Backhaul link management, apparatus, and computer readable medium

Abstract

A wireless communication method is disclosed. A method of wireless communication includes receiving, by a wireless communication node, a forwarding configuration from a base station (BS), the forwarding configuration associated with at least one first cell or at least one first frequency; and applying the forwarding configuration if an MT (Mobile Terminal) portion of the wireless communication node resides on at least one first cell or at least one first frequency.

Description

Technical Field

[0001] The present disclosure generally relates to wireless communication and, more particularly, to wireless communication regarding a backhaul link. Background Art

[0002] Wireless communication technology is a key component of an increasingly interconnected global communication network. Wireless communication relies on precisely allocated time and frequency resources to transmit and receive wireless signals. Repeaters can increase the coverage range of wireless communication signals, but how to manage the backhaul link of repeaters can be improved. Summary of the Invention

[0003] This summary is a brief description of some aspects of the present disclosure. This summary is not intended to limit the scope of the present disclosure.

[0004] According to some embodiments of the present disclosure, a wireless communication method is provided. The method includes a wireless communication node receiving a forwarding configuration from a base station (BS), the forwarding configuration being associated with at least one first cell or at least one first frequency; and applying the forwarding configuration if the MT (mobile terminal) part of the wireless communication node resides on at least one first cell or at least one first frequency.

[0005] According to some embodiments of the present disclosure, another wireless communication method is provided. The method includes establishing a backhaul link between a base station (BS) and a wireless communication node; and the BS sending a forwarding configuration to the wireless communication node, the forwarding configuration being applied by the wireless communication node when the MT (mobile terminal) part of the wireless communication node resides on at least one first cell or at least one first frequency associated with the forwarding configuration.

[0006] According to some embodiments of the present disclosure, another wireless communication method is provided. The method includes establishing a backhaul link between a base station (BS) and a wireless communication node; and controlling the forwarding operation of the forwarding part of the wireless communication node according to at least one of the following factors, the factors including measurement results of a reference signal, the radio link quality of the backhaul link, a timer started in response to the MT (mobile terminal) part of the wireless communication node entering the RRC idle state or the RRC inactive state, or the selection or reselection of the serving cell of the MT part.

[0007] According to some embodiments of the present disclosure, another wireless communication method is provided. The method includes establishing a backhaul link between a base station and a wireless communication node; and receiving a forwarded packet or a wireless signal from a forwarding part of the wireless communication node through a forwarding operation controlled according to at least one of the following factors, the factors including a measurement result of a reference signal, a radio link quality of the backhaul link, a timer started in response to a MT (mobile terminal) part of the wireless communication node entering an RRC idle state or an RRC inactive state, a selection or reselection of a serving cell of the MT part.

[0008] Another embodiment of the present disclosure provides a wireless communication device, including a memory storing one or more programs and a processor, the processor being electrically coupled to the memory and configured to execute the one or more programs to perform any method or step or a combination thereof in the present disclosure.

[0009] Another embodiment of the present disclosure provides a non-transitory computer-readable storage medium storing one or more programs, the one or more programs being configured to, when executed by a processor, cause to perform any method or step or a combination thereof in the present disclosure.

[0010] According to some embodiments of the present disclosure, one or more wireless communication methods are further disclosed, the methods including combinations (in a general view or a specific view) of certain methods, aspects, elements and steps disclosed in various embodiments of the present disclosure.

[0011] The above aspects and other aspects and their implementation manners are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Various exemplary embodiments of the present disclosure are described in detail below with reference to the drawings. The drawings are provided for illustrative purposes only and depict only the exemplary embodiments of the present disclosure to facilitate the understanding of the present disclosure. Therefore, the drawings should not be considered as limiting the breadth, scope or applicability of the present disclosure. It should be noted that, for clarity and ease of illustration, these figures are not necessarily drawn to scale.

[0013] Figure 1 An exemplary wireless communication system with a repeater is shown; and

[0014] Figure 2 Is shown Figure 1 The component structures of different wireless communication nodes in DETAILED DESCRIPTION

[0015] Communication coverage is one of the key aspects of cellular network deployment. Mobile operators rely on different types of network nodes to provide comprehensive coverage in their deployments. Therefore, to increase the flexibility of mobile operator network deployments, new types of network nodes have been considered. For example, Integrated Access and Backhaul (IAB) has been introduced and further enhanced to be used as a new type of network node that does not require a wired backhaul. Another type of network node is the RF (Radio Frequency) repeater, which simply amplifies and forwards the received signal. RF repeaters have been widely deployed to supplement the coverage provided by conventional full-stack cells.

[0016] Network-controlled repeaters have also been introduced as an enhancement to traditional RF repeaters, with the ability to receive and process lateral control information from the network. The lateral control information can enable the network-controlled repeater to perform the amplification and forwarding operations in a more efficient manner. Potential benefits can include reduced unnecessary noise amplification, transmission and reception with better spatial directivity, and simplified network integration. Therefore, network-controlled repeaters are regarded by some industry players as a stepping stone to re-configurable intelligent surfaces (RIS). RIS nodes can adjust the phase and amplitude of the received signal to improve coverage.

[0017] Among other things, the present disclosure generally relates to such network nodes (or smart nodes (SN)), including but not limited to network-controlled repeaters (NCR), intelligent repeaters, RIS, IAB.

[0018] Figure 1An exemplary model of a wireless communication system with an intermediate SN is shown. The SN can include two parts, a mobile termination (MT) part and a forwarding part. The wireless link between the base station (BS) and the forwarding part includes a backhaul link, and the wireless link between the BS and the MT part includes a control link. The wireless link between the SN and the mobile device or UE includes an access link. In the downlink transmission of the backhaul link, the forwarding part forwards the wireless signal received from the BS and forwards it to the mobile device. In the uplink transmission of the backhaul link, the forwarding part forwards the wireless signal received from the mobile device and forwards it to the BS. The forwarding part can process the wireless signal or only amplify the wireless signal. The MT part can be connected to the BS as an ordinary mobile device. In addition, the MT part can receive side control information (forwarding configuration) from the BS. When the SN MT (i.e., the MT part) is in the RRC_CONNECTED state, the control link can include one or more serving cells.

[0019] Figure 2 A block diagram of an exemplary wireless communication system 10 in accordance with some embodiments of the present disclosure is shown. System 10 may perform various methods / steps disclosed in the present disclosure. System 10 may include components and elements configured to support operational features not detailed herein.

[0020] System 10 may include a base station (BS) 110 and a user equipment (UE) 120. The BS 110 includes a BS transceiver or transceiver module 112, a BS antenna system 116, a BS memory or memory module 114, a BS processor or processor module 113, and a network interface 111. The components of the BS 110 may be electrically coupled and communicate with each other via a data communication bus 180 as needed. Similarly, the UE 120 includes a UE transceiver or transceiver module 122, a UE antenna system 126, a UE memory or memory module 124, a UE processor or processor module 123, and an I / O interface 121. The components of the UE 120 may be electrically coupled and communicate with each other via a data communication bus 190 as needed. The SN 130 connected between the BS and the UE includes an SN transceiver or transceiver module 132, an SN antenna system 136, an SN memory or memory module 134, an SN processor or processor module 133, and a network interface 131. The components of the SN 130 may be electrically coupled and communicate with each other via a data communication bus 190 as needed. The BS 110 communicates with the UE 120 via the SN 130 and the communication channel therebetween, which may be any wireless channel or other medium known in the art suitable for data transmission as described herein.

[0021] As understood by those of ordinary skill in the art, system 10 may also include in addition to Figure 2Any number of modules outside the module shown. Those of ordinary skill in the art will understand that the various illustrative blocks, modules, circuits, and processing logics described in connection with the embodiments disclosed herein can 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 generally described in terms of their functions. Whether this function is implemented as hardware, firmware, or software depends on the particular application and the design constraints imposed on the overall system. Persons familiar with the concepts described herein can implement this function in an appropriate manner for each particular application, but these implementation decisions should not be construed as limiting the scope of the present disclosure.

[0022] The processor modules 113, 123, 133 can 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 that is designed to perform the functions described herein. In this way, the processor modules can be implemented as a microprocessor, a controller, a microcontroller, or a state machine, etc. The processor modules can also be implemented as a combination of computing devices, such as a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other such configuration.

[0023] Furthermore, the steps of the methods or algorithms described in connection with the embodiments disclosed herein can be directly embodied in hardware, firmware, software modules executed by the processor modules 113, 123, 133 respectively, or any practical combination thereof. The memory modules 113, 123, 133 can be implemented as RAM memory, flash memory, EEPROM memory, registers, ROM memory, EPROM memory, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. In this regard, the memory modules 114, 124, 134 can be respectively coupled to the processor modules 113, 123, 133 such that the processor modules 113, 123, 133 can respectively read information from and write information to the memory modules 114, 124, 134. The memory modules 114, 124, 134 can also be integrated into their respective processor modules 113, 123, 133. In some embodiments, the memory modules 114, 124, 134 can each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions executed by the processor modules 113, 123, 133 respectively. The memory modules 114, 124, 134 can also each include non-volatile memory for storing the instructions executed by the processor modules 113, 123, 133 respectively.

[0024] When the SN MT (i.e., the MT part of the SN as shown in Figure 1 ) is in the RRC_CONNECTED state, the network can configure a data packet or a wireless signal forwarding configuration (e.g., sidelink control information) such that the SN can forward data packets or wireless signals from the UE to the BS according to the configuration. Due to connection or other problems, the SN MT may transition to the RRC_IDLE state or the RRC_INACTIVE state. In this case, the SN FWD part (i.e., the forwarding part as shown in Figure 1 ) can be in the ON or OFF state after receiving the last forwarding configuration from the network. For example, the SN FWD part can perform forwarding according to the sidelink control information (i.e., the forwarding configuration) received by the SN MT before the SN MT is released to the RRC_IDLE or RRC_INACTIVE state.

[0025] However, when the SN MT is in the RRC_IDLE state or the RRC_INACITVE state, the network cannot know the wireless environment of the SN. After the SN MT transitions to the RRC_IDLE or RRC_INACTIVE state, the forwarding configuration may no longer be suitable for forwarding because the BS cannot update the forwarding configuration of the SN. The results may include the SN forwarding and amplifying unexpected wireless signals. The quality of the wireless signals on the backhaul link may not match the expected quality. In addition, this situation may cause unexpected signal interference.

[0026] According to some embodiments of the present disclosure, a method is provided for determining the state of the SN FWD part when the SN MT is in the RRC_IDLE or RRC_INACTIVE state. The state of the SN FWD part can be determined such that the SN FWD can take appropriate actions, such as stopping forwarding data packets or wireless signals to the BS, or ignoring the outdated forwarding configuration.

[0027] According to some embodiments of the present disclosure, the SN can determine the state of the SN FWD part according to at least one of the following conditions: (1) the measurement result is higher than a first threshold; or (2) the measurement result is higher than the threshold for a period of time. For example, the measurement result can be some measurement results of one or more reference signals. For example, the measurement result can include RSRP (Reference Signal Received Power) or RSRQ (Reference Signal Received Quality) measurement results.

[0028] For example, the measurement result can be a measurement result based on one or more specific cells or one or more specific beams. The measured cell can be the last serving cell of the SN MT before the SN MT transitions to the RRC_IDLE or RRC_INACTIVE state, the current serving cell of the SN MT, or a cell in a cell set. The cell set can be configured by the BS for the SN MT via an RRC message or system information. Alternatively or additionally, the cell set can include cells for which the forwarding configuration applies. The cell set can include cells for which the forwarding configuration is valid. On the other hand, the measured beam may include a beam configured for the downlink transmission of the backhaul link between the SN and the BS. Alternatively or additionally, the measured beam can be a beam in a beam set, which can be configured by the BS via an RRC message or system information.

[0029] The threshold of the measurement result can be configured by the BS via an RRC message or system information. The duration of the measurement can also be configured by the BS via an RRC message or system information. The configuration of measurement parameters such as the threshold and duration, as well as other matters related to the measurement, can be configured by the same RRC message or system information, or by different RRC messages or several pieces of system information. The RRC message can be the RRC message that transitions the SN MT to the RRC_IDLE or RRC_INACTIVE state.

[0030] The measurement can be performed by the SN MT or the SN FWD part according to the measurement configuration. The measurement configuration can be configured via an RRC message or system information. The measurement configuration can include at least one of the following: a set of reference signals for performing the measurement (corresponding to the parameter ssb-ToMeasure), an (absolute) threshold for combining the measurement results of each SSB resource (corresponding to the parameter absThreshSS-BlocksConsolidation), the maximum number of measurement results for each beam of the SSB based on the required average value (corresponding to the parameter nrofSS-BlocksToAverage), the measurement timing configuration (corresponding to the parameter SMTC), or the measurement period.

[0031] According to some examples, the cells or beams can be measured based on the measurement period. The measurement can be performed on the reference signals associated with the beam configured for the downlink transmission of the backhaul link or a beam from a beam set. The measurement can be performed on a set of reference signals associated with the last serving cell of the SN MT before the SN MT transitions to the RRC_IDLE or RRC_INACTIVE state, the current serving cell of the SN MT, or a cell in a cell set.

[0032] If the measurement result is within a predefined range or meets a predefined condition, the SN may continue to forward data packets or radio signals from the UE to the BS. The forwarding may be performed based on a forwarding configuration configured by the BS before the SN MT enters the RRC_IDLE or RRC_INACTIVE state.

[0033] If the measurement result exceeds the predefined range or otherwise does not meet the conditions, the SN may perform at least one of the following actions, including: stopping the forwarding of data packets or radio signals received from the UE by the SN FWD part; stopping the application of the forwarding configuration by the SN FWD or SN MT part; or removing the forwarding configuration by the SN MT. According to some examples, the SN MT may initiate an RRC procedure to establish or resume an RRC connection between the SN and the BS. The RRC procedure may be an RRC connection establishment procedure or an RRC connection resume procedure.

[0034] The BS may configure the SN to determine whether the above actions should be performed and which action or actions should be performed by the SN MT via an RRC message or system information. The BS may instruct the SN MT to stop forwarding by the SN FWD part. When the conditions disclosed above are met, the BS may further instruct the SN MT to initiate an RRC establishment or resume procedure.

[0035] Here, the BS may control the prerequisite for the SN forwarding part to continue forwarding data packets or radio signals. Even when the SNMT is in the RRC_IDLE state or RRC_INACTIVE state, when the BS cannot sense the radio environment, the BS can ensure that the SN forwarding is performed under appropriate cell or beam quality.

[0036] According to some embodiments of the present disclosure, the state of the SN may be determined by the radio link quality of the backhaul beam. For example, when the SN MT is in the RRC_IDLE or RRC_INACTIVE state, the SN may evaluate the quality of a reference signal (RS). The RS whose quality is considered may be at least one of the following: the RS associated with the DL (downlink) beam used for the backhaul link, or the RS associated with the beam configured by the BS via an RRC message.

[0037] In addition, the BS may configure one or more RSs for obtaining the radio link quality. The RS may be configured by indicating a reference signal index of a resource set. The resource set may be configured with frequency and time resources. For example, the resource set may include an SSB configuration or a CSI-RS configuration. The resource set may be within or outside the frequency bandwidth of the initial DL BWP of the serving cell of the SN MT.

[0038] According to some embodiments of the present disclosure, the SN may determine the state of the SN FWD part based on the occurrence of beam failures of certain RSs.

[0039] The beam failure of the RS may be determined based on at least one of a threshold, a maximum count of failures, and / or a timer value. The threshold, maximum count, and timer value may be configured by the BS via an RRC message or system information.

[0040] For example, if a beam failure instance indication of the RS is received from a lower layer of the SN, the count of the beam failure instances is incremented by 1. In response, the SN starts or restarts a timer. When the timer expires at a preset value, the count of the beam failure instances is reset to zero. When the count of the beam failure instances reaches the maximum count (or a preset threshold), a beam failure of the RS may be declared.

[0041] The beam failure instance indication may be indicated from a lower layer of the SN. For example, a lower layer of the SN may evaluate the quality of the RS based on a threshold. The evaluation may be performed periodically.

[0042] If the quality of the RS is worse than the threshold, or if the RS is not the RS with the best quality in the resource - concentrated radio link, a lower layer of the SN may indicate a beam failure instance indication. The lower layer of the SN may be the physical layer of the SN MT or the physical layer of the SN FWD part.

[0043] According to some embodiments of the present disclosure, the SN may determine the state of the SN FWD part based on the determination that the RS is not the RS with the best radio link quality in a resource set for a period of time. The resource set may be configured with frequency positions and time resources. For example, the resource set may include an SSB configuration or a CSI - RS configuration. The resource set may be within or outside the frequency bandwidth of the initial DL BWP of the serving cell of the SN MT. The length of the duration may be configured by the BS via an RRC message or system information.

[0044] The radio link quality of the backhaul link may be evaluated by the physical layer of the SN MT or the physical layer of the SN FWD part. The radio link quality may be evaluated by L1 (layer 1) measurements of the RS. The L1 measurement result may be L1 RSRP or L1 RSRQ.

[0045] According to some embodiments of the present disclosure, when the SN determines that at least one of the following conditions is satisfied, the SN may perform at least one of the following actions, including: stopping the SN FWD part from forwarding data packets and radio signals received from the UE; stopping applying the forwarding configuration by the SN FWD or the SN MT part; removing the forwarding configuration by the SN MT; initiating an RRC procedure to establish or resume an RRC connection between the SN and the BS. The RRC procedure may be an RRC connection establishment procedure or an RRC connection resume procedure. The conditions include that the radio link quality of the backhaul beam is outside a specific range, a beam failure has been declared, or the RS is not the RS with the best radio link quality in the resource set for a period of time.

[0046] The BS may configure the SN to determine whether the above actions should be performed and which action or actions should be performed by the SN MT via an RRC message or system information. The BS may instruct the SN MT to stop forwarding by the SN FWD part. When the conditions disclosed above are met, the BS may also instruct the SN MT to initiate an RRC establishment or resume procedure. When the RRC procedure is started, the BS will establish an RRC connection in response to the SN.

[0047] Here, if the beam of the backhaul link is not within the expected quality, the SN in the RRC_IDLE state or the RRC_INACTIVE state may stop forwarding. The physical layer of the SN may continue to evaluate the beam of the backhaul link. In the case of a beam failure or the beam of the backhaul link not being the best beam in its resource set, the SN may stop forwarding. In addition, the BS may configure the conditions for beam failure evaluation.

[0048] According to some embodiments of the present disclosure, the SN may use a timer to determine the state of the SN FWD part so as to perform corresponding actions based on the timer.

[0049] For example, in response to a transition to the RRC_IDLE state or the RRC_INACTIVE state, the SN may start a timer according to the timer value. The timer value may be configured by the BS via an RRC message or system information. The RRC message may be an RRC message that releases the SN MT to the RRC_IDLE state or the RRC_INACTIVE state.

[0050] When the timer runs after the state transition, the SN FWD part may continue to perform forwarding. Before the SN enters the RRC_IDLE state or the RRC_INACTIVE state, forwarding may be performed according to the forwarding configuration configured by the network or the BS.

[0051] When the SN MT is in the RRC_IDLE state or the RRC_INACTIVE state, the timer will continue to count. When the timer reaches a predefined value or otherwise meets the conditions, the SN FWD part can perform at least one of the following actions, including: stopping the packet or radio signal received from the UE and forwarded by the SN FWD part (which means the SN FWD transitions to the OFF state); stopping the forwarding configuration applied by the SN FWD or SN MT part; removing the forwarding configuration by the SN MT; initiating an RRC procedure to establish or resume the RRC connection between the SN and the BS. The RRC procedure can be an RRC connection establishment procedure or an RRC connection resume procedure.

[0052] The BS can configure the SN to determine whether the above actions should be performed and which one or ones of the actions should be performed by the SN MT via an RRC message or system information. The BS can instruct the SN MT to stop forwarding by the SN FWD part. When the conditions disclosed above are met, the BS can also instruct the SN MT to initiate an RRC establishment or resume procedure. When the RRC procedure is started, the BS will establish an RRC connection in response to the SN.

[0053] Here, the BS can control the allowed time length when SN forwarding is allowed after the SN enters the RRC_IDLE state or the RRC_INACTIVE state. This method provides flexibility in configuring the behavior of SN forwarding.

[0054] According to some embodiments of the present disclosure, when the SN MT is in the RRC_IDLE state or the RRC_INACTIVE state, the SNFWD part can determine its state based on the cell selection or reselection of the SN MT.

[0055] For example, the SN can determine the state of the SN FWD part according to the condition (1) that the serving cell selected or reselected by the SN MT is not the last serving cell before the SN MT transitions to the RRC_IDLE state or the RRC_INACTIVE state.

[0056] Additionally or alternatively, the SN can determine the state of the SN FWD part according to the condition (2) that the serving cell selected or reselected by the SN MT is not in a predefined frequency. For example, this frequency can be the same as the frequency of the last serving cell (i.e., the inter-frequency neighboring cell) before the SN MT transitions to the RRC_IDLE state or the RRC_INACTIVE state. Additionally or alternatively, this frequency can be a frequency configured by the BS. This frequency can be associated with the forwarding configuration configured by the BS. This frequency can be the redirected carrier frequency indicated by the BS when the SN MT is released to the RRC_IDLE state or the RRC_INACTIVE state.

[0057] Additionally or alternatively, the SN may determine the state of the SN FWD part based on the condition (3) that the serving cell selected or reselected by the SN MT is not a suitable cell. For example, a suitable cell satisfies at least one of the following conditions: the cell is part of a selected PLMN or a registered PLMN or a PLMN in an equivalent PLMN list; meets the cell selection criteria; or the cell is not blocked or prohibited for the SN MT. A suitable cell may also be defined according to common knowledge in the art.

[0058] Additionally or alternatively, the SN may determine the state of the SN FWD part based on the condition (4) that the serving cell selected or reselected by the SN MT is not the highest ranked cell or the best cell according to the absolute priority reselection rules specified in the NR specification. Generally and exemplarily, for all in-band or equal-frequency cells that meet the cell selection criteria S, the cells perform cell ranking according to the cell ranking criteria Rs (for serving cells) and Rn (for neighboring cells). According to the cell ranking rules provided above, the highest ranked cell may be the cell ranked first. For example, the best cell may be the cell ranked highest on the highest priority frequency among the cells that meet the cell reselection criteria.

[0059] Additionally or alternatively, the SN may determine the state of the SN FWD part based on the condition (5) that the cell selected or reselected by the SN MT is not the best cell or the highest priority cell.

[0060] Additionally or alternatively, the SN may determine the state of the SN FWD part based on the condition (6) that the serving cell selected or reselected by the SN MT is not one of the configured cells. For example, the configured cells may be configured for the SN MT by the core network via RRC messages or system information. The configured cells may be the cells for which SN forwarding is allowed. The configured cells may be the cells in which the forwarding configuration configured by the BS is valid or applicable. The configured cells may be associated with the forwarding configuration. The configured cells may be the redirected cells configured by the BS when the SN MT is released to the RRC_IDLE state or the RRC_INACTIVE state.

[0061] Additionally or alternatively, the SN may determine the state of the SN FWD part based on the condition (7) that the serving cell selected or reselected by the SN MT is one of the configured cells. The configured cells may be configured for the SN MT by the core network via RRC messages or system information. The configured cells may be the cells for which SN forwarding is not allowed. The configured cells may be the cells in which the forwarding configuration configured by the BS is invalid and / or not applicable. The configured cells may not be associated with the forwarding configuration.

[0062] For example, when the SN MT transitions to the RRC_IDLE or RRC_INACTIVE state, the above cell selection can be performed by the SN MT. When the SN MT is in the RRC_IDLE or RRC_INACTIVE state, cell reselection can be performed by the SN MT.

[0063] According to some embodiments of the present disclosure, when the SN determines that at least one of conditions (1)-(7) is satisfied (or alternatively not satisfied), the SN can perform at least one of the following actions, including: stopping the forwarding of data packets received from the UE by the SN FWD part; stopping the application of the forwarding configuration by the SN FWD or SN MT part; removing the forwarding configuration by the SN MT; initiating an RRC procedure to establish or resume an RRC connection between the SN and the BS. The RRC procedure can be an RRC connection establishment procedure or an RRC connection resume procedure.

[0064] The BS can configure the SN to determine whether the above actions should be performed, and which one or more actions should be performed by the SN MT, via an RRC message or system information. The BS can instruct the SN MT to stop the forwarding by the SN FWD part. When the above disclosed conditions are satisfied, the BS can also instruct the SN MT to initiate an RRC establishment or resume procedure. When the RRC procedure is initiated, the BS will establish an RRC connection in response to the SN.

[0065] Here, the SN forwarding behavior can be determined based on the SN MT performing cell reselection or selecting and camping on a new serving cell. It should be noted that the different ways disclosed for determining the state of the SN FWD part can be used together to form various combinations of different methods selected from the steps disclosed in the present disclosure.

[0066] According to the above various disclosures, the BS can control in which cell or cells the configured forwarding configuration remains valid or applicable. The BS can also configure a list of cells for which the SN forwarding configuration is applicable or valid. Thus, when the SN MT reselects or selects one of these valid and applicable cells, the SN forwarding can continue according to the configured forwarding configuration. The BS can additionally or alternatively configure a list of cells for which the SN forwarding configuration is not applicable or invalid. When the SN MT reselects or selects one of these invalid or inapplicable cells, the SN forwarding is stopped. Thus, the BS can further control the behavior of the SN FWD part and the SN MT during cell reselection or selection.

[0067] According to some embodiments of the present disclosure, the BS may also indicate whether to allow SN MTs in the RRC_IDLE or RRC_INACTIVE state to perform cell reselection. Additionally or alternatively, the BS may indicate whether to allow SN MTs in the RRC_IDLE or RRC_INACTIVE state to perform inter-frequency cell reselection. The BS may indicate such a configuration to the SN MT via an RRC message or system information. Thereby, the SN MT may perform cell reselection according to the indication. Thus, the BS may control whether to allow the SN MT to perform cell reselection. This is beneficial in some deployments where the network operator does not allow the SN to perform cell reselection to another cell due to short-term changes in the radio quality of the serving cell.

[0068] According to some embodiments of the present disclosure, the BS may configure cell selection or reselection configuration for the SN MT. The configuration may be specific to the SN. The cell reselection configuration may be configured per SN MT and configured for the SN MT via an RRC message. The cell selection or reselection configuration may be a separate and / or different configuration from that of non-SN communication nodes (such as conventional UEs). The cell selection or reselection configuration may be configured via an RRC message or system information. The SN MT may perform cell reselection according to the cell reselection configuration.

[0069] For example, the cell selection or reselection configuration may include at least one of the following settings: (1) the cell reselection priority for a frequency or a cell, (2) for the current serving frequency or between frequencies, the minimum threshold of the beam that can be used to select the highest ranked cell or the minimum threshold of the beam used to derive the cell measurement quantity, or the offset for a non-SN mobile device, (3) for the current serving frequency or between frequencies, the number of beams that can be used to select the highest ranked cell, or the number of beams used to derive the cell measurement quantity, (4) the cell reselection timer value that can be configured for a specific frequency, or alternatively or additionally, the offset of the cell reselection timer value for a non-SN device, or alternatively or additionally, the scaling factor of the cell reselection timer value for a non-SN device, (5) the RSRP or RSRQ threshold used by the SN MT when the SN MT reselects to a priority frequency higher than / lower than / equal to the current serving frequency, or alternatively or additionally, the offset of the RSRP or RSRQ threshold used by the SN MT when the SN MT reselects to a priority frequency higher than / lower than / equal to the current serving frequency of the non-SN device, (6) the RSRP or RSRQ threshold for intra-frequency or inter-frequency measurements, or alternatively or additionally, the offset of the RSRP or RSRQ threshold for intra-frequency or inter-frequency measurements for a non-SN mobile device, (7) the minimum required transceiver (Rx) level or RSRQ in a cell, or alternatively or additionally, the offset of the minimum required Rx level or RSRQ in a cell for a non-SN mobile device, (8) the offset between two cells, or alternatively or additionally, the offset of the offset between two cells for a non-SN mobile device, (9) the frequency-specific offset for equal priority NR frequencies, or alternatively or additionally, the offset of the frequency-specific offset for equal priority NR frequencies for a non-SN mobile device, (10) the hysteresis value for the ranking criterion, or alternatively or additionally, the scaling factor of the hysteresis value, or alternatively or additionally, the offset of the hysteresis value for the ranking criterion for a non-SN mobile device, (11) the RSRP or RSRQ threshold for relaxed measurements, or alternatively or additionally, the offset of the RSRP or RCRQ threshold for relaxed measurements for a non-SN mobile device, (12) the RSRP or RSRQ threshold for evaluating the relaxed measurement not at the cell edge criterion, or alternatively or additionally, the offset of the RSRP or RSRQ threshold for evaluating the relaxed measurement not at the cell edge criterion for a non-SN mobile device, or (13) the threshold on the RSRP change for evaluating the static criterion of the relaxed measurement, or alternatively or additionally, the offset of the threshold on the RSRP change for evaluating the static criterion of the relaxed measurement for a non-SN mobile device.

[0070] Here, the BS can provide separate cell selection or reselection configurations for the SN MT. Considering the different characteristics and functions from ordinary mobile devices, it is beneficial to keep the SN MT in the last serving cell until the SN MT is released to the RRC_IDLE or RRC_INACTIVE state. To achieve this, the BS can configure more stringent conditions for cell reselection (e.g., a higher hysteresis value for the ranking criterion or a higher cell reselection timer value). As a result, it is less likely for the SN MT to reselect a new serving cell due to short-term changes in the radio environment.

[0071] The BS can configure different frequency priorities or different frequency lists for cell reselection of the SN MT from those of a conventional UE. This is beneficial because the functions of the SN and the conventional UE are different. Then, during the cell reselection procedure between the SN MT and the conventional mobile terminal, the BS can implement different strategies for frequency selection.

[0072] When the BS releases the SN MT to the RRC_IDLE or RRC_INACTIVE state, it can configure a forwarding configuration for the SN MT. Thus, the SN FWD can perform forwarding according to the forwarding configuration. The forwarding configuration can be associated with the configuration of a specific cell. For example, the forwarding configuration can include rules on how to forward the periodic common channels configured for the cell. The configurations of the common channels may be different among cells.

[0073] However, when the mobile device is released to the RRC_IDLE or RRC_INACTIVE state, it can perform a cell selection procedure, which means that the new serving cell after the cell selection procedure may not be the last serving cell from which the SN MT was released. Therefore, the forwarding configuration associated with a specific cell (e.g., the last serving cell before the SN MT is released to the RRC_IDLE or RRC_INACTIVE) may not be applicable to the newly reselected serving cell.

[0074] According to some embodiments of the present disclosure, the BS can configure information of one or more candidate or preferred cells for the SN MT, such that the SN MT can select one or more candidate or preferred cells identified or defined in the reselection or selection procedure.

[0075] For example, one or more candidate or preferred cells can be the last serving cell of the SN MT before transitioning to the RRC_IDLE or RRC_INACTIVE state. In this case, the BS can indicate the cell by including an indicator in the RRC message or system information. The indicator can be used to indicate that cell selection should not be performed after receiving the RRC release message. Alternatively or additionally, the indicator can be used to indicate that the SN MT selects or reselects the current serving cell.

[0076] According to one example, one or more candidate or preferred cells may be indicated by the cell identifiers of one or more candidate cells. The BS may configure one or more candidate cells. In this case, the SN MT may perform cell selection or reselection among one or more candidate or preferred cells indicated by the cell identifiers. For example, one or more candidate or preferred cells may be redirection cells configured by the BS when the SN MT is released to the RRC_IDLE or RRC_INACTIVE state.

[0077] According to one example, one or more candidate or preferred cells may be indicated by carrier information. In this case, the SN MT may consider all cells on the carrier as applicable cells. The SN MT may perform cell selection or reselection according to the carrier information. The SN MT may perform cell selection or reselection among these cells. The carrier may be a redirection carrier, which may be configured by the BS when the SN MT is released to the RRC_IDLE or RRC_INACTIVE state.

[0078] According to one example, one or more candidate or preferred cells may be cells associated with a forwarding configuration. The BS may configure the forwarding configuration with information including the associated cells.

[0079] In the above example, if the serving cell of the BS is one of the one or more candidate or preferred cells, the BS may perform forwarding. If the serving cell of the BS is not one of the identified candidate or preferred cells, the BS may stop applying the forwarding configuration. Alternatively or additionally, the SN MT may treat one or more candidate or preferred cells with the highest priority for cell selection or reselection. The SN MT may preferably select or reselect one of the one or more candidate or preferred cells as the serving cell.

[0080] In the case where the BS configures only one candidate cell, the SN MT may select or reselect the only candidate cell as the serving cell. Cell selection or reselection may be performed when the SN MT is released to the RRC_IDLE or RRC_INACTIVE state, or when the SN MT is in the RRC_IDLE or RRC_INACTIVE state.

[0081] Therefore, when the SN MT is in the RRC_IDLE or RRC_INACTIVE state, the BS may control the cell where the SN will camp. It may prevent the SN MT from camping on a cell where the forwarding configuration is not applicable and forwarding cannot be performed.

[0082] According to some embodiments of the present disclosure, the BS may forward the applicability of the configured forwarding configuration based on the cell indication of the SN. For example, the BS may configure one or more sets of forwarding configurations. Each forwarding configuration may be associated with at least one specific cell (or applicable cell) or at least one specific frequency (or applicable frequency). The forwarding configuration may be configured by the BS to the SN MT via an RRC message. The cell or frequency associated with the corresponding forwarding configuration may be configured by the BS to the SN MT via an RRC message or system information.

[0083] Therefore, when the SN MT is in the RRC_IDLE or RRC_INACTIVE state, when the SN MT camps on the applicable cell or applicable frequency associated with or applicable to the forwarding configuration, the forwarding configuration may be applied by the SN MT or the SN FWD part.

[0084] When the SN MT is in the RRC_IDLE or RRC_INACTIVE state, when the SN MT does not camp on the applicable cell or applicable frequency applicable to or associated with the forwarding configuration, the forwarding configuration will not be applied by the SN MT or the SN FWD part and may be ignored.

[0085] In the present disclosure, the forwarding configuration may be associated with a cell, which means that when the cell is the serving cell of the SN MT, this forwarding configuration may be applied to the SN FWD. In the present disclosure, the forwarding configuration may be applied to a cell, which means that when the cell is the serving cell of the SN MT, the forwarding configuration is applicable.

[0086] One or more embodiments of the present disclosure provide a wireless communication method, including: receiving, by a wireless communication node, a forwarding configuration from a base station (BS), the forwarding configuration being associated with at least one first cell or at least one first frequency; and applying the forwarding configuration if the MT (mobile terminal) part of the wireless communication node camps on the at least one first cell or the at least one first frequency.

[0087] Optionally, for one or more wireless communication methods of the present disclosure, it further includes applying another forwarding configuration instead of this forwarding configuration when the MT part of the wireless communication node does not camp on the at least one first cell or the at least one first frequency.

[0088] Optionally, for one or more wireless communication methods of the present disclosure, it further includes receiving, from the BS, a cell selection or reselection configuration, which indicates whether cell reselection is allowed when the MT part of the wireless communication node is in the RRC idle state or the RRC inactive state.

[0089] Optionally, for one or more wireless communication methods of the present disclosure, it further includes performing cell reselection according to cell selection or reselection configuration received from the BS when the MT part of the wireless communication node is in the RRC idle state or the RRC inactive state.

[0090] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates candidate cells or preferred cells to be selected or reselected by the MT part.

[0091] Optionally, for one or more wireless communication methods of the present disclosure, the candidate cells or preferred cells include the last serving cell of the MT part before the MT part transitions to the RRC idle state or the RRC inactive state.

[0092] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates the candidate cells or preferred cells by one or more identifiers of the candidate cells or preferred cells or by carrier information of the candidate cells or preferred cells.

[0093] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates the priority of the candidate cells or preferred cells to be selected or reselected.

[0094] Optionally, for one or more wireless communication methods of the present disclosure, the forwarding configuration further indicates the cell selection or reselection configuration associated with the forwarding configuration.

[0095] Optionally, for one or more wireless communication methods of the present disclosure, the wireless communication method further includes receiving a cell selection or reselection configuration from the BS, where the cell selection or reselection configuration is different from the cell selection or reselection configuration of a user equipment (UE) connected to the BS via the wireless communication node.

[0096] One or more embodiments of the present disclosure provide a wireless communication method, including: establishing a backhaul link between a base station (BS) and a wireless communication node; and when the MT (mobile terminal) part of the wireless communication node resides on at least one first cell or at least one first frequency associated with a forwarding configuration, sending, by the BS, a forwarding configuration to be applied by the wireless communication node.

[0097] Optionally, for one or more wireless communication methods of the present disclosure, it further includes providing another forwarding configuration instead of the forwarding configuration when the MT part of the wireless communication node does not reside on at least one first cell or at least one first frequency.

[0098] Optionally, for one or more wireless communication methods of the present disclosure, it further includes the BS sending cell selection or reselection configuration, which indicates whether cell reselection is allowed when the MT part of the wireless communication node is in the RRC idle state or the RRC inactive state.

[0099] Optionally, for one or more wireless communication methods of the present disclosure, it further includes providing cell selection or reselection configuration to configure cell reselection of the MT part of the wireless communication node in the RRC idle state or the RRC inactive state.

[0100] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates candidate cells or preferred cells to be selected or reselected.

[0101] Optionally, for one or more wireless communication methods of the present disclosure, the candidate cells or preferred cells include the last serving cell of the MT part before the MT part transitions to the RRC idle state or the RRC inactive state.

[0102] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates candidate cells or preferred cells by one or more identifiers of the candidate cells or preferred cells or by carrier information of the candidate cells or preferred cells.

[0103] Optionally, for one or more wireless communication methods of the present disclosure, the cell selection or reselection configuration indicates the priority of candidate cells or preferred cells to be selected or reselected.

[0104] Optionally, for one or more wireless communication methods of the present disclosure, the forwarding configuration further indicates the cell selection or reselection configuration associated with the forwarding configuration.

[0105] Optionally, for one or more wireless communication methods of the present disclosure, it further includes the BS sending cell selection or reselection configuration, wherein the cell selection or reselection configuration is different from the cell selection or reselection configuration of a user equipment (UE) connected to the BS via the wireless communication node.

[0106] One or more embodiments of the present disclosure provide a wireless communication method, including: establishing a backhaul link between a base station (BS) and a wireless communication node; and controlling the forwarding operation of the forwarding part of the wireless communication node according to at least one of the following factors, the factors including measurement results of reference signals, radio link quality of the backhaul link, a timer started in response to the MT (mobile terminal) part in the wireless communication node entering the RRC idle state or the RRC inactive state, or selection or reselection of the serving cell of the MT part.

[0107] Optionally, for one or more wireless communication methods of the present disclosure, controlling the forwarding operation includes performing at least one of the following actions, including stopping forwarding a data packet or a wireless signal from a user equipment (UE) to a BS, or ignoring the forwarding configuration of the MT part or the forwarding part.

[0108] Optionally, for one or more wireless communication methods of the present disclosure, controlling the forwarding operation according to at least one of the factors includes performing at least one of the actions when at least one of the following conditions is met, the conditions including: the measurement result of the reference signal meets the measurement result condition, the occurrence of a beam failure of the reference signal, determining that the reference signal associated with the backhaul link quality is not the reference signal with the best wireless quality within a period of time, the wireless link quality of the backhaul link being lower than the threshold state, the value of the timer reaching the threshold time, the serving cell selected or reselected by the MT part not being the last serving cell before the MT part transitions to the RRC idle state or the RRC inactive state, the MT part selecting or reselecting a serving cell outside the predefined frequency range, the serving cell selected or reselected by the MT part not being a suitable cell, the serving cell selected or reselected by the MT part not being a cell with a predefined priority range, or the serving cell selected or reselected by the MT part not being a configured candidate cell.

[0109] Optionally, for one or more wireless communication methods of the present disclosure, it further includes initiating a procedure to establish or resume an RRC connection between the wireless communication node and the BS.

[0110] One or more embodiments of the present disclosure provide a wireless communication method, including: establishing a backhaul link between a base station and a wireless communication node; and receiving a forwarded data packet or a wireless signal from a forwarding part of the wireless communication node via a forwarding operation controlled according to at least one of the following factors, the factors including the measurement result of the reference signal, the wireless link quality of the backhaul link, a timer initiated in response to the MT (mobile terminal) part of the wireless communication node entering the RRC idle state or the RRC inactive state, and the selection or reselection of the serving cell of the MT part.

[0111] Optionally, for one or more wireless communication methods of the present disclosure, it further includes stopping receiving a data packet or a wireless signal forwarded from a user equipment (UE) to the BS.

[0112] Optionally, for one or more wireless communication methods of the present disclosure, it further includes stopping receiving the forwarded data packets or wireless signals when at least one of the following conditions is satisfied, and the conditions include: the measurement result of the reference signal satisfies the measurement result condition, the occurrence of the beam failure of the reference signal, determining that the reference signal associated with the backhaul link quality is not the reference signal with the best connection quality within a period of time, the wireless link quality of the backhaul link is lower than the threshold state, the value of the timer reaches the threshold time, the serving cell selected or reselected by the MT part is not the last serving cell before the MT part transitions to the RRC idle state or the RRC inactive state, the MT part selects or reselects a serving cell outside the predefined frequency range, the serving cell selected or reselected by the MT part is not a suitable cell, the serving cell selected or reselected by the MT part is not a cell with a predefined priority range, or the serving cell selected or reselected by the MT part is not a configured candidate cell.

[0113] Optionally, for one or more wireless communication methods of the present disclosure, it further includes responding to a procedure for establishing or restoring an RRC connection between a wireless communication node and a BS.

[0114] The present disclosure has been described with reference to the accompanying drawings for various exemplary embodiments to enable those of ordinary skill in the art to make and use the present disclosure. The present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. In addition, the specific order and / or hierarchy of the steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the specific order or hierarchy of the steps of the disclosed method or process can be rearranged while remaining within the scope of the present disclosure. Therefore, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or actions in an exemplary order, and unless otherwise expressly stated, the present disclosure is not limited to the specific order or hierarchy presented.

[0115] The present disclosure is intended to cover any possible variations, uses, combinations, or adaptive changes of the present disclosure that follow the general principles of the present disclosure, and includes the known knowledge and conventional technical means in the art as well as the content not disclosed in this application.

[0116] It should be understood that the present disclosure is not limited to the exact structures or operations described above and shown in the drawings, and various modifications and changes can be made without departing from the scope of this application. The scope of this application is only limited by the appended claims.

[0117] The above methods, devices, processes, circuits, and logic can be implemented in many different ways and in many different combinations of hardware and software. For example, all or part of the implementations can be circuits that include an instruction processor or controller, such as a Central Processing Unit (CPU), a microcontroller, or a microprocessor; or as an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a Field Programmable Gate Array (FPGA); or as a circuit that includes discrete logic or other circuit components, including analog circuit components, digital circuit components, or both; or any combination thereof. For example, the circuit can include discrete interconnected hardware components, or can be combined on a single integrated circuit die, distributed among multiple integrated circuit dies, or implemented in a Multiple Chip Module (MCM) of multiple integrated circuit dies in a common package.

[0118] Accordingly, the circuit can store or access instructions for execution, or can implement its functions only in hardware. The instructions can be stored in a tangible storage medium other than a transient signal, such as flash memory, Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM); or on a magnetic disk or an optical disk, such as a Compact Disc Read Only Memory (CDROM), a Hard Disk Drive (HDD), or other magnetic disk or optical disk; or in or on another machine-readable medium. A product, such as a computer program product, can include a storage medium and instructions stored in the medium or on the medium, and when the instructions are executed by a circuit in a device, the instructions can cause the device to implement any of the processes described above or shown in the drawings.

[0119] The implementation can be distributed. For example, a circuit can include multiple different system components, such as multiple processors and memories, and can span multiple distributed processing systems. Parameters, databases, and other data structures can be stored and managed separately, can be combined into a single memory or database, can be logically and physically organized in many different ways, and can be implemented in many different ways. Example implementations include linked lists, program variables, hash tables, arrays, records (e.g., database records), objects, and implicit storage mechanisms. Instructions can form part of a single program (e.g., a subroutine or other code segment), can form multiple separate programs, can be distributed across multiple memories and processors, and can be implemented in many different ways. Example implementations include stand-alone programs, and as part of a library, such as a shared library like a Dynamic Link Library (DLL). For example, the library can contain shared data and one or more shared programs, which include instructions that, when executed by the circuit, perform any of the processing described above or shown in the figures.

[0120] In some examples, each unit, subunit, and / or module of the system can include a logic component. Each logic component can be hardware or a combination of hardware and software. For example, each logic component can include an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), digital logic circuitry, analog circuitry, a combination of discrete circuits, gates, or any other type of hardware or a combination thereof. Alternatively or additionally, each logic component can include memory hardware, such as a portion of a memory, e.g., which includes instructions executable by a processor or other processor to implement one or more features of the logic component. When any one logic component includes a portion of a memory that includes instructions executable by a processor, the logic component can include or not include a processor. In some examples, each logic component can be just a portion of a memory or other physical memory, which includes instructions executable by a processor or other processor to implement the features of the corresponding logic component, and the logic component does not include any other hardware. Because each logic component includes at least some hardware even if the included hardware includes software, each logic component can be interchangeably referred to as a hardware logic component.

[0121] The second act can be said to be a "response" to the first act, regardless of whether the second act is directly or indirectly caused by the first act. The second act can occur much later than the first act and still be responsive to the first act. Similarly, even if intervening acts occur between the first act and the second act and even if one or more intervening acts directly cause the second act to be performed, the second act can be said to be a response to the first act. For example, if the first act sets a flag, a third act later initiates the second act, and whenever the flag is set, the second act can be responsive to the first act.

[0122] For clarification of use and to hereby give notice to the public, the applicant defines the phrase " 、 , … and <n>at least one of "or"< / n> ，… <n>or at least one of its combinations "or"< / n> ， … and / or <n>", replaces any other implicit definition above or below, and is used to denote one or more elements selected from the group consisting of A, B, …, and N, unless the applicant explicitly states the contrary. In other words, the phrase denotes any combination of one or more of the elements A, B, …, or N, including any one element alone or a combination of that one element with one or more other elements, which other elements may also combinatorially include additional elements not listed."< / n>

Claims

1. A wireless communication method, comprising: receiving, by a wireless communication node, a forwarding configuration from a base station (BS), the forwarding configuration being associated with at least one first cell or at least one first frequency; and applying the forwarding configuration if an MT (mobile terminal) part of the wireless communication node camps on the at least one first cell or at least one first frequency.

2. The method according to claim 1, further comprising applying another forwarding configuration instead of the forwarding configuration when the MT part of the wireless communication node does not camp on the at least one first cell or at least one first frequency.

3. The method according to claim 1, further comprising receiving, from the BS, a cell selection or reselection configuration, the cell selection or reselection configuration indicating whether cell reselection is allowed when the MT part of the wireless communication node is in an RRC idle state or an RRC inactive state.

4. The method according to claim 1, further comprising performing cell reselection according to the cell selection or reselection configuration received from the BS when the MT part of the wireless communication node is in an RRC idle state or an RRC inactive state.

5. The method according to claim 4, wherein The cell selection or reselection configuration indicates one or more candidate cells or one or more preferred cells to be selected or reselected by the MT part.

6. The method according to claim 5, wherein, The one or more candidate cells or one or more preferred cells include the last serving cell of the MT part before the MT part transitions to the RRC idle state or the RRC inactive state.

7. The method according to claim 5, wherein, The cell selection or reselection configuration indicates the one or more candidate cells or one or more preferred cells by one or more identifiers of the one or more candidate cells or one or more preferred cells or by carrier information of the one or more candidate cells or one or more preferred cells.

8. The method according to claim 5, wherein The cell selection or reselection configuration indicates priorities of the one or more candidate cells or one or more preferred cells to be selected or reselected.

9. The method according to claim 1, wherein, The forwarding configuration further indicates a cell selection or reselection configuration associated with the forwarding configuration.

10. The method according to claim 1 further comprises receiving cell selection or reselection configuration from the BS, wherein, The cell selection or reselection configuration is different from a cell selection or reselection configuration of a user equipment (UE) connected to the BS via the wireless communication node.

11. A wireless communication method, comprising: establishing a backhaul link between a base station (BS) and a wireless communication node; and sending, by the BS, a forwarding configuration to the wireless communication node, the forwarding configuration being applied by the wireless communication node when an MT (mobile terminal) part of the wireless communication node camps on at least one first cell or at least one first frequency associated with the forwarding configuration.

12. The method according to claim 11, further comprising providing another forwarding configuration instead of the forwarding configuration when the MT part of the wireless communication node does not camp on the at least one first cell or at least one first frequency.

13. The method according to claim 11 further includes the BS sending a cell selection or reselection configuration, the cell selection or reselection configuration indicating whether cell reselection is allowed when the MT part of the wireless communication node is in the RRC idle state or the RRC inactive state.

14. The method according to claim 11 further includes providing a cell selection or reselection configuration to configure cell reselection of the MT part of the wireless communication node in the RRC idle state or the RRC inactive state.

15. The method according to claim 14, wherein, The cell selection or reselection configuration indicates one or more candidate cells or one or more preferred cells to be selected or reselected.

16. The method according to claim 15, wherein, The one or more candidate cells or one or more preferred cells include the last serving cell of the MT part before the MT part transitions to the RRC idle state or the RRC inactive state.

17. The method according to claim 15, wherein The cell selection or reselection configuration indicates the one or more candidate cells or one or more preferred cells by one or more identifiers of the one or more candidate cells or one or more preferred cells or by carrier information of the one or more candidate cells or one or more preferred cells.

18. The method according to claim 15, wherein, The cell selection or reselection configuration indicates the priority of one or more candidate cells or one or more preferred cells to be selected or reselected.

19. The method according to claim 11, wherein The forwarding configuration further indicates a cell selection or reselection configuration associated with the forwarding configuration.

20. The method according to claim 11 further includes sending, by the BS, cell selection or reselection configuration, wherein, The cell selection or reselection configuration is different from the cell selection or reselection configuration of a user equipment (UE) connected to the BS via the wireless communication node.

21. A wireless communication method includes: establishing a backhaul link between a base station (BS) and a wireless communication node; and controlling a forwarding operation of a forwarding part of the wireless communication node according to at least one of the following factors, the factors including a measurement result of a reference signal, a radio link quality of the backhaul link, a timer started in response to an MT (mobile terminal) part of the wireless communication node entering the RRC idle state or the RRC inactive state, or a selection or reselection of a serving cell of the MT part.

22. The method according to claim 21, wherein, Controlling the forwarding operation includes performing at least one of the following actions, including stopping forwarding data packets or radio signals from a user equipment (UE) to the BS, or ignoring a forwarding configuration by the MT part or the forwarding part.

23. The method according to claim 22, wherein Controlling the forwarding operation according to at least one of the factors includes performing at least one of the actions when at least one of the following conditions is met, the conditions including: the measurement result of the reference signal meets the measurement result condition, the occurrence of a beam failure of the reference signal, determining that the reference signal associated with the backhaul link quality is not the reference signal with the best radio quality within a period of time, the radio link quality of the backhaul link being lower than the threshold state, the value of the timer reaching the threshold time, the serving cell selected or reselected by the MT part not being the last serving cell before the MT part transitions to the RRC idle state or the RRC inactive state, the MT part selecting or reselecting a serving cell outside the predefined frequency range, the serving cell selected or reselected by the MT part not being a suitable cell, the serving cell selected or reselected by the MT part not being a cell with a predefined priority range, or the serving cell selected or reselected by the MT part not being a configured candidate cell.

24. The method according to claim 21, further comprising initiating a procedure for establishing or restoring an RRC connection between the wireless communication node and the BS.

25. A wireless communication method, comprising: establishing a backhaul link between a base station and a wireless communication node; and receiving a forwarded data packet or a wireless signal from a forwarding part of the wireless communication node through a forwarding operation controlled according to at least one of the following factors, the factors including the measurement result of a reference signal, the radio link quality of the backhaul link, a timer initiated in response to the MT (mobile terminal) part of the wireless communication node entering the RRC idle state or the RRC inactive state, and the selection or reselection of a serving cell of the MT part.

26. The method according to claim 25, further comprising stopping receiving data packets or wireless signals forwarded from a user equipment (UE) to the BS.

27. The method according to claim 25 further comprises stopping receiving the forwarded data packets or wireless signals when at least one of the following conditions is satisfied, the conditions including: The measurement result of the reference signal meets the measurement result condition, the occurrence of a beam failure of the reference signal, determining that the reference signal associated with the backhaul link quality is not the reference signal with the best connection quality within a period of time, the radio link quality of the backhaul link being lower than the threshold state, the value of the timer reaching the threshold time, the serving cell selected or reselected by the MT part not being the last serving cell before the MT part transitions to the RRC idle state or the RRC inactive state, the MT part selecting or reselecting a serving cell outside the predefined frequency range, the serving cell selected or reselected by the MT part not being a suitable cell, the serving cell selected or reselected by the MT part not being a cell with a predefined priority range, or the serving cell selected or reselected by the MT part not being a configured candidate cell.

28. The method according to claim 25, further comprising responding to a procedure for establishing or restoring an RRC connection between the wireless communication node and the BS.

29. A wireless communication device includes a memory storing one or more programs and one or more processors, the one or more processors being electrically coupled to the memory and configured to execute the one or more programs to perform the method according to any one of claims 1 to 28.

30. A non-transitory computer-readable storage medium stores one or more programs, the one or more programs being configured to cause the execution of the method according to any one of claims 1 to 28 when executed by a processor.

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