Information sending method and apparatus

Abstract

Embodiments of the present application relate to the field of communications, and provide an information sending method and apparatus, which can increase the number of successfully accessed users and improve the communication performance. The method comprises: a first terminal device receives a first synchronization signal / physical broadcast channel block (SSB), and sends a first message on the basis of the first SSB, wherein the first message is used for indicating beam position information of a beam position where the first terminal device is located.

Description

Information sending method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 23, 2023, with application number 202311589357.3 and application name “Information Sending Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a method and apparatus for sending information. Background Art

[0003] Compared to terrestrial communications, non-terrestrial networks (NTNs) offer wide coverage and flexible networking. NTNs utilize uncrewed aerial vehicles (UAVs), high-altitude platforms, satellites, and other devices to provide data transmission, voice communication, and other services to user equipment (UE).

[0004] In the random access process of the NTN communication system, terminal devices located in the same waveband usually send an access request on a random access channel (RACH opportunity, RO) to achieve random access.

[0005] However, when the number of users requesting access is greater than the number of preambles configured by the RO, the more users requesting access, the fewer users who successfully access. Therefore, increasing the number of users who successfully access is an urgent problem to be solved. Summary of the Invention

[0006] The embodiments of the present application provide a method and apparatus for sending information, which can increase the number of users who successfully access the system and improve communication performance.

[0007] In a first aspect, a method for transmitting information is provided. The method can be performed by a first terminal device. The first terminal device can be the terminal device itself, or a component of the first terminal device, such as a processor, chip, or chip system of the first terminal device, or a logic module or software that implements all or part of the functions of the first terminal device. The method includes: receiving a first synchronization signal / physical broadcast channel block (SSB); and transmitting a first message based on the first SSB, the first message being used to indicate the wave position information of the wave position of the first terminal device.

[0008] Based on this solution, after receiving the first SSB from the network device, the first terminal device can send a first message based on the first SSB, where the first message is used to indicate the wave position information of the wave position where the first terminal device is located. This enables the network device to determine the wave position of the terminal device sending the access request (i.e., the first terminal device) based on the first message, and then respond accordingly using a downlink beam that can cover this wave position, thereby achieving successful access for the first terminal device and improving communication performance. Furthermore, it can increase the number of terminal devices that successfully access the network device within its coverage area.

[0009] In one possible design, the information sending method also includes: receiving a first broadcast message, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes a first SSB.

[0010] Based on this possible design, the network device can indicate the first SSB group to the first terminal device, and then the first terminal device can indicate the first SSB to the network device through a first message, so that the network device knows the wave position of the first terminal device, and can thereby respond accordingly using the downlink beam that can cover the wave position.

[0011] In one possible design, sending the first message includes: sending the first message on a first time-frequency resource.

[0012] In one possible design, the first time-frequency resource indicates the index of the first SSB, and the first message is also used for random access and radio resource control RRC to establish a connection; the information sending method also includes: receiving a second message, and the second message is used to respond to random access and RRC to establish a connection.

[0013] Based on this possible design, since the first message is also used for random access and RRC connection establishment, after the network device receives the first message on the first time-frequency resource, it can determine the wave position of the terminal device sending the first message based on the first message, and then use the beam that can cover the wave position to send the second message to achieve random access and RRC connection establishment of the first terminal device; avoid configuring the first time-frequency resource to terminal devices at different wave positions, and after receiving the first message on the first time-frequency resource, it is impossible to determine the wave position of the first terminal device, and thus cannot select the correct beam to send the second message.

[0014] In one possible design, the information sending method also includes: sending a third message on the second time-frequency resource, the third message is used for random access, and the second time-frequency resource indicates the index of the first SSB; receiving a fourth message, the fourth message is used to indicate the first time-frequency resource, and the fourth message is also used to respond to random access.

[0015] In one possible design, the first message is also used to establish an RRC connection, and the information sending method also includes: receiving a fifth message, and the fifth message is used to respond to the RRC connection establishment.

[0016] Based on this possible design, since the first message is also used to establish an RRC connection, after the network device receives the first message, it can determine the wave position of the first terminal device that requests the RRC connection to be established based on the first message, and thus select the beam that can cover the first terminal device to send the fifth message, thereby realizing the RRC connection establishment of the first terminal device. This avoids the situation where the first time-frequency resource is configured to terminal devices in different wave positions, and after the first message is received on the first time-frequency resource, the correct beam cannot be selected to send the fifth message because the wave position of the first terminal device cannot be determined.

[0017] In a second aspect, a method for receiving information is provided. The method can be performed by a network device. The network device can refer to the network device itself, or a component of the network device, such as a processor, chip, or chip system of the network device, or a logic module or software that implements all or part of the network device's functions. The method includes: sending a first SSB; receiving a first message, the first message indicating the wave position information of the wave position of the first terminal device.

[0018] Based on this solution, the network device can send a first SSB to the first terminal device, so that after receiving the first SSB from the network device, the first terminal device can send a first message based on the first SSB, where the first message is used to indicate the wave position information of the wave position where the first terminal device is located. This enables the network device to determine the wave position of the terminal device that sends the access request (i.e., the first terminal device) based on the first message, and then use the downlink beam that can cover the wave position to respond accordingly, so as to achieve successful access of the first terminal device and improve communication performance; further, it can increase the number of terminal devices that successfully access within the coverage area of ​​the network device.

[0019] In one possible design, the information sending method also includes: sending a first broadcast message, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes a first SSB.

[0020] In one possible design, receiving a first message includes: receiving the first message on a first time-frequency resource.

[0021] In one possible design, the first time-frequency resource indicates the index of the first SSB, and the first message is also used for random access and radio resource control RRC to establish a connection; the information sending method also includes: sending a second message, and the second message is used to respond to random access and RRC to establish a connection.

[0022] In one possible design, the information sending method also includes: receiving a third message on a second time-frequency resource, the third message being used for random access, and the second time-frequency resource indicating the index of the first SSB; sending a fourth message, the fourth message being used to indicate the first time-frequency resource, and the fourth message being also used to respond to random access.

[0023] In one possible design, the first message is also used to establish an RRC connection, and the information sending method also includes: sending a fifth message, and the fifth message is used to respond to the RRC connection establishment.

[0024] Among them, the technical effects brought about by any possible design of the second aspect can refer to the technical effects brought about by the corresponding design in the above-mentioned first aspect, and will not be repeated here.

[0025] In combination with the above-mentioned first and second aspects, in a possible design, the first message includes an identifier of the wave position.

[0026] In combination with the above-mentioned first and second aspects, in one possible design, the first message includes an index of a first radio frame, wherein the index of the first radio frame is used to indicate the wave position of the first terminal device, and the first SSB is located in the first radio frame.

[0027] In combination with the above-mentioned first and second aspects, in a possible design, the first message includes an index of a second radio frame and first indication information, wherein the index of the second radio frame and the first indication information are used to indicate the wave position of the first terminal device, the first indication information is used to indicate the first group of subframes, the first SSB is located in the second radio frame, and the first SSB is located in the first group of subframes.

[0028] In combination with the above-mentioned first and second aspects, in one possible design, the first broadcast message includes the index of the first SSB group, and accordingly, the first message includes the index of the first SSB group.

[0029] In combination with the above-mentioned first and second aspects, in one possible design, the first broadcast message includes information of the first position, and accordingly, the first message includes information of the first position, where the first position is the position where the network device sends the first SSB group.

[0030] In combination with the above-mentioned first and second aspects, in a possible design, the first broadcast message includes a first moment, and accordingly, the first message includes a first moment, and the first moment is the moment when the network device sends the first SSB group.

[0031] In a third aspect, a communication device is provided for implementing various methods. The communication device may be the first terminal device in the first aspect or the network device in the second aspect, or a device included in the first terminal device or the network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the implementation method, which may be implemented by hardware, software, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the functions.

[0032] In some possible designs, the communication device may include a processing module and a transceiver module. The processing module may be configured to implement the processing functionality of any of the above aspects and any possible implementations thereof. The transceiver module may include a receiving module and a transmitting module, respectively configured to implement the receiving functionality and the transmitting functionality of any of the above aspects and any possible implementations thereof.

[0033] In some possible designs, the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0034] In a fourth aspect, a communication device is provided, comprising: a processor and a memory; the memory is configured to store computer instructions, and when the processor executes the instructions, the communication device performs the method described in any one of the aspects. The communication device may be the first terminal device described in the first aspect or the network device described in the second aspect, or a device included in the first terminal device or the network device, such as a chip or a chip system.

[0035] In a fifth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is configured to communicate with a module external to the communication device; and the processor is configured to execute a computer program or instruction to cause the communication device to perform the method described in any one of the aspects. The communication device may be the first terminal device described in the first aspect or the network device described in the second aspect, or a device included in the first terminal device or network device, such as a chip or chip system.

[0036] In a sixth aspect, a communication device is provided, comprising: at least one processor configured to execute a computer program or instructions to cause the communication device to perform the method described in any one of the aspects. The communication device may be the first terminal device described in the first aspect or the network device described in the second aspect, or a device included in the first terminal device or network device, such as a chip or chip system.

[0037] In some possible designs, the communication device includes a memory for storing necessary program instructions and data. The memory may be coupled to the processor or may be independent of the processor.

[0038] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0039] It can be understood that when the communication device provided in any one of the third to sixth aspects is a chip, the sending action / function of the communication device can be understood as output information, and the receiving action / function of the communication device can be understood as input information.

[0040] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the aspects.

[0041] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the aspects.

[0042] In the ninth aspect, a communication system is provided, which includes the first terminal device in the first aspect (or the device contained in the first terminal device, such as a chip or a chip system) and the network device in the second aspect (or the device contained in the network device, such as a chip or a chip system).

[0043] Among them, the technical effects brought about by any design method in the third to ninth aspects can refer to the technical effects brought about by different design methods in the above-mentioned first or second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic diagram of a random access process provided in an embodiment of the present application;

[0045] FIG2 is a schematic diagram of another random access process provided in an embodiment of the present application;

[0046] FIG3 is a schematic diagram of sending an SSB burst set according to an embodiment of the present application;

[0047] FIG4 is a diagram showing the relationship between the number of users requesting access and the number of users successfully accessing within a single random access channel opportunity RO according to an embodiment of the present application;

[0048] FIG5 is a diagram showing the relationship between the number of users requesting access and access resources within a single random access channel opportunity RO according to an embodiment of the present application;

[0049] FIG6 is a schematic diagram of a beam distribution provided by the present application;

[0050] FIG7 is a network architecture diagram of a satellite provided by this application;

[0051] FIG8 is a network architecture diagram of a non-terrestrial network NTN and terrestrial network integration provided by the present application;

[0052] FIG9 is a diagram of another network architecture of NTN and terrestrial network integration provided by the present application;

[0053] FIG10 is a flow chart of an information sending method provided by the present application;

[0054] FIG11 is a flow chart of another information sending method provided by the present application;

[0055] FIG12 is a flow chart of another information sending method provided by the present application;

[0056] FIG13 is a flow chart of another information sending method provided by the present application;

[0057] FIG14 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0058] FIG15 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0059] FIG16 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] In the description of this application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0061] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0062] In addition, to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0063] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0064] It will be understood that the “embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It will be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0065] It can be understood that in this application, "when" and "if" both mean that corresponding processing will be taken under certain objective circumstances, and do not limit the time, nor do they require any judgment action when implementing, nor do they mean that there are other limitations.

[0066] It is understood that some optional features in the embodiments of the present application may, in certain scenarios, be implemented independently of other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects. They may also be combined with other features in certain scenarios as needed. Accordingly, the devices provided in the embodiments of the present application may also implement these features or functions accordingly, which will not be described in detail here.

[0067] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various implementation methods / implementation methods / implementation methods in each embodiment, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment can be combined to form new embodiments, implementation methods, implementation methods, or implementation methods according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application.

[0068] In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the relevant technologies of the present application is first given as follows.

[0069] 1. Non-terrestrial networks (NTN):

[0070] Currently, the fifth-generation (5G) New Radio (NR) has moved from standardization to commercial deployment. The NR standard is primarily designed to address the unique characteristics of terrestrial communications, which provide high-speed, high-reliability, and low-latency communications for user terminals.

[0071] Compared to terrestrial communications, NTN communications offer significant advantages, including global coverage, long-distance transmission, flexible networking, easy deployment, and freedom from geographical constraints. They have been widely used in a variety of fields, including maritime communications, positioning and navigation, disaster relief, scientific experiments, video broadcasting, and Earth observation. NTN networks can be integrated with terrestrial networks, leveraging their strengths and complementing their weaknesses to form a seamless, integrated global communications network covering land, sea, air, space, and ground, meeting the diverse service needs of users everywhere.

[0072] According to the height of the flight platform above the ground, the NTN can include uncrewed aerial vehicles (UAVs), high altitude platform subnetworks (HAPSs), and satellite communication subnetworks (SATCOM subnetworks).

[0073] For example, in HAPS, base stations or base station functions are deployed on high-altitude flying platforms (such as airplanes) 8km to 50km above the ground to provide coverage for terminals; in SATCOM subnetwork, base stations or base station functions are deployed on satellites more than 50km above the ground to provide coverage for terminals.

[0074] Furthermore, according to the orbital altitude of the satellite, the satellite communication system can be divided into geostationary earth orbit (GEO) satellite communication system, medium earth orbit (MEO) satellite communication system and low-earth orbit (LEO) satellite communication system.

[0075] The GEO satellite communication system is also known as the geostationary orbit satellite system. GEO satellites orbit at an altitude of 35,786 km and move at the same speed as the Earth's rotation, meaning that GEO satellites can remain stationary relative to the Earth. GEO satellite communication systems can provide large cell coverage, typically with a cell diameter of 500 km. However, GEO satellite communication also has significant disadvantages: 1) GEO satellite orbits are far from the Earth, resulting in high free-space propagation losses, which leads to tight communication link budgets. To increase transmit / receive gain, satellites must be equipped with larger antennas; 2) Communication transmission latency is high, such as a round-trip delay of around 500 milliseconds, which cannot meet the needs of real-time services; 3) GEO orbital resources are relatively scarce, launch costs are high, and coverage of the Earth's polar regions is inadequate.

[0076] MEO satellites orbit at altitudes between 2,000 and 35,786 km, enabling global coverage with a relatively small number of satellites. However, MEO satellites orbit at higher altitudes than LEO satellites, resulting in higher transmission latency compared to LEO satellite communications. Therefore, considering the advantages and disadvantages of MEO satellite communications, MEO satellites are primarily used for positioning and navigation.

[0077] The orbital altitude of LEO satellites is between 300 and 2000 km, which is lower than that of MEO satellites. They have the advantages of low transmission delay, low transmission loss, and relatively low launch cost.

[0078] 2. Random access (RA):

[0079] The purpose of random access is to enable a terminal device to access the network and obtain uplink synchronization.

[0080] The random access process can be divided into four-step random access (4-step RA) and two-step random access (4-step random access, 2-step RA).

[0081] For 4-step RA, its implementation process may include steps S101-S104 as shown in Figure 1 below:

[0082] S101: A terminal device sends a message (Msg) 1 to a base station (hereinafter referred to as the base station) to which a target cell belongs. Accordingly, the base station receives the Msg 1 from the terminal device, wherein the Msg 1 includes a preamble.

[0083] Exemplarily, Msg1 may also be referred to as a random access request message, or may also be referred to as a random access preamble message, which is not limited in the embodiment of the present application.

[0084] Optionally, the preamble may be obtained by the terminal device from a system message. Specifically, the base station broadcasts multiple preambles, and the terminal device may select any one of the multiple preambles as the preamble in step S101.

[0085] S102: The base station sends Msg2 to the terminal device. Correspondingly, the terminal device receives Msg2 from the base station. Msg2 indicates a random access response (RAR).

[0086] Exemplarily, Msg2 may also be called a RAR message.

[0087] Optionally, the RAR includes a preamble identifier, an uplink grant (UL grant), etc. For example, the UL grant can be simply understood as the time-frequency resources configured for Msg3.

[0088] S103: The terminal device sends Msg3 to the base station using the UL grant resources. Correspondingly, the base station receives Msg3 from the terminal device. Msg3 includes the identifier of the terminal device.

[0089] Exemplarily, Msg3 can be called a transmission scheduling message, or a radio resource control (RRC) connection request message. Alternatively, it can be called an RRC reestablishment request (RRCReestablishmentRequest), or an RRC resume connection request (RRCResumeReuqest), or an RRC setup request (RRCSetupRequest), which is not limited in the embodiments of the present application.

[0090] Step S104: The base station sends Msg4 to the terminal device. Correspondingly, the terminal device receives Msg4 from the base station. Msg4 indicates that the RRC connection of the terminal device has been established.

[0091] Exemplarily, Msg4 may be referred to as an RRC connection setup message.

[0092] Optionally, after step S104, the terminal device may send a hybrid automatic repeat request acknowledgement (HARQ-ACK) to the base station as a response to Msg4.

[0093] For 4-step RA, its implementation process may include steps S201-S202 as shown in Figure 2 below:

[0094] S201: The terminal device sends a MsgA to the base station. Correspondingly, the base station receives the MsgA from the terminal device. The MsgA includes a preamble and an identifier of the terminal device.

[0095] Exemplarily, MsgA may also be called a random access request message, or may also be called a random access preamble message.

[0096] S202: The base station sends a MsgB to the terminal device. Correspondingly, the terminal device receives the MsgB from the base station. The MsgB indicates that the RAR and the RRC connection of the terminal device are established.

[0097] Exemplarily, MsgB may be referred to as an RRC connection establishment message, or may also be referred to as a random access response message.

[0098] 3. Synchronization signal / physical broadcast channel block (SSB):

[0099] The base station can periodically send SSBs. An SSB period includes an SSB burst set. In each SSB period, the relative position of the SSB burst set is the same. Therefore, the SSB period can also be understood as the period of the SSB burst set. An SSB burst set includes multiple SSBs. Each SSB has an index. In an SSB period, the indexes of different SSBs are different. As shown in Figure 3, the period length of an SSB is denoted as T SSB. The first SSB cycle includes one SSB burst set, as shown by the bold box in the first cycle in Figure 3. One SSB burst set includes K SSBs, and the indexes of the K SSBs are respectively recorded as SSB#0, SSB#1, ..., SSB#K-1, where K is a positive integer and K≥2. In the second SSB cycle, it still includes one SSB burst set, as shown by the bold box in the second cycle in Figure 3. This SSB burst set is the same as the SSB burst set included in the first cycle, and the relative positions of SSBs with the same index in different SSB burst sets are the same.

[0100] Typically, the SSB cycle length is fixed; for example, the SSB cycle length can be 20 milliseconds (ms) unless the base station changes its transmission configuration. In addition, the SSB cycle can also be referred to as the SSB period or the period, which is not limited in the embodiments of the present application. In the embodiments of the present application, for the convenience of description, the SSB period is used as an example for description, which is uniformly explained here and will not be repeated later.

[0101] For the base station, the base station uses the spatial transmission parameter (i.e., the beam used to send the signal, or it can also be called a transmission beam) to send the SSB. Specifically, the base station can use different spatial transmission parameters to send different SSBs in the same period. For example, taking the SSB in the first period in Figure 3 as an example, the base station can use the spatial transmission parameter #0 (or, it can also be called beam #0, or, it can also be called transmission beam #0) to send SSB #0; similarly, the base station can use the spatial transmission parameter #1 to send SSB #1, ..., and use the spatial transmission parameter #K-1 to send SSB #K-1. Among them, the beam directions corresponding to the spatial transmission parameter #0, spatial transmission parameter #1, ..., and spatial transmission parameter #K-1 can be different, so that the base station covers terminal devices in different beam directions. For SSBs in adjacent cycles, such as the K SSBs in the second cycle in Figure 3, the base station can continue the same transmission method as in the first cycle, using spatial transmission parameter #0 to send SSB #0; spatial transmission parameter #1 to send SSB #1, ..., and spatial transmission parameter #K-1 to send SSB #K-1. In other words, the base station can use the same spatial transmission parameter to send SSBs with the same index in different cycles. In other words, each SSB index corresponds to a spatial transmission parameter.

[0102] For the terminal device, the terminal device can receive and detect the SSB. If the reference signal receive power (RSRP) of a certain SSB is greater than the RSRP threshold and the terminal device successfully demodulates and decodes, it can first determine the index of the SSB, that is, which SSB in a cycle the SSB is. Then, the terminal device determines the configuration information used by the terminal device to initiate random access based on the SSB, that is, the random access channel (RACH) opportunity (RO). Among them, RO is the time-frequency resource used to transmit the uplink access signal during the random access process, which belongs to the uplink resource.

[0103] Specifically, the association between the SSB index and the RO enables the base station to use the corresponding spatial reception parameters (i.e., the beam used to receive the signal, or also referred to as the receiving beam) to align the terminal device when the terminal device initiates an uplink access signal on the RO. For example, the base station sends an SSB with an index of SSB#0 in the direction of beam #0. When a terminal device is in the direction of beam #0, the terminal device can receive the SSB with an index of SSB#0. The terminal device can measure the RSRP of the SSB. After the RSRP of the SSB meets certain conditions, an uplink access signal (such as Msg1) can be initiated on the RO associated with the index SSB#0, and the base station can use beam #0 to receive on the RO associated with SSB#0, thereby ensuring that the signal power or energy of the received uplink access signal is high, thereby improving the success rate of random access of the terminal device.

[0104] Specifically, the terminal device determines multiple consecutive ROs associated with the index based on the SSB index, and further, can select one RO among the multiple ROs to send an uplink access signal, so that the base station can receive the uplink access signal from the terminal device on the selected RO.

[0105] For example, the association between the RO and the SSB index is achieved through mapping. When the SSB index is mapped to the RO, it is mapped in the order of time domain first, frequency domain second, and time domain third. For example, the index of an SSB can be mapped to multiple consecutive ROs.

[0106] It should be understood that the SSB index is mapped to the RO, which can also be understood as: there is an association relationship between the RO and the SSB index. The association relationship can be positive or negative. For example, when describing a certain RO, it can be described as: the RO associated with a certain index. For another example, when describing a certain index, it can be described as: the index associated with a certain RO. For an RO, the number of users requesting access in the RO is N(1-1 / M) N-1, where N represents the number of users requesting access within the RO, and M represents the number of preambles configured for the RO (i.e., the number of uplink resources used to send preambles). The relationship between N and the number of users successfully accessing the RO under different values ​​of M (taking M values ​​of 20, 30, 40, 54, and 64 as examples) is shown in Figure 4. As can be seen from Figure 4, when the value of N is less than or equal to the value of M (in this case, the load can also be considered small), the number of users successfully accessing the RO increases as the load increases; when the value of N is greater than the value of M (in this case, the load can also be considered large), the number of users successfully accessing the RO decreases as the load increases.

[0107] In order to increase the number of users who successfully access, the number of users requesting access may be matched with the access resources (eg, M). Specifically, as shown in FIG5 , the value of N is equal to the value of M.

[0108] In NR, base station deployment locations are selected based on the number of users. Therefore, base stations are often deployed in areas with a large number of users, and base stations are often not deployed in areas with fewer users (such as uninhabited areas). Furthermore, NR's broadcast beam design is a scenario-based static beam design. This means that the minimum beam gain is determined based on the coverage requirements of actual scenarios (such as stadiums and tunnels) in the existing network, thereby determining the maximum vertical and horizontal widths of the beam. Furthermore, the required number of beams and beam orientation are determined based on the beam width and coverage requirements of the scenario. This ensures that the number of users requesting access under each beam matches the access resources, thereby increasing the number of users who successfully access the network.

[0109] For example, a "7+1" configuration is used to configure seven narrow beams and one wide beam for a base station. The eight beams may be arranged as shown in FIG6 , i.e., beams #0 to #7 in FIG6 . It should be understood that the narrow beams described above refer to relatively narrow beams among the eight beams, and the wide beams refer to relatively wide beams among the eight beams.

[0110] In NR, the scanning of beams is usually uniform, that is, within an SSB burst set, the beams carried by different SSB indices point to different coverage areas. In other words, there is a one-to-one correspondence between the SSB index and the different beam directions (or different wave positions) under the base station. Among them, the mapping relationship between the SSB index and the beam is different under different values ​​of the physical cell identifier (PCI) mod 3 (mod 3) of the cell.

[0111] For example, taking beam #0 to beam #7 shown in FIG6 , the SSB burst set includes 8 SSBs, and the indexes of the 8 SSBs are SSB #0 to SSB #7, respectively. The relationship between the beam and the SSB index can be shown in the following Table 1:

[0112] Table 1

[0113] However, in the NTN scenario, due to the large number of active users in the satellite coverage area, especially for the Internet of Things (IoT) devices, IoT is the mainstream application scenario of future satellite communications, and there are many IoT devices. For example, in the future communication network, it is expected that there will be 10 per square kilometer. 8 IoT devices, which is about 100 times the number of users per square kilometer in a 5G network. However, access resources are limited, so it is impossible to match the number of users requesting access with the access resources in the NTN.

[0114] Therefore, for the NTN system, it is necessary to redesign the method for increasing the number of users who successfully access the system. One solution that can be easily thought of is to increase the frequency of beam scanning and increase the number of access requests sent to increase the number of users who successfully access the system.

[0115] However, within the coverage area of ​​a satellite, the number of active users under different beams varies greatly. For example, a satellite can send information through beam #1 and beam #2, where the coverage area of ​​beam #1 includes towns (i.e., areas with a relatively large number of users), and the coverage area of ​​beam #2 includes the ocean (i.e., areas with a relatively small number of users). Therefore, if the beam scanning method in NR (i.e., uniform scanning) is directly applied to NTN, it may result in: there is no access demand in the coverage area of ​​beam #2, but it still participates in beam scanning; or, users in the coverage area of ​​beam #2 have already successfully accessed when they first sent an access request, but they still participate in beam scanning. This results in a waste of access resources.

[0116] Therefore, a non-uniform beam scanning method is considered, that is, the scanning frequency can be increased for areas with a large number of users (such as beam #1), and the scanning frequency can be reduced for areas with a small number of users (such as beam #2), thereby saving resources, increasing the number of successfully accessed users, and reducing access delay.

[0117] For example, a satellite (or base station) may configure multiple access resources for an area with a large number of users, so that users in the area can send multiple access requests to increase the scanning beam covering the area, thereby increasing the number of users who successfully access the area.

[0118] However, compared with NR, the coverage area of ​​satellites (or base stations) in NTN is larger and corresponds to more beams, so it is not enough to support the configuration of multiple different access resources for multiple beams. That is, when access resources are configured for different beams, access resources may overlap, resulting in a decrease in the number of users who successfully access.

[0119] For example, the areas covered by beams #0 to #7 are respectively wave position #0 to wave position #7, and the SSB burst set includes 8 SSBs, and the indexes of the 8 SSBs are SSB #0 to SSB #7, respectively. Among them, the number of users requesting line access in wave position #0 to wave position #3 is relatively large, and the number of users requesting line access in wave position #4 to wave position #7 is relatively small. Therefore, the scanning frequency of beams #0 to beam #3 can be increased. Specifically, the configuration rules of the SSB burst set (or the mapping rules of the SSB burst set) can be shown in the following Table 2 (i.e., Table 2 (a) and Table 2 (b)):

[0120] Table 2(a)

[0121] Table 2(b)

[0122] Among them, Table 2(a) and Table 2(b) are the access resources configured by the satellite (or base station) at different times, respectively. Taking the time when Table 2(a) is configured before the time when Table 2(b) is configured as an example, in Table 2(a), each SSB index corresponds to a different wave position, that is, the satellite (or base station) configures different access resources for wave position #0 to wave position #7; that is, users under wave position #0 to wave position #7 can send access requests according to the access resources configured in Table 2(a). For example, wave position #4 can send an access request on the access resource corresponding to SSB #4.

[0123] In Table 2(b), multiple SSB indices correspond to the same wavelet. For example, SSB#0 and SSB#4 both correspond to wavelet#0. This means that wavelet#0 is assigned access resources corresponding to SSB#0 and SSB#4, respectively. Compared to the uniform scanning method, a user at wavelet#0 can send an access request twice (on the access resources corresponding to SSB#0 and SSB#4, respectively), improving access efficiency.

[0124] However, in the above Table 2(a), the access resources corresponding to SSB#4 are configured to the user at wave position #4, and in the above Table 2(b), the access resources corresponding to SSB#4 are configured to the user at wave position #0, causing the user at wave position #4 and the user at wave position #0 to send access requests on the same access resources, making it impossible for the satellite (or base station) to determine the wave position of the user sending the access request, and thus unable to use the accurate downlink beam to respond accordingly, resulting in access failures for the user at wave position #4 and the user at wave position #0, resulting in a reduction in the number of users who successfully access.

[0125] Based on this, an embodiment of the present application provides an information sending method, in which, after receiving a first SSB from a network device, a first terminal device can send a first message based on the first SSB, wherein the first message is used to indicate the wave position information of the wave position in which the first terminal device is located. This enables the network device to determine the wave position of the terminal device that sent the access request (i.e., the first terminal device) based on the first message, and then use the downlink beam that can cover the wave position to respond accordingly, so as to achieve successful access of the first terminal device and improve communication performance; further, it can increase the number of terminal devices that successfully access within the coverage area of ​​the network device.

[0126] It should be noted that, unless otherwise specified, in the following embodiments of this application, the beam involved refers to the physical beam sent by the base station radio frequency module, which uses devices such as phased arrays or parabolic antennas to shape and concentrate energy within a certain angle range for transmission. The beam carries electromagnetic waves, which carry information used for communication. In addition, in the following embodiments of this application, the area covered by the beam is referred to as a wave position.

[0127] The technical solutions of the embodiments of the present application can be used in NTN systems such as satellite communication systems, HAPS communications, and drones. For example, integrated communication and navigation (IcaN) systems, global navigation satellite systems (GNSS), etc. NTN systems can be integrated with traditional mobile communication systems. For example, the mobile communication system can be a fourth generation (4G) communication system (for example, a long term evolution (LTE) system), a 5G communication system (for example, a NR system), a sidelink (SL) communication system, a machine to machine (M2M) communication system, an Internet of Things (IoT) communication system, an Internet of Vehicles communication system, and future mobile communication systems.

[0128] Among them, the above-mentioned communication system applicable to this application is only an example, and the communication system and communication scenarios applicable to this application are not limited to this. The communication system and communication scenarios provided in this application do not impose any limitations on the solution of this application. They are uniformly explained here and will not be repeated below.

[0129] Exemplarily, a communication system applicable to the solution of the present application may include at least one terminal device and at least one network device. Exemplarily, the terminal devices may communicate with each other, with each other, and with each other via wired or wireless means.

[0130] Optionally, the terminal device may be a user-side device with wireless transceiver functions, or may be a chip or chip system provided in the device. The terminal device may also be referred to as user equipment (UE), terminal, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, wireless communication device, user agent or user device, etc. The terminal device may be, for example, a terminal device in IoT, device-to-device (D2D), V2X, SL, M2M, 5G network, or a future evolved public land mobile network (PLMN). The terminal device may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on water (such as ships, etc.); it may also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0131] Exemplarily, the terminal device may be a drone, an IoT device (e.g., a sensor, an electricity meter, a water meter, etc.), a V2X device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also referred to as a wearable smart device), a tablet computer or a computer with wireless transceiver function, a virtual reality (VR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a smart home, or a similar device. The terminal device can be a mobile or fixed device, which is not specifically limited in this application.

[0132] Optionally, the network device may be a network-side device with wireless transceiver functions, or may be a chip or chip system or module provided in the device. The network device is located in the radio access network (RAN) of the mobile communication system and is used to provide access services for terminal devices.

[0133] As a possible implementation, the network device can be a wireless relay node or a wireless backhaul node. For example, the network device can function as a layer 1 relay device to regenerate physical layer signals (i.e., wireless frequency filtering, frequency conversion, and amplification) without any higher protocol layers.

[0134] As another possible implementation, the network device may implement some or all of the functions of a base station. For example, the network device may be an evolutionary Node B (eNB or eNodeB) in an LTE or evolved LTE system (LTE-Advanced, LTE-A), such as a traditional macro eNB and a micro eNB in ​​a heterogeneous network scenario; or a next generation node B (gNodeB or gNB) in a 5G system; or a transmission reception point (TRP); or a base station in a future evolved PLMN; or a device that implements base station functions in IoT, D2D, V2X, SL, or M2M.

[0135] Alternatively, the network device may be a centralized unit (CU), a distributed unit (DU), a CU and a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be configured separately or included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0136] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the network device may be a network device or a module of a network device in an open radio access network (open RAN, ORAN) system. In the ORAN system, CU may also be referred to as open (open, O)-CU, DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0137] Exemplarily, the base stations in the embodiments of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc., and the embodiments of the present application do not specifically limit this.

[0138] Optionally, the network devices in the embodiments of the present application can be deployed on non-ground platforms, such as low-altitude platforms (such as drones), high-altitude platforms (such as airplanes), or satellites. Therefore, the network devices in the embodiments of the present application can also be referred to as non-ground network devices.

[0139] For example, in the case where the network device is deployed on a satellite, or the network device is a satellite, the communication system may further include an NTN gateway (also known as a gateway station). Typically, the NTN gateway is deployed on the ground. The NTN gateway can communicate with the satellite, and the link between the satellite and the NTN gateway can be called a feeder link.

[0140] As shown in Figure 7(a), when a satellite serves as a wireless relay node, or in other words, a satellite has relay and forwarding capabilities, the NTN gateway has base station functions or partial base station functions. In this case, the NTN gateway can function as a base station. Alternatively, the NTN gateway can be deployed separately from the base station. In other words, in addition to the NTN gateway, the communication system also includes a ground-based NTN base station. Figure 7(a) uses the example of separate deployment of the NTN gateway and base station.

[0141] As shown in Figure 7(b), when a satellite can perform some or all of the functions of a base station, the satellite has data processing capabilities and can be used as a base station. In this case, the NTN gateway and the satellite can transmit user-plane data of the terminal device through the satellite radio interface (SRI).

[0142] In the architecture shown in Figure 7 (i.e., (a) in Figure 7 or (b) in Figure 7), NG refers to the interface between the base station and the core network. Uu refers to the interface between the base station and the terminal device. It is understandable that as the communication system evolves, the interface name between the base station and the core network, the interface name between the base station and the terminal device, and the interface name between base stations may also change, and this application does not specifically limit this.

[0143] Optionally, when a satellite functions as a wireless relay node and has relay forwarding capabilities, it can be considered to be operating in transparent mode. When a satellite has data processing capabilities and can perform some or all of the functions of a base station, it can be considered to be operating in regenerative mode. A satellite may support only transparent mode, only regenerative mode, or both, and be able to switch between these two modes.

[0144] In some implementation scenarios, NTN and terrestrial networks can be integrated.

[0145] Figure 8 shows a network architecture diagram of a converged NTN and terrestrial network according to an embodiment of the present application. In the architecture shown in Figure 8, satellites 1, 2, and 3 operate in regenerative mode. Satellites can function as NTN base stations, or NTN base stations can be deployed on satellites.

[0146] Figure 9 shows another NTN and terrestrial network architecture diagram for an embodiment of the present application. In the architecture shown in Figure 9, satellites 1, 2, and 3 operate in transparent transmission mode, requiring the deployment of additional NTN base stations. These NTN base stations refer to base stations within the NTN.

[0147] In addition, the architecture shown in Figure 8 or Figure 9 above may also include a ground base station, which refers to a base station in a ground network. NTN base stations and ground base stations can be interconnected through a common core network. As a bearer network, the core network provides an interface to the data network, provides communication connection, authentication, management, policy control, and data service carrying for terminal devices. Exemplarily, the core network may include an access and mobility management function (AMF) network element, a session management function (SMF) network element, an authentication server function (AUSF) network element, a policy control function (PCF) network element, a user plane function (UPF) network element, and other network elements.

[0148] Alternatively, NTN base stations and terrestrial base stations can also achieve more timely assistance and interconnection through interfaces defined between base stations. For example, the interface between base stations can be an Xn interface, and the interface between a base station and the core network can be an NG interface. Of course, other implementations of the interface between base stations and the interface between a base station and the core network are also possible, and this application does not specifically limit this.

[0149] Optionally, in embodiments of the present application, satellites can provide services to terminal devices via beams. For example, different beams can provide services to terminal devices via one or more of time division, frequency division, and space division. On the one hand, satellites can operate in either regenerative mode or transparent mode. On the other hand, satellites can operate in either non-staring mode or staring mode. Satellites can be LEO satellites, MEO satellites, GEO satellites, etc., without limitation.

[0150] It is understandable that the satellites in the architectures described in Figures 7 to 9 can be replaced by ground payloads on other flying platforms such as drones and airplanes.

[0151] It should be noted that the communication system described in the embodiment of the present application is intended to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0152] The following describes the information sending method provided in the embodiment of the present application by taking the interaction between a network device and a terminal device as an example in combination with the communication system shown in Figures 7 to 9.

[0153] It should be noted that in the following embodiments of the present application, the message names, parameter names, or information names between devices are only examples. In other embodiments, they may also be other names, and the method provided in this application does not make specific limitations on this.

[0154] It is understood that in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0155] For example, the following embodiments are described using the aforementioned flying platform as a satellite, that is, satellite communications in NTN as an example. Of course, the method can also be applied to other scenarios in NTN, such as HAPS, without specific limitation.

[0156] 10 is a flowchart of a method for sending information provided in an embodiment of the present application. The method for sending information may include the following steps:

[0157] S1001. The network device sends a first SSB to the first terminal device. Correspondingly, the first terminal device receives the first SSB from the network device.

[0158] Optionally, the network device may transmit an SSB burst set, wherein the SSB burst set includes multiple SSBs, and the multiple SSBs include the first SSB. Further, the network device may transmit the multiple SSBs using one or more beams.

[0159] As an example, multiple SSBs in an SSB burst set correspond to different wave positions. That is, the network device can use different beams to send the multiple SSBs respectively. Exemplarily, in this example, the correspondence between multiple SSBs and wave positions (or, the configuration rules of the SSB burst set) can be as shown in Table 2(a) above. For details, please refer to the relevant description of Table 2(a) above, which will not be repeated here.

[0160] As another example, at least one SSB among the multiple SSBs in the SSB burst set corresponds to multiple beam positions. That is, the network device can use the same beam to send the at least one SSB. Exemplarily, in this example, the correspondence between the multiple SSBs and the beam positions (or, the configuration rules of the SSB burst set) can be as shown in Table 2(b) above. For details, please refer to the relevant description of Table 2(b) above, which will not be repeated here.

[0161] Optionally, the network device may send the first SSB through different beams at different times. That is, at different times, the network device configures the access resources indicated by the index of the first SSB (or the access resources corresponding to the index of the first SSB) to terminal devices under different beam coverage (or wave positions).

[0162] For example, taking the configuration rules shown in Table 2 above as an example, the index of the first SSB can be SSB#4 in Table 2. It can be seen from Table 2 above that the network device first sends SSB#4 through beam #4, and configures the access resources indicated by SSB#4 to the terminal device under wave position #4 (that is, the coverage range of beam #4), and then sends SSB#4 through beam #0, and configures the access resources indicated by SSB#4 to the terminal device under wave position #0 (that is, the coverage range of beam #0).

[0163] Exemplarily, the access resources indicated by the index of the first SSB can be understood as: one or more ROs associated with the index of the first SSB; since RO refers to the time-frequency resources used to transmit uplink access signals during the random access process, the access resources indicated by the index of the first SSB can also be understood as: time-frequency resources associated with the index of the first SSB.

[0164] S1002: The first terminal device sends a first message according to the first SSB. Accordingly, the network device receives the first message from the first terminal device. The first message indicates the waveband information of the first terminal device.

[0165] Optionally, the first terminal device sends the first message, including: the first terminal device sends the first message to the network device on the first time-frequency resource, and accordingly, the network device receives the first message from the first terminal device on the first time-frequency resource.

[0166] Example 1: The first time-frequency resource is the access resource indicated by the index of the first SSB, or in other words, the first time-frequency resource indicates the index of the first SSB, that is, the network device can determine the index of the first SSB based on the first time-frequency resource. Alternatively, it can also be considered that: the index of the first SSB indicates the first time-frequency resource, that is, the first terminal device can obtain the time-frequency resource associated with it (that is, the first time-frequency resource) based on the index of the first SSB.

[0167] Exemplarily, in this example, sending the first message according to the first SSB can be understood as: sending the first message on the first time-frequency resource indicated by the index of the first SSB.

[0168] Optionally, in this example, the first message is also used for random access and RRC connection establishment. Further, as shown in FIG11 , the information sending method further includes the following step S1003:

[0169] S1003: The network device sends a second message to the first terminal device. Correspondingly, the first terminal device receives the second message from the network device. The second message is used to respond to random access and RRC connection establishment.

[0170] Optionally, since the first message is used to indicate the wave position information of the wave position where the first terminal device is located, when the access resource indicated by the index of the first SSB (i.e., the first time-frequency resource) is configured for terminal devices in different wave positions to request access, the network device can first determine the wave position corresponding to the first time-frequency resource based on the first time-frequency resource (i.e., the wave position of the terminal device that can send an access request on the first time-frequency resource, such as the different wave positions mentioned above), and further, according to the indication of the first message, determine the wave position of the first terminal device from the wave position corresponding to the first time-frequency resource. In this way, the accurate beam can be selected to send the second message to the first terminal device.

[0171] Exemplarily, taking the configuration rules shown in Table 2 above as an example, the index of the first SSB may be SSB#4 in Table 2. As can be seen from Table 2 above, the network device sends SSB#4 successively through beam #4 and beam #0, so that the access resource indicated by the index of the first SSB (i.e., the first time-frequency resource) is respectively configured to the terminal device under wave position #4 (i.e., the coverage range of beam #4) and the terminal device under wave position #0 (i.e., the coverage range of beam #0). Therefore, when the network device receives the first message on the first time-frequency resource, it first determines the wave position corresponding to the first time-frequency resource (i.e., wave position #4 and wave position #0) based on the first time-frequency resource. Further, it can determine the wave position of the first terminal device based on the wave position information indicated by the first message, thereby sending the second message using the beam that can cover the wave position.

[0172] Optionally, the first message is also used for random access and RRC connection establishment, which can be understood as: the first message is used to request random access and request RRC connection establishment, or in other words, the first message can be a random access request and an RRC connection establishment request.

[0173] Exemplarily, the first message may be carried in MsgA, and correspondingly, the second message is MsgB.

[0174] Based on this example, since the first message is also used for random access and RRC connection establishment, after the network device receives the first message on the first time-frequency resource, it can determine the wave position of the terminal device that sends the first message based on the first message, and then use the beam that can cover the wave position to send the second message to achieve random access and RRC connection establishment for the first terminal device; avoid configuring the first time-frequency resource to terminal devices at different wave positions, and after receiving the first message on the first time-frequency resource, it is impossible to determine the wave position of the first terminal device, and thus cannot select the correct beam to send the second message.

[0175] Example 2: The second time-frequency resource is the access resource indicated by the first SSB, or in other words, the second time-frequency resource indicates the index of the first SSB, that is, the network device can determine the first SSB based on the second time-frequency resource. Alternatively, it can also be considered that: the index of the first SSB indicates the second time-frequency resource, that is, the first terminal device can obtain the time-frequency resource associated with the first SSB (i.e., the second time-frequency resource) based on the index of the first SSB.

[0176] Exemplarily, in this example, sending the first message according to the first SSB can be understood as: determining the second time-frequency resource according to the index of the first SSB, and further determining the first time-frequency resource according to the second time-frequency resource, thereby sending the first message on the first time-frequency resource.

[0177] Optionally, as shown in FIG12 , the information sending method further includes the following steps S1004 to S1005. That is, after determining the second time-frequency resource, the first terminal device may determine the first time-frequency resource according to the following steps S1004 to S1005:

[0178] S1004: The first terminal device sends a third message to the network device on the second time-frequency resource. Correspondingly, the network device receives the third message from the first terminal device on the second time-frequency resource. The third message is used for random access.

[0179] S1005: The network device sends a fourth message to the first terminal device, and correspondingly, the first terminal device receives the fourth message from the network device, wherein the fourth message is used to indicate the first time-frequency resource and is also used to respond to random access.

[0180] Illustratively, the third message may be Msg1, and correspondingly, the fourth message may be Msg2.

[0181] Optionally, since the first message is carried on the first time-frequency resource, when the access resource indicated by the index of the first SSB (i.e., the second time-frequency resource) is configured for terminal devices requesting access at different wave positions, the network device cannot further determine the wave position where the first terminal device is located after determining the wave position that the first terminal device may be in based on the second time-frequency resource (i.e., the wave position where the terminal device that can send an access request on the second time-frequency resource is located, such as the different wave positions mentioned above).

[0182] Exemplarily, taking the configuration rules shown in Table 2 above as an example, the index of the first SSB may be SSB#4 in Table 2. As can be seen from Table 2 above, the network device sends SSB#4 through beam #4 and beam #0 respectively, so that the access resource indicated by the index of the first SSB (i.e., the second is the time-frequency resource) is respectively configured to the terminal device under wave position #4 (i.e., the coverage range of beam #4) and the terminal device under wave position #0 (i.e., the coverage range of beam #0). Therefore, when the network device receives the third message on the second time-frequency resource, it cannot determine whether the third message comes from the terminal device under wave position #0 or the terminal device under wave position #4.

[0183] Optionally, since the network device cannot determine the wavelength of the terminal device that sends the third message, step S1005 may include the following two possible implementations:

[0184] In one possible implementation, the network device uses a blind transmission mechanism to send the fourth message to all terminal devices at the wave position corresponding to the second time-frequency resource, so that the first terminal device at the wave position corresponding to the second time-frequency resource can also receive the fourth message.

[0185] Exemplarily, the waveband corresponding to the second time-frequency resource can be understood as: the coverage area of ​​the beam used to send the first SSB. Since the second time-frequency resource is configured for terminal devices requesting access at different wavebands, the second time-frequency resource corresponds to multiple wavebands.

[0186] Optionally, the network device may send the fourth message to terminal devices in multiple wavelengths in the following two ways:

[0187] Method 1: The network device sends the fourth message using a multi-peak beam.

[0188] Exemplarily, in this way, the network device can determine the peaks of the multi-peak beam based on the multiple wave positions corresponding to the second time-frequency resource, that is, the number of peaks of the multi-peak beam is equal to the number of multiple wave positions corresponding to the second time-frequency resource, and the peaks of the multi-peak beam respectively correspond to one wave position in the multiple wave positions, so that after the network device uses the multi-peak beam to send the fourth message, the terminal devices in the multiple wave positions can all receive the fourth message.

[0189] Method 2: The network device sends the fourth message in a time-division manner.

[0190] Exemplarily, under the second method, the network device can use different beams to send the fourth message at different times according to the multiple wavebands corresponding to the second time-frequency resources, wherein the coverage range of the beam used to send the fourth message includes one waveband of the multiple wavebands, so that after the network device uses multiple beams to send the fourth message, the terminal devices in the multiple wavebands can all receive the fourth message.

[0191] In another possible implementation, the network device uses a beam direction deduction method to determine the wave position that the terminal device sending the third message may be in based on the beam direction of the received third message, and then selects a beam that can cover the wave position to send the fourth message to the terminal devices in the area, so that the first terminal device can also receive the fourth message.

[0192] Optionally, in this possible implementation, the network device determines that the terminal device sending the third message may be located in one or more beam positions. When a beam position is determined, the network device may select a beam that covers the beam position to send the fourth message to the terminal device in the beam position, so that the first terminal device can also receive the fourth message.

[0193] Optionally, when multiple beam positions are determined, the network device may send the fourth message using a multi-peak beam, or send the fourth message using a time division method.

[0194] For example, when the network device uses a multi-peak beam to send the fourth message, the number of peaks of the multi-peak beam is equal to the number of multiple wave positions, and the peaks of the multi-peak beam correspond to one wave position in the multiple wave positions respectively. Therefore, after the network device uses the multi-peak beam to send the fourth message, the terminal devices in the multiple wave positions can all receive the fourth message.

[0195] In the case where the network device uses a time-division method to send the fourth message, the network device uses different beams to send the fourth message at different times, wherein the coverage range of the beam used to send the fourth message respectively includes one waveband among multiple wavebands, so that after the network device uses multiple beams to send the fourth message, terminal devices within multiple wavebands can all receive the fourth message.

[0196] Optionally, in this example, since terminal devices at multiple wave positions have all received the fourth message, in the above step S1001, the network device may receive the first message from terminal devices at different wave positions on the first time-frequency resource.

[0197] Optionally, in this example, the first message is also used to establish an RRC connection. Further, as shown in FIG12 , the information sending method further includes the following step S1006:

[0198] S1006: The network device sends a fifth message to the first terminal device. Correspondingly, the first terminal device receives the fifth message from the network device. The fifth message is used to respond to the RRC connection establishment.

[0199] Optionally, since the first message is used to indicate the wave position information of the wave position where the first terminal device is located, when multiple terminal devices located in multiple wave positions all send the first message to the network device, the network device can determine the wave position corresponding to the first time-frequency resource (that is, the wave position of the terminal device that can send the first message on the first time-frequency resource, such as the multiple wave positions mentioned above) based on the first time-frequency resource used to receive the first message. Further, according to the indication of the first message, the wave position of the first terminal device is determined from the wave positions corresponding to the first time-frequency resource. In this way, an accurate beam can be selected to send the fifth message to the first terminal device.

[0200] For example, taking SSB#4 indicating the first time-frequency resource, and the network device sending SSB#4 through beam #4 and beam #0 respectively, so that the first time-frequency resource is respectively configured to the terminal device under wave position #4 and the terminal device under wave position #0, when the network device receives the first message on the first time-frequency resource, it first determines the wave position (wave position #4 and wave position #0) corresponding to the first time-frequency resource based on the first time-frequency resource, and further, it can determine the wave position of the first terminal device based on the wave position information indicated by the first message, thereby sending the fifth message using the beam that can cover the wave position.

[0201] Optionally, the first message is also used to establish an RRC connection, which can be understood as: the first message is used to request the RRC to establish a connection, or in other words, the first message can be a request to establish an RRC connection.

[0202] Exemplarily, the first message may be carried in Msg3, and correspondingly, the fifth message is Msg4.

[0203] Based on this example, since the first message is also used to establish an RRC connection, after the network device receives the first message, it can determine the wave position of the first terminal device that requests the RRC connection to be established based on the first message, and thus select the beam that can cover the first terminal device to send the fifth message, so as to achieve the RRC connection establishment of the first terminal device. This avoids the situation where the first time-frequency resource is configured to terminal devices in different wave positions, and after receiving the first message on the first time-frequency resource, the correct beam cannot be selected to send the fifth message because the wave position of the first terminal device cannot be determined.

[0204] In the information transmission method provided in the embodiments of the present application, after receiving a first SSB from a network device, a first terminal device can send a first message based on the first SSB, wherein the first message is used to indicate the wave position information of the wave position in which the first terminal device is located. This enables the wave position of the terminal device (i.e., the first terminal device) that sent the access request to be determined based on the first message, and then a corresponding response is made using a downlink beam that can cover the wave position, thereby achieving successful access of the first terminal device and improving communication performance. Furthermore, the number of terminal devices that successfully access the network device within its coverage area can be increased.

[0205] The above is an overall description of the information sending method provided in the embodiment of the present application. The following is a detailed introduction to the "first message" involved in the above embodiment. For example, the first message may include the following four possible implementation forms:

[0206] As a first possible implementation form, the first message includes the wave position information of the wave position that the first terminal device is located in. For the convenience of description, the "wave position information of the wave position that the first terminal device is located in" is referred to as "wave position information" below, and is uniformly described here and not repeated.

[0207] Exemplarily, the wave position information may be an identifier (ID) of the wave position where the first terminal device is located; for example, the wave position information may be an index of the wave position where the first terminal device is located. Alternatively, the wave position information may be information that can indicate the wave position where the first terminal device is located, which is not limited in the embodiments of the present application. The following description takes the wave position information as the ID of the wave position where the first terminal device is located as an example.

[0208] As an example, the waveband ID refers to the absolute ID of the waveband where the first terminal device is located.

[0209] Optionally, in this example, the waveband ID is indicated by the network device to the first terminal device. For example, the first terminal device may pre-store a global waveband ID, and the network device may then indicate the waveband ID of the first terminal device from the global waveband ID. This allows the network device to uniquely identify the waveband based on the waveband ID included in the first message when the first terminal device sends the first message.

[0210] Optionally, the network device may indicate the ID of the waveband where the first terminal device is located to the first terminal device through a broadcast message, or the network device may send indication information to the first terminal device to indicate the ID of the waveband where the first terminal device is located.

[0211] For example, assuming that the number of global waveband IDs is 1024 and the 1024 waveband IDs are waveband #0 to waveband #1023, the first message may use 10 bits to indicate the ID of the waveband where the first terminal device is located. For example, if the waveband ID where the first terminal device is located is waveband #128, the 10 bits may be 0010000000.

[0212] As another example, the waveband ID refers to the relative ID of the waveband where the first terminal device is located.

[0213] Optionally, in this example, the beam position ID is the ID of the beam position where the first terminal device is located among multiple beams configured by the network device when the coverage range of the network device is the first coverage range. The first terminal device is located within the first coverage range.

[0214] Optionally, the first coverage range is determined based on the ephemeris of the network device. Exemplarily, the network device can divide the area covered on its movement path into multiple sub-areas based on its ephemeris; wherein the multiple sub-areas include the first coverage range. Furthermore, the beam configured in each sub-area can be determined as a beam group associated with the sub-area, so that the network device can communicate with the terminal device in the sub-area through the beam group. In particular, since each beam in the beam group corresponds to a wave position, the number of wave positions corresponding to the beam group is the same as the number of beams in the beam group. Therefore, the beam group associated with the sub-area can also be understood as: a wave position group associated with the sub-area.

[0215] Optionally, the number of wavebands in the waveband groups associated with different sub-areas may be the same or different. The network device may separately configure the ID of each waveband in each waveband group; in this case, within a waveband group, each waveband has a relative ID.

[0216] Optionally, the network device may inform the first terminal device in advance of the relationship between the multiple sub-areas and the waveband groups associated therewith.

[0217] For example, taking the case where the number of sub-areas is 4 and the wavelet groups in each sub-area include 16 wavelets, the relationship between the multiple sub-areas and the wavelet groups associated therewith satisfies the relationship shown in Table 3 below:

[0218] Table 3

[0219] Alternatively, the relationship between multiple sub-areas and their associated wavegroups can be represented by a set, for example, {sub-area #1: wavegroup #1}; {sub-area #2: wavegroup #2}; {sub-area #3: wavegroup #3}; {sub-area #4: wavegroup #4}.

[0220] Optionally, the network device can inform the terminal devices in the current sub-area of ​​the wave group corresponding to the current sub-area, and inform the terminal devices in different wave positions of the ID of the wave position in which they are located, so that when the first terminal device sends the first message, the network device can determine the unique wave position based on the wave position ID included in the first message.

[0221] Exemplarily, when the current sub-area is sub-area #1, the waveband group #1 corresponding to sub-area #1 can be informed to the terminal devices under sub-area #1, and the ID of the waveband in which it is located is sent to the terminal devices under different wavebands through the beams corresponding to the wavebands in waveband group #1. Taking waveband group #1 as an example, which includes 16 wavebands, and the 16 wavebands are waveband #0 to waveband #15, the network device can send the waveband ID to different wavebands through the 16 beams corresponding to the 16 wavebands, respectively, wherein each beam sends the ID of its corresponding waveband. For example, beam #0 sends waveband #0, and so on, beam #15 sends beam #15, so that the terminal devices located at the 16 wavebands all know the ID of the waveband in which they are located.

[0222] Optionally, the network device may indicate the ID of the waveband where the first terminal device is located to the first terminal device through a broadcast message, or the network device may send indication information to the first terminal device to indicate the ID of the waveband where the first terminal device is located.

[0223] For example, if a waveband group within a sub-area includes 16 wavebands, and the IDs of the 16 wavebands are waveband #0 to waveband #15, the first message can use 5 bits to indicate the ID of the waveband where the first terminal device is located. For example, if the ID of the waveband where the first terminal device is located is waveband #8, the 5 bits can be 01000.

[0224] As a second possible implementation form, the first message includes information of a first radio frame, wherein the information of the first radio frame is used to indicate the wave position of the first terminal device, and the first SSB is located in the first radio frame.

[0225] Exemplarily, the information of the first wireless frame may include the index of the first wireless frame, or may be other information used to indicate the first wireless frame (such as partial bits of the first wireless frame index), which is not limited in the embodiment of the present application.

[0226] Exemplarily, the first wireless frame may include an SSB burst set, wherein the SSB burst set includes multiple SSBs, and the multiple SSBs include the first SSB.

[0227] Optionally, in this possible implementation, each radio frame includes an SSB burst set, and the configuration rules of the SSB burst sets in different radio frames may be the same or different. For example, the configuration rules in the SSB burst set may be as shown in Table 2(a) or Table 2(b) above.

[0228] Exemplarily, the network device can determine the wave position corresponding to the first time-frequency resource (i.e., the wave position of the terminal device that can send the first message on the first time-frequency resource, such as the wave position of the first terminal device) based on the first time-frequency resource that carries the first message. According to Table 2 (a) or Table 2 (b) above, the number of wave positions corresponding to the first time-frequency resource is greater than or equal to 1, that is, the first time-frequency resource is configured to a terminal device under at least one wave position (for example, when SSB#4 indicates the first time-frequency resource, the first time-frequency resource corresponds to a terminal device under two wave positions (i.e., wave position #4 and wave position #0)); therefore, when the first time-frequency resource is configured to terminal devices under multiple wave positions, the network device cannot know the exact wave position of the terminal device (such as the first terminal device) that sends the first message based on the first time-frequency resource alone, and thus may not be able to select the correct beam to respond to the first message. Therefore, when determining the wave position corresponding to the first time-frequency resource based on the first message, the configuration rules of the SSB burst set within the first wireless frame can be determined based on the information of the first wireless frame, thereby determining the exact wave position of the terminal device that sends the first message on the first time-frequency resource (that is, the wave position where the first terminal device is located).

[0229] For example, SSB#4 indicates the first time-frequency resource, and the network device sends SSB#4 through beam #4 and beam #0 respectively, so that the first time-frequency resource is respectively configured to the terminal device under wave position #4 and the terminal device under wave position #0, and the first wireless frame includes SSB#0 to SSB#7 shown in Table 2(a). For example, when the network device receives the first message on the first time-frequency resource, it first determines the wave position (i.e., wave position #4 and wave position #0) corresponding to the first time-frequency resource based on the first time-frequency resource, and further determines the configuration rules of Table 2(a) according to the first wireless frame, so as to know that the first time-frequency resource is configured to the terminal device under beam #4 under the configuration rules of Table 2(a), so it can be determined that the wave position information of the first terminal device is wave position #4.

[0230] As a third possible implementation form, the first message includes information of a second radio frame and first indication information, wherein the information of the second radio frame and the first indication information are used to indicate the wave position of the first terminal device, the first indication information is used to indicate the first group of subframes, the first SSB is located in the second radio frame, and the first SSB is located in the first group of subframes.

[0231] Exemplarily, the information of the second radio frame may include the index of the second radio frame, or may be other information used to indicate the second radio frame (such as partial bits of the second radio frame index), which is not limited in the embodiments of the present application.

[0232] Exemplarily, in this possible implementation form, the second wireless frame includes multiple SSB burst sets, and each SSB burst set includes multiple SSBs, and the multiple SSBs include the first SSB, that is, each SSB burst set includes the first SSB.

[0233] Optionally, different SSB burst sets are located in different groups of subframes in the second radio frame, and the configuration rules of different SSB burst sets may be the same or different. For example, the configuration rules in the SSB burst set may be as shown in Table 2(a) or Table 2(b) above.

[0234] Exemplarily, the network device can determine the wave position corresponding to the first time-frequency resource based on the first time-frequency resource that carries the first message. In the case where the first time-frequency resource is configured to terminal devices under multiple wave positions, the network device cannot know the exact wave position of the terminal device (such as the first terminal device) that sends the first message based on the first time-frequency resource alone, and thus may not be able to select the correct beam to respond to the first message. Therefore, when the network device determines the wave position corresponding to the first time-frequency resource based on the first message, it can determine the configuration rules of the SSB burst set in the first group of subframes based on the information of the second wireless frame and the first indication information, thereby determining the wave position of the terminal device that sends the first message on the first time-frequency resource (that is, the wave position of the first terminal device).

[0235] For example, SSB#4 indicates the first time-frequency resource, and the network device sends SSB#4 through beam #4 and beam #0 respectively, so that the first time-frequency resource is respectively configured to the terminal device under wave position #4 and the terminal device under wave position #0, and the second wireless frame includes SSB#0 to SSB#7 shown in Table 2(a) and Table 2(b), wherein SSB#0 to SSB#7 shown in Table 2(a) are located in the first group of subframes. For example, when the network device receives the first message on the first time-frequency resource, it first determines the wave position (i.e., wave position #4 and wave position #0) corresponding to the first time-frequency resource based on the first time-frequency resource, and further determines the configuration rule of Table 2(a) based on the information of the second wireless frame and the first indication information, so as to know that the first time-frequency resource is configured to the terminal device under beam #4 under the configuration rule of Table 2(a), so it can be determined that the wave position information of the first terminal is wave position #4.

[0236] As a fourth possible implementation, the first message includes information of a first SSB group, wherein the first SSB includes a first SSB. Exemplarily, the first SSB group may be an SSB burst set.

[0237] Optionally, the information of the first SSB group is sent by the network device to the first terminal device. For example, the information of the first SSB group can be carried in the first broadcast message. Exemplarily, before step S1001, as shown in FIG13 , the method further includes the following step S1000:

[0238] S1000: A network device sends a first broadcast message, and correspondingly, a first terminal device receives the first broadcast message from the network device, wherein the first broadcast message is used to indicate a first SSB group.

[0239] Optionally, in this possible implementation, the configuration rules of different SSB groups may be the same or different. For example, the configuration rules in the SSB group may be as shown in Table 2(a) or Table 2(b) above.

[0240] Exemplarily, the network device can determine the wave position corresponding to the first time-frequency resource based on the first time-frequency resource that carries the first message. In the case where the first time-frequency resource is configured to terminal devices under multiple wave positions, the network device cannot know the exact wave position of the terminal device (such as the first terminal device) that sends the first message based on the first time-frequency resource alone, and thus may not be able to select the correct beam to respond to the first message. Therefore, when determining the wave position corresponding to the first time-frequency resource based on the first message, the configuration rule of the first SSB group can be determined based on the information of the first SSB group, thereby determining the wave position of the terminal device that sends the first message on the first time-frequency resource (that is, the wave position where the first terminal device is located).

[0241] For example, SSB#4 indicates the first time-frequency resource, and the network device sends SSB#4 through beam #4 and beam #0 respectively, so that the first time-frequency resource is respectively configured to the terminal device under wave position #4 and the terminal device under wave position #0, and the first group of SSB includes SSB#0 to SSB#7 shown in Table 2(a). For example, when the network device receives the first message on the first time-frequency resource, it first determines the wave position (i.e., wave position #4 and wave position #0) corresponding to the first time-frequency resource based on the first time-frequency resource, and further determines the configuration rules of Table 2(a) based on the information of the first SSB group, so as to know that the first time-frequency resource is configured to the terminal device under beam #4 under the configuration rules of Table 2(a), so it can be determined that the wave position information of the wave position where the first terminal is located is wave position #4.

[0242] As a first example, the information of the first SSB group may be an index of the first SSB group. That is, the first broadcast message includes the index of the first SSB group, and accordingly, the first message includes the index of the first SSB group.

[0243] As a second example, the information of the first SSB group may be information of the first position. That is, the first broadcast message includes information of the first position, and accordingly, the first message includes information of the first position. The first position is the position at which the network device sends the first SSB group.

[0244] Exemplarily, the network device can determine the first SSB sent at the first position based on the information of the first position, and further determine the configuration rule of the first SSB group, so as to obtain the wave position corresponding to the first time-frequency resource under the configuration rule (that is, the wave position where the first terminal device is located).

[0245] As a third example, the information of the first SSB group may be the first time. That is, the first broadcast message includes the first time, and accordingly, the first message includes the first time. The first time is the time when the network device sends the first SSB group.

[0246] Exemplarily, the network device can determine the first SSB it sends at the first moment based on the first moment, and further determine the configuration rule of the first SSB group, so as to obtain the wave position corresponding to the first time-frequency resource under the configuration rule (that is, the wave position where the first terminal device is located).

[0247] Based on this possible implementation form, based on the design of the information of the first SSB group, since the random access process is short, the number of SSB burst sets configured by the network device for the terminal device will not be too many, so the first SSB group can be represented by a small number of bits, thereby reducing signaling overhead.

[0248] It should be noted that the above embodiments only exemplarily describe the possible implementation forms of the wave position information, radio frame information (such as information of the first radio frame and / or information of the second radio frame), and information of the first SSB group. In fact, the above wave position information, radio frame information, and information of the first SSB group may also have other implementation forms, which are not limited by the embodiments of the present application.

[0249] It is understood that in each of the above embodiments, the methods and / or steps implemented by the network device may also be implemented by components applicable to the network device (e.g., a processor, chip, chip system, circuit, logic module, or software); and the methods and / or steps implemented by the first terminal device may also be implemented by components applicable to the first terminal device (e.g., a processor, chip, chip system, circuit, logic module, or software). The chip system may be composed of a chip, or may include a chip and other discrete components.

[0250] It is understandable that, in order to realize the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0251] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0252] Communication Device Figure 14 shows a schematic structural diagram of a communication device 140. The communication device 140 includes a processing module 1401 and a transceiver module 1402. The communication device 140 can be used to implement the functions of the above-mentioned network device or the first terminal device.

[0253] In some embodiments, the communication device 140 may further include a storage module (not shown in FIG. 14 ) for storing program instructions and data.

[0254] In some embodiments, the transceiver module 1402, which may also be referred to as a transceiver unit, is configured to implement a transmitting and / or receiving function. The transceiver module 1402 may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0255] In some embodiments, the transceiver module 1402 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the network device or the first terminal device in the above method embodiment, and / or used to support other processes of the technology described herein; the processing module 1401 may be used to execute the processing steps (such as determination, etc.) performed by the network device or the first terminal device in the above method embodiment, and / or used to support other processes of the technology described herein.

[0256] When the communication device 140 is used to implement the functions of the first terminal device:

[0257] In some embodiments, the transceiver module 1402 is used to receive a first SSB; the transceiver module 1402 is also used to send a first message based on the first SSB, and the first message is used to indicate the wave position information of the wave position of the first terminal device.

[0258] Optionally, the transceiver module 1402 is further used to receive a first broadcast message, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes a first SSB.

[0259] Optionally, the transceiver module 1402 is further configured to send a first message on a first time-frequency resource.

[0260] Optionally, the transceiver module 1402 is further configured to receive a second message, where the second message is used to respond to random access and establish an RRC connection.

[0261] Optionally, the transceiver module 1402 is also used to send a third message on the second time-frequency resource, the third message is used for random access, and the second time-frequency resource indicates the index of the first SSB; the transceiver module 1402 is also used to receive a fourth message, the fourth message is used to indicate the first time-frequency resource, and the fourth message is also used to respond to random access.

[0262] Optionally, the transceiver module 1402 is further used to receive a fifth message, where the fifth message is used to respond to the RRC connection establishment.

[0263] When the communication device 140 is used to implement the functions of the above-mentioned network device:

[0264] In some embodiments, the transceiver module 1402 is used to send a first SSB; the transceiver module 1402 is also used to receive a first message, and the first message is used to indicate the wave position information of the wave position where the first terminal device is located.

[0265] Optionally, the transceiver module 1402 is further used to send a first broadcast message, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes a first SSB.

[0266] Optionally, the transceiver module 1402 is further configured to receive a first message on a first time-frequency resource.

[0267] Optionally, the transceiver module 1402 is further configured to send a second message, where the second message is used to respond to random access and establish an RRC connection.

[0268] Optionally, the transceiver module 1402 is also used to receive a third message on the second time-frequency resource, the third message is used for random access, and the second time-frequency resource indicates the index of the first SSB; the transceiver module 1402 is also used to send a fourth message, the fourth message is used to indicate the first time-frequency resource, and the fourth message is also used to respond to random access.

[0269] Optionally, the transceiver module 1402 is further used to send a fifth message, where the fifth message is used to respond to the RRC connection establishment.

[0270] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0271] In the present application, the communication device 140 may be presented in the form of functional modules divided in an integrated manner. The "module" here may refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0272] In some embodiments, when the communication device 140 in Figure 14 is a chip or a chip system, the function / implementation process of the transceiver module 1402 can be implemented through the input and output interface (or communication interface) of the chip or chip system, and the function / implementation process of the processing module 1401 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0273] Since the communication device 140 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiments and will not be repeated here.

[0274] As a possible product form, the first terminal device or network device described in the embodiment of the present application can also be implemented using the following: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout this application.

[0275] As another possible product form, the first terminal device or network device described in the embodiment of the present application can be implemented by a general bus architecture. For ease of explanation, refer to Figure 15, which is a structural diagram of a communication device 1500 provided in an embodiment of the present application. The communication device 1500 includes a processor 1501 and may optionally further include a transceiver 1502. The communication device 1500 can be a network device, or a chip or chip system therein; or, the communication device 1500 can be a first terminal device, or a chip or module therein. Figure 15 only shows the main components of the communication device 1500. In addition to the processor 1501 and the transceiver 1502, the communication device may further include a memory 1503, and an input and output device (not shown in the figure).

[0276] Optionally, processor 1501 is primarily used to process communication protocols and communication data, as well as control the entire communication device, execute software programs, and process software program data. Memory 1503 is primarily used to store software programs and data. Transceiver 1502 may include a radio frequency circuit and an antenna. The radio frequency circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0277] Optionally, the processor 1501 , the transceiver 1502 , and the memory 1503 may be connected via a communication bus.

[0278] When the communication device is powered on, the processor 1501 can read the software program in the memory 1503, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1501 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1501. The processor 1501 converts the baseband signal into data and processes the data.

[0279] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0280] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 140 may take the form of a communication device 1500 as shown in FIG. 15 .

[0281] As an example, the functions / implementation processes of the processing module 1401 and the functions / implementation processes of the transceiver module 1402 in FIG14 may be implemented by the processor 1501 in the communication device 1500 shown in FIG15 calling computer execution instructions.

[0282] As another example, the functions / implementation process of the processing module 1401 in FIG14 can be implemented by the processor 1501 in the communication device 1500 shown in FIG15 calling the computer-executable instructions stored in the memory 1503. The functions / implementation process of the transceiver module 1402 in FIG14 can be implemented by the transceiver 1502 in the communication device 1500 shown in FIG15.

[0283] As another possible product form, the network device or first terminal device in this application may adopt the structure shown in Figure 16, or include the components shown in Figure 16. Figure 16 is a schematic diagram of the composition of a communication device 1600 provided in this application. The communication device 1600 may be a first terminal device or a chip or system-on-chip in the first terminal device; or it may be a network device or a module, chip, or system-on-chip in the network device.

[0284] As shown in FIG16 , the communication device 1600 includes at least one processor 1601 and at least one communication interface ( FIG16 is merely an example of one communication interface 1604 and one processor 1601). Optionally, the communication device 1600 may further include a communication bus 1602 and a memory 1603.

[0285] Processor 1601 can be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 1601 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0286] Communication bus 1602 is used to connect the various components in communication device 1600, enabling communication between them. Communication bus 1602 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, for example. This bus can be categorized as an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG16 shows only one thick line, but this does not imply that there is only one bus or only one type of bus.

[0287] Communication interface 1604 is used to communicate with other devices or communication networks. Exemplarily, communication interface 1604 can be a module, circuit, transceiver, or any other device capable of communication. Optionally, communication interface 1604 can also be an input / output interface within processor 1601, used to implement signal input and output to the processor.

[0288] The memory 1603 may be a device with a storage function, used to store instructions and / or data, wherein the instructions may be computer programs.

[0289] Exemplarily, the memory 1603 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0290] It should be noted that the memory 1603 can exist independently of the processor 1601 or can be integrated with the processor 1601. The memory 1603 can be located within the communication device 1600 or outside the communication device 1600, without limitation. The processor 1601 can be used to execute instructions stored in the memory 1603 to implement the methods provided in the following embodiments of the present application.

[0291] As an optional implementation, the communication device 1600 may further include an output device 1605 and an input device 1606. The output device 1605 communicates with the processor 1601 and can display information in a variety of ways. For example, the output device 1605 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 1606 communicates with the processor 1601 and can receive user input in a variety of ways. For example, the input device 1606 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0292] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the communication device 140 shown in FIG. 14 may take the form of the communication device 1600 shown in FIG. 16 .

[0293] As an example, the functions / implementation process of the processing module 1401 in FIG14 can be implemented by the processor 1601 in the communication device 1600 shown in FIG16 calling the computer-executable instructions stored in the memory 1603. The functions / implementation process of the transceiver module 1402 in FIG14 can be implemented by the communication interface 1604 in the communication device 1600 shown in FIG16.

[0294] It should be noted that the structure shown in FIG16 does not constitute a specific limitation on the network device or the first terminal device. For example, in other embodiments of the present application, the network device or the first terminal device may include more or fewer components than shown, or may combine or separate certain components, or may have different component arrangements. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0295] In some embodiments, an embodiment of the present application further provides a communication device, which includes a processor for implementing the method in any of the above method embodiments.

[0296] As a possible implementation, the communication device further includes a memory. The memory is used to store necessary computer programs and data. The computer program may include instructions, and the processor may invoke the instructions in the computer program stored in the memory to instruct the communication device to execute any of the above-described method embodiments. Of course, the memory may not be located in the communication device.

[0297] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, and the interface circuit is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.

[0298] As another possible implementation, the communication device further includes a communication interface, where the communication interface is used to communicate with a module outside the communication device.

[0299] It can be understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or include chips and other discrete devices. The embodiments of the present application do not specifically limit this.

[0300] The present application also provides a computer-readable storage medium having a computer program or instruction stored thereon, which implements the functions of any of the above method embodiments when executed by a computer.

[0301] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0302] Those skilled in the art will appreciate that, for the sake of convenience and brevity of description, the specific working processes of the above-described systems, devices, and units may refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0303] It is understood that the systems, devices, and methods described in this application may also be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of devices or units, and may be electrical, mechanical, or other forms.

[0304] The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Components shown as units may or may not be physical units. Some or all of these units may be selected to achieve the objectives of this embodiment as needed.

[0305] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0306] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state drive (SSD)). In the embodiment of the present application, the computer may include the aforementioned device.

[0307] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and implement other changes to the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0308] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A method for sending information, characterized in that: Applied to a first terminal device, the method includes: Receiving a first synchronization signal / physical broadcast channel block SSB; According to the first SSB, a first message is sent, wherein the first message is used to indicate the wave position information of the wave position where the first terminal device is located.

2. The method according to claim 1, characterized in that The first message includes an identifier of the wave position.

3. The method according to claim 1, characterized in that The first message includes an index of a first radio frame, wherein the index of the first radio frame is used to indicate the wave position, and the first SSB is located in the first radio frame.

4. The method according to claim 1, characterized in that: The first message includes an index of a second radio frame and first indication information, wherein the index of the second radio frame and the first indication information are used to indicate the wave position, the first indication information is used to indicate a first group of subframes, the first SSB is located in the second radio frame, and the first SSB is located in the first group of subframes.

5. The method according to claim 1, characterized in that The method further comprises: A first broadcast message is received, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes the first SSB.

6. The method according to claim 5, characterized in that The first broadcast message includes the index of the first SSB group, and accordingly, the first message includes the index of the first SSB group.

7. The method according to claim 5, characterized in that The first broadcast message includes information of the first position, and accordingly, the first message includes information of the first position, where the first position is the position where the network device sends the first SSB group.

8. The method according to claim 5, characterized in that The first broadcast message includes a first time, and correspondingly, the first message includes the first time, which is the time when the network device sends the first SSB group.

9. The method according to any one of claims 1 to 8, characterized in that: The sending of the first message comprises: The first message is sent on a first time-frequency resource.

10. The method according to claim 9, characterized in that The first time-frequency resource indicates an index of the first SSB, and the first message is also used for random access and radio resource control RRC to establish a connection; The method further comprises: A second message is received, where the second message is used to respond to the random access and the RRC connection establishment.

11. The method according to claim 9, characterized in that The method further comprises: Sending a third message on a second time-frequency resource, where the third message is used for random access, and the second time-frequency resource indicates an index of the first SSB; A fourth message is received, where the fourth message is used to indicate the first time-frequency resource, and the fourth message is also used to respond to the random access.

12. The method according to claim 11, characterized in that The first message is also used to establish an RRC connection. The method further includes: A fifth message is received, where the fifth message is used to respond to the RRC connection establishment.

13. A method for receiving information, characterized in that: Applied to a network device, the method comprises: Sending a first synchronization signal / physical broadcast channel block SSB; A first message is received, where the first message is used to indicate the wave position information of the wave position where the first terminal device is located.

14. The method according to claim 13, characterized in that The first message includes an identifier of the wave position.

15. The method according to claim 13, characterized in that The first message includes an index of a first radio frame, wherein the index of the first radio frame is used to indicate the wave position, and the first SSB is located in the first radio frame.

16. The method according to claim 13, characterized in that The first message includes an index of a second radio frame and first indication information, wherein the index of the second radio frame and the first indication information are used to indicate the wave position, the first indication information is used to indicate a first group of subframes, the first SSB is located in the second radio frame, and the first SSB is located in the first group of subframes.

17. The method according to claim 13, characterized in that The method further comprises: A first broadcast message is sent, wherein the first broadcast message is used to indicate a first SSB group, and the first SSB group includes the first SSB.

18. The method according to claim 17, characterized in that The first broadcast message includes the index of the first SSB group, and accordingly, the first message includes the index of the first SSB group.

19. The method according to claim 17, characterized in that The first broadcast message includes information of the first position, and accordingly, the first message includes information of the first position, where the first position is the position where the network device sends the first SSB group.

20. The method according to claim 17, characterized in that The first broadcast message includes a first time, and correspondingly, the first message includes the first time, which is the time when the network device sends the first SSB group.

21. The method according to any one of claims 13 to 20, characterized in that: The receiving a first message comprises: The first message is received on a first time-frequency resource.

22. The method according to claim 21, characterized in that The first time-frequency resource indicates an index of the first SSB, and the first message is also used for random access and radio resource control RRC connection establishment; The method further comprises: Send a second message, where the second message is used to respond to the random access and the RRC connection establishment.

23. The method according to claim 21, characterized in that The method further comprises: receiving a third message on a second time-frequency resource, where the third message is used for random access, and the second time-frequency resource indicates an index of the first SSB; A fourth message is sent, where the fourth message is used to indicate the first time-frequency resource, and the fourth message is also used to respond to the random access.

24. The method according to claim 23, characterized in that The first message is also used for RRC connection establishment, and the method further includes: A fifth message is sent, where the fifth message is used to respond to the RRC connection establishment.

25. A communication system, characterized in that: The communication system includes a first terminal device and a network device. The first terminal device is used to execute the method according to any one of claims 1 to 12; The network device is used to execute the method according to any one of claims 13-24.

26. A communication device, characterized in that: The communication device includes a transceiver module and a processing module. The transceiver module is used to perform the receiving behavior or the sending behavior in the method according to any one of claims 1 to 12, or to perform the receiving behavior or the sending behavior in the method according to any one of claims 13 to 24; The processing module is used to execute the processing behavior in the method according to any one of claims 1-12, or to execute the processing behavior in the method according to any one of claims 13-24.

27. A communication device, characterized in that: The communication device comprises a processor; the processor is configured to run a computer program or instruction so that the communication device executes the method according to any one of claims 1 to 12, or so that the communication device executes the method according to any one of claims 13 to 24.

28. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the method according to any one of claims 1 to 12 is executed, or the method according to any one of claims 13 to 24 is executed.

29. A computer program product, characterized in that When the computer program product is executed on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 12, or the communication device is caused to execute the method according to any one of claims 13 to 24.

30. A chip, characterized in that: include: A processor, wherein the processor is coupled to an interface circuit, wherein the interface circuit is used to receive computer execution instructions, and when the execution instructions are executed by the processor, the chip executes the method as described in any one of claims 1-12, or the chip executes the method as described in any one of claims 13-24.

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