Communication method, device and system

Abstract

Provided in an embodiment of the present application are a communication method, device and system, the method comprising: a first module of a transponder obtaining a first beam indication, the first beam indication being at least used for the first module to receive a signal from a first network device in a first frequency band, and / or the first module of the transponder obtaining a second beam indication, the second beam indication being at least used for the first module to receive a signal from a second network device in a second frequency band; the second beam indication is at least used for the first module to send a signal to the first network device in the first frequency band; the first module also obtains a third beam indication, the third beam indication at least being used for the second module of the repeater to receive a third signal from the second network device at the second frequency band, the third signal being used for being forwarded; and / or, the first module also obtains a fourth beam indication, and the fourth beam indication is at least used for the second module to forward a processed fourth signal from the terminal device to the second network device in the second frequency band; the first frequency band and the second frequency band are not overlapped in the frequency domain.

Description

Communication method, device and system Technical Field

[0001] The present application relates to the field of communications. Background Art

[0002] Compared to traditional 2G (second-generation mobile communication technology), 3G (third-generation mobile communication technology), and 4G (fourth-generation mobile communication technology) systems, 5G (fifth-generation mobile communication technology) systems offer greater bandwidth and higher data rates, and can support a wider range of terminal types and vertical services. To this end, the frequency band range / operating bandwidth supported by 5G systems is significantly larger than that of 2G, 3G, and 4G systems, and 5G systems support higher carrier frequencies. For example, 5G systems can be deployed in the millimeter wave band.

[0003] However, the higher the carrier frequency, the more severe the signal fading during transmission. Therefore, in the actual deployment of 5G systems, especially in the millimeter wave band, how to better enhance cell coverage has become an urgent problem to be solved.

[0004] To better address coverage issues in practical deployments of cellular mobile communication systems, RF relays (RF repeaters) are commonly used to amplify and forward signals between devices. RF repeaters are widely used in 2G, 3G, and 4G system deployments. Their advantages include low cost, ease of deployment, and minimal latency. Generally speaking, an RF repeater is a device that amplifies and forwards signals between devices in the RF domain. In other words, an RF repeater is a non-regenerative relay node that simply amplifies and forwards all received signals.

[0005] Furthermore, traditional RF transponders lack communication capabilities. In other words, they cannot exchange information with other devices (e.g., base stations / terminal devices). Specifically, in terms of reception, traditional RF transponders do not support measurement, demodulation, or decoding of received signals. In terms of transmission, traditional RF transponders only amplify and forward received RF signals and do not support signal generation or transmission.

[0006] Therefore, the operational configuration of traditional RF repeaters (e.g., antenna direction (beam direction and / or width (or size)), forwarding direction, on / off state, amplification gain, etc.) is not controlled by the network and is usually manually set or adjusted. For example, antenna direction is often manually set and adjusted during initial installation so that the base station antenna points in the direction of the base station's incoming waves and the terminal antenna points to the location where the enhanced deployment is required.

[0007] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0008] Summary of the Invention

[0009] The inventors have discovered that using traditional RF repeaters for coverage enhancement is a viable solution to the coverage issues encountered during 5G system deployment. However, because the operating configuration of traditional RF repeaters (e.g., antenna direction (beam direction and / or width (or size)), forwarding direction, switching state, amplification gain, etc.) is not controlled by the network, on the one hand, their effectiveness in amplifying and forwarding the target signal may not be ideal, and on the other hand, they may cause significant interference to other devices in the network, increasing the system's noise and interference levels, and thus reducing network throughput.

[0010] Taking antenna direction as an example, compared with 2G, 3G and 4G systems, 5G systems use more advanced and complex MIMO (multiple-input, multiple-output) technology. In 5G systems, especially for higher carrier frequencies, directional antennas become basic components of base stations and terminal devices, and sending and receiving signals based on beamforming technology is the basic signal transmission method in 5G systems. The (analog) beam direction, width (size), etc. of base stations and terminal devices may change dynamically due to factors such as position changes (that is, beam switching). However, the antenna of a traditional RF repeater cannot dynamically adjust its direction and has a wider beam. The beam direction and beam width of its transceiver antenna cannot flexibly match the position of the base station and terminal equipment and the dynamic changes in the beam direction and width of the transceiver antenna.

[0011] Figure 1 is an example of a transceiver antenna of an RF transponder deployed in a 5G system. As shown in Figure 1, when such an RF transponder is configured in a 5G system, on the one hand, the performance / effect of amplifying / enhancing the target signal may not be significant due to the mismatch between the beam direction and beam width of its transceiver antenna and the dynamic changes in the beam direction and width of the transceiver antennas of the base station and terminal equipment. On the other hand, due to the use of a wider transmission beam, it may also cause significant interference to other devices (such as base stations or terminal equipment) within a larger range, thereby increasing the noise and interference level of the entire system and thereby reducing network throughput.

[0012] To address at least one of the aforementioned issues, the network (base station) can exercise some control over the operational configuration of the RF transponder. To enable network control of the RF transponder's operational configuration, information exchange between the network (base station) and the RF transponder is required, enabling the RF transponder to set and / or adjust operational configurations, such as antenna direction (beam direction and / or width (or size)), forwarding direction, on / off status, and amplification gain, based on instructions from the network (base station). In other words, the RF transponder has communication capabilities to receive (demodulate / measure / decode / interpret, etc.) information sent by the network (base station) and / or to send information to the network (base station).

[0013] However, there is currently no specific method for how to support the above information interaction and how the radio frequency repeater works while supporting the above information interaction.

[0014] To address the above issues, embodiments of the present application provide a communication method, apparatus, and system to support information interaction between a network device (base station) and a radio frequency repeater, so that the radio frequency repeater operates while supporting the above information interaction.

[0015] In the embodiment of the present application, it involves beam indication of a radio frequency repeater in the case of supporting information interaction with a network.

[0016] According to one aspect of an embodiment of the present application, a communication device is provided, configured in a repeater, the device comprising a first module and a second module, wherein:

[0017] The first module acquires a first beam indication, where the first beam indication is at least used by the first module to receive a signal from a first network device in a first frequency band, and / or the first module of the repeater acquires a second beam indication, where the second beam indication is at least used by the first module to send a signal to the first network device in the first frequency band;

[0018] The first module obtains a third beam indication, where the third beam indication is at least used by the second module of the repeater to receive a third signal from the second network device in the second frequency band, where the third signal is used to be forwarded; and / or the first module obtains a fourth beam indication, where the fourth beam indication is at least used by the second module to forward a processed fourth signal from the terminal device to the second network device in the second frequency band;

[0019] The first frequency band and the second frequency band do not overlap in the frequency domain.

[0020] One of the beneficial effects of the embodiments of the present application is that: according to the embodiments of the present application, by obtaining the first beam indication and / or the second beam indication, communication (information interaction) between the repeater and the base station (first network device) can be achieved. In addition, by obtaining the third beam indication and / or the fourth beam indication, the repeater can forward the signal between the base station (second network device) and the terminal device.

[0021] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0022] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0024] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0025] FIG1 is a schematic diagram of an example of a transceiver antenna of a radio frequency transponder deployed in a 5G system;

[0026] FIG2 is a schematic diagram of an example of NCR;

[0027] FIG3 is a schematic diagram of an example of an implementation scenario of an embodiment of the present application;

[0028] FIG4 is a schematic diagram of the relationship between the link and the frequency range of NCR;

[0029] FIG5 is a schematic diagram of a communication method according to an embodiment of the present application;

[0030] FIG6 is a schematic diagram of a network architecture corresponding to the method of FIG5 ;

[0031] FIG7 is another schematic diagram of a network architecture corresponding to the method of FIG5 ;

[0032] FIG8 is a diagram illustrating an example of a relationship between a frequency range (FR) and a frequency band within the frequency range in terms of frequency;

[0033] FIG9 is a schematic diagram showing an example of a relationship between a frequency band and a carrier in the frequency band in terms of frequency;

[0034] FIG10 is a schematic diagram of the first to sixth beams;

[0035] FIG11 is another schematic diagram of the first to sixth beams;

[0036] FIG12 is another schematic diagram of the first to sixth beams;

[0037] FIG13 is another schematic diagram of the first to sixth beams;

[0038] FIG14 is a schematic diagram of an example of a repeater receiving a signal according to a method according to an embodiment of the present application;

[0039] FIG15 is a schematic diagram of another example of a repeater receiving a signal according to a method according to an embodiment of the present application;

[0040] FIG16 is a schematic diagram of an example of a repeater sending a signal according to a method according to an embodiment of the present application;

[0041] FIG17 is a schematic diagram of another example of a repeater sending a signal according to a method according to an embodiment of the present application;

[0042] FIG18 is a schematic diagram of an example of a repeater forwarding a signal according to a method according to an embodiment of the present application;

[0043] FIG19 is a schematic diagram of a communication device according to an embodiment of the present application;

[0044] FIG20 is a schematic diagram of a transponder according to an embodiment of the present application;

[0045] Figure 21 is a schematic diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0047] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0048] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0049] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0050] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), etc., and / or other currently known or future communication protocols to be developed.

[0051] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0052] Base stations may include, but are not limited to, NodeBs (NBs), evolved NodeBs (eNodeBs or eNBs), and 5G base stations (gNBs), among others. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0053] In the embodiments of the present application, the term "user equipment" (UE) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "terminal equipment" (TE). Terminal equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, user, subscriber station (SS), access terminal (AT), station, etc.

[0054] Terminal devices may include, but are not limited to, the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, etc.

[0055] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0056] In order to make the embodiments of the present application easier to understand, the terms and scenarios involved in the embodiments of the present application are illustrated below.

[0057] In the embodiment of the present application, the radio frequency repeater with the aforementioned communication function may be called an NCR (network-controlled repeater) or an SR (smart repeater), etc., but is not limited thereto.

[0058] Figure 2 is a schematic diagram of an example of the NCR. As shown in Figure 2, the NCR 21 is functionally divided into two parts: NCR-MT (Mobile Termination) 211 and NCR-Fwd (Forwarding) 212. The NCR-MT 211 is used to communicate with the gNB 22 via a control link (C-link) to exchange information. The exchanged information includes, for example, side control information. The control link is based on the Uu interface of the NR, and the side control information is used to control at least the NCR-Fwd 212. In addition, the NCR-Fwd 212 is used to perform UL (uplink) and / or DL ​​(downlink) radio frequency signal (RF signal) amplification and forwarding between the gNB 22 and the UE 23 via the backhaul link (B-link) and the access link (A-link). The behavior of the NCR-Fwd 212 is controlled according to the side control information and / or other information received from the gNB 22.

[0059] In the above example, the number of gNBs 22 and UEs 23 can be one or more. The gNBs communicating with the NCR-MT and the gNBs whose RF signals are amplified and forwarded by the NCR-Fwd may or may not overlap.

[0060] Currently, NR supports a wide frequency range. As of NR Rel-17, multiple frequency ranges have been defined, such as FR1 and FR2. FR2 can be further divided into FR2-1 and FR2-2.

[0061] Because high frequencies (such as FR2) have a smaller coverage area, using them to ensure basic coverage (e.g., supporting initial UE access and establishing / reestablishing RRC connections) requires deploying a large number of sites at a high density, which is costly. Therefore, in current deployments, some operators use low frequencies (e.g., FR1) to ensure basic coverage, while high frequencies (e.g., FR2) are used as hotspot coverage for traffic offload or capacity enhancement, but not for ensuring basic coverage (e.g., not supporting initial UE access and establishing / reestablishing RRC connections).

[0062] At the same time, since high-frequency coverage is small and signals are easily blocked, NCR may only be used to amplify and forward high-frequency signals, but not to amplify and forward low-frequency signals.

[0063] Figure 3 is a schematic diagram of an example implementation scenario of an embodiment of the present application. As shown in Figure 3 , NCR 31 communicates with first gNB 32 via a control link (C-link) to exchange information. The control link is based on the NR Uu interface. In addition, NCR 31 can also perform UL (uplink) / DL (downlink) radio frequency signal amplification and forwarding between second gNB 34 and UE 33 via a backhaul link and an access link. For example, it can perform amplification and forwarding based on information received from first gNB 32.

[0064] In addition, in the scenario of Figure 3, NCR 31 performs signal amplification and forwarding operations between the second gNB 34 and UE 33 at a high frequency (e.g., FR2), and performs communication operations with the first gNB 32 at a low frequency (e.g., FR1), but the present application is not limited to this. The scenario of Figure 3 is only an example. For example, NCR 31 can also perform signal amplification and forwarding operations between the first gNB 32 and UE 33 at a low frequency (e.g., FR1), and / or perform communication operations with the first gNB 32 at a high frequency (e.g., FR2); for another example, the second gNB 34 and the first gNB 32 can also be the same, etc.

[0065] In the example of Figure 3, the first gNB 32 and the second gNB 34 can be the same network device or different network devices. The meaning of the network device has been explained above and will not be repeated here.

[0066] Figure 4 is a schematic diagram of the relationship between the NCR link and the frequency range. As shown in Figure 4, the frequency range involved in the control link is FR1 or FR1 and FR2, that is, the NCR-MT can receive and / or send physical signals in FR1 or FR1 and FR2; the frequency range involved in the backhaul link and the access link is FR2, that is, the NCR-Fwd amplifies and forwards the RF signal in FR2.

[0067] The following describes various implementations of the present application in conjunction with the accompanying drawings. These implementations are merely illustrative and are not intended to limit the present application.

[0068] Embodiments of the first aspect

[0069] An embodiment of the present application provides a communication method.

[0070] FIG5 is a schematic diagram of a communication method according to an embodiment of the present application. As shown in FIG5 , the method includes:

[0071] 501: A first module of a repeater obtains a first beam indication, where the first beam indication is at least used by the first module to receive a signal from a first network device in a first frequency band, and / or the first module of the repeater obtains a second beam indication, where the second beam indication is at least used by the first module to send a signal to the first network device in the first frequency band.

[0072] 502: The first module obtains a third beam indication, and the third beam indication is used at least for the second module of the repeater to receive a third signal from the second network device in the second frequency band, and the third signal is used to be forwarded; and / or, the first module obtains a fourth beam indication, and the fourth beam indication is used at least for the second module to forward the processed fourth signal from the terminal device to the second network device in the second frequency band; the first frequency band and the second frequency band do not overlap in the frequency domain.

[0073] In an embodiment of the present application, the first beam indication and / or the second beam indication are used for the first module of the repeater to communicate with the network device (first network device) in the first frequency band; the third beam indication and / or the fourth beam indication are used for the second module of the repeater to forward the signal (radio frequency signal) between the network device (second network device) and the terminal device in the second frequency band. Thus, it is possible to realize communication (information interaction) between the repeater and the base station (first network device) in the first frequency band, and the repeater forwards the signal between the base station (second network device) and the terminal device in the second frequency band. In addition, the first frequency band and the second frequency band do not overlap in the frequency domain, and the repeater can operate in a network deployment scenario where different frequency bands are used for basic coverage and hotspot coverage, respectively. For example, the first frequency band is at a low frequency for basic coverage, and the second frequency band is at a high frequency for hotspot coverage. The first module of the repeater communicates with the network in the first frequency band, and the network controls the second module of the repeater through side control information and / or other information on how / whether to amplify and forward the radio frequency signal in the second frequency band to expand the hotspot coverage.

[0074] In the above embodiment, the example of the repeater forwarding signals in the second frequency band is used for explanation, but the present application is not limited thereto. The repeater can also forward signals in the first frequency band, wherein the operation of forwarding signals in the first frequency band can be incorporated into the second module, or can be implemented by other modules (third modules) independent of the second module. For example, the repeater includes two forwarding modules (NCR-Fwd), the first forwarding module is used to forward signals in the first frequency band, and the second forwarding module is used to forward signals in the second frequency band, and the side control information and / or other information from the network device is used to control the first forwarding module and / or the second forwarding module of the repeater. That is, the second module includes the first forwarding module and the second forwarding module; or, the second module includes the second forwarding module, and the other module (third module) independent of the second module includes the first forwarding module.

[0075] In some embodiments, the third module is only used to amplify and forward radio frequency signals.

[0076] In some embodiments, in addition to amplifying and forwarding radio frequency signals, the third module is also used to receive and / or send physical signals, such as synchronization signals (e.g., PSS, SSS), physical layer broadcast channels (e.g., PBCH), reference signals (e.g., CSI-RS, TRS, SRS, PRS, DMRS, PT-RS), physical layer control channels (e.g., PDCCH, PUCCH), physical layer data channels (e.g., PDSCH, PUSCH), etc.

[0077] In the above embodiment, the example of the repeater communicating with the network device (first network device) in the first frequency band is used for explanation, but the present application is not limited to this. The repeater can also communicate with the network device (second network device) in the second frequency band, wherein the operation of communicating in the second frequency band can be incorporated into the first module, or can be implemented by other modules (fourth modules) independent of the first module. For example, the repeater includes two mobile terminals (NCR-MT), the first mobile terminal is used to communicate with the network device in the first frequency band, and the second mobile terminal is used to communicate with the network device in the second frequency band. That is, the first module includes the first mobile terminal and the second mobile terminal; or, the first module includes the first mobile terminal, and the other module (fourth module) independent of the second module includes the second mobile terminal.

[0078] For example, in some embodiments, the first beam indication and / or the second beam indication are further used by the second module or the third module of the repeater to forward a signal (radio frequency signal) between the network device (first network device) and the terminal device in the first frequency band. For example, the first beam indication is further used by the second module or the third module of the repeater to receive a first signal from the first network device in the first frequency band, where the first signal is to be forwarded, and / or the second beam indication is further used by the second module or the third module of the repeater to forward a processed second signal from the terminal device to the first network device in the first frequency band.

[0079] For example, in some embodiments, the third beam indication and / or the fourth beam indication are further used for the first module or the fourth module of the repeater to communicate with the network device (the second network device) in the second frequency band. For example, the third beam indication is further used for the first module or the fourth module of the repeater to receive a signal from the second network device in the second frequency band (the second downlink carrier), and / or the fourth beam indication is further used for the first module or the fourth module of the repeater to send a signal to the network device (the second network device) in the second frequency band (the second uplink carrier).

[0080] In an embodiment of the present application, the first module is at least used to receive and / or transmit physical signals, such as synchronization signals (e.g., PSS, SSS), physical broadcast channels (e.g., PBCH), reference signals (e.g., CSI-RS, TRS, SRS, PRS, DMRS, PT-RS), physical layer control channels (e.g., PDCCH, PUCCH), physical layer data channels (e.g., PDSCH, PUSCH), etc. The first module is, for example, a mobile termination (MT) of a repeater, such as the aforementioned NCR-MT. In addition, the first module may also be called by other names.

[0081] In the embodiment of the present application, the second module is at least used to amplify and forward radio frequency signals. The second module is, for example, a forwarding module / unit of a repeater, such as the aforementioned NCR-Fwd. In addition, the second module may also be called by other names.

[0082] In some embodiments, the second module is only used to amplify and forward radio frequency signals.

[0083] In some embodiments, in addition to amplifying and forwarding radio frequency signals, the second module is also used to receive and / or send physical signals, such as synchronization signals (e.g., PSS, SSS), physical layer broadcast channels (e.g., PBCH), reference signals (e.g., CSI-RS, TRS, PRS, SRS, DMRS, PT-RS), physical layer control channels (e.g., PDCCH, PUCCH), physical layer data channels (e.g., PDSCH, PUSCH), etc.

[0084] In the above embodiment, the third signal / first signal is used to be forwarded, which means that the third signal / first signal is processed by the repeater and then forwarded. The processing here includes amplification. For example, the repeater receives the third signal / first signal in the radio frequency domain (that is, the third signal / first signal is a radio frequency signal), amplifies the third signal / first signal, and then forwards it.

[0085] In the above embodiment, the fourth signal / second signal originates from the terminal device and is processed by the repeater, where processing also includes amplification. For example, the repeater receives the signal from the terminal device, amplifies the signal to obtain the fourth signal / second signal, and then forwards the fourth signal / second signal to the second network device / first network device.

[0086] In some embodiments, the third beam indication is also used by the first module of the repeater to receive signals from the second network device in the second frequency band, and / or the fourth beam indication is also used by the first module of the repeater to send signals to the second network device in the second frequency band.

[0087] In some embodiments, the first module may further obtain a fifth beam indication, which is used at least by the second module to transmit a processed third signal in the second frequency band. For example, the second module amplifies the third signal and then transmits the amplified third signal. Furthermore, in some embodiments, the first module may further obtain a sixth beam indication, which is used at least by the second module to receive a fourth signal in the second frequency band. For example, the second module receives the fourth signal from a terminal device in the second frequency band.

[0088] In some embodiments, the first to sixth beam indications include at least information related to the beam and / or the spatial filter and / or the reference signal, where the information includes at least one of the following information:

[0089] spatial filter index and / or beam index;

[0090] Reference signal index;

[0091] Number of antenna ports for reference signals;

[0092] Antenna polarization information;

[0093] Beamwidth information; and

[0094] Beam direction information.

[0095] In the above embodiment, the number of antenna ports of the reference signal may be 1 or 2, the antenna polarization information may include single polarization or multi-polarization, the beam width information may include the number of antenna ports in the first dimension and the number of antenna ports in the second dimension, and the beam direction information may include a codebook index, which may correspond to an emission angle or an antenna transmit phase.

[0096] In the embodiment of the present application, the spatial filter may be implicitly indicated by at least one of a spatial filter index, a beam index, and a reference signal index.

[0097] For example, the network device only indicates the index of the spatial filter, beam, or reference signal to be used, and the forwarder determines the specific spatial filter to be used based on the index. In this case, for example, the forwarder receives a CSI-RS configuration that is not used for CSI-RS reception or transmission, but is used by the forwarder to determine the spatial filter to be used.

[0098] In the embodiment of the present application, the spatial filter can also be explicitly indicated by antenna polarization information, beam width information, and beam direction information. In other words, the specific spatial filter is indicated to the repeater by antenna polarization information, beam width information, and beam direction information.

[0099] For example, the number of antenna ports of the reference signal is 1 or 2.

[0100] For example, the antenna polarization information includes single polarization or multi-polarization.

[0101] In an embodiment of the present application, the above two points can be combined, that is, the number of antenna ports of the reference signal and the antenna polarization information can be combined or corresponded. For example, the number of antenna ports is 1 corresponding to a single-polarized antenna, and the number of antenna ports is 2 corresponding to a dual-polarized antenna; in other words, if the antenna of the repeater is single-polarized, the corresponding number of antenna ports of the reference signal is 1; if the antenna of the repeater is dual-polarized, the corresponding number of antenna ports of the reference signal is 2.

[0102] For example, the beam width information includes the number n1 of antenna ports in a first dimension and the number n2 of antenna ports in a second dimension. For example, the first dimension is a horizontal dimension, and the second dimension is a vertical dimension.

[0103] Wherein, n1≤N1, n2≤N2, N1 and N2 are respectively the maximum number of antenna ports in the first dimension supported by the repeater and the maximum number of antenna ports in the second dimension supported by the repeater.

[0104] For example, the beam direction information includes a codebook index.

[0105] For example, a repeater may be configured with one or more candidate codebook indexes. Each codebook index corresponds to an angle of departure or an antenna transmit phase. The network device sends a codebook index indication to the repeater, which corresponds to one or more of the candidate codebook indexes. Thus, the terminal device determines the spatial domain filter (e.g., beam direction and / or beamwidth) used to transmit or receive the signal based on the indicated codebook index.

[0106] In some embodiments, the aforementioned beam indications are used at least for the first module or the second module to send and / or receive signals, which means that the first module or the second module uses the spatial filter corresponding to each beam indication to send and / or receive signals.

[0107] In the above embodiments, the aforementioned beam indicators refer to the first to sixth beam indicators. For example, the first beam indicator is at least used for the first module to receive a signal from the first network device in the first frequency band, which means that the first module uses the spatial filter corresponding to the first beam indicator to receive the signal from the first network device. For another example, the second beam indicator is at least used for the first module to send a signal to the first network device in the first frequency band, which means that the first module uses the spatial filter corresponding to the second beam indicator to send the signal to the first network device. For another example, the third beam indicator is at least used for the second module to receive a third signal from the second network device in the second frequency band, which means that the second module uses the spatial filter corresponding to the third beam indicator to receive the third signal from the second network device. For another example, the fourth beam indicator is at least used for the second module to forward a processed fourth signal from the terminal device to the second network device in the second frequency band, which means that the second module uses the spatial filter corresponding to the fourth beam indicator to forward the processed fourth signal from the terminal device to the second network device in the second frequency band. With respect to the fifth and sixth beam indicators, the meaning of "at least used for" is similar to that of the first to fourth beam indicators, and their explanation is omitted here.

[0108] In some embodiments, the first to sixth beam indications are carried by dynamic signaling or semi-static signaling. Dynamic signaling can be, for example, downlink control information (DCI) or physical downlink control channel (PDCCH). Semi-static signaling can be, for example, MAC CE (Media Access Control Element) signaling or RRC (Radio Resource Control) signaling.

[0109] In the embodiments of the present application, the first network device and the second network device may be the same or different. Taking the scenario in Figure 3 as an example, the first network device may be the first gNB 32, and the second network device may be the second gNB 34. However, the present application is not limited thereto. As shown in Figure 2 , the first network device and the second network device may both be the first gNB 32 or the second gNB 34.

[0110] Figure 6 is a schematic diagram of a network architecture corresponding to the method of Figure 5. In Figure 6, the first module is NCR-MT and the second module is NCR-Fwd as an example. As shown in Figure 6, NCR-MT obtains the first to sixth beam indications, receives a signal from the first network device in the first frequency band according to the first beam indication, and sends a signal to the first network device in the first frequency band according to the second beam indication. In addition, NCR-Fwd receives a third signal from the second network device in the second frequency band according to the third beam indication, processes the third signal, and forwards the processed third signal to the UE in the second frequency band according to the fifth beam indication. In addition, NCR-Fwd also receives a fourth signal from the UE in the second frequency band according to the sixth beam indication, processes the fourth signal, and forwards the processed fourth signal to the second network device in the second frequency band according to the fourth beam indication.

[0111] FIG7 is another schematic diagram of a network architecture corresponding to the method of FIG5 . In FIG7 , the first module is NCR-MT and the second module is NCR-Fwd as an example. As shown in FIG7 , NCR-MT obtains first to sixth beam indications. Unlike the example of FIG6 , NCR-Fwd can also receive a first signal from a first network device in a first frequency band according to the first beam indication, amplify the first signal, and send the processed first signal to a UE in the first frequency band, and / or, NCR-Fwd can also receive a second signal from a UE in the first frequency band, amplify the second signal, and send the processed second signal to the first network device in the first frequency band according to the second beam indication.

[0112] In the embodiment of the present application, the first frequency band and the second frequency band may be located in different frequency ranges. For example, the first frequency band is located in a first frequency range, and the second frequency band is located in a second frequency range.

[0113] In an embodiment of the present application, the first frequency range and the second frequency range do not overlap in frequency and each include one or more operating bands. For example, the first frequency range is FR1 and the second frequency range is FR2. For another example, the first frequency range is FR1 and the second frequency range is FR2-1. For another example, the first frequency range is FR2-1 and the second frequency range is FR2-2.

[0114] In some embodiments, the subcarrier spacing (SCS) of the first frequency range and the second frequency range are different. Here, different means not completely the same or completely different (no intersection). For example, the subcarrier spacing of the first frequency range can be 15kHz and / or 30kHz, and the subcarrier spacing of the second frequency range can be 60kHz and / or 120kHz. For another example, the subcarrier spacing of the first frequency range can be 15kHz and / or 30kHz and / or 60kHz, and the subcarrier spacing of the second frequency range can be 60kHz and / or 120kHz.

[0115] In some embodiments, the subcarrier spacing of a frequency range refers to the subcarrier spacing defined for the frequency range. The subcarrier spacing defined for the frequency band within the first frequency range is a subset of the subcarrier spacing defined for the frequency range.

[0116] In some embodiments, the subcarrier spacing (SCS) of the first frequency band and the second frequency band are different. Different means not completely the same or completely different (no intersection). For example, the subcarrier spacing of the first frequency band can be 15kHz and / or 30kHz, and the subcarrier spacing of the second frequency band can be 60kHz and / or 120kHz. For another example, the subcarrier spacing of the first frequency band can be 15kHz and / or 30kHz and / or 60kHz, and the subcarrier spacing of the second frequency band can be 60kHz and / or 120kHz.

[0117] In some embodiments, the subcarrier spacing of a frequency band refers to the subcarrier spacing defined for the frequency band. For example, as shown in the table below, the subcarrier spacing of band n1 / n2 is 15, 30, and 60 kHz. Carriers configured within the frequency band may use one or more subcarrier spacings defined for the frequency band (different BWPs within a carrier may use the same or different subcarrier spacings).

[0118]

[0119] In some embodiments, the first frequency band includes a first carrier (or a first cell), and the first carrier (or the first cell) includes a first downlink carrier and / or a first uplink carrier. The fact that the first frequency band includes the first carrier means that, in terms of frequency, the first carrier is within the first frequency band. That is, the bandwidth of the first carrier is within the bandwidth of the first frequency band. The first frequency band is TDD (time division duplex) (unpaired) or FDD (frequency division duplex) (paired) or SDL or SUL. If the first frequency band is FDD, the first frequency band includes a first downlink frequency band and a first uplink frequency band, the first downlink frequency band includes the first downlink carrier, and the first uplink frequency band includes the first uplink carrier. The fact that the first frequency band includes the first cell means that the carrier of the first cell (including the first downlink carrier and / or the first uplink carrier) is within the first frequency band.

[0120] Fig. 8 is a diagram showing an example of the relationship between a frequency range (FR) and a frequency band within the frequency range. Fig. 9 is a diagram showing an example of the relationship between a frequency band and a carrier within the frequency band.

[0121] In the above embodiment, the first downlink carrier and the first uplink carrier may be co-frequency (ie, located at the same position in the frequency domain) or different-frequency (ie, not overlapping in the frequency domain).

[0122] In some embodiments, the second frequency band includes a second carrier (or a second cell), and the second carrier (or the second cell) includes a second downlink carrier and / or a second uplink carrier. The second frequency band including the second carrier means that, in terms of frequency, the second carrier is within the second frequency band. That is, the bandwidth of the second carrier is within the bandwidth of the second frequency band. The second frequency band is TDD (unpaired) or FDD (paired) or SDL or SUL. If the second frequency band is FDD, the second frequency band includes a second downlink band and a second uplink band, the second downlink band includes a second downlink carrier, and the second uplink band includes a second uplink carrier. The second frequency band includes the second cell, which means that the carrier of the second cell (including the second downlink carrier and / or the second uplink carrier) is within the second frequency band.

[0123] In the above embodiment, the second downlink carrier and the second uplink carrier may be co-frequency (ie, located at the same position in the frequency domain) or different-frequency (ie, not overlapping in the frequency domain).

[0124] In the aforementioned embodiments, the same location in the frequency domain means the same center frequency (frequency point) (i.e., the corresponding frequency band is TDD). In addition, in the aforementioned embodiments, non-overlapping in the frequency domain includes different center frequencies (frequency points) (i.e., the corresponding frequency band is FDD).

[0125] In some embodiments, the subcarrier spacing of the first downlink carrier and the second downlink carrier is different. Wherein, different means not completely the same or completely different (no intersection). For example, the SCS of the first downlink carrier is 15 kHz, and the SCS of the second downlink carrier is 120 kHz.

[0126] In some embodiments, the subcarrier spacing of the first uplink carrier and the second uplink carrier is different. Wherein, different means not completely the same or completely different (no intersection). For example, the SCS of the first uplink carrier is 15 kHz, and the SCS of the second uplink carrier is 120 kHz.

[0127] In some embodiments, the first module can receive (including demodulation, and / or measurement, and / or decoding, and / or interpretation, etc.) and / or send (including physical resource mapping, etc.) signals in the second frequency band.

[0128] For example, the first module receives a signal from the first network device in the second frequency band according to the third beam indication, and / or the first module sends a signal to the first network device in the second frequency band according to the fourth beam indication.

[0129] In the aforementioned embodiments, the first module can receive signals on one or more carriers of the first frequency band and / or the second frequency band, such as receiving SSB, CSI-RS, PDCCH, PDSCH, etc., and the first module can also send signals on one or more carriers of the first frequency band and / or the second frequency band, such as sending PRACH, SRS, PUCCH, PUSCH, etc.

[0130] In the above embodiment, when the first module receives signals on multiple carriers of the first frequency band and / or the second frequency band, the types of signals received by the first module in different frequency bands or different carriers are the same or different, that is, the signals to be received in different frequency bands or carrier configurations are the same or different. For example, the first module receives the same type of signals in two frequency bands or carriers, both including SSB, CSI-RS, PDCCH, PDSCH, etc.; for another example, the first module receives different types of signals in two frequency bands or carriers, and receives SSB, CSI-RS, PDCCH, PDSCH, etc. on one downlink carrier and only receives SSB and CSI-RS on the other downlink carrier. The above is just an example, and the present application is not limited to this.

[0131] In the above embodiment, when the first module transmits signals on multiple carriers in the first frequency band and / or the second frequency band, the types of signals transmitted by the first module in different frequency bands or different carriers are the same or different, that is, the signals to be transmitted in different frequency bands or carrier configurations are the same or different. For example, the first module transmits the same type of signals in two frequency bands or carriers, including PRACH, SRS, PUCCH, PUSCH, etc.; for another example, the first module transmits different types of signals in two frequency bands or carriers, with PRACH, SRS, PUCCH, PUSCH, etc. transmitted on one uplink carrier and only PRACH transmitted on the other uplink carrier.

[0132] In some embodiments, the first module may receive a first reference signal, such as an SSB, a CSI-RS, etc., on the aforementioned first downlink carrier and / or the second downlink carrier.

[0133] In some embodiments, the first reference signal is a downlink reference signal. The first reference signal is used for beam management. The first reference signal includes, for example, an SSB and / or a CSI-RS.

[0134] In some embodiments, the first reference signal includes one or more SSBs corresponding to different SSB indices and / or one or more CSI-RSs corresponding to different CSI-RS IDs.

[0135] In the above embodiment, the first module may further send a measurement report of the first reference signal of the first downlink carrier and / or the second downlink carrier.

[0136] In some embodiments, the measurement report of the first reference signal includes one or more reference signal indexes and / or one or more measurement results (e.g., RSRP, RSRQ, SINR) corresponding to the reference signal indexes. For example, the first reference signal includes an SSB and a CSI-RS, and the measurement report of the first reference signal includes one or more SSB indexes and / or one or more CSI-RS IDs, and / or the measurement results corresponding to the SSB indexes and / or the CSI-RS IDs (e.g., one or more of RSRP, RSRQ, and SINR). For another example, the first reference signal includes an SSB, and the measurement report of the first reference signal includes one or more SSB indexes, and / or the measurement results corresponding to the one or more SSB indexes (e.g., one or more of RSRP, RSRQ, and SINR). For another example, the first reference signal includes one or more CSI-RS, and the measurement report of the first reference signal includes one or more CSI-RS IDs, and / or the measurement results corresponding to the one or more CSI-RS IDs (e.g., one or more of RSRP, RSRQ, and SINR).

[0137] In some embodiments, the first module may send a second reference signal, such as an SRS, on the aforementioned first uplink carrier and / or second uplink carrier.

[0138] Figure 10 is a schematic diagram of the first to sixth beams. In this example, it is assumed that the repeater uses the same transmit and receive beams for the same device and that the same antenna panel is used on the network side. As shown in Figure 10, the repeater communicates with the first network device via the first beam and / or the second beam, for example, using the first beam to receive a signal from the first network device in the first frequency band, or using the second beam to send a signal to the first network device in the first frequency band. In addition, the repeater communicates with the second network device via the third beam and / or the fourth beam, for example, using the third beam to receive a signal from the second network device in the second frequency band (for example, receiving the third signal), or using the fourth beam to send a signal to the second network device in the second frequency band (for example, sending the processed fourth signal). In addition, the repeater also communicates with the terminal device via the fifth beam and / or the sixth beam, for example, using the fifth beam to send a signal to the terminal device in the second frequency band (for example, sending the processed third signal), or using the sixth beam to receive a signal from the terminal device in the second frequency band (for example, receiving the fourth signal).

[0139] Figure 11 is another schematic diagram of the first to sixth beams. Unlike the example in Figure 10, in this example, different antenna panels are used on the network side. The use of each beam is similar to that in Figure 10, and the description is omitted here.

[0140] Figure 12 is another schematic diagram of the first to sixth beams. In this example, it is assumed that the repeater has different transmit and receive beams for the same device, and the same antenna panel is used on the network side. As shown in Figure 12, the repeater communicates with the first network device through the first beam and the second beam, for example, using the first beam to receive a signal from the first network device in the first frequency band, and using the second beam to send a signal to the first network device in the first frequency band. In addition, the repeater communicates with the second network device through the third beam and the fourth beam, for example, using the third beam to receive a signal from the second network device in the second frequency band (for example, receiving the third signal), and using the fourth beam to send a signal to the second network device in the second frequency band (for example, sending the processed fourth signal). In addition, the repeater also communicates with the terminal device through the fifth beam and the sixth beam, for example, using the fifth beam to send a signal to the terminal device in the second frequency band (for example, sending the processed third signal), and using the sixth beam to receive a signal from the terminal device in the second frequency band (for example, receiving the fourth signal).

[0141] Figure 13 is another schematic diagram of the first to sixth beams. Unlike the example in Figure 12, in this example, the network side uses different antenna panels. The use of each beam is similar to that in Figure 12, and the description is omitted here.

[0142] In the aforementioned embodiments, the first frequency band and the second frequency band refer to operating bands or passbands, but the present application is not limited thereto.

[0143] In the embodiment of the present application, the carrier of the MT receiving signal (downlink carrier) and / or the carrier of the MT sending signal (uplink carrier) of the repeater is called the carrier of the MT of the repeater. The carrier of the MT of the repeater includes one or more carriers.

[0144] In the embodiments of the present application, a plurality refers to more than one, or two or more.

[0145] In some embodiments, the carrier of the MT of the repeater is not within the frequency band (or passband or carrier) of the forwarding module of the repeater. That is, the forwarding module of the repeater does not forward the signal (RF signal) on the carrier of the MT of the repeater.

[0146] In some embodiments, at least one carrier of the MT of the repeater is within the frequency band (or passband or carrier) of the forwarding module of the repeater. That is, the forwarding module of the repeater forwards the signal (RF signal) on at least one carrier of the MT of the repeater.

[0147] In some embodiments, at least one carrier of the MT of the repeater is within the frequency band (or passband or carrier) of the forwarding module of the repeater, and at least one carrier of the MT of the repeater is not within the frequency band (or passband or carrier) of the forwarding module of the repeater. In other words, the forwarding module of the repeater forwards the signal (RF signal) on the at least one carrier of the MT of the repeater, and the forwarding module of the repeater does not forward the signal (RF signal) on the at least one carrier of the MT of the repeater.

[0148] In the aforementioned embodiments, the frequency band (or passband or carrier) of the forwarding module of the repeater refers to the frequency band (or passband or carrier) of the signals forwarded by the forwarding module of the repeater, or in other words, the operating band of the forwarding module of the repeater. The frequency band (or passband or carrier) of the forwarding module of the repeater includes one or more frequency bands (or passbands or carriers).

[0149] In some embodiments, the repeater (MT or forwarding module) does not receive a physical control channel (e.g., PDCCH) and / or a physical data channel (e.g., PDSCH) on the second downlink carrier. For example, the repeater only receives SSB and / or CSI-RS on the second downlink carrier.

[0150] In some embodiments, the repeater (MT or forwarding module) does not transmit a physical control channel (eg, PUCCH) and / or a physical data channel (eg, PUSCH) on the second uplink carrier. For example, the repeater only receives PRACH and / or SRS on the second uplink carrier.

[0151] In some embodiments, the repeater sends capability information to the network device, where the capability information is used to indicate the working frequency band supported by the MT and / or forwarding module of the repeater, and / or the number of TAGs (timing advance groups) supported by the MT of the repeater, and / or whether the MT of the repeater supports carrier aggregation, and / or the maximum number of carriers supported by the MT of the repeater, and / or whether the forwarding module of the repeater can receive signals.

[0152] In some embodiments, the repeater sends beam / antenna capability information to the network device, such as the number of beams supported by the network device side of the repeater (or B-link and C-link), the number of beams supported by the terminal device side of the repeater (or A-link), the number of beams supported by the B-link of the repeater, and the number of ports supported by the C-link (or MT) of the repeater.

[0153] The method of the embodiment of the present application is described below with reference to specific examples.

[0154] FIG14 is a schematic diagram of an example of a repeater receiving a signal according to a method according to an embodiment of the present application.

[0155] As shown in Figure 14, in this example, the carrier of the MT of the repeater (first downlink carrier C1) is not within the frequency band of the forwarding module of the repeater (second frequency band B2). The first module of the repeater (NCR-MT) receives signals on the first downlink carrier C1 of the first frequency band, such as one or more of the SSB, CSI-RS, PDCCH, PDSCH, etc. The forwarding module of the repeater (NCR-Fwd) forwards signals in the second frequency band B2.

[0156] FIG15 is a schematic diagram of another example of a repeater receiving a signal according to a method according to an embodiment of the present application.

[0157] As shown in Figure 15, in this example, the repeater receives signals on two or more carriers in the first frequency band and / or the second frequency band. The two carriers are referred to as the first downlink carrier C1 and the second downlink carrier C2. The MT of the repeater receives signals on the first downlink carrier C1, for example, one or more of the SSB, CSI-RS, PDCCH, PDSCH, etc.

[0158] In addition, for the second downlink carrier C2, in some cases, the MT (NCR-MT) of the repeater receives signals on the second downlink carrier C2, such as receiving SSB and / or CSI-RS, that is, at least one carrier (first downlink carrier C1) of the MT of the repeater is not within the frequency band (second frequency band B2) of the forwarding module of the repeater, and at least one carrier (second downlink carrier C2) is within the frequency band (second frequency band B2) of the forwarding module of the repeater; in other cases, the forwarding module (NCR-Fwd) of the repeater receives signals on the second downlink carrier C2, such as receiving SSB and / or CSI-RS, that is, the carrier (first downlink carrier C1) of the MT of the repeater is not within the frequency band (second frequency band B2) of the forwarding module of the repeater, and the forwarding module of the repeater receives signals from the carrier (second downlink carrier C2) within its frequency band (second frequency band B2).

[0159] In the above example, the first downlink carrier C1 and / or the second downlink carrier C2 are subordinate to or not subordinate to a cell, for example, the first downlink carrier C1 is subordinate to a cell, and the second downlink carrier C2 is not subordinate to a cell. In the case where the first downlink carrier C1 and the second downlink carrier C2 are subordinate to a cell, the first downlink carrier C1 and the second downlink carrier C2 belong to the same cell or different cells. In Figures 12 and 13, it is assumed that the first downlink carrier C1 and the second downlink carrier C2 belong to different cells, and the first downlink carrier C1 belongs to, for example, a Pcell (that is, the first downlink carrier C1 is the downlink carrier of the Pcell), and the second downlink carrier C2 belongs to, for example, a PScell ​​or an Scell ​​(that is, the second downlink carrier C2 is the downlink carrier of the PScell ​​or the Scell), but the present application is not limited thereto.

[0160] FIG16 is a schematic diagram of an example of a repeater sending a signal according to a method according to an embodiment of the present application.

[0161] As shown in Figure 16, in this example, the carrier of the MT of the repeater (first uplink carrier C3) is not within the frequency band of the forwarding module of the repeater (second frequency band B2). The first module of the repeater (NCR-MT) transmits signals on the first uplink carrier C3, such as one or more of the PRACH, SRS, PUCCH, PUSCH, etc. The forwarding module of the repeater (NCR-Fwd) forwards the signals in the second frequency band B2.

[0162] From the perspective of center frequency and / or the cell to which they belong, the first uplink carrier C3 and the first downlink carrier C1 are the same or different. That is, the first uplink carrier C3 and the first downlink carrier C1 can be the uplink carrier and downlink carrier of the same cell (e.g., Pcell), respectively. Both can be TDD or FDD.

[0163] FIG17 is a schematic diagram of another example of a repeater sending a signal according to a method according to an embodiment of the present application.

[0164] As shown in Figure 17, the repeater transmits signals on two or more carriers in the first frequency band and / or the second frequency band, where the two carriers are referred to as the first uplink carrier C3 and the second uplink carrier C4, respectively. The MT of the repeater transmits signals on the first uplink carrier C3, such as one or more of the PRACH, SRS, PUCCH, and PUSCH.

[0165] For the second uplink carrier C4, in some cases, the MT (NCR-MT) of the repeater sends signals on the second uplink carrier C4, such as sending PRACH and / or SRS, etc., that is, at least one carrier (first uplink carrier C3) of the MT of the repeater is not within the frequency band (second frequency band B2) of the forwarding module of the repeater, and at least one carrier (second uplink carrier C4) is within the frequency band (second frequency band B2) of the forwarding module of the repeater; in other cases, the forwarding module (NCR-Fwd) of the repeater sends signals on the second uplink carrier C4, such as sending PRACH and / or SRS, etc., that is, the carrier (first uplink carrier C3) of the MT of the repeater is not within the frequency band (second frequency band B2) of the forwarding module of the repeater, and the forwarding module of the repeater sends signals on the carrier (second uplink carrier C4) within its frequency band (second frequency band B2).

[0166] From the perspective of axial frequency and / or cell affiliation, the first uplink carrier C3 is the same as or different from the first downlink carrier C1, and the second uplink carrier C4 is the same as or different from the second downlink carrier C2. That is, the first uplink carrier C3 and the first downlink carrier C1 can be the uplink carrier and downlink carrier, respectively, of the same cell (e.g., PCell). Both can use TDD or FDD. The second uplink carrier C4 and the second downlink carrier C2 can be the uplink carrier and downlink carrier, respectively, of the same cell (e.g., PScell / Scell). Both can use TDD or FDD.

[0167] In the above example, the first downlink carrier C1 and / or the second downlink carrier C2 and / or the first uplink carrier C3 and / or the second uplink carrier C4 belong to or do not belong to a cell. In the case that the first downlink carrier C1 and the second downlink carrier C2 belong to a cell, the first downlink carrier C1 and the second downlink carrier C2 belong to the same or different cells. In the case that the first uplink carrier C3 and the second uplink carrier C4 belong to a cell, the first uplink carrier C3 and the second uplink carrier C4 belong to the same or different cells. Wherein, for the case that the first downlink carrier C1 and the second downlink carrier C2 belong to the same cell, for example, the first downlink carrier C1 is the NDL carrier of the cell, and the second downlink carrier C2 is the SDL carrier of the cell, or vice versa; for the case that the first uplink carrier C3 and the second uplink carrier C4 belong to the same cell, for example, the first uplink carrier C3 is the NUL carrier of the cell, and the second uplink carrier C4 is the SUL carrier of the cell, or vice versa.

[0168] In the above example, it is assumed that the first downlink carrier C1 / the first uplink carrier C3 and the second downlink carrier C2 / the second uplink carrier C4 belong to different cells. For example, the first downlink carrier C1 / the first uplink carrier C3 belong to a Pcell, and the second downlink carrier C2 / the second uplink carrier C4 belong to a PScell ​​or an Scell, but the present application is not limited thereto.

[0169] In the examples of FIG. 14 to FIG. 17 , in some implementations, the first module receives a signal in a downlink BWP of a downlink carrier and / or sends a signal in an uplink BWP of an uplink carrier, but the present application is not limited thereto.

[0170] FIG18 is a schematic diagram of an example of a repeater forwarding a signal according to a method according to an embodiment of the present application.

[0171] As shown in Figure 18, the forwarder 181 can send the beam / antenna-related capability information of the backhaul link (A-link) to the first network device 182, receive the SSB and / or CSI-RS from the second network device 183 on the second downlink carrier, send a measurement report on the second downlink carrier to the first network device 182, and / or send an SRS to the second network device 183 on the second uplink carrier, and then determine the beam (third beam and / or fourth beam) adopted by the backhaul link (B-link) based on the corresponding beam indication information received from the first network device 182.

[0172] In addition, the repeater 181 can send beam / antenna-related capability information of the control link (C-link) to the first network device 182, receive SSB and / or CSI-RS from the first network device 182 on the first downlink carrier, send a measurement report on the second downlink carrier to the first network device 182, and / or send SRS to the first network device 182 on the first uplink carrier, and then determine the beam (first beam and / or second beam) adopted by the control link (C-link) based on the corresponding beam indication information received from the first network device 182.

[0173] In addition, the repeater 181 can send beam / antenna-related capability information of the control link (A-link) to the first network device 182, determine the identification of the beam of the control link (A-link), and then determine the beam (first beam and / or second beam) adopted by the control link (A-link) based on the corresponding beam indication information received from the first network device 182.

[0174] In an embodiment of the present application, the first module obtains the beam indication, or the first module receives the beam indication. The present application does not limit the acquisition method and the receiving method.

[0175] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0176] The above only describes the steps or processes related to the present application, but the present application is not limited thereto. The method of the embodiment of the present application may also include other steps or processes. For the specific content of these steps or processes, reference may be made to the relevant art.

[0177] In the embodiments of the present application, the repeater can be a repeater, a radio frequency repeater, a radio frequency repeater, a repeater node, a repeater node, a repeater node, an intelligent repeater, an intelligent repeater, an intelligent repeater node, an intelligent repeater node, an intelligent repeater node, etc., but the present application is not limited to this and can also be other devices.

[0178] According to the method of the embodiment of the present application, by obtaining the first beam indication and / or the second beam indication, communication (information interaction) between the repeater and the base station (first network device) can be achieved. In addition, by obtaining the third beam indication and / or the fourth beam indication, the repeater can forward the signal between the base station (second network device) and the terminal device.

[0179] Embodiments of the second aspect

[0180] An embodiment of the present application provides a communication device, which may be, for example, a repeater, or may be one or more components or assemblies configured in the repeater.

[0181] Figure 19 is a schematic diagram of a communication device according to an embodiment of the present application. Since the principle of solving the problem by this device is the same as the method of the embodiment of the first aspect, its specific implementation can refer to the implementation of the method of the embodiment of the first aspect, and the same contents will not be repeated.

[0182] As shown in FIG. 19 , the communication device 1900 according to an embodiment of the present application includes a first module 1901 and a second module 1902 .

[0183] In an embodiment of the present application, the first module 1901 obtains a first beam indication, which is at least used for the first module 1901 to receive a signal from a first network device in a first frequency band, and / or the first module 1901 obtains a second beam indication, which is at least used for the first module 1901 to send a signal to the first network device in the first frequency band; in addition, the first module 1901 further obtains a third beam indication, which is at least used for the second module 1902 to receive a third signal from a second network device in a second frequency band, the third signal being forwarded; and / or the first module 1901 obtains a fourth beam indication, which is at least used for the second module 1902 to forward a processed fourth signal from a terminal device to the second network device in the second frequency band. In this embodiment of the present application, the first frequency band and the second frequency band do not overlap in the frequency domain.

[0184] In some embodiments, the third beam indication is also used for the first module 1901 to receive a signal from the second network device in the second frequency band, and / or the fourth beam indication is also used for the first module 1901 to send a signal to the second network device in the second frequency band.

[0185] In some embodiments, the first module 1901 also obtains a fifth beam indication, which is at least used for the second module 1902 to send the processed third signal in the second frequency band; and / or, the first module 1901 also obtains a sixth beam indication, which is at least used for the second module 1902 to receive the fourth signal in the second frequency band.

[0186] In some embodiments, the first to sixth beam indications include at least information related to the beam and / or the spatial filter and / or the reference signal, where the information includes at least one of the following information:

[0187] spatial filter index and / or beam index;

[0188] Reference signal index;

[0189] Number of antenna ports for reference signals;

[0190] Antenna polarization information;

[0191] Beamwidth information; and

[0192] Beam direction information.

[0193] In some embodiments, the number of antenna ports of the reference signal is 1 or 2.

[0194] In some embodiments, the antenna polarization information includes single polarization or multi-polarization.

[0195] In some embodiments, the beam width information includes the number of antenna ports in a first dimension and the number of antenna ports in a second dimension.

[0196] In some embodiments, the beam direction information includes a codebook index.

[0197] In some embodiments, the codebook index corresponds to an exit angle or an antenna transmission phase.

[0198] In some embodiments, each beam indication is used at least for the first module or the second module to send and / or receive signals, which means that the first module or the second module uses a spatial filter corresponding to each beam indication to send and / or receive signals.

[0199] In some embodiments, the first to sixth beam indications are carried by dynamic signaling or semi-static signaling.

[0200] In some embodiments, the dynamic signaling is downlink control information DCI or physical downlink control channel PDCCH.

[0201] In some embodiments, the above-mentioned semi-static signaling is MAC CE signaling or RRC signaling.

[0202] In some embodiments, the first frequency band is within a first frequency range, and the second frequency band is within a second frequency range.

[0203] In some embodiments, the first network device and the second network device are the same or different.

[0204] In some embodiments, the subcarrier spacings of the first frequency band and the second frequency band are different.

[0205] In some embodiments, the first frequency band includes a first carrier, and the first carrier includes a first downlink carrier and / or a first uplink carrier.

[0206] In some embodiments, the first uplink carrier and the first downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

[0207] In some embodiments, the second frequency band includes a second carrier, and the second carrier includes a second downlink carrier and / or a second uplink carrier.

[0208] In some embodiments, the second uplink carrier and the second downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

[0209] In some embodiments, the subcarrier spacings of the first downlink carrier and the second downlink carrier are different.

[0210] In some embodiments, the subcarrier spacings of the first uplink carrier and the second uplink carrier are different.

[0211] In some embodiments, the first module 1901 also receives and / or transmits signals in a second frequency band.

[0212] In some embodiments, the first module 1901 receives a first reference signal on a first downlink carrier and / or a second downlink carrier.

[0213] In some embodiments, the first module 1901 further sends a measurement report of the first reference signal of the first downlink carrier and / or the second downlink carrier.

[0214] In some embodiments, the first module 1901 sends a second reference signal on the first uplink carrier and / or the second uplink carrier.

[0215] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0216] In the embodiments of the present application, the repeater can be a repeater, a radio frequency repeater, a radio frequency repeater, a repeater node, a repeater node, a repeater node, an intelligent repeater, an intelligent repeater, an intelligent repeater node, an intelligent repeater node, an intelligent repeater node, etc., but the present application is not limited to this and can also be other devices.

[0217] According to the apparatus of the embodiment of the present application, by obtaining the first beam indication and / or the second beam indication, communication (information interaction) between the repeater and the base station (first network device) can be achieved. In addition, by obtaining the third beam indication and / or the fourth beam indication, the repeater can forward the signal between the base station (second network device) and the terminal device.

[0218] Embodiments of the third aspect

[0219] An embodiment of the present application provides a communication system, which includes a network device, a repeater, and a terminal device.

[0220] In the embodiments of the present application, existing services or future services can be transmitted between the network device and the terminal device. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable low-latency communication (URLLC), and vehicle-to-everything (V2X) communication, etc.

[0221] In an embodiment of the present application, the network device is configured to send signals to a repeater (NCR-MT) and / or receive signals from a repeater (NCR-MT); and / or, the network device is configured to send signals to a terminal device through a repeater (NCR-Fwd) and / or receive signals from a terminal device through a repeater (NCR-Fwd); the repeater is configured to execute the method described in the embodiment of the first aspect, the contents of which are incorporated herein and will not be repeated here.

[0222] An embodiment of the present application also provides a repeater, which can be, for example, a repeater, a radio frequency repeater, a radio frequency repeater, a repeater node, a repeater node, a repeater node, an intelligent repeater, an intelligent repeater, an intelligent repeater node, an intelligent repeater node, an intelligent repeater node, etc., but the present application is not limited to this and can also be other devices.

[0223] Figure 20 is a schematic diagram of a transponder according to an embodiment of the present application. As shown in Figure 20 , transponder 2000 may include a processor 2010 and a memory 2020. Memory 2020 stores data and programs 2030 and is coupled to processor 2010. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunications or other functions.

[0224] For example, the processor 2010 may be configured to execute a program to implement the method described in the embodiment of the first aspect.

[0225] As shown in Figure 20, the transponder 2000 may also include: a network-side transceiver 2040-1 and a network-side antenna 2050-1, a terminal-side transceiver 2040-2 and a terminal-side antenna 2050-2, and a signal amplification circuit 2060; the functions of these components are similar to those in the prior art and are not described here. It is worth noting that the transponder 2000 does not necessarily include all of the components shown in Figure 20; in addition, the transponder 2000 may also include components not shown in Figure 20, for which reference may be made to the prior art.

[0226] An embodiment of the present application also provides a network device.

[0227] Figure 21 is a schematic diagram of a network device according to an embodiment of the present application. As shown in Figure 21 , network device 2100 may include a central processing unit (CPU) 2101 and a memory 2102 ; the memory 2102 is coupled to the CPU 2101. The memory 2102 may store various data and information processing programs, which are executed under the control of the CPU 2101 to receive various information sent by terminal devices and send various information to the terminal devices.

[0228] For example, the processor 2101 may be configured to execute a program to send signals to and / or receive signals from the MT of the repeater. The interaction between the network device and the repeater has been described in detail in the previous embodiments and will not be repeated here.

[0229] In addition, as shown in Figure 21, network device 2100 may also include: a transceiver 2103 and an antenna 2104; wherein, the functions of the above components are similar to those in the prior art and are not described here in detail. It is worth noting that network device 2100 does not necessarily include all the components shown in Figure 21; in addition, network device 2100 may also include components not shown in Figure 21, and reference may be made to the prior art.

[0230] The present application also provides a network device. The network device includes a transmitting unit configured to transmit a signal to a mobile terminal of a repeater, and / or a receiving unit configured to receive a signal from the mobile terminal of the repeater. The relevant details regarding the network device have been described in the aforementioned embodiments and are incorporated herein and will not be further elaborated upon.

[0231] An embodiment of the present application further provides a computer-readable program, wherein when the program is executed in a repeater, the program causes a computer to execute the method described in the embodiment of the first aspect in the repeater.

[0232] An embodiment of the present application further provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the embodiment of the first aspect in a repeater.

[0233] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The logic component is, for example, a field programmable logic component, a microprocessor, a processor used in a computer, etc. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0234] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0235] The software module may be located in 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. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0236] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0237] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0238] Regarding the above implementation methods disclosed in this embodiment, the following additional notes are also disclosed:

[0239] 1. A communication method, wherein the method comprises:

[0240] The first module of the repeater obtains a first beam indication, where the first beam indication is at least used by the first module to receive a signal from a first network device in a first frequency band, and / or the first module of the repeater obtains a second beam indication, where the second beam indication is at least used by the first module to send a signal to the first network device in the first frequency band;

[0241] The first module obtains a third beam indication, where the third beam indication is at least used by the second module of the repeater to receive a third signal from the second network device in the second frequency band, where the third signal is used to be forwarded; and / or the first module obtains a fourth beam indication, where the fourth beam indication is at least used by the second module to forward a processed fourth signal from the terminal device to the second network device in the second frequency band;

[0242] The first frequency band and the second frequency band do not overlap in the frequency domain.

[0243] 2. The method according to Note 1, wherein the third beam indication is also used for the first module to receive signals from the second network device in the second frequency band, and / or the fourth beam indication is also used for the first module to send signals to the second network device in the second frequency band.

[0244] 3. The method according to any one of Notes 1-2, wherein the method further comprises:

[0245] The first module obtains a fifth beam indication, which is at least used for the second module to send the processed third signal in the second frequency band; and or the first module obtains a sixth beam indication, which is at least used for the second module to receive the fourth signal in the second frequency band.

[0246] 4. The method according to any one of Notes 1 to 3, wherein the first to sixth beam indications include at least information related to the beam and / or the spatial filter and / or the reference signal, and the information includes at least one of the following information:

[0247] spatial filter index and / or beam index;

[0248] Reference signal index;

[0249] Number of antenna ports for reference signals;

[0250] Antenna polarization information;

[0251] Beamwidth information; and

[0252] Beam direction information.

[0253] 5. The method according to Supplement 4, wherein:

[0254] The number of antenna ports of the reference signal is 1 or 2.

[0255] 6. The method according to any one of Notes 4-5, wherein:

[0256] The antenna polarization information includes single polarization or multi-polarization.

[0257] 7. The method according to any one of Notes 4 to 6, wherein:

[0258] The beam width information includes the number of antenna ports in a first dimension and the number of antenna ports in a second dimension.

[0259] 8. The method according to any one of Notes 4 to 7, wherein:

[0260] The beam direction information includes a codebook index.

[0261] 9. The method according to any one of Notes 4 to 8, wherein:

[0262] The codebook index corresponds to an exit angle or an antenna transmission phase.

[0263] 10. The method according to any one of Notes 1 to 9, wherein each beam indication is used at least for the first module or the second module to transmit a signal and / or receive a signal,

[0264] The first module or the second module transmits a signal and / or receives a signal using a spatial filter corresponding to the beam indication.

[0265] 11. The method according to any one of Notes 1-10, wherein the first to sixth beam indications are carried by dynamic signaling or semi-static signaling.

[0266] 12. The method according to Note 11, wherein the dynamic signaling is downlink control information DCI or physical downlink control channel PDCCH.

[0267] 13. The method according to any one of Notes 11-12, wherein the semi-static signaling is MAC CE signaling or RRC signaling.

[0268] 14. The method according to any one of Notes 1-13, wherein the first frequency band is within a first frequency range, and the second frequency band is within a second frequency range.

[0269] 15. The method according to any one of Notes 1-14, wherein the first network device and the second network device are the same or different.

[0270] 16. The method according to any one of Notes 1-15, wherein the subcarrier spacing of the first frequency band and the second frequency band is different.

[0271] 17. The method according to any one of Notes 1-16, wherein the first frequency band includes a first carrier, and the first carrier includes a first downlink carrier and / or a first uplink carrier.

[0272] 18. The method according to Note 17, wherein the first uplink carrier and the first downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

[0273] 19. The method according to any one of Notes 1-18, wherein the second frequency band includes a second carrier, and the second carrier includes a second downlink carrier and / or a second uplink carrier.

[0274] 20. The method according to Note 19, wherein the second uplink carrier and the second downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

[0275] 21. The method according to any one of Notes 17-20, wherein the subcarrier spacing of the first downlink carrier and the second downlink carrier is different.

[0276] 22. The method according to any one of Notes 17-21, wherein the subcarrier spacing of the first uplink carrier and the second uplink carrier is different.

[0277] 23. The method according to any one of Notes 1 to 22, wherein the method further comprises:

[0278] The first module receives and / or transmits signals in the second frequency band.

[0279] 24. The method according to any one of Notes 17 to 23, further comprising:

[0280] The first module receives a first reference signal on the first downlink carrier and / or the second downlink carrier.

[0281] 25. The method according to any one of Notes 17 to 24, further comprising:

[0282] The first module sends a measurement report of the first reference signal of the first downlink carrier and / or the second downlink carrier.

[0283] 26. The method according to any one of Notes 17 to 25, wherein the method further comprises:

[0284] The first module sends a second reference signal on the first uplink carrier and / or the second uplink carrier.

[0285] 27. A repeater comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method as described in any one of Notes 1 to 26.

[0286] 28. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to send a signal to a MT of a repeater and / or receive a signal from the MT of the repeater.

[0287] 29. A communication system comprising a network device, a terminal device and a repeater, wherein:

[0288] The network device is configured to send a signal to the repeater (NCR-MT) and / or receive a signal from the repeater (NCR-MT); and / or, the network device is configured to send a signal to the terminal device through the repeater (NCR-Fwd) and / or receive a signal from the terminal device through the repeater (NCR-Fwd);

[0289] The repeater is configured to perform the method described in any one of Notes 1 to 26.

Claims

1. A communication device, wherein: The device comprises: The first module of the repeater obtains a first beam indication, where the first beam indication is at least used by the first module to receive a signal from a first network device in a first frequency band, and / or the first module of the repeater obtains a second beam indication, where the second beam indication is at least used by the first module to send a signal to the first network device in the first frequency band; The first module obtains a third beam indication, where the third beam indication is at least used by the second module of the repeater to receive a third signal from the second network device in the second frequency band, where the third signal is used to be forwarded; and / or the first module obtains a fourth beam indication, where the fourth beam indication is at least used by the second module to forward a processed fourth signal from the terminal device to the second network device in the second frequency band; The first frequency band and the second frequency band do not overlap in the frequency domain.

2. The device according to claim 1, wherein The third beam indication is further used by the first module to receive a signal from the second network device in the second frequency band, and / or the fourth beam indication is further used by the first module to send a signal to the second network device in the second frequency band.

3. The device according to claim 1, wherein The device further comprises: The first module obtains a fifth beam indication, which is at least used for the second module to send the processed third signal in the second frequency band; and or the first module obtains a sixth beam indication, which is at least used for the second module to receive the fourth signal in the second frequency band.

4. The device according to claim 1, wherein The first to fourth beam indications include at least information related to the beam and / or the spatial filter and / or the reference signal, where the information includes at least one of the following information: spatial filter index and / or beam index; Reference signal index; Number of antenna ports for reference signals; Antenna polarization information; Beamwidth information; and Beam direction information.

5. The device according to claim 1, wherein Each beam indication is used at least for the first module or the second module to send a signal and / or receive a signal, which means that: The first module or the second module transmits a signal and / or receives a signal using a spatial filter corresponding to the beam indication.

6. The device according to claim 1, wherein The first to fourth beam indications are carried by dynamic signaling or semi-static signaling.

7. The device according to claim 6, wherein The dynamic signaling is downlink control information DCI or physical downlink control channel PDCCH.

8. The device according to claim 6, wherein The semi-static signaling is MAC CE signaling or RRC signaling.

9. The device according to claim 1, wherein The subcarrier spacings of the first frequency band and the second frequency band are different.

10. The device according to claim 1, wherein The first frequency band includes a first carrier, and the first carrier includes a first downlink carrier and / or a first uplink carrier.

11. The device according to claim 10, wherein The first uplink carrier and the first downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

12. The device according to claim 1, wherein The second frequency band includes a second carrier, and the second carrier includes a second downlink carrier and / or a second uplink carrier.

13. The device according to claim 12, wherein The second uplink carrier and the second downlink carrier are located at the same position in the frequency domain or do not overlap in the frequency domain.

14. The device according to claim 10, wherein The first downlink carrier and the second downlink carrier have different subcarrier spacings.

15. The device according to claim 1, wherein The first module receives and / or transmits signals in the second frequency band.

16. The device according to claim 10, wherein The first module receives a first reference signal on the first downlink carrier and / or the second downlink carrier.

17. The device according to claim 10, wherein The first module sends a measurement report of the first reference signal of the first downlink carrier and / or the second downlink carrier.

18. The device according to claim 10, wherein The first module sends a second reference signal on the first uplink carrier and / or the second uplink carrier.

19. A network device, comprising: a sending unit, configured to send a signal to a mobile terminal of the repeater, and / or The receiving unit is configured to receive a signal from the mobile terminal of the repeater.

20. A communication system comprising a network device, a terminal device and a repeater, wherein: The network device is configured to send signals to the repeater and / or receive signals from the repeater; and / or, the network device is configured to send a signal to the terminal device via the repeater and / or receive a signal from the terminal device via the repeater; The forwarder is configured to: Acquire, through the first module, a first beam indication, where the first beam indication is at least used by the first module to receive a signal from a first network device in a first frequency band; and / or acquire, through the first module, a second beam indication, where the second beam indication is at least used by the first module to send a signal to the first network device in the first frequency band; Acquire, through the first module, a third beam indication, where the third beam indication is at least used by the second module to receive, at the second frequency band, a third signal from the second network device, where the third signal is to be forwarded; and / or acquire, through the first module, a fourth beam indication, where the fourth beam indication is at least used by the second module to forward, at the second frequency band, a processed fourth signal from the terminal device to the second network device; The first frequency band and the second frequency band do not overlap in the frequency domain.

Images