WO2020221304A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2020221304A1
WO2020221304A1 PCT/CN2020/087838 CN2020087838W WO2020221304A1 WO 2020221304 A1 WO2020221304 A1 WO 2020221304A1 CN 2020087838 W CN2020087838 W CN 2020087838W WO 2020221304 A1 WO2020221304 A1 WO 2020221304A1
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WIPO (PCT)
Prior art keywords
cell
iab
iab node
message
node
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PCT/CN2020/087838
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English (en)
French (fr)
Inventor
刘菁
戴明增
曹振臻
朱元萍
卓义斌
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华为技术有限公司
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Publication of WO2020221304A1 publication Critical patent/WO2020221304A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • the fifth generation (5G) mobile communication system (the fifth generation, 5G) new radio (NR) technology can use larger bandwidths, such as millimeter wave frequency bands, and can apply large-scale antennas and multi-beam systems, so 5G can Provides a higher system rate.
  • This provides conditions for the application of integrated access and backhaul (IAB) nodes in 5G.
  • the wireless access link and wireless backhaul link are integrated in the IAB node.
  • the wireless access link is the communication link between the user equipment (UE) and the IAB node
  • the wireless backhaul link is the communication link between the IAB nodes.
  • the communication link, as well as the communication link between the IAB node and the IAB host, is used for data return. Therefore, IAB nodes do not need a wired transmission network for data backhaul, and IAB nodes are easier to deploy in dense scenarios, which reduces the burden of deploying wired transmission networks.
  • the IAB node When the IAB node is started, it will select a cell to access the network. At present, some cells in the network can support the IAB function, and some cells do not support the IAB function. The IAB node cannot use the IAB function normally when accessing a cell that does not support the IAB function.
  • the embodiments of the present application provide a communication method and device, which are used to increase the success rate of an IAB node accessing a cell supporting the IAB function and increase the success rate of using the IAB function.
  • a communication method is provided, which is implemented in the following manner: a first access backhaul integrated IAB node receives a system message, the system message includes a cell list, and the cell list includes one or more support IAB function cell; the first IAB node obtains the cell list.
  • the IAB node obtains the cell list that supports IAB node access or the cell list that supports the IAB function from the system message by reading the system message broadcast by the cell, which improves the success rate of IAB node access to the cell that supports the IAB function and improves the use The success rate of the IAB function.
  • the first IAB node performs cell selection, where the selected suitable cell is a cell that supports IAB function; or, the first IAB node performs cell reselection, where the best reselection is The cell is a cell that supports the IAB function.
  • the IAB node can perform cell selection or cell reselection according to the cell list information provided in the system message, and the selected or reselected cell is a cell that supports IAB node access or a cell that supports IAB function.
  • the time delay for IAB nodes to access the cell can be reduced, and the efficiency of cell selection or cell reselection can be improved, which is helpful to the realization of IAB technology.
  • the first IAB node performs cell selection criteria for the cells in the cell list; or, the first IAB node performs cell reselection for the cells in the cell list The verdict of the guidelines.
  • the first IAB node performs cell selection according to a cell selection criterion, and the cell selection criterion includes that the selected cell supports the IAB function; or, the first IAB node performs cell reselection according to the cell reselection criterion.
  • the criteria for the cell reselection include that the reselected cell supports the IAB function.
  • a communication method which is implemented in the following manner: the first IAB node receives a system message from a cell; wherein, when the system message includes configuration information for random access of the IAB node, The cell supports the IAB function, or, when the system message does not include the configuration information for random access of the IAB node, the cell does not support the IAB function; the first IAB node selects a cell that supports the IAB function to initiate Random access.
  • the IAB node can learn whether the cell supports the IAB function or whether the cell supports IAB node access based on the system message broadcast by the cell and whether the system message carries configuration information for random access of the IAB node.
  • the method further includes: when the system message includes configuration information for random access of the IAB node, the first IAB node executes the decision of the cell selection criterion or the The cell executes the decision of the cell reselection criterion.
  • the IAB node can carry the configuration information for the random access of the IAB node in the system message, the cell selection criterion or cell reselection criterion judgment is performed on the cell, and the cell is selected as suitable when the cell meets the cell selection criterion. Cell and camp on it, or, when the cell meets the cell reselection criteria, the cell is selected as the best cell and random access is initiated.
  • a communication method is provided, which is implemented in the following manner: a first access backhaul integrated IAB node sends a first message to the IAB donor, the first message includes indication information, and the indication information is used for Indicates that the first IAB node is an IAB node; the first IAB node receives a second message from the IAB donor, the second message includes a cell list, and the cell list includes one or more supporting IAB functions Of the cell.
  • the IAB node indicates to the network side that the node is an IAB node during the random access process, and the network side returns a second message containing the cell list information to the IAB node.
  • the IAB node can obtain support for IAB from the second message.
  • a list of cells that the node accesses or a list of cells that support the IAB function. Improve the success rate of IAB nodes accessing the cell that supports the IAB function, and increase the success rate of using the IAB function.
  • the first message is a radio resource control RRC establishment request message
  • the second message is an RRC rejection message
  • the first IAB node performs cell selection, where the selected suitable cell is a cell in the cell list; or, the selected suitable cell is a cell that supports the IAB function; or, the first An IAB node performs cell reselection, where the reselected cell is a cell in the cell list, or the best cell to be reselected is a cell that supports the IAB function.
  • the IAB node can perform cell selection or cell reselection according to the cell list, and the selected or reselected cell is a cell that supports IAB node access or a cell that supports IAB function. In this way, the time delay for IAB nodes to access the cell can be reduced, and the efficiency of cell selection or cell reselection can be improved, which is helpful to the realization of IAB technology.
  • the first IAB node performs cell selection criteria for the cells in the cell list; or, the first IAB node performs cell reselection for the cells in the cell list The verdict of the guidelines.
  • the first IAB node performs cell selection according to cell selection criteria; wherein, the cell selection criterion includes that the selected cell belongs to a cell in the cell list, or the cell selection criterion includes selection
  • the first IAB node performs cell reselection according to the cell reselection criterion; wherein the cell reselection criterion includes that the reselected cell belongs to the cell in the cell list, or The criteria for the cell reselection include that the reselected cell supports the IAB function.
  • the first IAB node sends a third message to the IAB donor, where the third message is used to indicate information about whether a cell under the first IAB node supports the IAB function.
  • the fourth aspect provides a communication method: the first IAB node generates a first message, the first message includes first indication information, and the first The indication information is used to indicate whether the cell under the first IAB node supports the IAB function; the first IAB node sends the first message to the IAB donor, where the first IAB node is an IAB donor DU or an IAB node.
  • IABdonor can learn whether the cell supports the IAB function. It is convenient to perform RRC control and random access control on attached IAB nodes.
  • the first IAB node receives the first indication information from an operation, maintenance and management OAM server.
  • the first IAB node receives a second message from a second IAB node, the second message includes second indication information, and the second indication information is used to indicate the second IAB node Is an IAB node; the first IAB node sends a third message to the IAB donor, and the third message includes the second indication information and the cell under the first IAB node accessed by the second IAB node Logo.
  • the first IAB node receives a fourth message from the IAB donor, where the fourth message includes list information of cells that support IAB node access or list information of cells that support IAB functions; The first IAB node forwards the fourth message to the second IAB node.
  • a communication method is provided: an access network device generates a system message, the system message includes a cell list, and the cell list contains one or more cells that support the IAB function;
  • the inbound and backhaul integrated IAB node sends the system message.
  • the IAB node obtains the list of cells that support the access of the IAB node or the list of cells that support the IAB function from the system message by reading the system message broadcast by the cell. And help to improve the success rate of using IAB function.
  • a communication method is provided: an IAB donor receives a first message from a first access backhaul integrated IAB node, the first message includes indication information, and the indication information is used to indicate the first IAB node Is an IAB node; the IAB donor sends a second message to the first IAB node, the second message includes a cell list, and the cell list includes one or more cells that support the IAB function.
  • the IAB node can obtain the list of cells that support the access of the IAB node or the list of cells that support the IAB function from the second message. And help to improve the success rate of using IAB function.
  • the first message is a radio resource control RRC establishment request message
  • the second message is an RRC rejection message
  • the IAB donor receives a third message from the first IAB node, and the third message is used to indicate information about whether a cell under the first IAB node supports an IAB function.
  • a communication device may be an IAB node, or an access network device, or an IAB donor, or a chip.
  • the device has the function of realizing any one of the above-mentioned first to fourth aspects. This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes a processor, a communication interface, and a memory.
  • the communication interface is used to transmit messages and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes the communication method described in any one of the first to fourth aspects. .
  • the present application also provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause 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.
  • an embodiment of the present application provides a chip, the chip includes a processor and an interface circuit, the interface circuit is coupled to the processor, and the processor is used to run a computer program or instruction to implement aspects such as the first aspect to the first aspect.
  • the interface circuit is used to communicate with other modules outside the chip.
  • Figure 1 is one of the schematic diagrams of the communication system architecture in an embodiment of the application
  • FIG. 3 is a schematic flowchart of a communication method in an embodiment of this application.
  • FIG. 5 is a schematic diagram of the third process of the communication method in an embodiment of this application.
  • FIG. 6 is a schematic diagram of three examples of communication methods in an embodiment of the application.
  • FIG. 7 is a schematic diagram of another example of the third communication method in an embodiment of this application.
  • FIG. 8 is a schematic diagram of the fourth flow of the communication method in an embodiment of this application.
  • FIG. 9 is one of the schematic structural diagrams of the communication device in the embodiment of the application.
  • FIG. 10 is the second schematic diagram of the structure of the communication device in the embodiment of this application.
  • the embodiments of the present application provide a communication method and device to help an IAB node select a cell that supports the IAB function to access, so that the application of the IAB technology can be implemented normally.
  • the method and the device are based on the same concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • "and/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist at the same time. There are three cases of B.
  • the communication method provided in the embodiments of the present application can be applied to various communication systems, such as: a fifth generation (5th Generation, 5G) new radio (NR) communication system, and future communication systems, such as a 6G system.
  • 5G fifth generation
  • NR new radio
  • FIG. 1 shows the architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable.
  • the communication system 100 includes: integrated access and backhaul (IAB) Node 101.
  • the communication system 100 may also include an IAB donor (donor) 102.
  • the communication system 100 may also include a core network and terminals.
  • the terminal can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal equipment, wireless communication equipment, user Agent or user device.
  • the terminal in the embodiment of this application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal device , Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety (transportation) wireless terminals in safety), wireless terminals in smart cities, and wireless terminals in smart homes.
  • An IAB node can include IAB node mobile terminal (MT) and IAB node DU Two parts. Among them, the IAB node MT is similar to the function of user equipment (UE), communicates with the parent node, and provides data return. IAB node DU is similar to the function of DU in gNB, including physical layer (PHY)/medium access control (MAC)/radio link control (RLC) layer functions, and communicates with child nodes , Provide access services for child nodes.
  • PHY physical layer
  • MAC medium access control
  • RLC radio link control
  • an IAB donor can include IAB donor DU and IAB donor CU.
  • the function of the IAB donor DU is similar to the function of the IAB node DU, including the functions of the PHY/MAC/RLC layer, which is used to provide access services for the child nodes attached to the IAB donor.
  • the IAB donor CU is used to perform radio resource control (radio resource control, RRC) control on all IAB nodes and UE nodes under it.
  • RRC radio resource control
  • the communication system architecture to which the communication method of the embodiment of the present application is applicable may include multiple IAB nodes. Take two IAB nodes as an example in Figure 2. As shown in Figure 2, the two-hop data return scenario is expressed. Two IAB nodes are represented by IAB node 1 and IAB node 2. For the functions of the IAB node 2 and the IAB node 1, refer to the description of the IAB node in the communication system architecture shown in FIG. 1 above. IAB node 2 is a child node of IAB node 1, and IAB node 1 is a child node of IAB donor. The IAB donor performs RRC control on the IAB node 1, the IAB node 2 and the terminal 104, such as storing the context of these nodes.
  • the IAB node needs to perform cell selection and cell reselection when accessing the network.
  • the purpose of cell selection is to select a suitable (suitable) cell.
  • the purpose of cell reselection is to select a cell with the best signal quality for subsequent use in that cell.
  • the cell initiates random access.
  • the cell accessed by the IAB node is the cell under the DU of the parent node of the IAB node. For example, as shown in Figure 2, the IAB node 2 accesses the cell under the DU of the IAB node 1, and the IAB node 1 accesses the cell under the DU of the IAB donor.
  • cells can include two categories. One is a cell that supports IAB function, or a cell that supports IAB node access.
  • the cell under the DU of IAB node 1 in Figure 2 can support the access of IAB node 2, and for example, the DU under IAB donor The cell can support IAB node 1 access.
  • the other is a normal cell.
  • the normal cell can only support the access of ordinary terminals, but cannot support the access of IAB nodes, or that the cell cannot support the IAB function.
  • the IAB node When the IAB node scans the frequency point, it may scan some cells that do not support the IAB function. When the IAB node accesses the cell that does not support the IAB function, the process of re-accessing the cell will be triggered, which will increase the access delay. , Affect the communication quality.
  • the communication method provided in the embodiments of this application can help the IAB node to know which cells support the IAB function or which cells support the IAB node access. When the IAB node is in cell selection or cell reselection, it can refer to these cells for camping. Stay, thereby improving the efficiency of cell selection and cell reselection, and contribute to the realization of IAB technology.
  • support IAB function can be equivalently replaced with “support IAB node access”, and the meanings expressed by the two description methods are the same.
  • a cell supports the IAB function, which means that the cell supports IAB node access.
  • support IAB function can also be replaced with other similar expressions of cell capability, which is not limited in this application.
  • the cell broadcasts a system message, and the IAB node receives the system message.
  • the cell is a cell under the access network device, which may be a cell under an IAB node, or a cell under a common base station (for example, gNB).
  • IAB node When the IAB node is in the idle state, cell selection is required, or cell reselection may be performed when a cell to reside on has been selected.
  • the IAB node needs to monitor system messages broadcast by the cell before performing cell selection or cell reselection.
  • the IAB node obtains a list of cells that support the access of the IAB node or a list of cells that support the IAB function from the system message.
  • the system message includes a cell list
  • the cell list includes one or more cells
  • the cells in the cell list are cells that support IAB node access or cells that support IAB functions.
  • the IAB node can obtain a list of cells that support IAB node access or a list of cells that support IAB functions from the system message.
  • any cell can broadcast and carry the list information of the surrounding cells that support IAB node access or the list of the surrounding cells that support the IAB function.
  • the list information of the cell can be carried in the SIB1 of the system message, so that the IAB node can obtain the list information of the cell from the system message earlier.
  • the system architecture shown in Figure 2 Take the system architecture shown in Figure 2 as an example. Assuming that the IAB node that receives system messages is IAB node 2, the cell that broadcasts the system message can be the cell under the DU of IAB node 1, or of course it can also be another cell that does not support IAB functions. Community. Assuming that the IAB node that receives the system message is IAB node 1, the cell that broadcasts the system message can be a cell under the DU of the IAB donor, and of course it can also be other cells that do not support the IAB function.
  • the IAB node can learn the list of cells that support IAB node access or the list of cells that support the IAB function.
  • the cell selection or cell reselection process can be performed only on the cells in the cell list. .
  • a cell selection or cell reselection step may also be included.
  • the IAB node performs cell selection.
  • the IAB node should refer to the cell list obtained above when performing cell selection, that is, the suitable cell obtained by the IAB node cell selection is the cell in the cell list, or the suitable cell obtained by the IAB node cell selection is the support IAB A functional cell, or a cell that supports IAB node access.
  • the IAB node After the IAB node is powered on, it needs to perform initial cell selection.
  • the IAB node performs frequency point scanning according to its own capabilities.
  • the IAB node only executes the decision of the cell selection criteria for the cells that are scanned and belong to the cell list. Or, the IAB node first determines the cell selection criteria for the scanned cell, and if it meets the cell selection criteria, it further determines whether the cell that meets the cell selection criteria is in the cell list. Only if it is in the cell list, The IAB node will use the cell as a suitable cell and camp on it.
  • the cell selection criterion here can refer to the description of the existing cell selection criterion, for example, the cell selection criterion is the existing S criterion.
  • the IAB node obtains the measurement result of the cell through measurement, obtains each parameter in the S criterion formula through the system information of the cell and its own capabilities, and judges whether the S criterion formula is established, and if it is established, it meets the S criterion.
  • a cell conforming to the S criterion can meet the channel quality requirements for cell selection.
  • the specific content of the S criterion is as follows:
  • the IAB node determines the cell selection criteria according to the new cell selection criteria for the scanned cells.
  • the new cell selection criteria are based on the existing cell selection criteria, and a new condition must be referred to, that is, the selected cell needs to support the IAB function or support the access of the IAB node.
  • the IAB node selects the cell for camping only when it determines that the cell meets the new cell selection criteria.
  • the cell reselection criterion can be equivalent to the cell selection criterion.
  • the IAB node performs cell reselection.
  • This step can be independent of S303. It can also be executed after S303.
  • the IAB node After the IAB node performs cell selection, it camps on a suitable cell and reads the system broadcast of the cell to obtain parameter information related to cell reselection.
  • the system message of the cell includes the list information of the cells that support the access of the IAB node or the list information of the cells that support the IAB function.
  • the IAB node After receiving the system message, the IAB node can obtain a list of cells that support IAB node access or a list of cells that support IAB functions from the system message.
  • the IAB node Similar to cell selection, the IAB node only executes the cell reselection criteria for the cells in the cell list among the scanned cells. Or, the IAB node first determines the cell reselection criteria for the scanned cell, and if it meets the cell reselection criteria, it further determines whether the cell that meets the cell reselection criteria is in the cell list, and only those in the cell list In this case, the IAB node will regard this cell as the best cell, camp on it, and initiate random access in this cell. For example, the cell reselection criterion is the R criterion.
  • the IAB node obtains the measurement results of each cell through measurement, obtains each parameter in the S criterion formula through the system information of each cell and its own capabilities, and obtains the S value of each cell.
  • Each cell is sorted according to the R criterion according to the channel quality, and the best cell is selected.
  • the specific content of the R criterion is as follows:
  • R s Q meas, s + Q hyst -Qoffset temp
  • R n Q meas,n -Qoffset-Qoffset temp
  • the aforementioned Rs is the measured value of the serving cell
  • Rn is the measured value of the neighbor cell. Only within a specified time, the measured value Rn of the neighboring cell is always better than the measured value Rs of the serving cell, it means that the cell meets the cell reselection criterion.
  • the IAB node determines the cell reselection criterion according to the new cell reselection criterion on the scanned cell.
  • the new cell reselection criteria are based on the existing cell reselection criteria, and a new condition must be referred to, that is, the cell reselection needs to support the IAB function or support the access of the IAB node.
  • the IAB node selects the cell for access only when it determines that the cell meets the new cell reselection criteria.
  • the IAB node obtains a list of cells that support IAB node access or a list of cells that support the IAB function from the system message by reading the system message broadcast by the cell.
  • the IAB node can perform cell selection or cell reselection according to the cell list information provided in the system message.
  • the selected or reselected cell is a cell that supports IAB node access or a cell that supports IAB function. In this way, the time delay for IAB nodes to access the cell can be reduced, and the efficiency of cell selection or cell reselection can be improved, which is helpful to the realization of IAB technology.
  • the cell broadcasts a system message
  • the IAB node receives the system message broadcast by the scanned cell.
  • the cell broadcasting the system message may be a cell under the DU of the IAB node 1.
  • the IAB node that receives the system message is IAB node 1
  • the cell that broadcasts the system message may be a cell under the DU of the IAB donor.
  • the IAB node can determine whether the cell supports the IAB function or whether the cell supports the access of the IAB node by whether the system message carries the configuration information of random access.
  • the configuration information for random access of the IAB node is different from the configuration information for the random access of the UE. Therefore, when the configuration information for the random access of the IAB node is included in the system message, the cell supports the IAB function or the cell supports the IAB node Or, when the configuration information for random access of IAB nodes is not included in the system message, the cell does not support the IAB function or the cell does not support the access of IAB nodes.
  • the IAB node selects a cell that supports the IAB function or supports the access of the IAB node to initiate random access.
  • the IAB node determines whether the cell supports the IAB function or supports the access of the IAB node according to the system message broadcast by the cell.
  • the system message includes the configuration information for the random access of the IAB node
  • the IAB node executes the cell selection criterion decision on the cell or executes the cell reselection criterion decision on the cell.
  • the cell meets the cell selection criteria, select the cell as a suitable cell and camp on it; or, when the cell meets the cell reselection criteria, reselect the cell as the best cell and initiate random access.
  • the IAB node can learn whether the cell supports the IAB function or whether the cell supports the IAB function or whether the system message carries configuration information for random access of the IAB node according to the system message broadcast by the cell Support IAB node access.
  • the cell selection criterion or the cell reselection criterion judgment is performed on the cell, and the cell is selected when the cell meets the cell selection criterion.
  • the cell serves as a suitable cell and camps on it, or, when the cell meets the cell reselection criteria, the cell is selected as the best cell and random access is initiated.
  • the specific process of the third communication method provided by the embodiment of the present application is as follows. This method involves the interaction between the IAB node and the IAB donor.
  • the IAB node sends a first message to the IAB donor, and the IAB donor receives the first message from the IAB node.
  • the IAB node here can be called the first IAB node.
  • the first message includes indication information, and the indication information is used to indicate that the first IAB node is an IAB node, that is, indicate that the type of the first IAB node is an IAB node, and the type here is a node distinguished from ordinary terminals.
  • the IAB donor returns a second message to the first IAB node, and the first IAB node receives the second message from the IAB donor.
  • the second message includes the list information of the cells that support the access of the IAB node or the list information of the cells that support the IAB function.
  • the first IAB node is IAB node 1
  • the first IAB node is directly connected to the IAB donor.
  • the first IAB node sends the first message to the IAB donor
  • the IAB donor receives the first message from the first IAB node
  • the IAB donor returns the second message to the first IAB node.
  • the MT in the first IAB node sends the first message to the DU of the IAB donor
  • the DU of the IAB donor encapsulates the first message into an F1AP message and then forwards it to the CU of the IAB donor.
  • the CU of the IAB donor returns the F1AP message carrying the second message to the DU of the IAB donor, and the DU of the IAB donor receives the F1AP message containing the second message from the CU of the IAB donor, and returns the second message to the MT of the first IAB node.
  • the IAB node 2 needs to send the first message to the IAB donor through the IAB node 1, and receive the second message from the IAB donor through the IAB node 1. Specifically, the MT of the IAB node 2 sends the first message to the DU of the IAB node 1, and the DU of the IAB node 1 encapsulates the first message into an F1AP message and forwards it to the CU of the IAB donor.
  • the CU of the IAB donor returns the F1AP message carrying the second message to the DU of the IAB node 1, and the DU of the IAB node 1 receives the F1 message containing the second message from the CU of the IAB donor and returns the second message to the IAB node 2.
  • the first message and the second message are messages sent during random access.
  • the first message is an RRC setup request message
  • the second message is an RRC reject message.
  • the first IAB node is IAB node 1
  • the first IAB node is directly connected to the IAB donor.
  • the MT of IAB node 1 sends a random access preamble to the cell under IAB donor DU
  • the cell under IAB donor DU returns a random access response to the MT of IAB node 1
  • the MT of IAB node 1 sends a response to the IAB.
  • the donor DU sends an RRC connection establishment request message (or RRC establishment request message).
  • IAB donor DU encapsulates the RRC connection establishment request message in an F1AP message and sends it to IAB donor CU.
  • IAB donor CU extracts RRC from the received F1AP message A connection establishment request message, and the RRC connection establishment request message carries indication information of the IAB node.
  • IAB donor CU generates an RRC rejection message, encapsulates the RRC rejection message in an F1AP message and sends it to IAB donor DU.
  • IAB donor DU After extracting the RRC rejection message from the F1AP message, IAB donor DU sends the RRC rejection message to the IAB node just after The MT of 1, the MT of IAB node 1 receives the RRC rejection message from the IAB donor DU.
  • the RRC reject message includes the list information of the cells that support IAB node access or the list of cells that support the IAB function.
  • IAB node 2 needs to send the first message to IAB donor through IAB node 1, and receive the second message from IAB donor through IAB node 1.
  • the MT of the IAB node 2 sends a random access preamble to the DU of the IAB node 1, and the DU of the IAB node 1 receives the random access preamble from the MT of the IAB node 2.
  • the DU of the IAB node 1 returns a random access response to the MT of the IAB node 2.
  • the MT of the IAB node 2 sends an RRC connection establishment request message to the DU of the IAB node 1.
  • the DU of the IAB node 1 encapsulates the connection establishment request message into an F1AP message and forwards it to the IAB donor CU.
  • the connection establishment request message carries the IAB node’s CU. Instructions.
  • the CU of the IAB donor returns the F1AP message containing the RRC rejection message to the DU of the IAB node 1.
  • the DU of the IAB node 1 receives the F1AP message containing the RRC rejection message from the CU of the IAB donor and returns the RRC rejection message to the IAB node 2.
  • the RRC reject message carries the list information of the cells that support the access of the IAB node or the list information of the cells that support the IAB function.
  • the MT of the first IAB node After receiving the second message, the MT of the first IAB node determines the list of cells that support IAB node access according to the list of cells that support IAB node access contained in the second message; in other words, according to the second message
  • the included list information of the cells supporting the IAB function determines the list of cells supporting the IAB function.
  • steps S503 and S504 may be executed, or only steps S503 or S504 may be executed.
  • the MT of the IAB node performs cell selection.
  • the MT of the IAB node should refer to the cell list obtained above when performing cell selection.
  • the cell selected by the MT of the IAB node to access is the cell in the cell list.
  • the MT of the IAB node needs to reselect the cell after receiving the RRC rejection message.
  • the MT of the IAB node performs frequency point scanning.
  • the MT of the IAB node executes the decision of the cell selection criterion only for the cells in the cell list among the scanned cells. Or, the MT of the IAB node first determines the cell selection criteria for the scanned cells, and if it meets the cell selection criteria, it further determines whether the cell that meets the cell selection criteria is in the cell list, only if it is in the cell list Then, the cell will be selected for access.
  • the cell selection criteria here can refer to the existing cell selection criteria described in S303.
  • the IAB node determines the cell selection criteria according to the new cell selection criteria for the scanned cells.
  • the new cell selection criterion is based on the existing cell selection criterion, and a new condition is also referred to, that is, the selected cell belongs to the cell in the cell list.
  • the IAB node will select the cell for access only when it determines that the cell meets the new cell selection criteria.
  • the cell reselection criterion can be equivalent to the cell selection criterion.
  • the IAB node performs cell reselection.
  • This step can be independent of S503. It can also be executed after S503.
  • the MT of the IAB node may perform cell reselection after the cell selection.
  • the MT of the IAB node selects the cell for initial access can be performed according to S503.
  • the MT of the IAB node directly performs the cell reselection process according to the cell list information carried in the RRC rejection message.
  • the IAB node Similar to cell selection, the IAB node only executes the cell reselection criteria for the cells in the cell list among the scanned cells. Or, the IAB node first determines the cell reselection criteria for the scanned cell, and if it meets the cell reselection criteria, it further determines whether the cell that meets the cell reselection criteria is in the cell list, and only those in the cell list In this case, the cell will be selected for access.
  • the cell reselection criteria here can refer to the existing cell reselection criteria described in S304.
  • the IAB node determines the cell reselection criterion according to the new cell reselection criterion on the scanned cell.
  • the new cell reselection criterion is based on the existing cell reselection criterion, and a new condition must be referred to, that is, the selected cell belongs to the cell in the cell list.
  • the IAB node selects the cell for access only when it determines that the cell meets the new cell reselection criteria.
  • the IAB node indicates to the network side that the node is an IAB node during the random access process, and the network side returns the second message containing the cell list information to the IAB node.
  • the IAB node A list of cells supporting IAB node access or a list of cells supporting IAB function can be obtained from the second message.
  • the IAB node may perform cell selection or cell reselection according to the cell list, and the selected or reselected cell is a cell that supports IAB node access or a cell that supports IAB function.
  • the time delay for IAB nodes to access the cell can be reduced, and the efficiency of cell selection or cell reselection can be improved, which is helpful to the realization of IAB technology.
  • the IAB node generates a first message.
  • the first message is used to indicate whether the cell under the IAB node supports the IAB function, or the first message is used to indicate whether the cell under the IAB node supports IAB node access.
  • the IAB node may receive indication information from operation administration and maintenance (OAM).
  • OAM operation administration and maintenance
  • the indication information is used to indicate whether the cell under the IAB node supports the IAB function, or the indication information is used to indicate whether the cell under the IAB node Support IAB node access.
  • the IAB node generates the first message through the instruction information received from the OAM.
  • the IAB node sends the first message to the IAB donor, and the IAB donor receives the first message from the IAB node.
  • the IAB donor can obtain the information about whether the cell under the IAB node supports the IAB function or whether it supports the IAB node access.
  • the cell of any IAB node under the IAB donor can report capabilities to the IAB donor through the above method.
  • the IAB donor obtains and stores the cell capability information reported by all IAB nodes under it.
  • the IAB donor can return to the IAB node that initiated the random access to support the IAB capability according to the stored cell capability information of each IAB node List information of the cell. In this way, it can help improve the cell selection or cell reselection efficiency of the IAB node.
  • the IAB donor DU receives indication information from the OAM server.
  • the indication information is used to indicate whether the cell under the IAB donor DU supports the IAB function, or the indication information is used for Indicate whether the cell under the IAB donor DU supports IAB node access.
  • the IAB donor DU obtains the instruction information, it generates a first message and sends it to the IAB donor CU, so as to further notify the IAB donor CU of whether the IAB donor DU cell supports the IAB function or whether it supports IAB node access.
  • the fourth communication method provided in this embodiment may further include the following steps.
  • the second IAB node MT sends a second message to the first IAB node DU, and the first IAB node DU receives the second message from the second IAB node MT.
  • the second message includes indication information, which is used to indicate that the second IAB node MT is an IAB node;
  • the first IAB node DU sends a third message to the IAB donor CU, and the IAB donor CU receives the third message sent by the first IAB node DU.
  • the third message includes the indication information described in S803 and the identity of the cell under the first IAB node DU accessed by the second IAB node MT.
  • the IAB donor CU sends a fourth message to the first IAB node DU, and the first IAB node DU receives the fourth message from the IAB donor CU.
  • the IAB donor CU carries the list information of the cells that support the access of the IAB node or the list information of the cells that support the IAB function in the fourth message.
  • the fourth message includes the list information of the cells that support the access of the IAB node or the list information of the cells that support the IAB function.
  • the first IAB node DU forwards the fourth message to the second IAB node MT, and the second IAB node MT receives the fourth message from the first IAB node DU.
  • the first IAB node sends a fifth message to the second IAB node, and the second IAB node receives the fifth message from the first IAB node, and the fifth message carries the content contained in the fourth message.
  • the IAB node DU receives a message from another IAB node MT, and forwards the message to the IAB donor CU, the message is encapsulated, an F1AP message is generated, and then forwarded.
  • the F1AP message sent by the IAB donor CU to the IAB node DU after the IAB node DU parses it, extracts the RRC message from the F1AP message and forwards it to other IAB node MT.
  • the above-mentioned communication method 1 to communication method 4 provided in the embodiments of this application can independently form the solution that needs to be protected in this application, and can also be combined to form the solution that needs to be protected in this application.
  • the third communication method can be combined with the fourth communication method. That is, on the basis of the third communication method, it may further include a method for the IAB node to report the capability to the IAB donor.
  • an embodiment of the present application further provides a communication device, which is configured to execute any of the above-mentioned communication methods.
  • the communication device includes a processing unit 901 and a transceiver unit 902.
  • the transceiver unit 902 is used to receive system messages; the processing unit 901 is used to obtain a cell list, and can also be used to select a cell that supports the IAB function to initiate random access.
  • the processing unit 901 is used to generate a system message
  • the transceiver unit 902 is used to send the system message to an IAB node.
  • the transceiver unit 902 is used to receive a first message from the first IAB node, where the first message includes indication information, and the indication information is used to indicate the first message.
  • An IAB node is an IAB node. And send a second message to the first IAB node, where the second message includes a cell list, and the cell list includes one or more cells that support the IAB function.
  • the processing unit 901 and the transceiving unit 902 may also be used to perform other corresponding steps in the foregoing method embodiment. For details, please refer to the foregoing method embodiment, and details are not repeated here.
  • the division of modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • the communication device when the integrated module can be implemented in the form of hardware, the communication device may be as shown in FIG. 10, and the communication device may be an IAB node, an IAB donor, or a chip in an access network device.
  • the communication device may include a processor 1001, a communication interface 1002, and a memory 1003.
  • the processing unit 901 may be a processor 1001.
  • the transceiver unit 902 may be a communication interface 1002.
  • the processor 1001 can be used to call the communication interface 1002 to receive system messages; the processor 1001 can be used to obtain a cell list, and can also be used to select a cell that supports the IAB function to initiate random Access.
  • the processor 1001 may generate a system message, and the processor 1001 may be used to call the communication interface 1002 to send the system message to the IAB node.
  • the processor 1001 may be configured to call the communication interface 1002 to receive a first message from the first IAB node, where the first message includes instruction information, and the instruction information is used Indicates that the first IAB node is an IAB node. And send a second message to the first IAB node, where the second message includes a cell list, and the cell list includes one or more cells that support the IAB function.
  • the processor 1001 may also be configured to execute other corresponding steps in the foregoing method embodiment. For details, refer to the foregoing method embodiment, and details are not repeated here.
  • the processor 1001 may include, but is not limited to, at least one of the following: central processing unit (CPU), microprocessor, digital signal processor (DSP), microcontroller (microcontroller unit, MCU), or artificial intelligence processing
  • CPU central processing unit
  • DSP digital signal processor
  • MCU microcontroller unit
  • artificial intelligence processing Various computing devices that run software, such as a computer, and each computing device may include one or more cores for executing software instructions for calculation or processing.
  • the processor can be a single semiconductor chip, or it can be integrated with other circuits to form a semiconductor chip. For example, it can form an SoC (on-chip) with other circuits (such as codec circuits, hardware acceleration circuits, or various bus and interface circuits).
  • the processor can also include necessary hardware accelerators, such as field programmable gate array (FPGA) and PLD (programmable logic device) , Or a logic circuit that implements dedicated logic operations.
  • FPGA field programmable gate array
  • PLD programmable logic device
  • the memory 1003 can include at least one of the following types: read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or Other types of dynamic storage devices that store information and instructions may also be electrically erasable programmable read-only memory (EEPROM).
  • read-only memory read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , A magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • a magnetic disk storage medium or other magnetic storage device or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the processor 1001 is configured to execute the program code stored in the memory 1003, and is specifically configured to execute the actions of the above-mentioned processing unit 901, which will not be repeated in this application.
  • connection medium between the aforementioned communication interface 1001, the processor 1002, and the memory 1003 is not limited in the embodiment of the present application.
  • the memory 1003, the processor 1002, and the communication interface 1001 are connected by a bus 1004.
  • the bus is represented by a thick line in FIG. 10, and the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. 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 embodiment of the present application provides a computer storage medium storing a computer program, and the computer program includes instructions for executing the communication method provided in the foregoing embodiment.
  • the embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the communication method provided in the foregoing embodiments.
  • An embodiment of the present application also provides a chip, which includes a processor and an interface circuit, the interface circuit is coupled to the processor, and the processor is used to run a computer program or instruction to implement the above-mentioned communication method.
  • the interface circuit is used for Communicate with modules other than the chip.
  • the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present 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, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, 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.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Abstract

本申请提供一种通信方法及装置。该方法为：第一接入回传一体化IAB节点接收系统消息，该系统消息包括小区列表，小区列表中包含一个或多个支持IAB功能的小区，该第一IAB节点获取该小区列表。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2019年04月30日提交中国专利局、申请号为201910364608.5、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
第五代移动通信系统(the fifth generation，5G)新无线(new radio，NR)技术能够使用更大的带宽，例如可以使用毫米波频段，并且可以应用大规模天线和多波束系统，因此5G能够提供更高的系统速率。这为在5G中应用接入回传一体化(integrated access and backhaul，IAB)节点提供了条件。IAB节点中集成了无线接入链路和无线回程链路，其中无线接入链路为用户设备(user equipment，UE)与IAB节点之间通信链路，无线回程链路为IAB节点之间的通信链路，以及IAB节点和IAB宿主之间的通信链路，用于进行数据回传。因此IAB节点不需要有线传输网络进行数据回传，IAB节点更容易部署在密集场景，减轻了部署有线传输网络的负担。
当IAB节点启动后，将进行小区选择接入网络。目前网络中有些小区能够支持IAB功能，有些小区不支持IAB功能。IAB节点在接入不支持IAB功能的小区时不能正常使用IAB功能。
发明内容
本申请实施例提供一种通信方法及装置，用以提高IAB节点接入支持IAB功能的小区的成功率，提高使用IAB功能的成功率。
本申请实施例提供的具体技术方案如下：
第一方面，提供一种通信方法，该方法通过以下方式实现：第一接入回传一体化IAB节点接收系统消息，所述系统消息包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区；第一IAB节点获取所述小区列表。这样，IAB节点通过读取小区广播的系统消息，从系统消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表，提高IAB节点接入支持IAB功能的小区的成功率，提高使用IAB功能的成功率。
在一个可能的设计中，所述第一IAB节点进行小区选择，其中，选择的合适小区为支持IAB功能的小区；或者，所述第一IAB节点进行小区重选，其中，重选的最好小区为支持IAB功能的小区。这样，IAB节点可以按照系统消息中提供的小区列表信息进行小区选择或小区重选，选择或重选的小区为支持IAB节点接入的小区，或支持IAB功能的小区。这样就能减少IAB节点接入小区的时延，提高小区选择或小区重选的效率，有助于IAB技术的实现。
在一个可能的设计中，所述第一IAB节点对所述小区列表中的小区，执行小区选择准则的判决；或者，所述第一IAB节点对所述小区列表中的小区，执行小区重选准则的判决。
在一个可能的设计中，所述第一IAB节点按照小区选择准则进行小区选择，所述小区选择准则包括选择的小区支持IAB功能；或者，所述第一IAB节点按照小区重选准则进行小区重选，所述小区重选的准则包括重选的小区支持IAB功能。
第二方面，提供一种通信方法，该方法通过以下方式实现：所述第一IAB节点从小区接收系统消息；其中，在所述系统消息中包括用于IAB节点随机接入的配置信息时，所述小区支持IAB功能，或者，在所述系统消息中未包括用于IAB节点随机接入的配置信息时，所述小区不支持IAB功能；所述第一IAB节点选择支持IAB功能的小区发起随机接入。这样，IAB节点能够根据小区广播的系统消息，通过系统消息是否携带用于IAB节点随机接入的配置信息来获知该小区是否支持IAB功能，或者获知该小区是否支持IAB节点接入。提高IAB节点接入支持IAB功能的小区的成功率，提高使用IAB功能的成功率。
在一个可能的设计中，所述方法还包括：在所述系统消息中包括用于IAB节点随机接入的配置信息时，所述第一IAB节点对所述小区执行小区选择准则的判决或者对所述小区执行小区重选准则的判决。IAB节点可以在系统消息中携带用于IAB节点随机接入的配置信息时，再对该小区执行小区选择准则或小区重选准则的判断，在该小区符合该小区选择准则时选择该小区作为suitable小区，并驻留到它，或者，在该小区符合该小区重选准则时选择该小区作为最好的小区，并发起随机接入。
第三方面，提供一种通信方法，该方法通过以下方式实现：第一接入回传一体化IAB节点向IAB donor发送第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点；所述第一IAB节点从所述IAB donor接收第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。这样，IAB节点在随机接入过程中，向网络侧指示该节点为IAB节点，网络侧向IAB节点返回包含小区列表的信息的第二消息，这样，IAB节点能够从第二消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。提高IAB节点接入支持IAB功能的小区的成功率，提高使用IAB功能的成功率。
在一个可能的设计中，所述第一消息为无线资源控制RRC建立请求消息，所述第二消息为RRC拒绝消息。
在一个可能的设计中，所述第一IAB节点进行小区选择，其中，选择的合适小区为所述小区列表中的小区；或者，选择的合适小区为支持IAB功能的小区；或者，所述第一IAB节点进行小区重选，其中，重选的小区为所述小区列表中的小区，或者，重选的最好小区为支持IAB功能的小区。这样，IAB节点可以按照小区列表进行小区选择或小区重选，选择或重选的小区为支持IAB节点接入的小区，或支持IAB功能的小区。这样就能减少IAB节点接入小区的时延，提高小区选择或小区重选的效率，有助于IAB技术的实现。
在一个可能的设计中，所述第一IAB节点对所述小区列表中的小区，执行小区选择准则的判决；或者，所述第一IAB节点对所述小区列表中的小区，执行小区重选准则的判决。
在一个可能的设计中，所述第一IAB节点按照小区选择准则进行小区选择；其中，所述小区选择准则包括选择的小区属于所述小区列表中的小区，或者，所述小区选择准则包括选择的小区支持IAB功能；或者，所述第一IAB节点按照小区重选准则进行小区重选；其中，所述小区重选的准则包括重选的小区属于所述小区列表中的小区，或者，所述小区 重选的准则包括重选的小区支持IAB功能。
在一个可能的设计中，所述第一IAB节点向所述IAB donor发送第三消息，所述第三消息用于指示所述第一IAB节点下的小区是否支持IAB功能的信息。
为了解决IAB donor无法获得管理的小区是否支持IAB功能的问题，第四方面，提供一种通信方法：第一IAB节点生成第一消息，所述第一消息包括第一指示信息，所述第一指示信息用于指示所述第一IAB节点下的小区是否支持IAB功能；所述第一IAB节点向IAB donor发送所述第一消息，其中，第一IAB节点为IAB donor DU或者IAB节点。这样，IABdonor能够获知小区是否支持IAB功能的信息。方便对附着的IAB节点进行RRC控制以及随机接入控制。
在一个可能的设计中，所述第一IAB节点从操作维护管理OAM服务器接收所述第一指示信息。
在一个可能的设计中，所述第一IAB节点从第二IAB节点接收第二消息，所述第二消息中包括第二指示信息，所述第二指示信息用于指示所述第二IAB节点为IAB节点；所述第一IAB节点向所述IAB donor发送第三消息，所述第三消息中包括所述第二指示信息和所述第二IAB节点接入的第一IAB节点下的小区的标识。
在一个可能的设计中，所述第一IAB节点从所述IAB donor接收第四消息，所述第四消息中包括支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息；所述第一IAB节点向所述第二IAB节点转发所述第四消息。
第五方面，提供一种通信方法：接入网设备生成系统消息，所述系统消息包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区；所述接入网设备向接入回传一体化IAB节点发送所述系统消息。这样，使得IAB节点通过读取小区广播的系统消息，从系统消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。并有助于提高使用IAB功能的成功率。
第六方面，提供一种通信方法：IAB donor从第一接入回传一体化IAB节点接收第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点；所述IAB donor向所述第一IAB节点发送第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。这样，使得IAB节点能够从第二消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。并有助于提高使用IAB功能的成功率。
在一个可能的设计中，所述第一消息为无线资源控制RRC建立请求消息，所述第二消息为RRC拒绝消息。
在一个可能的设计中，所述IAB donor从所述第一IAB节点接收第三消息，所述第三消息用于指示所述第一IAB节点下的小区是否支持IAB功能的信息。
第七方面，提供一种通信装置，该装置可以是IAB节点、或接入网设备、或IAB donor，还可以是芯片。该装置具有实现上述第一方面至第四方面中任一实施例的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，该通信装置，包括：处理器、通信接口和存储器。通信接口用于该装置与其他装置之间传输消息和/或数据。该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第一 方面至第四方面中任一所述的通信方法。
第八方面，本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第九方面，本申请还提供一种包括指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十方面，本申请实施例提供了一种芯片，该芯片包括处理器和接口电路，该接口电路和该处理器耦合，该处理器用于运行计算机程序或指令，以实现如第一方面至第七方面中任一方面的方法，该接口电路用于与该芯片之外的其它模块进行通信。
附图说明
图1为本申请实施例中通信系统架构示意图之一；
图2为本申请实施例中通信系统架构示意图之二；
图3为本申请实施例中通信方法之一流程示意图；
图4为本申请实施例中通信方法之二流程示意图；
图5为本申请实施例中通信方法之三流程示意图；
图6为本申请实施例中通信方法之三一种举例的示意图；
图7为本申请实施例中通信方法之三另一种举例的示意图；
图8为本申请实施例中通信方法之四流程示意图；
图9为本申请实施例中通信装置结构示意图之一；
图10为本申请实施例中通信装置结构示意图之二。
具体实施方式
本申请实施例提供一种通信方法及装置，有助于IAB节点选择支持IAB功能的小区接入，从而能够正常实现IAB技术的应用。其中，方法和装置是基于同一构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。本申请实施例的描述中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。本申请中所涉及的至少一个是指一个或多个；涉及的多个，是指两个或两个以上。另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
下面将结合附图，对本申请实施例进行详细描述。
首先对本申请实施例提供的通信方法应用的通信系统架构做一些说明。本申请实施例提供的通信方法可以应用于各种通信系统，例如：第五代(5th Generation，5G)新空口(new radio，NR)通信系统，以及未来的通信系统，如6G系统等。
图1示出了本申请实施例提供的通信方法适用的一种可能的通信系统的架构，参阅图1所示，该通信系统100包括：接入回传一体化(integrated access and backhaul，IAB)节点(node)101。通信系统100还可以包括IAB宿主(donor)102。通信系统100还可以包括核心网和终端。
终端也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端设备、无线通信设备、用户代理或用户装置。本申请的实施例中的终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
类似5G中的网络设备gNB采用集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)分离的架构，一个IAB节点可以包括IAB节点移动终端(mobile terminal，MT)和IAB节点DU两部分。其中，IAB节点MT类似于用户设备(user equipment，UE)的功能，与父节点进行通信，提供数据回传。IAB节点DU类似于gNB中DU的功能，包含物理层(PHY)/媒体接入控制(medium access control，MAC)/无线链路控制(radio link control，RLC)层的功能，与子节点进行通信，为子节点提供接入服务。
在CU-DU分离的架构场景下，一个IAB donor可以包括IAB donor DU和IAB donor CU两部分。其中，IAB donor DU的功能类似于IAB节点DU的功能，包括PHY/MAC/RLC层的功能，用于为该IAB donor下附着的子节点提供接入服务。IAB donor CU用于对其下所有的IAB节点和UE节点进行无线资源控制(radio resource control，RRC)控制。
基于图1所示的通信系统架构，本申请实施例的通信方法可以适用的通信系统架构中可以包括多个IAB节点。图2中以两个IAB节点为例。如图2所示，表达了两跳数据回传的场景。两个IAB节点用IAB节点1和IAB节点2表示。IAB节点2和IAB节点1的功能参见上述图1所示通信系统架构对IAB节点的描述。IAB节点2为IAB节点1的子节点，IAB节点1为IAB donor的子节点。IAB donor对IAB节点1、IAB节点2和终端104进行RRC控制，例如存储这些节点的上下文等。
IAB节点在接入网络时需要进行小区选择和小区重选，小区选择的目的是为了选择一个合适(suitable)小区，小区重选的目的是为了选择一个信号质量最好的小区，以便后续在该小区发起随机接入。IAB节点接入的小区为该IAB节点父节点的DU下的小区。例如，如图2所示，IAB节点2接入IAB节点1的DU下的小区，IAB节点1接入IAB donor的DU下的小区。
本申请中，小区可以包括两种类别。一种是支持IAB功能的小区，或者说支持IAB节点接入的小区，例如，图2中的IAB节点1的DU下的小区能够支持IAB节点2的接入，又例如，IAB donor的DU下的小区能够支持IAB节点1的接入。另一种是普通小区，普通小区仅能够支持普通终端的接入，而不能支持IAB节点接入，或者说该小区不能支持IAB功能。
IAB节点在扫描频点时，可能会扫描到一些不支持IAB功能的小区，当IAB节点接入不支持IAB功能的小区时，会触发重新接入小区的流程，从而导致接入时延的增长，影响通信质量。本申请实施例提供的通信方法，能够有助于IAB节点获知哪些小区支持IAB功能或者说哪些小区支持IAB节点接入，当IAB节点在小区选择或者小区重选时，就可以参考这些小区进行驻留，从而提高小区选择和小区重选的效率，并有助于IAB技术的实现。
本申请中，所描述的“支持IAB功能”可以等价替换为“支持IAB节点接入”，两种 描述方式所表达的意思是一致的。比如，一个小区支持IAB功能，意味着该小区支持IAB节点接入。当然，“支持IAB功能”还可以替换为其它类似表达小区能力的说法，本申请中不作限定。
下面对本申请实施例提供的通信方法做详细描述。
如图3所示，本申请实施例提供的通信方法之一的具体流程如下所述。
S301、小区广播系统消息，IAB节点接收系统消息。
小区为接入网设备下的小区，可以是IAB节点下的小区，也可以是普通基站(例如gNB)下的小区。IAB节点在空闲态时，需要进行小区选择，或者已经选择一个驻留小区的情况下可能进行小区重选。IAB节点在执行小区选择或小区重选之前，需要监听小区广播的系统消息。
S302、IAB节点从系统消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。
其中，系统消息中包括小区列表，小区列表中包括一个或多个小区，且小区列表中的小区为支持IAB节点接入的小区或者支持IAB功能的小区。IAB节点接收到系统消息后，从系统消息中能够获取到支持IAB节点接入的小区列表或者支持IAB功能的小区列表。
本申请实施例中，任何小区都可以广播携带其周围支持IAB节点接入的小区的列表信息或者其周围支持IAB功能的小区的列表信息。例如，该小区的列表信息可以携带于系统消息的SIB1中，能够使得IAB节点更早的从系统消息中获得该小区的列表信息。以图2所示的系统架构为例，假设接收系统消息的IAB节点为IAB节点2，则广播系统消息的小区可以是IAB节点1的DU下的小区，当然也可以是其他不支持IAB功能的小区。假设接收系统消息的IAB节点为IAB节点1，则广播系统消息的小区可以是IAB donor的DU下的小区，当然也可以是其他不支持IAB功能的小区。
通过上述步骤，IAB节点能够获知支持IAB节点接入的小区列表或者支持IAB功能的小区列表，在小区选择和小区重选过程中，可以仅对小区列表中的小区执行小区选择或小区重选流程。
可选的，在S302之后，还可以包括小区选择或小区重选的步骤。
S303、IAB节点进行小区选择。
IAB节点在进行小区选择时要参考该上述获得的该小区列表，也就是说，IAB节点小区选择得到的suitable小区为该小区列表中的小区，或者，IAB节点小区选择得到的suitable小区为支持IAB功能的小区，或者为支持IAB节点接入的小区。
具体来说，IAB节点在开机后，需要进行初始小区选择。IAB节点根据自身的能力进行频点扫描。
IAB节点仅对扫描到的属于该小区列表中的小区，执行小区选择准则的判决。或者，IAB节点对扫描到的小区先进行小区选择准则的判决，若符合小区选择准则，再进一步判断该符合小区选择准则的小区是否在该小区列表中，只有在该小区列表中的情况下，IAB节点才会将该小区作为suitable小区，并驻留到它。其中，这里的小区选择准则可以参考现有的小区选择准则的描述，例如，小区选择准则为现有的S准则。IAB节点通过测量获得小区的测量结果，通过小区的系统信息及自身能力获得S准则公式中的各个参数，并判断S准则公式是否成立，若成立则符合S准则。符合S准则的小区能够满足小区选择的信道质量要求。
例如，S准则的具体内容如下：
Srxlev>0AND Squal>0
其中，
Srxlev＝Q rxlevmeas–(Q rxlevmin+Q rxlevminoffset)–P compensation-Qoffset temp
Squal＝Q qualmeas–(Q qualmin+Q qualminoffset)-Qoffset temp
式中各参数的含义参见3GPP协议TS38.304中v15.3.0版本中的5.2.3.2章节，这里就不再赘述。
只有当表1中Srxlev和Squal的测量值都满足条件，则说明该小区满足小区选择准则。
或者，IAB节点对扫描到的小区按照新的小区选择准则进行小区选择准则的判决。新的小区选择准则在现有的小区选择准则的基础上，还要参考一条新的条件，即选择的小区需要支持IAB功能，或者支持IAB节点的接入。IAB节点只有在判定小区满足新的小区选择准则时，才会选择该小区进行驻留。本申请中，小区重选准则可以与小区选择准则等同。
S304、IAB节点进行小区重选。
该步骤可以与S303相互独立。也可以在S303之后执行。
IAB节点进行小区选择后，驻留到suitable小区，并读取该小区的系统广播，以便获取小区重选相关的参数信息。其中，该小区的系统消息中包括支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。IAB节点接收到系统消息后，从系统消息中能够获取到支持IAB节点接入的小区列表或者支持IAB功能的小区列表。
与小区选择类似，IAB节点仅对扫描到的小区中在该小区列表中的小区，执行小区重选准则的判决。或者，IAB节点对扫描到的小区先进行小区重选准则的判决，若符合小区重选准则，再进一步判断该符合小区重选准则的小区是否在该小区列表中，只有在该小区列表中的情况下，IAB节点才会将该小区作为最好小区，驻留到它，并在该小区发起随机接入。例如，小区重选准则为R准则。IAB节点通过测量获得各个小区的测量结果，通过各个小区的系统信息及自身能力获得S准则公式中的各个参数，获得各个小区的S值。对各个小区根据信道质量的高低进行R准则排序，选择最优小区。
例如，R准则的具体内容如下：
R s＝Q meas,s+Q hyst-Qoffset temp
R n＝Q meas,n-Qoffset-Qoffset temp
其中，式中各参数的含义参见3GPP协议TS38.304的v15.3.0版本中的5.2.4.6章节，这里就不再赘述。
上述Rs是服务小区的测量值，Rn是邻居小区的测量值。只有在指定时间内，该邻居小区的测量值Rn一直比服务小区的测量值Rs都要好，则说明该小区满足小区重选择准则。
或者，IAB节点对扫描到的小区按照新的小区重选准则进行小区重选准则的判决。新的小区重选准则在现有的小区重选准则的基础上，还要参考一条新的条件，即重选小区需要支持IAB功能，或者支持IAB节点的接入。IAB节点只有在判定小区满足新的小区重选准则时，才会选择该小区进行接入。
通过本实施例提供的通信方法之一，IAB节点通过读取小区广播的系统消息，从系统消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。
进一步的，IAB节点可以按照系统消息中提供的小区列表信息进行小区选择或小区重 选，选择或重选的小区为支持IAB节点接入的小区，或支持IAB功能的小区。这样就能减少IAB节点接入小区的时延，提高小区选择或小区重选的效率，有助于IAB技术的实现。
基于同一发明构思，如图4所示，本申请实施例提供的通信方法之二的具体流程如下所述。
S401、小区广播系统消息，IAB节点接收扫描到的小区广播的系统消息。
以图2所示的系统架构为例，假设接收系统消息的IAB节点为IAB节点2，则广播系统消息的小区可以是IAB节点1的DU下的小区。假设接收系统消息的IAB节点为IAB节点1，则广播系统消息的小区可以是IAB donor的DU下的小区。
IAB节点可以通过系统消息中是否携带随机接入的配置信息，来判断该小区是否支持IAB功能或者判断该小区是否支持IAB节点的接入。
其中，IAB节点随机接入的配置信息与UE随机接入的配置信息不同，因此，在系统消息中包括用于IAB节点随机接入的配置信息时，该小区支持IAB功能或者该小区支持IAB节点的接入；或者，在系统消息中未包括用于IAB节点随机接入的配置信息时，该小区不支持IAB功能或者该小区不支持IAB节点的接入。
S402、IAB节点选择支持IAB功能或者支持IAB节点的接入的小区发起随机接入。
IAB节点根据小区广播的系统消息判断该小区是否支持IAB功能，或者支持IAB节点的接入。在系统消息中包括用于IAB节点随机接入的配置信息时，该IAB节点对小区执行小区选择准则的判决或者对小区执行小区重选准则的判决。在该小区符合小区选择准则时选择该小区作为suitable小区，并驻留到它；或者，在该小区符合小区重选准则时重选该小区作为最好的小区，并发起随机接入。
通过本实施例提供的通信方法之二，IAB节点能够根据小区广播的系统消息，通过系统消息是否携带用于IAB节点随机接入的配置信息来获知该小区是否支持IAB功能，或者获知该小区是否支持IAB节点接入。
进一步的，IAB节点可以在系统消息中携带用于IAB节点随机接入的配置信息时，再对该小区执行小区选择准则或小区重选准则的判断，在该小区符合该小区选择准则时选择该小区作为suitable小区，并驻留到它，或者，在该小区符合该小区重选准则时选择该小区作为最好的小区，并发起随机接入。
基于同一发明构思，如图5所示，本申请实施例提供的通信方法之三的具体流程如下所述。该方法涉及IAB节点与IAB donor之间的交互。
S501、IAB节点向IAB donor发送第一消息，IAB donor从IAB节点接收该第一消息。
如果存在两个IAB节点之间的交互以及与IAB donor之间的交互，为做区分，这里的IAB节点可以称为第一IAB节点。
其中，第一消息包括指示信息，指示信息用于指示第一IAB节点为IAB节点，即指示该第一IAB节点的类型为IAB节点，这里的类型为与普通终端作区分的节点。
S502、IAB donor向第一IAB节点返回第二消息，第一IAB节点接收来自IAB donor的第二消息。
第二消息中包括支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。
以图2所示的系统架构为例，假设第一IAB节点为IAB节点1，则第一IAB节点与IAB donor直接连接。第一IAB节点向IAB donor发送第一消息，IAB donor从第一IAB节 点接收第一消息，IAB donor向第一IAB节点返回第二消息。具体地，第一IAB节点中的MT向IAB donor的DU发送该第一消息，IAB donor的DU将该第一消息封装成F1AP消息后转发爱给IAB donor的CU。IAB donor的CU向IAB donor的DU返回携带第二消息的F1AP消息，IAB donor的DU从IAB donor的CU接收包含第二消息的F1AP消息后，向第一IAB节点的MT返回第二消息。
假设第一IAB节点为IAB节点2，则IAB节点2需要通过IAB节点1向IAB donor发送第一消息，并通过IAB节点1从IAB donor接收第二消息。具体地，IAB节点2的MT向IAB节点1的DU发送第一消息，IAB节点1的DU将该第一消息封装成F1AP消息后转发给IAB donor的CU。IAB donor的CU向IAB节点1的DU返回携带第二消息的F1AP消息，IAB节点1的DU从IAB donor的CU接收包含第二消息的F1消息后，向IAB节点2返回第二消息。
在一种可能的实现方式中，第一消息和第二消息为随机接入过程中发送的消息。例如，第一消息为RRC建立请求setup request消息，所述第二消息为RRC拒绝reject消息。
以图2所示的系统架构为例，假设第一IAB节点为IAB节点1，则第一IAB节点与IAB donor直接连接。如图6所示，IAB节点1的MT向IAB donor DU下的小区发送随机接入前导码，IAB donor DU下的小区向IAB节点1的MT返回随机接入响应，IAB节点1的MT向IAB donor DU发送RRC连接建立请求消息(或RRC建立请求消息)，IAB donor DU将该RRC连接建立请求消息封装在F1AP消息中发送到IAB donor CU，IAB donor CU从收到的F1AP消息中提取出RRC连接建立请求消息，该RRC连接建立请求消息中携带IAB节点的指示信息。IAB donor CU生成RRC拒绝消息，并将该RRC拒绝消息封装在F1AP消息中发送到IAB donor DU，IAB donor DU从该F1AP消息中提取出RRC拒绝消息后，将该RRC决绝消息发送刚给IAB节点1的MT，IAB节点1的MT从IAB donor DU接收RRC拒绝消息。该RRC拒绝消息中包括支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。
以图2所示的系统架构为例，假设第一IAB节点为IAB节点2，则IAB节点2需要通过IAB节点1向IAB donor发送第一消息，并通过IAB节点1从IAB donor接收第二消息。如图7所示，IAB节点2的MT向IAB节点1的DU发送随机接入前导码，IAB节点1的DU从IAB节点2的MT接收随机接入前导码。IAB节点1的DU向IAB节点2的MT返回随机接入响应。IAB节点2的MT向IAB节点1的DU发送RRC连接建立请求消息，IAB节点1的DU将连接建立请求消息封装成F1AP消息后转发给IAB donor的CU，该连接建立请求消息中携带IAB节点的指示信息。IAB donor的CU向IAB节点1的DU返回携带包含RRC拒绝消息的F1AP消息，IAB节点1的DU从IAB donor的CU接收包含RRC拒绝消息的F1AP消息后，向IAB节点2返回RRC拒绝消息，该RRC拒绝消息中携带支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。
第一IAB节点的MT在接收到第二消息后，根据第二消息中包含的支持IAB节点接入的小区的列表信息，确定支持IAB节点接入的小区列表；或者说，根据第二消息中包含的支持IAB功能的小区的列表信息，确定支持IAB功能的小区列表。
在S502之后，还可以执行S503和S504步骤，也可以只执行S503或者S504步骤。
S503、IAB节点的MT进行小区选择。
IAB节点的MT在进行小区选择时要参考该上述获得的该小区列表。IAB节点的MT 选择接入的小区为该小区列表中的小区。
具体来说，IAB节点的MT在收到RRC拒绝消息后，要重新选择小区。IAB节点的MT进行频点扫描。
IAB节点的MT仅对扫描到的小区中在该小区列表中的小区，执行小区选择准则的判决。或者，IAB节点的MT对扫描到的小区先进行小区选择准则的判决，若符合小区选择准则，再进一步判断该符合小区选择准则的小区是否在该小区列表中，只有在该小区列表中的情况下，才会选择该小区进行接入。其中，这里的小区选择准则可以参考S303中描述的现有的小区选择准则。
或者，IAB节点对扫描到的小区按照新的小区选择准则进行小区选择准则的判决。新的小区选择准则在现有的小区选择准则的基础上，还要参考一条新的条件，即选择的小区属于该小区列表中的小区。IAB节点只有在判定小区满足新的小区选择准则时，才会选择该小区进行接入。本申请中，小区重选准则可以与小区选择准则等同。
S504、IAB节点进行小区重选。
该步骤可以与S503相互独立。也可以在S503之后执行。
IAB节点的MT进行小区重选可以在小区选择之后。IAB节点的MT选择初始接入的小区可以按照S503来执行。或者，IAB节点的MT按照RRC拒绝消息中携带的小区列表信息直接进行小区重选过程。
与小区选择类似，IAB节点仅对扫描到的小区中在该小区列表中的小区，执行小区重选准则的判决。或者，IAB节点对扫描到的小区先进行小区重选准则的判决，若符合小区重选准则，再进一步判断该符合小区重选准则的小区是否在该小区列表中，只有在该小区列表中的情况下，才会选择该小区进行接入。其中，这里的小区重选准则可以参考S304中描述的现有的小区重选准则。
或者，IAB节点对扫描到的小区按照新的小区重选准则进行小区重选准则的判决。新的小区重选准则在现有的小区重选准则的基础上，还要参考一条新的条件，即选择的小区属于该小区列表中的小区。IAB节点只有在判定小区满足新的小区重选准则时，才会选择该小区进行接入。
通过本实施例提供的通信方法之一，IAB节点在随机接入过程中，向网络侧指示该节点为IAB节点，网络侧向IAB节点返回包含小区列表的信息的第二消息，这样，IAB节点能够从第二消息中获取支持IAB节点接入的小区列表或者支持IAB功能的小区列表。
进一步的，IAB节点可以按照小区列表进行小区选择或小区重选，选择或重选的小区为支持IAB节点接入的小区，或支持IAB功能的小区。这样就能减少IAB节点接入小区的时延，提高小区选择或小区重选的效率，有助于IAB技术的实现。
基于同一发明构思，如图8所示，本申请实施例提供的通信方法之四的具体流程如下所述。
S801、IAB节点生成第一消息。
其中，第一消息用于指示该IAB节点下的小区是否支持IAB功能，或者，该第一消息用于指示该IAB节点下的小区是否支持IAB节点接入。
IAB节点可以从操作维护管理(operation administration and maintenance，OAM)接收指示信息，指示信息用于指示该IAB节点下的小区是否支持IAB功能，或者，该指示信息用于指示该IAB节点下的小区是否支持IAB节点接入。IAB节点通过从OAM接收的指示 信息，生成第一消息。
S802、IAB节点向IAB donor发送第一消息，IAB donor从IAB节点接收第一消息。
这样，IAB donor就能获取IAB节点下的小区是否支持IAB功能的信息或者是否支持IAB节点接入的信息。IAB donor下的任意IAB节点的小区都可以通过上述方法向IAB donor上报能力。IAB donor获取并存储其下所有IAB节点上报的小区能力信息。
进一步的，当有IAB节点在随机接入过程中发送消息来指示其为IAB节点时，IAB donor就可以根据存储的各个IAB节点的小区能力信息，向发起随机接入的IAB节点返回支持IAB能力的小区的列表信息。这样，就可以有助于提高IAB节点的小区选择或小区重选效率。
同理，上述方案同样适用于IAB donor DU下的小区，即IAB donor DU从OAM服务器接收指示信息，指示信息用于指示该IAB donor DU下的小区是否支持IAB功能，或者，该指示信息用于指示该IAB donor DU下的小区是否支持IAB节点接入。IAB donor DU获取到该指示信息后，生成第一消息并发送到IAB donor CU，以便将IAB donor DU小区是否支持IAB功能或者是否支持IAB节点接入的信息进一步通知IAB donor CU。
上述S801～S802的IAB节点记为第一IAB节点，可选的，结合上述通信方法之三，本实施例提供的通信方法之四还可以包括以下步骤。
S803、第二IAB节点MT向第一IAB节点DU发送第二消息，第一IAB节点DU从第二IAB节点MT接收第二消息。
第二消息中包括指示信息，指示信息用于指示第二IAB节点MT为IAB节点；
S804、第一IAB节点DU向IAB donor CU发送第三消息，IAB donor CU接收第一IAB节点DU发送的第三消息。
第三消息中包括S803所述的指示信息和第二IAB节点MT接入的第一IAB节点DU下的小区的标识。
S805、IAB donor CU向第一IAB节点DU发送第四消息，第一IAB节点DU从IAB donor CU接收第四消息。
IAB donor CU根据各个IAB节点DU上报的小区能力信息，在第四消息中携带支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。
即，第四消息中包括支持IAB节点接入的小区的列表信息或者支持IAB功能的小区的列表信息。
S806、第一IAB节点DU向第二IAB节点MT转发第四消息，第二IAB节点MT从第一IAB节点DU接收该第四消息。
或者第一IAB节点向第二IAB节点发送第五消息，第二IAB节点从第一IAB节点接收该第五消息，在第五消息中携带第四消息包含的内容。
S803～S806的其它描述可以参考上述通信方法之三，在此不再赘述。
本申请中，若是IAB节点DU从另一个IAB节点MT接收消息，将该消息转发给IAB donor CU，则将该消息进行封装，生成F1AP消息后转发。类似的，IAB donor CU向IAB节点DU发送的F1AP消息，该IAB节点DU解析后，从F1AP消息中提取出RRC消息后转发给其他IAB节点MT。
本申请实施例上述提供的通信方法一至通信方法之四的各个方法，能够独立形成本申请需要保护的方案，也能够结合形成本申请需要保护的方案。例如，通信方法之三的基础 上还可以结合通信方法之四的方案。即在通信方法之三的基础上，还可以进一步的包括IAB节点向IAB donor上报能力的方法。
基于同一发明构思，如图9所示，本申请实施例还提供了通信装置，该通信装置用于执行上述任意一种通信方法，该通信装置包括处理单元901以及收发单元902。
例如，该通信装置用于执行IAB节点所执行的操作时，收发单元902用于接收系统消息；处理单元901用于获取小区列表，还可以用于选择支持IAB功能的小区发起随机接入。
例如，该通信装置用于执行接入网设备所执行的操作时，处理单元901用于生成系统消息，收发单元902用于向IAB节点发送该系统消息。
例如，该通信装置用于执行IAB donor所执行的操作时，收发单元902用于从第一IAB节点接收第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点。并向所述第一IAB节点发送第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。
处理单元901以及收发单元902还可以用于执行上述方法实施例中对应的其他步骤，具体可以参阅上述方法实施例，这里不再重复赘述。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
其中，集成的模块既可以采用硬件的形式实现时，通信装置可以如图10所示，该通信装置可以是IAB节点、IAB donor或接入网设备中的芯片。该通信装置可以包括处理器1001，通信接口1002，存储器1003。其中，处理单元901可以为处理器1001。收发单元902可以为通信接口1002。
该通信装置用于执行IAB节点所执行的操作时，处理器1001可以用于调用通信接口1002接收系统消息；处理器1001可以用于获取小区列表，还可以用于选择支持IAB功能的小区发起随机接入。
例如，该通信装置用于执行接入网设备所执行的操作时，处理器1001可以生成系统消息，处理器1001可以用于调用通信接口1002向IAB节点发送该系统消息。
例如，该通信装置用于执行IAB donor所执行的操作时，处理器1001可以用于调用通信接口1002从第一IAB节点接收第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点。并向所述第一IAB节点发送第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。
处理器1001还可以用于执行上述方法实施例中对应的其他步骤，具体可以参阅上述方法实施例，这里不再重复赘述。
处理器1001可以包括但不限于以下至少一种：中央处理单元(central processing unit，CPU)、微处理器、数字信号处理器(DSP)、微控制器(microcontroller unit，MCU)、或人工智能处理器等各类运行软件的计算设备，每种计算设备可包括一个或多个用于执行软件指令以进行运算或处理的核。该处理器可以是个单独的半导体芯片，也可以跟其他电路一起集成为一个半导体芯片，例如，可以跟其他电路(如编解码电路、硬件加速电路或各种总线和接口电路)构成一个SoC(片上系统)，或者也可以作为一个ASIC的内置处理器集成在所述ASIC当中，该集成了处理器的ASIC可以单独封装或者也可以跟其他电路封 装在一起。该处理器除了包括用于执行软件指令以进行运算或处理的核外，还可进一步包括必要的硬件加速器，如现场可编程门阵列(field programmable gate array，FPGA)、PLD(可编程逻辑器件)、或者实现专用逻辑运算的逻辑电路。
存储器1003，可以包括如下至少一种类型：只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmabler-only memory，EEPROM)。在某些场景下，存储器还可以是只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器1001用于执行存储器1003存储的程序代码，具体用于执行上述处理单元901的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口1001、处理器1002以及存储器1003之间的具体连接介质。本申请实施例在图10中以存储器1003、处理器1002以及通信接口1001之间通过总线1004连接，总线在图10中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本申请实施例提供了一种计算机存储介质，存储有计算机程序，该计算机程序包括用于执行上述实施例提供的通信方法的指令。
本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述实施例提供的通信方法。
本申请实施例还提供了一种芯片，该芯片包括处理器和接口电路，该接口电路和该处理器耦合，该处理器用于运行计算机程序或指令，以实现上述通信方法，该接口电路用于与该芯片之外的其它模块进行通信。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (22)

  1. 一种通信方法，其特征在于，包括：
    第一接入回传一体化IAB节点接收系统消息，所述系统消息包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区；
    第一IAB节点获取所述小区列表。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一IAB节点进行小区选择，其中，选择的合适小区为支持IAB功能的小区；或者，
    所述第一IAB节点进行小区重选，其中，重选的最好小区为支持IAB功能的小区。
  3. 如权利要求2所述的方法，其特征在于，所述第一IAB节点进行小区选择，包括：
    所述第一IAB节点对所述小区列表中的小区，执行小区选择准则的判决；
    或者，
    所述第一IAB节点进行小区重选，包括：
    所述第一IAB节点对所述小区列表中的小区，执行小区重选准则的判决。
  4. 如权利要求2所述的方法，其特征在于，所述第一IAB节点进行小区选择，包括：
    所述第一IAB节点按照小区选择准则进行小区选择，所述小区选择准则包括选择的小区支持IAB功能；
    或者，
    所述第一IAB节点进行小区重选，包括：
    所述第一IAB节点按照小区重选准则进行小区重选，所述小区重选的准则包括重选的小区支持IAB功能。
  5. 一种通信方法，其特征在于，包括：
    所述第一IAB节点从小区接收系统消息；
    其中，在所述系统消息中包括用于IAB节点随机接入的配置信息时，所述小区支持IAB功能，或者，在所述系统消息中未包括用于IAB节点随机接入的配置信息时，所述小区不支持IAB功能；
    所述第一IAB节点选择支持IAB功能的小区发起随机接入。
  6. 如权利要求5所述的方法，其特征在于，所述方法还包括：
    在所述系统消息中包括用于IAB节点随机接入的配置信息时，所述第一IAB节点对所述小区执行小区选择准则的判决或者对所述小区执行小区重选准则的判决。
  7. 一种通信方法，其特征在于，包括：
    第一接入回传一体化IAB节点向IAB宿主donor发送第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点；
    所述第一IAB节点从所述IAB donor接收第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。
  8. 如权利要求7所述的方法，其特征在于，所述第一消息为无线资源控制RRC建立请求消息，所述第二消息为RRC拒绝消息。
  9. 如权利要求7或8所述的方法，其特征在于，所述方法还包括：
    所述第一IAB节点进行小区选择，其中，选择的合适小区为所述小区列表中的小区； 或者，选择的合适小区为支持IAB功能的小区；
    或者，
    所述第一IAB节点进行小区重选，其中，重选的小区为所述小区列表中的小区，或者，重选的最好小区为支持IAB功能的小区。
  10. 如权利要求9所述的方法，其特征在于，所述第一IAB节点进行小区选择，包括：
    所述第一IAB节点对所述小区列表中的小区，执行小区选择准则的判决；
    或者，
    所述第一IAB节点进行小区重选，包括：
    所述第一IAB节点对所述小区列表中的小区，执行小区重选准则的判决。
  11. 如权利要求9所述的方法，其特征在于，所述第一IAB节点进行小区选择，包括：
    所述第一IAB节点按照小区选择准则进行小区选择；其中，所述小区选择准则包括选择的小区属于所述小区列表中的小区，或者，所述小区选择准则包括选择的小区支持IAB功能；
    或者，
    所述第一IAB节点进行小区重选，包括：
    所述第一IAB节点按照小区重选准则进行小区重选；其中，所述小区重选的准则包括重选的小区属于所述小区列表中的小区，或者，所述小区重选的准则包括重选的小区支持IAB功能。
  12. 如权利要求7～11任一项所述的方法，其特征在于，所述方法还包括：
    所述第一IAB节点向所述IAB donor发送第三消息，所述第三消息用于指示所述第一IAB节点下的小区是否支持IAB功能的信息。
  13. 一种通信方法，其特征在于，包括：
    接入网设备生成系统消息，所述系统消息包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区；
    所述接入网设备向接入回传一体化IAB节点发送所述系统消息。
  14. 一种通信方法，其特征在于，包括：
    IAB宿主donor从第一接入回传一体化IAB节点接收第一消息，所述第一消息包括指示信息，所述指示信息用于指示所述第一IAB节点为IAB节点；
    所述IAB donor向所述第一IAB节点发送第二消息，所述第二消息中包括小区列表，所述小区列表中包含一个或多个支持IAB功能的小区。
  15. 如权利要求14所述的方法，其特征在于，所述第一消息为无线资源控制RRC建立请求消息，所述第二消息为RRC拒绝消息。
  16. 如权利要求14或15所述的方法，其特征在于，所述IAB donor从所述第一IAB节点接收第三消息，所述第三消息用于指示所述第一IAB节点下的小区是否支持IAB功能的信息。
  17. 一种通信方法，其特征在于，所述方法包括：
    第一接入回传一体化IAB节点生成第一消息，所述第一消息包括第一指示信息，所述第一指示信息用于指示所述第一IAB节点下的小区是否支持IAB功能；
    所述第一IAB节点向IAB宿主donor发送所述第一消息；
    其中，第一IAB节点为IAB节点；或者所述第一IAB节点为IAB donor分布式单元 DU，且所述IAB donor为IAB donor集中式单元CU。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    所述第一IAB节点从操作维护管理OAM服务器接收所述第一指示信息。
  19. 一种通信方法，其特征在于，所述方法包括：
    接入回传一体化IAB宿主donor从第一IAB节点接收第一消息，所述第一消息包括第一指示信息，所述第一指示信息用于指示所述第一IAB节点下的小区是否支持IAB功能；
    所述IAB donor获取所述第一IAB节点下的小区是否支持IAB功能；
    其中，所述第一IAB节点为IAB节点；或者所述第一IAB节点为IAB donor分布式单元DU，所述IAB donor为IAB donor集中式单元CU。
  20. 一种通信装置，其特征在于，包括处理器，所述处理器和存储器耦合，所述存储器中存储有指令；
    所述处理器执行所述指令时，使所述装置执行权利要求1至4任一项所述的方法；
    或者，所述处理器执行所述指令时，使所述装置执行权利要求5或6所述的方法；
    或者，所述处理器执行所述指令时，使所述装置执行权利要求7至12任一项所述的方法；
    或者，所述处理器执行所述指令时，使所述装置执行权利要17至18任一项所述的方法。
  21. 一种通信装置，其特征在于，包括处理器，所述处理器和存储器耦合，所述存储器中存储有指令；
    所述处理器执行所述指令时，使所述装置执行权利要求13所述的方法；
    或者，所述处理器执行所述指令时，使所述装置执行权利要14至16任一项所述的方法；
    或者，所述处理器执行所述指令时，使所述装置执行权利要19任一项所述的方法。
  22. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储程序，所述程序在被一个或多个处理器读取并执行时可实现权利要求1至4任一项所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求5或6所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求7至12任一项所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求13所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求14至16任一项所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求17至18任一项所述的方法；或者，所述程序在被一个或多个处理器读取并执行时可实现权利要求19所述的方法。
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