Systems and methods for resource information indication

Abstract

Presented are systems and methods for resource information indication. A network node may receive, from a wireless communication node, resource information used for at least one of a first forwarding link, a second forwarding link, a third forwarding link, or a fourth forwarding link. The first forwarding link may be from the wireless communication node to the network node. The second forwarding link may be from the network node to the wireless communication node. The third forwarding link may be from the network node to a wireless communication device. The fourth forwarding link may be from the wireless communication device to the network node.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to wireless communications, including, but not limited to, systems and methods for resource information indication. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP®), a standards organization, is currently working on the specification of a new air interface called 5G New Radio (5G NR) and the Next Generation Packet Core Network (NG-CN or NGC). 5G NR will have three major components: a 5G Access Network (5G-AN), a 5G Core Network (5GC), and a User Equipment (UE). To facilitate the enablement of different data services and requirements, elements of the 5GC, also called network functions, are being simplified, with some of them being software-based and some being hardware-based so that they can be adapted according to need. Summary of the Invention [Means for solving the problem]

[0003] The exemplary embodiments disclosed herein are directed to solving one or more problems associated with the prior art and providing additional features that will become readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. It should be understood, however, that these embodiments are presented by way of example, and not limitation, and that various modifications to the disclosed embodiments may be made while remaining within the scope of the present disclosure, as will be apparent to those skilled in the art upon perusal of this disclosure.

[0004] At least one aspect is directed to the following system, method, apparatus, or computer-readable medium. A network node may receive, from a wireless communication node, resource information used for at least one of a first forwarding link, a second forwarding link, a third forwarding link, or a fourth forwarding link. The first forwarding link may be from the wireless communication node to the network node. The second forwarding link may be from the network node to the wireless communication node. The third forwarding link may be from the network node to the wireless communication device. The fourth forwarding link may be from the wireless communication device to the network node. The resource information may include at least one of beam information or additional information for the access link. The additional information may comprise at least one of frequency information for the access link, panel information for the access link, link level on / off information, beam information for the backhaul link, frequency information for the backhaul link, panel information for the backhaul link, or uplink (UL) / downlink (DL) information. The backhaul link may include the first forwarding link and the second forwarding link. The access link may include a third forwarding link and a fourth forwarding link.

[0005] In some embodiments, prior to the network node receiving the resource information, the wireless communication node may have received capability information of the network node. The capability information may be transmitted to the wireless communication node from an operations, administration, and maintenance (OAM) entity. The capability information may be reported from the network node to the wireless communication node. The capability information may include at least one of frequency information allocation for the access link and / or the backhaul link, simultaneous beam operation capability for the access link and / or the backhaul link, frequency shift capability, or sub-band non-overlapping full duplex (SBFD) capability.

[0006] In some embodiments, the frequency information may include at least one of the following formats: carrier index, passband index, bandwidth portion (BWP) index, subband index, cell identifier (ID), starting physical resource block (PRB), starting resource element (RE), ending PRB, ending RE, number of consecutive PRBs, number of REs, RB offset, RE offset, absolute radio frequency channel number (ARFCN), or global synchronization raster channel number (GCSN). The panel information may include at least one of the following formats: panel identification or index, or antenna group ID or index. The link level on / off information may be used to indicate an on / off status applicable for at least one of the first forward link, the second forward link, the third forward link, or the fourth forward link. The beam information for the backhaul link may be in one of the following formats: beam index or transmission configuration indication (TCI) status.

[0007] In some embodiments, when beam information for a backhaul link is in the format of a TCI state, a list including one or more TCI states can be configured for the network node to be used for backhaul link beam information indication. The list can be configured for the network node by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. A set of logical reference signals used in the TCI states can be defined for the network node. The set of logical reference signals can be a one-to-one mapping to physical backhaul link beams. A new type of TCI state may include a logical beam index defined for the network node, and the logical beam index can be a one-to-one mapping to physical backhaul link beams. At least one of the additional information can be indicated in the same radio resource control (RRC) signaling used for periodic beam information indication of the access link. The format of the indication for each type of additional information is one of the following: the additional information is indicated in a pair with the beam index for the access link configured in the list by RRC signaling, and each access link beam has corresponding additional information associated with it; and one field is added to indicate the additional information, which is applicable for all access link beams configured in the list by RRC signaling.

[0008] In some embodiments, at least one of the additional information can be indicated in the same RRC signaling used for the semi-persistent beam information indication of the access link. The format of the indication for each type of additional information can be one of: the additional information is indicated in a pair with the beam index for the access link configured in the list by radio resource control (RRC) signaling, or one field is added to indicate the additional information and is applicable for all beam indexes for the access link configured in the list by RRC signaling. At least one of the additional information can be indicated in the same medium access control control element (MAC CE) signaling used for the semi-persistent beam indication of the access link. The format of the indication for each type of additional information may be one of: one or more fields are added in the MAC CE signaling to indicate the one or more additional information, and the one or more additional information is a one-to-one mapping to the indicated beam index information of the access link activated in the MAC CE signaling; or one field is added to indicate the additional information, and is applicable for all beam index information of the access link activated in the MAC CE signaling.

[0009] In some embodiments, at least one of the additional information can be indicated in the same radio resource control (RRC) signaling and medium access control (MAC CE) signaling used for semi-persistent beam indication of the access link. The indication format for each type of additional information may include one field added in the RRC signaling to indicate the additional information and applicable for all beam indices for the access link configured in the list by the RRC signaling, and one or more fields added in the MAC CE signaling to update the one or more additional information used for the particular indicated access link beam information. At least one of the additional information can be indicated in the same downlink control information (DCI) signaling used for aperiodic beam indication of the access link. The format of the indication for each type of additional information may be one of: one or more fields are added in the DCI signaling to indicate one or more pieces of additional information, which is a one-to-one mapping to the indicated beam index information of the access link; or one field is added in the DCI signaling to indicate the additional information, which is applicable for all indicated beam index information of the access link.

[0010] In some embodiments, at least one of the additional information can be indicated in new signaling. The new signaling may comprise at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. The beam information for the access link can be implicitly indicated by a specific beam index for the access link. The link level on / off information can be implicitly indicated by a specific beam index for the access link. The link level on / off information can be implicitly indicated by a time division duplex (TDD) configuration.

[0011] In some embodiments, when the backhaul link beam information is in the format of a transmission configuration indication (TCI) state, medium access control control element (MAC CE) signaling used to activate or deactivate one TCI state for the backhaul link from a radio resource control (RRC)-configured TCI state list of the control link can be reused to indicate one or more TCI states to be activated or deactivated from an RRC-configured TCI state list for the backhaul link, the control links including a first control link from the wireless communication node to the network node and a second control link from the network node to the wireless communication node. An upper layer parameter can be defined for the network node to distinguish whether the indicated TCI state in the MAC CE signaling is from the RRC-configured TCI state list of the backhaul link or the RRC-configured beam of the control link. The backhaul link beam information can be indicated in new signaling comprising at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. The RRC signaling used for periodic and / or semi-persistent access link beam indication can be used to update backhaul link beam information for one or more indicated access link beam indexes. A field for the backhaul link beam indication can be indicated in a pair with a field for the beam index for the access link configured in the list by the RRC signaling. When the field for the backhaul link beam indication is not indicated in the RRC signaling for periodic access link beam indication, the backhaul link beam information associated with the corresponding access link beam can refer to the backhaul link beam information indicated in the new signaling.The MAC CE signaling used for semi-persistent access link beam indication can be used to update backhaul link beam information for one or more indicated access link beam indexes. One or more fields for the backhaul link beam indication can be added in the MAC CE signaling to update corresponding backhaul link beam information for one or more indicated access link beams activated in the MAC CE signaling. When the backhaul link beam indication for an access link beam is not updated in the MAC CE signaling for semi-persistent access link beam indication, the backhaul link beam information associated with the corresponding access link beam can refer to the backhaul link beam information indicated in the new signaling.

[0012] In some embodiments, a network node may receive a list from a wireless communication node including one or more beam pairs, each beam pair including a first beam index configured for an access link and second beam information configured for a backhaul link. Each beam pair in the list may have a corresponding beam pair index. The list may be configured from the wireless communication node to the network node via at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. The list may be configured to the network node via an operation, administration, and maintenance (OAM) entity. The access link beam information in different beam pairs in the list may be the same or different. The backhaul link beam information in different beam pairs in the list may be the same or different. In an embodiment, the access link beam information in different beam pairs in the list may be different, and the backhaul link beam information in different beam pairs in the list may be the same or different.

[0013] In some embodiments, the access link beam information field can be reinterpreted to be used to indicate a beam pair index. A higher layer parameter can be configured for the network node to indicate whether the access link beam information field is used to indicate a beam pair index or an access link beam index. The backhaul link beam information can be obtained from the beam pair list according to the indicated access link beam index. When more than one backhaul link beam is obtained for the associated indicated access link beam and the network node supports simultaneous beam transmission on the backhaul link beam, the network node may simultaneously use the backhaul link beam with the associated access link beam. When more than one backhaul link beam is obtained for the associated indicated access link beam and the network node does not support simultaneous beam transmission on the backhaul link beam, a predefined rule can be defined for the network node to determine the backhaul link beam information for the associated access link beam. The predefined rule may include at least one of a backhaul link beam corresponding to an associated access link beam defined first in the beam pair list, a backhaul link beam corresponding to an associated access link beam defined last in the beam pair list, or a default backhaul link beam. One or more fields can be added in Medium Access Control Element (MAC CE) signaling of semi-persistent access link beam information to update the backhaul link beam information with respect to the access link beam information activated in the MAC CE signaling. [Brief explanation of the drawings]

[0014] Various exemplary embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and merely depict exemplary embodiments of the present solution to facilitate the reader's understanding of the present solution. As such, the drawings should not be considered limiting of the scope, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, the drawings are not necessarily drawn to scale.

[0015] [Figure 1] FIG. 1 illustrates an example cellular communication network in which the techniques disclosed herein may be implemented, in accordance with some embodiments of the present disclosure.

[0016] [Figure 2] FIG. 2 illustrates a block diagram of an example base station and user equipment device, in accordance with some embodiments of the present disclosure.

[0017] [Figure 3A] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure. [Figure 3B] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure. [Figure 3C] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure. [Figure 3D] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure. [Figure 3E] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure.

[0018] [Figure 4] FIG. 4 is a structure illustrating a conceptual model of a network-controlled repeater (NCR) according to some embodiments of the present disclosure.

[0019] [Figure 5] FIG. 5 illustrates an example of sub-band non-overlapping full duplex (SBFD) according to some embodiments of the present disclosure.

[0020] [Figure 6] FIG. 6 illustrates a flow diagram of an example method for resource information indication, according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0021] Detailed Description 1. Mobile communication technology and environment 1 illustrates an exemplary wireless communication network and / or system 100 in which the techniques disclosed herein may be implemented, according to certain embodiments of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as “network 100.” Such exemplary network 100 includes a base station 102 (hereinafter “BS 102,” also referred to as a wireless communication node), user equipment devices 104 (hereinafter “UE 104,” also referred to as a wireless communication device), which may communicate with each other via communication links 110 (e.g., wireless communication channels), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 overlaying a geographic area 101. In FIG. 1, the BS 102 and the UE 104 are contained within the respective geographic boundaries of the cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating in its allocated bandwidth and providing adequate radio coverage to its intended users.

[0022] For example, the BS 102 may operate within an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In this disclosure, the BS 102 and the UE 104 are generally described herein as non-limiting examples of “communication nodes” that may practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communication in accordance with various embodiments of the present solution.

[0023] 2 illustrates a block diagram of an exemplary wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. System 200 may include components and elements configured to support known or conventional operational features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols within a wireless communication environment, such as wireless communication environment 100 of FIG. 1, as described above.

[0024] The system 200 generally includes a base station 202 (hereinafter “BS 202”) and a user equipment device 204 (hereinafter “UE 204”). The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each of which is coupled and interconnected, as needed, with each other via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each of which is coupled and interconnected, as needed, with each other via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which may be any wireless channel or other medium suitable for the transmission of data as described herein.

[0025] As will be understood by those skilled in the art, system 200 may further include any number of modules other than those shown in FIG. 2 . Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software may depend on the particular application and design constraints imposed on the overall system. Those skilled in the art, familiar with the concepts described herein, may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0026] According to some embodiments, the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230, including a radio frequency (RF) transmitter and an RF receiver, each with circuitry coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in a time-duplexed manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210, including an RF transmitter and an RF receiver, each with circuitry coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in a time-duplexed manner. The operation of the two transceiver modules 210 and 230 may be coordinated in time such that the downlink transmitter is coupled to the downlink antenna 212 at the same time that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250. Conversely, the operation of the two transceivers 210 and 230 may be coordinated in time such that the uplink transmitter is coupled to the uplink antenna 232 at the same time that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250. In some embodiments, there is close time synchronization, with minimal guard time between duplex direction changes.

[0027] The UE transceiver 230 and the base station transceiver 210 are configured to communicate over a wireless data communication link 250 and cooperate with suitably configured RF antenna arrays 212 / 232 capable of supporting a particular wireless communication protocol and modulation scheme. In some demonstrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards and the like. However, it should be understood that the present disclosure is not necessarily limited in application to particular standards and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variations thereof.

[0028] According to various embodiments, the BS 202 may be, for example, an evolved NodeB (eNB), a serving eNB, a target eNB, a femto station, or a pico station. In some embodiments, the UE 204 may be embodied in various types of user devices, such as a mobile phone, a smartphone, a personal digital assistant (PDA), a tablet, a laptop computer, a wearable computing device, etc. The processor modules 214 and 236 may be implemented or realized using a general-purpose processor, a content-addressable memory, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. As such, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.

[0029] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, firmware, software modules, or any practical combination thereof, executed directly by processor modules 214 and 236, respectively. Memory modules 216 and 234 may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to processor modules 210 and 230, respectively, such that processor modules 210 and 230 may read information from and write information to memory modules 216 and 234, respectively. Memory modules 216 and 234 may also be integrated within their respective processor modules 210 and 230. In some embodiments, memory modules 216 and 234 may each include cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by processor modules 210 and 230, respectively.

[0030] The network communications module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bidirectional communications between the base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, the network communications module 218 may be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communications module 218 provides an 802.3 Ethernet interface so that the base station transceiver 210 may communicate with conventional Ethernet-based computer networks. As such, the network communications module 218 may include a physical interface for connection to a computer network (e.g., a mobile switching center (MSC)). As used herein with respect to specified operations or functions, the terms “configured for,” “configured to,” and variations thereof, refer to devices, components, circuits, structures, machines, signals, etc. that are physically constructed, programmed, formatted, and / or arranged to perform the specified operations or functions.

[0031] The Open Systems Interconnection (OSI) model (referred to herein as the "Open Systems Interconnection Model") is a conceptual and logical layout that defines the network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that open them to interconnect and communicate with other systems. The model is divided into seven subcomponents or layers, each representing a conceptual collection of services provided to the layers above and below it. The OSI model also defines logical networks and effectively describes computer packet transfers by using different layer protocols. The OSI model may also be referred to as the seven-layer OSI model or seven-layer model. In some embodiments, the first layer may be the physical layer. In some embodiments, the second layer may be the medium access control (MAC) layer. In some embodiments, the third layer may be the radio link control (RLC) layer. In some embodiments, the fourth layer may be the packet data convergence protocol (PDCP) layer. In some embodiments, the fifth layer may be the radio resource control (RRC) layer. In some embodiments, the sixth layer is a non-access stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer may be another layer.

[0032] Various exemplary embodiments of the present solution are described below with reference to the accompanying figures to enable those skilled in the art to make and use the present solution. As will be apparent to those skilled in the art, after reading this disclosure, various changes or modifications of the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, any specific order or hierarchy of steps in the methods disclosed herein is merely an example approach. Based on design preferences, the specific order or hierarchy of steps in a disclosed method or process can be rearranged while remaining within the scope of the present solution. Thus, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and that the present solution is not limited to the specific order or hierarchy presented, unless expressly stated otherwise. 2. Systems and methods for resource information indication

[0033] As New Radio (NR) systems move to higher frequencies (around 4 GHz for FR1 deployments and above 24 GHz for FR2), propagation conditions deteriorate compared to lower frequencies, exacerbating coverage challenges. As a result, further densification of cells may be required. While regular full-stack cell deployments are preferred, this may not always be possible (e.g., lack of backhaul availability) or an economically viable option. To provide blanket coverage in cellular network deployments at relatively low cost, RF repeaters with full duplex amplify and forward operation may be used in 2G, 3G, and 4G systems. However, the main problem posed by RF repeaters is that they amplify both signal and noise, increasing interference in the system.

[0034] To address this issue, a network-controlled repeater (NCR) can be considered. The NCR may be capable of receiving and processing side control information (SCI) from the network. To control the forwarding behavior of the NCR, some resource information can be utilized as indicated in the NCR.

[0035] Additionally, reconfigurable intelligent surfaces (RISs) can also be considered to enable controllable transfer. In such cases, the resource information indications discussed in this disclosure may be applicable to the RISs as well. The RISs may have a number of controllable reflective elements, which may be divided into element groups to facilitate efficient control. Each element group SCI may employ the resource information discussed below as part of the SCI.

[0036] In this disclosure, a method for indicating resource information used for forwarding operations of NCR is proposed for a wireless network. The method included in this disclosure is not limited to NCR, and may also be applicable to smart repeaters, extended RF repeaters, reconfigurable intelligent surfaces (RIS), and / or integrated radio access backhaul (IAB).

[0037] 3A-3E illustrate related aspects of resource information indication according to some embodiments of the present disclosure.

[0038] RF repeaters can be used in 2G, 3G, and 4G deployments to complement the coverage provided by a typical full-stack cell with various transmission power characteristics. RF repeaters can be the simplest and most cost-effective way to improve network coverage. The main advantages of RF repeaters can be their low cost, easy deployment, and the fact that they may not increase latency. The main disadvantage can be that RF repeaters may amplify signals and / or noise, which may contribute to increased interference (e.g., pollution) in the system. RF repeaters may not have beam management capabilities, which means / indicates that they cannot provide beamforming gain in their signal forwarding. Within RF repeaters, different categories can exist depending on their power characteristics and the amount of spectrum they are configured to amplify (e.g., single-band or multi-band). RF repeaters can be non-regenerative relay nodes and can amplify and forward everything they receive. The RF repeater may be a full duplex node and may not distinguish between uplink (UL) and downlink (DL) from the perspective of transmission and / or reception. With increasing traffic demands, there may be growing interest in new communication paradigms for future 5G / post-5G wireless networks.

[0039] The NCR can be located at a selected location with good radio channel conditions (e.g., with an LOS path) to the BS. Once the NCR is up and running, a network integration procedure can be performed. Through this network integration procedure, the BS can identify the NCR as a network node and configure the NCR for its subsequent amplify-and-forward operations. After integration is complete, the NCR can use control information received from the BS to perform amplify-and-forward operations for UEs in its coverage.

[0040] From a functionality perspective, the structure of the NCR is provided in FIG. 4. FIG. 4 is a structure illustrating a conceptual model of a network-controlled repeater (NCR) according to some embodiments of the present disclosure. The NCR controller maintains a control link (C-link) between the BS and the NCR, enabling information exchange and, for example, may carry side control information (SCI). The NCR-RU radio unit (RU) may use forwarding links (F-links), including F-links for backhaul (referred to as F-links 1 and 2 or backhaul links) and F-links for access (referred to as F-links 3 and 4 or access links), to transfer data between the BS and the UE. The behavior of the F-links can be controlled according to the SCI received from the BS.

[0041] To facilitate the forwarding operation of the NCR, control information, including beam information in particular, can be utilized for the NCR. The following agreements can be achieved regarding side control information indication of the NCR:

[0042] Beam Indication for Access Link: For each periodic beam indication for the access link, RRC signaling can be used to configure a list of transmission resources, where each transmission resource can be defined as {beam index, time resource}. Each time resource can be defined by {start slot defined as a slot offset in one period, start symbol defined by a symbol offset within the slot, duration defined by the number of symbols} using a dedicated field. The periodicity can be configured as part of the RRC signaling for the periodic beam indication, and the same periodicity can be assumed for all time resources in one periodic beam indication. A reference SCS can be configured as part of the RRC signaling for the periodic beam indication, and the same reference SCS can be assumed for all time resources in one periodic beam indication. For each aperiodic beam indication for the access link, a list of time resources can be predefined by RRC signaling. Each time resource can be defined by {start slot defined as a slot offset, start symbol defined by a symbol offset within the slot, duration defined by the number of symbols} using a dedicated field. The new DCI signaling may be used with one or more fields for indicating beam information, where each field refers to one beam index, and may also be used with one or more fields for indicating time resources defined by the RRC. The time indication and the beam indication in the DCI signaling may be sequentially associated with a one-to-one mapping. For semi-persistent beam indication for the access link, the RRC may configure one or more lists of forwarding resources, where each list may include one or more forwarding resources, and where each forwarding resource may be defined by {beam index, time resource}.Each time resource can be defined by {start slot defined as slot offset in one period, start symbol defined by symbol offset within the slot, duration defined by number of symbols} using a dedicated field. The periodicity and reference SCS can be configured as part of RRC signaling for each list of transmission resources. A new MAC-CE can be used to activate / deactivate one of all configured lists in RRC, and thus all transmission resources in this list can be selected. MAC-CE signaling can also optionally provide an update on the beam index in the transmission resources.

[0043] Beam indication for backhaul links: For backhaul links, semi-static beam indication can be considered. When the beam indication framework is used for NCR-MT, the DL beam can be indicated by the new MAC CE to select one of the TCI state IDs from the RRC configuration list of the beam for the C-link, while the UL beam can be indicated by the SRI on the C-link via new MAC CE signaling. When a separate beam indication framework is used for NCR-MT, both the DL and UL beams can be indicated by the new MAC CE to select one of the TCI state IDs from the RRC configuration list of the beam for the C-link.

[0044] NCR-Fwd On / Off Indication: The "on" state of NCR-Fwd can be implicitly indicated via the access link beam indication (e.g., if an AC link beam indication is present, NCR can be assumed to be on for the indicated time domain resource associated with the corresponding beam). The backhaul link can follow the access link in terms of on / off.

[0045] Sub-band Non-Overlapping Full Duplex (SBFD): SBFD is a new duplex mode in which a TDD carrier is subdivided into sub-bands, which can enable simultaneous transmission and reception in the same slot. Figure 5 illustrates an example of Sub-band Non-Overlapping Full Duplex (SBFD) in accordance with some embodiments of the present disclosure. In Figure 5, UL sub-bands (SB) can be supported to be configured in DL and / or flexible symbols / slots. Implementation Example 1: Contents of resource information that can be used as shown for NCR forwarding operations

[0046] In the present disclosure, beam information for the access link can be indicated by the BS to the NCR to enable and control the forwarding behavior of the NCR. The beam indication method for the access link of the NCR may include periodic beam indication, semi-persistent beam indication, and / or aperiodic beam indication. In addition to the beam information for the access link, at least one of the following information is also utilized to be indicated by the BS to the NCR:

[0047] (1) The frequency information for the access link can be used to indicate frequency resources for the access link. For example, when the NCR-Fwd has multiple carriers / bands for the access link, the frequency information can be indicated to the NCR to indicate the carriers / bands that can be used when the NCR forwards signals on the access link.

[0048] (2) Panel information for an access link can be used to indicate the panel information for the access link. For example, when an NCR-Fwd has multiple panels / TRPs for an access link, the panel information can also be indicated.

[0049] (3) Link-level on / off information can be used to indicate the on / off state of one or more links. In this disclosure, the “on” state of NCR-Fwd is implicitly indicated via an access link beam indication, and the backhaul link follows the access link in terms of on / off state. Thus, if the access link has a beam indication and is “on” for the corresponding time resource, the backhaul link can also remain “on.” However, sometimes, link-level on / off can be utilized for certain cases. For example, to measure self-interference, the access link can remain “on,” while the backhaul link needs to remain “off” for a certain duration. For another example, to achieve UL-dedicated forwarding, forwarding links 2+4 can be “on,” while forwarding links 1+3 can remain “off.” Therefore, link-level on / off indication can be utilized to achieve link-level on / off for NCR-Fwd.

[0050] (4) The beam information for the backhaul link may represent beam information that can be used for NCR forwarding operations for the backhaul link. In the present disclosure, because the C link and the backhaul link operate within the same band, the beam information indication for the backhaul link may share the same spatial filter of the C link, and therefore, the beam information for the backhaul link may share the same RRC configuration of the beam for the C link or reuse the SRI of the C link. However, in some cases, the spatial filter of the C link cannot be shared with the backhaul link, which means that the RRC configuration of the beam for the C link cannot be shared with the backhaul link. For example, when the C link and the backhaul link operate within different bands (e.g., the C link operates in FR1 while the backhaul link operates in FR2), or when the C link and the backhaul link operate in different panels, or when the NCR-MT and NCR-Fwd are in different locations, the RRC configuration list of TCI states for the C link cannot be shared with the backhaul link. In such a method, new beam indication methods for the backhaul link can be considered.

[0051] (5) The frequency information for the backhaul link can be used to indicate the frequency resources used for the backhaul link. For example, when the NCR-Fwd has multiple carriers / bands for the backhaul link, the frequency information used for forwarding operations of the backhaul link can be indicated to the NCR.

[0052] (6) Panel information for a backhaul link can be used to indicate panel information used for the backhaul link. For example, when an NCR-Fwd has multiple panels / TRPs for a backhaul link, the panel information used for forwarding operations of the backhaul link can also be indicated to the NCR.

[0053] (7) UL / DL information for the access link and / or backhaul link can be used to indicate direction information for the access link beam indication and / or the backhaul link beam. For example, when NCR-Fwd supports subband non-overlapping full duplex, this may indicate / mean that NCR-Fwd can simultaneously operate DL and UL transmissions on the access link during the SBFD symbol / slot. In such a way, NCR-Fwd can know whether the indicated beam on the SBFD symbol / slot is used for DL ​​or UL transmission, and thus the UL / DL information can be utilized. Implementation Example 2: How to inform BS of NCR capability information

[0054] As introduced in implementation example 1, frequency information, panel information for access links and / or backhaul links, and backhaul link beam information may also be indicated in association with the access link beam information from the BS to the NCR. Before the indication, the BS may know capability information about the frequency information, panel information, and / or backhaul link beam information of the NCR-Fwd. In such a case, the following aspects may be considered.

[0055] Aspect 1: How BS understands capability information Option 1: Capability information can be configured in the BS via OAM. · Option 2: Capability information can be reported from the NCR to the BS.

[0056] Aspect 2: What competency information may contain The capability information related to frequency information may include at least one of the following: (1) the number of frequency resources supported on the NCR-Fwd for the access link and / or backhaul link, (2) the number of frequency resources for simultaneous transmission supported on the NCR-Fwd for the access link and / or backhaul link, (3) frequency shift capability, (4) frequency information allocation for the access link and / or backhaul link, or (5) SBFD capability. Regarding the number of frequency resources for simultaneous transmission supported on the NCR-Fwd, the frequency resource may be a carrier, a BWP, or a passband. Regarding frequency shift capability, the frequency shift capability may be used to indicate whether the NCR-Fwd supports frequency shift on the access link and / or backhaul link. Regarding SBFD capability, the SBFD capability may be used to indicate whether the NCR-Fwd can support SBFD on the access link and / or backhaul link. With respect to frequency information allocation for the access link and / or backhaul link, the frequency information allocation for the access link and / or backhaul link may be a subband or passband allocation for the access link and / or backhaul link. The capability information related to the panel information may include at least one of the following: (1) the number of panels supported on the NCR-Fwd; or (2) the number of panels for simultaneous transmission supported on the NCR-Fwd. Regarding the number of panels supported on the NCR-Fwd, the number of panels may be panel information supported on the NCR-Fwd for the access link and / or the backhaul link, respectively. Regarding the number of panels for simultaneous transmission supported on the NCR-Fwd, the number of panels for simultaneous transmission supported on the NCR-Fwd may be simultaneously operated panel information supported on the NCR-Fwd for the access link and / or the backhaul link, respectively. The capability information related to beam information for the access link and / or backhaul link may include at least one of the following: (1) the number of beams supported for the backhaul link and / or access link, (2) the number of beams that can be simultaneously transmitted for the backhaul link and / or access link, (3) the beam arrangement / association for the backhaul link and / or access link, (4) the beam used for the backhaul link and / or access link, (5) the number of beams used for the backhaul link and / or access link, or (6) the beam index for the backhaul link and / or access link. Implementation Example 3: Formatting and Interpreting Resource Information

[0057] As discussed above, the resource information can have an explicit indication or an implicit indication. If the explicit indication is considered, the format of the resource information can have the following options, respectively:

[0058] (1) The format and interpretation of the frequency information may include at least one of the following options, which may be applicable for both the access link frequency information and the backhaul link frequency information. Option 1: Use logical indexing to indicate frequency information. Example 1: In some embodiments, when multiple carriers or multiple bands are considered for NCR-Fwd, the logical index can be interpreted as one of a carrier index, a passband index, or a bandwidth portion (BWP) index. For example, in an NR system, a NBWP-dedicated BWP can be configured for each NCR. For example, if NBWP=4, 2 bits can be used for the BWP index. Similarly, the bit size can be determined when multiple carriers are configured. Example 2: In some embodiments, when NCR-Fwd supports SBFD, the logical index can be interpreted as a subband index. Example 3: In some embodiments, the logical index can be interpreted as a cell ID or cell index. For example, when multiple carriers or multiple bands are considered for NCR-Fwd, a single carrier can be used as the SCell. In such a way, the cell ID can be used to indicate frequency information to indicate different carriers for beam information. · Option 2: Start PRB and / or Start RE + End PRB and / or End RE. · Option 3: Starting PRB and / or Starting RE + number of consecutive PRBs and / or number of consecutive REs. · Option 4: Absolute Radio Frequency Channel Number (ARFCN). · Option 5: Global Synchronization Raster Channel Number (GCSN). Option 6: One or more offset values ​​from reference or specific frequency information. For example, if the BS desires to indicate frequency information for the access link, the reference frequency information may be predefined frequency information or frequency information for the backhaul link. If frequency information for the access link is indicated in the NCR, the reference information for the DL frequency information and UL frequency information for the access link may be the same or different. If frequency information for the backhaul link is indicated in the NCR, the reference information for the DL frequency information and UL frequency information for the backhaul link may be the same or different. The offset value may be a positive or negative value. In some embodiments, if frequency information for the access link is indicated in the NCR, there may be the same or different indicated offset values ​​for the DL and UL frequency information for the access link. If frequency information for the backhaul link is indicated in the NCR, there may be the same or different indicated offset values ​​for the DL and UL frequency information for the backhaul link. In some embodiments, the format of the offset value may be the number of PRBs and / or the number of REs. Example 1: Frequency information can be fixed for the backhaul link. In this way, the BS can indicate frequency information for the access link to the NCR. The frequency information for the backhaul link can be treated as reference information, and therefore, one or more offset values ​​are indicated to the NCR from the OAM or the BS for the access link frequency information indication. In some embodiments, if the frequency information for the DL and UL of the access link is different, two offset values ​​can be indicated in the NCR. The offset values ​​can be positive or negative. For example, if the frequency information for the backhaul link is f0, two positive offset values ​​delta1 and delta2 can be indicated in the NCR for the DL and UL, respectively. The frequency information used for DL ​​transmission of the access link can be f0 + delta1, and the frequency information used for UL reception of the access link can be f0 + delta2. In other examples, a positive value delat1 and a negative value delat2 can be indicated in the NCR for the DL and UL, respectively. Thus, the frequency information used for DL ​​transmission of the access link may be f0+delta1, and the frequency information used for UL reception of the access link may be f0-delta2. In other embodiments, if the frequency information for DL ​​and UL of the access link is identical, one offset value may be indicated in the NCR. Example 2: The frequency information of the access link can be fixed. Therefore, the frequency information can be indicated to the NCR by treating the access link beam information as a reference point. For example, the frequency information of the access link can be f1, which is the same for DL ​​and UL. If the frequency information for DL ​​and UL of the backhaul link is the same, one offset value can be indicated to the NCR. Example 3: The frequency information of the backhaul link can be fixed. The frequency information for DL ​​can be f0. The frequency information for UL can be f1. Thus, when indicating the access link frequency information, if the DL and UL frequency information for the access link are different, the reference information for the frequency information of DL transmission and UL reception of the access link can be different. For example, the reference information for the frequency information of DL transmission of the access link can be the DL frequency information of the backhaul link, while the reference information for the frequency information of UL reception of the access link is the UL frequency information of the backhaul link. Thus, two positive offset values ​​delta1 and delat2 can be indicated for the DL and UL of the access link, respectively. Therefore, the frequency information used for DL ​​transmission of the access link can be f0+delat1, and the frequency information used for UL transmission of the access link can be f1+delta2. Example 4: The frequency information of the backhaul link may be fixed as f0. The frequency information of the backhaul link may be treated as reference information, and therefore, one or more offset values ​​may be indicated from the OAM or BS to the NCR for the frequency information indication of the access link. In some embodiments, if the frequency information for the DL and UL of the access link is different, two offset values ​​delta1 and delta2 may be indicated to the NCR for the DL and UL of the access link, respectively. In some examples, the indicated offset values ​​may be integer values ​​that do not represent positive or negative. The frequency information of the access link may be obtained by a default rule or a predefined rule, which may add an offset value to the reference frequency information or may subtract the indicated offset value from the reference frequency information. Thus, if the default rule is that the access link frequency information is obtained by adding the indicated offset value to the reference frequency information, the frequency information for the DL and UL of the access link is f0+delta1, f0+delta2, respectively. In some embodiments, a higher layer parameter can be configured from the BS to the NCR to indicate whether the frequency information of the access link is obtained by adding or subtracting an offset value to or from the reference frequency information.

[0059] In some embodiments, the start PRB, the end PRB, the number of consecutive PRBs, the start RE, the end RE, and the number of REs can be represented by a PRB number and an RE number, respectively. In addition, the start PRB and the end PRB can also be represented by an offset from a reference point (e.g., point A).

[0060] (2) The format and interpretation of the panel information may include at least one of the following options, which may be applicable for both the access link panel information and the backhaul link panel information: · Option 1: Panel ID / Index. · Option 2: Antenna Group ID / Index.

[0061] (3) The format and interpretation of link level on / off information may include at least one of the following options: Option 1: A new field may be used to indicate the on / off state of at least one of the following links: Transfer Link 1, Transfer Link 2, Transfer Link 3, or Transfer Link 4.

[0062] The following example is provided to further illustrate the interpretation of this field. Example 1: A new field may have 1 bit. In some embodiments, a bit value of 0 may represent an off state of the access links (e.g., forwarding links 3 and 4), and a bit value of 1 may represent an off state of the backhaul links (e.g., forwarding links 1 and 2). In other embodiments, a bit value of 1 may represent an off state of the access links (e.g., forwarding links 3 and 4), and a bit value of 0 may represent an off state of the backhaul links (e.g., forwarding links 1 and 2). Example 2: The new field may have two bits, and different values ​​may represent different on / off states for different links. In some embodiments, bit value 0 represents that only forwarding link 1 is "on", bit value 1 represents that only forwarding link 2 is "on", bit value 2 represents that only forwarding link 3 is "on", and bit value 4 represents that only forwarding link 4 is "on". Example 3: The new field may have two bits, and different values ​​may represent different on / off states for different combinations of links. In some embodiments, bit value 0 represents that only forwarding links 1 and 2 are "on", bit value 1 represents that only forwarding links 3 and 4 are "on", bit value 2 represents that only forwarding links 1 and 3 are "on", and bit value 3 represents that only forwarding links 2 and 4 are "on". In other embodiments, bit value 0 represents that forwarding links 1 and 2 are "off", bit value 1 represents that forwarding links 3 and 4 are "off", bit value 2 represents that forwarding links 1 and 3 are "off", and bit value 3 represents that forwarding links 2 and 4 are "off".

[0063] (4) The format and interpretation of the beam information for the backhaul link may include at least one of the following options: Option 1: Beam Index. The backhaul link can also use the beam index to represent beam information. Option 2: TCI State. The backhaul link can use TCI state to represent beam information. Since the RRC configuration of TCI state for the C-link cannot be shared with the backhaul link, a dedicated TCI state list for the backhaul link can be configured for NCR-Fwd from the BS via at least one of RRC, MAC CE, or DCI signaling, or via OAM. However, since no dedicated reference signal is used for the backhaul link, the following options can be considered regarding the format of the TCI state configured for the backhaul link: Alternative 2.1: The current format of the TCI state can be reused, and a set of logical reference signal (e.g., CSI-RS) indices / IDs can be defined for NCR-Fwd by the BS or by OAM. The defined logical reference signal indices / IDs can be mapped to corresponding transmission beams in NCR-Fwd for the backhaul link, and the mapping relationship can be indicated by the BS to NCR-Fwd via at least one of RRC, MAC CE, and DCI signaling, or to NCT-Fwd and / or the BS via OAM. In such a method, the logical reference signal IDs can be used in the TCI state configured for the backhaul link. Alternative 2.2: A new type of TCI state can be defined to indicate beam information for the backhaul link. The format of the new type of TCI state can directly include a logical index / ID instead of a reference signal with QCL type D. The logical index / ID can be mapped to a forwarding beam of NCR-Fwd on the backhaul link. This new type of TCI state may be absent for the UE and only applicable for NCR.

[0064] (5) The format and interpretation of the UL / DL direction information may include at least one of the following options: Option 1: A bit field to indicate the applicable UL / DL direction for both the access link and the backhaul link. Option 2: Two separate bit fields, one bit field can be used to indicate the UL / DL direction for the access link and the other bit field can be used to indicate the UL / DL direction for the backhaul link. Implementation Example 4: A method for indicating the above resource information associated with a beam indication for an access link

[0065] There may be multiple resource information introduced in Implementation Example 1, and the format of the resource information may have different options, which are referred to in Implementation Example 3. The signaling of resource information may be considered using the following cases. The resource information referred to in the following cases and options may refer to any of the resource information described in Implementation Example 1. Different resource information may have the same or different signaling options, which are referred to below.

[0066] Case 1: Resource information can be indicated separately from the beam indication for the access link. In such a method, the resource information can be indicated via at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling, which are signalings separate from the beam indication for the access link. A combination of different layer signaling can also be considered as a possibility to save signaling costs. Different resource information can be indicated in the same signaling or different signaling. Option 1: RRC only, MAC CE only, and / or DCI only. Semi-static or common resource information can be configured or indicated via RRC signaling and / or MAC CE signaling, which may not change frequently. The main benefit is saving dynamic signaling costs. For example, if common access link frequency information applies for all beam indications for the access link, this can be configured via RRC signaling and / or MAC CE signaling. Option 2: RRC+MAC CE+DCI, RRC+DCI, MAC CE+DCI, and / or RRC+MAC CE. A set of candidate resource information can be configured via RRC signaling. Then, the MAC CE and / or DCI can be used to activate / deactivate a subset of resource information from the candidate resource set or one of them. For example, a list of TCI states dedicated to beam indication of the backhaul link can be configured via RRC signaling. The format of the TCI state for the backhaul link may refer to Implementation Example 3. One or more of the TCI states can be activated / deactivated from the list via MAC CE signaling. For another embodiment, a list of TCI states for beam indication of the backhaul link can be configured via RRC signaling. One or more of the TCI states can be selected from the list via DCI signaling.

[0067] Regarding backhaul link beam information, as in the backhaul link beam indication of the NCR, MAC CE signaling can be used to activate / deactivate the TCI state from the RRC-configured beam list of the C-link. In such a case, a list of TCI states dedicated to the beam indication of the backhaul link can be configured via RRC signaling, and if the format of the TCI state for the backhaul link may refer to Implementation Example 3, MAC CE signaling can be reused with some interpretation. The TCI state activated or deactivated in this MAC CE signaling can be from the dedicated TCI state list configured for the NCR-Fwd. In some embodiments, a higher layer parameter can be defined to distinguish whether the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the C-link or the backhaul link. For example, a bit field can be defined in which a bit value of 1 may represent that the TCI state activated / deactivated in MAC CE signaling is from the RRC configured beam of the backhaul link, and a bit value of 0 may represent that the TCI state activated / deactivated in MAC CE signaling is from the RRC configured beam of the C-link (or vice versa). In other embodiments, if this higher layer parameter is configured, it may indicate / mean that the TCI state activated / deactivated in MAC CE signaling is from the RRC configured beam of the backhaul link. If not configured, it may indicate / mean that the TCI state activated / deactivated in MAC CE signaling is from the RRC configured beam of the C-link.

[0068] Case 2: Resource information can be explicitly indicated in the same signaling together with the beam indication of the access link. Three different beam indication mechanisms for the access link (e.g., periodic, aperiodic, and semi-persistent beam indication methods) can exist, and these three beam indication mechanisms may include RRC signaling, MAC CE signaling, and / or DCI signaling. The method of signaling resource information together with the beam indication of the access link can be considered from the following options: Option 1: For periodic and semi-persistent access link beam indication, RRC signaling can be used to configure a list of forwarding resources, where each forwarding resource can be defined as {beam index, time resource}. In such a method, a new field can be added in the forwarding resources of the RRC signaling to indicate the resource information, which may mean that each forwarding resource is defined as {beam index, resource information for access link, time resource}. In some embodiments, the new field may be optional. If this field is not configured, default or predefined resource information can be used for the indicated access link beam if this field is not configured in the forwarding resources. The default or predefined resource information can be configured in the NCR via an operation, administration, and maintenance (OAM) entity. Example 1: Backhaul link beam information can be indicated in the transmission resource. In such a method, the transmission resource in the RRC signaling can be defined as {access link beam index, backhaul link beam information, time resource}. Option 2: For the current periodic and semi-persistent access link beam indication, RRC signaling can be used to configure a list of transmission resources, where each transmission resource can be defined as {beam index, time resource}. In such a case, for the RRC signaling of periodic beam indication and the RRC signaling of semi-persistent beam indication, a new field for resource information indication can be configured as part of the RRC signaling, and the same resource information can be assumed for all indicated access link beams in one list of transmission resources. -Example 1: Regarding periodic beam indication for an access link, a field can be added in the corresponding RRC signaling to indicate applicable resource information (e.g., frequency information for the access link) for all indicated access link beams in the list, which is similar to the periodicity and SCS configuration in periodic beam indication. Example 2: For semi-persistent beam indication for an access link, a field can be added in the corresponding RRC signaling to indicate resource information applicable for all indicated access link beams in a list (e.g., panel information for the access link), which is similar to the periodicity and SCS configuration in semi-persistent beam indication. Furthermore, in the present disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list can include one or more forwarding resources. MAC-CE signaling can be used to activate / deactivate one of all configured lists in the RRC signaling. All forwarding resources in this list can be selected. MAC-CE signaling can also optionally provide an update regarding the beam index in the forwarding resources. In such a method, in some embodiments, if a new field is added in the RRC signaling and is common for all forwarding resources in the list, the MAC-CE can also optionally provide an update regarding the resource information in the forwarding resources to enable flexibility. -Example 3: With respect to backhaul link beam information configured in RRC signaling that is applicable for all transfer resources in a list, if the NCR wishes to update the backhaul link beam that can be used for some transfer resources of the list activated by MAC CE signaling, MAC CE signaling can optionally be used to provide an update regarding the backhaul link beam for some transfer resources. Option 3: In this disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list can consist of one or more forwarding resources. MAC-CE signaling can be used to activate / deactivate one of all configured lists in RRC. All forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide an update on the beam index in the forwarding resources. In such a case, a new field can be added in MAC-CE signaling to indicate resource information, which can be common for all forwarding resources in the activated list. Option 4: In this disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list may include one or more forwarding resources. MAC-CE signaling can be used to activate / deactivate one of all configured lists in the RRC signaling. All forwarding resources in this list can be selected. MAC-CE signaling can also optionally provide an update on the beam index in the forwarding resources. In such a case, one or more fields can be added in the MAC-CE signaling to indicate resource information, which can be sequentially one-to-one mapping to the forwarding resources in the activated list. The number of fields added in the MAC-CE can be the same as the number of forwarding resources in the activated list. Option 5: In the present disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling can be used with one or more fields to indicate beam information. Each field references one beam index, and one or more fields can indicate the time resources defined by RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with one-to-one mapping. In such a method, one or more fields can be added in DCI signaling to indicate resource information, and this indicated resource information can be sequentially associated with access link beam information and time resource information in DCI signaling using one-to-one mapping. Option 6: In this disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling can be used with one or more fields to indicate beam information. Each field references one beam index, and one or more fields can indicate the time resource defined by RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with a one-to-one mapping. In such a method, a new field can be added in DCI signaling to indicate resource information, and this indicated resource information can be applicable for all indicated access link beams and time resources in the DCI signaling. Option 7: In the present disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling can be used with one or more fields to indicate beam information. Each field references one beam index, and one or more fields can indicate the time resource defined by the RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with a one-to-one mapping. In such a manner, a new field can be added in the corresponding RRC signaling to indicate resource information, and this indicated resource information can be applicable for all indicated access link beam and time resource information in the DCI signaling.

[0069] Case 3: Resource information can be configured in signaling separate from the access link. Beam indication and resource information can be updated within the access link beam indication signaling. As described in Case 1 of Implementation Example 4, resource information can be indicated to the NCR via signaling different from the access link beam indication, and all options listed in Case 1 of Implementation Example 4 can be considered. In such a case, to allow flexibility and dynamism, the following alternatives can be considered: Alternative 1: For periodic access link beam indication and / or semi-persistent access link beam indication, a new field can be added in the forwarding resource of the RRC signaling, which may mean that each forwarding resource is defined as {beam index for access link, resource information, time resource}. This field may be optional. If the NCR wants to update corresponding resource information for some forwarding resources, this field can be configured in the forwarding resource. If not configured, the resource information associated with the indicated access link beam may refer to resource information in separate signaling as described in Case 1 of Implementation Example 4. -Example 1: Backhaul link beam information can be indicated in new signaling as described in any of the options of Case 1 in Implementation Example 4. This backhaul link beam information can be treated as an initial backhaul link beam. If the backhaul link beam information field in some transport resources is configured, the configured backhaul link beam can be used for these transport resources. For those transport resources where the backhaul link beam information field is not configured, the initial backhaul link beam indicated in dedicated signaling can be used. · Alternative 2: For semi-persistent access link beam indication, MAC CE signaling may optionally update resource information for some forwarding resources in the list to be activated. Example 1: Frequency information for the access link can be indicated in new signaling as described in any of the options of Case 1 in Implementation Example 4. For semi-persistent access link beam indication, MAC CE signaling may have activated a list, and if frequency information for some forwarding resources requires a change, MAC CE signaling can optionally be used to update the access link frequency information for some forwarding resources in the activated list.

[0070] As mentioned in the above options of Cases 1, 2, and 3, MAC CE signaling can be used to update resource information for some forwarding resources in the RRC list to be activated. Thus, the following options can be considered regarding the format of the MAC CE signaling for updating resource information: Option 1: One or more fields may be added in the MAC CE signaling to indicate the forwarding resource index, and one or more fields may be added in the MAC CE signaling to indicate the updated resource information. The one or more fields for the forwarding resource index and the one or more fields for the updated resource information may be sequentially associated with a 1-to-N (N≧1) mapping or an N-to-1 (N≧1) mapping. In some embodiments, a new field may be added in the MAC CE signaling to indicate whether there is updated resource information in this MAC CE signaling. Option 2: A bitmap may be indicated in the MAC CE signaling to indicate one or more forwarding resources that require updating of resource information, where each bit in the bitmap may correspond to a forwarding resource, and the bit value represents whether the corresponding forwarding resource needs to update its resource information. If one or more forwarding resources require updating of their resource information, one or more fields may be added in the MAC CE signaling to indicate updated resource information for the corresponding forwarding resources, respectively. For example, a bit value of 1 may represent that the corresponding forwarding resource needs to update its resource information, while a bit value of 0 may represent that the corresponding forwarding resource does not need to update its resource information, or vice versa. For example, if the RRC list to be activated includes three transfer resources, a bitmap 110 including three bits can be used in MAC CE signaling, where the least significant bit in the bitmap corresponds to the first transfer resource in the RRC list to be activated, the second bit represents the second transfer resource in the RRC list to be activated, and the most significant bit in the bitmap represents the last transfer resource in the RRC list to be activated. Thus, if a bit value of 1 indicates that the corresponding transfer resource needs to update resource information, this may mean that the second and last transfer resources need to update resource information, and then two fields are indicated in MAC CE signaling to indicate the updated resource information for the second and last transfer resources, respectively. For another example, if the most significant bit in the bitmap represents the first transfer resource in the RRC list to be activated and the second bit represents the second transfer resource, then the least significant bit represents the last transfer resource.Thus, this may mean that the first and second forwarding resources in the activated RRC list require updating of resource information, and two fields may also be indicated in the MAC CE signaling to update the resource information for the first and second forwarding resources, respectively. In some embodiments, a new field may be added in the MAC CE signaling to indicate whether there is updated resource information in this MAC CE signaling.

[0071] Case 4: Resource information can be implicit.

[0072] 1. Panel information can be implicitly shown using at least one of the following options: Option 1: Implicitly indicated by the beam index for the access link. In some embodiments, beams on different panels may have different beam indices, and thus the panel information may be implicitly indicated via the beam index. Option 2: If only one panel is operated, there may not be any need to show panel information. Option 3: Default panel information can be predefined for NCR. In the absence of any explicit indication regarding panel information, the default panel information can be considered for the beam.

[0073] 2. Link level on / off information can be indicated implicitly using at least one of the following options: Option 1: Implicitly indicated by the beam index. One or more specific beam indices can be used to indicate link level on / off states, and each specific beam index can be used to indicate link level on / off states for at least one of the following links: forwarding link 1, forwarding link 2, forwarding link 3, or forwarding link 4. The specific beam indexes mentioned above can have the following alternatives: Alternative 1.1: These specific beam indices can be used to indicate link level on / off states, and the specific beam indices can also correspond to physical beams of the access link. To understand whether the indicated specific beam indices have a meaning for implicitly indicating link level on / off states, a higher layer parameter can be configured to enable / disable implicit link level on / off indication by the beam indices. In some embodiments, the higher layer parameter can be a bit field, where a bit value of 0 may represent that the specific beam indices can be used to implicitly indicate link level on / off states, and a bit value of 1 may represent disabling of the link level on / off state implicitly indicated by the specific beam indices. In some embodiments, if this higher layer parameter is configured, this may mean that the specific beam indices can also be used to implicitly indicate link level on / off states, and if this higher layer parameter is not configured, this may mean that the beam indices are only used to indicate beam information. The higher layer parameters may be configured in at least one of RRC signaling, MAC CE signaling, or DCI signaling. The following example is given to gain a deeper understanding of Alternative 1.1. Example 1: A specific beam index 0 may represent that the access link 3 is "on" while the backhaul link is "off." In such a manner, when the NCR receives beam indication 0 from the BS, the NCR can turn on the access link, use access link beam 3, and terminate forwarding operations. Example 2: A specific beam index 0 may represent that the access link 3 is "on" while the backhaul link is "off." Higher layer parameters can be configured for the NCR to indicate that the link-level on / off state is implicitly indicated by the beam index. In such a manner, if the NCR receives beam indication 0 from the BS, the NCR may turn off the backhaul link, use beam 1, and terminate forwarding operations. In some embodiments, if the higher layer parameters are not configured or are configured to not enable the link-level on / off state, when the NCR receives beam indication 0 from the BS, the NCR may directly use beam 1, terminate forwarding operations, and not turn off the backhaul link. Alternative 1.2: These specific beam indexes can be used to indicate link level on / off states, and the specific beam indexes may not correspond to physical beams of the access link. In such a way, when the NCR receives these specific beam indexes, the NCR may understand / recognize that the specific beam index indicated is not actual beam information, but may be used to implicitly indicate link level on / off states. Example 1: When NCR has 10 beams on the access link and BS can use 4 bits to indicate the beam information on the access link, in such a way, beam index 11 can be used to indicate that NCR-Fwd can turn off the access link and keep the backhaul link on. Option 2: In some embodiments, when time domain resources associated with beams for a backhaul link are indicated separately from the access link, link level on / off states for the backhaul link and the access link can be implicitly indicated separately by beam information for the access link and the backhaul link. For the backhaul link, specific beam information (e.g., TCI state or beam index) can be used to implicitly indicate link level on / off states, including at least one of forwarding link 1 and forwarding link 2. For the access link, specific beam index can be used to implicitly indicate link level on / off states, including at least one of forwarding link 3 and forwarding link 4. Option 3: Implicitly indicated by the time division duplex (TDD) configuration. For example, if the TDD configuration for the corresponding indicated time resource is UL, this may mean that only forward links 2 and 4 may be turned on, and forward links 1 and 3 may be turned off. In some embodiments, a dedicated TDD configuration may be configured for NCR-Fwd. In such a way, if NCR-Fwd is used for UL forwarding, the dedicated TDD configuration for NCR-Fwd may have UL symbols and flexible symbols, which implicitly means that only forward links 2 and 4 may be turned on, while forward links 1 and 3 may be turned off. Implementation Example 5: Beam Information Indication for Backhaul Links

[0074] In the present disclosure, because the C link and the backhaul link operate within the same band, the beam information indication for the backhaul link may share the same spatial filter of the C link, and therefore, the beam information for the backhaul link can share the same RRC configuration of the beam for the C link. However, in some cases, the spatial filter of the C link cannot be shared with the backhaul link, which means that the RRC configuration of the beam for the C link cannot be shared with the backhaul link. For example, when the C link and the backhaul link operate in different bands (e.g., the C link operates in FR1 while the backhaul link operates in FR2), or when the C link and the backhaul link operate in different panels, or when the NCR-MT and NCR-Fwd are in different locations, the RRC configuration list of the TCI state for the C link cannot be shared with the backhaul link. In such a method, a new beam indication method for the backhaul link can be considered.

[0075] The format of the beam information for the backhaul link may refer to the options for backhaul link beam information described in implementation example 3.

[0076] Case 1: Beam information for the backhaul link and beam information for the access link can be indicated in different signaling. In such a method, the backhaul link beam information can be indicated via at least one of RRC signaling, MAC CE signaling, or DCI signaling, which can be signaling separate from the beam indication for the access link. A combination of different layer signaling can also be considered as a possibility to save signaling costs. Option 1: RRC only, MAC CE only, and / or DCI only. Semi-static or common backhaul link beam information can be configured or indicated via RRC signaling and / or MAC CE signaling, which may not change frequently. The main benefit is saving dynamic signaling costs. For example, if a common backhaul link beam is applied for all beam indications for the access link, this can be configured via RRC signaling and / or MAC CE signaling. Option 2: RRC+MAC CE+DCI, RRC+DCI, MAC CE+DCI, and / or RRC+MAC CE. A set of candidate backhaul link beam information can be configured via RRC signaling. The MAC CE and / or DCI can then be used to activate / deactivate a subset of or one of the backhaul link beams from the candidate resource set. In some embodiments, if more than one backhaul link beam information is activated, the number of activated backhaul link beams may be the same as the number of indicated access link beams. For example, a list of TCI states dedicated to beam indication of the backhaul link can be configured via RRC signaling, and the format of the TCI states for the backhaul link may refer to Implementation Example 3. One or more of the TCI states can be activated / deactivated from the list via MAC CE signaling. For another embodiment, a list of TCI states for beam indication of the backhaul link can be configured via RRC signaling. One or more of the TCI states can be selected from the list via DCI signaling. Option 3: For backhaul link beam indication of NCR, MAC CE signaling can be used to activate / deactivate the TCI state from the RRC-configured beam list of the C-link. In such a case, a list of TCI states dedicated to the beam indication of the backhaul link can be configured via RRC signaling, and if the format of the TCI state for the backhaul link may refer to Implementation Example 3, MAC CE signaling can be reused with some interpretation. The TCI state activated or deactivated in this MAC CE signaling can be from the dedicated TCI state list configured for NCR-Fwd. In some embodiments, a higher layer parameter can be defined to distinguish whether the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the C-link or the backhaul link. For example, a bit field can be defined where a bit value of 1 may represent that the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the backhaul link, and a bit value of 0 may represent that the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the C-link (or vice versa). In other embodiments, if this higher layer parameter is configured, this may mean that the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the backhaul link. If not configured, this may mean that the TCI state activated / deactivated in MAC CE signaling is from the RRC-configured beam of the C-link.

[0077] Case 2: The beam information for the backhaul link and the beam information for the access link can be indicated in the same signaling. In such a case, at least one of the following options can be considered: Option 1: For periodic and semi-persistent access link beam indication, RRC signaling can be used to configure a list of forwarding resources, where each forwarding resource can be defined as {beam index for access link, time resource}. In such a way, since a backhaul link beam is always associated with an access link beam to terminate DL / UL forwarding operations, a new field can be added in the forwarding resources of the RRC signaling, which can mean that each forwarding resource is defined as {beam index for access link, beam information for backhaul link, time resource}. Option 2: For periodic and semi-persistent access link beam indication, RRC signaling can be used to configure a list of transfer resources, where each transfer resource can be defined as {beam index for access link, time resource}. In such a manner, since the communication conditions between the BS and the NCR do not change frequently, a common backhaul link beam can be considered for the indicated access link beams of all transfer resources in the list. In such a case, for the RRC signaling of periodic beam indication and the RRC signaling of semi-persistent beam indication, a new field for backhaul link beam information can be configured as part of the RRC signaling, and the same backhaul beam can be assumed for all indicated access link beams in one list of transfer resources. In the present disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of transfer resources. Each list may include one or more transfer resources. MAC CE signaling can be used to activate / deactivate one of all configured lists in the RRC signaling. All forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide an update on the beam index in the forwarding resources. In some embodiments, if a new field is added in the RRC signaling and is common for all forwarding resources in the list, the MAC CE can also optionally provide an update on the beam information of the backhaul link in the forwarding resources to allow flexibility. Option 3: In the present disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list may include one or more forwarding resources. MAC-CE signaling can be used to activate / deactivate one of all configured lists in RRC. All forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide an update on the beam index in the forwarding resources. In such a case, a new field can be added in MAC-CE signaling to indicate beam information for the backhaul link, and this indicated backhaul link beam information can be common for all forwarding resources in the activated list. Option 4: In this disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list may include one or more forwarding resources. MAC-CE signaling can be used to activate / deactivate one of all configured lists in the RRC signaling. All forwarding resources in the list can be selected. This MAC-CE signaling can also optionally provide an update on the beam index in the forwarding resources. In such a case, one or more fields can be added in the MAC-CE signaling to indicate beam information for the backhaul link, and the indicated backhaul link beam information can be sequentially one-to-one mapped to the forwarding resources in the activated list. The number of fields added in the MAC-CE can be the same as the number of forwarding resources in the activated list. Option 5: In the present disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling can be used with one or more fields for indicating beam information, each field referring to one beam index, and with one or more fields for indicating time resources defined by RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with one-to-one mapping. In such a method, one or more fields can be added in DCI signaling to indicate beam information for the backhaul link, and this indicated backhaul link beam information can be sequentially associated with the access link beam information in DCI signaling. Option 6: In the present disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling is used with one or more fields for indicating beam information, where each field may refer to one beam index, and can be used with one or more fields for indicating time resources defined by RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with a one-to-one mapping. In such a method, a new field can be added in DCI signaling to indicate beam information for a backhaul link, and this indicated backhaul link beam information can be common for all indicated access link beams in the DCI signaling. Option 7: In this disclosure, for aperiodic access link beam indication, a list of time resources can be predefined by RRC signaling. New DCI signaling can be used with one or more fields to indicate beam information. Each field references one beam index, and one or more fields can indicate the time resource defined by the RRC signaling. Furthermore, one or more beam information fields and one or more time resource fields are sequentially associated with a one-to-one mapping. In such a method, a new field can be added in the corresponding RRC signaling to indicate backhaul link beam information, and this indicated backhaul link beam information can be applicable for all indicated access link beam and time resource information in the DCI signaling.

[0078] Case 3: Beam information for the backhaul link can be configured in signaling separate from the access link beam indication, and the backhaul link beam can be updated within the access link beam indication signaling. As described in Case 1 of Implementation Example 5, beam information for the backhaul link can be indicated to the NCR via signaling different from the access link beam indication, and all options listed in Case 1 can be considered. In such a case, to enable flexibility and dynamism, the following alternatives can be considered: Alternative 1: For periodic access link beam indication and / or semi-persistent access link beam indication, a new field can be added in the transfer resource of the RRC signaling, which may mean that each transfer resource is defined as {beam index for access link, beam information for backhaul link, time resource}. This field may be optional. If the NCR wants to update the backhaul link beam for some transfer resources, this field can be configured in the transfer resource. If not configured, the backhaul beam associated with the indicated access link beam may refer to the beam information of the backhaul link indicated in separate signaling as described in Case 1 of Implementation Example 5. · Alternative 2: For semi-persistent access link beam indication, MAC CE signaling can optionally update backhaul link beam information for some forwarding resources in the list to be activated.

[0079] Case 4: To terminate UL forwarding operation, the UL receiving beam used for the access link and the UL transmitting beam used for the backhaul link can be determined for NCR. For DL ​​forwarding operation, the DL receiving beam for the backhaul link and the DL transmitting beam for the access link can be determined for NCR. In such a way, the beam used for the access link and the beam used for the backhaul link can be configured together as a beam pair in NCR for forwarding operation.

[0080] Considering that there are multiple beams for the access link and the backhaul link, one or more beam pair lists can be configured for the NCR, where each beam pair list includes one or more beam pairs and each beam pair includes a beam index for the access link and beam information (e.g., beam index or TCI status) for the backhaul link. In some embodiments, each beam pair list can have a list index. In some examples, each beam pair in a beam pair list may have a beam pair index. The beam pair list can be indicated from the BS to the NCR via at least one of RRC signaling, MAC CE signaling, or DCI signaling, or can be configured in the NCR and the BS via OAM.

[0081] In another embodiment, because self-interference may occur for NCR-Fwd, a configured beam pair list can be configured for NCR to indicate that these beam pairs are used for self-interference measurements. In another embodiment, this beam pair list can be configured for NCR to indicate that these beam pairs may not cause self-interference problems.

[0082] The following aspects may be considered regarding beam information indication for backhaul links and access links when one or more beam pair lists are configured in NCR.

[0083] Aspect 1: Format of the configured beam pair list. For each beam pair list, it may include one or more beam pairs. For each beam pair, it may include a beam index used to represent the access link beam and beam information that may be used to indicate the beam for the backhaul link. Option 1: The access link beams in different beam pairs can be the same or different, and the backhaul beam information in different beam pairs can also be the same or different, which means there is no limitation on the configured beam pair list. The following example is given to get a clear illustration on the format of the beam pair list. Example 1: Assume there are eight beams indexed from 0 to 7 for access links and four beams indexed from 0 to 3 for backhaul links. A beam pair list can be configured for NCR (e.g., Table 1). As shown in Table 1, for beam pair indexes 0 and 1, they both include access link beam 1 but different backhaul link beams (e.g., backhaul link beam 1 and backhaul link beam 2). On the other hand, for beam pair indexes 0 and 2, they both include backhaul beam 1 but different access link beams (e.g., access link beam 1 and access link beam 3). [Table 1] Example 2: Assume there are eight beams indexed from 0 to 7 for the access link and four beams indexed from 0 to 3 for the backhaul link. A beam pair list can be constructed for NCR (e.g., Table 2). As shown in Table 2, different beam pairs have different access link beams and different backhaul link beams. [Table 2] Option 2: For each beam pair, this may include different access link beams, while the backhaul link beams in each beam pair may be the same or different, which means that each access link beam of the NCR may be linked to one backhaul beam in the configured beam pair list. Example 1: Assume there are five beams indexed from 0 to 4 for the access link and four beams indexed from 0 to 3 for the backhaul link. A beam pair list can be constructed for NCR (e.g., Table 3). As shown in Table 3, different access link beams can be included in different beam pairs of the list, while the backhaul link beams in each beam pair can be the same or different. [Table 3]

[0084] Aspect 2: Method for Backhaul Link Beam Indication When a beam pair list is configured for NCR as described in aspect 1 of implementation example 5, the following options can be considered for beam indication of the access link and backhaul link of the NCR: Option 1: Since a beam pair includes beam information for the backhaul link and beam information for the access link, the beam pair index can be used for beam information indication. In such a method, the access link beam information field can be reinterpreted as a beam pair index. Specifically, for periodic and semi-persistent beam indication for the access link, the beam information field in the transfer resource of the current RRC signaling can be reinterpreted as a beam pair index. For aperiodic beam indication for the access link, the beam information field in the corresponding DCI signaling can be reinterpreted as a beam pair index. In some embodiments, a higher layer parameter can be configured from the BS to the NCR to determine the meaning of the beam information field in the access link beam signaling, so as to inform the NCR whether the corresponding beam information field represents an access link beam index or a beam pair index. For example, a bit field can be defined where a bit value of 1 may represent that the current beam information field in the access link beam signaling is for the access link beam index, and a bit value of 0 may represent that the current beam information field in the access link beam signaling is for the beam pair index (or vice versa). In other embodiments, if this higher layer parameter is configured, this may mean that the current beam information field in the access link beam signaling is for the beam pair index. If not configured, this may mean that the current beam information field in the access link beam signaling is still for the access link beam index. In the present disclosure, for semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list may include one or more forwarding resources.MAC-CE signaling can be used to activate / deactivate one of all configured lists in RRC signaling. All forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide an update on the access link beam index in the forwarding resources. In some embodiments, if the current beam information field in the forwarding resources of the RRC signaling is used for the beam pair index, the MAC CE can also optionally provide an update on the backhaul link beam information for some forwarding resources in the activated RRC list to allow flexibility. Option 2: The beam information field for the access link in the periodic access link beam indication, semi-persistent access link beam indication, and aperiodic access link beam indication signaling can be reused. Once the NCR receives the access link beam indication, the NCR can check the beam pair list based on the indicated access link beam index and obtain the corresponding backhaul link beam information. The following two alternatives can be considered: -Alternative 2.1: A beam pair list can be configured in the NCR, and for each beam pair, it contains different access link beams, while the backhaul link beams in each beam pair can be the same or different, which may mean that each access link beam in the NCR can be linked to only one backhaul beam in the configured beam pair list. Below is an example of a configured beam pair list. Example 1: Assume that the access link includes five beams indexed from 0 to 4, and the backhaul link includes four beams indexed from 0 to 3. In this case, when the NCR receives an access link beam indication, it can query the beam pair list to obtain one corresponding backhaul link beam that can be associated with and used for each indicated access link beam index. For example, according to Table 4, when the NCR receives two access link beam indexes 0 and 1, it can obtain that backhaul beam 0 can be associated with access link beam 0 and backhaul beam 2 can be associated with access link beam 1 and used. For semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources. Each list can include one or more forwarding resources. MAC CE signaling can be used to activate / deactivate one of all configured lists in the RRC signaling. All forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide updates regarding the access beam index in the forwarding resources. In some embodiments, if the current beam information field in the forwarding resources of the RRC signaling is still used for the access link beam, the backhaul link can be obtained from the beam pair list according to the indicated access link beam. The MAC-CE signaling can also optionally provide updates regarding the beam information of the backhaul link for some forwarding resources to allow flexibility. [Table 4] Alternative 2.2: A beam pair list is configured in NCR, and the access link beams in different beam pairs may be the same or different. The backhaul beam information in different beam pairs may also be the same or different. The following is an example of a configured beam pair list: Example 1: Assume that the access link has five beams indexed from 0 to 4, and the backhaul link has four beams indexed from 0 to 3. [Table 5]

[0085] In this case, when the NCR receives an access link beam indication, it can query the beam pair list to obtain one or more backhaul link beams to be used in association with each indicated access link beam index. If only one backhaul beam is associated with the access link beam index, the NCR can use the access link beam and the corresponding backhaul link beam and terminate the forwarding operation. If more than one backhaul link beam is associated with the indicated access link beam index, the NCR can determine its action according to whether it supports simultaneous transmission on these backhaul link beams. If simultaneous transmission is supported, the NCR can use all these backhaul link beams and simultaneously terminate the forwarding operation in the indicated time and / or frequency domain resources associated with the indicated access link beam. If not supported, the NCR can determine the backhaul link beam to be associated with the access link beam based on a predefined rule (e.g., select the backhaul link beam corresponding to the first defined access link beam index in the beam pair list). For example, according to Table 5, when the NCR receives access beam index 4, it can query the beam pair list and obtain two backhaul link beams with indexes 1 and 2. In this case, if the NCR supports simultaneous transmission on backhaul link beams 1 and 2, it can simultaneously use these two backhaul beams along with access link beam 4 and complete the forwarding operation. If the NCR does not support simultaneous transmission on backhaul link beams 1 and 2, it can select backhaul link beam 1 based on a predefined rule, for example, the initially defined access link beam 4 is beam pair 4, and the backhaul link beam in beam pair 4 is backhaul link beam 1.

[0086] For semi-persistent access link beam indication, RRC signaling can be used to configure one or more lists of forwarding resources, each consisting of one or more forwarding resources. MAC-CE signaling can also be used to activate / deactivate one of all configured lists in RRC, so that all forwarding resources in this list can be selected. This MAC-CE signaling can also optionally provide an update on the access beam index in the forwarding resources. Thus, in some embodiments, if the current beam information field in the forwarding resources of the RRC signaling is still used for the access link beam, the backhaul link can be obtained from the beam pair list according to the indicated access link beam. Then, the MAC CE can also optionally provide an update on the backhaul link beam information for some forwarding resources to allow flexibility. Option 3: As introduced in Case 1 of Implementation Example 5, new dedicated signaling can be defined to indicate beam information for the backhaul link, and all options listed in Case 1 of Implementation Example 5 can be considered for the new signaling. In some embodiments, if there is no dedicated signaling to indicate a backhaul link beam, or there is no valid indicated backhaul link beam information, or there is no activated backhaul link beam, the NCR can query a configured beam pair list according to the indicated access link beam index to obtain the corresponding backhaul link beam. The beam pair list can be configured in the NCR, and the access link beams in different beam pairs can be the same or different. The backhaul beam information in different beam pairs can also be the same or different. In such a method, when the NCR receives an access link beam indication, it can query the beam pair list to obtain one or more backhaul link beams that can be used in association with each indicated access link beam index. If only one backhaul beam is associated with the access link beam index, the NCR may terminate the forwarding operation using the access link beam and the corresponding backhaul link beam. If more than one backhaul link beam is associated with the indicated access link beam index, the NCR may determine its action according to whether it supports simultaneous transmission on these backhaul link beams. If simultaneous transmission is supported, the NCR may use all these backhaul link beams and simultaneously terminate the forwarding operation in the indicated time and / or frequency domain resources associated with the indicated access link beam.If not supported, the NCR may determine the backhaul link beam to be associated with the access link beam based on a predefined rule (e.g., select the backhaul link beam corresponding to the first defined access link beam index in the beam pair list). Option 4: As introduced in Case 2 of Implementation Example 5, a new field can be added in the current access link beam indication signaling to indicate beam information for the backhaul link, and all options listed in Case 2 of Implementation Example 5 can be considered for the new field. In some embodiments, this new added field is optional, and if there is no explicitly indicated backhaul link beam for the indicated access link beam, the NCR can query a configured beam pair list according to the indicated access link beam index to obtain the corresponding backhaul link beam. The beam pair list can be configured in the NCR, and the access link beams in different beam pairs can be the same or different. The backhaul beam information in different beam pairs can also be the same or different. In such a method, when the NCR receives an access link beam indication, it can query the beam pair list to obtain one or more backhaul link beams that can be used in association with each indicated access link beam index. If only one backhaul beam is associated with the access link beam index, the NCR may terminate the forwarding operation using the access link beam and the corresponding backhaul link beam. If more than one backhaul link beam is associated with the indicated access link beam index, the NCR may determine its action according to whether it supports simultaneous transmission on these backhaul link beams. If simultaneous transmission is supported, the NCR may use all these backhaul link beams and simultaneously terminate the forwarding operation in the indicated time and / or frequency domain resources associated with the indicated access link beam.If not supported, the NCR may determine the backhaul link beam to be associated with the access link beam based on a predefined rule (e.g., select the backhaul link beam corresponding to the first defined access link beam index in the beam pair list or the last defined access link beam index in the beam pair list).

[0087] As mentioned in the above options of Case 1, Case 2, Case 3, and Case 4 of Implementation Example 5, MAC CE signaling can be used to update backhaul link beam information for some transmission resources in the RRC list to be activated. In that method, the following options can be considered regarding the format of MAC CE signaling for updating the backhaul link beam information: Option 1: One or more fields can be added in the MAC CE signaling to indicate a forwarding resource index, and one or more fields can be added in the MAC CE signaling to indicate updated backhaul link beam information. The one or more fields for the forwarding resource index and the one or more fields for the updated backhaul link beam information are sequentially associated with a 1-to-N (N≧1) mapping or an N-to-1 (N≧1) mapping. For example, there are five forwarding resources in the activated RRC list, and backhaul link beam information applicable to all forwarding resources is configured in the NCR. The BS also desires to update the backhaul link beam information for forwarding resource 1 and forwarding resource 2. In this case, there are two fields added in the MAC CE signaling to indicate forwarding resource index 1 and forwarding resource index 2, and two fields added in the MAC CE signaling to update the backhaul link beam for these two forwarding resources, respectively, which means that the fields for forwarding resource indexes and the field for the updated backhaul link beam are one-to-one mapping. For another example, if the updated backhaul link beam is identical for these two forwarding resources, two fields are added in the MAC CE signaling to indicate forwarding resource index 1 and forwarding resource index 2, and one field is added in the MAC CE signaling to update the backhaul link beam that is applicable for these two forwarding resources, which means that the fields for forwarding resources and the field for the updated backhaul link beam are N-to-1 (N>1) mapping.In some embodiments, a new field is added in the MAC CE signaling to indicate whether there is updated backhaul link beam information in this MAC CE signaling. Option 2: A bitmap can be indicated in MAC CE signaling to indicate one or more transfer resources required to update the backhaul link beam information, where each bit in the bitmap corresponds to a transfer resource and the bit value indicates whether the corresponding transfer resource needs to update the backhaul link beam information. Also, if there are one or more transfer resources whose backhaul link beam information needs to be updated, one or more fields can be added in MAC CE signaling to indicate the updated backhaul link beam information for the corresponding transfer resource. For example, a bit value of 1 indicates that the corresponding transfer resource needs to update the backhaul link beam information, while a bit value of 0 indicates that the corresponding transfer resource does not need to update the backhaul link beam information, or vice versa. For example, if the RRC list to be activated includes three transfer resources, a bitmap 110 including three bits may be used in MAC CE signaling, where the least significant bit in the bitmap corresponds to the first transfer resource in the RRC list to be activated, the second bit represents the second transfer resource in the RRC list to be activated, and the most significant bit in the bitmap represents the last transfer resource in the RRC list to be activated. Thus, if a bit value of 1 indicates that the corresponding transfer resource needs to update its backhaul link beam information, this may mean that the second and last transfer resources need to update their backhaul link beam information, and then two fields are indicated in MAC CE signaling to indicate the updated backhaul link beam information for the second and last transfer resources, respectively. For another example, if the most significant bit in the bitmap represents the first transfer resource in the RRC list to be activated and the second bit represents the second transfer resource, then the least significant bit represents the last transfer resource.Thus, this may mean that the first and second forwarding resources in the activated RRC list are needed to update the backhaul link beam information, and two fields may also be indicated in the MAC CE signaling to update the backhaul link beam information for the first and second forwarding resources, respectively. In some embodiments, a new field may be added in the MAC CE signaling to indicate whether there is updated backhaul link beam information in this MAC CE signaling.

[0088] It should be understood that one or more features from the above implementation examples are not exclusive to a particular implementation example and may be combined in any manner (e.g., in any priority and / or order, in parallel, or otherwise).

[0089] 6 illustrates a flow diagram of a method 600 for resource information indication. Method 600 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGS. 1-2. In overview, method 600 may, in some embodiments, be performed by a network node. Additional, fewer, or different operations may be performed in method 600, depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or computer-readable medium.

[0090] The network node may receive, from the wireless communication node, resource information used for at least one of a first forward link, a second forward link, a third forward link, or a fourth forward link. The first forward link may be from the wireless communication node to the network node. The second forward link may be from the network node to the wireless communication node. The third forward link may be from the network node to the wireless communication device. The fourth forward link may be from the wireless communication device to the network node. The resource information may include at least one of beam information or additional information for the access link. The additional information may comprise at least one of frequency information for the access link, panel information for the access link, link level on / off information, beam information for the backhaul link, frequency information for the backhaul link, panel information for the backhaul link, or uplink (UL) / downlink (DL) information. The backhaul link may include the first forward link and the second forward link. The access link may include the third forward link and the fourth forward link.

[0091] In some embodiments, prior to the network node receiving the resource information, the wireless communication node may have received capability information of the network node. The capability information may be transmitted to the wireless communication node from an operations, administration, and maintenance (OAM) entity. The capability information may be reported from the network node to the wireless communication node. The capability information may include at least one of frequency information allocation for the access link and / or the backhaul link, simultaneous beam operation capability for the access link and / or the backhaul link, frequency shift capability, or sub-band non-overlapping full duplex (SBFD) capability.

[0092] In some embodiments, the frequency information includes at least one of the following formats: carrier index, passband index, bandwidth portion (BWP) index, subband index, cell identifier (ID), starting physical resource block (PRB), starting resource element (RE), ending PRB, ending RE, number of consecutive PRBs, number of REs, RB offset, RE offset, absolute radio frequency channel number (ARFCN), or global synchronization raster channel number (GCSN). The panel information includes at least one of the following formats: panel identification or index or antenna group ID or index. The link level on / off information can be used to indicate an on / off status applicable for at least one of the first forward link, the second forward link, the third forward link, or the fourth forward link. The beam information for the backhaul link can be in one of the following formats: beam index or transmission configuration indication (TCI) status.

[0093] In some embodiments, when beam information for a backhaul link is in the format of a TCI state, a list including one or more TCI states can be configured for the network node to be used for backhaul link beam information indication. The list can be configured for the network node by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. A set of logical reference signals used in the TCI states can be defined for the network node. The set of logical reference signals can be a one-to-one mapping to physical backhaul link beams. A new type of TCI state may include a logical beam index defined for the network node, and the logical beam index can be a one-to-one mapping to physical backhaul link beams. At least one of the additional information can be indicated in the same radio resource control (RRC) signaling used for periodic beam information indication of the access link. The format of the indication for each type of additional information is one of the following: the additional information is indicated in a pair with the beam index for the access link configured in the list by RRC signaling, and each access link beam has corresponding additional information associated with it; and one field is added to indicate the additional information, which is applicable for all access link beams configured in the list by RRC signaling.

[0094] In some embodiments, at least one of the additional information can be indicated in the same RRC signaling used for the semi-persistent beam information indication of the access link. The format of the indication for each type of additional information can be one of: the additional information is indicated in a pair with the beam index for the access link configured in the list by radio resource control (RRC) signaling, or one field is added to indicate the additional information and is applicable for all beam indexes for the access link configured in the list by RRC signaling. At least one of the additional information can be indicated in the same medium access control control element (MAC CE) signaling used for the semi-persistent beam indication of the access link. The format of the indication for each type of additional information may be one of: one or more fields are added in the MAC CE signaling to indicate the one or more additional information, and the one or more additional information is a one-to-one mapping to the indicated beam index information of the access link activated in the MAC CE signaling; or one field is added to indicate the additional information, and is applicable for all beam index information of the access link activated in the MAC CE signaling.

[0095] In some embodiments, at least one of the additional information can be indicated in the same radio resource control (RRC) signaling and medium access control (MAC CE) signaling used for semi-persistent beam indication of the access link. The indication format for each type of additional information may include one field added in the RRC signaling to indicate the additional information and applicable for all beam indices for the access link configured in the list by the RRC signaling, and one or more fields added in the MAC CE signaling to update the one or more additional information used for the particular indicated access link beam information. At least one of the additional information can be indicated in the same downlink control information (DCI) signaling used for aperiodic beam indication of the access link. The format of the indication for each type of additional information may be one of: one or more fields are added in the DCI signaling to indicate one or more pieces of additional information, which is a one-to-one mapping to the indicated beam index information of the access link; or one field is added in the DCI signaling to indicate the additional information, which is applicable for all indicated beam index information of the access link.

[0096] In some embodiments, at least one of the additional information can be indicated in new signaling. The new signaling may comprise at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. The beam information for the access link can be implicitly indicated by a specific beam index for the access link. The link level on / off information can be implicitly indicated by a specific beam index for the access link. The link level on / off information can be implicitly indicated by a time division duplex (TDD) configuration.

[0097] In some embodiments, when the backhaul link beam information is in the format of a transmission configuration indication (TCI) state, medium access control control element (MAC CE) signaling used to activate or deactivate one TCI state for the backhaul link from a radio resource control (RRC)-configured TCI state list of the control link is reused to indicate one or more TCI states to be activated or deactivated from an RRC-configured TCI state list for the backhaul link, the control links including a first control link from the wireless communication node to the network node and a second control link from the network node to the wireless communication node. An upper layer parameter can be defined for the network node to distinguish whether the indicated TCI state in the MAC CE signaling is from the RRC-configured TCI state list of the backhaul link or the RRC-configured beam of the control link. The backhaul link beam information can be indicated in new signaling comprising at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. When a wireless communication node updates backhaul link beam information for one or more indicated access link beams, the RRC signaling used for periodic and / or semi-persistent access link beam indication can be used to update the backhaul link beam information for one or more indicated access link beam indexes. A field for the backhaul link beam indication can be indicated in a pair with a field for the beam index for the access link configured in the list by the RRC signaling. When the field for the backhaul link beam indication is not indicated in the RRC signaling for periodic access link beam indication, the backhaul link beam information associated with the corresponding access link beam can refer to the backhaul link beam information indicated in the new signaling.When a wireless communication node updates backhaul link beam information for one or more indicated access link beams of a semi-persistent access link beam indication, the MAC CE signaling used for the semi-persistent access link beam indication can be used to update the backhaul link beam information for one or more indicated access link beam indexes. One or more fields for the backhaul link beam indication can be added in the MAC CE signaling to update the corresponding backhaul link beam information for one or more indicated access link beams activated in the MAC CE signaling. When the backhaul link beam indication for an access link beam is not updated in the MAC CE signaling for the semi-persistent access link beam indication, the backhaul link beam information associated with the corresponding access link beam can refer to the backhaul link beam information indicated in the new signaling.

[0098] In some embodiments, a network node may receive a list from a wireless communication node including one or more beam pairs, each beam pair including a first beam index configured for an access link and second beam information configured for a backhaul link. Each beam pair in the list may have a corresponding beam pair index. The list may be configured from the wireless communication node to the network node via at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling. The list may be configured to the network node via an operation, administration, and maintenance (OAM) entity. The access link beam information in different beam pairs in the list may be the same or different. The backhaul link beam information in different beam pairs in the list may be the same or different. In an embodiment, the access link beam information in different beam pairs in the list may be different, and the backhaul link beam information in different beam pairs in the list may be the same or different.

[0099] In some embodiments, the access link beam information field can be reinterpreted to be used to indicate a beam pair index. A higher layer parameter can be configured for the network node to indicate whether the access link beam information field is used to indicate a beam pair index or an access link beam index. The backhaul link beam information can be obtained directly from the beam pair list according to the indicated access link beam index. When more than one backhaul link beam is obtained for the associated indicated access link beam and the network node supports simultaneous beam transmission on the backhaul link beam, the network node may simultaneously use the backhaul link beam with the associated access link beam. When more than one backhaul link beam is obtained for the associated indicated access link beam and the network node does not support simultaneous beam transmission on the backhaul link beam, a predefined rule can be defined for the network node to determine the backhaul link beam information for the associated access link beam. The predefined rule may include at least one of a backhaul link beam corresponding to an associated access link beam defined first in the beam pair list, a backhaul link beam corresponding to an associated access link beam defined last in the beam pair list, or a default backhaul link beam. One or more fields can be added in Medium Access Control Element (MAC CE) signaling of semi-persistent access link beam information to update the backhaul link beam information with respect to the indicated access link beam information activated in the MAC CE signaling.

[0100] While various embodiments of the present solution have been described above, it should be understood that they are presented by way of example only, and not by way of limitation. Similarly, various diagrams may depict example architectures or configurations, which are provided to enable those skilled in the art to understand example features and functionality of the present solution. However, such skilled artisans will understand that the present solution is not limited to the example architectures or configurations shown, but may be implemented using a variety of alternative architectures and configurations. Additionally, as will be understood by those skilled in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the scope and scope of the present disclosure should not be limited by any of the example embodiments described above.

[0101] It should also be understood that any reference to elements herein using a designation such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some manner.

[0102] Additionally, those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0103] Those skilled in the art will further understand that any of the various illustrative logic blocks, modules, processors, means, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of the two), firmware, various forms of programs or design code incorporating instructions (which may be referred to herein for convenience as “software” or “software modules”), or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these techniques, depends on the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.

[0104] Furthermore, those skilled in the art will understand that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented in or by integrated circuits (ICs), which may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, or any combination thereof. The logic blocks, modules, and circuits may further include antennas and / or transceivers to communicate with various components within a network or device. A general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration for performing the functions described herein.

[0105] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media, including any medium that can enable a computer program or code to be transferred from one place to another. A storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0106] As used herein, the term "module" refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purposes of discussion, various modules are described as discrete modules; however, as would be apparent to one skilled in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.

[0107] Additionally, memory or other storage and communication components may be employed in embodiments of the solution. It should be understood that, for purposes of clarity, the above description describes embodiments of the solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements, or domains may be used without departing from the solution. For example, functionality illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. References to specific functional units are therefore merely references to suitable means for providing the described functionality, rather than to a strict logical or physical structure or organization.

[0108] Various modifications of the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the following claims.

Claims

1. 1. A wireless communication method, comprising: receiving, by the network node, from the wireless communication node, resource information to be used for at least one of the first forwarding link, the second forwarding link, the third forwarding link, or the fourth forwarding link; Including, 1. A wireless communication method, wherein the first forwarding link is from the wireless communication node to the network node, the second forwarding link is from the network node to the wireless communication node, the third forwarding link is from the network node to a wireless communication device, and the fourth forwarding link is from the wireless communication device to the network node.

2. The resource information includes: Beam information for the access link, or Additional information, the additional information comprising: frequency information for the access link; Panel information for said access link; Link level on / off information, beam information for the backhaul link; frequency information for the backhaul link; Panel information for the backhaul link; or Uplink (UL) / Downlink (DL) information, additional information comprising at least one of: and the backhaul link includes the first forwarding link and the second forwarding link, and the access link includes the third forwarding link and the fourth forwarding link; The wireless communication method according to claim 1 .

3. The wireless communication method according to claim 1 , wherein the wireless communication node receives capability information of the network node prior to the network node receiving the resource information.

4. The wireless communication method of claim 3 , wherein the capability information is transmitted to the wireless communication node from an operation, administration, and maintenance (OAM) entity.

5. The wireless communication method according to claim 3 , wherein the capability information is reported from the network node to the wireless communication node.

6. The capability information is Frequency information allocation for access links and / or backhaul links; simultaneous beam operation capability for the access link and / or the backhaul link; Frequency shift capability, or Sub-band non-overlapping full duplex (SBFD) capability The wireless communication method of claim 3 , comprising at least one of:

7. 3. The wireless communication method of claim 2, wherein the frequency information includes at least one of the following formats: carrier index, passband index, bandwidth portion (BWP) index, subband index, cell identifier (ID), starting physical resource block (PRB), starting resource element (RE), ending PRB, ending RE, number of consecutive PRBs, number of REs, RB offset, RE offset, absolute radio frequency channel number (ARFCN), or global synchronization raster channel number (GCSN).

8. The wireless communication method of claim 2 , wherein the panel information includes at least one of the following formats: a panel identification or index, or an antenna group ID or index.

9. 3. The wireless communication method of claim 2, wherein the link level on / off information is used to indicate an on / off status applicable for at least one of the first forwarding link, the second forwarding link, the third forwarding link, or the fourth forwarding link.

10. 3. The wireless communication method of claim 2, wherein the beam information for the backhaul link is in one of the following formats: beam index or transmission configuration indication (TCI) state.

11. 11. The wireless communication method of claim 10, wherein when the beam information for the backhaul link is in the format of the TCI state, a list including one or more TCI states is configured for the network node to be used for backhaul link beam information indication.

12. 12. The wireless communication method of claim 11, wherein the list is configured by the wireless communication node to the network node via at least one of Radio Resource Control (RRC) signaling, Medium Access Control Control Element (MAC CE) signaling, or Downlink Control Information (DCI) signaling.

13. 12. The wireless communication method of claim 11, wherein a set of logical reference signals used in a TCI state is defined for the network node, the set of logical reference signals being a one-to-one mapping to physical backhaul link beams.

14. 12. The wireless communication method of claim 11, wherein a new type of TCI state includes a logical beam index defined for the network node, the logical beam index being a one-to-one mapping to a physical backhaul link beam.

15. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in the same Radio Resource Control (RRC) signaling used for periodic beam information indication of the access link.

16. The format for the indication of each type of additional information is: The additional information is indicated in pairs with a beam index for the access link configured in a list by RRC signaling, each access link beam having corresponding additional information associated therewith; or One field is added to indicate the additional information, which is applicable for all access link beams configured in the list by RRC signaling.

16. The wireless communication method of claim 15, wherein the method is one of:

17. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in the same RRC signaling used for semi-persistent beam information indication of the access link.

18. The format for the indication of each type of additional information is: The additional information is indicated in a pair with a beam index for the access link configured in a list by Radio Resource Control (RRC) signaling, or One field is added to indicate the additional information, which is applicable for all beam indexes for the access link configured in the list by the RRC signaling.

18. The wireless communication method of claim 17, wherein the method is one of:

19. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in the same Medium Access Control Control Element (MAC CE) signaling used for semi-persistent beam indication of the access link.

20. The format for the indication of each type of additional information is: One or more fields are added in the MAC CE signaling to indicate one or more additional information, and the one or more additional information is a one-to-one mapping to the indicated beam index information of the access link activated in the MAC CE signaling; or One field is added to indicate the additional information and is applicable for all beam index information of the access link activated in the MAC CE signaling.

20. The wireless communication method of claim 19, wherein the method is one of:

21. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in the same Radio Resource Control (RRC) signaling and Medium Access Control Control Element (MAC CE) signaling used for semi-persistent beam indication of the access link.

22. The format for the indication of each type of additional information is: one field is added in the RRC signaling to indicate the additional information, and is applicable for all beam indexes for the access link configured in a list by the RRC signaling; One or more fields are added in the MAC CE signaling to update one or more additional information used for specific indicated access link beam information.

22. The wireless communication method of claim 21, comprising:

23. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in the same downlink control information (DCI) signaling used for aperiodic beam indication of the access link.

24. The format for the indication of each type of additional information is: One or more fields are added in the DCI signaling to indicate the one or more additional information, which is a one-to-one mapping to the indicated beam index information of the access link; or One field is added in the DCI signaling to indicate the additional information, and is applicable for all indicated beam index information of the access link.

24. The wireless communication method of claim 23, wherein the method is one of:

25. 3. The wireless communication method of claim 2, wherein at least one of the additional information is indicated in new signaling comprising at least one of Radio Resource Control (RRC) signaling, Medium Access Control Control Element (MAC CE) signaling, or Downlink Control Information (DCI) signaling.

26. The wireless communication method of claim 2 , wherein the panel information for the access link is implicitly indicated by a particular beam index for the access link.

27. The wireless communication method of claim 2 , wherein the link level on / off information is implicitly indicated by a particular beam index for the access link.

28. The wireless communication method of claim 2 , wherein the link level on / off information is implicitly indicated by a time division duplex (TDD) configuration.

29. 12. The wireless communication method of claim 2 or 11, wherein when the backhaul link beam information is in a format of a transmission configuration indication (TCI) state, medium access control control element (MAC CE) signaling used to activate or deactivate one TCI state for the backhaul link from a radio resource control (RRC) configured TCI state list of a control link is reused to indicate one or more TCI states to be activated or deactivated from the RRC configured TCI state list for the backhaul link, the control links including a first control link from the wireless communication node to a network node and a second control link from the network node to the wireless communication node.

30. 30. The wireless communication method of claim 29, wherein a higher layer parameter is defined for the network node to distinguish whether the indicated TCI state in the MAC CE signaling is from an RRC configured TCI state list of the backhaul link or an RRC configured beam of the control link.

31. 3. The wireless communication method of claim 2, wherein the backhaul link beam information is indicated in new signaling comprising at least one of radio resource control (RRC) signaling, medium access control control element (MAC CE) signaling, or downlink control information (DCI) signaling.

32. 32. The wireless communication method of claim 31 , wherein the RRC signaling used for periodic and / or semi-persistent access link beam indication is used to update the backhaul link beam information for one or more indicated access link beam indices.

33. 33. The wireless communication method of claim 32, wherein a field for a backhaul link beam indication is indicated in a pair with a field for a beam index for the access link configured in a list by the RRC signaling.

34. 34. The wireless communication method of claim 31 or 33, wherein when the backhaul link beam indication field is not indicated in the RRC signaling for periodic access link beam indication, the backhaul link beam information associated with the corresponding access link beam refers to the backhaul link beam information indicated in the new signaling.

35. 32. The wireless communication method of claim 31 , wherein the MAC CE signaling used for the semi-persistent access link beam indication is used to update the backhaul link beam information for one or more indicated access link beam indices.

36. 36. The wireless communication method of claim 35, wherein one or more fields for backhaul link beam indication are added in the MAC CE signaling to update the backhaul link beam information for one or more access link beams activated in the MAC CE signaling.

37. 37. The wireless communication method of claim 31 or 36, wherein when the backhaul link beam indication for an access link beam is not updated in the MAC CE signaling for semi-persistent access link beam indication, the backhaul link beam information associated with the corresponding access link beam refers to the backhaul link beam information indicated in the new signaling.

38. receiving, by the network node, from the wireless communication node, a list including one or more beam pairs, each of the beam pairs including a first beam index configured for the access link and second beam information configured for the backhaul link; The wireless communication method of claim 1 , further comprising:

39. 39. The wireless communication method of claim 38, wherein each beam pair in the list has a corresponding beam pair index.

40. 39. The wireless communication method of claim 38, wherein the list is configured from the wireless communication node to the network node via at least one of Radio Resource Control (RRC) signaling, Medium Access Control Control Element (MAC CE) signaling, or Downlink Control Information (DCI) signaling.

41. 39. The wireless communication method of claim 38, wherein the list is configured for the network node via an Operations, Administration, and Maintenance (OAM) entity.

42. The wireless communication method of claim 38, wherein access link beam information in different beam pairs in the list is the same or different, and backhaul link beam information in different beam pairs in the list is the same or different.

43. The wireless communication method of claim 38, wherein access link beam information in different beam pairs in the list is different, and backhaul link beam information in different beam pairs in the list is the same or different.

44. 40. The wireless communication method of claim 39, wherein an access link beam information field is reinterpreted to be used to indicate a beam pair index.

45. 45. The wireless communication method of claim 44, wherein an upper layer parameter is configured for the network node to indicate whether the access link beam information field is used to indicate the beam pair index or the access link beam index.

46. 44. The wireless communication method of claim 42, wherein the backhaul link beam information is obtained directly from the beam pair list according to an indicated access link beam index.

47. 47. The wireless communication method of claim 46, wherein when more than one backhaul link beam is obtained for an associated indicated access link beam and the network node supports simultaneous beam transmission on a backhaul link beam, the network node uses the backhaul link beam simultaneously with the associated access link beam.

48. 47. The wireless communication method of claim 46, wherein when more than one backhaul link beam is obtained for an associated indicated access link beam and the network node does not support simultaneous beam transmission on the backhaul link beam, a predefined rule is defined for the network node to determine the backhaul link beam information for the associated access link beam.

49. The predefined rules include: the backhaul link beam corresponding to the associated access link beam defined first in the beam pair list; the backhaul link beam corresponding to the associated access link beam defined last in the beam pair list; or Default Backhaul Link Beam 49. The wireless communication method of claim 48, comprising at least one of:

50. 47. The wireless communication method of claim 44, wherein one or more fields are added in the Medium Access Control Element (MAC CE) signaling of semi-persistent access link beam information to update the backhaul link beam information with respect to access link beam information activated in MAC CE signaling.

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