First device, second device and wireless communication method

Abstract

Disclosed in an embodiment of the present application are a first device, a second device and a wireless communication method, the wireless communication method being applied to the first device, the wireless communication method comprising: on a first frequency band, receiving synchronization signal transmission configuration information sent by the second device, the first frequency band being lower than a millimeter wave frequency band, the second device and the at least one first device form a domain, and the second device is used for managing communication of the at least one device in the domain; and transmitting the synchronization signal on the millimeter wave frequency band according to the synchronization signal transmission configuration information.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of communication technologies, and particularly relates to a first device, a second device, and a wireless communication method. Background Art

[0002] With the large-scale commercial deployment of 5G networks, a large number of applications and services that require high-speed, low-latency, and highly reliable wireless connections have emerged. For example, intelligent manufacturing, smart homes, virtual reality (VR) / augmented reality (AR) / extended reality (XR), and industrial Internet 4.0, etc. However, for the wireless short-range communication system standard, it can provide wireless transmission capabilities for short-range service requirements in the unlicensed frequency band, but it cannot meet the high-speed data transmission requirements. Summary of the Invention

[0003] Embodiments of this application provide at least a first device, a second device, and a wireless communication method.

[0004] The technical solution of the embodiments of this application is implemented as follows:

[0005] Embodiments of this application provide a first device, which includes: a first transceiver; and

[0006] a first processor, which is coupled to the first transceiver; the first processor is configured to:

[0007] Receive, via the first transceiver, synchronization signal transmission configuration information sent by a second device on a first frequency band, where the first frequency band is lower than the millimeter wave frequency band, the second device and at least one first device form a domain, and the second device is used to manage the communication of at least one device within the domain;

[0008] Transmit a synchronization signal on the millimeter wave frequency band according to the synchronization signal transmission configuration information via the first transceiver.

[0009] In some embodiments, the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information, and the first processor is configured to:

[0010] Receive at least one downlink synchronization signal on the millimeter wave frequency band according to the downlink synchronization transmission configuration information via the first transceiver.

[0011] In some embodiments, the first processor is configured to:

[0012] Measure at least one downlink synchronization signal to obtain a first measurement result, where the first measurement result includes measurement results of at least one transmission beam of a second device, and different transmission beams among the at least one transmission beam of the second device are used to transmit different downlink synchronization signals;

[0013] Transmit the first measurement result to the second device via a first transceiver on a first frequency band; or,

[0014] Determine third indication information indicating an optimal transmission beam according to the first measurement result;

[0015] Transmit the third indication information via a first transceiver on a first frequency band.

[0016] In some embodiments, the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information, and the first processor is configured to:

[0017] Transmit at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information via a first transceiver on a millimeter wave frequency band.

[0018] In some embodiments, the first processor is configured to:

[0019] Receive a second measurement result sent by the second device via a first transceiver on a first frequency band, and select an optimal transmission beam from at least one transmission beam of the first device according to the second measurement result; or,

[0020] Receive first indication information indicating an optimal transmission beam sent by the second device via a first transceiver on a first frequency band;

[0021] The second measurement result includes measurement results of at least one transmission beam of the first device, and different transmission beams among the at least one transmission beam of the first device are used to transmit different uplink synchronization signals.

[0022] In some embodiments, the first processor is configured to:

[0023] Receive system information via a first transceiver on a first frequency band, where the system information includes synchronization signal transmission configuration information.

[0024] In some embodiments, the first processor is configured to:

[0025] Receive channel configuration information via a first transceiver on a first frequency band;

[0026] Enable the millimeter wave transmission function when the channel configuration information includes second indication information indicating the activation of millimeter wave transmission.

[0027] In some embodiments, the channel configuration information is included in an RRC message or system information.

[0028] In some embodiments, the channel configuration information includes at least one of the following:

[0029] Second indication information for indicating whether to activate the millimeter-wave transmission function;

[0030] Idle channel information for indicating an idle channel;

[0031] Activated channel information for indicating an activated channel.

[0032] In some embodiments, the first processor is configured to:

[0033] Receive millimeter-wave transmission capability information on a first frequency band via a first transceiver;

[0034] Perform data communication with a second device on a millimeter-wave frequency band according to the millimeter-wave transmission capability information via the first transceiver.

[0035] In some embodiments, the millimeter-wave transmission capability information includes at least one of the following:

[0036] Maximum bandwidth capability information for indicating the maximum number of consecutive carriers supported on a millimeter-wave frequency band;

[0037] Channel list information for indicating at least one channel set, where different channel sets correspond to different numbers of access carriers;

[0038] Maximum measurement bandwidth capability information for indicating the maximum measurement bandwidth on a millimeter-wave frequency band.

[0039] In some embodiments, the first processor is configured to:

[0040] Determine at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information;

[0041] For each first frame in the at least one first frame, determine at least one second frame in a group of frames corresponding to the first frame on the millimeter-wave frequency band;

[0042] Transmit the synchronization signal on at least one second frame corresponding to each first frame in the at least one first frame on the millimeter-wave frequency band via the first transceiver.

[0043] In some embodiments, the synchronization signal transmission configuration information includes: millimeter-wave synchronization signal transmission indication information; the first processor is configured to:

[0044] Obtain predefined transmission resource information for the first frequency band according to the millimeter-wave synchronization signal transmission indication information;

[0045] Determine a first frame on the first frequency band according to the predefined transmission resource information for the first frequency band and the third frame on the first frequency band, where the third frame is the frame for transmitting millimeter-wave synchronization signal transmission indication information.

[0046] In some embodiments, the synchronization signal transmission configuration information includes: transmission resource information for the first frequency band; the first processor is configured to:

[0047] Determine at least one first frame on the first frequency band according to the transmission resource information for the first frequency band and the third frame on the first frequency band, where the third frame is the frame for transmitting the transmission resource information for the first frequency band.

[0048] In some embodiments, the first processor is configured to:

[0049] Receive millimeter-wave frame indication information on the first frequency band via the first transceiver;

[0050] For each first frame in at least one first frame, determine at least one second frame corresponding to the first frame in a group of frames on the millimeter-wave frequency band corresponding to the first frame according to the millimeter-wave frame indication information.

[0051] An embodiment of the present application provides a second device, which includes a second transceiver; and

[0052] A second processor coupled to the second transceiver; the second processor is configured to:

[0053] Transmit synchronization signal transmission configuration information to the first device on the first frequency band via the second transceiver, where the first frequency band is lower than the millimeter-wave frequency band, the second device and at least one first device form a domain, and the second device is used to manage the communication of at least one device within the domain;

[0054] Transmit synchronization signals on the millimeter-wave frequency band according to the synchronization signal transmission configuration information via the second transceiver.

[0055] In some embodiments, the second processor is configured to:

[0056] Determine whether to activate the millimeter-wave transmission function in the first device according to the service transmission requirement and / or power-saving requirement of the first device;

[0057] Transmit second indication information to the first device on the first frequency band via the second transceiver, where the second indication information is used for whether to activate the millimeter-wave transmission function.

[0058] In some embodiments, the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information, and the second processor is configured to:

[0059] Transmit at least one downlink synchronization signal according to the downlink synchronization transmission configuration information via the second transceiver in the millimeter wave band.

[0060] In some embodiments, the second processor is configured to:

[0061] Receive, via the second transceiver in the first band, a first measurement result sent by a first device, and select an optimal transmission beam from at least one transmission beam of the second device according to the first measurement result; or,

[0062] Receive, via the second transceiver in the first band, third indication information indicating the optimal transmission beam sent by the first device.

[0063] In some embodiments, the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information, and the second processor is configured to:

[0064] Receive at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information via the second transceiver in the millimeter wave band.

[0065] In some embodiments, the second processor is configured to:

[0066] Measure at least one uplink synchronization signal to obtain a second measurement result, where the second measurement result includes measurement results of at least one transmission beam of the first device, and different transmission beams in the at least one transmission beam of the first device are used to transmit different uplink synchronization signals;

[0067] Send the second measurement result to the first device via the second transceiver in the first band.

[0068] In some embodiments, the second processor is configured to:

[0069] Send system information via the second transceiver in the first band, where the system information includes synchronization signal transmission configuration information.

[0070] In some embodiments, the second processor is configured to:

[0071] Send channel configuration information via the second transceiver in the first band;

[0072] Enable the millimeter wave transmission function when the channel configuration information includes second indication information indicating the activation of millimeter wave transmission.

[0073] In some embodiments, the channel configuration information is included in an RRC message or a system message.

[0074] In some embodiments, the channel configuration information includes at least one of the following:

[0075] The second indication information for indicating whether to activate the millimeter-wave transmission function;

[0076] The idle channel information for indicating the idle channels;

[0077] The activated channel information for indicating the activated channels.

[0078] In some embodiments, the second processor is configured to:

[0079] Transmit millimeter-wave transmission capability information on a first frequency band via a second transceiver;

[0080] Perform data communication with a first device on a millimeter-wave frequency band according to the millimeter-wave transmission capability information via the second transceiver.

[0081] The millimeter-wave transmission capability information includes at least one of the following:

[0082] The maximum bandwidth capability information for indicating the maximum number of continuous carriers supported on the millimeter-wave frequency band;

[0083] The channel list information for indicating at least one channel set, wherein different channel sets correspond to different numbers of access carriers;

[0084] The maximum measurement bandwidth capability information for indicating the maximum measurement bandwidth on the millimeter-wave frequency band.

[0085] In some embodiments, the second processor is configured to:

[0086] Determine at least one first frame of the synchronization signal on a first frequency band according to the synchronization signal transmission configuration information;

[0087] For each first frame in the at least one first frame, determine at least one second frame in a group of frames corresponding to the first frame on the millimeter-wave frequency band;

[0088] Transmit the synchronization signal on at least one second frame corresponding to each first frame in the at least one first frame on the millimeter-wave frequency band via the second transceiver.

[0089] In some embodiments, the synchronization signal transmission configuration information includes: millimeter-wave synchronization signal transmission indication information; the second processor is configured to:

[0090] Obtain the predefined transmission resource information for the first frequency band according to the millimeter-wave synchronization signal transmission indication information;

[0091] Determine one first frame on the first frequency band according to the predefined transmission resource information for the first frequency band and a third frame on the first frequency band, where the third frame is the frame for transmitting the millimeter-wave synchronization signal transmission indication information.

[0092] In some embodiments, the synchronization signal transmission configuration information includes: transmission resource information for a first frequency band; the second processor is configured to:

[0093] Determine at least one first frame on the first frequency band according to the transmission resource information for the first frequency band and a third frame on the first frequency band, where the third frame is a frame for transmitting the transmission resource information for the first frequency band.

[0094] In some embodiments, the second processor is configured to:

[0095] For each first frame in at least one first frame, determine at least one second frame corresponding to the first frame in a group of frames on the millimeter wave frequency band corresponding to the first frame according to the millimeter wave frame indication information.

[0096] An embodiment of the present application provides a wireless communication method applied to a first device, including:

[0097] On a first frequency band, receive synchronization signal transmission configuration information sent by a second device, where the first frequency band is lower than the millimeter wave frequency band, the second device and at least one first device form a domain, and the second device is used to manage the communication of at least one device within the domain;

[0098] On the millimeter wave frequency band, perform the transmission of synchronization signals according to the synchronization signal transmission configuration information.

[0099] In an embodiment of the present application, the second device sends synchronization signal transmission configuration information on the first frequency band, and the first device performs the transmission of synchronization signals on the millimeter wave frequency band according to the synchronization signal transmission configuration information. In this way, by transmitting the synchronization signal transmission configuration information on the first frequency band and transmitting the synchronization signals on the millimeter wave frequency band, the initial access of the millimeter wave system is realized based on the first frequency band.

[0100] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the technical solution of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to explain the technical solution of the present application.

[0102] Figure 1 It is an alternative flowchart of the wireless communication method provided by an embodiment of the present application;

[0103] Figure 2 It is an alternative flowchart of the wireless communication method provided by an embodiment of the present application;

[0104] Figure 3An optional flowchart of the wireless communication method provided by the embodiment of the present application;

[0105] Figure 4 A schematic diagram of indicating a millimeter-wave wireless frame by using a bit mapping method provided by the embodiment of the present application;

[0106] Figure 5 A schematic diagram of indicating a millimeter-wave wireless frame by using a method of predefining several Comb-type patterns provided by the embodiment of the present application;

[0107] Figure 6 A schematic diagram of a first method for indicating millimeter-wave transmission resources provided by the embodiment of the present application;

[0108] Figure 7 A schematic diagram of a second method for indicating millimeter-wave transmission resources provided by the embodiment of the present application;

[0109] Figure 8 An optional flowchart of the wireless communication method provided by the embodiment of the present application;

[0110] Figure 9 A schematic diagram of an optional structure of the device provided by the embodiment of the present application. Detailed implementation manners

[0111] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments should not be construed as limitations on the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0112] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0113] It should be noted that the terms "first / second / third" involved in the embodiments of the present application are only used to distinguish similar objects, and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0114] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art in the field to which the embodiments of this application belong. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0115] Embodiments of this application provide a first device, a second device, and a wireless communication method.

[0116] In a first aspect, a wireless communication method provided by an embodiment of this application is applied to a first device. As Figure 1 shown, it includes:

[0117] S101. On a first frequency band, receive synchronization signal transmission configuration information sent by a second device. The first frequency band is lower than the millimeter wave band. The second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain;

[0118] S102. On the millimeter wave band, perform the transmission of synchronization signals according to the synchronization signal transmission configuration information.

[0119] In a second aspect, a wireless communication method provided by an embodiment of this application is applied to a second device. As Figure 2 shown, it includes:

[0120] S201. On a first frequency band, send synchronization signal transmission configuration information to a first device. The first frequency band is lower than the millimeter wave band. The second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain;

[0121] S202. On the millimeter wave band, perform the transmission of synchronization signals according to the synchronization signal transmission configuration information.

[0122] In a third aspect, a wireless communication method provided by an embodiment of this application is applied to a wireless communication system including a first device and a second device. As Figure 3 shown, it includes:

[0123] S301. The second device sends synchronization signal transmission configuration information to the first device on a first frequency band. The first frequency band is lower than the millimeter wave band. The second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain;

[0124] S302. The first device and the second device transmit synchronization signals according to the synchronization signal transmission configuration information in the millimeter wave frequency band.

[0125] Next, Figure 1 , Figure 2 or Figure 3 the wireless communication method shown will be described.

[0126] Here, the millimeter wave frequency band refers to the electromagnetic wave frequency band with a frequency range of 30 gigahertz (GHz) to 300 GHz (corresponding to a wavelength of 1 millimeter to 10 millimeters). The first frequency band is an electromagnetic wave frequency band lower than the millimeter wave frequency band. In one example, the first frequency band can be an electromagnetic wave frequency band of 30 MHz to 3 GHz, corresponding to a wavelength of 10 meters to 10 centimeters.

[0127] In some embodiments, the second device can be a management node, and the first device can be an in-domain device node of the management node, where the first device is within the coverage range of the second device. In some embodiments, the second device can be an authorization (Grant, G) node, and the first device can be a terminal (Terminal, T) node within the signal coverage range of the G node, where the G node can be considered as the management node of the T node.

[0128] In some embodiments, the second device can be a base station, and the first device can be a terminal within the signal coverage range of the base station.

[0129] In some embodiments, the second device sends a system message on the first frequency band, and the system message carries synchronization signal transmission configuration information.

[0130] In some embodiments, the first device accesses the second device based on the first frequency band. It can be understood that the first device establishes a connection with the second device based on the first frequency band. In the embodiments of the present application, when the first device accesses the second device based on the first frequency band, the second device sends synchronization signal transmission configuration information to the first device on the first frequency band.

[0131] The first device accesses relevant configuration information in the second device based on the first frequency band. The information related to the frequency band may include at least one of the following: The current band configuration (currentBandConfig) is used to indicate the channel configuration information of the current frequency band. Among them, the maximum bandwidth cap (maxBandwidthCap) is used to indicate the maximum number of consecutive basic carriers supported on the current operating frequency band, that is, the maximum bandwidth capacity on the current operating frequency band; The carrier channel list configuration (carrierChannelListConf) is used to indicate the set of channel numbers corresponding to one or more carriers that the G node can access on the current operating frequency band within the maxBandwidthCap capability. When this information indicates multiple channel numbers, the multiple carriers on these channels are time and frequency synchronized. The T node can access multiple carriers to communicate with the G node, and the T node can send or receive data from the same application on different carriers.

[0132] Add the configuration information for synchronous signal transmission for millimeter waves to the relevant configuration information in the second device accessed by the first device based on the first frequency band.

[0133] In some embodiments, the synchronous signal transmission configuration information may include the device identifier of the first device, which is used to indicate the device node performing millimeter wave transmission.

[0134] In some embodiments, when there is a service transmission requirement (such as higher data rate transmission), the second device instructs the first device within the domain to start the initial access process on the idle millimeter wave channel, and the second device sends the synchronous signal transmission configuration information to the first device.

[0135] In the embodiments of this application, the synchronous signal transmission configuration information is used to configure the transmission resources for synchronous signals on the millimeter wave frequency band. The first device and the second device perform the transmission of synchronous signals on the millimeter wave frequency band based on the transmission resources configured by the synchronous signal transmission configuration information.

[0136] In the embodiments of this application, the transmission of synchronous signals may include at least one of the following:

[0137] The second device sends an uplink synchronous signal to the first device on the millimeter wave frequency band, and then the first device receives the uplink synchronous signal on the millimeter wave frequency band;

[0138] The first device sends a downlink synchronous signal to the second device on the millimeter wave frequency band, and then the second device receives the downlink synchronous signal on the millimeter wave frequency band.

[0139] Among them, the downlink synchronous signal is used to achieve frequency synchronization, time synchronization, and cell identity recognition between the first device and the second device, providing a basis for subsequent channel estimation, data demodulation, and cell access.

[0140] The uplink synchronization signal is used to achieve time alignment, power equalization, frequency compensation, etc. on the second device side, and avoid interference between multi-user signals.

[0141] In the embodiments of the present application, the first device receives the downlink synchronization signal, performs frequency synchronization, time synchronization, and cell identity recognition, and measures the downlink synchronization signal to evaluate the signal quality, so that the second device selects the optimal beam to communicate with the first device.

[0142] In the embodiments of the present application, the second device receives the uplink synchronization signal and performs time parameter alignment, frequency parameter alignment, power control, and signal quality evaluation.

[0143] In the embodiments of the present application, the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information and / or downlink synchronization signal transmission configuration information. The uplink synchronization transmission configuration information is used to configure the transmission resources of the uplink synchronization signal, and the downlink synchronization transmission configuration information is used to configure the transmission resources of the downlink synchronization signal.

[0144] In some embodiments, the first device determines the first transmission resources on the first frequency band according to the synchronization signal transmission configuration information, and determines the second transmission resources of the first transmission resources on the millimeter wave frequency band according to the first transmission resources on the first frequency band. The first device and the second device transmit the synchronization signal on the second transmission resources on the millimeter wave frequency band.

[0145] In some embodiments, the synchronization signal can be repeatedly transmitted. Different synchronization signals in the repeatedly transmitted synchronization signals can be transmitted using different beams.

[0146] The millimeter wave frequency band supports multi-beam transmission. For the synchronization signal, a repeated transmission method is adopted, and a flexible beamforming scheme can be used for each transmitted synchronization signal.

[0147] In some embodiments, the synchronization signal transmission configuration information is used to configure at least one of the following information:

[0148] Time domain resources, transmission period, and number of beams.

[0149] In the embodiments of the present application, the second device transmits the synchronization signal transmission configuration information on the first frequency band, and the first device transmits the synchronization signal according to the synchronization signal transmission configuration information on the millimeter wave frequency band. In this way, by transmitting the synchronization signal transmission configuration information on the first frequency band and transmitting the synchronization signal on the millimeter wave frequency band, the synchronization between the first device and the second device is achieved, and thus the initial access of the millimeter wave system is realized based on the first frequency band.

[0150] In some embodiments, the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information. In the millimeter wave band in S102, transmitting the synchronization signal according to the synchronization signal transmission configuration information includes: receiving at least one downlink synchronization signal according to the downlink synchronization transmission configuration information in the millimeter wave band.

[0151] Correspondingly, in the millimeter wave band in S202, transmitting the synchronization signal according to the synchronization signal transmission configuration information includes: transmitting at least one downlink synchronization signal according to the downlink synchronization transmission configuration information in the millimeter wave band.

[0152] The second device transmits at least one downlink synchronization signal in the millimeter wave band, the first device receives at least one downlink synchronization signal in the millimeter wave band, and the first device achieves downlink synchronization based on the received at least one downlink synchronization signal.

[0153] In the embodiments of the present application, the first device may determine the time domain resource for receiving the downlink synchronization signal in the millimeter wave band according to the downlink synchronization transmission configuration information, and receive the downlink synchronization signal based on this time domain resource.

[0154] In the embodiments of the present application, by receiving the downlink synchronization signal in the millimeter wave band, downlink synchronization between the first device and the second device in the millimeter wave band is achieved, so that a complete initial access process can be realized.

[0155] In some embodiments, based on Figure 1 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: measuring the at least one downlink synchronization signal to obtain a first measurement result, where the first measurement result includes the measurement results of at least one transmission beam of the second device, and different transmission beams in the at least one transmission beam of the second device are used to transmit different downlink synchronization signals; or, transmitting third indication information for indicating the optimal transmission beam in the first frequency band;

[0156] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: receiving the first measurement result sent by the first device in the first frequency band, and selecting the optimal transmission beam from the at least one transmission beam of the second device according to the first measurement result; or, receiving the third indication information indicating the optimal transmission beam sent by the first device in the first frequency band.

[0157] Here, the first measurement result is used for the second device to select the optimal beam from the at least one transmission beam of the second device for subsequent data communication.

[0158] The first device receives a downlink synchronization signal, measures the downlink synchronization signal to obtain a first measurement result of the downlink beam quality of the second device, and feeds back the first measurement result to the second device. The first measurement result may include at least one of the following: Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Signal-to-Interference-plus-Noise Ratio (SINR), and Received Signal Strength Indicator (RSSI).

[0159] The second device receives the first measurement result on the first frequency band and selects an optimal downlink beam to communicate with the first device according to the first measurement result.

[0160] In some embodiments, the first device may send third indication information to the second device on the first frequency band. The third indication information may directly indicate the optimal transmission beam of the second device. The second device communicates with the first device according to the optimal transmission beam of the second device indicated by the third indication information.

[0161] In the embodiments of the present application, the first device measures the downlink synchronization signal to obtain a measurement result of at least one transmission beam of the second device, and sends the measurement result to the second device, so that the second device can select an optimal beam according to the measurement result for subsequent data communication, thereby improving communication quality.

[0162] In some embodiments, the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information. Transmitting the synchronization signal according to the synchronization signal transmission configuration information in the millimeter wave band in S101 includes: transmitting at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information in the millimeter wave band.

[0163] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: receiving at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information in the millimeter wave band.

[0164] The first device receives at least one uplink synchronization signal transmission configuration information sent by the second device, and sends at least one uplink synchronization signal on the corresponding millimeter wave band according to the uplink synchronization signal transmission configuration information. The second device achieves uplink synchronization based on the received at least one uplink synchronization signal.

[0165] In the embodiments of the present application, the second device may determine the time-domain resources for receiving the uplink synchronization signal in the millimeter-wave frequency band according to the uplink synchronization transmission configuration information, and receive the uplink synchronization signal based on the time-domain resources.

[0166] In the embodiments of the present application, by transmitting at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information in the millimeter-wave frequency band, uplink synchronization between the first device and the second device is achieved, thereby enabling a complete initial access process.

[0167] In some embodiments, based on Figure 1 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: receiving, on the first frequency band, a second measurement result sent by the second device, and selecting an optimal transmission beam from at least one transmission beam of the first device according to the second measurement result; or, receiving, via the first transceiver on the first frequency band, a first indication information indicating the optimal transmission beam sent by the second device; the second measurement result includes measurement results of at least one transmission beam of the first device, and different transmission beams among the at least one transmission beam of the first device are used to transmit different uplink synchronization signals.

[0168] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: measuring the at least one uplink synchronization signal to obtain a second measurement result; sending the second measurement result to the first device on the first frequency band. Or, sending, on the first frequency band, a first indication information for indicating the optimal transmission beam;

[0169] Here, the second measurement result is used for the first device to select an optimal beam from at least one transmission beam of the first device for subsequent data communication.

[0170] The second device receives the uplink synchronization signal, measures the uplink synchronization signal to obtain a second measurement result of the uplink beam quality of the first device, and feeds back the second measurement result to the first device, where the second measurement result may include at least one of the following: RSRP, RSRQ, SINR, RSSI.

[0171] The first device receives the second measurement result on the first frequency band, and selects an optimal uplink beam to perform data communication with the second device according to the second measurement result.

[0172] In some embodiments, the second device may send first indication information to the first device on a first frequency band, and the first indication information may directly indicate the optimal transmission beam of the first device. The first device performs data communication with the second device according to the optimal transmission beam of the first device indicated by the first indication information.

[0173] In the embodiments of the present application, the second device measures the uplink synchronization signal to obtain the measurement result of at least one transmission beam of the first device, and sends the measurement result to the first device, so that the first device can select the optimal beam according to the measurement result for subsequent data communication, thereby improving the communication quality.

[0174] In some embodiments, based on Figure 1 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: receiving a system message on the first frequency band, where the system message includes the synchronization signal transmission configuration information.

[0175] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: sending a system message on the first frequency band, where the system message includes the synchronization signal transmission configuration information.

[0176] The second device broadcasts a system message within the coverage area of the second device, and the synchronization signal transmission configuration information is carried in the system message.

[0177] The first device receives the system message broadcast by the second device to obtain the synchronization transmission configuration information carried in the system message.

[0178] In some embodiments, the system message may be a system broadcast message, a communication domain system message.

[0179] In one example, the system message includes a System Information Block (SIB) message.

[0180] In the embodiments of the present application, the first device receives the system message carrying the synchronization signal transmission configuration information sent by the second device on the first frequency band, so that the first device performs the transmission of the synchronization signal according to the synchronization signal transmission configuration information, thereby realizing the uplink and downlink synchronization between the first device and the second device.

[0181] Based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: determining whether to activate the millimeter-wave transmission function in the first device according to the service transmission requirement and / or energy-saving requirement of the first device; sending second indication information to the first device on the first frequency band, where the second indication information is used for whether to activate the millimeter-wave transmission function.

[0182] In an embodiment of the present application, the second device determines whether to activate the millimeter-wave transmission function in the first device according to the service requirement and / or energy-saving requirement of the first device, and sends second indication information to the first device.

[0183] The service requirement of the first device can be understood as whether the first device needs high-rate data services. When the first device needs high-rate data services, the second device can activate the millimeter-wave transmission function of the first device to perform high-rate data services through the millimeter-wave frequency band.

[0184] The energy-saving requirement of the first device can be understood as whether the first device needs energy saving. When the first device does not need energy saving, the second device can activate the millimeter-wave transmission function of the first device.

[0185] In an embodiment of the present application, the second device can determine to activate the millimeter-wave transmission function of the first device when it determines that the first device needs high-rate data services and / or does not need energy saving. At this time, the second device sends second indication information indicating the activation of the millimeter-wave transmission function to the first device. When the first device receives the second indication information indicating the activation of the millimeter-wave transmission function, it triggers the activation of its own millimeter-wave transmission function based on the second indication information.

[0186] It can be understood that the second device can determine not to activate the millimeter-wave transmission function of the first device when it determines that the first device does not need high-rate data services or needs energy saving. At this time, the second device sends second indication information indicating not to activate or deactivate the millimeter-wave transmission function to the first device. When the first device receives the second indication information indicating not to activate or deactivate the millimeter-wave transmission function, it triggers the deactivation of its own millimeter-wave transmission function based on the second indication information.

[0187] In an embodiment of the present application, the service requirement of the first device can be determined by the second device or notified by the first device to the second device.

[0188] In one example, the G node serves as a forwarding node for two first devices, the T1 node and the T2 node. When there is a high-rate service requirement between the T1 node and the T2 node, the T1 node or the T2 node notifies the G node of its high-rate service requirement, and the G node can instruct the T1 node and the T2 node to activate the millimeter-wave transmission function. In one example, when the T node conducts services with the G node, the G node determines that the T node has a high-rate service requirement, or the T node notifies the G node of its high-rate service requirement, and the G node instructs the T node to activate the millimeter-wave transmission function.

[0189] In an embodiment of the present application, the service requirement can be determined by both communication parties, and the second device is responsible for the management of the radio resources of both communication parties, that is, determines whether to activate the millimeter-wave transmission function according to the service requirement.

[0190] In an embodiment of the present application, when it is determined to activate the millimeter-wave transmission function in the first device, the second device sends second indication information, and the second indication information indicates to activate the millimeter-wave transmission function in the first device.

[0191] In an embodiment of the present application, it is determined whether to activate the millimeter-wave transmission function in the first device according to the service transmission requirement and / or energy-saving requirement of the first device; and on the first frequency band, send second indication information to the first device to indicate whether to activate the millimeter-wave transmission function, so as to meet the millimeter-wave transmission requirement of the first device according to actual needs.

[0192] In some embodiments, based on Figure 1 the wireless communication method shown, the wireless communication method provided by the embodiment of the present application further includes: receiving channel configuration information on the first frequency band; and enabling the millimeter-wave transmission function when the channel configuration information includes second indication information indicating to activate millimeter-wave transmission.

[0193] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiment of the present application further includes: sending channel configuration information on the first frequency band; and enabling the millimeter-wave transmission function when the channel configuration information includes second indication information indicating to activate millimeter-wave transmission.

[0194] The channel configuration information is included in the RRC message or the system message.

[0195] In an embodiment of the present application, the RRC message includes a dedicated link management message.

[0196] In some embodiments, the channel configuration information includes at least one of the following:

[0197] Second indication information for indicating whether to activate the millimeter-wave transmission function;

[0198] Idle channel information for indicating an idle channel;

[0199] Activated channel information for indicating an activated channel.

[0200] In an embodiment of the present application, before the second device sends the channel configuration information to the first device, it performs Listen Before Talk (LBT) on the millimeter-wave frequency band, monitors the usage of the idle channel, and determines the idle channel information.

[0201] In an embodiment of the present application, the second device sends the channel configuration information to the first device, and the first device performs the transmission of synchronization signals and data communication based on the channel configuration information.

[0202] In the embodiments of the present application, due to reasons such as the communication system where the first device and the second device are located not having transmission conditions (such as no available high-frequency band resources), low service quality requirements (such as low-frequency band transmission can meet the requirements), and energy saving, the network does not need to enable the millimeter-wave transmission function, and the second indication information indicates not to activate the millimeter-wave transmission function. When there is a service transmission requirement (such as higher data rate transmission), the second indication information indicates to activate the millimeter-wave transmission function.

[0203] In the embodiments of the present application, when the first device receives the second indication information indicating to activate the millimeter-wave transmission function, it enables the activation of the millimeter-wave transmission function, determines the available channels on the millimeter-wave band according to the idle channel information, and activates the corresponding channels according to the activated channel information for synchronization signal transmission and data communication.

[0204] In the embodiments of the present application, the first device receives channel configuration information on the first band; when the channel configuration information includes the second indication information indicating to activate the millimeter-wave transmission, it enables the millimeter-wave transmission function to indicate that the first device starts the initial access to the millimeter-wave band.

[0205] In some embodiments, based on Figure 1 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: receiving millimeter-wave transmission capability information on the first band; and performing data communication with the second device on the millimeter-wave band according to the millimeter-wave transmission capability information.

[0206] Correspondingly, based on Figure 2 the wireless communication method shown, the wireless communication method provided by the embodiments of the present application further includes: sending millimeter-wave transmission capability information on the first band; and performing data communication with the first device on the millimeter-wave band according to the millimeter-wave transmission capability information.

[0207] The millimeter-wave transmission capability information includes at least one of the following:

[0208] Maximum bandwidth capability information (mmWmaxBandwidthCap) for indicating the maximum number of consecutive carriers supported on the millimeter-wave band;

[0209] Channel list information for indicating at least one channel set, where different channel sets correspond to different numbers of access carriers (mmWcarrierChannelListConf);

[0210] Maximum measurement bandwidth capability information (mmWMaxMeasureBandwidthCap) for indicating the maximum measurement bandwidth on the millimeter-wave band.

[0211] In the embodiments of the present application, the millimeter-wave transmission capability information may be configured by a second device to a first device in the form of millimeter-wave frequency band configuration (mmWBandConfig).

[0212] In one example, the frequency band information of the first frequency band may be extended, and the following information included in the millimeter-wave frequency band configuration (mmWBandConfig) may be carried in the frequency band information of the first frequency band: a set of channel numbers of millimeter-wave channels (mmWcarrierChannelListConf), the maximum bandwidth capability of the millimeter-wave frequency band (mmWmaxBandwidthCap), and the maximum measurement bandwidth capability information (mmWMaxMeasureBandwidthCap).

[0213] In some other embodiments, the corresponding millimeter-wave frequency band configuration may be added to the system message, and the millimeter-wave frequency band configuration is independent of the frequency band information of the first frequency band.

[0214] In the embodiments of the present application, the second device sends the millimeter-wave transmission capability information to the first device, and the first device performs data communication with the second device according to the transmission capability on the millimeter-wave frequency band indicated by the millimeter-wave transmission capability information.

[0215] In the embodiments of the present application, the millimeter-wave transmission capability information may be carried in the system message or the RRC message.

[0216] In the embodiments of the present application, the first device receives the millimeter-wave transmission capability information on the first frequency band; so that the first device can perform data communication with the second device on the millimeter-wave frequency band according to the millimeter-wave transmission capability information.

[0217] In some embodiments, in the millimeter-wave frequency band in S102, the transmission of the synchronization signal according to the synchronization signal transmission configuration information includes: determining at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information; for each of the at least one first frame, determining at least one second frame in a group of frames corresponding to the first frame on the millimeter-wave frequency band; and transmitting the synchronization signal on the at least one second frame corresponding to each of the at least one first frame on the millimeter-wave frequency band.

[0218] Correspondingly, in S202, on the millimeter wave frequency band, transmitting the synchronization signal according to the synchronization signal transmission configuration information includes: determining, according to the synchronization signal transmission configuration information, at least one first frame of the synchronization signal on the first frequency band; for each of the at least one first frame, determining at least one second frame in a group of frames corresponding to the first frame on the millimeter wave frequency band; and transmitting the synchronization signal on at least one second frame corresponding to each of the at least one first frame on the millimeter wave frequency band.

[0219] In an embodiment of the present application, the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information and / or uplink synchronization signal transmission configuration information. The first device determines the radio frames of the downlink synchronization signal and / or the uplink synchronization signal on the first frequency band according to the downlink synchronization signal transmission configuration information and / or the uplink synchronization signal transmission configuration information. The first device performs frame number conversion according to the radio frames of the downlink synchronization signal and / or the uplink synchronization signal on the first frequency band, determines the radio frames of the downlink synchronization signal and / or the uplink synchronization signal on the first frequency band on the corresponding millimeter wave frequency band, and receives the downlink synchronization signal sent by the second device and / or sends the uplink synchronization signal to the second device by using the radio frames of the downlink synchronization signal and / or the uplink synchronization signal on the corresponding millimeter wave frequency band.

[0220] In an embodiment of the present application, the synchronization signal transmission configuration information indicates at least one radio frame of the synchronization signal on the first frequency band, that is, the first frame, and each first frame may correspond to multiple groups of frames on the millimeter wave frequency band.

[0221] In an embodiment of the present application, one frame on the first frequency band corresponds to a first number of frames on the millimeter wave frequency band, where the first number is determined based on the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0222] In an example, when the subcarrier spacing of the OFDM symbol transmitted on the millimeter wave frequency band is designed to be 1.92 MHz, which is 16 times the subcarrier spacing of 120 kHz on the first frequency band, as Figure 4 or Figure 5 shown, a group of frames corresponding to each first frame on the millimeter wave frequency band may be 16 frames.

[0223] The first device or the second device may determine the frame numbers of a group of frames corresponding to the first frame on the millimeter wave frequency band according to the frame number of the first frame.

[0224] In an example, when the subcarrier spacing of the OFDM symbol transmitted on the millimeter wave frequency band is designed to be 1.92 MHz, which is 16 times the subcarrier spacing of 120 kHz on the first frequency band, the radio frame number on the millimeter wave frequency band may refer to Equation (1):

[0225] nsf,mmW = 16n sf + n off , n off = 0, 1, … 15 Equation (1)

[0226] In Equation (1), n sf is the radio frame number on the first frequency band for transmitting the synchronization signal, and n off is the radio frame number on the millimeter wave frequency band for transmitting the synchronization signal within a range of radio frame numbers on the first frequency band.

[0227] In an embodiment of the present application, one or more second frames for transmitting the synchronization signal may be determined in a group of frames on the millimeter wave frequency band.

[0228] In an embodiment of the present application, the second device performs frame number conversion according to the first frame determined according to the synchronization signal transmission configuration information, determines a group of frames on the millimeter wave frequency band for the second device, and the second device uses the transmission resources on the millimeter wave frequency band to transmit the synchronization signal within the group of frames corresponding to the first frame.

[0229] In an embodiment of the present application, the first device determines at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information; and determines at least one second frame from a corresponding group of frames on the millimeter wave frequency band for each first frame in the at least one first frame; finally, the synchronization signal is transmitted on the at least one second frame corresponding to each first frame in the at least one first frame on the millimeter wave frequency band.

[0230] In an embodiment of the present application, a predetermined frame in the group of frames corresponding to the first frame may be determined as at least one second frame, or the first device may also indicate at least one second frame in the group of frames corresponding to the first frame.

[0231] In some embodiments, the synchronization signal transmission configuration information includes: millimeter wave synchronization signal transmission indication information. The determining of at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information includes:

[0232] Obtaining pre - defined transmission resource information for the first frequency band according to the millimeter wave synchronization signal transmission indication information; and determining one of the first frames on the first frequency band according to the pre - defined transmission resource information for the first frequency band and a third frame on the first frequency band, where the third frame is the frame for transmitting the millimeter wave synchronization signal transmission indication information.

[0233] In the embodiments of the present application, the transmission resource information for the first frequency band can be predefined in the air interface standard, and the first frame is determined based on the predefined transmission resources for the first frequency band. Among them, the transmission period of the synchronization signal transmitted on the millimeter wave frequency band is the same as the system message period on the first frequency band. In this case, one transmission of the millimeter wave synchronization signal transmission indication information indicates one first frame, and at least one first frame corresponding to the first frame is determined based on the first frame. It can be understood that one transmission of the millimeter wave synchronization signal transmission indication information indicates the transmission of the synchronization signal for one period, and in the synchronization signal for one period, one or more repeatedly transmitted synchronization signals are included, and different synchronization signals are transmitted using different beams in different millimeter wave frames.

[0234] In some embodiments, the predefined transmission resource information for the first frequency band may include the time offset of the first frame on the first frequency band relative to the third frame.

[0235] According to the transmission resource information for the first frequency band, the time offset of the first frame relative to the third frame is determined, and based on this time offset and the third frame, a first frame on the first frequency band is determined.

[0236] In one example, as Figure 6 shown, if the frame number of the radio frame of the system message on the first frequency band is 1 and the time offset is 1, and the frame number of the first frame on the first frequency band is determined to be 2, then the frame numbers of a set of frames corresponding to the synchronization signal on the millimeter wave frequency band are from 16 to 32.

[0237] In the embodiments of the present application, the second device uses the same method as above to determine at least one first frame of the synchronization signal on the first frequency band.

[0238] In some embodiments, the synchronization signal transmission configuration information includes: the transmission resource information for the first frequency band. According to the above synchronization signal transmission configuration information, determining at least one first frame of the synchronization signal on the first frequency band includes:

[0239] According to the transmission resource information for the first frequency band and the third frame on the first frequency band, the at least one first frame on the first frequency band is determined, and the third frame is the frame for transmitting the transmission resource information for the first frequency band.

[0240] In the embodiments of the present application, the following information can be indicated in the transmission resource information for the first frequency band: time offset, transmission period. Here, the transmission period can be understood as the transmission period of the synchronization signal.

[0241] The time offset is used to determine, for a third frame, a first frame that is closest to the third frame, and one or more first frames are determined based on the transmission period and this first frame. Among them, when the transmission period of the synchronization signal is the same as the transmission period of the transmission resource information of the first frequency band, only one first frame is determined. When the transmission period of the synchronization signal is different from the transmission period of the transmission resource information of the first frequency band, at this time, one or more first frames can be determined.

[0242] It should be noted that one or more frames determined based on the transmission resource information for the first frequency band are within one transmission period of the transmission resource information for the first frequency band.

[0243] Taking the case where the transmission resource information for the first frequency band is carried in the SIB as an example, at least one first frame on the first frequency band is determined according to the time offset between the transmission resource of the synchronization signal transmitted for the first time on the first frequency band and the transmission of the SIB, the transmission period of the synchronization signal, and the SIB radio frame. As Figure 7 shown, according to the time offset Δ tss,tx,off between the transmission resource of the downlink synchronization signal transmitted for the first time and the transmission of the SIB, and the transmission period of the downlink synchronization signal, a set of frames corresponding to the first frame of the downlink synchronization signal on the millimeter wave band within one SIB period is determined. According to the time offset Δ tra,rx,off between the transmission resource of the uplink synchronization signal transmitted for the first time and the transmission of the SIB, and the transmission period of the uplink synchronization signal, a set of frames corresponding to the first frame of the uplink synchronization signal on the millimeter wave band within one SIB period is determined.

[0244] In the embodiments of the present application, one or more periods of synchronization signals can be scheduled within one SIB period. One period of synchronization signals can include transmissions of multiple synchronization signals, and different synchronization signals use different beams in different millimeter wave frames.

[0245] In the embodiments of the present application, the second device uses the same method as above to determine at least one first frame of the synchronization signal on the first frequency band.

[0246] In some embodiments, for each of the at least one first frame among the at least one first frame, determining at least one second frame in a set of frames corresponding to the first frame on the millimeter wave band includes:

[0247] Receiving millimeter wave frame indication information on the first frequency band;

[0248] For each of the at least one first frame among the at least one first frame, according to the millimeter wave frame indication information, at least one second frame corresponding to the first frame is determined in a set of frames corresponding to the first frame on the millimeter wave band.

[0249] In an embodiment of the present application, a first device receives millimeter-wave frame indication information on a first frequency band; the millimeter-wave frame indication information may indicate at least one second frame for transmitting a synchronization signal in a set of frames on the millimeter-wave frequency band corresponding to a first frame. In one example, if the millimeter-wave frame indication information indicates that the first frame in each set of frames corresponding to the first frame transmits the synchronization signal, then, if there is a first frame with a frame number of 2 on the first frequency band and a frame number of 16 to 32 in the set of frames corresponding to the millimeter-wave frequency band, it can be determined that the radio frame number of the synchronization signal transmitted on the millimeter-wave frequency band is 16.

[0250] The millimeter-wave frame indication information may indicate at least one second frame for transmitting a synchronization signal in a set of frames on the millimeter-wave frequency band corresponding to a first frame in the form of a bit map. Among them, one bit in the bit map corresponds to one frame on the millimeter wave to indicate whether the corresponding frame is a second frame.

[0251] In an embodiment of the present application, for one bit, different values can be used to indicate whether the corresponding frame is used to transmit the synchronization signal, that is, whether it is a second frame.

[0252] In one example, as Figure 4 shown, when the value of the bit is 0, it indicates that the millimeter-wave frame does not transmit the synchronization signal, and when the value of the bit is 1, it indicates that the millimeter-wave frame transmits the synchronization signal. This method can most flexibly indicate the millimeter-wave radio frame numbers that can transmit the synchronization signal, but more bits (for example, 16 bits) need to be added to the system information.

[0253] In an embodiment of the present application, multiple Comb-type patterns can be predefined, and the millimeter-wave frame indication information may indicate one of the multiple Comb-type patterns, and the second device determines at least one second frame based on the pattern indicated by the millimeter-wave frame indication information. Among different Comb-type patterns, different millimeter-wave frames are second frames.

[0254] In one example, as Figure 5 shown, 4 patterns are defined. Pattern 0 may indicate that all millimeter-wave frames in a set of frames transmit the synchronization signal; Pattern 1 may indicate that one millimeter-wave frame out of every 2 millimeter-wave frames in a set of frames transmits the synchronization signal; Pattern 2 may indicate that one millimeter-wave frame out of every 4 millimeter-wave frames in a set of frames transmits the synchronization signal; Pattern 3 may indicate that one millimeter-wave frame out of every 8 millimeter-wave frames in a set of frames transmits the synchronization signal. This method only needs to add 2 bits to indicate the selected pattern.

[0255] In an embodiment of the present application, the synchronization signal transmission configuration information indicates the transmission resources on the first frequency band. Therefore, the transmission resources of the synchronization signal transmitted on the millimeter-wave frequency band can be converted according to the radio frame number of the synchronization signal on the first frequency band.

[0256] The following describes the application of the embodiments of the present application in actual scenarios.

[0257] With the large-scale commercial deployment of 5G networks, a large number of applications and services that require high-speed, low-latency, and highly reliable wireless connections have emerged, such as intelligent manufacturing, smart homes, VR / AR / XR, and Industrial Internet 4.0. To meet the wireless communication requirements in these emerging scenarios, relevant standardization organizations or groups, such as the SparkLink Alliance, have developed a new short-range wireless communication system standard, SparkLink 1.0, to provide wireless transmission capabilities that meet short-range service requirements. The currently developed SparkLink 1.0 air interface standards include a basic version (Sparklink Basic, SLB) that supports ultra-low latency and a low-power version (SparkLink Low-Energy, SLE) that supports low-power transmission.

[0258] With the growth of some emerging application requirements, in scenarios such as augmented reality / virtual reality, short-range communication, and positioning perception, the requirements for throughput, latency, and accuracy are becoming increasingly stringent. The huge bandwidth provided by the millimeter-wave band, combined with the widely used 2.4 GHz, 5 GHz, and 6 GHz bands, is expected to meet the above requirements in dense environments.

[0259] Therefore, in order to further expand the application scenarios of SparkLink technology and meet the requirements of higher throughput, lower latency, and higher positioning accuracy, it is necessary to add support for the transmission of 45 GHz - 60 GHz millimeter-wave band signals in the SparkLink 3.0 standard. Relevant research projects have been launched, mainly including the following technical contents:

[0260] (1) Support for the SLB millimeter-wave air interface transmission scheme in the Non-Standalone (NSA) mode;

[0261] (2) Design of the basic physical layer parameters for SLB millimeter-wave transmission, including subcarrier spacing, cyclic prefix length, radio frame structure, modulation and coding scheme, and related signaling support, etc.;

[0262] (3) Design of the SLB millimeter-wave multi-antenna transmission technology, including multi-stream transmission scheme, channel state information feedback, link adaptation transmission, and beam management scheme design, etc.;

[0263] (4) Design of the SLB millimeter-wave multi-carrier technology transmission scheme, including multi-carrier aggregation transmission scheme and cross-carrier scheduling, etc.

[0264] Among them, the SLB millimeter-wave air interface transmission supporting the NSA mode is the biggest feature that differentiates the SparkLink 3.0 system from other wireless systems. Through the control signaling transmitted in the low-frequency band, it supports the data transmission scheme with beamforming enhancement in the high-frequency band.

[0265] The Carrier Aggregation (CA) technology is introduced in the 3GPP NR system, which supports intra-band continuous component carriers, intra-band non-continuous component carriers, and inter-band component carriers. A larger transmission bandwidth is obtained by combining multiple subcarriers, and thus a higher peak data rate is achieved. It is also defined in the standard for RRC, MAC CE, and DCI, mainly to support the physical layer data scheduling of the secondary cell operating on the secondary component carrier (SCC) by the primary cell operating on the primary component carrier (PCC). This cross-carrier method is an aggregation method for carriers within the same working low-frequency band or high-frequency band.

[0266] In terms of supporting millimeter-wave transmission, the 3GPP NR Radio Access Network (RAN) realizes data transmission in the millimeter-wave band in a Standalone form, adding a complete inter-node interaction process supporting the characteristics of millimeter-wave transmission. For example, in initial access, multi-beam transmission may be supported through the predefined SSB resource set, and beam management is realized by introducing the CSI-RS resource set in link measurement, etc. These transmission methods define a complete signaling and interaction process in the millimeter-wave band.

[0267] In the SparkLink system, in order to support the Non-Standalone mode, some information can also be placed in low-frequency transmission, and the millimeter-wave signal can only support data transmission. Therefore, it is necessary to define signaling information supporting millimeter-wave data transmission in the low-frequency traditional system. In the physical layer control signal design of the low-frequency system, especially in the control signal design of data resources, that is, the signaling design assuming that the device node has already established a connection with the management node, there is no design for the initial access process.

[0268] For the initial access process, since the transceivers for low-frequency and high-frequency transmissions will match different crystal oscillators, the inter-node time-frequency synchronization achieved by the low-frequency signal through the initial access process will no longer be applicable to millimeter-wave-based signal transmissions. Therefore, a new initial access scheme needs to be designed for millimeter-wave signals, especially for the SparkLink system using unlicensed bands.

[0269] Based on the above description, in the embodiment of this application, when designing the initial access process of a SparkLink system that supports millimeter-wave transmission, the initial access process for high-frequency data transmission is split into low-frequency and high-frequency transmission parts, and the signaling and signals for transmissions in the corresponding frequency bands are defined respectively.

[0270] For the non-standalone transmission mode of the SparkLink millimeter-wave system, the embodiment of this application proposes an initial access process for millimeter-wave signals based on the interaction information in the low-frequency band, including adding a downlink millimeter-wave synchronization signal transmission indication, millimeter-wave transceiver beam-related information, a millimeter-wave random access signal transmission indication, and other relevant information to the signals transmitted in the low-frequency band to achieve the initial synchronization and access of the millimeter-wave system.

[0271] In the SparkLink system, the domain management node (G node, corresponding to the second device in the foregoing embodiment) sends a system broadcast message on the low-frequency carrier. The device nodes (T nodes, corresponding to the first device in the foregoing embodiment) in the domain achieve downlink time-frequency synchronization by receiving this broadcast message and the downlink synchronization signals (First Training Signal, FTS and Second Training Signal, STS), and obtain system messages and configuration information related to initial access at low-frequency points, etc. Specifically, the content related to the frequency band in the current system broadcast message in the current SparkLink 2.0 system, that is, the "communication domain system message", is as follows: currentBandConfig is used to indicate the channel configuration information of the current frequency band, where maxBandwidthCap is used to indicate the maximum number of consecutive basic carriers supported on the current operating frequency band, that is, the maximum bandwidth capacity on the current operating frequency band; carrierChannelListConf is used to indicate the set of channel numbers corresponding to one or more carriers that the G node can access on the current operating frequency band within the maxBandwidthCap capacity range. When this information indicates multiple channel numbers, the time and frequency synchronization of the multiple carriers on these channels, the T node can access multiple carriers to communicate with the G node, and the T node can send or receive data from the same application on different carriers.

[0272] To indicate support for high-frequency millimeter-wave signal transmission, it is necessary to add millimeter-wave band channel configuration information (such as mmWBandConfig) to this system message, or expand the existing relevant band information indication content to carry the information included in the following mmWBandConfig in the band information. Among them, mmWBandConfig includes: a set of channel numbers of millimeter-wave channels (such as mmWcarrierChannelListConf), the maximum bandwidth capacity of the millimeter-wave band (such as mmWmaxBandwidthCap), and the maximum measurement bandwidth (such as mmWMaxMeasureBandwidthCap).

[0273] Among them, mmWmaxBandwidthCap is used to indicate the maximum number of continuous carriers supported on the millimeter-wave band, that is, the maximum bandwidth capacity on the current millimeter-wave band; mmWcarrierChannelListConf is used to indicate a set of channel numbers of one or more carriers that the T node can access on the millimeter-wave band within the mmWmaxBandwidthCap capacity range. When this information indicates multiple channel numbers, the time and frequency of the multiple carriers on these channels are synchronized, and the T node can access multiple carriers to communicate with the G node. The T node can send or receive data from the same application on different carriers; mmWMaxMeasureBandwidthCap is used to indicate the maximum measurement bandwidth capacity on the millimeter-wave band, that is, the maximum measurement bandwidth. The sum of the bandwidths of all configured channels should not exceed the maximum bandwidth capacity mmWmaxBandwidthCap of the millimeter-wave band.

[0274] In the non-standalone mode, if there are reasons such as lack of transmission conditions (such as no available high-frequency band resources), low quality-of-service requirements (such as low-frequency band transmission can meet the requirements), and energy saving, the network does not need to enable the millimeter-wave transmission function. Therefore, it is necessary to add in the system message or RRC the information on the idle channel numbers on the millimeter-wave band, whether to activate the millimeter-wave transmission, and the channel numbers of the corresponding activated millimeter-wave channels.

[0275] When there is a service transmission requirement (such as higher data rate transmission), the radio access network needs to enable millimeter-wave transmission. The domain management node starts to listen for whether the high-frequency carrier band is idle (Listen-Before-Talk, LBT), selects and determines the channel numbers of the millimeter-wave channels to be transmitted according to the idle situation, and indicates that all device nodes in the domain can start the initial access process on the indicated idle millimeter-wave channels. The device nodes with millimeter-wave transmission capabilities need to activate the millimeter-wave transmission function, and the device nodes can transmit in the RRC (dedicated link management information) or the system message the information on activating the millimeter-wave transmission and the corresponding channel numbers of the activated millimeter-wave channels.

[0276] In the embodiments of the present application, the device node does not need to implement a complete initial access process on the high-frequency carrier, but only needs to implement time-frequency synchronization between nodes on the selected millimeter-wave channel. Therefore, the following two new signals and corresponding configurations need to be added:

[0277] First: In the periodic system broadcast sent on the low-frequency carrier, add the transmission configuration information of the millimeter-wave synchronization signal transmission resource, indicating that the device nodes within the domain receive the millimeter-wave downlink (G-link) synchronization signal on the given time-frequency resource (radio frame) on the selected millimeter-wave channel to achieve downlink synchronization. The following factors will be considered in its design:

[0278] 1. The correlation with the low-frequency band signal.

[0279] For the non-standalone mode, the system information is transmitted through the low-frequency band channel, mainly including the radio frame number transmitted on the low-frequency band and the communication domain G node identifier. For the radio frame number identifier transmitted on the millimeter wave, the physical layer parameter design will be considered to correspond to the radio frame number transmitted on the low-frequency band. For example, when the subcarrier spacing of the OFDM symbol transmitted on the millimeter wave is designed to be 1.92 MHz, which is 16 times that of the subcarrier spacing of 120 kHz on the low-frequency band, the radio frame number on the millimeter wave can refer to formula (1).

[0280] Among them, this radio frame number is used to indicate the low-frequency radio frame carrying the synchronization signal, and then the T node converts this radio frame number into the radio frame number in the millimeter-wave frequency band.

[0281] In the SparkLink system, the default subcarrier spacing in the low-frequency band is 120 kHz, and the optional one is 15 kHz. A similar proportional relationship can be adopted. The subcarrier spacing of the millimeter wave has not been finally determined, and 1.92 MHz is a relatively acceptable way. Other intervals are not excluded, but the subcarrier spacing in the low-frequency band and the subcarrier spacing of the millimeter wave conform to a multiple relationship.

[0282] Within a range corresponding to the length of the low-frequency radio frame, in order to indicate the radio frame number of the millimeter wave carrying the synchronization signal, there are the following two implementation methods:

[0283] (1) Use the bit-mapping method to indicate the radio frame number of the millimeter wave where the transmitted synchronization signal is located. As Figure 4 shown, bit 1 indicates that this millimeter-wave radio frame transmits the synchronization signal, and bit 0 indicates that it does not transmit the synchronization signal. This method can most flexibly indicate the radio frame number of the millimeter wave on which the synchronization signal can be transmitted, but more bits (16 bits) need to be added to the system message.

[0284] (2) Use the method of predefining several Comb-type patterns to indicate the radio frame number of the millimeter wave where the transmitted synchronization signal is located. As Figure 5As shown, 4 comb-like patterns are predefined. Among them, Pattern 0 can represent that all millimeter-wave frame transmission synchronization signals in a group of frames; Pattern 1 can represent that in a group of frames, one millimeter-wave frame transmits a synchronization signal every 2 millimeter-wave frames; Pattern 2 can represent that in a group of frames, one millimeter-wave frame transmits a synchronization signal every 4 millimeter-wave frames; Pattern 3 can represent that in a group of frames, one millimeter-wave frame transmits a synchronization signal every 8 millimeter-wave frames. This method only needs to add 2 bits to indicate the selected pattern.

[0285] In addition, the communication domain G node identifier used to generate the synchronization sequence will be consistent with the identifier transmitted in the low-frequency band.

[0286] 2. Support flexible multi-beam transmission and reception.

[0287] Different from low-frequency band transmission, millimeter-wave transmission needs to support multi-beam transmission, especially for downlink synchronization signals. Therefore, consider adopting a repeated transmission method for downlink synchronization signals, and a flexible beamforming scheme can be adopted for each transmitted synchronization signal. The device node measures the received downlink synchronization signal, calculates the downlink signal quality strength L1-RSRP, and feeds it back to the management node through the low-frequency band channel. Therefore, it is necessary to add a feedback signaling for the measurement result of the millimeter-wave downlink synchronization signal in the low-frequency band channel to determine the optimal transmission beam.

[0288] In the embodiment of this application, an implementation method of millimeter-wave downlink synchronization signal is to expand the second training signal in the existing StarFlash system, that is, the ZC sequence, and achieve the purpose of flexibly supporting multi-beam transmission by configuring multiple transmissions in the time domain.

[0289] Second: In the periodic system broadcast transmitted on the low-frequency carrier, add the configuration information of the millimeter-wave random access signal or the uplink synchronization signal reception resource, and indicate that the device node transmits the uplink (T link) random access signal or synchronization signal on the selected millimeter-wave given time-frequency resource (radio frame) to achieve uplink synchronization.

[0290] Its design will consider the following factors:

[0291] 1. Support flexible multi-beam transmission and reception.

[0292] To support multi-beam transmission, the uplink random access signal or synchronization signal also needs to adopt a repeated transmission method, and a flexible beamforming scheme can be adopted for each transmission. The domain management node can reserve corresponding resources for multi-beam reception in a similar way to the above-mentioned downlink synchronization signal transmission, and configure the optimal transmission beam for the subsequent data transmission of this device node based on the measured uplink signal quality strength L1-RSRP through the low-frequency channel.

[0293] 2. The correlation with the millimeter-wave downlink synchronization signal.

[0294] Since the measurement results based on the millimeter-wave channel synchronization signal can all be transmitted through the low-frequency channel, the uplink synchronization signal transmission method does not need to be related to the downlink synchronization signal and can be configured flexibly and independently. However, it is recommended to use the same period and a fixed radio frame deviation as the downlink synchronization signal transmission.

[0295] In an embodiment of the present application, an implementation method of synchronizing signal transmission is based on the preamble sequence in the existing NR. By configuring multiple transmissions in the time domain, the purpose of flexibly supporting multi-beam transmission is achieved.

[0296] The above transmission configuration of the synchronization signal on the millimeter wave needs to be indicated on the low-frequency carrier. For the in-domain device nodes that have not yet accessed, this part of the information needs to be indicated in the periodically transmitted system message, and there are the following two implementation methods:

[0297] Method 1: The system message directly indicates the periodic transceiver resources of the synchronization signal on the millimeter-wave channel.

[0298] The transmission format of the uplink and downlink synchronization signal transmissions in millimeter-wave transmission needs to be predefined in the air interface standard, including the time domain resources of the signal, the transceiver period, and the number of beams that each transceiver time slot needs to support, etc. As Figure 6 shown, Figure 6 in the figure, a small grid in the shaded part is a millimeter frame. During a T SIB period, there are multiple millimeter frames for transmitting or receiving the synchronization signal. Different frames correspond to different beams. Among them, there are also beams for the uplink synchronization signal. This method requires the period of the millimeter-wave synchronization signal to be consistent with the period of the system message on the low-frequency band. Among them, the time domain resources can be understood as the predefined time offset (the offset relative to the time of receiving the SIB).

[0299] To indicate this information, only the high-frequency carrier transmission function needs to be enabled in the low-frequency system message, and the device node can receive the synchronization signal at the corresponding frequency point. In some embodiments, several parameter combinations can be defined in the standard to meet different service quality requirements.

[0300] Method 2: The system message only indicates the synchronization signal transceiver resources on the high-frequency carrier within this period.

[0301] The transmission format of the uplink and downlink synchronization signal transmissions in millimeter-wave transmission is determined within a system broadcast message period. The synchronization signal within this period is indicated by the most recent system broadcast, including the first downlink synchronization signal transmission time Δ tss,tx,off 、the first uplink synchronization signal transmission time Δ tra,rx,off and the period T SS etc. As Figure 7As shown, according to the first downlink synchronization signal transmission time, the first uplink synchronization signal transmission time, and the period T SS the corresponding radio frame on the millimeter wave band is determined. This method can more flexibly indicate high-frequency access information, especially considering the contention access in the unlicensed band.

[0302] In the embodiment of the present application, after the management node receives the uplink synchronization signal (i.e., the initial access signal) of the device node, time-frequency synchronization with the management node is achieved at this high-frequency point, and the optimal transmission beam indication information is sent to the device on the low-frequency carrier.

[0303] In the embodiment of the present application, the initial access process of the millimeter wave channel is as Figure 8 shown, and may include the following steps S801 to S809:

[0304] Step S801: The management node (G node) determines the available millimeter wave band information through listening and enables the millimeter wave transmission function;

[0305] Step S802: The management node sends the enabled millimeter wave transmission capability and related configuration information, such as the channel number of the millimeter wave band;

[0306] Step S803: The device node (T node) with the millimeter wave transmission function enables the millimeter wave transmission function and prepares to detect the G link synchronization signal;

[0307] Step S804: The management node sends the downlink synchronization signal using the corresponding beam on the configured millimeter wave frame;

[0308] Step S805: The device node achieves downlink synchronization by detecting the synchronization signal and measures the downlink beam quality;

[0309] Step S806: The device node sends the uplink synchronization signal using the corresponding beam on the configured millimeter wave radio frame;

[0310] Step S807: The device node sends the downlink beam measurement result to the management node in the low-frequency band;

[0311] Step S808: The management node receives the uplink synchronization signal to achieve uplink synchronization and determines the optimal downlink beam;

[0312] Step S809: The management node sends the uplink beam quality measurement result to the device node, or directly configures the optimal uplink beam.

[0313] In the embodiments of the present application, for the non-standalone transmission mode of the SparkLink millimeter-wave system, an initial access process of millimeter-wave signals based on the interaction information in the low-frequency band is proposed, including adding a downlink millimeter-wave synchronization signal transmission indication, millimeter-wave transceiver beam-related information, a millimeter-wave random access signal transmission indication, and other relevant information to the signals transmitted in the low-frequency band to achieve the initial synchronization and access of the millimeter-wave system.

[0314] In a fourth aspect, to implement the above wireless communication method, a device 900 (the first device or the second device) according to an embodiment of the present application, as Figure 9 shown, may include at least one processor 901 and at least one transceiver 902 coupled to the at least one processor 901. The transceiver 902 may include at least one separate receiving circuit system and transmitting circuit system, or at least one integrated receiving circuit system and transmitting circuit system. The at least one processor 901 may be a central processing unit (CPU), a microprocessor unit (MPU), a digital signal processor (DSP), or a field-programmable gate array (FPGA), etc.

[0315] According to some embodiments of the present application, when the device 900 is the first device, the first device includes a first transceiver; and

[0316] a first processor coupled to the first transceiver; the first processor is configured to:

[0317] receive, via the first transceiver, synchronization signal transmission configuration information sent by a second device on a first frequency band, where the first frequency band is lower than the millimeter-wave frequency band, the second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain;

[0318] transmit synchronization signals on the millimeter-wave frequency band according to the synchronization signal transmission configuration information via the first transceiver.

[0319] In some embodiments, the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information, and the first processor is configured to:

[0320] receive at least one downlink synchronization signal on the millimeter-wave frequency band according to the downlink synchronization transmission configuration information via the first transceiver.

[0321] In some embodiments, the first processor is configured to:

[0322] Measure the at least one downlink synchronization signal to obtain a first measurement result, where the first measurement result includes measurement results of at least one transmission beam of the second device, and different transmission beams among the at least one transmission beam of the second device are used to transmit different ones of the downlink synchronization signals;

[0323] Transmit the first measurement result to the second device via the first transceiver on the first frequency band.

[0324] In some embodiments, the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information, and the first processor is configured to:

[0325] Transmit at least one uplink synchronization signal according to the uplink synchronization signal transmission configuration information via the first transceiver on the millimeter wave frequency band.

[0326] In some embodiments, the first processor is configured to:

[0327] Receive a second measurement result sent by the second device via the first transceiver on the first frequency band, and select an optimal transmission beam from at least one transmission beam of the first device according to the second measurement result; or,

[0328] Receive first indication information indicating an optimal transmission beam sent by the second device via the first transceiver on the first frequency band;

[0329] The second measurement result includes measurement results of at least one transmission beam of the first device, and different transmission beams among the at least one transmission beam of the first device are used to transmit different ones of the uplink synchronization signals.

[0330] In some embodiments, the processor is configured to:

[0331] Receive system information via the first transceiver on the first frequency band, where the system information includes the synchronization signal transmission configuration information.

[0332] In some embodiments, the first processor is configured to:

[0333] Receive channel configuration information via the first transceiver on the first frequency band;

[0334] Enable the millimeter wave transmission function when the channel configuration information includes second indication information indicating activation of millimeter wave transmission.

[0335] In some embodiments, the channel configuration information is included in an RRC message or system information.

[0336] In some embodiments, the channel configuration information includes at least one of the following:

[0337] Second indication information for indicating whether to activate the millimeter wave transmission function;

[0338] Idle channel information for indicating an idle channel;

[0339] Activation channel information for indicating an activated channel.

[0340] In some embodiments, the first processor is configured to:

[0341] Receive millimeter wave transmission capability information on the first frequency band via the first transceiver;

[0342] Perform data communication with the second device on the millimeter wave frequency band according to the millimeter wave transmission capability information via the first transceiver.

[0343] In some embodiments, the millimeter wave transmission capability information includes at least one of the following:

[0344] Maximum bandwidth capability information for indicating the maximum number of consecutive carriers supported on the millimeter wave frequency band;

[0345] Channel list information for indicating at least one channel set, where different channel sets correspond to different numbers of access carriers;

[0346] Maximum measurement bandwidth capability information for indicating the maximum measurement bandwidth on the millimeter wave frequency band.

[0347] In some embodiments, the first processor is configured to:

[0348] Determine at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information;

[0349] For each first frame in the at least one first frame, determine at least one second frame in a group of frames corresponding to the first frame on the millimeter wave frequency band;

[0350] Transmit the synchronization signal on at least one second frame corresponding to each first frame in the at least one first frame on the millimeter wave frequency band via the first transceiver.

[0351] In some embodiments, the synchronization signal transmission configuration information includes: millimeter wave synchronization signal transmission indication information; the first processor is configured to:

[0352] Obtain predefined transmission resource information for the first frequency band according to the millimeter wave synchronization signal transmission indication information;

[0353] Determine a first frame on the first frequency band according to predefined transmission resource information for the first frequency band and a third frame on the first frequency band, where the third frame is a frame for transmitting millimeter-wave synchronization signal transmission indication information.

[0354] In some embodiments, the synchronization signal transmission configuration information includes: transmission resource information for the first frequency band; the first processor is configured to:

[0355] Determine at least one first frame on the first frequency band according to the transmission resource information for the first frequency band and a third frame on the first frequency band, where the third frame is a frame for transmitting transmission resource information for the first frequency band.

[0356] In some embodiments, the first processor is configured to:

[0357] Receive millimeter-wave frame indication information on the first frequency band via the first transceiver;

[0358] For each first frame in the at least one first frame, determine at least one second frame corresponding to the first frame in a set of frames on the millimeter-wave frequency band corresponding to the first frame according to the millimeter-wave frame indication information.

[0359] A second processor, which is coupled to a second transceiver; the second processor is configured to:

[0360] Send synchronization signal transmission configuration information to a first device on a first frequency band via the second transceiver, where the first frequency band is lower than the millimeter-wave frequency band, the second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain;

[0361] Transmit a synchronization signal on the millimeter-wave frequency band according to the synchronization signal transmission configuration information via the second transceiver.

[0362] In some embodiments, the second processor is configured to:

[0363] Determine whether to activate the millimeter-wave transmission function in the first device according to the service transmission requirement and / or energy-saving requirement of the first device;

[0364] Send second indication information to the first device on the first frequency band via the second transceiver, where the second indication information is used for whether to activate the millimeter-wave transmission function.

[0365] The description of the above device embodiments is similar to that of the above method embodiments and has similar beneficial effects to the method embodiments. For the technical details not disclosed in the device embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.

[0366] It should be noted that in the embodiments of the present application, if the above wireless communication method is implemented in the form of software function modules and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), magnetic disks, or optical discs that can store program codes. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0367] In a fifth aspect, to implement the above wireless communication method, an embodiment of the present application provides an electronic device, including a memory and a processor. The memory stores a computer program that can run on the processor, and when the processor executes the program, it implements the steps in the wireless communication method provided in the above embodiments.

[0368] In a sixth aspect, an embodiment of the present application provides a storage medium, that is, a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps in the wireless communication method provided in the above embodiments.

[0369] It should be pointed out here that: the descriptions of the above storage medium and device embodiments are similar to those of the above method embodiments and have similar beneficial effects to the method embodiments. For the technical details not disclosed in the storage medium and device embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.

[0370] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in some embodiments" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0371] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0372] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling, direct coupling or communication connection between the components shown or discussed with each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0373] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; they can be located in one place or distributed to multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0374] In addition, each functional unit in the embodiments of the present application can be all integrated in a processing unit, or each unit can be separately used as a unit, or two or more units can be integrated in a unit; the above integrated units can be implemented in the form of hardware, or in the form of a combination of hardware and software functional units.

[0375] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including those of the above method embodiments. The aforementioned storage medium includes various media that can store program codes, such as removable storage devices, read-only memory (ROM), magnetic disks, or optical discs.

[0376] Alternatively, if the above integrated units of the present application are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as removable storage devices, ROM, magnetic disks, or optical discs.

[0377] The above is only the implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A first device, the first device comprising a first transceiver; and a first processor coupled to the first transceiver; the first processor being configured to: receive, via the first transceiver, synchronization signal transmission configuration information sent by a second device on a first frequency band, the first frequency band being lower than the millimeter wave frequency band, the second device and at least one of the first devices forming a domain, the second device being configured to manage communication of the at least one device within the domain; transmit a synchronization signal on the millimeter wave frequency band according to the synchronization signal transmission configuration information via the first transceiver.

2. The first device according to claim 1, wherein the synchronization signal transmission configuration information includes downlink synchronization signal transmission configuration information, and the first processor is configured to: receive at least one downlink synchronization signal on the millimeter wave frequency band according to the downlink synchronization transmission configuration information via the first transceiver.

3. The first device according to claim 2, wherein the first processor is configured to: measure the at least one downlink synchronization signal to obtain a first measurement result, the first measurement result including measurement results of at least one transmission beam of the second device, different transmission beams among the at least one transmission beam of the second device being used to transmit different downlink synchronization signals; send the first measurement result to the second device on the first frequency band via the first transceiver.

4. The first device according to claim 1, wherein the synchronization signal transmission configuration information includes uplink synchronization signal transmission configuration information, and the first processor is configured to: transmit at least one uplink synchronization signal on the millimeter wave frequency band according to the uplink synchronization signal transmission configuration information via the first transceiver.

5. The first device according to claim 4, wherein the first processor is configured to: receive a second measurement result sent by the second device on the first frequency band via the first transceiver, and select an optimal transmission beam from at least one transmission beam of the first device according to the second measurement result; or, receive first indication information indicating an optimal transmission beam sent by the second device on the first frequency band via the first transceiver; the second measurement result includes measurement results of at least one transmission beam of the first device, different transmission beams among the at least one transmission beam of the first device being used to transmit different uplink synchronization signals.

6. The first device according to any one of claims 1 to 5, wherein the processor is configured to: receive system information on the first frequency band via the first transceiver, the system information including the synchronization signal transmission configuration information; or, receive channel configuration information on the first frequency band via the first transceiver; enable the millimeter wave transmission function when the channel configuration information includes second indication information indicating activation of millimeter wave transmission.

7. The first device according to any one of claims 1 to 5, wherein the first processor is configured to: Receive millimeter - wave transmission capability information on the first frequency band via the first transceiver; Perform data communication with the second device on the millimeter - wave frequency band according to the millimeter - wave transmission capability information via the first transceiver.

8. The first device according to any one of claims 1 to 5, wherein the first processor is configured to: Determine at least one first frame of the synchronization signal on the first frequency band according to the synchronization signal transmission configuration information; For each of the at least one first frame in the at least one first frame, determine at least one second frame in a set of frames corresponding to the first frame on the millimeter - wave frequency band; Transmit the synchronization signal on at least one second frame corresponding to each of the at least one first frame on the millimeter - wave frequency band via the first transceiver.

9. A second device, the second device includes a second transceiver; and A second processor coupled to the second transceiver; the second processor is configured to: Send synchronization signal transmission configuration information to a first device on a first frequency band via the second transceiver, the first frequency band being lower than the millimeter - wave frequency band, the second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain; Transmit the synchronization signal on the millimeter - wave frequency band according to the synchronization signal transmission configuration information via the second transceiver.

10. A wireless communication method applied to a first device, the method includes: Receive synchronization signal transmission configuration information sent by a second device on a first frequency band, the first frequency band being lower than the millimeter - wave frequency band, the second device and at least one of the first devices form a domain, and the second device is used to manage the communication of the at least one device within the domain; Transmit the synchronization signal on the millimeter - wave frequency band according to the synchronization signal transmission configuration information.

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