IAB node A in which BH RLC channel, BH RLC channel group, or BH RLC channel section to perform flow control through the first control PDU.
- the IAB node A can learn the current congestion situation, and then the IAB node A can perform flow control in the corresponding BH RLC channel, BH RLC channel group, or BH RLC channel interval, for example, stop Downlink data transmission or reduce the downlink data transmission rate, etc., to avoid data loss or transmission delay caused by link congestion.
- the first IAB node may also be used to determine the indication format of the BH RLC channel interval.
- the format of the first field included in the first control PDU may be determined to include the first BH RLC channel of the congested BH RLC channel interval. Identification information and identification information of the last BH RLC channel; etc.
- the congested BH RLC channel or BH RLC channel group or BH RLC channel interval can be described in a fixed format, or can be described in a different format, such as a bitmap format description, or a BH RLC channel identifier/BH RLC channel group identifier description can also be described in other ways. This will be explained in detail later.
- the specific embodiment of the present invention should also indicate the format information so that the second IAB node can correctly parse The corresponding description data.
- the first control PDU may further include a second field, and the second field is used to indicate the format of the first field.
- the number of bits in the second field can be set as required, and the number of bits is greater than or equal to 2.
- the second field can first indicate whether the first control PDU is a BH RLF notification PDU or an FC PDU.
- the second field can also indicate the description format of the BH RLC channel or the BH RLC channel group or the BH RLC channel interval through different assignments.
- a value of 00001 indicates that the first control PDU is a BH RLF notification PDU
- a value of 00010 indicates that the first control PDU is a FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated by the first format
- the value 00011 indicates that the first control PDU is an FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated by the second format, and so on.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format is described in a bitmap manner, that is, the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to In an indicator bit; the N is greater than or equal to the number of BH RLC channels or BH RLC channel groups between the first IAB node and the second IAB node;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the BH RLC channel group is configured by the network (pre-) or defined by the protocol (pre-), or can be determined in real time according to a certain strategy, and the parent node (that is, the second IAB node in the embodiment of the present invention) is notified.
- each BH RLC channel or BH RLC channel group corresponds to one indicator bit.
- N is greater than or equal to 8.
- the first field is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs.
- the identification information may be the identity (ID) information of the BH RLC channel where the congestion occurs, such as the unique channel number carried by the BH RLC channel to distinguish its identity; the identification information may also be the congestion The ID of the BH RLC channel group, that is, the unique channel number carried by the BH RLC channel group for distinguishing its identities, etc.
- the first field is used to indicate the BH RLC channel interval where congestion occurs.
- the congested BH RLC channel interval can be divided into different standards, for example, several consecutive BH RLC channels that are congested can be divided into one interval, and finally each congested BH RLC channel interval is indicated; another example
- all BH RLC channels can be divided into one channel interval when the congested BH RLC channel exceeds a certain percentage.
- the congested BH RLC channel can be continuous or It may not be continuous, which can effectively reduce the number of intervals and reduce overhead.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the congested BH RLC channel interval;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, that is, includes the identification information of the first BH RLC channel and the identification of the last BH RLC channel in the congested BH RLC channel interval information.
- the BH RLC channel includes unique identification information for distinguishing its identity, such as channel number; the channel number corresponding to the BH RLC channel between the first IAB node and the second IAB node may follow specific rules, such as the first The channel number corresponding to each BH RLC channel is 1, and the channel number corresponding to the second BH RLC channel is 2, arranged in sequence; and then the second IAB node receives the first control PDU, according to the first one included in the first field.
- the channel number of the BH RLC channel and the channel number of the last BH RLC channel can also know the BH RLC channel interval where congestion occurs. In this way, the first control PDU does not need to include the identification information of each BH RLC channel where congestion occurs, which can effectively reduce the overhead of the first control PDU.
- the first field of the third format includes a first identification field and a quantity field, that is, includes identification information of the first BH RLC channel of the BH RLC channel section where congestion occurs and the number of channels included in the BH RLC channel section .
- the quantity field is 5, and the second IAB node, after receiving the first control PDU, according to the congested BH RLC channel interval included in the first field.
- the first field of the third format may be dynamically determined by the first IAB node. That is to say, in the case that the first field includes the third format, the first field may include the first identification field and the second identification field, or may also include the first identification field and the quantity field, and its specific value It may be dynamically determined by the first IAB node according to the current channel state.
- the method used can also be determined dynamically. For example, when the number of congested BH RLC channel intervals exceeds the preset number, the first field includes the first identification field and the second identification field, and the number of congested BH RLC channel intervals is less than the preset number. In the case of quantity, the first field includes the first identification field and the quantity field.
- whether the format of the first field is the first format, the second format, or the third format may be determined according to a certain evaluation criterion.
- it can be a combination of the number of downlink BH RLC channels or BH RLC channel groups between the first IAB and the second IAB and the downlink BH RLC channels or BH RLC channel groups where congestion occurs between the first IAB and the second IAB The number of to determine the format of the first field.
- the format of the first field is the first format .
- the first predetermined number may be a small value; that is, when the number of downlink BH RLC channels or BH RLC channel groups between the first IAB and the second IAB is small, the The first field of the first control PDU may adopt the first format, that is, the first field includes N indicator bits for indicating the congestion state.
- the overhead of using bitmaps is acceptable to the system, so the first field can be described by bitmaps .
- the format of the first field is the second format .
- the first predetermined number may be the same value as the first predetermined number, or it may be another smaller value; then, when the downlink BH RLC channel or BH channel between the first IAB and the second IAB
- the first field of the first control PDU may adopt the second format, that is, the first field includes identification information or BH RLC channel used to indicate the congested BH RLC channel The identification information of the group.
- the format of the first field is the third format.
- the first field of the first control PDU may adopt the third format, that is, the first field includes It is used to indicate the BH RLC channel interval in which congestion occurs. The specific form of the first field of the third format has been described above, and will not be repeated here.
- the overhead of using the bitmap method may be relatively large.
- the other two formats can be used for description. That is, directly transmit the identification information of the congested BH RLC channel or the identification information of the BH RLC channel group, or directly transmit the description information of the congested BH RLC channel interval (that is, the first and last ID of the interval, or the first ID combined quantity information) .
- the above strategies can be used in combination, that is, when the number of downlink BH RLC channels or BH RLC channel groups between the first IAB and the second IAB is small (that is, less than or equal to the first predetermined number), then The format of the first field is the first format; when the number of downlink BH RLC channels or BH RLC channel groups between the first IAB and the second IAB is large (that is, greater than or equal to the first predetermined number), then The format of the first field is the second format or the third format.
- Which format is used can be determined by the data size of the first control PDU to be sent; if the format of the first field is the second In the format, the data volume of the first control PDU is smaller, the first field adopts the second format; if the format of the first field is the third format, the data volume of the first control PDU is smaller, then the first field adopts the second format Three formats.
- the determination of the first field format can also be judged by the number of BH RLC channels or BH RLC channel groups that are congested between the first IAB and the second IAB; then, regardless of the number of the first IAB and the second IAB, Whether the number of downlink BH RLC channels or channel groups between the second IAB is large or small is not a criterion for judging the format of the first field.
- the format of the first field is the second format; that is, the first field includes instructions for indicating The identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs.
- the format of the first field is the first format.
- the first format is used, that is, the first field includes N numbers for indicating congestion status. Indicating bit.
- the format of the first field is the third format.
- the first field adopts the third format, and the data volume of the first control PDU is smaller.
- the first field includes the BH RLC channel interval used to indicate the occurrence of congestion.
- the above several methods for determining the format of the first field may also be implemented in combination.
- the first field can be Use the second format; when the number of downlink BH RLC channels or BH RLC channel groups between the first IAB and the second IAB is large, and the number of BH RLC channels or BH RLC channel groups that are congested in between is also large, Then the first field can adopt the third format.
- the first IAB can select the format with the least overhead according to the data volume of the first control PDU in different ways, but in order to simplify the implementation complexity, it can also be described in a fixed format, which is not specifically limited here.
- both format 2 and format 3 need to use the identification information of the BH RLC channel, and the identification information of the BH RLC channel has different formats.
- the following further explains how to determine the format of the identification information of the BH RLC channel as follows .
- the value of the BH RLC channel in the first field is equal to the length of the identification information in the eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the BH RLC channel in the downlink BH RLC channel between the first IAB and the second IAB, as long as there is a BH RLC channel configured to use the extended logical channel IDentity (eLCID), if congestion occurs, the BH RLC channel
- eLCID extended logical channel IDentity
- the BH RLC channel The channel originally used the LCID format, and the logical channel identifier of the LCID format was filled to 16 bits by adding 0 to the high bit.
- the congested BH RLC channel originally used the eLCID format, it can remain unchanged.
- the first 6 bits must be used to indicate that the eLCID format is used. Assuming that the value indicated by the first 6 bits is 51 (that is, 110011), it indicates that the eLCID format is used.
- the identification information of the LCID format is 6 bits, and the identification information of the eLCID format is 16 bits. That is to say, the logical channel (Logical Channel, LCH) number that the LCID format can represent is up to 32 (wherein the code of 1-32 is used) In the LCH number, other values are temporarily reserved or used for medium access control (Medium Access Control, MAC) control element (Control element, CE) and other instructions).
- LCH Logical Channel
- the identification information of the congested BH RLC channel included in the first field is configured in the eLCID format, if one of the congested BH RLC channels
- the original configuration is the LCID format, and the first 10 most significant bits (MSBs) are filled with 0, that is, the leftmost 10 bits are filled with 0, so as to fill the 16-bit eLCID space.
- the identification information of the congested BH RLC channel included in the first field is configured in the LCID format.
- the first control PDU may further include a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU may indicate whether the identification information of the congested BH RLC channel included in the third field is eLCID format or LCID format; or may also indicate the congested BH RLC via the second field. Whether the identification information of the channel is in eLCID format or LCID format, in this embodiment, only the definition of the second field needs to be changed, and the first control PDU does not need to add additional fields, thereby reducing the complexity of the first control PDU. The technical realization is simpler.
- an assignment of 00001 indicates that the first control PDU is a BH RLF notification PDU
- an assignment of 00010 indicates that the first control PDU is an FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated by the first format
- Assignment 00011 indicates that the first control PDU is FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated in the second format
- the identification information of the BH RLC channel is in the eLCID format
- the assignment 00100 indicates the first control
- the PDU is an FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated by the second format
- the identification information of the BH RLC channel is in the LCID format, and so on.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes a fourth field, so that the second IAB node (that is, the parent node) can be notified through the fourth field of the remaining buffer or expected buffer size of the first IAB node, so that the first IAB node 2.
- the IAB node can adjust the sending of downlink data in a targeted manner. For example, when the remaining buffer of the first IAB node is small, the second IAB node can stop sending downlink data to the first IAB node to avoid data loss.
- the first control PDU may further include at least one fifth field, so that the second IAB node can be notified through the fifth field of the remaining buffer or expected buffer of the BH RLC channel or BH RLC channel group currently congested
- the size in turn, enables the second IAB node to adjust the amount of downlink data sent on the congested BH RLC channel or BH RLC channel group, for example, reduce or stop the amount of downlink data sent.
- the first control PDU may also include at least one sixth field, so that the second IAB node can be notified through the sixth field of the remaining buffer or the expected buffer size of the BH RLC channel section where congestion is currently occurring, and then This enables the second IAB node to adjust the amount of downlink data sent on the congested BH RLC channel interval, for example, reduce or stop the amount of downlink data sent.
- the above setting of the remaining buffer or the desired buffer size enables the first IAB to provide more flow control parameters for the second IAB, which can improve the accuracy and flexibility of flow control.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel section, and is used to indicate the expected received data of the corresponding BH RLC channel section where the congestion occurs. rate.
- the first control PDU can also inform the second IAB node through the seventh field of the expected receiving data rate of the current congested BH RLC channel interval, and the second IAB node can also report on the congested BH RLC channel interval.
- the sending rate of the downlink data is adjusted accordingly to optimize the data transmission efficiency between the second IAB node and the first IAB node.
- the first field included in the first control PDU is a first format, and the first control PDU uses a bitmap to indicate a BH RLC channel currently congested.
- the first control PDU includes N BH RLC channels currently congested, and the current remaining buffer or expected buffer size of the first IAB node; among them, D/C is used to identify the type of PDU is control PDU is still data PDU, R is reserved field, each BH RLC channel or BH RLC channel group in the first IAB node and the second IAB node corresponds to an indicator bit (B0, B1, B2...BN ).
- N is greater than or equal to 32; in this embodiment, the coding unit is 8 bits.
- the first IAB node when a BH RLC channel is congested, can set the corresponding position of the BH RLC channel in the Bitmap to 1 to indicate that the BH RLC channel is congested; and when the congestion of a BH RLC channel is removed, the first IAB node The corresponding position of the BH RLC channel in the Bitmap can be set to 0, indicating that the BH RLC channel is free of congestion.
- the first field included in the first control PDU is in the first format, and the first control PDU uses Bitmap to indicate the BH RLC channel group currently congested.
- the first control PDU includes M BH RLC channel groups currently congested, and the current remaining buffer or expected buffer size of the first IAB node; where D/C is used to identify the type of PDU Control PDU or data PDU, R is a reserved domain (not described in the following embodiments), each BH RLC channel group in the first IAB node and the second IAB node corresponds to an indicator bit (B0, B1, B2... ...BM), where M is greater than or equal to 8.
- the first IAB node when a BH RLC channel group is congested, can set the corresponding position of the BH RLC channel group in the Bitmap to 1 to indicate that the BH RLC channel group is congested; and when the congestion of a BH RLC channel group is lifted, The first IAB node may set the corresponding position of the BH RLC channel group in the Bitmap to 0, indicating that the congestion of the BH RLC channel group is released.
- the first field included in the first control PDU is in the second format, and the first control PDU includes the current The identification information of all congested BH RLC channels, and the identification information of the congested BH RLC channel adopts the LCID format (a BH RLC channel uses 6 bits); as shown in Figure 4a, the first control PDU includes the first congested BH The identification information of the RLC channel, up to the identification information of the last congested BH RLC channel, and also includes the current remaining buffer or expected buffer size of the first IAB node.
- the first field included in the first control PDU is in the second format, and the first control PDU includes the current The identification information of all congested BH RLC channels, and the identification information of the congested BH RLC channel adopts the eLCID format (a BH RLC channel uses 16 bits); as shown in Figure 4b, the first control PDU includes the first congested BH The identification information of the RLC channel, up to the identification information of the last congested BH RLC channel, and also includes the current remaining buffer or expected buffer size of the first IAB node.
- the first field included in the first control PDU is in the second format, and the first control PDU includes the current The identification information of all the congested BH RLC channel groups, and the identification information of the congested BH RLC channel uses the eLCID format (a BH RLC channel group uses 3 bits); as shown in Figure 4c, the first control PDU includes the first congestion The identification information of the BH RLC channel group up to the identification information of the last congested BH RLC channel group, as well as the current remaining buffer or expected buffer size of each congested BH RLC channel group.
- the first field included in the first control PDU is in the third format, that is, the first control PDU includes the BH RLC channel interval currently congested.
- the first control PDU indicates that there are multiple BH RLC channel intervals that are currently congested.
- Each group of channel intervals includes the identification information of the first BH RLC channel in the congested channel interval and the last BH.
- the identification information of the RLC channel, and the size of the remaining buffer or expected buffer in the channel interval; among them, the identification information of the BH RLC channel that is congested adopts the LCID format.
- the first field included in the first control PDU is in the third format, that is, the first control PDU includes the BH RLC channel interval currently congested.
- the first control PDU indicates that there are multiple BH RLC channel sections that are currently congested.
- Each group of channel sections includes the identification information of the first BH RLC channel that is congested in the channel section and the channel section.
- the number of BH RLC channels in which congestion occurs, and the remaining buffer or expected buffer size in the channel interval; among them, the identification information of the BH RLC channel in which congestion occurs adopts the eLCID format.
- the first control PDU may also include information used to indicate the destination address of the data transmission, and used to indicate the information that needs to be passed from the current node to the destination node.
- Path node information (Path ID), and also includes the expected received data rate used to indicate the corresponding BH RLC channel section where congestion occurs; other information included in the first control PDU may refer to that in the sixth embodiment above Description, I won’t repeat it here.
- the data PDU and the control PDU can adopt the same data structure design, which reduces the implementation complexity.
- step 101 it may further include:
- the second IAB node can learn the current congestion situation according to the first control PDU, and then reduce the traffic to the first IAB node accordingly.
- the transmission parameters such as the transmission volume, transmission rate, and transmission time interval of the sent downlink data; then, when the link congestion is removed, the first IAB node can send a second control PDU to the second IAB node to notify the second IAB node
- the congestion of the IAB node is relieved, so that the second IAB node can correspondingly increase the transmission parameters such as the transmission volume and transmission rate of the downlink data sent to the first IAB node, so as to improve the data between the second IAB node and the first IAB node. Transmission efficiency.
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- the first control PDU sent by the first IAB node and the second control PDU sent when the congestion is removed both include the same field, which is in the first control PDU sent when the congestion occurs.
- the format used to indicate the BH RLC channel or the BH RLC channel group or the BH RLC channel section where congestion occurs is used to indicate the congestion release in the second control PDU sent when the congestion is released.
- the second control PDU includes the eighth field, which does not include any BH RLC channel information, and only the field assignment is used to indicate congestion release.
- an assignment of 00001 indicates that the first control PDU is a BH RLF notification PDU
- an assignment of 00010 indicates that the first control PDU is an FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated by the first format
- Assignment 00011 indicates that the first control PDU is FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated in the second format
- the identification information of the BH RLC channel is in the eLCID format
- the assignment 00100 indicates the first control
- the PDU is an FC PDU
- the congested BH RLC channel or BH RLC channel group is indicated in the second format
- the identification information of the BH RLC channel is in the LCID format
- the assignment of 10000 indicates that the first control PDU is FC PDU, And indicate that the congestion is lifted.
- the second control PDU may also include congestion indication information to indicate that the congestion is removed.
- the first method can reuse the field format design of the first control PDU, which can reduce the implementation complexity.
- the first field does not need to be sent in the control PDU indicating the congestion release, so as to reduce the amount of data sent.
- the first IAB node (child node) sends the first control PDU to the second IAB node (parent node), and informs the second IAB node of the current congested BH through the first control PDU.
- RLC channel or BH RLC channel group or BH RLC channel interval In this way, the embodiment of the present invention provides a notification mechanism for downlink congestion in the IAB network, so that the upper-level node can learn the congestion status of its child nodes in time, and perform flow control operations, thereby reducing packet loss and transmission due to congestion. Time delay ensures the smooth data transmission between the base station and the user terminal.
- FIG. 7 is a flowchart of another transmission method according to an embodiment of the present invention.
- the transmission method is used for the second IAB node. As shown in Figure 7, the transmission method includes the following steps:
- Step 701 Receive a first control PDU sent by a first IAB node, where the second IAB node is the parent node of the first IAB node, and the first control PDU includes a first field; the first field is used for Indicates the BH RLC channel or BH RLC channel group or BH RLC channel section where congestion occurs.
- the BH RLC channel interval is dynamically determined by the first IAB node.
- the first control PDU further includes a second field, and the second field is used to indicate the format of the first field.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to one indicator bit; the N is greater than or equal to the first IAB node and The number of BH RLC channels or BH RLC channel groups between the second IAB nodes;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the congested BH RLC channel interval;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the format of the first field is the first format ;
- the format of the first field is the second format
- the format of the first field is the third format
- the format of the first field is the second format
- the format of the first field is the first format
- the format of the first field is the third format.
- the identification information of the BH RLC channel in the first field The length of is equal to the length of the identification information in eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the first control PDU further includes a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel section, and is used to indicate the expected received data of the corresponding BH RLC channel section where the congestion occurs. rate.
- the transmission method further includes:
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- this embodiment is used as an implementation manner on the second IAB node side corresponding to the embodiment shown in FIG. Note that this embodiment will not be repeated.
- the second IAB node receives the first control PDU sent by the first IAB node (child node), and then the second IAB node can learn the current congested BH RLC channel or BH RLC channel group Or BH RLC channel interval, so that the second IAB node can take effective countermeasures according to the congestion situation to avoid data loss or transmission delay, so as to ensure the smooth data transmission between the base station and the user terminal.
- FIG. 8 is a structural diagram of a network device according to an embodiment of the present invention, and the network device is a first network device. As shown in FIG. 8, the network device 800 includes:
- the sending module 801 is configured to send a first control PDU to a second network device, where the second network device is the parent node of the first network device, and the first control PDU includes a first field; the first field It is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- the BH RLC channel interval is dynamically determined by the first IAB node.
- the first control PDU further includes a second field, and the second field is used to indicate the format of the first field.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to one indicator bit; the N is greater than or equal to the first IAB node and The number of BH RLC channels or BH RLC channel groups between the second IAB nodes;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the congested BH RLC channel interval;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the format of the first field is the first format ;
- the format of the first field is the second format
- the format of the first field is the third format
- the format of the first field is the second format
- the format of the first field is the first format
- the format of the first field is the third format.
- the identification information of the BH RLC channel in the first field The length of is equal to the length of the identification information in eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the first control PDU further includes a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel interval, and is used to indicate the expected received data of the corresponding congested BH RLC channel interval. rate.
- the sending module 801 is further configured to:
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- the network device 800 provided by the embodiment of the present invention can implement each process that can be implemented by the first IAB node in the method embodiment shown in FIG.
- FIG. 9 is a structural diagram of a network device according to an embodiment of the present invention, and the network device is a second network device. As shown in FIG. 9, the network device 900 includes:
- the receiving module 901 is configured to receive a first control PDU sent by a first network device, where the second network device is a parent node of the first network device, and the first control PDU includes a first field;
- the field is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- the BH RLC channel interval is dynamically determined by the first IAB node.
- the first control PDU further includes a second field, and the second field is used to indicate the format of the first field.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to one indicator bit; the N is greater than or equal to the first IAB node and The number of BH RLC channels or BH RLC channel groups between the second IAB nodes;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the BH RLC channel interval where congestion occurs;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the format of the first field is the first format ;
- the format of the first field is the second format
- the format of the first field is the third format
- the format of the first field is the second format
- the format of the first field is the first format
- the format of the first field is the third format.
- the identification information of the BH RLC channel in the first field The length of is equal to the length of the identification information in eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the first control PDU further includes a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel section, and is used to indicate the expected received data of the corresponding BH RLC channel section where the congestion occurs. rate.
- the receiving module 901 is further configured to:
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- network device 900 provided by the embodiment of the present invention can implement the various processes that can be implemented by the second IAB node in the method embodiment described in FIG. Go into details again.
- FIG. 10 is a structural diagram of another network device provided by an embodiment of the present invention, and the network device is a first network device.
- the network device 1000 includes: a processor 1001, a transceiver 1002, a memory 1003, and a bus interface, where:
- the transceiver 1002 is configured to send a first control PDU to a second network device, where the second network device is the parent node of the first network device, and the first control PDU includes a first field; the first field It is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- the BH RLC channel interval is dynamically determined by the first IAB node.
- the first control PDU further includes a second field, and the second field is used to indicate the format of the first field.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to one indicator bit; the N is greater than or equal to the first IAB node and The number of BH RLC channels or BH RLC channel groups between the second IAB nodes;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the congested BH RLC channel interval;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the format of the first field is the first format ;
- the format of the first field is the second format
- the format of the first field is the third format
- the format of the first field is the second format
- the format of the first field is the first format
- the format of the first field is the third format.
- the identification information of the BH RLC channel in the first field The length of is equal to the length of the identification information in eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the first control PDU further includes a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel section, and is used to indicate the expected received data of the corresponding BH RLC channel section where the congestion occurs. rate.
- the transceiver 1002 is also used for:
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- the network device 1000 provided by the embodiment of the present invention can implement the various processes that can be implemented by the first IAB node in the method embodiment shown in FIG.
- the transceiver 1002 is configured to receive and send data under the control of the processor 1001, and the transceiver 1002 includes at least two antenna ports.
- the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1001 and various circuits of the memory represented by the memory 1003 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
- the bus interface provides the interface.
- the transceiver 1002 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium.
- the user interface 1004 may also be an interface capable of connecting externally and internally with the required equipment.
- the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
- the processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 can store data used by the processor 1001 when performing operations.
- FIG. 11 is a structural diagram of another network device provided by an embodiment of the present invention, and the network device is a second network device.
- the network device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, and a bus interface, where:
- the transceiver 1102 is configured to receive a first control PDU sent by a first network device, where the second network device is a parent node of the first network device, and the first control PDU includes a first field;
- the field is used to indicate the congested BH RLC channel or BH RLC channel group or BH RLC channel interval.
- the BH RLC channel interval is dynamically determined by the first IAB node.
- the first control PDU further includes a second field, and the second field is used to indicate the format of the first field.
- the format of the first field includes at least one of a first format, a second format, and a third format
- the first field of the first format includes N indicator bits for indicating the congestion state, and each BH RLC channel or BH RLC channel group corresponds to one indicator bit; the N is greater than or equal to the first IAB node and The number of BH RLC channels or BH RLC channel groups between the second IAB nodes;
- the first field of the second format is used to indicate the identification information of the BH RLC channel or the identification information of the BH RLC channel group where congestion occurs;
- the first field of the third format is used to indicate the BH RLC channel section where congestion occurs.
- the first field of the third format includes a first identification field and a second identification field, or includes a first identification field and a quantity field;
- the first identification field is used to indicate the identification information of the first BH RLC channel in the congested BH RLC channel interval;
- the second identification field is used to indicate the identification information of the last BH RLC channel in the congested BH RLC channel interval;
- the number field is used to indicate the number of channels included in the BH RLC channel section where congestion occurs.
- the format of the first field is the first format ;
- the format of the first field is the second format
- the format of the first field is the third format
- the format of the first field is the second format
- the format of the first field is the first format
- the format of the first field is the third format.
- the identification information of the BH RLC channel in the first field The length of is equal to the length of the identification information in eLCID format;
- the identification information of the BH RLC channel in the first field is in an LCID format.
- the first control PDU further includes a third field, and the third field is used to indicate the format of the identification information of the BH RLC channel;
- the second field is also used to indicate the format of the identification information.
- the first control PDU further includes a fourth field, where the fourth field is used to indicate the size of the remaining buffer or the expected buffer of the first IAB node;
- the first control PDU also includes at least one fifth field, and each fifth field corresponds to a congested BH RLC channel or BH RLC channel group, and is used to indicate the remaining buffer of the corresponding BH RLC channel or BH RLC channel group Or expected cache size;
- the first control PDU further includes at least one sixth field, and each sixth field corresponds to a congested BH RLC channel interval, and is used to indicate the remaining buffer or expected buffer size of the corresponding BH RLC channel interval in which congestion occurs.
- the first control PDU further includes at least one seventh field, and each seventh field corresponds to a congested BH RLC channel section, and is used to indicate the expected received data of the corresponding BH RLC channel section where the congestion occurs. rate.
- the transceiver 1102 is also used for:
- the second control PDU further includes an eighth field, which is used to indicate congestion release
- the first control PDU further includes a second field
- the second field is used to indicate the format of the first field.
- the eighth field and the second field belong to the same field.
- network device 1100 provided in the embodiment of the present invention can implement the various processes that can be implemented by the second IAB node in the method embodiment described in FIG. Go into details again.
- the transceiver 1102 is configured to receive and send data under the control of the processor 1101, and the transceiver 1102 includes at least two antenna ports.
- the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1101 and various circuits of the memory represented by the memory 1103 are linked together.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
- the bus interface provides the interface.
- the transceiver 1102 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
- the user interface 1104 may also be an interface capable of connecting externally and internally with the required equipment.
- the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
- the processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 can store data used by the processor 1101 when performing operations.
- an embodiment of the present invention also provides a network device, including a memory, a processor, and a program stored on the memory and running on the processor, and the program is executed when the processor is executed.
- a network device including a memory, a processor, and a program stored on the memory and running on the processor, and the program is executed when the processor is executed.
- the embodiment of the present invention also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium.
- a computer program is executed by a processor, each process in the embodiment of the transmission method as shown in FIG. 1 is implemented, and The same technical effect can be achieved; or, when the computer program is executed by the processor, each process in the embodiment of the transmission method as shown in FIG. 7 can be realized, and the same technical effect can be achieved. In order to avoid repetition, it will not be repeated here. Go into details.
- the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
- the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.
- a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.
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Abstract
Description
Claims (31)
- 一种传输方法,用于第一接入和回传一体化IAB节点,包括:向第二IAB节点发送第一控制协议数据单元PDU,所述第二IAB节点为所述第一IAB节点的父节点,所述第一控制PDU包括第一字段;所述第一字段用于指示发生拥塞的回传无线链路控制BH RLC信道或BH RLC信道组或BH RLC信道区间。
- 根据权利要求1所述的传输方法,其中,所述BH RLC信道区间由所述第一IAB节点动态确定。
- 根据权利要求1所述的传输方法,其中,所述第一控制PDU还包括第二字段,所述第二字段用于指示第一字段的格式。
- 根据权利要求3所述的传输方法,其中:所述第一字段的格式包括第一格式、第二格式和第三格式中的至少一种;所述第一格式的第一字段包括用于指示拥塞状态的N个指示位,每一个BH RLC信道或BH RLC信道组对应于一个指示位;所述N大于或等于所述第一IAB节点和第二IAB节点间的BH RLC信道或BH RLC信道组的数量;所述第二格式的第一字段用于指示发生拥塞的BH RLC信道的标识信息或BH RLC信道组的标识信息;所述第三格式的第一字段用于指示发生拥塞的BH RLC信道区间。
- 根据权利要求3所述的传输方法,其中:所述第三格式的第一字段包括第一标识字段和第二标识字段,或者包括第一标识字段和数量字段;所述第一标识字段用于指示发生拥塞的BH RLC信道区间的第一个BH RLC信道的标识信息;所述第二标识字段用于指示发生拥塞的BH RLC信道区间的最后一个BH RLC信道的标识信息;所述数量字段用于指示发生拥塞的BH RLC信道区间包含的信道的数量。
- 根据权利要求3所述的传输方法,其中:在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量 小于或等于第一预定数量的情况下,所述第一字段的格式为所述第一格式;或,在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量大于或等于第一预定数量的情况下,所述第一字段的格式为所述第二格式;或,在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量大于或等于第一预定数量的情况下,所述第一字段的格式为所述第三格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量小于或等于第二预定数量的情况下,所述第一字段的格式为所述第二格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量大于或等于第二预定数量的情况下,所述第一字段的格式为所述第一格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量大于或等于第二预定数量的情况下,所述第一字段的格式为所述第三格式。
- 根据权利要求3所述的传输方法,其中:在所述第一IAB和第二IAB之间的下行BH RLC信道中,存在被配置为使用扩展的逻辑信道标识eLCID的BH RLC信道的情况下,所述第一字段中的BH RLC信道的标识信息的长度等于eLCID格式的标识信息的长度;或,在所述第一IAB和第二IAB之间的下行BH RLC信道全部被配置为使用逻辑信道标识LCID的情况下,所述第一字段中的BH RLC信道的标识信息为LCID格式。
- 根据权利要求7所述的传输方法,其中:所述第一控制PDU还包括第三字段,所述第三字段用于指示所述BH RLC信道的标识信息的格式;或,在所述第一字段携带BH RLC信道的标识信息的情况下,所述第二字段 还用于指示所述标识信息的格式。
- 根据权利要求1-8中任意一项所述的传输方法,其中:所述第一控制PDU还包括第四字段,所述第四字段用于指示所述第一IAB节点的剩余缓存或期望缓存的大小;或,所述第一控制PDU还包括至少一个第五字段,每一个第五字段对应于一个发生拥塞的BH RLC信道或BH RLC信道组,用于指示对应的BH RLC信道或BH RLC信道组的剩余缓存或期望缓存大小;或,所述第一控制PDU还包括至少一个第六字段,每一个第六字段对应于一个发生拥塞的BH RLC信道区间,用于指示对应的发生拥塞的BH RLC信道区间的剩余缓存或期望缓存大小。
- 根据权利要求1-8中任意一项所述的传输方法,其中:所述第一控制PDU还包括至少一个第七字段,每一个第七字段对应于一个发生拥塞的BH RLC信道区间,用于指示对应的发生拥塞的BH RLC信道区间的期望接收数据速率。
- 根据权利要求1所述的传输方法,其中,在所述向第二IAB节点发送第一控制PDU之后,还包括:向所述第二IAB节点发送第二控制PDU,指示拥塞解除。
- 根据权利要求11所述的传输方法,其中,所述第二控制PDU还包括第八字段,用于指示拥塞解除,所述第一控制PDU还包括第二字段,所述第二字段用于指示第一字段的格式,所述第八字段和第二字段属于同一个字段。
- 一种传输方法,用于第二接入和回传一体化IAB节点,包括:接收第一IAB节点发送的第一控制协议数据单元PDU,所述第二IAB节点为所述第一IAB节点的父节点,所述第一控制PDU包括第一字段;所述第一字段用于指示发生拥塞的回传无线链路控制BH RLC信道或BH RLC信道组或BH RLC信道区间。
- 根据权利要求13所述的传输方法,其中,所述BH RLC信道区间由 所述第一IAB节点动态确定。
- 根据权利要求13所述的传输方法,其中,所述第一控制PDU还包括第二字段,所述第二字段用于指示第一字段的格式。
- 根据权利要求15所述的传输方法,其中:所述第一字段的格式包括第一格式、第二格式和第三格式中的至少一种;所述第一格式的第一字段包括用于指示拥塞状态的N个指示位,每一个BH RLC信道或BH RLC信道组对应于一个指示位;所述N大于或等于所述第一IAB节点和第二IAB节点间的BH RLC信道或BH RLC信道组的数量;所述第二格式的第一字段用于指示发生拥塞的BH RLC信道的标识信息或BH RLC信道组的标识信息;所述第三格式的第一字段用于指示发生拥塞的BH RLC信道区间。
- 根据权利要求16所述的传输方法,其中:所述第三格式的第一字段包括第一标识字段和第二标识字段,或者包括第一标识字段和数量字段;所述第一标识字段用于指示发生拥塞的BH RLC信道区间的第一个BH RLC信道的标识信息;所述第二标识字段用于指示发生拥塞的BH RLC信道区间的最后一个BH RLC信道的标识信息;所述数量字段用于指示发生拥塞的BH RLC信道区间包含的信道的数量。
- 根据权利要求16所述的传输方法,其中:在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量小于或等于第一预定数量的情况下,所述第一字段的格式为所述第一格式;或,在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量大于或等于第一预定数量的情况下,所述第一字段的格式为所述第二格式;或,在所述第一IAB和第二IAB之间的下行BH RLC信道或信道组的数量大于或等于第一预定数量的情况下,所述第一字段的格式为所述第三格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量小于或等于第二预定数量的情况下,所述第一字段的格式为所述第二格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量大于或等于第二预定数量的情况下,所述第一字段的格式为所述第一格式;或,在发生拥塞的BH RLC信道或BH RLC信道组的数量大于或等于第二预定数量的情况下,所述第一字段的格式为所述第三格式。
- 根据权利要求16所述的传输方法,其中:在所述第一IAB和第二IAB之间的下行BH RLC信道中,存在被配置为使用扩展的逻辑信道标识eLCID的BH RLC信道的情况下,所述第一字段中的的BH RLC信道的标识信息的长度等于eLCID格式的标识信息的长度;或,在所述第一IAB和第二IAB之间的下行BH RLC信道全部被配置为使用逻辑信道标识LCID的情况下,所述第一字段中的BH RLC信道的标识信息为LCID格式。
- 根据权利要求19所述的传输方法,其中:所述第一控制PDU还包括第三字段,所述第三字段用于指示所述BH RLC信道的标识信息的格式;或,在所述第一字段携带BH RLC信道的标识信息的情况下,所述第二字段还用于指示所述标识信息的格式。
- 根据权利要求13-20中任意一项所述的传输方法,其中:所述第一控制PDU还包括第四字段,所述第四字段用于指示所述第一IAB节点的剩余缓存或期望缓存的大小;或,所述第一控制PDU还包括至少一个第五字段,每一个第五字段对应于一个发生拥塞的BH RLC信道或BH RLC信道组,用于指示对应的BH RLC信道或BH RLC信道组的剩余缓存或期望缓存大小;或,所述第一控制PDU还包括至少一个第六字段,每一个第六字段对应于一个发生拥塞的BH RLC信道区间,用于指示对应的发生拥塞的BH RLC信道区间的剩余缓存或期望缓存大小。
- 根据权利要求13-20中任意一项所述的传输方法,其中:所述第一控制PDU还包括至少一个第七字段,每一个第七字段对应于一个发生拥塞的BH RLC信道区间,用于指示对应的发生拥塞的BH RLC信道区间的期望接收数据速率。
- 根据权利要求13-20中任意一项所述的传输方法,其中,在所述接收第一IAB节点发送的第一控制PDU之后,还包括:接收所述第一IAB节点发送的第二控制PDU,指示拥塞解除。
- 根据权利要求23所述的传输方法,其中,所述第二控制PDU还包括第八字段,用于指示拥塞解除,所述第一控制PDU还包括第二字段,所述第二字段用于指示第一字段的格式,所述第八字段和第二字段属于同一个字段。
- 一种网络设备,所述网络设备为第一网络设备,其中,所述网络设备包括:发送模块,用于向第二网络设备发送第一控制PDU,所述第二网络设备为所述第一网络设备的父节点,所述第一控制PDU包括第一字段;所述第一字段用于指示发生拥塞的BH RLC信道或BH RLC信道组或BH RLC信道区间。
- 一种网络设备,所述网络设备为第二网络设备,其中,所述网络设备包括:接收模块,用于接收第一网络设备发送的第一控制PDU,所述第二网络设备为所述第一网络设备的父节点,所述第一控制PDU包括第一字段;所述第一字段用于指示发生拥塞的BH RLC信道或BH RLC信道组或BH RLC信道区间。
- 一种网络设备,包括:存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序,所述程序被所述处理器执行时实现如权利要求1- 12中任一项所述的传输方法中的步骤。
- 一种网络设备,包括:存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序,所述程序被所述处理器执行时实现如权利要求13-24中任一项所述的传输方法中的步骤。
- 一种计算机可读存储介质,其中,所述计算机可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现如权利要求1-12中任一项所述的传输方法中的步骤;或者,所述计算机程序被处理器执行时实现如权利要求13-24中任一项所述的传输方法中的步骤。
- 一种计算机程序产品,其中,所述程序产品被存储在非易失的存储介质中,所述程序产品被至少一个处理器执行以实现如权利要求1-24中任一项所述的传输方法的步骤。
- 一种网络设备,其中,所述网络设备用于执行如权利要求1-24中任一项所述的传输方法的步骤。
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