WO2020029777A1

WO2020029777A1 - Resource configuration method and apparatus

Info

Publication number: WO2020029777A1
Application number: PCT/CN2019/097026
Authority: WO
Inventors: 刘凤威; 陈磊
Original assignee: 华为技术有限公司
Priority date: 2018-08-10
Filing date: 2019-07-22
Publication date: 2020-02-13
Also published as: CN110831187A; CN110831187B

Abstract

The present application provides a resource configuration method and apparatus, wherein same relate to the technical field of communications and are used for a relay device to determine, according to scheduling configuration information sent by an upper-level node, resources for communication with a third node, so as to avoid waste caused by reserving PDCCH resources for an access link of a first node on all time slots or sub-frames of a backhaul link or avoid conflict between transmission of the backhaul link and reception of a transmission resource for an uplink signal on the access link. The method comprises: a first node receiving scheduling configuration information from a second node, wherein the scheduling configuration information is used for indicating the position of a start symbol for signal or data transmission performed by the second node on one or more time slots; the first node determining a second communication resource according to the scheduling configuration information, wherein the second communication resource comprises resources for communication with a third node; and the first node communicating with the third node on the second communication resource.

Description

Method and device for resource allocation

This application claims the priority of a Chinese patent application filed on August 10, 2018 with the State Intellectual Property Office of China, application number 201810912232.2, and application name "A Method and Device for Resource Allocation", the entire contents of which are incorporated herein by reference. In this application.

Technical field

The present invention relates to communication technology, and in particular, to a method and an apparatus for resource configuration of a relay node in a wireless communication system.

Background technique

High bandwidth is an inevitable requirement for the development of future wireless networks, including 5th generation mobile communications networks, 5th generation wireless systems, and 5G wireless network new radio interfaces. Because the low frequency band, such as below 6G Hertz (GHz) frequency band, the bandwidth is gradually exhausted, and the high frequency band will become the frequency band choice for wireless networks seeking to use in the future. In the current NR research, high frequency bands (such as 20-30GHz frequency band) and 6G frequency bands are important frequency bands for NR extended bandwidth. On the other hand, the introduction of a relay node (RN) that enhances coverage or throughput is an important means to solve network capacity and coverage extension. The relay is called integrated access and backhaul (IAB) in NR, and the relay node is also called IAB node (IAB node). Compared with the long-term evolution (LTE) relay, IAB in NR requires more flexibility and efficiency. Therefore, the need for LTE relay technology cannot meet the flexibility and efficiency requirements of NR. IAB needs to adopt new technical solutions to Improve the flexibility of access links and backhaul links and improve resource efficiency.

Summary of the invention

Embodiments of the present application provide a method and a device for configuring a relay node resource, which solves the need to reserve downlink scheduling resources for the access links of the relay node for the time slots or subframes of all return links in the relay system. , And the problem of resource waste or resource conflict caused by configuring physical uplink control signaling or sounding reference signals on the last symbol or symbols of the previous slot or subframe.

To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

According to a first aspect, a resource configuration method is provided, including: a first node receives scheduling configuration information of a second node, and the scheduling configuration information is used to instruct a second node to initiate signal or data transmission on one or more time slots; The first node determines the second communication resource according to the scheduling configuration information. The second communication resource includes the resource to communicate with the third node, and the resource to communicate with the third node includes: the first node on one or more time slots. Send the symbol bit occupied by the downlink signal on the access link, or the resource of the physical uplink signal that the first node is allowed to receive on the access link; the first node communicates with the third node on the second communication resource . In the above technical solution, resources are configured by a higher-level node to determine a time slot in which the PDCCH transmission of the access link can be performed, so that some time slots or subframes of the backhaul link can use all resources for signals or data. Transmission, which improves resource utilization. At the same time, through resource configuration, the first node can know which time slot's last symbol or time slot can be configured with uplink signals, such as PUCCH or SRS, to avoid interference caused by collisions.

In a possible implementation manner of the first aspect, the scheduling configuration information includes: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, an indication of a transmission duration, and activation At least one of the starting frame numbers.

In a possible implementation manner of the first aspect, the first node receives a scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information. In the above technical solution, the scheduling information reconfiguration message can be used to reconfigure the PDCCH of the first node's access link, or the time slot or subframe of the uplink signal according to different environments or needs, which can quickly optimize the first node. The configuration of access link resources, and improve the utilization of backhaul link resources, and improve the performance of the access and backhaul links of the relay system.

In a possible implementation manner of the first aspect, positions of the start symbols of at least two timeslots on multiple timeslots are different. In the above technical solution, by using different configurations for different time slots of the backhaul link of the first node, resource allocation can be optimized and resource efficiency can be improved.

In a possible implementation manner of the first aspect, the multiple timeslots include a timeslot configured by the scheduling configuration information and a timeslot configured by the scheduling information reconfiguration message. In the above technical solution, the scheduling configuration information of the time slot is reconfigured through the scheduling information reconfiguration message, which can fully consider the difference in resource requirements of different time relay nodes to optimize system performance.

In a possible implementation manner of the first aspect, the first node sends a resource configuration report to the second node, and the resource configuration report includes at least one of the following information: a physical downlink control signal of the access link of the first node Let the configuration time slot of the PDCCH, the number of symbols occupied by the PDCCH, and the time slot when the first node receives the uplink signal of the access link. In the above technical solution, the first node may notify the second node of changes in resource requirements through a resource configuration report, so that the second node may dynamically update scheduling configuration information, optimize system performance, and improve resource utilization.

In a possible implementation manner of the first aspect, before the first node sends a resource configuration report to the second node, it receives a scheduling configuration request sent by the second node, and the scheduling configuration request is used by the second node to request the first node to send resources. Configuration report. In the above technical solution, the second node triggers the first node to perform a resource configuration report through the scheduling configuration request, so that the second node has a certain degree of flexibility to reconfigure the scheduling configuration information, optimize system performance, and improve resource utilization.

In a possible implementation manner of the first aspect, the scheduling configuration information is carried in physical downlink control signaling PDCCH, or media access control signaling MAC CE, or radio resource control RRC signaling, or F1AP interface protocol, or tunnel Agreement.

In a possible implementation manner of the first aspect, the scheduling configuration information is configured through RRC signaling, and the second node activates the configuration through physical downlink control signaling (PDCCH) or media access control signaling (MAC) CE. In the above technical solution, through the scheduling information reconfiguration message, the PDCCH of the first node access link, or the time slot or subframe of the PUCCH or SRS can be reconfigured according to different environments or needs, which can quickly optimize the first The configuration of the node's access link resources, and the utilization of the return link resources are improved, and the performance of the access and return links of the relay system is improved.

In a second aspect, a resource configuration method is provided, including: a second node determining scheduling configuration information of a first node on a backhaul link, and the scheduling configuration information is used to instruct the second node to perform on one or more time slots The position of the start symbol of the signal or data transmission; the second node sends scheduling configuration information to the first node. In the above technical solution, the upper node configures the resources of the lower node, and can configure the position of the signal or the start symbol of the data transmission for the return link of the first node to improve the resource utilization of the return link.

In a possible implementation manner of the second aspect, the scheduling configuration includes: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, an indication of a transmission duration, and an activated At least one of the start frame numbers.

In a possible implementation manner of the second aspect, the first node receives a scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information. In the above technical solution, by separating configuration and activation, accurate activation of configuration information can be achieved, avoiding conflicts and interference.

In a possible implementation manner of the second aspect, positions of the start symbols of at least two timeslots on multiple timeslots are different. In the above technical solution, by using different configurations for different time slots of the backhaul link of the first node, resource allocation can be optimized and resource efficiency can be improved.

In a possible implementation manner of the second aspect, the multiple timeslots include a timeslot configured by the scheduling configuration information and a timeslot configured by the scheduling information reconfiguration message. In the above technical solution, the scheduling configuration information of the time slot is reconfigured through the scheduling information reconfiguration message, which can fully consider the difference in resource requirements of different time relay nodes to optimize system performance.

In a possible implementation manner of the second aspect, the second node receives a resource configuration report sent by the first node, and the resource configuration report includes at least one of the following information: physical downlink control of the access link of the first node The configuration time slot of the signaling PDCCH, the number of symbols occupied by the PDCCH, and the time slot when the first node receives the uplink signal of the access link. In the above technical solution, the first node can notify the second node of changes in resource requirements through a resource allocation report, so that the second node can dynamically update scheduling configuration information, optimize system performance, and improve resource utilization.

In a possible implementation manner of the second aspect, before the second node receives the resource configuration report sent by the first node, the method further includes: sending a scheduling configuration request to the first node, where the scheduling configuration request is used for the second node request The first node sends a resource configuration report. In the above technical solution, the second node triggers the first node to perform a resource configuration report through the scheduling configuration request, so that the second node has a certain degree of flexibility to reconfigure the scheduling configuration information, optimize system performance, and improve resource utilization.

In a possible implementation manner of the second aspect, the scheduling configuration information is carried in physical downlink control signaling PDCCH, or media access control signaling MAC CE, or radio resource control RRC signaling, or F1AP interface protocol, or tunnel Agreement.

In a possible implementation manner of the second aspect, the scheduling configuration information is configured through RRC signaling, and the second node activates the configuration through physical downlink control signaling PDCCH or media access control signaling MAC CE. In the above technical solution, through the scheduling information reconfiguration message, the PDCCH of the first node access link, or the time slot or subframe of the signal can be reconfigured according to different environments or needs, which can quickly optimize the first node's The configuration of access link resources, and the utilization of backhaul link resources are improved, and the performance of the access and backhaul links of the relay system is improved.

In yet another aspect of the present application, a first node is provided, where the first node is configured to implement a function of a resource configuration method provided by any one of the possible implementation manners of the first aspect, and the function may be implemented by hardware. Implementation can also be implemented by hardware executing the corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the structure of the first node includes a processor, and the processor is configured to support the user equipment to execute the resources provided by the foregoing first aspect or any one of the possible implementation manners of the first aspect. Configuration method. Optionally, the relay device may further include a memory and a communication interface. The memory stores codes and data, the memory is coupled to the processor, and the communication interface is coupled to the processor or the memory.

In yet another aspect of the present application, a second node is provided, where the second node is configured to implement a function of the resource configuration method provided by the second aspect or any possible implementation manner of the second aspect, where The functions can be realized by hardware, and the corresponding software can also be implemented by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the structure of the second node includes a processor, and the processor is configured to support the network device to execute resources provided by the second aspect or any one of the possible implementation manners of the second aspect. The function of the configuration method. Optionally, the network device may further include a memory and a communication interface. The memory stores code required for processing and / or a baseband processor, the memory is coupled to the processor, and the communication interface is coupled to the memory or the processor.

In another aspect of the present application, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on a computer, the computer causes the computer to execute the first aspect or the first aspect. A method for allocating resources provided by any one of the possible implementation manners, or a method for allocating resources provided by performing the second aspect or any one of the two possible implementation manners of the second aspect.

In another aspect of the present application, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to execute the resources provided by the first aspect or any possible implementation manner of the first aspect. Or a resource allocation method provided by executing the second aspect or any one of the possible implementation manners of the second aspect.

According to yet another aspect of the present application, a communication system is provided. The communication system includes multiple devices, and the multiple devices include a first node and a second node. The first node is the first node provided in the foregoing aspects. A method for allocating resources provided by the first node to support the first aspect or any possible implementation manner of the first aspect; and / or, the second node is a second node provided by the foregoing aspects, and A method for allocating resources provided to support the second node to execute the second aspect or any one of the possible implementation manners of the second aspect.

In yet another aspect of the application, an apparatus is provided, where the apparatus is a processor, an integrated circuit, or a chip, and is configured to execute the steps performed by the processing unit of the first node in the embodiment of the present invention, for example, determining the first node The symbol bit occupied by sending the downlink signal on the access link of the LTE or the resource of the physical uplink signal that the first node is allowed to receive on the access link. The method for determining the sign bit occupied by sending a downlink signal on the access link of the first node, or the resource of the uplink signal that the first node is allowed to receive on the access link has been described in the other aspects or embodiments described above. , Will not repeat them here.

In another aspect of the application, another device is provided, where the device is a processor, an integrated circuit, or a chip, and is configured to execute the steps performed by the processing unit of the second node in the embodiment of the present invention. The method for determining the scheduling configuration information has been described in the foregoing other aspects or embodiments, and is not repeated here. In a possible implementation manner, the apparatus is further configured to process a message received from the first node or a message sent to the first node.

It can be understood that the device, computer storage medium, or computer program product of the resource allocation method provided above is used to execute the corresponding method provided above. Therefore, for the beneficial effects that can be achieved, refer to the corresponding method provided above. The beneficial effects in the method are not repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an IAB communication system according to an embodiment of the present application;

2 is a schematic diagram of LTE downlink backhaul resource allocation according to an embodiment of the present application;

FIG. 3 is a flowchart of resource configuration provided by an embodiment of the present application; FIG.

FIG. 4 is a schematic configuration diagram of downlink backhaul and access resources provided by an embodiment of the present application; FIG.

FIG. 5 is a schematic diagram of an IAB node that does not send a PDCCH in a backhaul link slot according to an embodiment of the present application; FIG.

FIG. 6 is a schematic diagram of a higher-level node configuring an IAB to be allowed to send a PDCCH according to an embodiment of the present application; FIG.

FIG. 7 is a schematic diagram when an IAB node supports space division multiplexing according to an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of performing uplink signal transmission in a time slot before a configured time slot according to an embodiment of the present application; FIG.

9 is a schematic diagram of a resource allocation report performed by a first node according to an embodiment of the present application;

10 is a schematic diagram of a second node requesting a resource configuration report according to an embodiment of the present application;

11 is a schematic diagram of a possible structure of a first node according to an embodiment of the present application;

12 is a schematic diagram of a possible logical structure of a first node according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a second node according to an embodiment of the present application; FIG.

FIG. 14 is a schematic diagram of a possible logical structure of a second node according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the Embodiments, all other embodiments obtained by those skilled in the art without creative labor, all belong to the protection scope of the present invention.

It should be understood that the names of all nodes and messages in this application are only the names set for the convenience of description in this application, and the names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages. Any name that has the same or similar function as the node or message used in this application is considered as a method or equivalent replacement of this application, and is within the scope of protection of this application, which will not be described in detail below.

Considering the high bandwidth of the future wireless network, NR considers introducing the IAB solution to further reduce deployment costs, improve deployment flexibility, and thus introduce integrated access and backhaul relays. This application will have integrated access and The backhauled relay nodes are called integrated access and backhaul nodes (IAB nodes) to distinguish LTE relays. The Third Generation Partnership Project (Third Generation, Partnership Project, 3GPP) has determined that NR IAB is the standardization target for Release 16. It is currently in the initial stage of research.

In order to better understand a method and device for resource allocation disclosed in the embodiments of the present invention, the network architecture used in the embodiments of the present invention is described below first. Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a communication system applicable to an embodiment of the present application.

It should be noted that the communication systems mentioned in the embodiments of the present application include, but are not limited to: a narrow-band Internet of Things (NB-IoT) system, a wireless local area network (WLAN) system, and an LTE system , Next-generation 5G mobile communication systems or communication systems after 5G, such as NR, device-to-device (D2D) communication, and car networking systems.

In the communication system shown in Figure 1, an integrated access and backhaul IAB system is given. An IAB system includes at least one base station 100, one or more terminal devices 101 served by the base station 100, one or more relay nodes IAB node, and one or more terminal devices served by the IAB node 110. 111. The base station 100 is generally called a donor base station (DnNB), and the IAB node 110 is connected to the base station 100 through a wireless backhaul link 113. The host base station is also referred to as a host node in this application, that is, a Donor node. Base stations include but are not limited to: evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home NodeB, or Home Node B, HNB), Baseband Unit (BBU), eLTE (evolved LTE, eLTE) base station, and NR base station (next generation (node, B, gNB) and so on. Terminal equipment includes, but is not limited to: user equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent, Wireless local area network (WLAN) stations (ST), cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, Personal digital processing (PDA), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in future 5G networks, and future evolutionary public Any one of terminal devices in a land mobile network (PLMN) network. IAB node is a specific name of a relay node, and does not limit the scheme of this application. It can be one of the above-mentioned base stations or terminal devices with a forwarding function, or it can be an independent device form. For example, an IAB node can be an on-board module in a connected vehicle, or a machine in machine-to-machine communication.

The integrated access and backhaul system can also include multiple other IAB nodes, such as IAB node 120 and IAB node 130. IAB node 120 is connected to IAB node 110 via a wireless backhaul link 123 to access the network. IAB node 130 is connected to IAB node 110 through a wireless backhaul link 133 to access the network. IAB node 120 serves one or more terminal devices 121, and IAB node 130 serves one or more terminal devices 131. In Figure 1, IAB node 110 and IAB node 120 are connected to the network through a wireless backhaul link. In this application, the wireless backhaul links are all viewed from the perspective of a relay node. For example, the wireless backhaul link 113 is an IAB node 110 backhaul link, and the wireless backhaul link 123 is an IAB node 120 Backhaul link. As shown in Figure 1, an IAB node, such as 120, can be connected to the network through a wireless backhaul link, such as 123, to another IAB node 110, and the relay node can be connected through a multi-level wireless relay node. To the network. It should be understood that the use of IAB nodes in this application is merely for the purpose of description, and does not mean that the solution of this application is only used in the NR scenario. In this application, IAB nodes can refer to any node or device with relay function. The use of IAB node and relay node in this application should be understood to have the same meaning.

For the convenience of description, the basic terms or concepts used in this application are defined below.

Upper-level node: A node that provides wireless backhaul link resources, such as 110, is called the upper-level node of IAB node 120,

Lower-level nodes: The nodes that use the backhaul link resources to transmit data to the network, or receive data from the network are called lower-level nodes. For example, 120 is called the relay node. Networks above the network, such as the Internet, private networks, etc.

Access link: The access link refers to the wireless link used by a node to communicate with its subordinate nodes, including uplink and downlink transmission links. The uplink transmission on the access link is also called the uplink transmission of the access link, and the downlink transmission is also called the downlink transmission of the access link. The nodes include, but are not limited to, the aforementioned IAB nodes.

Backhaul link: The backhaul link refers to the wireless link used by a node to communicate with its superior node, including uplink and downlink transmission links. The uplink transmission on the backhaul link is also referred to as the uplink transmission on the backhaul link, and the downlink transmission is also referred to as the downlink transmission on the backhaul link. The nodes include, but are not limited to, the aforementioned IAB nodes.

Waveform parameters: refers to a set of subcarriers, or physical subcarriers of a certain bandwidth or part of a carrier. The waveform parameters include at least one of the following parameters: subcarrier interval, cyclic prefix (CP) length, time Transmission time interval (TTI), symbol length, number of symbols, μ. Where μ is an integer greater than or equal to 0 and can take values from 0 to 5. Each μ corresponds to a specific subcarrier interval and CP. The relationship between the subcarrier interval and μ is Δf = 2 ^μ · 15 [kHz], where Δf is the subcarrier interval, Hz is the basic unit of frequency, and kHz is kilo Hz, which is kilohertz.

Time slot: It is the basic time domain unit in NR. A time slot can contain 14 or 12 symbols, depending on the CP length in the waveform parameters used in the time slot. It should be understood that, in some cases, the time slot and the subframe are the same. For example, when the subcarrier interval in the waveform parameter is 15 KHz, the time slot and the subframe may be the same. Similarly, time slots should not be limited to the above definitions. In some cases, mini-slots can also be defined, that is, one or more symbols can also be referred to as a time slot. The time slots in this application include mini-slots. concept. Symbols generally refer to orthogonal frequency division multiplexing (OFDM) symbols. However, they should not be construed as symbols limited to OFDM. They can also include symbols of other waveforms, such as single-carrier orthogonal frequency division multiplexed symbols. Wait. A subframe may be, for example, 1 ms, and a subframe may include one or more time slots. When a subframe contains only one slot, the subframe and slot are the same. The time slot or sub-frame in the following refers to a time slot or a sub-frame. In some cases, the sub-frame and the time-slot are the same, and in some cases the sub-frame and the time-slot are different. Refers to a basic unit of scheduling, where the time slot can be a mini-slot, which will not be described below.

Backhaul link time slot: refers to the time slot used for data transmission on the backhaul link. Data transmission includes uplink transmission and downlink transmission. Uplink transmission refers to the transmission of data from lower nodes to higher nodes. Downlink transmission refers to the superior. The node transmits data to lower nodes.

Beam: is a communication resource. The beam can be a wide beam, or a narrow beam, or another type of beam. The beam forming technology may be a beam forming technology or other technical means. The beamforming technology may be specifically a digital beamforming technology, an analog beamforming technology, and a hybrid digital / analog beamforming technology. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams. Optionally, multiple beams having the same or similar communication characteristics may be considered as one beam. A beam can be formed by one or more antenna ports, used to transmit data channels, control channels, and detection signals. For example, a transmission beam can refer to the distribution of signal strength in different directions of the space after the signal is transmitted by the antenna. The receiving beam may refer to an antenna array that strengthens or weakens the reception distribution of wireless signals in different directions in space. It can be understood that one or more antenna ports forming a beam can also be regarded as an antenna port set. In the current NR protocol, the beam can be reflected through the antenna port (quasi colocation (QCL) relationship). Specifically, the signals of two co-beams have a QCL relationship regarding the spatial Rx parameter , Which is QCL-Type D: {Spatial Rx parameter in the protocol}. The beam can be specifically expressed in the protocol by the identification of various signals, such as the CSI-RS resource ID, SS / PBCH time domain index, SRS (sounding reference signal, sounding signal) resource ID, TRS (tracking reference reference signal , Tracking signal) resource ID, etc. The above antenna port is a logical concept, and it does not have a one-to-one correspondence with a physical antenna. An antenna port is a logical unit formed by one or more physical antennas for a physical antenna that transmits a signal or signal stream.

In-band relay: It is a relay node that the backhaul link and the access link share the same frequency band.

Space division multiplexing: refers to the relay node transmitting to the lower node on the access link and transmitting to the upper node on the return link at the same time; or the relay node receiving the lower node on the access link at the same time And receive the transmission of the superior node on the backhaul link.

Generally, a lower-level node can be regarded as a terminal device of a higher-level node. It should be understood that in the integrated access and backhaul system shown in Figure 1, an IAB node is connected to an upper node, but in the future relay system, in order to improve the reliability of the wireless backhaul link, an IAB node, For example, 120, there can be multiple upper-level nodes providing services to an IAB node at the same time. As shown in the figure, IAB node 130 can also be connected to IAB node 120 via a backhaul link 134, that is, IAB node 110 and IAB node 120 are IABs. The superior node of node 130. The names of

IAB nodes

110, 120, and 130 are not limited to the scenarios or networks they are deployed in. They can be any other names such as relay, RN, and so on. The use of IAB nodes in this application is for the convenience of description only.

In Figure 1, the wireless links 102, 112, 122, 132, 113, 123, 133, 134 can be bidirectional links, including uplink and downlink transmission links. In particular, the

wireless backhaul links

113, 123, 133, 134 can be used by higher-level nodes to provide services to lower-level nodes, such as higher-level nodes 100 provides a wireless backhaul service for the lower node 110. It should be understood that the uplink and downlink of the backhaul link may be separated, that is, the uplink and downlink are not transmitted through the same node. The downlink transmission refers to an upper node, such as node 100, and the lower node, such as node 110, transmits information or data, and the uplink transmission refers to a lower node, such as node 110, to an upper node, such as node 100, to transmit information or data. The node is not limited to whether it is a network node or a terminal device. For example, in a D2D scenario, the terminal device can serve as a relay node to serve other terminal devices. The wireless backhaul link can be an access link in some scenarios. For example, the backhaul link 123 can also be regarded as an access link to the node 110, and the backhaul link 113 is also the access of the node 100. link. It should be understood that the above-mentioned higher-level node may be a base station or a relay node, and the lower-level node may be a relay node or a terminal device having a relay function. For example, in a D2D scenario, the lower-level node may also be a terminal device.

The relay nodes shown in Figure 1, such as 110, 120, and 130, can exist in two forms: one is as an independent access node and can independently manage the terminal equipment connected to the relay node. The relay node usually has an independent physical cell identifier (PCI). This type of relay usually requires a complete protocol stack function, such as the function of radio resource control (RRC). Relay is usually called layer 3 relay; and another form of relay node and Donor node, such as Donor eNB, Donor NB, belong to the same cell, and user management is managed by the host base station, such as Donor node. This kind of relay is usually called layer 2 relay. The layer 2 relay usually exists as the DU of the base station DgNB under the control and bearer separation (central-unit and distributed-unit (CU-DU) architecture of the NR, and communicates with the CU through the F1AP (F1 application protocol) interface or the tunneling protocol. The tunneling protocol may be, for example, the GTP (general packet, radio, service, tunneling, protocol) protocol, which is not repeated here. Donor node refers to a node that can access the core network through this node, or an anchor base station of a wireless access network, through which the base station can access the network. The anchor base station is responsible for receiving data from the core network and forwarding it to the relay node, or receiving data from the relay node and forwarding it to the core network.

At present, the NR relay system mainly considers in-band relay. Because no additional spectrum resources are used, in-band relay has the advantages of high spectrum efficiency and low deployment cost. In-band relays generally have a half-duplex constraint. Specifically, a relay node cannot send a downlink signal to its lower node when receiving a downlink signal sent by its upper node, and a relay node cannot send an uplink signal to its upper node when receiving an uplink signal sent by its lower node.

Due to the half-duplex constraint, the resource allocation of the backhaul link and access link of the relay node needs to be coordinated. In the LTE relay system, the resources of the access link and the backhaul link pass through the host node. Semi-statically allocated for relay nodes. Figure 2 shows a schematic diagram of LTE downlink backhaul resource allocation.

Figure 2 shows the symbol of a time slot or subframe on the backhaul link of the host base station, and the OFDM symbol of the relay node receiving the downlink signal of the host base station on the backhaul link and the access link of the relay node. Relationship. Among them, 210 is the symbol structure of a subframe of the host base station, 220 is the timing of the subframe symbols when the relay node receives the downlink signal of the host base station on the return link, and 222 indicates that the host base station sends a signal to the relay node to receive it. Signal propagation delay. 230 is a timing relationship that the relay node sends on the access link. It should be understood that the timeslot or sub-frame in this application is a name of the foregoing timeslot, and does not mean that the timeslot or sub-frame is limited to 14 symbols, and may also be a timeslot or mini-slot with more symbols. More details. Figure 2 mainly considers the allocation of backhaul resources when the downlink transmission time of the host base station and the relay node is synchronized. The downlink transmission time synchronization refers to the frame structure of the downlink transmission of the host base station and the frame of the downlink transmission of the relay node on the access link. The structures are aligned, for example, the starting positions of

frames

210 and 230 in FIG. 2 are the same. Figure 2 shows the resource usage of a time slot or sub-frame. Take a time slot or sub-frame containing 14 OFDM symbols as an example. The figure uses 0 to 13 as the label, such as 211 as a time slot or sub-frame. The 0th OFDM symbol of 200.

In LTE, the host base station allocates backhaul link resources to the relay node in units of subframes (1ms), that is, 200 in the figure is a subframe. The allocation period is one radio frame (10ms). A complete radio frame is not given in FIG. 2, and only one subframe is used as an example. Specifically, the host base station designates part of the subframes as the backhaul link subframes through RRC signaling, and the number and position of the backhaul link subframes can be configured.

Although the subframe shown in FIG. 2 is a backhaul subframe, the relay node still needs to perform PDCCH transmission of the access link in the first two symbols (symbols 0 and 1). After the relay node sends the PDCCH, the relay node switches to the receiving state to receive the physical downlink shared channel (PDSCH) of the return link. When switching, the relay node needs a certain time to turn off the power amplifier, that is, it needs a certain transmission and reception switching time. The transmission and reception switching time refers to the conversion time that the relay node receives from the transmission conversion. 232 in FIG. 2 is the time required for the relay node to change from transmitting to receiving. Because the switching time of the relay node occupies part of the time of symbol 2, except for

symbols

0 and 1, the relay node cannot receive the symbol 2 of the return link. Therefore, the relay node will return the link from symbol 3 receive. The relay node needs to switch to the PDCCH transmission of the access link again in the next subframe. Due to the existence of the propagation delay, the symbol 0 of the next subframe and the symbol 13 of the current subframe partially overlap. It takes a certain conversion time to switch the reception of the current sub-frame to the next sub-frame to send the PDCCH on symbol 0. Therefore, the relay node cannot perform data reception on symbol 13 of the return link. To sum up, in a backhaul subframe, the host base station can perform backhaul link transmission for the relay node only in symbols 3 to 12. It should be understood that it is assumed here that the number of PDCCH symbols is two. In practice, if the number of PDCCH symbols is another value, the downlink start symbols are different. For example, when the number of PDCCHs sent by the RN is 1, it will start to receive the link back from symbol 2. However, once the configuration is completed, the number of symbols used in each subframe is constant, and the configuration is completed through RRC signaling, and real-time configuration cannot be achieved.

Because the relay node cannot receive the

symbols

0 and 1 of the host base station, and the normal PDCCH starts from symbol 0, the relay node cannot receive the normal PDCCH. To solve the PDCCH reception problem, LTE defines a dedicated PDCCH for the relay node. The dedicated PDCCH does not start with the symbol 0 of each subframe.

The solution to the PDCCH scheduling symbol conflict between the LTE relay system and the access link is not flexible enough, mainly because: 1) On the access link, in order to enable the terminal device to always receive PHICH (physical hybrid ARQ (indicator channel) and cell-specific reference signal (CRS), the LTE relay node always sends several symbols in the header of the subframe. Therefore, in the scenario where the host base station and the relay node are synchronized, the head and tail of the downlink backhaul resource of the backhaul link need to be punctured to avoid affecting the transmission of signals such as PHICH and / or PDCCH of the relay node. 2) In the uplink direction of the relay node's access link, the relay node can configure the subframe as a cell-level SRS subframe without configuring UE-level SRS transmission, which causes the UE to uplink in this subframe. The transmission does not send the last symbol, so that when the LTE relay node performs uplink reception of the access link, it can eliminate the last OFDM symbol without affecting the transmission performance of the terminal device of the relay node. The last symbol of the link enables the backhaul PUSCH of the next subframe to be sent from symbol 0, where the OFDM symbols include, but are not limited to, DFT-s-OFDM (Discrete Fourier Transform-Spread OFDM) symbols, which are not described in detail below.

In NR, resource allocation is more flexible, so uplink and downlink conflict resolution is more possible, and there are some constraints that LTE does not have:

1) Due to the cancellation of PHICH and CRS, the NR base station or IAB node does not need to perform access link transmission at the head of each downlink slot or subframe, so there is more in the header or tail of the downlink backhaul subframe or slot It should be understood that in NR, resource scheduling is based on time slots in the time domain, and multiple time slots can also be jointly scheduled. At the same time, NR also supports scheduling non-slots of multiple symbols ( non-slot-based) scheduling.

2) PUCCH and SRS in NR are configurable. The base station can use multiple signaling, such as RRC signaling, media access control signaling (MAC control element, MAC CE), and downlink control information (Downlink Control Information, DCI). ) Cooperate with each other to configure and activate PUCCH and SRS. Therefore, the last symbol of a subframe or slot in the uplink transmission of the NR relay node on the access link may be used for PUCCH or SRS transmission, and the superior node cannot know whether the IAB node is performing on this symbol. PUCCH and SRS reception. Therefore, whether the last symbol of the uplink access slot or subframe of the relay node of the NR can be used for receiving and transmitting conversion depends on the configuration of the PUCCH or SRS. When the IAB node needs to receive PUCCH and SRS, it needs to receive the last symbol or symbols. In particular, for PUCCH format 0 and format 2 in NR, the number of symbols they occupy is only 1 to 2. If the IAB node cannot receive the last symbol, it is difficult to demodulate the PUCCH or SRS; it should be understood that here only Taking PUCCH and SRS as examples, other uplink signals may also be included. The uplink signals received by the IAB node on the access link include, but are not limited to, PUCCH and SRS.

3) NR has more flexible time slot configuration, and NR's relay nodes are considering supporting space division multiplexing. Flexible time slot configuration and possible space division multiplexing will lead to more conflict scenarios.

For example, space division multiplexing may be used in the NR, and the upper node simultaneously schedules the IAB node to perform uplink transmission on the return link in the downlink time slot of the IAB node's access link. At this time, the IAB node can simultaneously transmit A physical uplink shared channel (PUSCH) is sent on the link, and a PDSCH is sent on the access link. However, the base station or IAB node generally uses different beams or different precoding to send PDSCH and PDCCH on the access link, causing the IAB node to fail to send the PDCCH on the access link and the PUSCH on the return link at the same time. . If the PUSCH is sent on the backhaul link and the PDCCH is sent on the access link at the same time, performance will decrease.

The following uses specific examples to illustrate. In one case, the IAB node sends PDCCH on the access link with precoding matrix 0, PDSCH on the access link with precoding matrix 1, and precoding matrix 2 PUSCH is sent on the backhaul link.

Precoding matrices

1 and 2 are designed to minimize interference, and terminal equipment and higher-level nodes can also eliminate the PUSCH of the return link and the PDSCH of the access link by estimating the demodulation reference signal (DMRS). Interference. However, because the

precoding matrices

0 and 1 are different, the interference between the PDCCH of the access link and the PUSCH of the backhaul link is different from the interference between the PDSCH of the access link and the PUSCH of the backhaul link. The interference between the two cannot be eliminated by the signal processing technology of the transmitter or the receiver, thereby reducing the reception performance of the PDCCH of the access link and the PUSCH of the return link.

In another case, the transmission of the PDCCH of the access link requires more antennas for precoding to achieve better diversity gain. At this time, the IAB node cannot send the PDCCH of the access link and the backhaul link at the same time. PUSCH.

Therefore, when a downlink slot of the access link of the IAB node is allowed to transmit the PDCCH, the PUSCH of the backhaul link and the PDCCH of the access link should also be avoided to conflict.

Therefore, in the NR, how to avoid resource conflicts between the symbols of each subframe or time slot of the access link and the return link of the relay node, and improve the utilization rate of resources is an urgent problem to be solved.

To solve the above problem, this embodiment adopts a method for configuring a scheduling resource, which includes: a first node receives scheduling configuration information of a second node, and the scheduling configuration information includes a signal or data that the second node performs on one or more time slots The position of the start symbol of transmission; the first node determines the second communication resource according to the scheduling configuration information, the second communication resource includes the resource to communicate with the third node, and the resource to communicate with the third node includes: one or more time slots The first node sends the symbol bit occupied by the downlink signal on the access link, or the resource of the first control point that is allowed to receive the uplink control signal on the access link; the first node on the second communication resource and the first Three nodes communicate.

The allowed uplink control signals include, but are not limited to, the first node is allowed to receive the physical uplink control signaling PUCCH on the access link, or the sounding reference signal SRS. The sign bit refers to the number of symbols used by the first node when sending a downlink signal on the access link, such as one or more symbols starting from symbol 0. The sign bit refers to the position of the symbol occupied by the downlink signal and / Or quantity. The foregoing first node is a relay node, and the second node is a superior node of the first node. The second node may be a host base station or another relay node, which is not limited in this application.

The above scheduling configuration information includes at least one of a slot number, an allowed transmission identifier, an allowed transmission identifier, a starting symbol position, a number of symbols, a transmission direction, a transmission period, a transmission duration indication, and an activated starting frame number; or The configuration information includes at least one of a bitmap, a number of symbols, a transmission direction, a repetition period, and an indication of a transmission duration.

The first node receives the scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.

The positions of the start symbols in at least two timeslots on the multiple timeslots are different. The multiple time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message.

Before the first node receives the scheduling configuration information of the second node, the method further includes: the first node sends a resource configuration report to the second node, and the resource configuration report includes at least one of the following information: the physical status of the access link of the first node The configuration time slot of the downlink control signaling PDCCH, the number of symbols occupied by the PDCCH, and the time slot when the first node receives the uplink signal of the access link.

Before the first node sends the configuration information of the access link of the first node to the second node, the method further includes: receiving a scheduling configuration request sent by the second node, the scheduling configuration request being used by the second node to request the first node to send a resource configuration report .

FIG. 3 is a flowchart of resource allocation according to an embodiment of the present application, including the following steps.

S301. The first node receives scheduling configuration information of a second node. The scheduling configuration information is used to indicate the position of the start symbol of the second node's signal or data transmission on one or more time slots.

The scheduling configuration information may include the configuration of one or more time slots, and the positions of the start symbols of the second node performing signal or data transmission in different time slots and the first node may be the same or different. It should be understood that although it is one or more time slots here, it may also be one or more sub-frames, or even the allocation of symbol granularity scheduling resources, which is not limited in this application. One or more time slots here are mainly the basic units of time domain resource allocation for scheduling, and other basic units of time domain resource allocation can also be used here.

In order to indicate the position of the start symbol of the second node's signal or data transmission on one or more time slots, the scheduling configuration information may include the signal of one or more time slots on the backhaul link of the first node or The position of the start symbol of data transmission may also be indicated by the number of time domain resource symbols reserved by one or more time slots of the access link of the second node to the first node. The reserved time domain resources The symbol after the symbol is the position of the start symbol that can be used on the return link.

The above-mentioned second node performs signal or data transmission in one or more timeslots, including the second node performing downlink transmission on the first node on the backhaul link, and may further include the second node receiving uplink transmission of the first node. Including PDCCH, PUCCH, SRS, demodulation reference signal (DMRS), channel state information reference signal (CSI-RS), etc., the data includes PDSCH and PUSCH data.

The above scheduling configuration information includes at least one of the following information: slot number, allowed transmission identification, allowed signal type, starting symbol position, number of symbols, transmission direction, transmission period, transmission duration indication, and active start frame number . The relationship between the time slot number and other parameters in the scheduling configuration information may be a time slot number corresponding to a group of other parameters, or a plurality of time slot numbers corresponding to a group of other parameters. The other parameters refer to the foregoing scheduling configuration information. Parameters other than the slot number. For example, time slot 0 corresponds to a set of other parameters. The other parameters may be the above-mentioned allowed transmission identifier, allowed signal type, starting symbol position, number of symbols, transmission direction, transmission period, transmission duration indication, and activation start frame number. At least one of them; for another example,

time slots

0 and 1 correspond to a set of other parameters. The physical meaning of each parameter is as follows:

Slot number, which indicates the number of the configured timeslot. It can be an integer, for example, an integer numbered starting from 0. For different waveform parameter configurations, the number of time slots contained in a radio frame is different. The definition of the waveform parameters is the same as described above and will not be repeated here.

The allowed transmission identifier can be one or more bits. The transmission permission identifier refers to allowing the first node to transmit a PDCCH or an uplink signal, such as PUCCH or SRS, in a configured time slot number. The configured timeslot number refers to the timeslot number configured by the scheduling configuration information. When multiple signals need to be indicated, multiple bits can be used, each bit corresponding to a signal. For example, 100 is used to indicate that the PDCCH is allowed to be transmitted, but PUCCH and SRS are not allowed to be transmitted. The first bit of 100 indicates the PDCCH, the second bit indicates the PUCCH, and the third bit indicates the SRS. It should be understood that this is only an example, and it should not be understood as a constraint on the representation form of the transmission identifier, or other representation methods. For example, the integer 0 indicates that transmission is not allowed, and the integer 1 indicates that transmission of PDCCH is allowed, but not allowed. Transmit PUCCH and SRS. The integer 2 indicates that PDCCH and PUCCH are allowed to be transmitted, but SRS and the like are not allowed. This application is not limited. It should be understood that if it is a PDCCH, it indicates that the 0th to Mth symbols of the configured time slot are allowed to transmit the PDCCH, where M is an integer greater than or equal to 0; if it is a PUCCH or SRS, it indicates the last of the configured time slot N symbols are allowed to transmit PUCCH or SRS, N is an integer greater than 0.

In a possible implementation, it may be that the first node is allowed to transmit the first M symbols in a specific downlink time slot on the access link, where M is an integer greater than 0, or the first node is allowed to access the access link After receiving M1 symbols in a specific uplink time slot, M1 is an integer greater than 0. That is, no specific signal is allowed to be transmitted, and only resources allowed to be transmitted or received are given, for example, time domain resources allowed to be transmitted or received.

The transmission permission identifier is not necessary and can be implicitly indicated. As long as no time slot number is configured, it indicates that it is not allowed. If the time slot number is configured with other parameters, it indicates that transmission of PDCCH and uplink signals, such as PUCCH, SRS One or more of them are specifically identified by a signal type. In a possible implementation, uplink signals, such as PUCCH and / or SRS, can also be determined by the number of time domain resource symbols reserved on the access link or the position of the start symbol on the return link. The PUCCH or SRS can be transmitted on the last symbol or symbols of the slot or subframe without having to specifically configure the PUCCH and SRS.

Allowed signal types: Identifies the types of signals that the first node is allowed to transmit on the configured slot number. The signal type can be PDCCH or uplink signals, such as one or more of PUCCH and SRS. The specific identification method is the same as that allowed. Transmission ID. You can configure only one of the allowed signal types and allowed transmission IDs.

The starting symbol position indicates the starting symbol position. If this field does not exist, it starts at the 0th symbol by default. The symbols of time slots or subframes in this application are numbered starting from 0, which is only an example, and can also start from 1. Depending on the custom and definition, this application is not limited and will not be repeated.

The number of symbols indicates the number of symbols that the first node is allowed to use, especially when the first node performs the access link PDCCH transmission on the configured slot number, and indicates the number of symbols occupied by the PDCCH. The symbol may be a symbol of OFDM, or a symbol of other waveforms, which is not limited in this application, and will not be described in detail below. The number of symbols can also indicate the position of the start symbol for signal or data transmission on the return link corresponding to the slot number. It should be understood that if the number of symbols allowed for the first node is used, the number of symbols may include the number of symbols occupied by the first node for transmitting and receiving conversion, and may also indicate the number of symbols that the first node can actually use. The number of symbols occupied by the transceiver conversion can be determined according to the protocol whether it is included in the number of symbols.

Transmission direction, which indicates whether the transmission on the backhaul link is an uplink transmission or a downlink transmission time slot or subframe. Uplink transmission refers to the transmission of signals or data by the relay node to the superior node, and downlink transmission refers to the transmission of signals or data by the superior node to the relay node.

Transmission period, which identifies the period of scheduling configuration information. The scheduling configuration information is a periodic configuration. For example, some or all subframes within one or more radio frame ranges may be configured, or configuration may be performed for backhaul link subframes within one period.

The transmission duration indicates how long the scheduling configuration information is valid. It can be the number of transmission cycles or a specified time length, which is not limited in this application. The transmission duration indication is not necessary. When there is no configuration, the scheduling configuration information is valid until reconfiguration or deactivation.

Activation start frame number, which is used to indicate the time when the scheduling configuration information takes effect. If the scheduling configuration information is configured through high-level signaling, such as RRC or media access control signaling (MAC, CE, MAC), because the processing of high-level signaling requires a certain time, it is necessary to configure the scheduling configuration information The frame number may further include the configuration of the subframe number.

In a possible implementation, the scheduling configuration information includes at least one of the following information: a bitmap, a number of symbols, a repetition period, and an indication of a transmission duration. The difference from the above scheduling configuration information is that the slot number can be configured by using a bitmap bitmap. For example, a radio frame can be used as a bitmap. The bit in the corresponding bitmap is set to 1 to allow the first node to The corresponding slot number is signaled. The repetition period indicates the number of times the scheduling configuration information is repeated. A bitmap indicates a period. The repetition period indicates how long the scheduling configuration information is valid. The other parameters are the same as above and will not be described again.

In a possible implementation, the first node receives a scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information. The second node reconfigures the scheduling configuration information of the first node to adapt to changes in traffic and / or different types of services on the access link of the first node at different times or in different scenarios. The scheduling information reconfiguration message contains scheduling configuration information, which is not described again. Depending on the implementation, incremental reconfiguration or full reconfiguration can be supported. Therefore, the scheduling information reconfiguration message can include a configuration indication.

By scheduling the information reconfiguration message, the transmission of the PDCCH on the access link of the first node can be flexibly changed according to actual needs, thereby improving the flexibility of the system and the efficiency of spectrum use.

It should be understood that after the second node sends the scheduling configuration information or the scheduling information reconfiguration message to the first node, it will schedule the first node on the backhaul link of the first node in the configured time slot according to the configured information, Avoid collision or interference with the transmission of the first node on the access link. If the scheduling configuration information or the scheduling information reconfiguration message configures a resource that the first node can perform PDCCH transmission on the access link, or a time slot that can receive uplink signals on the access link, the second node Scheduling that conflicts with the configured resources for the first node will be avoided.

In the scheduling configuration message, if the configuration of multiple time slots is included, the positions of the start symbols for signal or data transmission on multiple return time slots on the return link may be the same or different. In a possible implementation, the positions of the start symbols of at least two timeslots on multiple timeslots are different.

Configuring the positions of the start symbols for signal or data transmission in different time slots can make the access link and backhaul link of the IAB node better adapt and improve the resource utilization of the backhaul link.

It should be understood that the foregoing multiple timeslots may include multiple timeslots in one scheduling configuration information, and may also include multiple timeslots in a scheduling information reconfiguration message, that is, at least two times of the scheduling configuration information configured multiple times. The positions of the start symbols of the slots are different. For example, in the initial scheduling configuration information, all symbols of time slot or subframe 0 are used for uplink transmission. After reconfiguration of the scheduling configuration information, the 0-2nd symbols of time slot or subframe 0 are used for the first The node performs PDCCH transmission on the access link. From a time perspective, the timeslots or subframe 0 in the two configurations are different, and are considered to be two timeslots in this application. It may also be a position where two time slots in the same scheduling configuration information have different start symbols. For example, in the same scheduling configuration information,

time slots

2 and 5 perform signals or data on the return link. The positions of the transmission start symbols are different.

The above scheduling configuration information and scheduling information reconfiguration message can be configured through PDCCH, MAC, CE, or RRC signaling, or F1AP interface protocol, or tunneling protocol. That is, the second node configures the scheduling configuration information or scheduling information reconfiguration message to the first node through the PDCCH, or MAC CE, or RRC signaling, or F1AP interface protocol, or one of the tunneling protocols, that is, the scheduling configuration information and The scheduling information reconfiguration message is carried in the PDCCH, or MAC, CE, or RRC signaling, or F1AP interface protocol, or tunneling protocol.

If the scheduling configuration information and the scheduling information reconfiguration message are configured through RRC signaling, only the basic information of the scheduling configuration information and the scheduling information reconfiguration message can be configured in the RRC configuration signaling, and the second node passes the PDCCH or the MAC CE. Activate the configuration. The basic information refers to the content of the above-mentioned scheduling configuration information, but after the configuration is completed, additional signaling is required to activate the configuration, mainly because the RRC signaling cannot be processed in real time, in order to avoid the first node and the second node If there is a conflict, another signaling is needed to activate the resources in the scheduling configuration information and the scheduling information reconfiguration message. In a possible implementation, the RRC message may also indicate the time when the configuration takes effect, such as the frame number of a certain radio frame, or the subframe of a certain radio frame begins to take effect. It should be understood that if the RRC signaling carries a specific point in time when the configuration takes effect, no additional signaling is required to activate the configuration.

S302. The first node determines a second communication resource according to the scheduling configuration information.

The second communication resource includes a resource for communicating with the third node, and the resource for communicating with the third node includes: a sign bit occupied by the downlink signal of the first node on one or more time slots, or an uplink signal that the first node is allowed to receive. Time slot.

The third node is a lower node of the first node, and may be another relay node or a terminal device. The resources for communication with the third node mainly include:

1) The first node needs resources for sending PDCCH on the access link on the configured time slot. Generally, the PDCCH on the access link occupies the first few symbols of a time slot, generally from symbol 0 to symbol M, where M is an integer greater than or equal to 0. It can be one symbol, or two or three symbols, etc .;

2) The resource used by the first node to receive the PUCCH on the configured time slot. As mentioned earlier, the configuration of the PUCCH is more flexible in the NR. If the second node starts a time slot from the 0th symbol to the first When a node transmits uplink data or signals or allows the first node to schedule the PDCCH of the access link in this time slot, the last N symbols of the previous time slot of the time slot cannot be used by the first node for its access. The terminal device on the incoming link is configured with PUCCH, where N is an integer greater than 0. This is mainly because the first node needs a certain conversion time when changing from receiving to transmitting state. This conversion is completed on the last N symbols of the previous slot of the time slot. The size of N depends on the time required for the conversion. And waveform parameters. It is not limited in itself;

3) The first node receives the resources used by the sounding reference signal SRS on the configured time slot. The sounding reference signal is similar to PUCCH and will not be described again.

The above-mentioned resources for communicating with the third node are only an example, and should not be construed as being limited to the above signals. It may also include, for example, CSI-RS, DMRS, phase tracking reference signal (PTRS), and the like.

The following describes the method by which the first node determines the PDCCH transmitted on the first link and receives the uplink signals, such as the resources of PUCCH and SRS, on the first link.

FIG. 4 shows a configuration diagram of downlink backhaul and access resources. In the figure, 401 is a control resource in one subframe or time slot, 402 is an access resource of the first node, and 403 and 404 are backhaul link resources of the first node. In FIG. 4, it is assumed that the ten time slots are all downlink time slots, and

time slots

2, 5, and 7 are configured as return time slots. Whether the backhaul time slot is actually scheduled depends on operations such as DCI scheduling, DCI activation, or MAC activation of the PDCCH.

In FIG. 4, except for time slot 2, all time slots of the first node have PDCCH transmission on the access link, that is, 401. In the NR, the PDCCH is configured by a control resource set (CORESET) and a search space set (search space set) in RRC signaling. Among them, CORESET gives the number of persistent symbols in the time domain of the PDCCH, frequency domain resources, precoding granularity, spatial QCL information, DMRS sequence, etc., and the search space set is configured with the period and offset of the PDCCH detection by the terminal device, and Information such as the start symbol, the number of candidate PDCCHs at different aggregation levels, and so on.

After the first node performs RRC configuration on the PDCCH of the terminal device of the access link, the position where the first node sends the PDCCH is determined, and the position where the terminal device detects the PDCCH is also determined. Therefore, when the access link of the first node is not configured with a PDCCH in a certain backhaul link slot or subframe, all symbols of the first node's backhaul link slot can be configured for backhaul. Transmission of link data or signals. For example, since slot 2 in FIG. 4 is not configured to send PDCCH on the access link, all symbols can be used for transmission of the backhaul link, that is, the entire time slot 2 is used for transmission of the backhaul link. . It should be understood that the first node is configured to send the PDCCH on the access link, but whether to send the PDCCH depends on whether any terminal device is scheduled. Therefore, not all slots that can send the PDCCH will necessarily send the PDCCH. I will not repeat them below.

All symbols of the backhaul link time slot are used for the transmission of backhaul link data or signals with the following advantages: 1) The IAB node can receive the PDCCH sent by the superior node at the head of the time slot, that is, the terminal of the IAB node and its superior node Devices share PDCCH resources; 2) a PDSCH in a backhaul slot can occupy more resources, making the transmission of the backhaul link more efficient. However, if all the backhaul link time slots or subframes of the IAB node are configured for the transmission of backhaul link data or signals, it may reduce the opportunity for the IAB node to send the PDCCH, which in turn will cause the IAB node Reduced scheduling flexibility. Therefore, the superior node of the IAB node and / or the IAB node should determine whether a certain return link time slot or subframe uses all symbols for the transmission of the return link according to the actual situation.

FIG. 5 is an example in which the IAB node does not send a PDCCH in a backhaul link slot. In Figure 5, 0-4 indicates the symbol of the return link time slot, and 501 indicates the 0th symbol sent by the host base station to the IAB node. After a certain transmission delay of 513, the IAB node receives the number on the return link. A symbol 511. When the IAB node receives data on the backhaul link, it does not send data on the access link. Therefore, the symbols 0-4 on the access link of the IAB node will not be transmitted. A dashed box 521 indicates that no data will be transmitted on the access link. It should be understood that FIG. 5 does not give all the symbols of a complete time slot or subframe, and only uses some symbols in one time slot or subframe as an example. In the figure, 502, 512, and 522 represent the last symbol of the previous time slot, and 523 represents the conversion time when the IAB node changed from transmitting to receiving in the previous time slot.

In Figure 5, the IAB node is configured to not send PDCCH on the access link. At this time, the IAB node starts downlink transmission from the upper node on the return link from symbol 0. The downstream transmission includes the upper node to the IAB node. The transmitted PDCCH and / or PDSCH. Because the IAB node's send-to-receive guard interval is likely to be greater than the transmission delay, so the IAB node does not send a PDCCH on the access link. If the previous slot is the downlink transmission slot of the access link, the previous The last symbol of the time slot cannot be used by the IAB node for downlink transmission on the access link.

Therefore, when the second node configures that a certain time slot of the first node is not allowed to transmit PDCCH on the access link, the first node should determine whether the last symbol of the previous time slot of the time slot can be configured with an uplink signal, such as PUCCH Or SRS. If the previous time slot is a receive time slot on the access link, the last symbol or symbols of the previous time slot can be configured with an uplink signal. If the previous time slot is a downlink transmission time slot on the access link, the last symbol or symbols of the previous time slot should not be configured as an uplink signal, such as the transmission of a CSI-RS.

It should be understood that the above FIG. 5 only uses the host base station to send downlink data or signals to the IAB node as an example. In a certain time slot, all symbols of the time slot may be used by the IAB node for uplink transmission on the backhaul link. At this time, if the previous time slot is an uplink transmission time slot on the access link, since the power amplifier needs to change from the receiving state to the transmitting state, and the timing advance of the first node on the return link must be considered, therefore, The last symbol or symbols of the previous slot cannot be used for uplink signals, such as the configuration of PUCCH or SRS. The last one or more symbols in this application refer to N symbols starting from the last symbol of a time slot or subframe, where N is an integer greater than 0 and will not be described again. If the previous time slot is downlink transmission, due to the design of the frame structure, a guard interval is reserved between the downlink transmission and the uplink transmission, so it is not affected.

FIG. 6 is a schematic diagram of a higher-level node configuring an IAB node to be allowed to send a PDCCH on an access link in a certain time slot. Only some symbols in one slot or subframe are shown in FIG. 6 for exemplary description. Among them, 601-604 indicate the timing of the symbols sent by the superior node to the IAB node, 611-614 are the timing of the IAB node receiving the symbols on the time slot or subframe on the return link, and 621-624 are the IAB nodes on the access link The symbol timing of the transmission slot is 615, which is the transmission delay between the upper node and the IAB node, and 625 is the guard interval when the IAB node changes from sending to receiving on the access link. Because in this time slot, the IAB node needs to send PDCCH on the access link, therefore, when sending data or signals to the IAB node, the upper node cannot start from the 0th symbol 601, but should start from the third symbol 604 At the beginning, that is, the first 3 symbols of the time slot or subframe cannot be used by the superior node to send data to the IAB node on the back link of the IAB node. Because the IAB node needs to perform downlink reception on the return link after sending the PDCCH on the access link, the IAB node needs a transition time from transmission to reception. For example, 625 in Figure 6 belongs to the guard interval and is used for transmission. Conversion to receive. Therefore, there are two symbols that the IAB node can use for the PDCCH on the access link, namely 621 and 622. In Figure 6, the IAB node cannot receive on the return link at symbols 611-613, and from 614, it receives the downstream transmission from the upper node. The IAB node cannot send data at the beginning of symbol 623 of the access link.

Therefore, if the second node configures the first node to transmit the PDCCH on the access link in a certain time slot, if the number of symbols in the scheduling configuration information indicates that the first node can be used for PDCCH transmission on the access link Number of symbols, whether the number of symbols includes the conversion time from sending to receiving, that is, 625, depends on the protocol definition or configuration. If it is configured through signaling, the first node also needs to support the reporting function, because different first The time from sending to receiving supported by a node may be different, resulting in different numbers of symbols required by different first nodes for the conversion from sending to receiving. If the conversion time from transmission to reception is included, the actual number of symbols used by the first node on the access link needs to be deducted from the number of symbols occupied by the conversion time from transmission to reception. If the number of symbols does not include the conversion time from transmission to reception, the first node needs to consider the conversion time from transmission to reception when determining the symbol position of the downlink data or signal received by the superior node, that is, it needs to add to the number of symbols The symbol data occupied by the conversion time from transmission to reception. The conversion time from transmission to reception depends on the waveform parameters and will not be repeated here.

Figure 7 is a schematic diagram when the IAB node supports space division multiplexing. In Figure 7, the IAB node sends the PDCCH on the access link. At this time, because the IAB node can only perform uplink transmission on the return link, in order to avoid the PUSCH transmission of the IAB node on the return link from the access link PDCCH interference, when transmitting PUSCH on the backhaul link, the symbols of the PDCCH previously used to transmit the access link cannot be used to transmit PUSCH, that is, 701 and 702 in FIG. 7 should not be used for the backhaul link. The transmission of the uplink PUSCH is because 711 and 712 on the access link are transmitting. It should be understood that the transmission of 711 and 712 may be a PDCCH transmission or a data transmission.

In the scenario shown in FIG. 7, the first node may determine the number of symbols that the PDCCH can use by scheduling the number of symbols in the configuration information. The difference is that if the first node performs uplink transmission on the backhaul link in this time slot, the first node does not need a transition time from sending to receiving, because the first node is on the access link and the backhaul link All transmissions are on the road, and no state transition is required. However, the uplink transmission may have a certain timing advance, which may affect the number of PDCCH symbols. It depends on the implementation, which depends mainly on the backhaul link. Whether uplink transmission will interfere with the PDCCH of the access link in advance. If the first node is configured for downlink reception on the backhaul link in this time slot, then the number of symbols occupied by the conversion time from transmission to reception also needs to be considered. The method is the same as that in FIG. 6 and will not be described again.

The above-mentioned FIG. 5, FIG. 6, and FIG. 7 mainly determine resources for sending a PDCCH in a downlink direction in a certain slot. The resources of the PDCCH mainly include time-domain resources, that is, the number of symbols used by the PDCCH. At the same time, the resource of the PUCCH in the previous slot of the configured slot may also be determined according to the resource usage of the PDCCH. In the embodiment of FIG. 5, the second node mainly configures the first node to transmit data at a certain time slot or subframe on the backhaul link starting from symbol 0, and FIG. 6 and FIG. The subframe supports a method for determining a PDCCH resource and an uplink signal of a previous time slot, such as a resource of a PUCCH or an SRS when the first node performs PDCCH transmission on an access link. If the second node configures the first node to transmit PDCCH in a time slot or subframe on the backhaul link, then, at this time, does the first node configure an uplink signal in the previous time slot, such as PUCCH or SRS Can be determined by the first node. If the previous time slot is an uplink time slot of the access link, the first node may configure an uplink signal on the last symbol or symbols for the UE on the access link. FIG. 8 shows a schematic diagram of uplink signal transmission in a time slot before a configured time slot.

In FIG. 8, the upper node starts to receive the uplink data or signal sent by the IAB on the return link from the symbol 2, that is, 803, that is, on the return link, the

symbols

0 and 1 of the upper node, that is, 801 and 802 Not used to receive uplink data or signals from IAB nodes. Similarly, the

symbols

0 and 1 of the IAB node, that is, 811 and 812, do not perform uplink transmission on the return link of the IAB node, and the uplink transmission starts with the symbol 2, that is, 813, for uplink transmission. At this time, the access link of the IAB node can perform PDCCH transmission. Although the power amplifier does not need to perform transmission and reception conversion at this time, because the uplink transmission of the access link requires a certain timing advance, some symbols will be caused. Cannot be used, for example, symbol 1 cannot be used, and only PDCCH transmission can be performed with symbol 0. If the previous slot of the IAB node on the access link is an uplink transmission slot, the last symbol or symbols, such as the last symbol 823, can be configured with an uplink signal, such as PUCCH or SRS, as shown in 824 in Figure 8. .

It should be understood that after determining the second communication resource, the first node may send a scheduling configuration response to the second node. Although this message is not shown in Figure 3, it can be sent. In a possible implementation, the first node may include the resource configuration information of the access link in the scheduling configuration response. The resource configuration information may include the PDCCH configuration time slot, the number of symbols occupied by the PDCCH, and the configuration of the uplink signal. At least one of time slots. The uplink signal, such as the configuration time slot of PUCCH and SRS, indicates whether the first node transmits the uplink signal PUCCH or SRS on the last symbol or symbols of the configuration time slot on the access link.

Similarly, if the second node sends a scheduling information reconfiguration message to the first node, the first node may also send a scheduling information reconfiguration response to the second node. The specific message is the same as the scheduling configuration response, and will not be described again.

The above embodiment illustrates how the first node determines the second communication resource after receiving the scheduling configuration information sent by the second node, that is, the first node performs downlink signal transmission on the access link in one or more time slots. The occupied sign bit, or the method of the time slot where the first node is allowed to receive the uplink signal. The uplink signals include, but are not limited to, PUCCH and SRS. The time slot or subframe number and the number of symbols in the scheduling configuration information can be used to determine whether the first node can perform PDCCH scheduling on the access link, or the time slot or time slot for uplink signal transmission in the last symbol or symbols. Sub-frames make the design of the system more flexible and the use of resources higher, instead of using fixed symbol reservations and dynamically using symbols.

S303. The first node communicates with the third node on the second communication resource. Through the above step S302, a symbol bit of a PDCCH in a time slot or subframe can be determined, or a time slot or subframe in which uplink signal transmission can be performed on the last one or more symbols. Through these determined resources, the first node can Communicate with the third node.

The third node is a subordinate node of the first node, and the third node includes a terminal device or another relay node. Communication with the third node includes the first node sending a PDCCH to the third node, or sending data to the third node. For example, in space division multiplexing, if a time slot of the first node is configured by the second node to not perform PDCCH transmission, and downlink reception is started from symbol 0, the first node may also configure the third node as Uplink transmission starts from symbol 0.

Communication with the third node also includes that the first node receives an uplink signal of the third node, such as PUCCH or SRS, on the last symbol or symbols of a certain time slot. It should be understood that the time slot or subframe for receiving an uplink signal does not mean that all symbols in the time slot are transmitted in uplink. NR is defined in mini-slot, which can be used to receive uplink feedback in time in the current time slot or sub-frame, or in the scheduling unit. The scheduling unit refers to the time domain unit of the scheduling configured by CORESET, which can be one or more time slots. As mentioned above, if the scheduling configuration information sent by the second node to the first node reserves the first few symbols of a time slot or subframe for the access link of the first node, such as symbols 0 to M, M is an integer greater than or equal to 0, then the first node may have a certain degree of freedom to select whether to perform PDCCH transmission on the access link or on the last symbol or symbols of the previous slot of the slot. Transmission such as PUCCH or SRS is performed. If the second node does not reserve the symbols of the access link for the first node, but uses all the symbols of a certain time slot for uplink or downlink transmission of the return link, then the Whether the last one or more symbols can be used to receive the uplink signal of the access link, such as PUCCH or SRS, depends on whether the configured time slot is used for uplink transmission or downlink transmission. If the first node is configured to perform downlink reception on all symbols on the backhaul link in this time slot, uplink signals, such as PUCCH or SRS transmission, may be performed on the last symbol or symbols of the previous time slot.

The foregoing embodiment uses the scheduling configuration information sent by the second node for the first node, and the first node determines a resource for sending a PDCCH on the access link, or can receive an uplink signal such as PUCCH or SRS on the last symbol or symbols. Time slot, making the resource utilization of each time slot more fully, and the configuration is more flexible, improving the spectrum utilization of the IAB system backhaul link.

FIG. 9 is a schematic diagram of a resource allocation report performed by a first node according to an embodiment of the present application. In FIG. 9, the first node sends a resource configuration report to the second node, and the resource configuration report includes at least one of the following information: a physical downlink control signaling PDCCH configuration slot of the access link of the first node, and a PDCCH occupation The number of symbols, the timeslot of the first node receiving the uplink signal of the access link. The first node actively reports the resource configuration of the access link of the first node, so that the second node obtains the resource configuration of the first node, and can configure the scheduling configuration information according to the scheduling needs of the first node. Include the following steps.

S901. The first node sends a resource configuration report to the second node. Because the first node may have different scheduling requirements at different times, the first node may send a resource configuration report to the second node to indicate the expected resource allocation of the first node. Especially in the case of some emergency services, such as V2X (Vehicle-to-everything), due to the high requirements for feedback, PUCCH may have to be configured on the last symbol or symbols of some time slots or subframes. In this case, the information needs to be reported to the second node. After receiving the resource configuration report of the first node, the second node will determine the resource allocation scheme according to the resource configuration report of the first node.

Specifically, the resource configuration report may be sent to the second node through RRC signaling, or MAC, CE, or F1AP, or a tunneling protocol. The content of the resource allocation report may include at least two types: one is an indication of downlink scheduling resources, and the other is an indication of uplink resources. It should be understood that the indications of the two resources do not have to appear at the same time, and may include only one of them. A specific configuration method may be to indicate, through a bitmap, whether each slot in a radio frame requires a certain type of scheduling resource. For example, the bitmap is used to indicate the PDCCH scheduling resource indication of the access link of the first node. If a bit is set to 1, it indicates that the time slot corresponding to the bit needs to be transmitted on the access link by the PDCCH. It should be understood that this is only an example, and the opposite expression may also be adopted, which is not limited in this application. The indication of PUCCH or SRS is similar.

The content of the resource configuration report may also be indicated in other ways, for example, directly indicating the time slot number. The configuration method is similar to the scheduling configuration information, and will not be described again.

The resource configuration report may further include: a resource configuration period and a resource configuration duration. The resource configuration period refers to the repeated period of resource configuration, for example, each radio frame has the same configuration. The resource allocation duration refers to the effective duration of the resource allocation, which can be the number of effective cycles, such as the duration of 10 radio frames, or a specific time. It should be understood that this is only an example, and this application does not limit the specific configuration method.

It should be understood that the sending of the resource configuration report does not necessarily result in receiving the scheduling configuration information, and the second node may configure the scheduling resource of the access link of the first node according to needs.

S902 is the same as S301, S903 is the same as S302, and S904 is the same as S303.

According to the foregoing embodiment, the first node uses the resource configuration report to enable the second node to obtain the resource configuration information of the first node, and can configure more reasonable scheduling configuration information for the first node, so that the first node's backhaul link resources The use is more full and more efficient.

FIG. 10 is a schematic diagram of a second node requesting a resource configuration report according to an embodiment of the present application. In FIG. 10, in order to send scheduling configuration information to the first node, the second node may first send a scheduling configuration request to the first node, and let the second node send a resource configuration report to the second node. Proceed as follows.

S1001. The second node sends a scheduling configuration request to the first node. The scheduling configuration request is used by the second node to request a resource configuration report from the first node. The scheduling configuration request is carried in RRC signaling, or MAC, CE, or PDCCH, or F1AP, or a tunneling protocol. Specifically, a scheduling configuration request may be added to the message. After receiving the scheduling configuration request, the first node sends a resource configuration report to the second node.

S1002-S1005 are the same as S901-S904 in FIG. 9 and will not be described again.

In the above embodiment, the second node sends a scheduling configuration request to the first node, and triggers the first node to perform a resource configuration report, thereby optimizing the scheduling configuration information of the first node by the second node, thereby optimizing the resources on the first node's backhaul link. Allocation and scheduling. On the other hand, through the scheduling configuration request, the scheduling configuration information can be optimized or reconfigured in a more timely manner, so that the use of resources is more sufficient.

It should be understood that the scheduling configuration information in the embodiments of FIG. 3, FIG. 9, and FIG. 10 described above may be configured multiple times. For example, the scheduling configuration information of the second node may be reconfigured to optimize the return link of the first node. Use of resources.

In a possible implementation, the IAB node requests to increase the chance of sending PDCCH on the access link, or requests to increase the chance of receiving uplink signals, such as PUCCH, on the access link. In other words, request to increase the head protection of the downlink time slot, or increase the tail protection of the uplink time slot. At this time, the IAB node sends a signaling indication to the second node, and the specific signaling indication may be carried in the PDCCH, MAC, CE, or RRC signaling. After receiving the instruction, the second node reconfigures the scheduling configuration information. As described above, the scheduling configuration information may be an incremental configuration or a full reconfiguration, which is not described again.

The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to implement the above functions, each network element, such as an IAB node, a host base station, or an upper node of the IAB node, includes a hardware structure and / or a software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the network elements and algorithm steps of the examples described in the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

In the embodiment of the present application, the functional modules of the IAB node, the host base station, or the superior node of the IAB node can be divided according to the above method examples. For example, the functional modules can be divided into various functional modules, or two or more functions can be integrated into one Processing module. The above integrated modules may be implemented in the form of hardware or software functional modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.

FIG. 11 is a schematic diagram of a possible structure of a relay device involved in the foregoing embodiment provided by the present application. In this application, the first node is a relay device. The first node includes a communication unit 1101 and a processing unit 1102. The communication unit 1101 is configured to support the first node to perform S301 or S303 in FIG. 3, S901 or S902 or S904 in FIG. 9, S1001 or S1002 or S1003 or S1005 in FIG. 10, and to support the first node in the foregoing embodiment. A node sends a scheduling configuration response to the second node, or is used to support receiving a scheduling information reconfiguration message sent by the second node; a processing unit 1102 is configured to support the first node to perform S302 in FIG. 3, S903 in FIG. 9, S1004 in FIG. 10.

In terms of hardware implementation, the above-mentioned communication unit 1101 may be a receiver or a transmitter, and the receiver and the transmitter are integrated in the communication unit to form a communication interface.

FIG. 12 is a schematic diagram of a possible logical structure of a first node involved in the foregoing embodiment provided by an embodiment of the present application. The first node includes: a processor 1202. In the embodiment of the present application, the processor 1202 is configured to control and manage the action of the first node. For example, the processor 1202 is configured to support the first node to execute S302 in FIG. 3 and S903 in FIG. 9 in the foregoing embodiment. In the step of determining a second communication resource in step S1004 in FIG. 10, the processor 1202 is further configured to support the first node to perform processing on a message received or sent by the communication unit in the foregoing embodiment. Optionally, the first node may further include: a memory 1201 and a communication interface 1203; the processor 1202, the communication interface 1203, and the memory 1201 may be connected to each other or to each other through a bus 1204. The communication interface 1203 is configured to support the first node for communication, and the memory 1201 is configured to store program code and data of the first node. The processor 1202 calls the code stored in the memory 1201 for control and management. The memory 1201 may be coupled with the processor or not coupled.

The processor 1202 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processor may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The bus 1204 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 12, but it does not mean that there is only one bus or one type of bus.

FIG. 13 is a schematic diagram of a possible structure of a second node involved in the foregoing embodiment provided by this application. In this application, the second node is a host base station or other relay node. The second node includes: a sending unit 1301 and a processing unit 1302. The sending unit 1301 is configured to support the second node to perform S301 in FIG. 3, step S902 in FIG. 9, and step S1001 or S1003 in FIG. 10, and is used to support the second node to execute the scheduling information retransmission in the foregoing embodiment. A configuration message; a processing unit 1302 is configured to support the second node to execute S302 in FIG. 3, S903 in FIG. 9, and S1004 in FIG. 10, and the processing unit 1302 is further configured to support the second node to execute the receiving unit in the foregoing embodiment; The processing of a received message or a message sent by a sending unit. The second node may further include a receiving unit 1303 for supporting the second node to perform S901 in FIG. 9 and step S1002 in FIG. 10, and for supporting the second node to receive the schedule sent by the first node in the foregoing embodiment. Configuration response and scheduling information reconfiguration response.

FIG. 14 is a schematic diagram of a possible logical structure of a second node involved in the foregoing embodiment provided by an embodiment of the present application. The second node includes: a processor 1402. In the embodiment of the present application, the processor 1402 is configured to control and manage the action of the second node. For example, the processor 1402 is configured to support the second node to perform the determination that the first node is transmitting back in FIG. 3 in the foregoing embodiment. Scheduling configuration information on the link, the scheduling configuration information is used to indicate the position of the start symbol of the second node for signal or data transmission on one or more time slots; the processor 1402 is further configured to support the second node to implement the foregoing implementation Examples are the processing of receiving or sending a message in Figures 3, 9, and 10. Optionally, the second node may further include: a memory 1401 and a communication interface 1403; the processor 1402, the communication interface 1403, and the memory 1401 may be connected to each other or to each other through a bus 1404. The communication interface 1403 is used to support the second node for communication, and the memory 1401 is used to store the program code and data of the second node. The processor 1402 calls the code stored in the memory 1401 for control and management. The memory 1401 may be coupled with the processor or not coupled.

The processor 1402 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processor may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The bus 1404 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 14, but it does not mean that there is only one bus or one type of bus.

In another embodiment of the present application, a readable storage medium is also provided. The readable storage medium stores computer-executable instructions. When a device (which may be a single-chip microcomputer, a chip, or the like) or a processor executes the operations shown in FIG. 3-10 When the steps of the first node or the second node in the provided method for scheduling resources are read, the computer executes instructions in the storage medium. The foregoing readable storage medium may include: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

In another embodiment of the present application, a computer program product is also provided. The computer program product includes computer-executable instructions stored in a computer-readable storage medium; at least one processor of the device may be The storage medium reads the computer execution instruction, and at least one processor executes the computer execution instruction to cause the device to implement the steps of the first node and the second node in the method for configuring a scheduling resource provided in FIG. 3-10.

In another embodiment of the present application, a communication system is further provided. The communication system includes at least a first node and a second node. The first node may be the first node provided in FIG. 11 or FIG. 12, and is configured to execute the steps of the first node in the method for configuring scheduling resources provided in FIG. 3-10; and / or, the second node may be The second node provided in FIG. 13 or FIG. 14 is used to execute the steps performed by the second node in the method for configuring the scheduling resources provided in FIG. 3-10. It should be understood that the communication system may include multiple first nodes, and the second node may configure scheduling resources for multiple first nodes simultaneously.

In the embodiment of the present application, after the first node obtains the scheduling configuration information from the second node, the PDCCH resources that the first node can use on the access link or the resources on the access link can be determined according to the scheduling configuration information. Transmission of uplink signals, such as PUCCH or SRS time slots, which occupy the last symbol or symbols of the previous time slot of the configured time slot, which solves the fixed configuration of the backhaul link time slot or subframe pre-configuration in the IAB system The problem of resource waste caused by leaving the PDCCH of the IAB node on the access link but may not be used.

Finally, it should be noted that the above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any changes or replacements within the technical scope disclosed in this application shall be covered in this application. Within the scope of the application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for resource allocation, comprising:

Receiving, by a first node, scheduling configuration information of a second node, where the scheduling configuration information is used to indicate a position of a start symbol of a signal or data transmission performed by the second node on one or more time slots;

The first node determines a second communication resource according to the scheduling configuration information, the second communication resource includes a resource that communicates with a third node, and the resource that communicates with the third node includes: The symbol bit occupied by the first node on the access link to send the downlink signal, or the resource of the uplink signal that the first node is allowed to receive on the access link;

The first node communicates with a third node on the second communication resource.
The method according to claim 1, wherein the scheduling configuration information comprises: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, and an indication of a transmission duration At least one of the activated starting frame numbers.
The method according to claim 1 or 2, comprising:

The first node receives a scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The method according to any one of claims 1-3, wherein positions of the start symbols of at least two time slots on the plurality of time slots are different.
The method according to any one of claims 3-4, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message.
The method according to any one of claims 1-5, further comprising:

Sending, by the first node, a resource configuration report to the second node, the resource configuration report including at least one of the following information: when the physical downlink control signaling PDCCH of the access link of the first node is configured Slot, the number of symbols occupied by the PDCCH, and a time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The method according to claim 6, wherein before the first node sends the resource configuration report to the second node, further comprising:

Receiving a scheduling configuration request sent by the second node, where the scheduling configuration request is used by the second node to request the first node to send the resource configuration report.
The method according to any one of claims 1 to 7, wherein the scheduling configuration information is carried in a physical downlink control signaling (PDCCH), a media access control signaling (MAC) CE, or a radio resource control RRC signaling, Either F1AP interface protocol or tunneling protocol.
The method according to any one of claims 1 to 8, wherein the scheduling configuration information is configured through RRC signaling, and the second node uses a physical downlink control signaling (PDCCH) or a media access control signaling (MAC). CE activation configuration.
A method for resource allocation, which includes:

The second node determines scheduling configuration information of the first node on the backhaul link, and the scheduling configuration information is used to indicate a position of a start symbol for the second node to perform signal or data transmission on one or more time slots. ;

Sending, by the second node, the scheduling configuration information to the first node.
The method according to claim 10, wherein the scheduling configuration comprises: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, an indication of a transmission duration, At least one of the active start frame numbers.
The method according to claim 10 or 11, comprising:

The second node sends a scheduling information reconfiguration message to the first node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The method according to any one of claims 10-12, wherein positions of the start symbols of at least two time slots on the plurality of time slots are different.
The method according to any one of claims 10-13, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message.
The method according to any one of claims 10 to 14, further comprising:

Receiving, by the second node, a resource configuration report sent by the first node, the resource configuration report including at least one of the following information: a configuration of a physical downlink control signaling PDCCH of an access link of the first node A time slot, a number of symbols occupied by the PDCCH, and a time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The method according to claim 15, before the receiving, by the second node, the resource configuration report sent by the first node, further comprising:

Sending a scheduling configuration request to the first node, the scheduling configuration request being used by the second node to request the first node to send the resource configuration report.
The method according to any one of claims 10 to 16, wherein the scheduling configuration information is carried in a physical downlink control signaling (PDCCH), a media access control signaling (MAC) CE, or a radio resource control RRC signaling, Either F1AP interface protocol or tunneling protocol.
The method according to any one of claims 10 to 17, wherein the scheduling configuration information is configured through RRC signaling, and the second node uses physical downlink control signaling (PDCCH) or media access control signaling (MAC). CE activation configuration.
A first node, wherein the first node supports resource configuration, and is characterized by comprising:

A communication unit, configured to receive scheduling configuration information of a second node, where the scheduling configuration information is used to indicate a position of a start symbol of a signal or data transmission performed by the second node on one or more time slots;

A processing unit, configured to determine a second communication resource according to the scheduling configuration information, the second communication resource includes a resource that communicates with a third node, and the resource that communicates with the third node includes: A symbol bit occupied by the first node sending a downlink signal on an access link on the slot, or a resource of a physical uplink signal that the first node is allowed to receive on the access link;

The communication unit is further configured to communicate with a third node on the second communication resource.
The node according to claim 19, wherein the scheduling configuration information includes: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, and an indication of a transmission duration At least one of the activated starting frame numbers.
The node according to claim 19 or 20, comprising:

The receiving unit is further configured to receive a scheduling information reconfiguration message of the second node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The node according to any one of claims 10 to 21, wherein positions of the start symbols of at least two timeslots on the plurality of timeslots are different.
The node according to any one of claims 19 to 22, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message.
The node according to any one of claims 19-23, further comprising:

A sending unit, configured to send a resource configuration report to the second node, where the resource configuration report includes at least one of the following information: when the physical downlink control signaling PDCCH of the access link of the first node is configured Slot, the number of symbols occupied by the PDCCH, and a time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The node according to any one of claims 19-23, further comprising:

The receiving unit is further configured to receive a scheduling configuration request sent by the second node, where the scheduling configuration request is used by the second node to request the first node to send the resource configuration report.
The node according to any one of claims 19 to 23, wherein the scheduling configuration information is carried in physical downlink control signaling (PDCCH), media access control signaling (MAC) CE, or radio resource control RRC signaling, Either F1AP interface protocol or tunneling protocol.
The node according to any one of claims 19 to 23, wherein the scheduling configuration information is configured through RRC signaling, and the second node is configured through physical downlink control signaling (PDCCH) or media access control signaling (MAC). CE activation configuration.
A second node, where the second node is used for resource configuration, includes:

A processing unit, configured to determine scheduling configuration information of the first node on the backhaul link, and the scheduling configuration information is used to instruct the second node to start a signal or data transmission symbol on one or more time slots s position;

A sending unit, configured to send the scheduling configuration information to the first node.
The second node according to claim 28, wherein the scheduling configuration comprises: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, and an indication of a transmission duration At least one of the activated starting frame numbers.
The second node according to claim 28 or 29, comprising:

The sending unit is configured to send a scheduling information reconfiguration message to the first node, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The second node according to any one of claims 28 to 30, wherein positions of the start symbols of at least two time slots on the plurality of time slots are different.
The second node according to any one of claims 28 to 31, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message. .
The second node according to any one of claims 28-32, further comprising:

The receiving unit is further configured to receive a resource configuration report sent by the first node, where the resource configuration report includes at least one of the following information: physical downlink control signaling of an access link of the first node The configuration time slot of the PDCCH, the number of symbols occupied by the PDCCH, and the time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The second node according to claim 33, further comprising:

The sending unit is further configured to send a scheduling configuration request to the first node before receiving the resource configuration report sent by the first node, where the scheduling configuration request is used by the second node to request the The first node sends the resource configuration report.
The second node according to any one of claims 28 to 34, wherein the scheduling configuration information is carried in a physical downlink control signaling (PDCCH), or a media access control signaling (MAC), or a radio resource control (RRC) signal. Command, or F1AP interface protocol, or tunneling protocol.
The second node according to any one of claims 28 to 34, wherein the scheduling configuration information is configured through RRC signaling, and the second node is configured through physical downlink control signaling (PDCCH) or media access control information. Let MAC CE activate the configuration.
A first device, wherein the first device supports resource configuration, and includes:

A transceiver, configured to receive scheduling configuration information of a second device, where the scheduling configuration information is used to indicate a position of a start symbol of a signal or data transmission performed by the second device on one or more time slots;

A processor, configured to determine a second communication resource according to the scheduling configuration information, the second communication resource includes a resource that communicates with a third device, and the resource that communicates with the third device includes: A symbol bit occupied by the first device sending a downlink signal on the access link on the slot, or a resource of a physical uplink signal that the first device is allowed to receive on the access link;

The transceiver is further configured to communicate with a third device on the second communication resource.
The device according to claim 37, wherein the scheduling configuration information comprises: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, and an indication of a transmission duration At least one of the activated starting frame numbers.
The device according to claim 37 or 38, comprising:

The transceiver is further configured to receive a scheduling information reconfiguration message of the second device, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The device according to any one of claims 37 to 39, wherein positions of the start symbols of at least two time slots on the multiple time slots are different.
The device according to any one of claims 37 to 40, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message.
The device according to any one of claims 37-41, further comprising:

A transceiver, configured to send a resource configuration report to the second device, where the resource configuration report includes at least one of the following information: when the physical downlink control signaling PDCCH of the access link of the first device is configured Slot, the number of symbols occupied by the PDCCH, and a time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The device according to any one of claims 37-41, further comprising:

The transceiver is further configured to receive a scheduling configuration request sent by the second device, where the scheduling configuration request is used by the second device to request the first device to send the resource configuration report.
The device according to any one of claims 37 to 41, wherein the scheduling configuration information is carried in a physical downlink control signaling (PDCCH), a media access control signaling (MAC) CE, or a radio resource control RRC signaling, Either F1AP interface protocol or tunneling protocol.
The device according to any one of claims 37-41, wherein the scheduling configuration information is configured through RRC signaling, and the second 37-41 is configured through physical downlink control signaling (PDCCH) or media access control information. Let MAC CE activate the configuration.
A second device, where the second device is used for resource configuration, includes:

A processor, configured to determine scheduling configuration information of a first device on a backhaul link, where the scheduling configuration information is used to instruct a start symbol of the second device to perform signal or data transmission on one or more time slots s position;

A transceiver, configured to send the scheduling configuration information to the first device.
The second device according to claim 46, wherein the scheduling configuration comprises: a slot number, an allowed transmission identifier, an allowed signal type, a starting symbol position, a number of symbols, a transmission direction, a transmission period, and an indication of a transmission duration At least one of the activated starting frame numbers.
The second device according to claim 46 or 47, comprising:

The transceiver is configured to send a scheduling information reconfiguration message to the first device, and the scheduling information reconfiguration message is used to reconfigure the scheduling configuration information.
The second device according to any one of claims 46 to 48, wherein positions of the start symbols of at least two time slots on the plurality of time slots are different.
The second device according to any one of claims 46 to 49, wherein the plurality of time slots include a time slot configured by the scheduling configuration information and a time slot configured by the scheduling information reconfiguration message. .
The second device according to any one of claims 46-50, further comprising:

The transceiver is further configured to receive a resource configuration report sent by the first device, where the resource configuration report includes at least one of the following information: a physical downlink control signaling of an access link of the first device The configuration time slot of the PDCCH, the number of symbols occupied by the PDCCH, and the time slot in which the first node receives an uplink signal of an access link, where the uplink signal includes a PUCCH and an SRS.
The second device according to claim 51, further comprising:

Before receiving the resource configuration report sent by the first device, the transceiver is further configured to send a scheduling configuration request to the first device, where the scheduling configuration request is used by the second device to request the The first device sends the resource configuration report.
The second device according to any one of claims 46-52, wherein the scheduling configuration information is carried on a physical downlink control signaling (PDCCH), or a media access control signaling (MAC) CE, or a radio resource control RRC information. Command, or F1AP interface protocol, or tunneling protocol.
The second device according to any one of claims 46-53, wherein the scheduling configuration information is configured through RRC signaling, and the second device is configured through physical downlink control signaling (PDCCH) or media access control information. Let MAC CE activate the configuration.
A first device, comprising:

Hardware related to program instructions, the hardware is used to perform the method steps according to any one of claims 1-9, or is used to perform the method steps according to any one of claims 10-18.
A readable storage medium, characterized in that a program is stored on the readable storage medium, and when the program is run, the method for configuring a scheduling resource according to any one of claims 1-9 is implemented, or The method for configuring scheduling resources according to any one of claims 10 to 18.
A communication system, the communication system includes a first node and a second node, the first node implements a method for configuring a scheduling resource according to any one of claims 1-9, and the second node implements a right A method for allocating a scheduling resource according to any one of 10-18 is required.