WO2023207589A1 - 信息传输的方法和通信装置 - Google Patents

信息传输的方法和通信装置 Download PDF

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Publication number
WO2023207589A1
WO2023207589A1 PCT/CN2023/087774 CN2023087774W WO2023207589A1 WO 2023207589 A1 WO2023207589 A1 WO 2023207589A1 CN 2023087774 W CN2023087774 W CN 2023087774W WO 2023207589 A1 WO2023207589 A1 WO 2023207589A1
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WO
WIPO (PCT)
Prior art keywords
carrier
information
network device
terminal device
message
Prior art date
Application number
PCT/CN2023/087774
Other languages
English (en)
French (fr)
Inventor
李锐杰
官磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of WO2023207589A1 publication Critical patent/WO2023207589A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present application relate to the field of wireless communications, and more specifically, to an information transmission method and a communication device.
  • One of the main technical means to reduce the energy consumption of network equipment is to reduce the transmission of signals by network equipment.
  • the network device needs to periodically send public information on each carrier so that the terminal device can identify the network device on each carrier, so that the terminal device can access the network on each carrier.
  • the network device Even if the network device has no data to transmit, the network device still needs to periodically send some public information.
  • This public information can be used by the terminal device to identify the network device, thereby allowing the terminal device to access the network. How to reduce the energy consumption overhead caused by public information is an issue worth considering.
  • This application provides an information transmission method and communication device to reduce energy consumption overhead caused by periodic transmission of public information by network equipment.
  • the first aspect provides an information transmission method, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, which is not limited in this application.
  • the method may include: receiving first information from the network device through the first carrier, where the first information includes at least one of the following: resource information used by the network device to access the network device through the second carrier, part or all of the first public information Information, resource information of second public information transmitted through the second carrier, wherein the first public information and the second public information are used to access the network device through the second carrier; messages are transmitted with the network device through the second carrier.
  • the network device can send some public information required by the terminal device when accessing the network device through the second carrier to the terminal device through the first carrier, so that the terminal device can transmit information through the second carrier when there is a need.
  • the network equipment does not need to transmit information on the second carrier
  • the terminal equipment does not need to access the network through the second carrier
  • the network equipment does not need to transmit information on the second carrier.
  • Public information is frequently sent on the second carrier. Compared with the network device always periodically sending public information on the second carrier, the overhead of the network device sending public information can be reduced.
  • the first public information is system information including configuration information of the primary cell.
  • the second public information is information used for cell search, or the second public information is information used for downlink synchronization.
  • the first public information is used for the terminal device and the network device to synchronize on the second carrier.
  • the second public information is used for the terminal device to randomly access the network device.
  • the first information further includes a time window, and the time window is a valid time range for detecting a signal sent by the network device through the second carrier.
  • the terminal device can detect the signal sent by the network device through the second carrier within the time window. Outside the time window, the terminal device does not need to detect the signal sent by the network device through the second carrier. By configuring the time window, you can avoid the excessive delay caused by the terminal device always detecting the signal sent by the network device through the second carrier, and improve the experience of the terminal device.
  • the first information also includes the frequency domain position of the second carrier.
  • the terminal device can learn the frequency domain range of the second carrier, and then can transmit messages with the network device through the second carrier.
  • transmitting messages with the network device through the second carrier includes: receiving part or all of the first public information through the second carrier, and/or, through the second carrier Receive second public information.
  • the method further includes: sending a first message to the network device through the first carrier, the first message being used to indicate access to the network device through the second carrier, wherein, The time-frequency resource and/or sequence of the first message is determined based on the first information.
  • the first message is message 1 (Msg1) in the random access process.
  • the terminal device can notify the network device through the first message that it needs to access the network through the second carrier, or that it can notify the network device through the first message that it needs to transmit information through the second carrier.
  • the network device may send the second information to the terminal device on the second carrier, thereby avoiding the network device from frequently and periodically sending the second information on the second carrier and reducing the need for the network device to perform the second message on the second carrier. signaling overhead on the carrier and reduce energy consumption of network equipment on the second carrier.
  • the method further includes: receiving second information from the network device through the second carrier, where the second information includes at least one of the following information: a response message to the first message , scheduling the downlink control information of the response message of the first message, or scheduling the downlink control information of the second public information.
  • the response message of the first message is message 2 (Msg2) in the random access process.
  • the method further includes: performing beam training according to the second information.
  • the terminal device performs beam training according to the second information.
  • the second information includes multiple pieces of information, and beam training is completed based on the multiple pieces of information.
  • the message is transmitted with the network device through the second carrier, It includes: sending a second message to the network device through the second carrier, and the second message is used to access the network device.
  • the second message is a random access request when accessing the network device through the second carrier.
  • the second message is Msg1.
  • the method before sending the second message to the network device through the second carrier, the method further includes: receiving the second public information from the network device through the second carrier;
  • the carrier sending the second message to the network device includes: sending the second message to the network device through the second carrier according to the second public information and the first information.
  • the method further includes: receiving third public information from the network device through a second carrier; and sending a message to the network device through the second carrier according to the second public information and the first information.
  • the network device sends the second message, including: sending the second message to the network device through the second carrier according to the second public information, the first information, and the third public information; wherein the third public information includes the first public information. All information; or, the first information includes part of the information in the first public information, and the third public information includes information in the first public information except part of the information.
  • the first public information can be transmitted on the first carrier, so that the first public information does not need to be transmitted frequently on the second carrier; or part of the information in the first public information is transmitted on the first carrier, and the second carrier The remainder is transmitted on the carrier. In this way, the signaling overhead and energy consumption caused by transmitting the first public information on the second carrier can be reduced.
  • the method further includes: after sending the second message to the network device through the second carrier, the method further includes: receiving a second message from the network device through the second carrier. Public information and/or response message to the second message.
  • the response message of the second message is Msg2, or the response message of the second message is a random access response.
  • transmitting a message with a network device through a second carrier includes: sending a third message to the network device through the second carrier, the time-frequency resources used by the third message and /Or the sequence is determined based on the first information, and the third message is used to access the network device.
  • the method before transmitting the message with the network device through the second carrier, the method further includes: sending indication information to the network device through the first carrier, the indication information being used to indicate whether to transmit the message through the first carrier.
  • Accessing the network device through the second carrier; transmitting the message with the network device through the second carrier includes: when the indication information is used to indicate access to the network device through the second carrier, transmitting the message with the network device through the second carrier.
  • the terminal device can indicate to the network device whether to access the network device through the second carrier.
  • the terminal device accesses the network device through the second carrier, the terminal device transmits messages with the network device through the second carrier.
  • the indication information includes information indicating whether to access the network device through the second carrier.
  • the resource of the indication information indicates whether the network device is accessed through the second carrier.
  • the resource sending the indication information can indicate to the network device whether the terminal device accesses the network device through the second carrier, that is, the resource implicitly indicates whether the terminal device accesses the network device through the second carrier.
  • the resource transmitting the indication information is the first resource
  • the first resource is used by the network device to determine that the terminal device accesses the network device through the second carrier
  • the resource transmitting the indication information is the second resource
  • the second resource is used by the network device to determine that the terminal device accesses the network device through the first carrier.
  • the method further includes: receiving a first synchronization signal from the network device through the first carrier; and performing uplink synchronization according to the first synchronization signal.
  • the method further includes: receiving a second synchronization signal from the network device through a second carrier; performing downlink synchronization according to the second synchronization signal; or, performing downlink synchronization according to the second synchronization signal.
  • the signal and offset are used for uplink synchronization, where the offset is used to characterize the offset between the received first synchronization signal and the second synchronization signal.
  • the method further includes: receiving an offset from the network device through the second carrier.
  • the offset is carried in a third message, and the third message is used to access the network device.
  • the third message carrying the offset may be Msg2 or Msg4.
  • the second aspect provides an information transmission method, which can be executed by a network device, or can also be executed by a component of the network device (such as a chip or a circuit), which is not limited in this application.
  • the method may include: sending first information to the terminal device through the first carrier, where the first information includes at least one of the following: resource information used by the access network device through the second carrier, part or all of the information in the first public information , resource information when transmitting the second public information through the second carrier, wherein the first public information and the second public information are used to access the network device through the second carrier; and transmit messages with the terminal device through the second carrier.
  • the first public information is system information including configuration information of the primary cell.
  • the second public information is information used for cell search, or the second public information is information used for downlink synchronization.
  • the first information further includes a time window, where the time window is a valid time range for detecting signals sent by the network device through the second carrier.
  • the first information also includes the frequency domain position of the second carrier.
  • transmitting a message with the terminal device through the second carrier includes: sending part or all of the first public information to the terminal device through the second carrier, and/or, The second carrier sends second public information to the terminal device.
  • the method further includes: receiving a first message from the terminal device through the first carrier, the first message being used to indicate access to the network device through the second carrier, wherein , the time-frequency resource and/or sequence of the first message is determined based on the first information.
  • the method further includes: sending second information to the terminal device through the second carrier, where the second information includes at least one of the following information: a response message to the first message, The downlink control information of the response message of the first message is scheduled, or the downlink control information of the second public information is scheduled.
  • a second message from the terminal device is received through the second carrier, and the second message is used to access the network device.
  • the method further includes: sending second public information to the terminal device through the second carrier.
  • the method further includes: sending third public information to the terminal device through the second carrier; wherein the third public information includes all the information in the first public information; Alternatively, the first information includes partial information in the first public information, and the third public information includes information other than the partial information in the first public information.
  • the method further includes: receiving the second public information from the network device through the second carrier and /or the response message of the second message.
  • the method before transmitting the message with the terminal device through the second carrier, the method further includes: receiving indication information from the terminal device through the second carrier, the indication information being used to indicate whether Accessing the network device through the second carrier; transmitting the message with the terminal device through the second carrier includes: when the indication information is used to indicate access to the network device through the second carrier, transmitting the message with the terminal device through the second carrier.
  • the indication information includes information indicating whether to access the network device through the second carrier.
  • the resource of the indication information indicates whether the network device is accessed through the second carrier.
  • the method further includes: sending a first synchronization signal to the terminal device through the first carrier; sending a second synchronization signal to the terminal device through the second carrier, and the second synchronization signal is The signal is used for downlink synchronization; wherein, the first synchronization signal is used for uplink synchronization, or the second synchronization signal and offset are used for uplink synchronization, and the offset is used to represent the difference between receiving the first synchronization signal and the second synchronization signal. offset.
  • the offset is sent to the terminal device through the second carrier.
  • the offset is carried in a third message, and the third message is used to access the network device.
  • the third message carrying the offset may be Msg2 or Msg4.
  • an information transmission method is provided, which method can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, which is not limited in this application.
  • a component such as a chip or circuit
  • the following description takes execution by a terminal device as an example.
  • the method may include: the terminal device sends indication information to the network device through the first carrier, the indication information being used to instruct the network device that the terminal device accesses the network device through the second carrier; and the terminal device receives messages from the network device through the second carrier.
  • the terminal device receives the message from the network device through the second carrier.
  • the terminal device transmits the message with the network device through the second carrier.
  • the terminal device can send an instruction message to the network device. After receiving the instruction from the terminal device, the network device sends the message to the terminal device on the second carrier. In this way, there is no need to frequently transmit messages on the second carrier, which reduces signaling overhead on the second carrier and reduces energy consumption overhead caused by frequent message transmission on the second carrier.
  • the terminal device transmits the signal to the network device through the first carrier. Before sending the indication information, the method further includes: the terminal device receives a synchronization signal from the network device through the first carrier.
  • the indication information includes information instructing the terminal device to access the network device through the second carrier.
  • the resource of the indication information is used to instruct the network device that the terminal device accesses the network device through the second carrier.
  • the method before the terminal device receives the message from the network device through the second carrier, the method further includes: the terminal device receives the first information from the network device through the first carrier,
  • the first information includes at least one of the following: resource information used by the terminal device to access the network device through the second carrier, part or all of the information in the first public information, and resource information when transmitting the second public information through the second carrier,
  • the first public information and the second public information are used for the terminal device to access the network device through the second carrier.
  • the fourth aspect provides an information transmission method, which can be executed by a network device, or can also be executed by a component of the network device (such as a chip or a circuit), which is not limited in this application.
  • a component of the network device such as a chip or a circuit
  • the following description takes execution by a network device as an example.
  • the method may include: the network device receives indication information from the terminal device through the first carrier, the indication information being used to instruct the network device that the terminal device accesses the network device through the second carrier; and the network device transmits messages with the terminal device through the second carrier.
  • the method before the network device receives the indication information from the terminal device through the first carrier, the method further includes: the network device sends a synchronization signal to the terminal device through the first carrier.
  • the indication information includes information instructing the terminal device to access the network device through the second carrier.
  • the resource of the indication information is used to instruct the network device that the terminal device accesses the network device through the second carrier.
  • the method before the network device transmits the message to the terminal device through the second carrier, the method further includes: the network device sends the first information to the terminal device through the first carrier, the first The information includes at least one of the following: resource information used by the terminal device to access the network device through the second carrier, part or all of the information in the first public information, and resource information when transmitting the second public information through the second carrier, where, The first public information and the second public information are used by the terminal device to access the network device through the second carrier.
  • the fifth aspect provides an information transmission method, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, which is not limited in this application.
  • a component such as a chip or circuit
  • the following description takes execution by a terminal device as an example.
  • the method may include: the terminal device receives a first synchronization signal from the network device through a first carrier; the terminal device receives a second synchronization signal from the network device through a second carrier; the terminal device performs downlink synchronization according to the second synchronization signal; the terminal device Perform uplink synchronization based on the first synchronization signal, or the terminal device performs uplink synchronization based on the second synchronization signal and an offset, where the offset is used to represent the offset between the first synchronization signal and the second synchronization signal received by the terminal equipment. shift.
  • the method further includes: the terminal device receives an offset from the network device through the second carrier.
  • the offset is carried in a third message, and the third message is used for the terminal device to access the network device.
  • the sixth aspect provides an information transmission method.
  • the method can be executed by a network device, or can also be executed by a component of the network device (such as a chip or a circuit).
  • This application is not limited to this.
  • the following description takes execution by a network device as an example.
  • the method may include: the network device sends a first synchronization signal to the terminal device through a first carrier; the network device sends two synchronization signals to the terminal device through a second carrier, the second synchronization signal is used for downlink synchronization; wherein, the first synchronization signal The signal is used for uplink synchronization, or the second synchronization signal and the offset are used for uplink synchronization, and the offset is used to represent the offset between the received first synchronization signal and the second synchronization signal.
  • the network device sends the offset to the terminal device through the second carrier.
  • the offset is carried in a third message, and the third message is used for the terminal device to access the network device.
  • a communication device which is used to perform the method in any of the possible implementation manners of the above-mentioned first to sixth aspects.
  • the device may include units and/or modules for performing the method in any possible implementation of the first to sixth aspects, such as a processing unit and/or a communication unit.
  • the device is a communication device (such as a network device or a terminal device).
  • the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the device is a chip, chip system or circuit used in communication equipment (such as network equipment, such as terminal equipment).
  • the communication unit may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip, chip system or circuit, etc.
  • the processing unit may be at least one processor, processing circuit or logic circuit, etc.
  • An eighth aspect provides a communication device, which includes: at least one processor configured to execute computer programs or instructions stored in a memory to perform the method in any of the possible implementations of the first to sixth aspects.
  • the device further includes a memory for storing computer programs or instructions.
  • the device further includes a communication interface, through which the processor reads the computer program or instructions stored in the memory.
  • the device is a communication device (such as a network device or a terminal device).
  • the device is a chip, chip system or circuit used in communication equipment (such as network equipment, such as terminal equipment).
  • the present application provides a processor for executing the methods provided in the above first to sixth aspects.
  • processor output, reception, input and other operations can be understood as processor output, reception, input and other operations.
  • transmitting and receiving operations performed by the radio frequency circuit and the antenna, which is not limited in this application.
  • a computer-readable storage medium stores a program code for device execution.
  • the program code includes a method for executing any of the possible implementations of the above-mentioned first to sixth aspects. method.
  • a computer program product containing instructions is provided.
  • the computer program product When the computer program product is run on a computer, it causes the computer to execute the method in any one of the possible implementation modes of the first to sixth aspects.
  • a communication system including at least one of the aforementioned network devices and at least one of the aforementioned terminal devices.
  • Figure 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.
  • Figure 2 is another schematic diagram of a wireless communication system suitable for embodiments of the present application.
  • Figure 3 is a schematic diagram of SSB in the time domain and frequency domain.
  • FIG 4 is a schematic diagram of timing advance (time advance, TA).
  • FIG. 5 is a schematic diagram of an information transmission method 500 provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an information transmission method 600 provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of TA mismatch.
  • Figure 8 is a schematic diagram of timing synchronization applicable to the embodiment of the present application.
  • Figure 9 is a schematic diagram of a communication device 900 provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of another communication device 1000 provided by an embodiment of the present application.
  • Figure 11 is a schematic diagram of a chip system 1100 provided by an embodiment of the present application.
  • the technical solutions provided by this application can be applied to various communication systems, such as fifth generation (5th generation, 5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division Duplex (frequency division duplex, FDD) system, LTE time division duplex (TDD) system, etc.
  • the technical solution provided by this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system.
  • the technical solution provided by this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type Communication (machine type communication, MTC), and Internet of Things (Internet of things, IoT) communication systems or other communication systems.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • MTC machine type Communication
  • Internet of Things Internet of things, IoT
  • the terminal equipment in the embodiment of this application may also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal , communications equipment, wireless communications equipment, user agent or user device.
  • UE user equipment
  • the terminal device may be a device that provides voice/data to users, such as a handheld device with wireless connection function, a vehicle-mounted device, etc.
  • terminals are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality, AR) equipment, mixed reality (MR) equipment, wireless terminals in industrial control, wireless terminals in self-driving or smart driving, remote medical surgery ) in wireless terminals and smart grids
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the device used to implement the functions of the terminal device may be a terminal device, or may be a device capable of supporting the terminal device to implement the function, such as a chip system or a chip, and the device may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the network device in the embodiment of the present application may be a device used to communicate with a terminal device.
  • the network device may also be called an access network device or a wireless access network device.
  • the network device may be a base station.
  • the network device in the embodiment of this application may refer to a radio access network (radio access network, RAN) node (or device) that connects the terminal device to the wireless network.
  • radio access network radio access network, RAN node (or device) that connects the terminal device to the wireless network.
  • the base station can broadly cover various names as follows, or be replaced with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmitting point (TP), primary station, secondary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, interface Ingress node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (active antenna) unit, AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning node, etc.
  • NodeB Node B
  • eNB evolved base station
  • next generation NodeB next generation NodeB, gNB
  • relay station Access point
  • transmission point transmitting and receiving
  • the base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip used in the aforementioned equipment or devices.
  • the base station can also be a mobile switching center and equipment that performs base station functions in D2D, V2X, and M2M communications, network-side equipment in 6G networks, equipment that performs base station functions in future communication systems, etc.
  • Base stations can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone may be configured to act as a mobile base station, and one or more cells may move based on the mobile base station's location.
  • a helicopter or drone may be configured to serve as a device that communicates with another base station.
  • the network device mentioned in the embodiments of this application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU- CP)) and user plane CU nodes (central unit-user plane (CU-UP)) and DU node equipment.
  • CU- CP central unit-control plane
  • CU-UP central unit-user plane
  • Network equipment and terminal equipment can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky. In the embodiments of this application, the scenarios in which network devices and terminal devices are located are not limited.
  • FIG 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.
  • the wireless communication system may include a wireless access network 100.
  • the wireless communication system also includes a core network 200.
  • the wireless communication system also includes the Internet 300.
  • the radio access network 100 may include at least one radio access network device (110a and 110b in Figure 1), and may also include at least one terminal (120a-120j in Figure 1).
  • the terminal is connected to the wireless access network equipment through wireless means, and the wireless access network equipment is connected to the core network through wireless or wired means.
  • the core network equipment and the radio access network equipment can be independent and different physical devices, or the functions of the core network equipment and the logical functions of the radio access network equipment can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of wireless access network equipment. Terminals and terminals and wireless access network equipment and wireless access network equipment can be connected to each other in a wired or wireless manner.
  • Figure 1 is only a schematic diagram.
  • the communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Figure 1 .
  • Wireless access network equipment can be a base station, an evolved base station (evolved NodeB, eNodeB), a transmission reception point (TRP), or the next generation of the fifth generation (5th generation, 5G) mobile communication system.
  • Base station (next generation NodeB, gNB), the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also complete the base station part
  • a functional module or unit for example, can be a centralized unit (CU) or a distributed unit (DU).
  • the CU here completes the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also complete the functions of the service data adaptation protocol (SDAP); DU completes the functions of the base station
  • the functions of the wireless link control layer and medium access control (MAC) layer can also complete some or all of the physical layer functions.
  • the wireless access network equipment may be a macro base station (110a in Figure 1), a micro base station or an indoor station (110b in Figure 1), or a relay node or donor node.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the wireless access network equipment.
  • the following description takes a base station as an example of a radio access network device.
  • the terminal can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the terminal.
  • Base stations and terminals can be fixed-location or mobile. Base stations and terminals can be deployed on land, Including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water; it can also be deployed on aircraft, balloons and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.
  • the helicopter or drone 120i in Figure 1 may be configured as a mobile base station.
  • the terminal 120i is Base station; but for base station 110a, 120i is a terminal, that is, communication between 110a and 120i is through a wireless air interface protocol.
  • communication between 110a and 120i can also be carried out through an interface protocol between base stations.
  • relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively called communication devices.
  • 110a and 110b in Figure 1 can be called communication devices with base station functions
  • 120a-120j in Figure 1 can be called communication devices with terminal functions.
  • Communication between base stations and terminals, between base stations and base stations, and between terminals can be carried out through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and unlicensed spectrum at the same time; it can communicate through 6,000 It can communicate using spectrum below gigahertz (GHz), it can also communicate through spectrum above 6GHz, and it can also communicate using spectrum below 6GHz and spectrum above 6GHz at the same time.
  • GHz gigahertz
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the functions of the base station may also be performed by modules (such as chips) in the base station, or may be performed by a control subsystem that includes the base station functions.
  • the control subsystem containing base station functions here can be the control center in the above application scenarios such as smart grid, industrial control, smart transportation, smart city, etc.
  • the functions of the terminal can also be performed by modules in the terminal (such as chips or modems), or by a device containing the terminal functions.
  • FIG. 1 is only a simplified schematic diagram for ease of understanding.
  • the wireless communication system may also include other network devices or other terminal devices, which are not shown in FIG. 1 .
  • the embodiments of this application can be applied to any communication scenario in which the sending device and the receiving device communicate.
  • FIG 2 is another schematic diagram of a wireless communication system suitable for embodiments of the present application.
  • the wireless communication system may include a receiving end device and a transmitting end device.
  • the receiving device may be a terminal device, such as the terminal device 120 shown in Figure 1;
  • the sending device may be a network device, such as the network device 110 shown in Figure 1.
  • the sending device can send a synchronization signal block (SSB) and system information block 1 (SIB1) to the receiving device.
  • SSB synchronization signal block
  • SIB1 system information block 1
  • the receiving device receives or detects the SSB and SIB1; if the receiving device After the device receives SSB and SIB1, it can perform initial access.
  • the terminal device mentioned in the embodiment of this application performs initial access, which means that the terminal device can perform operations related to initial access based on the received information, such as SSB and SIB1, and does not limit the terminal device to be successful. Access network equipment.
  • FIG. 2 is only a simplified schematic diagram for ease of understanding.
  • the wireless communication system may also include more steps, which are not shown in FIG. 2 .
  • a beam can be understood as a spatial domain filter, or spatial filter, or spatial parameter, or spatial domain behavior.
  • the beam used to transmit a signal may be called a transmit beam (transmission beam, Tx beam), can be called spatial domain transmission filter (spatial domain transmission filter) or spatial transmission parameter (spatial transmission parameter), or transmit spatial domain behavior;
  • the beam used to receive signals can be called reception beam (reception beam) , Rx beam), can be called a spatial domain receive filter (spatial domain receive filter) or spatial receive parameter (spatial RX parameter), or receive spatial domain behavior.
  • the transmit beam can also refer to the distribution of signal strength in different directions in space after the signal is emitted by the antenna; similarly, the receive beam can also refer to the signal strength distribution of the wireless signal received from the antenna in different directions in space. .
  • the beam may be a wide beam, a narrow beam, or other types of beams.
  • the beam forming technology may be beam forming technology or other technologies.
  • the beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital/analog beamforming technology.
  • Synchronization signal block (SSB)
  • SSB can include two parts, namely synchronization signal (SS) and physical broadcast channel block (PBCH).
  • SS can include primary synchronization signal (primary synchronization signal, PSS) and secondary synchronization signal (secondary synchronization signal, SSS). Therefore, SSB can also be considered to include three parts, that is, SSB includes PSS, SSS, and PBCH, which is not limited.
  • Figure 3 is a schematic diagram of SSB in the time domain and frequency domain.
  • SSB can occupy 4 consecutive symbols in the time domain in the time domain, and can occupy 20 resource blocks (RB) in the frequency domain, that is, 240 subcarriers (SC).
  • RB resource blocks
  • SC subcarriers
  • SSB can be used to implement the following functions: 1) Cell synchronization and acquisition of master information block (MIB); 2) Network equipment side beam training. A brief introduction below.
  • MIB master information block
  • PSS and SSS in SSB can carry the physical cell identifier (PCI), and the terminal device obtains PCI by detecting PSS and SSS; in addition, the PBCH in SSB can carry SSB index (index ), each SSB index corresponds to a location that sends the SSB. By detecting the SSB index and detecting the time when the SSB is received, cell synchronization can be completed.
  • the MIB can be carried in the PBCH in SSB, so the MIB can also be obtained based on SSB.
  • An SSB pattern can contain multiple SSB indexes. Different SSB indexes correspond to different transmission beams of network equipment.
  • the terminal equipment can select the transmission beam corresponding to the SSB with better quality by detecting the SSB. This completes beam training.
  • the terminal device can also use multiple receiving beams to receive the same SSB to complete the receiving beam training on the terminal device side.
  • the SSB with better quality is SSB 1
  • SSB1 corresponds to the transmit beam 1 of the network device as an example. Further introduction.
  • the functions of the transmit beam 1 mainly include: 1) The terminal device receives the SIB1 or paging sent by the network device through the transmit beam 1 at the position corresponding to SSB 1, thereby improving the coverage of SIB1 or paging; 2) The terminal device receives the SIB1 or paging at the position corresponding to the SSB 1 sends a physical random access channel (PRACH) to the corresponding location, and the network device can use beam 1 to receive the above PRACH, improving the probability of successful PRACH reception; 3) When the terminal device completes the initial access, establish wireless resource control (radio After resource control (RRC) is connected, the network device can perform more fine-grained beam training based on beam 1, reducing the cost of fine beam training.
  • RRC resource control
  • the terminal device Before the terminal device detects the SSB, it is generally unable to determine the specific time-frequency resource location of the SSB. In other words, the terminal device needs to blindly detect the SSB.
  • One implementation method is to predefine the frequency domain interval used for blind detection of SSB, that is, a synchronization raster.
  • the synchronization raster has different sizes in different frequency bands.
  • Frequency domain bits of SSB The setting can be defined by a synchronization grid, and the terminal device can detect SSBs one by one at synchronization grid intervals to obtain the information needed to access the network.
  • SIB System information block
  • SIB1 System cells are broadcast through system information blocks, which group system cells of the same type together.
  • the system information in this application can be SIB1.
  • the main function of SIB1 is to complete the configuration of the primary cell (PCell), so that terminal equipment in the idle state can monitor paging messages, or to facilitate terminal equipment to complete uplink timing synchronization through random access, thereby entering the connection ( connected) state.
  • SIB1 is generally carried on the physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • network equipment can indicate to the terminal equipment the time-frequency location and transmission parameters of the PDSCH carrying SIB1 through downlink control information (DCI).
  • DCI downlink control information
  • the candidate time domain location and frequency domain location of the above-mentioned DCI can be indicated through the MIB.
  • the MIB contains a 4-bit control resource set zero (CORESET0) and a 4-bit common search space zero (CSS0), where CORESET0 is used to indicate the DCI for scheduling SIB1
  • CORESET0 is used to indicate the DCI for scheduling SIB1
  • the candidate frequency domain location where CSS0 is located is used to indicate the candidate time domain location where the DCI scheduling SIB1 is located.
  • the network device can use the same beam used to send SSB to send SIB1 corresponding to SSB.
  • the terminal device when the terminal device receives SIB1, it can use the same beam used to receive SSB to receive SIB1 corresponding to SSB.
  • the SIB1 corresponding to the SSB indicates that the MIB in the SSB is used to indicate the frequency domain location and time domain location of the DCI that schedules the SIB1.
  • SIB1 can be considered as the remaining minimum system information (RMSI), or SIB1 can also be considered as the first system message sent after the MIB, or SIB1 can also be considered as including the random access channel
  • the system message of the time-frequency resource indication information of (random access channel, RACH), or SIB1 can also be considered as the information carried in the PDSCH scheduled by the physical downlink control channel (physical downlink control channel, PDCCH) determined according to CORESET0 and CSS0.
  • RMSI remaining minimum system information
  • PDCCH physical downlink control channel
  • SIB1 and SSB are only illustrative descriptions, which do not limit the scope of protection of the embodiments of the present application.
  • RACH and PRACH are sometimes used interchangeably, and they represent the same meaning when the difference is not emphasized.
  • Public information can also be called public signals or non-dedicated information. It can be understood as information sent by one communication device to multiple communication devices. Taking the communication system shown in Figure 1 as an example, public information can be understood as information sent by network equipment to the community. Information of multiple terminal devices or a terminal device group, or understood as information that the network device does not specifically send to a terminal device or a terminal device group in the community, or understood as information of multiple terminal devices or terminal devices in the community Information that a terminal device group can use together. For example, public information can be system information, synchronization signals, etc.
  • the terminal device can perform random access through the information contained in SIB1.
  • Four-step random access is only a name used to represent a random access method, and its specific name does not limit the scope of the embodiments of the present application.
  • Four-step random access means that four-step information exchange (Msg1, Msg2, Msg3, Msg4) is required between the terminal device and the network device.
  • Msg1, Msg2, Msg3, Msg4 is required between the terminal device and the network device.
  • the basic flow of the four-step random access process is as follows.
  • Step 1 The terminal device sends a random access preamble (preamble), which may also be called Msg1, to the network device.
  • preamble which may also be called Msg1
  • the terminal device obtains the random access configuration information.
  • the random access configuration information includes the time-frequency resources (such as RACH time-frequency resources) used by the terminal device to send the random access preamble, and the time-frequency resources used to send the random access preamble. sequence, the terminal device sends a random access preamble to the network device on this time-frequency resource.
  • the purpose of the random access preamble is to notify the network device that there is a random access request, so that the network device can estimate the transmission delay with the terminal device to calibrate the uplink timing.
  • the network device may be configured with multiple RACH occasions. Which RACH occasion the terminal device selects, which preamble is sent, and which transmit beam is used can be determined based on the measurement results of the SSB index.
  • One possible implementation method is that there is a corresponding relationship between SSB index and ⁇ RACH occasion, preamble index ⁇ . If the terminal device determines SSB, it can determine the corresponding RACH occasion and preamble index. Among them, preamble index represents the sequence index of random access.
  • the terminal device measures the SSB sent by the network device, such as measuring the signal received power (RSRP) of the SSB; the terminal device can select the RSRP to be greater than a preset threshold (the preset threshold can be configured by a higher layer, for example) Or it can be the SSB index defined by the protocol).
  • a preset threshold can be configured by a higher layer, for example
  • the SSB index can be the SSB index defined by the protocol.
  • Step 2 The network device sends a random access response (RAR) to the terminal device, which can also be called Msg2. Specifically, after detecting the random access preamble, the network device sends Msg2 to the terminal device.
  • RAR random access response
  • RAR The main functions of RAR include: 1) sending initial uplink transmission TA to assist terminal equipment in completing uplink timing synchronization; 2) sending temporary cell radio network temporary identifier (TC-RNTI), after the initial access is completed It currently replaces the cell radio network temporary identifier (C-RNTI) for use by terminal equipment; 3) Sends an uplink grant (UL grant) (i.e., uplink resource allocation), which is used to schedule a physical uplink shared channel (physical uplink shared channel, PUSCH) transmission to carry the subsequent sending of Msg3.
  • UL grant i.e., uplink resource allocation
  • Step 3 The terminal device sends Msg3 to the network device. Specifically, after receiving Msg2, the terminal device first adjusts the uplink timing according to the timing advance instruction, and sends an uplink message, also called Msg3, on the uplink resources allocated by Msg2 according to Msg2. If multiple terminal devices select the same random access preamble in step 1, resource conflicts will result. For example, if the random access preamble of one terminal device among the plurality of terminal devices is correctly received by the network device, and the network device sends Msg2 to the terminal device, all of the plurality of terminal devices can receive the Msg2. The multiple terminal devices cannot determine through Msg2 which terminal device the network device has received the random access preamble of. At this time, these terminal devices may receive Msg2 and send Msg3 respectively. Therefore, Msg3 includes the unique identification of the terminal device and is used to resolve resource conflicts.
  • Step 4 The network device sends the conflict resolution to the terminal device. Specifically, the network device receives Msg3 from the terminal device and returns a conflict resolution message, which may also be called Msg4, to the terminal device that has successfully accessed. The network device will carry the unique identifier in Msg3 in the conflict resolution message to specify the terminal device that has successfully accessed, while other terminal devices that have not successfully accessed will re-initiate random access.
  • Msg3 conflict resolution message
  • Msg4 conflict resolution message
  • the network device can configure the time-frequency resources for the terminal device to send or receive signals. To determine the sending or receiving of a signal Time, the terminal device needs to use the downlink signal for timing synchronization to match the time boundary of the network device.
  • Downlink reference signals can generally be used for timing synchronization, and the reference signals used for timing synchronization can be called timing anchor points.
  • the downlink reference signal may be SSB, cell reference signal (cell reference signal, CRS), etc.
  • Downlink timing anchors can also be used to determine the timing of uplink transmissions.
  • the terminal device After the terminal device determines the boundary of the downlink subframe through the downlink timing signal, it can send the uplink signal according to the same time reference system.
  • the network device can configure a TA for each terminal device. The terminal device sends the uplink signal in advance according to the TA based on the downlink timing synchronization. In this way, the uplink signal sent by the terminal device reaches the network device at the same time as The upstream receive timing of network devices can be aligned.
  • Figure 4 is a schematic diagram of TA.
  • the frame boundary is at time A, so gNB uses time A as the reference point to send SSB.
  • Time A can also be understood as the starting point for sending SSB.
  • the UE synchronizes the frame according to the received SSB timing.
  • the boundary is point B, so the UE sends RACH with time B as the reference point.
  • Time B can also be understood as the starting point of sending RACH.
  • gNB receives RACH with time C as the reference point.
  • Time C It can also be understood as the time when the base station receives the RACH.
  • Different UEs have different distances from gNB, and the speed of signal transmission through electromagnetic waves is basically the same.
  • gNB may cause gNB to have different reference points when receiving RACH from different terminal devices.
  • the above situation can be avoided through TA.
  • gNB can configure different TAs for different UEs, so that the data sent by all UEs reaches the network device at the same time (moment A in Figure 4).
  • a carrier can be understood as a frequency domain range, a bandwidth area, or a frequency domain unit.
  • the frequency domain unit can be understood as a measurement unit of resources occupied by information resources in the frequency domain.
  • the first carrier and the second carrier in this application can also be understood as the first frequency domain range and the second frequency domain range.
  • the following takes the first carrier and the second carrier as examples for detailed introduction.
  • the first carrier may also be called the basic carrier.
  • the terminal device when the terminal device is in an idle state or an inactive state, it can receive public information sent by the network device through the first carrier.
  • the first carrier can also be understood as a public carrier.
  • Network equipment always needs to periodically or frequently send public signals on the first carrier, which is used by terminal equipment to identify network equipment and obtain the carrier required for terminal equipment to access the network. information and/or public information.
  • the first carrier satisfies at least one of the following: low power consumption, slow rate, and small bandwidth.
  • the second carrier which may also be called an energy-saving carrier, for example, compared with the first carrier, the second carrier satisfies at least one of the following: high power consumption, fast speed, and large bandwidth.
  • the network device if the terminal device needs to transmit information through the second carrier, that is, when the terminal device transmits information to the network device through the second carrier, the network device then transmits the information on the second carrier.
  • the network device if the terminal device needs to access the network device through the second carrier, that is, when the terminal device will access the network device through the second carrier, the network device will then send a public signal on the second carrier, and the public signal can be used by the terminal device. Access network equipment through the second carrier.
  • the first carrier and the second carrier can be carriers with the same frequency emitted by two network devices.
  • the first carrier represents cell 1 under a certain base station
  • the second carrier represents cell 2 under another base station; or it can be a Two carriers with different frequencies emitted by network equipment, such as the first carrier and the second carrier, represent two cells under the same base station, and are not restricted.
  • the following describes several optional situations of the first carrier and the second carrier based on the internal structure of the terminal equipment.
  • the terminal device includes a first module and a second module.
  • the power consumption of the first module is less than the power consumption of the second module.
  • the first carrier may represent a carrier used by the terminal device to transmit signals through the first module
  • the second carrier It can represent the carrier used by the terminal device to transmit signals through the second module.
  • the terminal device can work on the first link or the second link.
  • the terminal device can transmit signals on the first link and can also transmit signals on the second link.
  • the terminal device and the network device can communicate through the first link or through the second link.
  • the first carrier may represent a carrier used by the terminal device to transmit signals on the first link
  • the second carrier may represent a carrier used by the terminal device to transmit signals on the second link.
  • a link represents a connection relationship between a terminal device and a network device, and is a logical concept rather than a physical entity.
  • the terminal device may have different power consumption or communication capabilities in different states.
  • the terminal device may have different power consumption or communication capabilities in different radio resource control (RRC) states.
  • RRC radio resource control
  • the first state and the second state as an example, the power consumption when the terminal device is in the first state may be less than the power consumption when the terminal device is in the second state.
  • the first state may be, for example, the idle state or the inactive state; the second state, for example, may be the connected state.
  • the first carrier may represent a carrier used by the terminal device to transmit signals when it is in the first state
  • the second carrier may represent a carrier used by the terminal device to transmit signals when it is in the second state.
  • the first carrier and the second carrier are described above from different angles. It can be understood that the above exemplary description is provided to facilitate understanding and does not limit the protection scope of the embodiments of the present application.
  • the first carrier and the second carrier are described in the embodiments of the present application.
  • the carrier is not strictly limited, and any two different carriers may be applicable to the embodiment of this application. It can also be understood that in the embodiments of the present application, the method provided by the embodiments of the application is mainly explained in detail by taking the carrier as an example, but this should not constitute any limitation on the application.
  • the carrier in the embodiments of the application can also be replaced by Any of the following: subcarrier, physical resource block (PRB), resource block group (RBG), subband (subband), or bandwidth part (BWP), etc.
  • transmitting a signal on the first carrier and transmitting a signal through the first carrier are sometimes used interchangeably and have the same meaning.
  • Transmitting a signal on a second carrier and transmitting a signal through a second carrier are sometimes used interchangeably and mean the same thing.
  • the network device periodically sends public signals on the first carrier.
  • the network device also periodically sends public signals on the second carrier.
  • the terminal device needs to detect SSB and SIB1 before connecting to the network device.
  • the network device periodically sends SSB and SIB1 on both the first carrier and the second carrier to facilitate the terminal device to identify the network device.
  • the terminal device For SSB, at a candidate frequency domain position of an SSB, the terminal device detects the SSB with a 20ms cycle. When the detection time exceeds 20ms and the terminal device does not detect the SSB, the terminal device may think that the network device is not at the candidate frequency domain position. SSB is sent, so the terminal device may adjust to other candidate frequency domain positions to continue detecting SSB.
  • SIB1 includes information required for random access, such as the time-frequency resources used by the terminal device during the random access process. Therefore, even if the terminal device detects SSB, if the terminal device does not receive SIB1, the terminal device cannot perform random access and needs to continue waiting to receive SIB1. If the cycle for the network device to send SIB1 is too long, it may cause a long delay for the terminal device to access the network device, affecting the experience of the terminal device. Therefore, the period for the network device to send SIB1 is shorter, resulting in greater power overhead.
  • the network device needs to periodically send SSB and SIB1 on each carrier. This will cause a problem. Even if the terminal device does not need to transmit data on some carriers, the network device still needs to send SSB and SIB1 on these carriers, resulting in an increase in energy consumption of the network device.
  • this application proposes a method that can reduce the cost of sending public information through assistance between carriers, thereby reducing the energy consumption of network equipment without affecting the experience of the terminal equipment.
  • the network device can send some public information required by the terminal device when accessing the network device through the second carrier to the terminal device through the first carrier. This can reduce the signal caused by the public information transmitted on the second carrier. This reduces the energy consumption overhead caused by frequent transmission of the above information on the second carrier.
  • the network device after receiving the indication information that the terminal device needs to transmit data through the second carrier, the network device then transmits the public information on the second carrier. This can reduce the cost of the network device transmitting public information on the second carrier.
  • the signaling overhead brought by this method reduces the energy consumption overhead caused by the overall transmission of public information by network equipment.
  • FIG. 5 is a schematic diagram of an information transmission method 500 provided by an embodiment of the present application.
  • Method 500 may include the following steps.
  • the terminal device receives the first information from the network device through the first carrier.
  • the network device sends the first information through the first carrier.
  • the first information may include information required when the terminal device accesses the network device through the second carrier.
  • the first information includes at least one of the following: resource information used by the terminal device to access the network device through the second carrier, part or all of the information in the first public information, and when transmitting the second public information through the second carrier. Resource information.
  • the contents that the first information may include are introduced below.
  • Resource information used by the terminal device to access the network device through the second carrier For convenience of description, the resources used by the terminal device to access the network device through the second carrier are simply called resource #A, that is, the first information includes resource # A's information.
  • the resources in this application can also be understood as time-frequency resources.
  • the information sent by the terminal device through resource #A is used for: initial access, timing synchronization, or carrier wake-up.
  • resource #A may be a RACH resource
  • the terminal device may send a random access preamble to the network device on this resource #A, and the random access preamble is used for initial access. If the terminal device receives the information of resource #A on the first carrier, the terminal device can directly use the resource #A to perform initial access, which reduces the signaling caused by transmitting the information of resource #A on the second carrier. overhead.
  • First public information used for the terminal device to access the network device through the second carrier, or the first public information can be used for the terminal device to perform cell search and synchronization through the second carrier.
  • the first public information can be used to complete the configuration of the cell, to facilitate the terminal equipment in the idle state to monitor the paging message, or to facilitate the terminal equipment in the idle state to complete uplink timing synchronization through random access, thereby entering the connected state.
  • the terminal device receives the first public information on the first carrier, the first public information can be used by the terminal device to access the network device through the second carrier. In this way, the terminal device can directly access the network based on the first public information, reducing The signaling overhead caused by transmitting the first public information on the second carrier.
  • the first public information may include at least one of the following: system information and area identification information.
  • the system information may include, for example: SIB1 and/or MIB.
  • the terminal device may receive part or all of the information in the SIB1 through the first carrier.
  • part of the information in the SIB1 includes one or more of the following: public configuration information of the serving cell, configuration information of terminal equipment timers or counters, and configuration information of universal access control (unified access control, UAC).
  • UAC universal access control
  • the area identification information is used to represent information that can identify the area, that is, the terminal device can obtain the information of the area based on the area identification information.
  • the area identification information may include one or more of the following: tracking area identification, RAN area identification, and cell identification.
  • the network device sends the first public information on the first carrier and does not send the first public information on the second carrier.
  • the first public information is SIB1
  • the terminal device receives the SIB1 on the first carrier. If the terminal device prepares to access the network device through the second carrier, the terminal device based on the SIB1 received on the first carrier, according to the SIB1 contains The information is accessed to the network device through the second carrier.
  • the network device may send the first public information on both the first carrier and the second carrier.
  • the transmission period of the public information sent by the network device on the second carrier may be larger, for example, 40 ms.
  • the first public information is SIB1
  • the terminal device receives the SIB1 on the first carrier. If the terminal device prepares to access the network device through the second carrier, the period of the network device sending the first public signal on the second carrier is relatively large. , if the terminal equipment blindly detects the first public information on the second carrier, the delay will be large. Therefore, the terminal device can access the network device through the second carrier based on the SIB1 received on the first carrier and according to the information contained in the SIB1. This can reduce the delay for the terminal device to detect the first public information and improve system performance.
  • Second public information can be used by terminal equipment to implement at least one of the following functions: downlink synchronization, cell search, beam training, etc.
  • the second public information is SSB.
  • the terminal device may receive resource information for transmitting the SSB through the first carrier. Further, based on the resource information, the terminal device receives the SSB on the second carrier to complete downlink synchronization, cell search, and/or beam training.
  • the second public information is a tracking reference signal (TRS).
  • TRS tracking reference signal
  • the terminal device may receive resource information for transmitting the TRS through the first carrier. According to the resource information, the terminal device can receive the TRS on the second carrier and complete downlink synchronization, cell search and/or beam training based on the TRS.
  • the second public information can be transmitted on both the first carrier and the second carrier.
  • the second public information on the first carrier is second public information to be transmitted on the second carrier.
  • the network device can first send the SSB on the first carrier.
  • the terminal device can send the SSB on the first carrier.
  • the SSB used by the terminal device when accessing the network device through the second carrier may be the SSB received on the first carrier.
  • the terminal device can receive the second public information originally intended to be transmitted on the second carrier through the first carrier, thus reducing the terminal
  • the waiting delay for the device to receive the second public information improves system performance.
  • Resource information when transmitting the second public information through the second carrier may include time-frequency resources used by the terminal device to receive the second public information through the second carrier. . If the terminal device receives the resource information when transmitting the second public information through the second carrier on the first carrier, then when the terminal device receives the second public information on the second carrier, it can directly use the resource information to receive the second public information. information, reducing the signaling overhead caused by transmitting the resource information on the second carrier.
  • the first public information and the second public information may be used by the terminal device to access the network device through the second carrier.
  • the union of the first public information and the second public information includes public information used by the terminal device to access the network device through the second carrier.
  • the terminal device can access the network device through the first public information and the second public information.
  • the terminal device can obtain the cell identity through the second public information and complete downlink timing synchronization; the terminal device can perform random access through part or all of the information in the first public information.
  • the second public information is a synchronization signal
  • the first public information is information other than the synchronization signal among the information used by the terminal device to access the network device.
  • the first public information and the second public information may overlap. In other words, part of the information in the first public information and the second public information is the same.
  • the above description of the first public information and the second public information is an exemplary description and is not limiting.
  • the first public information is SIB1 and the second public information is SSB.
  • the terminal device can obtain the cell identity through the SSB, complete downlink timing synchronization, and obtain the MIB; the terminal device can obtain the potential time-frequency position of the DCI that schedules SIB1 through the MIB; the network device can schedule the PDSCH through the DCI, and the PDSCH carries SIB1;
  • the terminal device blindly detects DCI at the potential time-frequency location. If DCI is detected, it can receive the PDSCH on the time-frequency resource specified by the DCI, thereby obtaining the SIB1 carried by the PDSCH.
  • the terminal device uses the information contained in SIB1, Perform random access.
  • the first information may also include at least one of the following: second public information, a time window, and a frequency domain position of the second carrier.
  • the time window is a valid time range within which the terminal device detects the signal sent by the network device through the second carrier.
  • the frequency domain position of the second carrier represents the frequency domain range of the second carrier.
  • the terminal device transmits the message with the network device through the second carrier.
  • the messages transmitted by the terminal device to the network device through the second carrier in step 520 may be messages required by the terminal device when accessing the network device through the second carrier.
  • the terminal device transmits messages with the network device through the second carrier, which can also be understood as the terminal device accesses the network device through the second carrier.
  • the terminal device can access the network device through the second carrier according to the first information and the second public information.
  • the network device can send some public information required by the terminal device when accessing the network device through the second carrier to the terminal device through the first carrier. This can reduce the need for the network device to transmit public information on the second carrier.
  • the signaling overhead brought by this method reduces the energy consumption overhead caused by the overall transmission of public information by network equipment.
  • the terminal device transmits a message to the network device through the second carrier, which can also be understood as the terminal device accesses the network device through the second carrier, or the terminal device transmits a message to the network device through the second carrier in order to access the network device.
  • the second carrier can also be understood as the terminal device accesses the network device through the second carrier, or the terminal device transmits a message to the network device through the second carrier in order to access the network device.
  • Solution 1 The terminal device sends the first message on the first carrier.
  • the method 500 further includes: the terminal device sends the first message on the first carrier.
  • the first message is used to instruct the terminal device to access the network device through the second carrier, or the first message is used to trigger the terminal device to access the network device through the second carrier, or the first message is used to notify the network device that the terminal device Need to access the network through the second carrier.
  • the first message is Msg1 or preamble in the random access process.
  • the first message is determined based on the first information.
  • the time-frequency resource and/or sequence of the first message is determined based on the first information.
  • the first information includes the information of resource #A
  • the first message is Msg1 or preamble in the random access process
  • the Msg1 uses The time-frequency resource may be determined based on resource #A.
  • the first information includes the second public information, and the terminal device selects the corresponding preamble based on the measurement result of the second public information, and sends the preamble.
  • the second public information may be SSB, for example.
  • the first information is also used to indicate transmitting the first message on the first carrier.
  • the first information includes indication information, which is used to instruct the terminal device to send the first message on the first carrier.
  • the indication information may be SIB1.
  • the network device sends SIB1 on the first carrier. After the terminal device receives the SIB1 on the first carrier, the terminal device determines to send the first message on the first carrier. In another example, it is predefined that if the terminal device receives the first information through the first carrier, the terminal device sends the first message on the first carrier.
  • the terminal device determines to send the first message on the first carrier.
  • the predefined terminal device receives the first information on the first carrier, that is, sends the first message on the first carrier, Or it can be understood that the terminal device is predefined to send the first message on the first carrier.
  • the first message is used to instruct the terminal device to access the network device through the second carrier.
  • Several possible forms of the first message are listed below.
  • the resource of the first message may indicate to the network device that the terminal device accesses the network device through the second carrier. That is, the first message implicitly instructs the terminal device to access the network device through the second carrier.
  • the first message is that if the terminal device uses resource #1 on the first carrier to send the first message to the network device, it means that the terminal device will access the network device through the first carrier; if the terminal device is on the first carrier Using resource #2 to send the first message to the network device indicates that the terminal device will access the network device through the second carrier.
  • the network device learns that the terminal device will access through the first carrier; if the network device receives the first message through resource #2, the network device learns that the terminal device will access Access via the second carrier. Based on solution 1, the terminal device accesses the network device through the second carrier. In solution 1, the terminal device sends the first message on the first carrier, and the resource of the first message is resource #2. Therefore, the first message uses Instructing the terminal device to access the network device through the second carrier.
  • the first message includes information indicating that the terminal device accesses the network device through the second carrier, that is, the information displayed in the first message indicates that the terminal device accesses the network device through the second carrier.
  • the first message includes an indication field that instructs the terminal device to access the network device through the second carrier.
  • the indication field may be implemented by one or more bits. For example, 1 bit is used to indicate whether the terminal device accesses the network device through the second carrier. For example, if this bit is set to "1", it means that the terminal device will access the network device through the second carrier. Further optionally, different status values of one or more bits of the indication field are used to indicate that the network device accesses the network device through or not through the second carrier.
  • bit is set to "1" It means that the terminal device will access the network device through the second carrier. If this bit is set to "0", it means that the terminal device will not access the network device through the second carrier, or it means that the terminal device will access the network device through the first carrier. .
  • the network device learns that the terminal device will access through the first carrier; if the network device If the sequence of the first message received by the device is the second sequence, the network device learns that the terminal device will access through the second carrier.
  • the terminal device sends the first message on the first carrier, and the sequence of the first message is the second sequence. Therefore, the first message is used to instruct the terminal device to access the network device through the second carrier.
  • the network device may send the second information to the terminal device on the second carrier.
  • the first message can also be understood as being used to trigger the network device to send the second information on the second carrier.
  • method 500 further includes: the terminal device receiving second information from the network device on the second carrier.
  • the second information may be used by the terminal device to perform initial access, or to perform operations related to initial access.
  • the second information may be used by the terminal device to perform at least one of the following: transmitting messages related to initial access, uplink synchronization, downlink synchronization, carrier wake-up, and the like.
  • the network device can send the second information to the terminal device on the second carrier after receiving the trigger from the terminal device, that is, after the terminal device sends the first message to the network device. This can save the need for the second information on the second carrier. Power consumption caused by frequent transmission.
  • the second information can be PSS and SSS.
  • the second information includes at least one of the following: first public information, a response message to the first message, downlink control information for scheduling a response message to the first message, or downlink control information for scheduling the second public information. .
  • the second information includes second public information.
  • the second information may not include downlink control information for scheduling the second public information.
  • the second public information included in the second information may be, for example, a synchronization signal, and the synchronization signal may be used for downlink synchronization of the terminal device.
  • the second public information may be SSB.
  • the response message to the first message may be, for example, RAR or Msg2.
  • RAR response signal in response to the first message
  • the downlink control information of the response message of the scheduled first message may be, for example, the DCI corresponding to the RAR.
  • the first public information included in the second information may include the complete first public information; or, if the first information in step 510 includes partial information of the first public information, then the second information includes information other than the first public information. Information outside of this section.
  • the first public information is SIB1.
  • SIB1 in the second information may include the remaining information except this part of the information, or may include the SIB1 All information in . If the second information includes the first public information, based on solution 1, the network device learns that the terminal device will access through the second carrier based on the first message, and the network device can send the first public information to the terminal device on the second carrier.
  • the network device does not always need to periodically send the first public information on the second carrier, but only sends the first public information on the second carrier after being triggered by the terminal device, which can reduce the cost of the network device sending the first public information. Signaling overhead, thereby reducing the overall power consumption of network equipment.
  • the information included in the second information is sent as a whole.
  • the second information includes the response message of the first message and the second public information
  • the second public information is the synchronization signal
  • the response message of the first message is the RAR.
  • the synchronization signal and the RAR can be processed as a block. transmission.
  • the synchronization signal and the DCI corresponding to the RAR can be transmitted as a block.
  • the information included in the second information is sent as a whole. It can also be understood that the information included in the second information is sent at the same time or not at the same time. Furthermore, when sent simultaneously, different information can be encoded independently or jointly, without limitation.
  • the terminal device can detect the second information within the time window. If the terminal device detects the second information within the time window, it can directly use the second information; if the terminal device does not detect the second information within the time window, it can send the second information to the network device on the first carrier. A message to trigger the network device to send the second information. Regarding the triggering function and form of the first message, reference may be made to the first message, which will not be described again here. In this way, the excessive delay caused by the terminal device waiting to detect the second information can be avoided, and the experience of the terminal device can be improved.
  • the terminal device performs beam training according to the second information. For example, if there is multiple second information, the terminal device can use the multiple second information to complete the beam information. For example, refer to the terminology explanation section for the way in which the terminal device completes beam training through SSB. For another example, if there is one piece of second information, then the terminal device can use the same beam used to send the first message to receive the second information. In other words, the beam used by the terminal device to receive the second information is the same as the beam used by the terminal device to send the first message. The same beams are used.
  • the terminal device may be sent on the second carrier according to the second information. Further optionally, the terminal device receives Msg4 on the second carrier.
  • the network device can send the second information to the terminal device on the second carrier after receiving a trigger from the terminal device, that is, after the terminal device sends the first message to the network device.
  • Solution 2 The terminal device sends the second message on the second carrier.
  • method 500 further includes: the terminal device sends a second message on the second carrier.
  • the second message is used for the terminal device to access the network device.
  • the second message is a random access request when the terminal device accesses the network device through the second carrier.
  • the second message is Msg1 or preamble in the random access process.
  • the time-frequency resources and/or sequences used by the second message are determined based on the first information.
  • the first information includes information about resource #A
  • the second message is Msg1 in the random access process.
  • the time-frequency resource used by Msg1 may be determined based on the information about resource #A.
  • the first information includes second public information, and the second public information is SSB, and the second message is Msg1 in the random access process.
  • the terminal device selects the corresponding preamble according to the measurement result of SSB, and sends the preamble.
  • the time-frequency resource and/or sequence of the second message is determined by the SSB detected by the terminal device on the first carrier.
  • the method 500 further includes: the terminal device receives the SSB sent by the network device on the first carrier.
  • the terminal device may determine the second message based on the SSB received on the first carrier.
  • the method 500 further includes: the terminal device receiving second public information from the network device on the second carrier, and sending a second message on the second carrier according to the second public information and the first information.
  • the second public information is, for example, a synchronization signal, and the second public information can be used for the terminal device to perform downlink synchronization.
  • the second public information may be SSB or TRS.
  • method 500 further includes: the terminal device sends a first message on the first carrier, and accordingly, the network device receives the first message.
  • the network device can learn that the terminal device will access through the second carrier based on the first message. Therefore, the network device can send the synchronization signal to the network device on the second carrier.
  • the first message reference may be made to the description in Solution 1, which will not be described again here.
  • the terminal device sends the second message according to the second public information on the second carrier and the first information on the first carrier, including: the terminal device completes downlink timing synchronization according to the second public information on the second carrier; Complete the downward decision After time synchronization, the terminal device sends the second message on the second carrier based on the first information.
  • the first information includes information about resource #A.
  • the terminal device determines the resource used to send the second message based on the information about resource #A included in the first information, and then uses the resource to send the second message.
  • the terminal device sends the second message based on part or all of the information in SIB1 transmitted on the second carrier included in the first information.
  • the method 500 further includes: the terminal device detects third public information on the second carrier, where the third public information includes the first public information.
  • the third public information may include all the information in the first public information, that is, the complete first public information; or, if the first information in step 510 includes part of the first public information, then the third public information Public information includes information other than this part of the information.
  • the first public information is SIB1, assuming that the first information includes part of the information in SIB1 on the second carrier, then SIB1 in the third public information may include the remaining information except this part of the information, or may include the SIB1 All information in .
  • the terminal device After receiving the second public information sent by the network device on the second carrier, the terminal device detects the third public information sent by the network device on the second carrier; the terminal device detects the third public information sent by the network device on the second carrier according to the second public information on the second carrier.
  • the first information on the first carrier and the third common information send the second message.
  • the order in which the terminal device detects the third public information on the second carrier and sends the second message on the second carrier may not be specifically limited.
  • the terminal device after the terminal device sends the second message on the second carrier, it can detect the response message of the second message, such as RAR, within a prescribed time domain window.
  • the response message of the second message such as RAR
  • the network device can send the second public information to the terminal device on the second carrier after receiving the first message from the terminal device. In this way, there is no need to frequently transmit the second public information on the second carrier.
  • the signaling overhead of the second public information on the second carrier is reduced, and the energy consumption overhead caused by the frequent transmission of the second public information by the second carrier is reduced.
  • the first public information can also be transmitted on the first carrier, or the third public information transmitted on the second carrier can include part of the information in the first public information, so that the first public information does not need to be transmitted frequently on the second carrier. information, or part of the information in the first public information transmitted on the second carrier, thereby reducing the signaling overhead of the first public information on the second carrier, thereby reducing the energy consumption overhead caused by the frequent transmission of the first public information on the second carrier.
  • the terminal device does not need to send Msg3.
  • the terminal device does not send Msg3.
  • the terminal device After the terminal device completes timing synchronization on the second carrier, it does not send Msg3.
  • the terminal device When the terminal device has service data that needs to be transmitted, it initiates random access on the second carrier. Since the terminal device has completed timing synchronization, the time spent on timing synchronization during random access can be reduced.
  • the method 500 further includes: the terminal device receives a signal on the first carrier, and accordingly, the network device sends the signal on the first carrier.
  • the signal can be used by the terminal device to learn the location of the first carrier, and then the first information can be subsequently received based on the first carrier.
  • this signal may be SSB and/or SIB1, for example. It can be understood that SSB and SIB1 are exemplary descriptions, and the network device may also send other signals on the first carrier, which is not limited.
  • SIB1 on the first carrier and the first information in step 510 may be carried in the same PDSCH.
  • the terminal device can receive the power of the SSB, such as The RSRP determines whether the network device is accessed through the first carrier or the second carrier. For example, if the power of the SSB received by the terminal device on the first carrier is greater than the threshold, the terminal device accesses the network device through the first carrier; if the power of the SSB received by the terminal device on the first carrier is less than the threshold, the terminal device The device accesses the network device through the second carrier.
  • the threshold may be predefined, for example, by a standard; or the threshold may be preconfigured by the network device; or the terminal device receives SIB1 on the first carrier, and the SIB1 includes the threshold.
  • the terminal device can determine whether to use resource #1 or resource #2 to send the first message according to the SSB received on the first carrier. For example, if the power of the SSB received by the terminal device on the first carrier is greater than the threshold, the terminal device uses resource #1 on the first carrier to send the first message to the network device.
  • the resource #1 is used to represent that the terminal device passes the first A carrier accesses the network device; if the power of the SSB received by the terminal device on the first carrier is less than the threshold, the terminal device uses resource #2 on the first carrier to send the first message to the network device, and the resource #2 is used for It means that the terminal device accesses the network device through the second carrier.
  • the terminal device transmits messages with the network device through the second carrier, including: the terminal device receives the first public information and/or the second public information through the second carrier.
  • the first information includes resource information when transmitting the second public information through the second carrier
  • the terminal device learns the information needed to receive the second public information based on the resource information when transmitting the second public information through the second carrier included in the first information.
  • the resource used can then be used to receive the second public information.
  • the first information includes part of the information in the first public information, and the terminal device receives the remaining part of the information in the first public information on the second carrier.
  • SIB1 and SSB are transmitted on the second carrier, assuming that the first public information is SIB1 and the second public information is SSB.
  • SSB and SIB1 on the second carrier include the following situations.
  • the network device sends SSB and SIB1 on the second carrier.
  • the network device can send SSB and SIB1 periodically, and the period of SSB and SIB1 can be greater than 20ms, for example, the period can be 80ms or 160ms. In this way, the periods of SSB and SIB1 are longer, which can effectively reduce the signaling overhead caused by the network device sending SSB and SIB1 on the second carrier.
  • the solutions of the embodiments of the present application such as solution 1 or solution 2 mentioned above, although the periods of SSB and SIB1 are longer, due to the assistance of the first carrier, it will not increase the cost of the terminal device accessing the network device. delay.
  • the network device sends SSB on the second carrier.
  • the network device can send SSB periodically, and the period of SSB can be greater than 20ms, for example, the period can be 80ms or 160ms. In this way, the period of SSB is longer, and SIB1 does not need to be transmitted periodically on the second carrier, thereby effectively reducing the signaling overhead on the second carrier.
  • the first information transmitted on the first carrier includes the second carrier Part or all of the information in SIB1 transmitted on the Internet not only allows the terminal device to perform initial access, but also does not increase the delay caused by the terminal device accessing the network device.
  • the network device does not need to periodically send SIB1 on the second carrier, but the embodiment of the present application does not limit the network device to not send SIB1 on the second carrier.
  • the network device can send the second information on the second carrier, and the second information can include SIB1.
  • the network device does not periodically send SSB and SIB1 on the second carrier.
  • the network device does not need to periodically send SSB and SIB1 on the second carrier, but the embodiment of the present application does not limit the network device to not send SSB and SIB1 on the second carrier.
  • the network device can send SSB and SIB1 on the second carrier.
  • the signaling overhead on the second carrier can be effectively reduced.
  • the first information transmitted on the first carrier includes part of the SIB1 transmitted on the second carrier or All information, and for example, SSB can be transmitted on the first carrier, so that the terminal device can directly obtain the public information of the network device accessed through the second carrier, reducing the process of the terminal device detecting public information on the second carrier, and not only not affecting the terminal
  • the performance and experience of the device accessing the network device through the second carrier can also be reduced, and the delay of the terminal device accessing the network device through the second carrier can also be reduced.
  • FIG. 6 is a schematic diagram of an information transmission method 600 provided by an embodiment of the present application.
  • Method 600 may include the following steps.
  • the terminal device sends indication information to the network device through the first carrier.
  • the indication information is used to indicate to the network device whether the terminal device accesses the network device through the second carrier.
  • the network device receives the indication information through the first carrier.
  • the resource of the indication information can indicate to the network device whether the terminal device accesses the network device through the second carrier. That is, the indication information implicitly instructs the terminal device to access the network device through the second carrier. For example, if the terminal device uses resource #1 on the first carrier to send indication information to the network device, it means that the terminal device will access the network device through the first carrier; if the terminal device uses resource #2 on the first carrier to If the network device sends the indication information, it means that the terminal device will access the network device through the second carrier.
  • the network device learns that the terminal device will access through the first carrier; if the network device receives the indication information through resource #2, the network device learns that the terminal device will access through the third carrier. Second carrier access.
  • the indication information includes information indicating whether the terminal device accesses the network device through the second carrier, that is, the information displayed in the indication information indicates that the terminal device accesses the network device through the second carrier.
  • the indication information includes an indication field, which indicates whether the terminal device accesses the network device through the second carrier.
  • the indication field may be implemented by one or more bits. For example, 1 bit is used to indicate whether the terminal device accesses the network device through the second carrier. For example, if this bit is set to "1", it means that the terminal device will access the network device through the second carrier; if this bit is set to "0", it means that the terminal device will access the network device through the first carrier.
  • different status values of one or more bits of the indication field are used to indicate that the network device accesses the network device through or not through the second carrier. Still taking 1 bit as an example, if the bit is set to "1", It means that the terminal device will access the network device through the second carrier. If this bit is set to "0", it means that the terminal device will not access the network device through the second carrier, or it means that the terminal device will access the network device through the first carrier. .
  • the sequence of indication information can indicate to the network device whether the terminal device accesses the network device through the second carrier. That is, when the sequences of the indication information are different, the different sequences can respectively indicate whether the terminal device passes or does not pass the second carrier. Access network equipment. For example, if the sequence of the indication information sent by the terminal device to the network device is the first sequence, it means that the terminal device will access the network device through the first carrier; if the sequence of the indication information sent by the terminal device to the network device is the second sequence, it means that the terminal device will access the network device through the first carrier. sequence, it means that the terminal device will access the network device through the second carrier.
  • the network device learns that the terminal device will access through the first carrier; if the network device If the sequence of the indication information received by the device is the second sequence, the network device learns that the terminal device will access through the second carrier.
  • step 610 the indication information is used to indicate to the network device that the terminal device accesses through the second carrier, then the method 600 further includes step 620.
  • the terminal device transmits the message with the network device through the second carrier.
  • the terminal device sends a message to the network device on the second carrier; for another example, the terminal device receives a message from the network device on the second carrier.
  • the network device learns that the terminal device accesses through the second carrier according to the instruction information. Therefore, the network device can respond to the instruction information by sending a message to the terminal device through the second carrier, or receiving messages from the terminal through the second carrier. Device messages.
  • the terminal device transmits messages with the network device through the second carrier. It can also be understood that the terminal device accesses the network device through the second carrier, and the terminal device transmits messages with the network device through the second carrier in order to access the network device. Regarding the solution for the terminal device to access the network device through the second carrier, reference may be made to solution 1 or solution 2 in method 500, which will not be described again here.
  • the network device after the network device receives a trigger from the terminal device, it learns based on the trigger from the terminal device that the terminal device will access the network device through the second carrier, and then transmits information on the second carrier, which can reduce the risk of the second carrier.
  • the signaling overhead caused by transmitting the above information on the second carrier reduces the energy consumption overhead caused by the periodic transmission of the above information on the second carrier.
  • the method 600 further includes: the terminal device receives a synchronization signal from the network device through the first carrier.
  • the terminal device can perform timing synchronization based on the synchronization signal, and thus can correctly receive the indication information in step 610.
  • the method 600 further includes: the terminal device receives the first information from the network device through the first carrier.
  • the terminal device receives the first information from the network device through the first carrier.
  • the first information reference may be made to the relevant description in method 500, which will not be described again here.
  • the above combines solutions 500 and 600 to introduce relevant solutions that can reduce the signaling overhead on the second carrier through assistance between carriers, such as some information required by network equipment when connecting terminal equipment to network equipment through the second carrier. , that is, the first information is sent to the terminal device through the first carrier, and the terminal device notifies the terminal device on the first carrier that it will access the network device through the second carrier.
  • the following introduces relevant plans for TA.
  • the TA-related solutions described below can be used in combination with method 500 or 600, or can be used alone without limitation.
  • the network device may send a synchronization signal on both the first carrier and the second carrier, and accordingly, the terminal device may receive the synchronization signal on both the first carrier and the second carrier. Since the synchronization signals are transmitted on different carriers and the transmission time may be different, the reference points for timing synchronization of the terminal equipment based on the synchronization signals received twice are also different, which will lead to TA mismatch. To facilitate understanding, an exemplary description is provided below in conjunction with Figure 7 .
  • Figure 7 is a schematic diagram of TA mismatch.
  • the gNB can send a first synchronization signal on the first carrier.
  • the UE receives the first synchronization signal on the first carrier.
  • the UE can perform timing synchronization based on the first synchronization signal, as shown in the determination diagram. Reference point B in 7.
  • the gNB can also send a second synchronization signal on the second carrier.
  • the UE receives the second synchronization signal on the second carrier.
  • the UE can perform timing synchronization based on the second synchronization signal, such as determining the reference point in Figure 7 C.
  • the gNB also indicates TAl to the UE, which is used for UE uplink timing synchronization.
  • gNB sends RAR to UE, and the RAR includes TA1.
  • the terminal equipment uses the first synchronization signal on the first carrier and the second synchronization signal on the second carrier to The signals are timing synchronized respectively, and two different reference points are determined, which are point B and point C in Figure 7. Therefore, the terminal equipment needs to determine which reference point to adjust TA1 to achieve timing synchronization. Two possible solutions are introduced below.
  • Solution A the terminal device performs uplink synchronization based on the synchronization signal received on the first carrier, and performs downlink synchronization based on the synchronization signal received on the second carrier.
  • the terminal device receives the first synchronization signal from the network device through the first carrier; the terminal device receives the second synchronization signal from the network device through the second carrier; the terminal device performs uplink synchronization according to the first synchronization signal, and performs uplink synchronization according to the second synchronization signal.
  • the signal is synchronized downlink.
  • the UE performs uplink synchronization based on reference point B, that is, the reference point determined based on the first synchronization signal received on the first carrier, and the UE uses reference point C, that is, based on the reference point received on the second carrier.
  • the reference point determined by the second synchronization signal is used as the reference for downlink synchronization.
  • Figure 8 is a schematic diagram of timing synchronization applicable to the embodiment of the present application.
  • gNB sends the first synchronization signal on the first carrier, and accordingly, the UE receives the first synchronization signal on the first carrier; gNB sends the second synchronization signal on the second carrier, and accordingly, the UE After receiving the second synchronization signal on the second carrier, based on solution A, the UE performs uplink synchronization based on the first synchronization signal, such as determining reference point B; the UE performs downlink synchronization based on the second synchronization signal, such as determining reference point C.
  • the terminal device After the terminal device performs uplink synchronization with reference point B, it sends an uplink signal on the second carrier based on the timing advance TA1; accordingly, the gNB can receive the uplink signal based on reference point A. After the terminal equipment performs uplink synchronization with reference point B, it can be ensured that the uplink signals transmitted by different terminal equipment arrive at the gNB at the same time point, which is reference point A. In addition, when the terminal device receives a downlink signal from the network device, it may receive the downlink signal based on the reference point C determined based on the second synchronization signal.
  • the time reference points at which the terminal equipment receives the downlink signal and the uplink signal may be different.
  • Solution B the terminal equipment performs uplink synchronization and downlink synchronization according to the synchronization signal received on the second carrier.
  • the terminal device performs downlink synchronization according to the second synchronization signal, and the terminal device performs uplink synchronization according to the second synchronization signal and the offset.
  • the offset is used to represent the offset between the first synchronization signal and the second synchronization signal received by the terminal device. It can be understood that the offset may be an offset between the terminal device receiving the first synchronization signal and the second synchronization signal, or it may be other parameters that may indicate that the terminal device receives the first synchronization signal and the second synchronization signal. offset between signals. Taking Figure 7 as an example, the offset can be used to characterize the difference between reference point B and reference point C.
  • the first possible way is that the terminal device receives the offset, so that uplink synchronization can be performed based on the second synchronization signal and the offset.
  • the offset can be carried in a third message, and the third message is used for the terminal device to access the network device through the second carrier.
  • the offset can be used when the terminal device accesses the network device through the second carrier. obtained during the network equipment process.
  • the third message is Msg2 or Msg4, that is, the offset is carried in Msg2 or Msg4. If the offset is carried in Msg2, during the random access process, the network device can indicate TA1 and offset in Msg2, and the terminal device completes uplink synchronization based on the TA1 and offset.
  • the network device can indicate TA1 in Msg2 and the offset in Msg4, and the terminal device adjusts it twice, that is, according to TA1 in Msg2 and Msg4 offset in to complete upstream synchronization.
  • the third message is any of the following: the response message of the first message, the second information, or Msg4, that is, the offset can be carried in any of the following: The response message of the first message, The second message, or Msg4.
  • the third message is any of the following: second public information, a response message to the second message, third public information, or Msg4, that is, the offset can be carried In any of the following: the second public information, the response message of the second message, the third public information, or Msg4.
  • the second possible way is that the terminal device calculates the offset, so that uplink synchronization can be performed based on the second synchronization signal and the offset.
  • the terminal device after the terminal device receives TA1 indicated by the network device, it can calculate the difference between reference point B and reference point C to obtain the offset, and then perform TA1 calculation based on the offset. Adjustment. It can be understood that the size of the timing advance TA when the terminal device sends an uplink signal is: (TA1+T1). Among them, T1 is the offset, which represents the difference between reference point C and reference point B. It can be understood that if the reference point C is located behind the reference point B, such as the reference point C is located behind the reference point B in Figure 7, then T1 is greater than 0; if the reference point C is located before the reference point B, then T1 is less than 0.
  • the terminal device may notify the network device of the offset.
  • the network device no longer needs to calculate the offset, reducing the complexity of the network device.
  • the offset can be carried in Msg3.
  • transmission includes receiving and/or sending.
  • transmitting a signal may include receiving a signal and/or transmitting a signal.
  • detecting may mean “monitoring.”
  • detecting signals may include listening signals.
  • terminal device accesses the network device is mentioned multiple times. Without special explanation, “terminal device accesses the network device” may mean that the terminal device performs initial access. Either the terminal device performs random access, or the terminal device performs operations related to initial access. Among them, execute can also be replaced by proceed. "Terminal equipment accessing network equipment” does not limit the terminal equipment to be able to successfully access network equipment. In actual communication, by performing operations related to initial access, the terminal device may successfully access the network device or may fail to access, which is not limited by the embodiments of the present application.
  • the first common information can be replaced by SIB1
  • the second common information can be replaced by the synchronization signal SSB
  • the second common information can be replaced by the reference signal
  • the methods and operations implemented by the device can also be implemented by components of the device (such as chips or circuits).
  • embodiments of the present application also provide corresponding devices, and the devices include modules for executing corresponding modules in each of the above method embodiments.
  • the module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above method embodiments are also applicable to the following Device Examples.
  • the device may be one of the terminals 120a-120j as shown in Figure 1, or it may be the base station 110a or 110b as shown in Figure 1, or it may be a module applied to the terminal or the base station. (such as chips).
  • FIG. 9 is a schematic diagram of a communication device 900 provided by an embodiment of the present application.
  • the device 900 includes a transceiver unit 910, which may be used to implement corresponding communication functions.
  • the transceiver unit 910 may also be called a communication interface or a communication unit.
  • the device 900 may also include a processing unit 920, which may be used for data processing.
  • a processing unit 920 which may be used for data processing.
  • the device 900 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 920 can read the instructions and/or data in the storage unit, so that the device implements each of the foregoing method embodiments. Actions performed by terminal equipment or network equipment.
  • the device 900 can be used to perform the actions performed by the terminal device in each of the above method embodiments.
  • the device 900 can be used to perform the actions performed by the terminal device in the embodiment of Figure 5 or 6 above.
  • the device 900 can be a component of the terminal device.
  • the transceiver unit 910 is used to perform the transceiver-related operations on the terminal device side in the above method embodiment.
  • the processing unit 920 is used to perform the above method embodiment on the terminal device side. processing related operations.
  • the transceiver unit 910 is configured to receive the first information from the network device through the first carrier; the transceiver unit 910 is also configured to receive the first information from the network device through the second carrier.
  • Carriers transmit messages to network equipment.
  • transceiver unit 910 and processing unit 920 can be obtained directly by referring to the relevant description in the method embodiment shown in FIG. 5, and will not be described again here.
  • the transceiver unit 910 is used to send indication information to the network device through the first carrier, and the indication information is used to indicate to the network device whether the terminal device passes
  • the second carrier accesses the network device; the transceiver unit 910 is also used to transmit messages with the network device through the second carrier.
  • transceiver unit 910 and processing unit 920 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 6 , and will not be described again here.
  • the device 900 can be used to perform the actions performed by the network device in each of the above method embodiments.
  • the device 900 can be used to perform the actions performed by the network device in the embodiment of Figure 5 or 6 above.
  • the device 900 can be a component of the network device.
  • the transceiver unit 910 is used to perform the transceiver-related operations on the network device side in the above method embodiment.
  • the processing unit 920 is used to perform the above method embodiment on the network device side. processing related operations.
  • the transceiver unit 910 is configured to send the first information to the terminal device through the first carrier; the transceiver unit 910 is also configured to transmit the first information to the terminal device through the second carrier Transmit messages to and from end devices.
  • transceiver unit 910 and processing unit 920 can be obtained directly by referring to the relevant description in the method embodiment shown in FIG. 5, and will not be described again here.
  • the transceiver unit 910 is used to receive indication information from the terminal device through the first carrier, and the indication information is used to indicate to the network device whether the network device The network device is accessed through the second carrier; the transceiver unit 910 is also used to transmit messages with the terminal device through the second carrier.
  • transceiver unit 910 and processing unit 920 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 6 , and will not be described again here.
  • the device 900 here is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, for executing a or Multiple software or firmware programs of processors (eg, shared processors, dedicated processors, or group processors, etc.) and memory, merged logic, and/or other suitable components to support the described functionality.
  • ASIC application specific integrated circuit
  • processors eg, shared processors, dedicated processors, or group processors, etc.
  • memory merged logic, and/or other suitable components to support the described functionality.
  • the apparatus 900 can be specifically a terminal device in the above embodiments, and can be used to execute various processes and/or steps corresponding to the terminal device in the above method embodiments, or , the device 900 may be specifically the network device in the above embodiments, and may be used to execute various processes and/or steps corresponding to the network devices in the above method embodiments. To avoid duplication, they will not be described again here.
  • the device 900 of each of the above solutions has the function of realizing the corresponding steps performed by the terminal device in the above method, or the device 900 of each of the above solutions has the function of realizing the corresponding steps of the network device in the above method.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiving unit. (machine replacement), other units, such as processing units, etc., can be replaced by processors to respectively perform the sending and receiving operations and related processing operations in each method embodiment.
  • transceiver unit 910 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.
  • the device in Figure 9 can be the network element or device in the aforementioned embodiment, or it can be a chip or chip system, such as a system on chip (SoC).
  • the transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. No limitation is made here.
  • FIG. 10 is a schematic diagram of another communication device 1000 provided by an embodiment of the present application.
  • the apparatus 1000 includes a processor 1010, which is coupled to a memory 1020.
  • the memory 1020 is used to store computer programs or instructions and/or data.
  • the processor 1010 is used to execute the computer programs or instructions stored in the memory 1020, or to read the memory 1020.
  • the stored data is used to execute the methods in the above method embodiments.
  • processors 1010 there are one or more processors 1010 .
  • the memory 1020 is integrated with the processor 1010, or is provided separately.
  • the device 1000 further includes an interface circuit 1030.
  • the interface circuit 1030 is used for receiving and/or transmitting signals.
  • the processor 1010 and the interface circuit 1030 are coupled to each other.
  • the processor 1010 is used to control the interface circuit 1030 to receive and/or send signals.
  • the interface circuit 1030 may be a transceiver or an input-output interface.
  • the processor 1010 is used to implement the functions of the above-mentioned processing unit 920, and the interface circuit 1030 is used to implement the functions of the above-mentioned transceiver unit 910.
  • the device 1000 is used to implement the operations performed by the terminal device in each of the above method embodiments.
  • the processor 1010 is used to execute computer programs or instructions stored in the memory 1020 to implement related operations of the terminal device in each of the above method embodiments.
  • the apparatus 1000 is used to implement the operations performed by the network device in each of the above method embodiments.
  • the processor 1010 is used to execute computer programs or instructions stored in the memory 1020 to implement related operations of the network device in each of the above method embodiments.
  • the terminal chip implements the functions of the terminal in the above method embodiment.
  • the terminal chip receives information from other modules in the terminal (such as radio frequency modules or antennas), and the information is sent to the terminal by the base station; or, the terminal chip sends information to other modules in the terminal (such as radio frequency modules or antennas), and the terminal chip sends information to other modules in the terminal (such as radio frequency modules or antennas).
  • the information is sent by the terminal to the base station.
  • the base station module implements the functions of the base station in the above method embodiment.
  • the base station module receives information from other modules in the base station (such as radio frequency modules or antennas), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as radio frequency modules or antennas), and the base station module The information is sent by the base station to the terminal.
  • the base station module here can be the baseband chip of the base station, or it can be a DU or other module.
  • the DU here can be a DU under the open radio access network (O-RAN) architecture.
  • OF-RAN open radio access network
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit (ASIC).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache.
  • RAM includes the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambus RAM, DR RAM).
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • FIG 11 is a schematic diagram of a chip system 1100 provided by an embodiment of the present application.
  • the chip system 1100 (or can also be called a processing system) includes a logic circuit 1110 and an input/output interface 1120.
  • the logic circuit 1110 may be a processing circuit in the chip system 1100 .
  • the logic circuit 1110 can be coupled to the memory unit and call instructions in the memory unit, so that the chip system 1100 can implement the methods and functions of various embodiments of the present application.
  • the input/output interface 1120 can be an input/output circuit in the chip system 1100, which outputs information processed by the chip system 1100, or inputs data or signaling information to be processed into the chip system 1100 for processing.
  • the logic circuit 1110 can discover a message to the network device through the input/output interface 1120, and the message can be generated by the logic circuit 1110; or the input/output interface 1120 can input the first information from the network device to the logic circuit 1110 for processing.
  • the logic circuit 1110 can send first information to the terminal device through the input/output interface 1120, and the first information can be the logic circuit generated by 1110; or the input/output interface 1120 can input messages from the terminal device to the logic circuit 1110 for processing.
  • the chip system 1100 is used to implement the operations performed by the terminal device in each of the above method embodiments.
  • the logic circuit 1110 is used to implement processing-related operations performed by the terminal device in the above method embodiment, such as processing-related operations performed by the terminal device in the embodiment shown in FIG. 5 or FIG. 6;
  • input/output interface 1120 is used to implement the sending and/or receiving related operations performed by the terminal device in the above method embodiment, such as the sending and/or receiving related operations performed by the terminal device in the embodiment shown in Figure 5 or Figure 6 .
  • the chip system 1100 is used to implement the operations performed by the network device in each of the above method embodiments.
  • the logic circuit 1110 is used to implement processing-related operations performed by the network device in the above method embodiment, such as processing-related operations performed by the network device in the embodiment shown in Figure 5 or Figure 6;
  • input/output interface 1120 is used to implement the sending and/or receiving related operations performed by the network device in the above method embodiment, such as the sending and/or receiving related operations performed by the network device in the embodiment shown in FIG. 5 or FIG. 6 .
  • Embodiments of the present application also provide a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by terminal devices or network devices in each of the above method embodiments.
  • the computer program when executed by a computer, the computer can implement the method executed by the terminal device or network device in each embodiment of the above method.
  • Embodiments of the present application also provide a computer program product, which includes instructions.
  • the instructions are executed by a computer, the methods executed by terminal devices or network devices in each of the above method embodiments are implemented.
  • An embodiment of the present application also provides a communication system, which includes the terminal equipment and network equipment in the above embodiments.
  • the system includes the terminal device and the network device in the embodiment shown in Figure 5 or Figure 6 .
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer may be a personal computer, a server, Or network equipment, etc.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSD)).
  • the aforementioned available media include but Not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

Abstract

一种信息传输的方法和通信装置。该方法可以包括：终端设备通过第一载波接收来自网络设备的第一信息，第一信息包括以下至少一项：终端设备通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息时的资源信息，其中，第一公共信息和第二公共信息用于终端设备通过第二载波接入网络设备；终端设备通过第二载波与网络设备传输消息。在本申请中，网络设备可以将终端设备通过第二载波接入网络设备时所需要的一些信息，通过第一载波发送给终端设备，这样可以降低第二载波上传输上述信息带来的信令开销，降低第二载波上频繁传输上述信息带来的能耗开销。

Description

信息传输的方法和通信装置
本申请要求于2022年4月29日提交中国国家知识产权局、申请号为202210467193.6、申请名称为“信息传输的方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及无线通信领域，并且更具体地，涉及一种信息传输的方法和通信装置。
背景技术
随着通信系统的逐步演进，网络设备配置的天线数目越来越多，导致网络设备整体的功率消耗也越来越大如何降低网络设备的能耗，受到了越来越多的关注。降低网络设备的能耗的主要技术手段之一是减少网络设备对信号的传输。
网络设备需要在每个载波上周期性的发送公共信息，用于终端设备在每个载波上识别网络设备，进而终端设备可以在每个载波上接入网络。
然而，在一些载波上，即使网络设备没有数据需要传输，网络设备还是需要周期性的发送一些公共信息，该公共信息可用于终端设备识别网络设备，进而使得终端设备接入网络。如何降低公共信息带来的能耗开销是值得考虑的问题。
发明内容
本申请提供一种信息传输的方法和通信装置，以降低网络设备周期性的发送公共信息带来的能耗开销。
第一方面，提供了一种信息传输的方法，该方法可以由终端设备执行，或者，也可以由终端设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。
该方法可以包括：通过第一载波接收来自网络设备的第一信息，第一信息包括以下至少一项：通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息的资源信息，其中，第一公共信息和第二公共信息用于通过第二载波接入网络设备；通过第二载波与网络设备传输消息。
基于上述技术方案，网络设备可以将终端设备通过第二载波接入网络设备时所需要的一些公共信息，通过第一载波发送给终端设备，这样终端设备可以在有通过第二载波传输信息的需求时，直接接入第二载波，而在没有通过第二载波传输信息的需求时，网络设备无需在第二载波上传输信息，终端设备无需通过第二载波接入网络，网络设备也无需在第二载波上频繁发送公共信息。相比于网络设备始终周期性的在第二载波发送公共信息而言，能够降低网络设备发送公共信息的开销。
结合第一方面，在第一方面的某些实现方式中，第一公共信息为包含主小区的配置信息的系统信息。
结合第一方面，在第一方面的某些实现方式中，第二公共信息为用于小区搜索的信息，或者，第二公共信息为用于下行同步的信息。
结合第一方面，在第一方面的某些实现方式中，第一公共信息用于终端设备和网络设备在第二载波上同步。
结合第一方面，在第一方面的某些实现方式中，第二公共信息用于终端设备随机接入网络设备。
结合第一方面，在第一方面的某些实现方式中，第一信息还包括时间窗，时间窗为检测网络设备通过第二载波发送的信号的有效时间范围。
基于上述技术方案，终端设备可在该时间窗内检测网络设备通过第二载波发送的信号，在该时间窗之外，终端设备无需检测网络设备通过第二载波发送的信号。通过配置时间窗，可以避免终端设备一直检测网络设备通过第二载波发送的信号带来的过长时延，提高终端设备的体验。
结合第一方面，第一信息还包括第二载波的频域位置。
基于上述技术方案，终端设备可以获知第二载波的频域范围，进而可以通过该第二载波与网络设备传输消息。
结合第一方面，在第一方面的某些实现方式中，通过第二载波与网络设备传输消息，包括：通过第二载波接收第一公共信息的部分或者全部，和/或，通过第二载波接收第二公共信息。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第一载波向网络设备发送第一消息，第一消息用于指示通过第二载波接入网络设备，其中，第一消息的时频资源和/或序列是根据第一信息确定的。
结合第一方面，在第一方面的某些实现方式中，第一消息为随机接入过程中的消息1(Msg1)。
基于上述技术方案，终端设备可以通过第一消息通知网络设备需要通过第二载波接入网络，或者说，通过第一消息通知网络设备通过第二载波传输信息的需求。网络设备可以在收到第一消息后，在第二载波上向终端设备发送第二信息，从而避免了网络设备频繁且周期性的在第二载波上发送第二信息，减少网络设备在第二载波上的信令开销和降低网络设备在第二载波上的能量消耗。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第二载波接收来自网络设备的第二信息，第二信息包括以下至少一项信息：第一消息的响应消息、调度第一消息的响应消息的下行控制信息、或调度第二公共信息的下行控制信息。
结合第一方面，在第一方面的某些实现方式中，第一消息的响应消息为随机接入过程中的消息2(Msg2)。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：根据第二信息进行波束训练。
基于上述技术方案，终端设备根据第二信息进行波束训练。
结合第一方面，在第一方面的某些实现方式中，第二信息有多个信息，根据该多个信息完成波束训练。
结合第一方面，在第一方面的某些实现方式中，通过第二载波与网络设备传输消息， 包括：通过第二载波向网络设备发送第二消息，第二消息用于接入网络设备。
结合第一方面，在第一方面的某些实现方式中，第二消息为通过第二载波接入网络设备时的随机接入请求。
结合第一方面，在第一方面的某些实现方式中，第二消息为Msg1。
结合第一方面，在第一方面的某些实现方式中，通过第二载波向网络设备发送第二消息之前，方法还包括：通过第二载波接收来自网络设备的第二公共信息；通过第二载波向网络设备发送第二消息，包括：根据第二公共信息和第一信息，通过第二载波向网络设备发送第二消息。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第二载波接收来自网络设备的第三公共信息；根据第二公共信息和第一信息，通过第二载波向网络设备发送第二消息，包括：根据第二公共信息、第一信息、以及第三公共信息，通过第二载波向网络设备发送第二消息；其中，第三公共信息包括第一公共信息中的全部信息；或者，第一信息包括第一公共信息中的部分信息，第三公共信息包括第一公共信息中的除部分信息以外的信息。
基于上述技术方案，第一公共信息可以在第一载波上传输，这样第二载波上不需要频繁的传输第一公共信息；或者，第一载波上传输第一公共信息中的部分信息，第二载波上传输剩余部分。这样，可以减少第二载波上传输第一公共信息带来的信令开销和能量消耗。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：在通过第二载波向网络设备发送第二消息之后，方法还包括：通过第二载波接收来自网络设备的第二公共信息和/或第二消息的响应消息。
结合第一方面，在第一方面的某些实现方式中，第二消息的响应消息为Msg2，或者第二消息的响应消息为随机接入响应。
结合第一方面，在第一方面的某些实现方式中，通过第二载波与网络设备传输消息，包括：通过第二载波向网络设备发送第三消息，第三消息所使用的时频资源和/或序列是根据第一信息确定的，第三消息用于接入网络设备。
结合第一方面，在第一方面的某些实现方式中，通过第二载波与网络设备传输消息之前，方法还包括：通过第一载波向网络设备发送指示信息，指示信息用于指示是否通过第二载波接入网络设备；通过第二载波与网络设备传输消息，包括：在指示信息用于指示通过第二载波接入网络设备的情况下，通过第二载波与网络设备传输消息。
基于上述技术方案，终端设备可以向网络设备指示是否通过第二载波接入网络设备，在终端设备通过第二载波接入网络设备的情况下，终端设备通过第二载波与网络设备传输消息。
结合第一方面，在第一方面的某些实现方式中，指示信息包括指示是否通过第二载波接入网络设备的信息。
结合第一方面，在第一方面的某些实现方式中，指示信息的资源指示是否通过第二载波接入网络设备。
基于上述技术方案，发送指示信息的资源可向网络设备指示终端设备是否通过第二载波接入网络设备，也即，通过资源隐式指示终端设备是否通过第二载波接入网络设备。
结合第一方面，在第一方面的某些实现方式中，若传输指示信息的资源为第一资源， 则第一资源用于网络设备确定终端设备通过第二载波接入网络设备；若传输指示信息的资源为第二资源，则第二资源用于网络设备确定终端设备通过第一载波接入网络设备。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第一载波接收来自网络设备的第一同步信号；根据第一同步信号进行上行同步。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第二载波接收来自网络设备的第二同步信号；根据第二同步信号进行下行同步；或者，根据第二同步信号和偏移量用于上行同步，其中，偏移量用于表征接收第一同步信号和第二同步信号之间的偏移。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：通过第二载波接收来自网络设备的偏移量。
结合第一方面，在第一方面的某些实现方式中，偏移量承载于第三消息中，第三消息用于接入网络设备。
结合第一方面，在第一方面的某些实现方式中，承载偏移量的第三消息可以为Msg2或Msg4。
第二方面，提供了一种信息传输的方法，该方法可以由网络设备执行，或者，也可以由网络设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。
该方法可以包括：通过第一载波向终端设备发送第一信息，第一信息包括以下至少一项：通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息时的资源信息，其中，第一公共信息和第二公共信息用于通过第二载波接入网络设备；通过第二载波与终端设备传输消息。
结合第二方面，在第二方面的某些实现方式中，第一公共信息为包含主小区的配置信息的系统信息。
结合第二方面，在第二方面的某些实现方式中，第二公共信息为用于小区搜索的信息，或者，第二公共信息为用于下行同步的信息。
结合第二方面，在第二方面的某些实现方式中，第一信息还包括时间窗，其中，时间窗为检测网络设备通过第二载波发送的信号的有效时间范围。
结合第二方面，在第二方面的某些实现方式中，第一信息还包括第二载波的频域位置。
结合第二方面，在第二方面的某些实现方式中，通过第二载波与终端设备传输消息，包括：通过第二载波向终端设备发送第一公共信息的部分或者全部，和/或，通过第二载波向终端设备发送第二公共信息。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：通过第一载波接收来自终端设备的第一消息，第一消息用于指示通过第二载波接入网络设备，其中，第一消息的时频资源和/或序列是根据第一信息确定的。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：通过第二载波向终端设备发送第二信息，第二信息包括以下至少一项信息：第一消息的响应消息、调度第一消息的响应消息的下行控制信息、或调度第二公共信息的下行控制信息。
结合第二方面，在第二方面的某些实现方式中，通过第二载波接收来自终端设备的第二消息，第二消息用于接入网络设备。
结合第二方面，在第二方面的某些实现方式中，在通过第二载波接收来自终端设备的 第二消息之前，该方法还包括：通过第二载波向终端设备发送第二公共信息。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：通过第二载波向终端设备发送第三公共信息；其中，第三公共信息包括第一公共信息中的全部信息；或者，第一信息包括第一公共信息中的部分信息，第三公共信息包括第一公共信息中的除部分信息以外的信息。
结合第二方面，在第二方面的某些实现方式中，在通过第二载波接收来自终端设备的第二消息之后，该方法还包括：通过第二载波接收来自网络设备的第二公共信息和/或第二消息的响应消息。
结合第二方面，在第二方面的某些实现方式中，通过第二载波与终端设备传输消息之前，该方法还包括：通过第二载波接收来自终端设备的指示信息，指示信息用于指示是否通过第二载波接入网络设备；通过第二载波与终端设备传输消息，包括：在指示信息用于指示通过第二载波接入网络设备的情况下，通过第二载波与终端设备传输消息。
结合第二方面，在第二方面的某些实现方式中，指示信息包括指示是否通过第二载波接入网络设备的信息。
结合第二方面，在第二方面的某些实现方式中，指示信息的资源指示是否通过第二载波接入网络设备。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：通过第一载波向终端设备发送第一同步信号；通过第二载波向终端设备发送第二同步信号，第二同步信号用于下行同步；其中，第一同步信号用于上行同步，或者，第二同步信号和偏移量用于上行同步，偏移量用于表征接收第一同步信号和第二同步信号之间的偏移。
结合第二方面，在第二方面的某些实现方式中，通过第二载波向终端设备发送偏移量。
结合第二方面，在第二方面的某些实现方式中，偏移量承载于第三消息中，第三消息用于接入网络设备。
结合第二方面，在第一方面的某些实现方式中，承载偏移量的第三消息可以为Msg2或Msg4。
第二方面及各个可能的设计的有益效果可以参考第一方面相关的描述，在此不予赘述。
第三方面，提供了一种信息传输的方法，该方法可以由终端设备执行，或者，也可以由终端设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。为了便于描述，下面以由终端设备执行为例进行说明。
该方法可以包括：终端设备通过第一载波向网络设备发送指示信息，指示信息用于向网络设备指示终端设备通过第二载波接入网络设备；终端设备通过第二载波接收来自网络设备的消息。
结合第三方面，在第三方面的某些实现方式中，终端设备通过第二载波接收来自网络设备的消息，可以替换为，终端设备通过第二载波与网络设备传输消息。具体的实现方式，可以参考第一方面中的描述，此处不再赘述。
基于上述技术方案，终端设备可以向网络设备发送指示消息，网络设备在收到终端设备的指示后，在第二载波上向终端设备发送消息。这样，在第二载波上不需要频繁的传输消息，减少第二载波上的信令开销，降低第二载波频繁传输消息带来的能耗开销。
结合第三方面，在第三方面的某些实现方式中，在终端设备通过第一载波向网络设备 发送指示信息之前，方法还包括：终端设备通过第一载波接收来自网络设备的同步信号。
结合第三方面，在第三方面的某些实现方式中，指示信息包括指示终端设备通过第二载波接入网络设备的信息。
结合第三方面，在第三方面的某些实现方式中，指示信息的资源用于向网络设备指示终端设备通过第二载波接入网络设备。
结合第三方面，在第三方面的某些实现方式中，在终端设备通过第二载波接收来自网络设备的消息之前，方法还包括：终端设备通过第一载波接收来自网络设备的第一信息，第一信息包括以下至少一项：终端设备通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息时的资源信息，其中，第一公共信息和第二公共信息用于终端设备通过第二载波接入网络设备。
关于第一信息的相关内容，可以参考第一方面中的相关描述，此处不再赘述。
第三方面及各个可能的设计的有益效果可以参考第一方面相关的描述，在此不予赘述。
第四方面，提供了一种信息传输的方法，该方法可以由网络设备执行，或者，也可以由网络设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。为了便于描述，下面以由网络设备执行为例进行说明。
该方法可以包括：网络设备通过第一载波接收来自终端设备的指示信息，指示信息用于向网络设备指示终端设备通过第二载波接入网络设备；网络设备通过第二载波与终端设备传输消息。
结合第四方面，在第四方面的某些实现方式中，在网络设备通过第一载波接收来自终端设备的指示信息之前，方法还包括：网络设备通过第一载波向终端设备发送同步信号。
结合第四方面，在第四方面的某些实现方式中，指示信息包括指示终端设备通过第二载波接入网络设备的信息。
结合第四方面，在第四方面的某些实现方式中，指示信息的资源用于向网络设备指示终端设备通过第二载波接入网络设备。
结合第四方面，在第四方面的某些实现方式中，在网络设备通过第二载波与终端设备传输消息之前，方法还包括：网络设备通过第一载波向终端设备发送第一信息，第一信息包括以下至少一项：终端设备通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息时的资源信息，其中，第一公共信息和第二公共信息用于终端设备通过第二载波接入网络设备。
第四方面及各个可能的设计的有益效果可以参考第一方面相关的描述，在此不予赘述。
第五方面，提供了一种信息传输的方法，该方法可以由终端设备执行，或者，也可以由终端设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。为了便于描述，下面以由终端设备执行为例进行说明。
该方法可以包括：终端设备通过第一载波接收来自网络设备的第一同步信号；终端设备通过第二载波接收来自网络设备的第二同步信号；终端设备根据第二同步信号进行下行同步；终端设备根据第一同步信号进行上行同步，或者，终端设备根据第二同步信号和偏移量进行上行同步，其中，偏移量用于表征终端设备接收第一同步信号和第二同步信号之间的偏移。
示例地，关于第一载波和第二载波的相关方案，可以参考前面第一方面至第四方面中 的描述，此处不再赘述。
结合第五方面，在第五方面的某些实现方式中，方法还包括：终端设备通过第二载波接收来自网络设备的偏移量。
结合第五方面，在第五方面的某些实现方式中，偏移量承载于第三消息中，第三消息用于终端设备接入网络设备。
第六方面，提供了一种信息传输的方法，该方法可以由网络设备执行，或者，也可以由网络设备的组成部件(例如芯片或者电路)执行，本申请对此不作限定。为了便于描述，下面以由网络设备执行为例进行说明。
该方法可以包括：网络设备通过第一载波向终端设备发送第一同步信号；网络设备通过第二载波向终端设备发送二同步信号，所述第二同步信号用于下行同步；其中，第一同步信号用于上行同步，或者，第二同步信号和偏移量用于上行同步，偏移量用于表征接收第一同步信号和第二同步信号之间的偏移。
结合第六方面，在第六方面的某些实现方式中，网络设备通过第二载波向终端设备发送偏移量。
关于第一载波和第二载波的相关方案，可以参考前面第一方面至第四方面中的描述，此处不再赘述。
结合第六方面，在第六方面的某些实现方式中，偏移量承载于第三消息中，第三消息用于终端设备接入网络设备。
第七方面，提供一种通信装置，该装置用于执行上述第一方面至第六方面任一种可能实现方式中的方法。具体地，该装置可以包括用于执行第一方面至第六方面任一种可能实现方式中的方法的单元和/或模块，如处理单元和/或通信单元。
在一种实现方式中，该装置为通信设备(如网络设备，又如终端设备)。当该装置为通信设备时，通信单元可以是收发器，或，输入/输出接口；处理单元可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该装置为用于通信设备(如网络设备，又如终端设备)的芯片、芯片系统或电路。当该装置为用于通信设备的芯片、芯片系统或电路时，通信单元可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元可以是至少一个处理器、处理电路或逻辑电路等。
第八方面，提供一种通信装置，该装置包括：至少一个处理器，用于执行存储器存储的计算机程序或指令，以执行上述第一方面至第六方面任一种可能实现方式中的方法。可选地，该装置还包括存储器，用于存储的计算机程序或指令。可选地，该装置还包括通信接口，处理器通过通信接口读取存储器存储的计算机程序或指令。
在一种实现方式中，该装置为通信设备(如网络设备，又如终端设备)。
在另一种实现方式中，该装置为用于通信设备(如网络设备，又如终端设备)的芯片、芯片系统或电路。
第九方面，本申请提供一种处理器，用于执行上述第一方面至第六方面提供的方法。
对于处理器所涉及的发送和获取/接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则可以理解为处理器输出和接收、输入等操作，也可以理解为由射频电路和天线所进行的发送和接收操作，本申请对此不做限定。
第十方面，提供一种计算机可读存储介质，该计算机可读介质存储用于设备执行的程序代码，该程序代码包括用于执行上述第一方面至第六方面任一种可能实现方式中的方法。
第十一方面，提供一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述第一方面至第六方面任一种可能实现方式中的方法。
第十二方面，提供一种通信系统，包括至少一个前述的网络设备和至少一个前述的终端设备。
附图说明
图1是适用于本申请实施例的无线通信系统的一示意图。
图2是适用于本申请实施例的无线通信系统的另一示意图。
图3是SSB在时域和频域上的示意图。
图4是定时提前量(time advance，TA)的示意图。
图5是本申请实施例提供的一种信息传输的方法500的示意图。
图6是本申请实施例提供的一种信息传输的方法600的示意图。
图7是TA不匹配的示意图。
图8是适用于本申请实施例的定时同步的示意图。
图9是本申请实施例提供的一种通信装置900的示意图。
图10是本申请实施例提供的另一种通信装置1000的示意图。
图11是本申请实施例提供的芯片系统1100的示意图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请提供的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)或新无线(new radio，NR)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统等。本申请提供的技术方案还可以应用于未来的通信系统，如第六代(6th generation，6G)移动通信系统。本申请提供的技术方案还可以应用于设备到设备(device to device，D2D)通信，车到万物(vehicle-to-everything，V2X)通信，机器到机器(machine to machine，M2M)通信，机器类型通信(machine type communication，MTC)，以及物联网(internet of things，IoT)通信系统或者其他通信系统。
本申请实施例中的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、通信设备、无线通信设备、用户代理或用户装置。
终端设备可以是一种向用户提供语音/数据的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、混合现实(mix reality，MR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)或智能驾驶中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网 (smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
本申请实施例中，用于实现终端设备的功能的装置可以是终端设备，也可以是能够支持终端设备实现该功能的装置，例如芯片系统或芯片，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备也可以称为接入网设备或无线接入网设备，如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称，或与如下名称进行替换，比如：节点B(NodeB)、演进型基站(evolved NodeB，eNB)、下一代基站(next generation NodeB，gNB)、中继站、接入点、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、主站、辅站、多制式无线(motor slide retainer，MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access point，AP)、传输节点、收发节点、基带单元(baseband unit，BBU)、射频拉远单元(remote radio unit，RRU)、有源天线单元(active antenna unit，AAU)、射频头(remote radio head，RRH)、中心单元(central unit，CU)、分布式单元(distributed unit，DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物，或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及D2D、V2X、M2M通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的，也可以是移动的。例如，直升机或无人机可以被配置成充当移动基站，一个或多个小区可以根据该移动基站的位置移动。在其他示例中，直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中，本申请实施例所提及的网络设备可以为包括CU、或DU、或包括CU和DU的设备、或者控制面CU节点(中央单元控制面(central unit-control plane，CU-CP)) 和用户面CU节点(中央单元用户面(central unit-user plane，CU-UP))以及DU节点的设备。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
首先结合图1和图2简单介绍适用于本申请的网络架构，如下。
图1是适用于本申请实施例的无线通信系统的一示意图。如图1所示，该无线通信系统可以包括无线接入网100。可选地，该无线通信系统还包括核心网200。可选地，该无线通信系统还包括互联网300。其中，无线接入网100可以包括至少一个无线接入网设备(如图1中的110a和110b)，还可以包括至少一个终端(如图1中的120a-120j)。终端通过无线的方式与无线接入网设备相连，无线接入网设备通过无线或有线方式与核心网连接。核心网设备与无线接入网设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。终端和终端之间以及无线接入网设备和无线接入网设备之间可以通过有线或无线的方式相互连接。图1只是示意图，该通信系统中还可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图1中未画出。
无线接入网设备可以是基站(base station)、演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、第五代(5th generation，5G)移动通信系统中的下一代基站(next generation NodeB，gNB)、第六代(6th generation，6G)移动通信系统中的下一代基站、未来移动通信系统中的基站或WiFi系统中的接入节点等；也可以是完成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)，也可以是分布式单元(distributed unit，DU)。这里的CU完成基站的无线资源控制协议和分组数据汇聚层协议(packet data convergence protocol，PDCP)的功能，还可以完成业务数据适配协议(service data adaptation protocol，SDAP)的功能；DU完成基站的无线链路控制层和介质访问控制(medium access control，MAC)层的功能，还可以完成部分物理层或全部物理层的功能，有关上述各个协议层的具体描述，可以参考第三代合作伙伴计划(3rd generation partnership project，3GPP)的相关技术规范。无线接入网设备可以是宏基站(如图1中的110a)，也可以是微基站或室内站(如图1中的110b)，还可以是中继节点或施主节点等。本申请的实施例对无线接入网设备所采用的具体技术和具体设备形态不做限定。为了便于描述，下文以基站作为无线接入网设备的例子进行描述。
终端也可以称为终端设备、用户设备(user equipment，UE)、移动台、移动终端等。终端可以广泛应用于各种场景，例如，设备到设备(device-to-device，D2D)、车物(vehicle to everything，V2X)通信、机器类通信(machine-type communication，MTC)、物联网(internet of things，IOT)、虚拟现实、增强现实、工业控制、自动驾驶、远程医疗、智能电网、智能家具、智能办公、智能穿戴、智能交通、智慧城市等。终端可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、车辆、无人机、直升机、飞机、轮船、机器人、机械臂、智能家居设备等。本申请的实施例对终端所采用的具体技术和具体设备形态不做限定。
基站和终端可以是固定位置的，也可以是可移动的。基站和终端可以部署在陆地上， 包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在飞机、气球和人造卫星上。本申请的实施例对基站和终端的应用场景不做限定。
基站和终端的角色可以是相对的，例如，图1中的直升机或无人机120i可以被配置成移动基站，对于那些通过120i接入到无线接入网100的终端120j来说，终端120i是基站；但对于基站110a来说，120i是终端，即110a与120i之间是通过无线空口协议进行通信的。当然，110a与120i之间也可以是通过基站与基站之间的接口协议进行通信的，此时，相对于110a来说，120i也是基站。因此，基站和终端都可以统一称为通信装置，图1中的110a和110b可以称为具有基站功能的通信装置，图1中的120a-120j可以称为具有终端功能的通信装置。
基站和终端之间、基站和基站之间、终端和终端之间可以通过授权频谱进行通信，也可以通过免授权频谱进行通信，也可以同时通过授权频谱和免授权频谱进行通信；可以通过6千兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请的实施例对无线通信所使用的频谱资源不做限定。
在本申请的实施例中，基站的功能也可以由基站中的模块(如芯片)来执行，也可以由包含有基站功能的控制子系统来执行。这里的包含有基站功能的控制子系统可以是智能电网、工业控制、智能交通、智慧城市等上述应用场景中的控制中心。终端的功能也可以由终端中的模块(如芯片或调制解调器)来执行，也可以由包含有终端功能的装置来执行。
应理解，图1仅为便于理解而示例的简化示意图，该无线通信系统中还可以包括其他网络设备或者还可以包括其他终端设备，图1中未予以画出。本申请实施例可以适用于发送端设备和接收端设备通信的任何通信场景。
图2是适用于本申请实施例的无线通信系统的另一示意图。如图2所示，该无线通信系统可以包括接收端设备和发送端设备。作为示例，接收端设备可以为终端设备，如图1所示的终端设备120；发送端设备可以为网络设备，如图1所示的网络设备110。发送端设备可向接收端设备发送同步信号块(synchronization signal block，SSB)和系统信息块1(system information block 1，SIB1)，相应地，接收端设备接收或检测该SSB和SIB1；若接收端设备接收到SSB和SIB1，则可执行初始接入。可以理解，本申请实施例中提及的终端设备执行初始接入，表示终端设备可以基于收到的信息，如SSB和SIB1，进行与初始接入相关的操作，并不限定终端设备一定可以成功接入网络设备。
应理解，图2仅为便于理解而示例的简化示意图，该无线通信系统中还可以包括更多的步骤，图2中未予以画出。
为便于理解本申请实施例，对本申请中涉及到的术语做简单说明。
可以理解，下文中所介绍的基本概念是以目前协议中规定的基本概念为例进行简单说明，但并不限定本申请实施例只能够应用于目前已有的系统中。因此，以目前已有的系统为例描述时出现的名称，都是功能性描述，具体名称并不限定，仅表示功能，可以对应的扩展到其它系统，比如4G或未来通信系统中。
1、波束
波束可以理解为空域滤波器(spatial domain filter)，或者称空间滤波器(spatial filter)或空间参数(spatial parameter)，或者空域行为。用于发送信号的波束可以称为发送波束 (transmission beam，Tx beam)，可以称为空域发送滤波器(spatial domain transmission filter)或空间发射参数(spatial transmission parameter)，或者发射空域行为；用于接收信号的波束可以称为接收波束(reception beam，Rx beam)，可以称为空域接收滤波器(spatial domain receive filter)或空间接收参数(spatial RX parameter)，或者接收空域行为。
发送波束还可以是指信号经天线发射出去后在空间不同方向上形成的信号强度的分布；类似的，接收波束还可以是指从天线上接收到的无线信号在空间不同方向上的信号强度分布。
此外，波束可以是宽波束，或者窄波束，或者其它类型波束。形成波束的技术可以是波束赋形技术或者其它技术。波束赋形技术具体可以为数字波束赋形技术、模拟波束赋形技术或者混合数字/模拟波束赋形技术等。
2、同步信号块(synchronization signal block，SSB)
SSB可包括2个部分，分别是同步信号(synchronization signal，SS)和物理广播信道(physical broadcast channel block，PBCH)。其中，SS可包括主同步信号(primary synchronization signal，PSS)和辅同步信号(secondary synchronization signal，SSS)。因此，也可以认为SSB包括3个部分，即SSB包括PSS、SSS、以及PBCH，对此不予限制。图3是SSB在时域和频域上的一种示意图。
图3中，SSB在时域上可占时域连续的4个符号，在频域上可占20个资源块(resource block，RB)，即240个子载波(subcarrier，SC)。
SSB可用于实现以下功能：1)小区同步和获取主信息块(master information block，MIB)；2)网络设备侧波束训练。下面简单介绍。
1)小区同步和获取MIB：SSB中的PSS和SSS可以携带小区物理标识(physical cell identifier，PCI)，终端设备通过检测PSS和SSS获取PCI；此外，SSB中的PBCH中可携带SSB索引(index)，每个SSB index对应一个发送该SSB的位置，通过检测SSB index和检测接收SSB的时刻，可完成小区同步。此外，在SSB中的PBCH中可携带MIB，因此基于SSB也可获取到MIB。
2)网络设备侧波束训练：一个SSB图案(pattern)可包含多个SSB index，不同SSB index对应网络设备的不同发送波束，终端设备可以通过检测SSB，选择质量较好的SSB对应的发送波束，从而完成波束训练。此外，终端设备也可以通过采用多个接收波束去接收同一个SSB，完成终端设备侧接收波束训练，为方便描述，以质量较好的SSB为SSB 1，SSB1对应网络设备的发送波束1为例进一步介绍。该发送波束1的作用主要包括：1)终端设备在SSB 1对应的位置接收网络设备通过发送波束1发送的SIB1或寻呼(paging)，提升SIB1或paging的覆盖；2)终端设备在该SSB 1对应的位置发送物理随机接入信道(physical random access channel，PRACH)，网络设备可以用波束1接收上述PRACH，提高PRACH接收成功概率；3)当终端设备完成初始接入建立无线资源控制(radio resource control，RRC)连接后，网络设备可以基于波束1进行更细粒度的波束训练，降低细波束训练的开销。
终端设备在检测到SSB之前，一般不能确定SSB具体的时频资源位置，换句话说，终端设备需要盲检测SSB。一种实现方式为，预定义用于盲检测SSB的频域间隔，也即同步栅格(synchronization raster)，同步栅格在不同的频段有不同的大小。SSB的频域位 置可由同步栅格定义，终端设备可以以同步栅格为间隔逐个检测SSB，从而获得接入网络需要的信息。
3、系统信息块(system information block，SIB)
系统信元通过系统信息块进行广播，系统信息将同类的系统信元组合在一起。本申请中的系统信息可以是SIB1。SIB1的主要功能是完成对主小区(primary cell，PCell)的配置，便于处于空闲(idle)态的终端设备监听寻呼消息，或者便于终端设备通过随机接入完成上行定时同步，从而进入连接(connected)态。
SIB1一般承载于物理下行数据信道(physical downlink shared channel，PDSCH)，通常，网络设备可通过下行控制信息(downlink control information，DCI)，向终端设备指示承载SIB1的PDSCH的时频位置和传输参数，上述DCI的候选时域位置和频域位置可通过MIB指示。举例来说，MIB包含4比特(bit)的控制资源集0(control resource set zero，CORESET0)和4bit的公共搜索空间0(common search space zero，CSS0)，其中，CORESET0用于指示调度SIB1的DCI所在的候选频域位置，CSS0用于指示调度SIB1的DCI所在的候选时域位置。网络设备可采用与发送SSB相同的波束来发送SSB对应的SIB1，相应地，终端设备接收SIB1时，可采用与接收SSB相同的波束来接收SSB对应的SIB1。其中，SSB对应的SIB1，表示该SSB中的MIB用于指示调度该SIB1的DCI所在的频域位置和时域位置。
一种可能的理解，SIB1可认为是剩余最小系统信息(remaining minimum system information，RMSI)，或者SIB1也可以认为是MIB之后第一个发送的系统消息，或者SIB1也可以认为是包括随机接入信道(random access channel，RACH)的时频资源指示信息的系统消息，或者SIB1也可以认为是根据CORESET0和CSS0确定的物理下行控制信道(physical downlink control channel，PDCCH)所调度的PDSCH中承载的信息。
可以理解，上述关于SIB1和SSB的相关描述，仅是示例性说明，其对本申请实施例的保护范围不造成限定。
还可以理解，在本申请实施例中，RACH和PRACH有时交替使用，在不强调区别的情况下，其表示同样的含义。
4、公共信息
公共信息，也可称为公共信号或者非专用信息，可以理解一个通信设备发送给多个通信设备的信息，以图1所示的通信系统为例，公共信息可以理解为网络设备发给小区中的多个终端设备或者一个终端设备组的信息，或者理解为，网络设备不特定发给小区中的某个终端设备或某个终端设备组的信息，或者理解为，小区内多个终端设备或者一个终端设备组可以共同使用的信息，例如，公共信息可以是系统信息，同步信号等。
5、随机接入(random access，RA)
终端设备可通过SIB1中包含的信息，进行随机接入。
作为示例，下面介绍一种可能的随机接入方式，即四步随机接入。四步随机接入仅是用来表示一种随机接入方式的名称，其具体名称并不对本申请实施例的范围造成限定。四步随机接入表示终端设备和网络设备之间需要进行四步信息交互(Msg1,Msg2,Msg3,Msg4)。四步随机接入过程的基本流程如下。
步骤1，终端设备向网络设备发送随机接入前导(preamble)，也可称为Msg1。举例 来说，终端设备获取随机接入配置信息，该随机接入配置信息包括终端设备发送随机接入前导所使用的时频资源(如记为RACH时频资源)，以及发送随机接入前导所采用的序列，终端设备在该时频资源上向网络设备发送随机接入前导。随机接入前导的目的是通知网络设备存在随机接入请求，从而网络设备可以估计与终端设备之间的传输时延，以校准上行定时(uplink timing)。
作为示例，网络设备可能配置多个RACH时机(occasion)，终端设备选择哪个RACH occasion，发送哪个preamble，采用什么发送波束，可根据SSB index的测量结果确定。一种可能的实现方式，SSB index和{RACH occasion，preamble index}之间具有对应关系，若终端设备确定了SSB，则可确定相应的RACH occasion和preamble index。其中，preamble index表示随机接入的序列索引。
举例来说，终端设备测量网络设备发送的SSB，如测量SSB的信号接收功率(reference signal received power，RSRP)；终端设备可选择RSRP大于预设门限(该预设门限如可以是高层配置的，或者也可以是协议定义的)的SSB index，根据SSB index和{RACH occasion，preamble index}之间的对应关系，确定该SSB index对应的RACH occasion和preamble index set。
步骤2，网络设备向终端设备发送随机接入响应(random access response，RAR)，也可称为Msg2。具体地，网络设备检测到随机接入前导后，向终端设备发送Msg2。
RAR的主要功能包括：1)发送初始上行传输TA，以辅助终端设备完成上行定时同步；2)发送临时小区无线网络临时标识符(temporarycell radio network temporary identifier，TC-RNTI)，在初始化接入完成前代替小区无线网络临时标识符(cell radio network temporary identifier，C-RNTI)供终端设备使用；3)发送上行授权(UL grant)(即上行资源分配)，用于调度一个物理上行共享信道(physical uplink shared channel，PUSCH)传输来承载后续Msg3的发送。
步骤3，终端设备向网络设备发送Msg3。具体地，终端设备接收到Msg2后，首先根据定时提前指令调整上行定时，并根据Msg2，在Msg2分配的上行资源上发送上行消息，也称为Msg3。如果步骤1中多个终端设备选择了相同的随机接入前导，则将导致资源冲突。例如，该多个终端设备中的一个终端设备的随机接入前导被网络设备正确接收，网络设备向终端设备发送Msg2，该多个终端设备都可以接收到该Msg2。该多个终端设备无法通过Msg2确定网络设备接收到了哪个终端设备的随机接入前导。此时，这些终端设备都可能接收到Msg2并分别发送Msg3。因此Msg3包括终端设备的唯一标识，用于解决资源冲突。
步骤4，网络设备向终端设备发送冲突解决。具体地，网络设备接收到终端设备的Msg3，向接入成功的终端设备返回冲突解决消息，也可称为Msg4。网络设备在冲突解决消息中将携带Msg3中的唯一标识以指定接入成功的终端设备，而其他没有接入成功的终端设备将重新发起随机接入。
可以理解，上述关于随机接入的具体流程，是示例性说明，其不对本申请实施例的保护范围造成限定。
6、定时提前
网络设备可以配置终端设备发送或接收信号的时频资源。为了确定信号的发送或接收 时间，终端设备需要借助下行信号进行定时同步，以匹配网络设备的时间边界。通常可以使用下行参考信号来定时同步，用于定时同步的参考信号可以称为定时锚点。下行参考信号可以为SSB、小区参考信号(cell reference signal，CRS)等。
下行的定时锚点也可以用于确定上行传输的定时。当终端设备通过下行定时信号确定了下行子帧的边界后，可以按照同样的时间参考系发送上行信号。为了实现在接收端的上行接收对齐，网络设备可以为每个终端设备配置一个TA，终端设备在下行定时同步的基础上根据TA提前发送上行信号，这样终端设备发送的上行信号到达网络设备的时间和网络设备的上行接收定时可以对齐。
图4是TA的示意图。
如图4所示，对于gNB来说，帧边界在A时刻，因此gNB以A时刻为参考点发送SSB，A时刻也可以理解为发送SSB的起点，UE根据接收到的SSB定时同步后的帧边界为B点，因此UE按照以B时刻为参考点发送RACH，B时刻也可以理解为发送RACH的起点，考虑到路径传输等导致的时延，gNB以C时刻为参考点接收RACH，C时刻也可以理解为基站接收RACH的时刻。不同UE到gNB的距离不同，通过电磁波传输信号的速度基本一致，这样可能会使得gNB接收不同终端设备的RACH时的参考点不同。通过TA可以避免上述情况的发生。举例来说，gNB可以为不同UE配置不同的TA，这样可以实现所有UE发送的数据都在同一时刻(如图4中的A时刻)到达网络设备。
7、载波
本申请中，载波可以理解为一个频域范围，或者带宽区域，或者一种频域单位。频域单位可以理解为用于信息的资源在频域占用的资源的计量单位。
本申请中的第一载波和第二载波，也可以理解为第一频域范围和第二频域范围。为方便描述，以下用以第一载波和第二载波为例进行详细介绍。
第一载波，或者也可称为基础载波。例如，终端设备在空闲态或者非活动(inactive)态下的时候，可以通过第一载波接收网络设备发送的公共信息。此时第一载波也可以理解为公共载波，网络设备始终需要在第一载波上周期性地或者频繁的发送公共信号，用于终端上设备识别网络设备，获取终端设备接入网络所需的载波信息和/或公共信息。
再例如，相比于第二载波，第一载波满足以下至少一项：功耗低、速率慢、带宽小。
第二载波，或者也可称为节能载波，例如，相比于第一载波，第二载波满足以下至少一项：功耗高、速率快、带宽大。例如，若终端设备有通过第二载波传输信息的需求，即终端设备将通过第二载波与网络设备传输信息时，网络设备再在该第二载波上传输信息。再例如，若终端设备有通过第二载波接入的需求，即终端设备将通过第二载波接入网络设备时，网络设备再在该第二载波上发送公共信号，该公共信号可用于终端设备通过该第二载波接入网络设备。
第一载波和第二载波可以是两个网络设备发出的频率相同的载波，如第一载波表示某一基站下的小区1，第二载波为另一基站下的小区2；或者也可以是一个网络设备发出的频率不同的两个载波，如第一载波和第二载波表示同一基站下的两个小区，不予限制。
下面结合终端设备的内部结构，介绍第一载波和第二载波的几种可选的情形。
情形1，终端设备包括第一模块和第二模块。第一模块的功耗小于第二模块的功耗。在该情形下，第一载波可以表示终端设备通过第一模块传输信号所使用的载波，第二载波 可以表示终端设备通过第二模块传输信号所使用的载波。
情形2，终端设备可工作在第一链路上，也可工作上第二链路上。或者说，终端设备可在第一链路上传输信号，也可在第二链路上传输信号。或者说，终端设备和网络设备可通过第一链路通信，也可通过第二链路通信。在该情形下，第一载波可以表示终端设备在第一链路上传输信号所使用的载波，第二载波可以表示终端设备通过在第二链路上传输信号所使用的载波。可以理解，链路表征了终端设备和网络设备间的一种连接关系，是一个逻辑概念，而非一个物理实体。
情形3，终端设备处于不同状态下的功耗或者通信能力可能不同。例如，终端设备可以处于不同的无线资源控制(radio resource control，RRC)态下的功耗或者通信能力不同。以第一状态(state)和第二状态为例，终端设备处于第一状态时的功耗可以小于终端设备处于第二状态时的功耗。第一状态，例如可以为idle态或inactive态；第二状态，例如可以为连接(connected)态。在该情形下，第一载波可以表示终端设备处于第一状态时传输信号所使用的载波，第二载波可以表示终端设备通过处于第二状态时传输信号所使用的载波。
上面从不同角度描述了第一载波和第二载波，可以理解，上述为便于理解做的示例性说明，其不对本申请实施例的保护范围造成限定，本申请实施例对第一载波和第二载波没有严格的限定，任何两个不同的载波，都可以适用于本申请实施例。还可以理解，在本申请实施例中，主要以载波为例详细说明了申请实施例提供的方法，但这不应对本申请构成任何限定，例如，本申请实施例中的载波，也可以替换为以下任一项：子载波、物理资源块(physical resource block，PRB)、资源块组(resource block group，RBG)、子带(subband)、或者带宽部分(bandwidth part，BWP)等。
下文实施例中，在第一载波上传输信号与通过第一载波传输信号，有时交替使用，其表示相同的含义。在第二载波上传输信号与通过第二载波传输信号，有时交替使用，其表示相同的含义。
上面对本申请中涉及到的术语做了简单说明，下文实施例中不再赘述。此外，上文关于术语的说明，仅是为便于理解做的说明，其对本申请实施例的保护范围不造成限定。
基于上述对第一载波和第二载波的介绍，以下介绍当前公共信号的一种传输方式。
网络设备在第一载波上，周期性的发送公共信号，对应的，网络设备在第二载波上，也会周期性的发送公共信号。以公共信号为SSB和SIB1为例，终端设备接入网络设备之前，需要先检测SSB和SIB1。网络设备在第一载波和第二载波上均周期性的发送SSB和SIB1，便于终端设备识别网络设备。
对于SSB，在一个SSB的候选频域位置上，终端设备以20ms为周期检测SSB，当检测时间超过20ms终端设备未检测到SSB，那么终端设备可能会认为网络设备没有在该候选频域位置上发送SSB，因此终端设备可能会调整到别的候选频域位置继续检测SSB。
对于SIB1，SIB1中包括随机接入所需的信息，例如终端设备在随机接入过程中所使用的时频资源。因此，即使终端设备检测到了SSB，如果终端设备没有接收到SIB1，那么终端设备也不能进行随机接入，需要继续等待接收SIB1。如果网络设备发送SIB1的周期过长，那么可能会导致终端设备接入网络设备的时延过长，影响终端设备的体验。因此网络设备发送SIB1的周期较短，带来的功率开销也较大。
综上，为了尽可能地提高终端设备的体验，网络设备需要在每个载波上周期性的发送SSB和SIB1。这样就会产生一个问题，即使终端设备在一些载波上没有传输数据的需求，网络设备也需要在这些载波上发送SSB和SIB1，导致网络设备能耗的提高。
鉴于此，本申请提出一种方法，可以通过载波之间的协助，降低发送公共信息的开销，进而降低网络设备的能耗，且不影响终端设备的体验。
一种方案，网络设备可以将终端设备通过第二载波接入网络设备时所需要的一些公共信息，通过第一载波发送给终端设备，这样可以降低第二载波上传输上公共信息带来的信令开销，降低第二载波上频繁传输上述信息带来的能耗开销。
另一种方案，网络设备在收到终端设备有通过第二载波传输数据的需求的指示信息后后，再在第二载波上传输公共信息，这样可以降低网络设备在第二载波上传输公共信息带来的信令开销，从而降低网络设备整体传输公共信息带来的能耗开销。上面对本申请中涉及到的术语做了简单说明，下文实施例中不再赘述。
可以理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
下文将结合附图详细说明本申请实施例提供的方法。本申请提供的实施例可以应用于上述图1或图2所示的系统中，不作限定。
图5是本申请实施例提供的一种信息传输的方法500的示意图。方法500可以包括如下步骤。
510，终端设备通过第一载波接收来自网络设备的第一信息。相应地，网络设备通过第一载波发送第一信息。
其中，第一信息可包括终端设备通过第二载波接入网络设备时所需要的信息。作为示例，第一信息包括以下至少一项：终端设备通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过第二载波传输第二公共信息时的资源信息。以下分别介绍第一信息可以包括的内容。
终端设备通过第二载波接入网络设备所使用的资源信息：为方便描述，将终端设备通过第二载波接入网络设备所使用的资源简称为资源#A，也即，第一信息包括资源#A的信息。本申请中的资源也可以理解为时频资源。
一种可能的方式中，终端设备通过资源#A发送的信息用于：初始接入、定时同步、或者载波唤醒。例如，资源#A可以为RACH资源，终端设备可在该资源#A上向网络设备发送随机接入前导，该在随机接入前导用于初始接入。若终端设备在第一载波上接收资源#A的信息，这样，终端设备可以直接使用该资源#A执行初始接入，降低了在第二载波上传输该资源#A的信息带来的信令开销。
第一公共信息：用于终端设备通过第二载波接入网络设备，或者第一公共信息可用于终端设备通过第二载波进行小区搜索同步。举例来说，第一公共信息可用于完成对小区的配置，便于处于空闲态的终端设备监听寻呼消息，或者便于处于空闲态的终端设备通过随机接入完成上行定时同步，从而进入连接态。若终端设备在第一载波上接收第一公共信息，该第一公共信息可用于终端设备通过第二载波接入网络设备，这样，终端设备可以直接基于该第一公共信息接入网络，降低了在第二载波上传输该第一公共信息带来的信令开销。
作为示例，该第一公共信息例如可以包括以下至少一项：系统信息、区域标识信息。其中，系统信息，例如可以包括：SIB1和/或MIB。举例来说，终端设备可通过第一载波接收该SIB1中的部分或全部信息。例如，该SIB1中的部分信息包括以下一项或多项：服务小区的公共配置信息、终端设备定时器或计数器的配置信息、通用接入控制(unified access control，UAC)的配置信息。其中，区域标识信息用于表示可以标识区域的信息，即终端设备根据区域标识信息可以获知区域的信息。作为示例，区域标识信息可以包括以下一项或多项：跟踪区标识、RAN区域标识、小区标识。
可选地，网络设备在第一载波上发送第一公共信息，且不在第二载波上发送第一公共信息。例如，第一公共信息为SIB1,终端设备在第一载波上接收该SIB1，若终端设备准备通过第二载波接入网络设备，终端设备基于该在第一载波上接收的SIB1，根据该SIB1包含的信息，通过第二载波接入网络设备。
可选地，网络设备可以在第一载波和第二载波上都发送第一公共信息。此时可选地，网络设备在第二载波上发送公共信息的传输周期可以较大，例如，40ms。例如，第一公共信息为SIB1,终端设备在第一载波上接收该SIB1，若终端设备准备通过第二载波接入网络设备，由于网络设备在第二载波上发送第一公共信号的周期较大，终端设备若在第二载波上盲检测第一公共信息，时延较大。因此，终端设备可以基于该在第一载波上接收的SIB1，根据该SIB1包含的信息，通过第二载波接入网络设备。这样能够降低终端设备检测第一公共信息的时延，提高系统性能。
第二公共信息：可用于终端设备实现以下至少一项功能：下行同步、小区搜索、波束训练等等。
例如，该第二公共信息为SSB。终端设备可通过第一载波接收传输SSB的资源信息，进一步地，终端设备基于该资源信息在第二载波上接收SSB完成下行同步、小区搜索、和/或波束训练。
又例如，该第二公共信息为跟踪参考信号(tracking reference signal，TRS)。终端设备可以通过第一载波接收传输TRS的资源信息。根据该资源信息，终端设备可以在第二载波上接收TRS，并基于TRS完成下行同步、小区搜索和/或波束训练。
可选地，第一载波和第二载波上都可以传输第二公共信息。进一步可选地，第一载波上的第二公共信息是第二载波上准备传输的第二公共信息。以第二公共信息为SSB为例，举例来说，若终端设备准备通过第二载波接入网络设备，则网络设备可以先在第一载波上发送SSB，相应地，终端设备在第一载波上接收该SSB，终端设备通过第二载波接入网络设备时所使用的SSB可以是上述在第一载波上接收到的SSB。通过该方案，当第二载波上传输的第二公共信息的传输周期较大时，终端设备可以通过第一载波接收到原本要在第二载波上传输的第二公共信息，这样就能够降低终端设备接收第二公共信息的等待时延，提高系统性能。
通过第二载波传输第二公共信息时的资源信息：作为示例，通过第二载波传输第二公共信息时的资源信息，可包括终端设备通过第二载波接收第二公共信息所使用的时频资源。若终端设备在第一载波上接收通过第二载波传输第二公共信息时的资源信息，这样，终端设备在第二载波接收该第二公共信息时，可直接使用该资源信息接收该第二公共信息，降低了在第二载波上传输该资源信息带来的信令开销。
上面单独介绍了各个信息，下面再结合介绍一下第一公共信息和第二公共信息。
第一公共信息和第二公共信息可用于终端设备通过第二载波接入网络设备。
例如，第一公共信息和第二公共信息的并集，包括终端设备通过第二载波接入网络设备所使用的公共信息。换句话说，终端设备通过该第一公共信息和第二公共信息可接入网络设备。举例来说，终端设备通过第二公共信息，可获取小区标识，完成下行定时同步；终端设备通过第一公共信息中的部分或全部信息，进行随机接入。例如第二公共信息为同步信号，第一公共信息为终端设备接入网络设备所使用的信息中除同步信号以外的信息。
再例如，第一公共信息和第二公共信息可以有交集，换句话说，第一公共信息和第二公共信息中部分信息相同。
上述关于第一公共信息和第二公共信息的说明为示例性说明，对此不予限制。
一种可能的形式，第一公共信息为SIB1，第二公共信息为SSB。这样，终端设备通过SSB，可获取小区标识，完成下行定时同步，并且获取MIB；终端设备通过MIB可获知调度SIB1的DCI的潜在时频位置；网络设备可以通过DCI调度PDSCH，该PDSCH携带SIB1；相应地，终端设备在潜在时频位置盲检DCI，如果检测到DCI，那么可以在该DCI指定的时频资源上接收PDSCH，从而获取该PDSCH携带的SIB1，终端设备通过SIB1中包含的信息，进行随机接入。
可以理解，上述关于第一信息包括的内容的介绍为示例性说明，本申请实施例不予限制。可选地，第一信息还可包括以下至少一项：第二公共信息、时间窗、第二载波的频域位置。其中，时间窗为终端设备检测网络设备通过第二载波发送的信号的有效时间范围。其中，第二载波的频域位置，表示第二载波的频域范围。
520，终端设备通过第二载波与网络设备传输消息。
步骤520中终端设备通过第二载波与网络设备传输的消息，可以为终端设备通过第二载波接入网络设备时所需要的消息。相应地，终端设备通过第二载波与网络设备传输消息，也可理解为，终端设备通过第二载波接入网络设备。具体来说，终端设备可根据第一信息以及第二公共信息，通过第二载波接入网络设备。
基于本申请实施例，网络设备可以将终端设备通过第二载波接入网络设备时所需要的一些公共信息，通过第一载波发送给终端设备，这样可以降低网络设备在第二载波上传输公共信息带来的信令开销，从而降低网络设备整体传输公共信息带来的能耗开销。
步骤520中，终端设备通过第二载波与网络设备传输消息，也可以理解为，终端设备通过第二载波接入网络设备，或者终端设备通第二载波与网络设备传输消息以便接入网络设备。下面介绍终端设备通过第二载波接入网络设备的几种方案。
方案1，终端设备在第一载波上发送第一消息。
基于该方案1，方法500还包括：终端设备在第一载波上发送第一消息。其中，第一消息用于指示终端设备通过第二载波接入网络设备，或者，第一消息用于触发终端设备通过第二载波接入网络设备，或者，第一消息用于通知网络设备终端设备需要通过第二载波接入网络。作为示例，第一消息为随机接入过程中的Msg1或者preamble。
可选地，第一消息是根据第一信息确定的。
情形1，第一消息的时频资源和/或序列是根据第一信息确定的。例如，第一信息中包括资源#A的信息，第一消息为随机接入过程中的Msg1或者preamble，该Msg1所使用的 时频资源可以是根据资源#A确定的。再例如，第一信息中包括第二公共信息，终端设备根据第二公共信息的测量结果选择对应的preamble，并发送preamble。其中，该第二公共信息例如可以为SSB。具体的，可以参考前面术语解释部分的随机接入的相关描述，此处不再赘述。
情形2，第一信息还用于指示在第一载波上传输第一消息。一示例，第一信息包括指示信息，该指示信息用于指示终端设备在第一载波上发送第一消息。其中，该指示信息的形式有很多，不予限制。例如，该指示信息可以为SIB1，具体来说，网络设备在第一载波上发送SIB1，终端设备在第一载波上收到该SIB1后，终端设备确定要在第一载波上发送第一消息。又一示例，预先定义若终端设备通过第一载波接收到第一信息，则终端设备在第一载波上发送第一消息，具体来说，若终端设备通过第一载波接收到来自网络设备的第一信息，则终端设备确定要在第一载波上发送第一消息，此时可以理解为，预定义终端设备在第一载波上接收第一信息，也即在第一载波上发送第一消息，或者理解为，预定义终端设备在第一载波上发送第一消息。
第一消息用于指示终端设备通过第二载波接入网络设备。下面列举第一消息可能的几种形式。
形式1，第一消息的资源可向网络设备指示终端设备通过第二载波接入网络设备，也即，第一消息隐式的指示终端设备通过第二载波接入网络设备。举例来说，第一消息为若终端设备在第一载波上使用资源#1向网络设备发送第一消息，则表示终端设备将通过第一载波接入网络设备；若终端设备在第一载波上使用资源#2向网络设备发送第一消息，则表示终端设备将通过第二载波接入网络设备。相应地，若网络设备通过资源#1收到第一消息，则网络设备获知终端设备将通过第一载波接入；若网络设备通过资源#2收到第一消息，则网络设备获知终端设备将通过第二载波接入。基于方案1中终端设备通过第二载波接入网络设备，方案1中，终端设备在第一载波上发送第一消息，且该第一消息的资源为资源#2，因此，该第一消息用于指示终端设备通过第二载波接入网络设备。
形式2，第一消息包括指示终端设备通过第二载波接入网络设备的信息，也即第一消息显示的指示终端设备通过第二载波接入网络设备的信息。举例来说，第一消息包括指示字段，该指示字段指示终端设备通过第二载波接入网络设备，该指示字段可以通过一个或多个比特来实现。例如，通过1比特来指示终端设备是否通过第二载波接入网络设备。如，若该比特设置为“1”，则表示终端设备将通过第二载波接入网络设备。进一步可选地，该指示字段的一个或多个比特的不同状态值用于指示网络设备通过或者不通过第二载波接入网络设备，仍然以1比特举例，若该比特设置为“1”，则表示终端设备将通过第二载波接入网络设备，若该比特设置为“0”，则表示终端设备将不通过第二载波接入网络设备，或者表示终端设备通过第一载波接入网络设备。
形式3，第一消息的序列可向网络设备指示终端设备通过第二载波接入网络设备，也即第一消息的序列不同时，该不同的序列可以分别指示终端设备通过或者不通过的第二载波接入网络设备。举例来说，若终端设备向网络设备发送的第一消息的序列为第一序列，则表示终端设备将通过第一载波接入网络设备；若终端设备向网络设备发送的第一消息的序列为第二序列，则表示终端设备将通过第二载波接入网络设备。相应地，若网络设备收到的第一消息的序列为第一序列，则网络设备获知终端设备将通过第一载波接入；若网络 设备收到的第一消息的序列为第二序列，则网络设备获知终端设备将通过第二载波接入。方案1中，终端设备在第一载波上发送第一消息，且该第一消息的序列为第二序列，因此，该第一消息用于指示终端设备通过第二载波接入网络设备。
若网络设备基于第一消息获知终端设备将通过第二载波接入，则网络设备可在第二载波上向终端设备发送第二信息。可以理解，第一消息还可理解为用于触发网络设备在第二载波上发送第二信息。
基于方案1，可选地，方法500还包括：终端设备在第二载波上接收来自网络设备的第二信息。
其中，第二信息可用于终端设备进行初始接入，或者执行与初始接入相关的操作。作为示例，第二信息可用于终端设备执行以下至少一项：传输与初始接入相关的消息、上行同步、下行同步、载波唤醒等等。这样，网络设备可以在收到终端设备的触发后，即终端设备向网络设备发送第一消息后，在第二载波上向终端设备发送第二信息，这样可以节省第二信息在第二载波上频繁传输带来的功耗。
一种可能的情况，第二信息可以为PSS和SSS。
另一种可能的情况，第二信息包括以下至少一项：第一公共信息、第一消息的响应消息、调度第一消息的响应消息的下行控制信息、或调度第二公共信息的下行控制信息。进一步地可选地，第二信息包括第二公共信息，此时，该第二信息可以不包括调度第二公共信息的下行控制信息。其中，第二信息中包括的第二公共信息例如可以为同步信号，该同步信号可用于终端设备进行下行同步。作为示例，该第二公共信息可以为SSB。
其中，第一消息的响应消息，或者称应答第一消息的应答信号，例如可以为RAR或者Msg2。关于RAR的功能可参考前面术语解释部分关于随机接入的相关描述，此处不再赘述。
其中，调度第一消息的响应消息的下行控制信息，例如可以为RAR对应的DCI。
其中，第二信息中包括的第一公共信息，可以包括完整的第一公共信息；或者，若步骤510中的第一信息中包括第一公共信息的部分信息，则该第二信息中包括除该部分信息之外的信息。作为示例，第一公共信息为SIB1，假设第一信息中包括第二载波上的SIB1中的部分信息，那么第二信息中的SIB1可以包括除该部分信息以外的剩余信息，也可以包括该SIB1中的全部信息。若第二信息包括第一公共信息，则基于方案1，网络设备基于第一消息获知终端设备将通过第二载波接入，则网络设备可在第二载波上向终端设备发送该第一公共信息，网络设备无需始终在第二载波上周期性的发送第一公共信息，而是基于终端设备的触发后，才在第二载波上发送第一公共信息，可以降低网络设备发送第一公共信息的信令开销，从而降低网络设备的整体功耗。
可选地，第二信息中包括的信息以整体进行发送。以第二信息包括第一消息的响应消息和第二公共信息，第二公共信息为同步信号，第一消息的响应消息为RAR为例，例如，同步信号和RAR可作为一个块(block)进行传输。再例如，同步信号和RAR对应的DCI可作为一个block进行传输。具体可参考现有技术中SS和PBCH联合组成SSB的情况，对此不予限制。作为示例，第二信息中包括的信息以整体进行发送，还可以理解为，第二信息中包括的信息会同时发送或者同时不发送。进一步地，同时发送时，不同的信息可以独立编码，或者也可以联合编码，对此不予限制。
可选地，若第一信息包括时间窗，则终端设备可在该时间窗内检测第二信息。若终端设备在该时间窗内检测到第二信息，则可以直接使用该第二信息；若终端设备在该时间窗内没有检测到第二信息，则可以在第一载波上向网络设备发送第一消息，以触发网络设备发送第二信息。关于该第一消息的触发功能和形式可参考第一消息，此处不再赘述。通过该方式，可以避免终端设备一直等待检测第二信息带来的过长时延，提高终端设备的体验。
可选地，终端设备根据第二信息进行波束训练。例如，第二信息有多个，那么终端设备可以利用该多个第二信息完成波束信息，如可以参考术语解释部分中终端设备通过SSB完成波束训练的方式。再例如，第二信息有1个，那么终端设备可采用和发送第一消息相同的波束接收第二信息，换句话说，终端设备接收第二信息所使用的波束与终端设备发送第一消息所使用的波束相同。
作为示例，以前面术语部分所述的随机接入方式为例，基于方案1，终端设备收到第二信息后，假设第二信息包括RAR，RAR包括承载Msg3的PUSCH的时频资源，终端设备可以根据第二信息在第二载波上发送Msg3。进一步可选地，终端设备在第二载波上接收Msg4。
基于上述方案1，网络设备可以在收到终端设备的触发后，即终端设备向网络设备发送第一消息后，在第二载波上向终端设备发送第二信息。
方案2，终端设备在第二载波上发送第二消息。
基于该方案2，方法500还包括：终端设备在第二载波上发送第二消息。其中，第二消息用于终端设备接入网络设备。进一步，可选地，第二消息为终端设备通过第二载波接入网络设备时的随机接入请求。作为示例，第二消息为随机接入过程中的Msg1或者preamble。
一种可能的实现方式，第二消息所使用的时频资源和/或序列是根据第一信息确定的。例如，第一信息中包括资源#A的信息，第二消息为随机接入过程中的Msg1，该Msg1所使用的时频资源可以是根据资源#A的信息确定的。再例如，第一信息中包括第二公共信息，且该第二公共信息为SSB，第二消息为随机接入过程中的Msg1，终端设备根据SSB的测量结果选择对应的preamble，并发送preamble。
另一种可能的方式，第二消息的时频资源和/或序列通过终端设备在第一载波上检测到的SSB确定。举例来说，在步骤520之前，方法500还包括：终端设备在第一载波上接收网络设备发送的SSB。终端设备可以根据在第一载波上接收到的SSB确定第二消息。
进一步可选地，方法500还包括：终端设备在第二载波上接收来自网络设备的第二公共信息，并且根据该第二公共信息和第一信息在第二载波上发送第二消息。其中，第二公共信息例如为同步信号，该第二公共信息可用于终端设备进行下行同步。作为示例，该第二公共信息可以为SSB或者TRS。
可选地，终端设备在第二载波上接收网络设备发送的第二公共信息之前，方法500还包括：终端设备在第一载波上发送第一消息，相应地，网络设备接收该第一消息。这样，网络设备可以基于第一消息获知终端设备将通过第二载波接入，因此，网络设备可在第二载波上向网络设备发送同步信号。关于第一消息可以参考方案1中的描述，此处不再赘述。
可选地，终端设备根据第二载波上的第二公共信息和第一载波上的第一信息发送第二消息，包括：终端设备根据第二载波上的第二公共信息完成下行定时同步；在完成下行定 时同步后，终端设备基于第一信息在第二载波上发送第二消息。例如，第一信息中包括资源#A的信息，终端设备根据第一信息中包括的资源#A的信息，确定发送第二消息所使用的资源，进而使用该资源发送第二消息。再例如，终端设备根据第一信息中包括的在第二载波上传输的SIB1中的部分或全部信息，发送第二消息。
可选地，方法500还包括：终端设备在第二载波上检测第三公共信息，第三公共信息包括第一公共信息。其中，第三公共信息可以包括第一公共信息中的全部信息，也即完整的第一公共信息；或者，若步骤510中的第一信息中包括第一公共信息的部分信息，则该第三公共信息中包括除该部分信息之外的信息。例如，第一公共信息为SIB1，假设第一信息中包括第二载波上的SIB1中的部分信息，那么第三公共信息中的SIB1可以包括除该部分信息以外的剩余信息，也可以包括该SIB1中的全部信息。
举例来说，终端设备在第二载波上接收网络设备发送的第二公共信息之后，在第二载波上检测网络设备发送的第三公共信息；终端设备根据第二载波上的第二公共信息、第一载波上的第一信息、以及第三公共信息发送第二消息。
需要说明的是，终端设备在第二载波上检测第三公共信息和在第二载波上发送第二消息的先后顺序可以不具体限定。
可选地，终端设备在第二载波上发送第二消息后，可以在规定的时域窗口内检测第二消息的响应消息，如RAR，具体可参考随机接入过程的相关方案，对此不予限制。
基于上述方案2，网络设备可以在收到终端设备的第一消息后，再在第二载波上向终端设备发送第二公共信息，这样第二载波上不需要频繁的传输第二公共信息，从而减少第二载波上第二公共信息的信令开销，降低第二载波频繁传输第二公共信息带来的能耗开销。此外，第一公共信息也可以在第一载波上传输，或者第二载波上传输的第三公共信息可以包括第一公共信息中的部分信息，这样第二载波上不需要频繁的传输第一公共信息，或者第二载波上传输的第一公共信息中的部分信息，从而减少第二载波上第一公共信息的信令开销，进而降低第二载波频繁传输第一公共信息带来的能耗开销。
可以理解，上面所述的2种方案为示例性说明，本申请实施例不限于此，任何属于上述2种方案的变形，都适用于本申请实施例。
还可以理解，在上面所述的2种方案中，终端设备可以不进行Msg3的发送。例如，在上述各种方案中，终端设备在第二载波上完成定时同步后，不进行Msg3的发送，在终端设备有业务数据需要传输时，再在第二载波发起随机接入。由于终端设备已经完成了定时同步，所以可以降低在随机接入过程中进行定时同步所花费的时间。
可选地，方法500还包括：终端设备在第一载波上接收信号，相应地，网络设备在第一载波上发送该信号。其中，该信号可用于终端设备获知第一载波的位置，进而后续可以基于该第一载波接收第一信息。作为示例，该信号例如可以为SSB和/或SIB1。可以理解，SSB和SIB1为示例性说明，网络设备也可以在第一载波上发送其它信号，对此不予限制。
假设上述信号为SIB1，即网络设备在第一载波上发送SIB1，相应地，终端设备在第一载波上接收SIB1。可选地，第一载波上的SIB1和步骤510中的第一信息可承载于同一PDSCH中。
假设上述信号为SSB，即网络设备在第一载波上发送SSB，相应地，终端设备在第一载波上接收SSB。一种可能的实现方式，终端设备可以根据接收该SSB的功率，如该SSB 的RSRP，确定通过第一载波接入网络设备还是通过第二载波接入网络设备。例如，若终端设备在第一载波上接收到的SSB的功率大于阈值，则终端设备通过第一载波接入网络设备；若终端设备在第一载波上接收到的SSB的功率小于阈值，则终端设备通过第二载波接入网络设备。其中，阈值例如可以是预定义的，如标准预定义的；或者阈值也可以是网络设备预配置的；或者终端设备在第一载波上接收SIB1，该SIB1中包括该阈值。
举例来说，假设第一消息的资源为资源#1或资源#2，那么终端设备可以根据第一载波上接收到的SSB确定使用资源#1还是资源#2发送第一消息。例如，若终端设备在第一载波上接收到的SSB的功率大于阈值，则终端设备在第一载波上使用资源#1向网络设备发送第一消息，该资源#1用于表征终端设备通过第一载波接入网络设备；若终端设备在第一载波上接收到的SSB的功率小于阈值，则终端设备在第一载波上使用资源#2向网络设备发送第一消息，该资源#2用于表征终端设备通过第二载波接入网络设备。
可选地，步骤520终端设备通过第二载波与网络设备传输消息，包括：终端设备通过第二载波接收第一公共信息和/或第二公共信息。
例如，第一信息包括通过第二载波传输第二公共信息时的资源信息，终端设备根据第一信息中包括的通过第二载波传输第二公共信息时的资源信息，获知接收第二公共信息所使用的资源，进而可以使用该资源接收第二公共信息。
再例如，第一信息包括第一公共信息中的部分信息，终端设备在第二载波上接收该第一公共信息中的剩余部分信息。
下面以第一公共信息为SIB1，第二公共信息为SSB，介绍第二载波上传输SIB1和SSB的几种可能的情况。
可选地，第二载波上的SSB和SIB1包括以下几种情形。
情形1，网络设备在第二载波上发送SSB和SIB1。
基于该情形，网络设备可以周期性地发送SSB和SIB1，且SSB和SIB1的周期可以大于20ms，如周期可以为80ms或160ms。这样，SSB和SIB1的周期较长，从而可有效的降低网络设备在第二载波上发送SSB和SIB1带来的信令开销。此外，基于本申请实施例的方案，如上文所述的方案1或方案2，虽然SSB和SIB1的周期较长，但是由于第一载波的辅助，不会增加终端设备接入网络设备的带来的时延。
情形2，网络设备在第二载波上发送SSB。
基于该情形，网络设备可以周期性地发送SSB，且SSB的周期可以大于20ms，如周期可以为80ms或160ms。这样，SSB的周期较长，且该第二载波上可以不用周期性地传输SIB1，从而可有效的降低在第二载波上的信令开销。此外，基于本申请实施例的方案，如上文所述的方案1或方案2，虽然SSB的周期较长，但是由于第一载波的辅助，如第一载波上传输的第一信息包括第二载波上传输的SIB1中的部分或全部信息，这样不仅可以使得终端设备可以进行初始接入，而且不会增加终端设备接入网络设备的带来的时延。
可以理解，在情形2中，网络设备可以不需要在第二载波上周期性地发送SIB1，但是本申请实施例并不限定网络设备不能在第二载波上发送SIB1。举例来说，网络设备收到终端设备的触发后，如上述方案1中的第一消息，则网络设备可以在第二载波上发送第二信息，且该第二信息中可以包括SIB1。
情形3，网络设备不在第二载波上周期性地发送SSB和SIB1。
可以理解，在情形3中，网络设备可以不需要在第二载波上周期性地发送SSB和SIB1，但是本申请实施例并不限定网络设备不能在第二载波上发送SSB和SIB1。举例来说，网络设备收到终端设备的触发后，如上述方案1中的第一消息，则网络设备可以在第二载波上发送SSB和SIB1。
基于该情形，可有效的降低在第二载波上的信令开销。此外，基于本申请实施例的方案，如上文所述的方案1或方案2，由于第一载波的辅助，如第一载波上传输的第一信息包括第二载波上传输的SIB1中的部分或全部信息，又如第一载波上可以传输SSB，这样终端设备可以直接获取通过第二载波接入网络设备的公共信息，减少终端设备在第二载波上检测公共信息的过程，不仅不会影响终端设备通过第二载波接入网络设备的性能和体验，而且也可以降低终端设备通过第二载波接入网络设备的时延。
图6是本申请实施例提供的一种信息传输的方法600的示意图。方法600可以包括如下步骤。
610，终端设备通过第一载波向网络设备发送指示信息，指示信息用于向网络设备指示终端设备是否通过第二载波接入网络设备。相应地，网络设备通过第一载波接收该指示信息。
下面列举指示信息可能的几种形式。
形式1，指示信息的资源可向网络设备指示终端设备是否通过第二载波接入网络设备，也即，指示信息隐式的指示终端设备通过第二载波接入网络设备。举例来说，若终端设备在第一载波上使用资源#1向网络设备发送指示信息，则表示终端设备将通过第一载波接入网络设备；若终端设备在第一载波上使用资源#2向网络设备发送指示信息，则表示终端设备将通过第二载波接入网络设备。相应地，若网络设备通过资源#1收到指示信息，则网络设备获知终端设备将通过第一载波接入；若网络设备通过资源#2收到指示信息，则网络设备获知终端设备将通过第二载波接入。
形式2，指示信息包括指示终端设备是否通过第二载波接入网络设备的信息，也即指示信息显示的指示终端设备通过第二载波接入网络设备的信息。举例来说，指示信息包括指示字段，该指示字段指示终端设备是否通过第二载波接入网络设备，该指示字段可以通过一个或多个比特来实现。例如，通过1比特来指示终端设备是否通过第二载波接入网络设备。如，若该比特设置为“1”，则表示终端设备将通过第二载波接入网络设备；若该比特设置为“0”，则表示终端设备将通过第一载波接入网络设备。进一步可选地，该指示字段的一个或多个比特的不同状态值用于指示网络设备通过或者不通过第二载波接入网络设备，仍然以1比特举例，若该比特设置为“1”，则表示终端设备将通过第二载波接入网络设备，若该比特设置为“0”，则表示终端设备将不通过第二载波接入网络设备，或者表示终端设备通过第一载波接入网络设备。
形式3，指示信息的序列可向网络设备指示终端设备是否通过第二载波接入网络设备，也即指示信息的序列不同时，该不同的序列可以分别指示终端设备通过或者不通过的第二载波接入网络设备。举例来说，若终端设备向网络设备发送的指示信息的序列为第一序列，则表示终端设备将通过第一载波接入网络设备；若终端设备向网络设备发送的指示信息的序列为第二序列，则表示终端设备将通过第二载波接入网络设备。相应地，若网络设备收到的指示信息的序列为第一序列，则网络设备获知终端设备将通过第一载波接入；若网络 设备收到的指示信息的序列为第二序列，则网络设备获知终端设备将通过第二载波接入。
可以理解，上述为示例性说明，对此不予限制。
若在步骤610中，指示信息用于向网络设备指示终端设备通过第二载波接入，则方法600还包括步骤620。
620，终端设备通过第二载波与网络设备传输消息。
作为示例，对于终端设备来说，例如，终端设备在第二载波上向网络设备发送消息；再例如，终端设备在第二载波上接收来自网络设备的消息。对于网络设备来说，网络设备根据指示信息获知终端设备通过第二载波接入，因此网络设备可响应于该指示信息，通过第二载波向终端设备发送消息，或者，通过第二载波接收来自终端设备的消息。
步骤620中终端设备通过第二载波与网络设备传输消息，也可以理解为，终端设备通过第二载波接入网络设备，终端设备通第二载波与网络设备传输消息以便接入网络设备。关于终端设备通过第二载波接入网络设备的方案，可以参考方法500中的方案1或方案2，此处不再赘述。
基于本申请实施例，网络设备在收到终端设备的触发后，如基于终端设备的触发获知终端设备将通过第二载波接入网络设备，然后再在第二载波上传输信息，这样可以降低第二载波上传输上述信息带来的信令开销，降低第二载波上周期性传输上述信息带来的能耗开销。
可选地，在步骤610之前，方法600还包括：终端设备通过第一载波接收来自网络设备的同步信号。这样，终端设备可以基于该同步信号进行定时同步，进而可以正确地接收步骤610中的指示信息。
可选地，在步骤620之前，方法600还包括：终端设备通过第一载波接收来自网络设备的第一信息。关于第一信息可以参考方法500中的相关描述，此处不再赘述。
可以理解，方法500中提到的方案都可以用于方法600，此处为简洁，不再赘述。
上文结合方案500和600，介绍了可以通过载波之间的协助降低第二载波上的信令开销的相关方案，如网络设备将终端设备通过第二载波接入网络设备时所需要的一些信息，即第一信息，通过第一载波发送给终端设备，又如终端设备在第一载波上通知终端设备将通过第二载波接入网络设备。下面介绍关于TA的相关方案。下文所述的TA的相关方案，可以与方法500或600结合使用，也可以单独使用，不予限制。
如上所述，在某些情况下，网络设备可能在第一载波和第二载波上都发送同步信号，相应地，终端设备在第一载波上和第二载波上都会接收同步信号。由于同步信号是在不同载波上传输，传输的时间可能不同，那么终端设备基于两次收到的同步信号进行定时同步的参考点也不同，这样就会导致TA不匹配。为便于理解，下面结合图7进行示例性说明。
图7是TA不匹配的示意图。
如图7所示，gNB可以在第一载波上发送第一同步信号，相应地，UE在第一载波上接收该第一同步信号，UE根据该第一同步信号可进行定时同步，如确定图7中的参考点B。gNB还可以在第二载波上发送第二同步信号，相应地，UE在第二载波上接收该第二同步信号，UE根据该第二同步信号可进行定时同步，如确定图7中的参考点C。可选地，gNB还向UE指示TA1，该TA1用于UE上行定时同步。例如，gNB向UE发送RAR，该RAR中包括TA1。终端设备根据第一载波上的第一同步信号和第二载波上的第二同步 信号分别进行了定时同步，且确定了两个不同的参考点，分别是图7中的B点和C点，因此终端设备需要确定以哪个参考点来调整TA1，进而可以实现定时同步。下面介绍两种可能的方案。
方案A，终端设备根据第一载波上接收的同步信号进行上行同步，根据第二载波上接收的同步信号进行下行同步。
例如，终端设备根据通过第一载波接收来自网络设备的第一同步信号；终端设备通过第二载波接收来自网络设备的第二同步信号；终端设备根据第一同步信号进行上行同步，根据第二同步信号进行下行同步。以图7为例，UE以参考点B，即根据在第一载波上接收的第一同步信号确定的参考点，为基准进行上行同步，UE以参考点C，即根据在第二载波上接收的第二同步信号确定的参考点，为基准进行下行同步。
图8是适用于本申请实施例的定时同步的示意图。
如图8所示，gNB在第一载波上发送第一同步信号，相应地，UE在第一载波上接收该第一同步信号；gNB在第二载波上发送第二同步信号，相应地，UE在第二载波上接收该第二同步信号，基于方案A，UE根据该第一同步信号进行上行同步，如确定参考点B；UE根据第二同步信号进行下行同步，如确定参考点C。如图8所示，终端设备以参考点B进行上行同步后，基于定时提前量TA1，在第二载波上发送上行信号；相应地，gNB可以基于参考点A接收该上行信号。终端设备以参考点B进行上行同步后，可以保证不同终端设备传输的上行信号到达gNB的时间点都是一样的，都是参考点A。此外，终端设备接收来自网络设备的下行信号时，可以以基于第二同步信号确定的参考点C为基准，接收下行信号。
基于上述方案A，终端设备接收下行信号和上行信号的时间参考点可以不同。
方案B，终端设备根据第二载波上接收的同步信号进行上行同步和下行同步。
例如，终端设备根据第二同步信号进行下行同步，终端设备根据第二同步信号和偏移量进行上行同步。
其中，偏移量用于表征终端设备接收第一同步信号和第二同步信号之间的偏移。可以理解，该偏移量可以是终端设备接收第一同步信号和第二同步信号之间的偏移，或者也可以是其他参数，该其他参数可指示终端设备接收第一同步信号和第二同步信号之间的偏移。以图7为例，该偏移量可用于表征参考点B和参考点C之间的差值。
第一种可能的方式，终端设备接收该偏移量，从而可以根据第二同步信号和偏移量进行上行同步。
可选地，该偏移量可携带于第三消息中，该第三消息用于终端设备通过第二载波接入网络设备，换句话说，偏移量可以在终端设备通过第二载波接入网络设备的过程中获得。作为示例，第三消息为Msg2或Msg4，也即偏移量携带于Msg2或Msg4中。若偏移量携带于Msg2中，则在随机接入过程中，网络设备可以在Msg2中指示TA1和偏移量，终端设备基于该TA1和偏移量完成上行同步。若偏移量携带于Msg4中，则在随机接入过程中，网络设备可以在Msg2中指示TA1，并且在Msg4中指示偏移量，终端设备根据两次调整，即根据Msg2中的TA1以及Msg4中的偏移量，完成上行同步。
例如，以上述方法500中的方案1为例，第三消息为以下任一项：第一消息的响应消息、第二信息，或者Msg4，也即偏移量可携带于以下任一项中：第一消息的响应消息、 第二信息，或者Msg4。
再例如，以上述方法500中的方案2为例，第三消息为以下任一项：第二公共信息、第二消息的响应消息、第三公共信息、或者Msg4，也即偏移量可携带于以下任一项中：第二公共信息、第二消息的响应消息、第三公共信息、或者Msg4。
第二种可能的方式，终端设备计算偏移量，从而可以根据第二同步信号和偏移量进行上行同步。
以图7所示的示例为例，终端设备接收到网络设备指示的TA1之后，可以计算参考点B和参考点C之间的差值，得到偏移量，进而基于该偏移量对TA1进行调整。可以理解，终端设备发送上行信号时的定时提前量TA的大小为：(TA1+T1)。其中，T1为偏移量，表示参考点C和参考点B之间的差值。可以理解，若参考点C位于参考点B之后，如图7中参考点C位于参考点B之后，则T1大于0；若参考点C位于参考点B之前，则T1小于0。
进一步可选地，终端设备可以向网络设备通知该偏移量。这样，网络设备可以不用再计算偏移量，降低网络设备的复杂度。作为示例，偏移量可携带于Msg3中。
可以理解，在上述一些实施例中，提到了“传输”，在未作出特别说明的情况下，传输，包括接收和/或发送。例如，传输信号，可以包括接收信号和/或发送信号。
还可以理解，在上述一些实施例中，提到了“检测”，在未作出特别说明的情况下，“检测”可以表示“监听”。例如，检测信号，可以包括监听信号。
还可以理解，在本申请中第一、第二仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的信息等。
还可以理解，在上述一些实施例中，多次提及“终端设备接入网络设备”，在未作出特别说明的情况下，“终端设备接入网络设备”可以表示终端设备执行初始接入，或者终端设备执行随机接入，或者终端设备执行与初始接入相关的操作。其中，执行也可以替换为进行。“终端设备接入网络设备”并不限定终端设备一定可以成功接入网络设备。在实际通信中，通过执行与初始接入相关的操作，终端设备可能会成功接入网络设备，也可能会接入失败，对此本申请实施例不予限制。
还可以理解，在上述实施例中，第一公共信息可替换为SIB1，第二公共信息可替换为同步信号SSB，或者第二公共信息可替换为参考信号。
还可以理解，本申请的各实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，也可以在某些场景下，与其他特征进行结合，不作限定。
还可以理解，本申请的各实施例中的方案可以进行合理的组合使用，并且实施例中出现的各个术语的解释或说明可以在各个实施例中互相参考或解释，对此不作限定。
还可以理解，在本申请的各实施例中的各种数字序号的大小并不意味着执行顺序的先后，仅为描述方便进行的区分，不应对本申请实施例的实施过程构成任何限定。
还可以理解，上述各个方法实施例中，由设备实现的方法和操作，也可以由可由设备的组成部件(例如芯片或者电路)来实现。
相应于上述各方法实施例给出的方法，本申请实施例还提供了相应的装置，所述装置包括用于执行上述各个方法实施例相应的模块。该模块可以是软件，也可以是硬件，或者是软件和硬件结合。可以理解的是，上述各方法实施例所描述的技术特征同样适用于以下 装置实施例。在本申请的实施例中，该装置可以是如图1所示的终端120a-120j中的一个，也可以是如图1所示的基站110a或110b，还可以是应用于终端或基站的模块(如芯片)。
图9是本申请实施例提供的一种通信装置900的示意图。该装置900包括收发单元910，收发单元910可以用于实现相应的通信功能。收发单元910还可以称为通信接口或通信单元。
可选地，该装置900还可以包括处理单元920，处理单元920可以用于进行数据处理。
可选地，该装置900还包括存储单元，该存储单元可以用于存储指令和/或数据，处理单元920可以读取存储单元中的指令和/或数据，以使得装置实现前述各个方法实施例中终端设备或网络设备执行的动作。
该装置900可以用于执行上文各个方法实施例中终端设备所执行的动作，如该装置900可以用于执行上文图5或6实施例中终端设备所执行的动作。这时，该装置900可以为终端设备的组成部件，收发单元910用于执行上文方法实施例中终端设备侧的收发相关的操作，处理单元920用于执行上文方法实施例中终端设备侧的处理相关的操作。
当装置900用于实现图5所示的方法实施例中终端设备的功能时：收发单元910，用于通过第一载波接收来自网络设备的第一信息；收发单元910，还用于通过第二载波与网络设备传输消息。
有关上述收发单元910和处理单元920更详细的描述可以直接参考图5所示的方法实施例中相关描述直接得到，这里不加赘述。
当装置900用于实现图6所示的方法实施例中终端设备的功能时：收发单元910，用于通过第一载波向网络设备发送指示信息，指示信息用于向网络设备指示终端设备是否通过第二载波接入网络设备；收发单元910，还用于通过第二载波与网络设备传输消息。
有关上述收发单元910和处理单元920更详细的描述可以直接参考图6所示的方法实施例中相关描述直接得到，这里不加赘述。
该装置900可以用于执行上文各个方法实施例中网络设备所执行的动作，如该装置900可以用于执行上文图5或6实施例中网络设备所执行的动作。这时，该装置900可以为网络设备的组成部件，收发单元910用于执行上文方法实施例中网络设备侧的收发相关的操作，处理单元920用于执行上文方法实施例中网络设备侧的处理相关的操作。
当装置900用于实现图5所示的方法实施例中网络设备的功能时：收发单元910，用于通过第一载波向终端设备发送第一信息；收发单元910，还用于通过第二载波与终端设备传输消息。
有关上述收发单元910和处理单元920更详细的描述可以直接参考图5所示的方法实施例中相关描述直接得到，这里不加赘述。
当装置900用于实现图6所示的方法实施例中网络设备的功能时：收发单元910，用于通过第一载波接收来自终端设备的指示信息，指示信息用于向网络设备指示网络设备是否通过第二载波接入网络设备；收发单元910，还用于通过第二载波与终端设备传输消息。
有关上述收发单元910和处理单元920更详细的描述可以直接参考图6所示的方法实施例中相关描述直接得到，这里不加赘述。
还应理解，这里的装置900以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或 多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置900可以具体为上述实施例中的终端设备，可以用于执行上述各方法实施例中与终端设备对应的各个流程和/或步骤，或者，装置900可以具体为上述实施例中的网络设备，可以用于执行上述各方法实施例中与网络设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
上述各个方案的装置900具有实现上述方法中终端设备所执行的相应步骤的功能，或者，上述各个方案的装置900具有实现上述方法中网络设备所执行的相应步骤的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块；例如收发单元可以由收发机替代(例如，收发单元中的发送单元可以由发送机替代，收发单元中的接收单元可以由接收机替代)，其它单元，如处理单元等可以由处理器替代，分别执行各个方法实施例中的收发操作以及相关的处理操作。
此外，上述收发单元910还可以是收发电路(例如可以包括接收电路和发送电路)，处理单元可以是处理电路。
需要指出的是，图9中的装置可以是前述实施例中的网元或设备，也可以是芯片或者芯片系统，例如：片上系统(system on chip，SoC)。其中，收发单元可以是输入输出电路、通信接口；处理单元为该芯片上集成的处理器或者微处理器或者集成电路。在此不做限定。
图10是本申请实施例提供的另一种通信装置1000的示意图。该装置1000包括处理器1010，处理器1010与存储器1020耦合，存储器1020用于存储计算机程序或指令和/或数据，处理器1010用于执行存储器1020存储的计算机程序或指令，或读取存储器1020存储的数据，以执行上文各方法实施例中的方法。
可选地，处理器1010为一个或多个。
可选地，存储器1020为一个或多个。
可选地，该存储器1020与该处理器1010集成在一起，或者分离设置。
可选地，如图10所示，该装置1000还包括接口电路1030。接口电路1030用于信号的接收和/或发送。处理器1010和接口电路1030之间相互耦合。例如，处理器1010用于控制接口电路1030进行信号的接收和/或发送。可以理解的是，接口电路1030可以为收发器或输入输出接口。
当装置1000用于实现图5或图6所示的方法时，处理器1010用于实现上述处理单元920的功能，接口电路1030用于实现上述收发单元910的功能。
作为一种方案，该装置1000用于实现上文各个方法实施例中由终端设备执行的操作。
例如，处理器1010用于执行存储器1020存储的计算机程序或指令，以实现上文各个方法实施例中终端设备的相关操作。例如，图5或图6所示实施例中的终端设备执行的方法。
作为一种方案，该装置1000用于实现上文各个方法实施例中由网络设备执行的操作。
例如，处理器1010用于执行存储器1020存储的计算机程序或指令，以实现上文各个方法实施例中网络设备的相关操作。例如，图5或图6所示实施例中的网络设备执行的方 法。
当上述通信装置为应用于终端的芯片时，该终端芯片实现上述方法实施例中终端的功能。该终端芯片从终端中的其它模块(如射频模块或天线)接收信息，该信息是基站发送给终端的；或者，该终端芯片向终端中的其它模块(如射频模块或天线)发送信息，该信息是终端发送给基站的。
当上述通信装置为应用于基站的模块时，该基站模块实现上述方法实施例中基站的功能。该基站模块从基站中的其它模块(如射频模块或天线)接收信息，该信息是终端发送给基站的；或者，该基站模块向基站中的其它模块(如射频模块或天线)发送信息，该信息是基站发送给终端的。这里的基站模块可以是基站的基带芯片，也可以是DU或其他模块，这里的DU可以是开放式无线接入网(open radio access network，O-RAN)架构下的DU。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图11是本申请实施例提供的芯片系统1100的示意图。该芯片系统1100(或者也可以称为处理系统)包括逻辑电路1110以及输入/输出接口(input/output interface)1120。
其中，逻辑电路1110可以为芯片系统1100中的处理电路。逻辑电路1110可以耦合连接存储单元，调用存储单元中的指令，使得芯片系统1100可以实现本申请各实施例的方法和功能。输入/输出接口1120，可以为芯片系统1100中的输入输出电路，将芯片系统1100处理好的信息输出，或将待处理的数据或信令信息输入芯片系统1100进行处理。
具体地，例如，若终端设备安装了该芯片系统1100，逻辑电路1110与输入/输出接口 1120耦合，逻辑电路1110可通过输入/输出接口1120向网络设备发现消息，该消息可以为逻辑电路1110根据生成的；或者输入/输出接口1120可将来自网络设备的第一信息输入至逻辑电路1110进行处理。又如，若网络设备安装了该芯片系统1100，逻辑电路1110与输入/输出接口1120耦合，逻辑电路1110可通过输入/输出接口1120向终端设备发送第一信息，该第一信息可以为逻辑电路1110生成的；或者输入/输出接口1120可将来自终端设备的消息输入至逻辑电路1110进行处理。
作为一种方案，该芯片系统1100用于实现上文各个方法实施例中由终端设备执行的操作。
例如，逻辑电路1110用于实现上文方法实施例中由终端设备执行的处理相关的操作，如，图5或图6所示实施例中的终端设备执行的处理相关的操作；输入/输出接口1120用于实现上文方法实施例中由终端设备执行的发送和/或接收相关的操作，如，图5或图6所示实施例中的终端设备执行的发送和/或接收相关的操作。
作为另一种方案，该芯片系统1100用于实现上文各个方法实施例中由网络设备执行的操作。
例如，逻辑电路1110用于实现上文方法实施例中由网络设备执行的处理相关的操作，如，图5或图6所示实施例中的网络设备执行的处理相关的操作；输入/输出接口1120用于实现上文方法实施例中由网络设备执行的发送和/或接收相关的操作，如，图5或图6所示实施例中的网络设备执行的发送和/或接收相关的操作。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述各方法实施例中由终端设备或网络设备执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法各实施例中由终端设备或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品，包含指令，该指令被计算机执行时以实现上述各方法实施例中由终端设备或网络设备执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文各实施例中的终端设备和网络设备。例如，该系统包含图5或图6所示实施例中的终端设备和网络设备。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器， 或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD)等。例如，前述的可用介质包括但不限于：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (52)

  1. 一种信息传输的方法，其特征在于，包括：
    通过第一载波接收来自网络设备的第一信息，所述第一信息包括以下至少一项：通过第二载波接入所述网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过所述第二载波传输第二公共信息的资源信息，其中，所述第一公共信息和所述第二公共信息用于通过所述第二载波接入所述网络设备；
    通过所述第二载波与所述网络设备传输消息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息还包括时间窗或所述第二载波的频域位置中的至少一项，其中，所述时间窗为检测所述网络设备通过所述第二载波发送的信号的有效时间范围。
  3. 根据权利要求1或2所述的方法，其特征在于，所述通过所述第二载波与所述网络设备传输消息，包括：
    通过所述第二载波接收所述第一公共信息的部分或者全部，和/或，通过所述第二载波接收所述第二公共信息。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    通过所述第一载波向所述网络设备发送第一消息，所述第一消息用于指示通过所述第二载波接入所述网络设备，其中，所述第一消息的时频资源和/或序列是根据所述第一信息确定的。
  5. 根据权利要求4所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波接收来自所述网络设备的第二信息，所述第二信息包括以下至少一项信息：所述第一消息的响应消息、调度所述第一消息的响应消息的下行控制信息、或调度所述第二公共信息的下行控制信息。
  6. 根据权利要求1至3中任一项所述的方法，其特征在于，所述通过所述第二载波与所述网络设备传输消息，包括：
    通过所述第二载波向所述网络设备发送第二消息，所述第二消息用于接入所述网络设备。
  7. 根据权利要求6所述的方法，其特征在于，通过所述第二载波向所述网络设备发送第二消息之前，所述方法还包括：
    通过所述第二载波接收来自所述网络设备的所述第二公共信息；
    通过所述第二载波向所述网络设备发送第二消息，包括：
    根据所述第二公共信息和所述第一信息，通过所述第二载波向所述网络设备发送所述第二消息。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波接收来自所述网络设备的第三公共信息；
    根据所述第二公共信息和所述第一信息，通过所述第二载波向所述网络设备发送所述第二消息，包括：
    根据所述第二公共信息、所述第一信息、以及所述第三公共信息，通过所述第二载波 向所述网络设备发送所述第二消息；
    其中，所述第三公共信息包括所述第一公共信息中的全部信息；或者，所述第一信息包括所述第一公共信息中的部分信息，所述第三公共信息包括所述第一公共信息中的除所述部分信息以外的信息。
  9. 根据权利要求6所述的方法，其特征在于，在通过所述第二载波向所述网络设备发送所述第二消息之后，所述方法还包括：
    通过所述第二载波接收来自所述网络设备的所述第二公共信息和/或所述第二消息的响应消息。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述通过所述第二载波与所述网络设备传输消息之前，所述方法还包括：
    通过所述第一载波向所述网络设备发送指示信息，所述指示信息用于指示是否通过所述第二载波接入所述网络设备；
    所述通过所述第二载波与所述网络设备传输消息，包括：
    在所述指示信息用于指示通过所述第二载波接入所述网络设备的情况下，通过所述第二载波与所述网络设备传输消息。
  11. 根据权利要求10所述的方法，其特征在于，所述指示信息包括指示是否通过所述第二载波接入所述网络设备的信息。
  12. 根据权利要求10所述的方法，其特征在于，所述指示信息的资源指示是否通过所述第二载波接入所述网络设备。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述方法还包括：
    通过所述第一载波接收来自所述网络设备的第一同步信号；
    通过所述第二载波接收来自所述网络设备的第二同步信号；
    根据所述第二同步信号进行下行同步；
    根据所述第一同步信号进行上行同步，或者，根据所述第二同步信号和偏移量进行上行同步，其中，所述偏移量用于表征接收所述第一同步信号和所述第二同步信号之间的偏移。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波接收来自所述网络设备的所述偏移量。
  15. 根据权利要求14所述的方法，其特征在于，所述偏移量承载于第三消息中，所述第三消息用于接入所述网络设备。
  16. 一种信息传输的方法，其特征在于，包括：
    通过第一载波向终端设备发送第一信息，所述第一信息包括以下至少一项：通过第二载波接入网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过所述第二载波传输第二公共信息时的资源信息，其中，所述第一公共信息和所述第二公共信息用于通过所述第二载波接入所述网络设备；
    通过所述第二载波与所述终端设备传输消息。
  17. 根据权利要求16所述的方法，其特征在于，所述第一信息还包括时间窗或所述第二载波的频域位置中的至少一项，其中，所述时间窗为检测所述网络设备通过所述第二载波发送的信号的有效时间范围。
  18. 根据权利要求16或17所述的方法，其特征在于，所述通过所述第二载波与所述终端设备传输消息，包括：
    通过所述第二载波向所述终端设备发送所述第一公共信息的部分或者全部，和/或，通过所述第二载波向所述终端设备发送所述第二公共信息。
  19. 根据权利要求16至18中任一项所述的方法，其特征在于，所述方法还包括：
    通过所述第一载波接收来自所述终端设备的第一消息，所述第一消息用于指示通过所述第二载波接入所述网络设备，其中，所述第一消息的时频资源和/或序列是根据所述第一信息确定的。
  20. 根据权利要求19所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波向所述终端设备发送第二信息，所述第二信息包括以下至少一项信息：所述第一消息的响应消息、调度所述第一消息的响应消息的下行控制信息、或调度所述第二公共信息的下行控制信息。
  21. 根据权利要求16至18中任一项所述的方法，其特征在于，所述通过所述第二载波与所述终端设备传输消息，包括：
    通过所述第二载波接收来自所述终端设备的第二消息，所述第二消息用于接入所述网络设备。
  22. 根据权利要求21所述的方法，其特征在于，在通过所述第二载波接收来自所述终端设备的第二消息之前，所述方法还包括：
    通过所述第二载波向所述终端设备发送所述第二公共信息。
  23. 根据权利要求22所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波向所述终端设备发送第三公共信息；
    其中，所述第三公共信息包括所述第一公共信息中的全部信息；或者，所述第一信息包括所述第一公共信息中的部分信息，所述第三公共信息包括所述第一公共信息中的除所述部分信息以外的信息。
  24. 根据权利要求21所述的方法，其特征在于，在通过所述第二载波接收来自所述终端设备的第二消息之后，所述方法还包括：
    通过所述第二载波向所述终端设备发送所述第二公共信息和/或所述第二消息的响应消息。
  25. 根据权利要求16至24中任一项所述的方法，其特征在于，所述通过所述第二载波与所述终端设备传输消息之前，所述方法还包括：
    通过所述第二载波接收来自所述终端设备的指示信息，所述指示信息用于指示是否通过所述第二载波接入所述网络设备；
    所述通过所述第二载波与所述终端设备传输消息，包括：
    在所述指示信息指示通过所述第二载波接入所述网络设备的情况下，通过所述第二载波与所述终端设备传输消息。
  26. 根据权利要求25所述的方法，其特征在于，所述指示信息包括指示是否通过所述第二载波接入所述网络设备的信息。
  27. 根据权利要求25所述的方法，其特征在于，所述指示信息的资源指示是否通过所述第二载波接入所述网络设备。
  28. 根据权利要求16至27中任一项所述的方法，其特征在于，所述方法还包括：
    通过所述第一载波向所述终端设备发送第一同步信号；
    通过所述第二载波向所述终端设备发送第二同步信号，所述第二同步信号用于下行同步；
    其中，所述第一同步信号用于上行同步，或者，所述第二同步信号和偏移量用于上行同步，所述偏移量用于表征接收所述第一同步信号和所述第二同步信号之间的偏移。
  29. 根据权利要求28所述的方法，其特征在于，所述方法还包括：
    通过所述第二载波向所述终端设备发送所述偏移量。
  30. 根据权利要求29所述的方法，其特征在于，所述偏移量承载于第三消息中，所述第三消息用于接入所述网络设备。
  31. 一种信息传输的方法，其特征在于，包括：
    网络设备通过第一载波向终端设备发送第一信息，所述第一信息包括以下至少一项：通过第二载波接入所述网络设备所使用的资源信息、第一公共信息中的部分或全部信息、通过所述第二载波传输第二公共信息时的资源信息，其中，所述第一公共信息和所述第二公共信息用于通过所述第二载波接入所述网络设备；
    所述终端设备通过第一载波接收所述第一信息；
    所述网络设备和所述终端设备之间通过所述第二载波传输消息。
  32. 根据权利要求31所述的方法，其特征在于，所述第一信息还包括时间窗或所述第二载波的频域位置中的至少一项，其中，所述时间窗为检测所述网络设备通过所述第二载波发送的信号的有效时间范围。
  33. 根据权利要求31或32所述的方法，其特征在于，所述网络设备和所述终端设备之间通过所述第二载波传输消息，包括：
    所述网络设备通过所述第二载波向所述终端设备发送所述第一公共信息的部分或者全部，所述终端设备通过所述第二载波接收所述第一公共信息的部分或者全部；和/或，
    所述网络设备通过所述第二载波向所述终端设备发送所述第二公共信息，所述终端设备通过所述第二载波接收所述第二公共信息。
  34. 根据权利要求31至33中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备通过所述第一载波向所述网络设备发送第一消息，所述第一消息用于指示通过所述第二载波接入所述网络设备，其中，所述第一消息的时频资源和/或序列是根据所述第一信息确定的；
    所述网络设备通过所述第一载波接收所述的第一消息。
  35. 根据权利要求34所述的方法，其特征在于，所述方法还包括：
    所述网络设备通过所述第二载波向所述终端设备发送第二信息，所述第二信息包括以下至少一项信息：所述第一消息的响应消息、调度所述第一消息的响应消息的下行控制信息、或调度所述第二公共信息的下行控制信息；
    所述终端设备通过所述第二载波接收所述第二信息。
  36. 根据权利要求31至33中任一项所述的方法，其特征在于，所述网络设备和所述终端设备之间通过所述第二载波传输消息，包括：
    所述终端设备通过所述第二载波向所述网络设备发送第二消息，所述第二消息用于接 入所述网络设备；
    所述网络设备通过所述第二载波接收所述第二消息。
  37. 根据权利要求36所述的方法，其特征在于，在所述终端设备通过所述第二载波向所述网络设备发送第二消息，以及所述网络设备接收所述第二消息之前，所述方法还包括：
    所述网络设备通过所述第二载波向所述终端设备发送所述第二公共信息；
    所述终端设备通过所述第二载波接收所述第二公共信息；
    所述终端设备通过所述第二载波向所述网络设备发送第二消息，包括：
    所述终端设备根据所述第二公共信息和所述第一信息，通过所述第二载波向所述网络设备发送所述第二消息。
  38. 根据权利要求37所述的方法，其特征在于，所述方法还包括：
    所述网络设备通过所述第二载波向所述终端设备发送第三公共信息；
    所述终端设备通过所述第二载波接收所述第三公共信息；
    所述终端设备根据所述第二公共信息和所述第一信息，通过所述第二载波向所述网络设备发送所述第二消息，包括：
    所述终端设备根据所述第二公共信息、所述第一信息、以及所述第三公共信息，通过所述第二载波向所述网络设备发送所述第二消息；
    其中，所述第三公共信息包括所述第一公共信息中的全部信息；或者，所述第一信息包括所述第一公共信息中的部分信息，所述第三公共信息包括所述第一公共信息中的除所述部分信息以外的信息。
  39. 根据权利要求36所述的方法，其特征在于，在所述终端设备通过所述第二载波向所述网络设备发送所述第二消息，以及所述网络设备通过所述第二载波接收所述第二消息之后，所述方法还包括：
    所述网络设备通过所述第二载波向所述终端设备发送所述第二公共信息和/或所述第二消息的响应消息；
    所述终端设备通过所述第二载波接收所述第二公共信息和/或所述第二消息的响应消息。
  40. 根据权利要求31至39中任一项所述的方法，其特征在于，所述网络设备和所述终端设备之间通过所述第二载波传输消息之前，所述方法还包括：
    所述终端设备通过所述第一载波向所述网络设备发送指示信息，所述指示信息用于指示是否通过所述第二载波接入所述网络设备；
    所述网络设备通过所述第二载波接收所述指示信息；
    所述网络设备和所述终端设备之间通过所述第二载波传输消息，包括：
    在所述指示信息指示通过所述第二载波接入所述网络设备的情况下，所述网络设备和所述终端设备之间通过所述第二载波传输消息。
  41. 根据权利要求40所述的方法，其特征在于，所述指示信息包括指示是否通过所述第二载波接入所述网络设备的信息。
  42. 根据权利要求40所述的方法，其特征在于，所述指示信息的资源指示是否通过所述第二载波接入所述网络设备。
  43. 根据权利要求31至42中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备通过所述第一载波向所述终端设备发送第一同步信号；
    所述终端设备通过所述第一载波接收所述第一同步信号；
    所述网络设备通过所述第二载波向所述终端设备发送第二同步信号；
    所述终端设备通过所述第二载波接收所述第二同步信号；
    所述终端设备根据所述第二同步信号进行下行同步；
    所述终端设备根据所述第一同步信号进行上行同步，或者，根据所述第二同步信号和偏移量进行上行同步，其中，所述偏移量用于表征接收所述第一同步信号和所述第二同步信号之间的偏移。
  44. 根据权利要求43所述的方法，其特征在于，所述方法还包括：
    所述网络设备通过所述第二载波向所述终端设备发送所述偏移量；
    所述终端设备通过所述第二载波接收所述偏移量。
  45. 根据权利要求44所述的方法，其特征在于，所述偏移量承载于第三消息中，所述第三消息用于接入所述网络设备。
  46. 一种通信装置，其特征在于，包括：
    处理器和存储器，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述装置执行如权利要求1至15中任一项所述的方法，或者以使得所述装置执行如权利要求16至30中任一项所述的方法。
  47. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至15中任意一项所述的方法，或者以使得所述计算机执行如权利要求16至30中任一项所述的方法。
  48. 一种计算机程序产品，其特征在于，所述计算机程序产品包括用于执行如权利要求1至15中任一项所述的方法的指令，或者，所述计算机程序产品包括用于执行如权利要求16至30中任一项所述的方法的指令。
  49. 一种通信系统，其特征在于，包括终端设备和网络设备，
    其中，所述终端设备用于执行如权利要求1至15中任一项所述的方法，所述网络设备用于执行如权利要求16至30中任一项所述的方法。
  50. 一种通信装置，其特征在于，包括具有实现如权利要求1至15中任一项所述的方法，或者如权利要求16至30中任一项所述的方法的功能的单元。
  51. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求1至15中任一项所述的方法。
  52. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求16至30中任一项所述的方法。
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WO2012172324A1 (en) * 2011-06-14 2012-12-20 Sca Ipla Holdings Inc. Telecommunications method and system
CN103609183A (zh) * 2011-06-14 2014-02-26 Sca艾普拉控股有限公司 远程通信方法和系统
CN113261320A (zh) * 2019-03-08 2021-08-13 华为技术有限公司 通信方法、装置及系统
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WO2012172324A1 (en) * 2011-06-14 2012-12-20 Sca Ipla Holdings Inc. Telecommunications method and system
CN103609183A (zh) * 2011-06-14 2014-02-26 Sca艾普拉控股有限公司 远程通信方法和系统
CN113261320A (zh) * 2019-03-08 2021-08-13 华为技术有限公司 通信方法、装置及系统
CN113923750A (zh) * 2020-07-10 2022-01-11 华为技术有限公司 接入小区的方法和装置

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