Communication method, communication device and computer readable storage medium

Abstract

The invention discloses a communication method, a communication device and a computer readable storage medium, and relates to the technical field of communication. In the scheme of the application, every N continuous radio frames comprise a single activated downlink frame, or every N continuous radio frames comprise M continuous activated downlink frames, the method comprises at least one of the following items: receiving an NPSS in a first radio frame, the first radio frame being an activated downlink frame; receiving the NSSS in a second wireless frame, wherein the second wireless frame is an activated downlink frame; receiving NPBCH transmission at a third wireless frame, wherein the third wireless frame is an activated downlink frame; receiving the SIB1-NB in a fourth wireless frame, wherein the fourth wireless frame is an activated downlink frame; wherein N and M are positive integers larger than 1, and M is smaller than N. According to the scheme provided by the invention, the non-connection sending of the network equipment can be realized in the narrowband Internet of Things system, and the energy conservation of the network is facilitated.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, a communication device, and a computer-readable storage medium. Background Technology

[0002] Narrow Band Internet of Things (NB-IoT) is an important branch of the Internet of Things. Built on cellular networks, NB-IoT can be directly deployed on Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), or Long Term Evolution (LTE) networks to reduce deployment costs and enable smooth upgrades. With the continuous development and application of communication technologies, higher demands are being placed on network energy efficiency. How to further achieve network energy efficiency in NB-IoT systems is one of the urgent problems to be solved in the field of communications. Summary of the Invention

[0003] The technical objective of this application is to provide a communication method, communication device, and computer-readable storage medium that can achieve energy saving on the network side of a narrowband Internet of Things system.

[0004] In a first aspect, embodiments of this application provide a communication method in which every N consecutive radio frames includes one active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames. The method includes: receiving a narrowband primary synchronization signal (NPSS) in a first radio frame, wherein the first radio frame is an active downlink frame; and / or receiving a narrowband secondary synchronization signal (NSSS) in a second radio frame, wherein the second radio frame is an active downlink frame; and / or receiving a narrowband physical broadcast channel (NPBCH) in a third radio frame, wherein the third radio frame is an active downlink frame; and / or receiving a narrowband system information block (SIB1-NB) in a fourth radio frame, wherein the fourth radio frame is an active downlink frame; wherein N and M are both positive integers greater than 1, and M is less than N.

[0005] In the above scheme, the network device only sends at least one of NPSS, NSSS, NPBCH and SIB1-NB on the active downlink frame, realizing the discontinuous transmission of the network device, which is beneficial to energy saving on the network side of the NB-IoT system.

[0006] Optionally, the frame number SFN of the first radio frame satisfies: SFN mod N = 0; or, every N consecutive radio frames include M consecutive active downlink frames, and the frame number SFN of the first radio frame satisfies: SFN mod N = i, where i is an integer, 0 ≤ i ≤ M-1. When the network device only transmits NPSS on active downlink frames, the terminal device can determine the temporal resource location of the NPSS using the above scheme.

[0007] Optionally, the frame number SFN of the second radio frame satisfies: SFN mod N = 0. When the network device only transmits NSSS on active downlink frames, the terminal device can determine the temporal resource location of the NSSS using the above scheme.

[0008] Optionally, every N consecutive radio frames includes a single active downlink frame, and the NPBCH transmission satisfies the following conditions: the NPBCH transmission occupies 2 subframes in the third radio frame; and / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; and / or, the NPBCH transmission period is 32 × N radio frames; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod 32 × N = 0; and / or, a single NPBCH transmission period is used to transmit 8 NPBCH blocks, and one third radio frame is used to carry one NPBCH block. When the network device only transmits NPBCH on the active downlink frames, the terminal device can determine the time-domain resources of the NPBCH through the above scheme.

[0009] Optionally, every N consecutive radio frames includes M consecutive active downlink frames, and the NPBCH transmission satisfies the following: the NPBCH transmission occupies Q subframes in the third radio frame, where Q is a positive integer; and / or, the frame number SFN of the third radio frame satisfies: SFN mod j = 0, where j is an integer, 0 ≤ j ≤ L-1; and / or, the NPBCH transmission period is... One radio frame; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: And / or, a single NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block; where L is a positive integer, and 1≤L≤M. With the network device transmitting NPBCH only on active downlink frames, the terminal device can determine the time-domain resources of the NPBCH using the above scheme.

[0010] Optionally, the frame number SFN of the second radio frame satisfies: SFN mod(2×N) = 0. When the network device only transmits NSSS on active downlink frames, the terminal device can determine the temporal resource location of the NSSS using the above scheme.

[0011] Optionally, every N consecutive radio frames includes a single active downlink frame, and the NPBCH transmission satisfies the following conditions: the NPBCH transmission occupies one subframe of the third radio frame; and / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; and / or, the NPBCH transmission period is 64 × N radio frames; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod 64 × N = 0; and / or, a single NPBCH transmission period is used to transmit 8 NPBCH blocks, and one third radio frame is used to carry one NPBCH block. When the network device only transmits NPBCH on active downlink frames, the terminal device can determine the time-domain resources of the NPBCH through the above scheme.

[0012] Optionally, the SIB1-NB occupies X subframes in the fourth radio frame, where X is a positive integer.

[0013] Optionally, X is a positive integer greater than 1. Compared to the SIB1-NB using a subframe within a radio frame, this scheme requires less transmission time for SIB1-NB, which is beneficial for terminal devices to achieve synchronization as quickly as possible.

[0014] Optionally, the SIB1-NB satisfies the following: the SIB1-NB transmission period is: One wireless frame; and / or, within a single SIB1-NB transmission cycle, the SIB1-NB is repeatedly transmitted multiple times, each transmission occupying [time period]. One radio frame; and / or, the frame number of the starting radio frame of the SIB1-NB transmission cycle satisfies: Wherein, Y depends on the number of repeated transmissions of the SIB1-NB and the cell identifier of the current cell; where K is a positive integer and 1≤K≤M.

[0015] Secondly, embodiments of this application provide a communication method in which every N consecutive radio frames includes one active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames. The method includes at least one of the following: transmitting a narrowband primary synchronization signal (NPSS) in a first radio frame, wherein the first radio frame is an active downlink frame; transmitting a narrowband secondary synchronization signal (NSSS) in a second radio frame, wherein the second radio frame is an active downlink frame; transmitting a narrowband physical broadcast channel (NPBCH) in a third radio frame, wherein the third radio frame is an active downlink frame; and transmitting a narrowband system information block (SIB1-NB) in a fourth radio frame, wherein the fourth radio frame is an active downlink frame; wherein N and M are both positive integers greater than 1, and M is less than N.

[0016] Optionally, the frame number SFN of the first radio frame satisfies: SFN mod N = 0; or, every N consecutive radio frames includes M consecutive active downlink frames, and the frame number SFN of the first radio frame satisfies: SFN mod N = i, where i is an integer, 0 ≤ i ≤ M-1.

[0017] Optionally, the frame number SFN of the second wireless frame satisfies: SFN mod N = 0.

[0018] Optionally, every N consecutive radio frames includes a single active downlink frame, and the NPBCH transmission satisfies the following: the NPBCH transmission occupies 2 subframes in the third radio frame; and / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; and / or, the NPBCH transmission period is 32 × N radio frames; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod 32 × N = 0; and / or, a single NPBCH transmission period is used to transmit 8 NPBCH blocks, and one third radio frame is used to carry one NPBCH block.

[0019] Optionally, every N consecutive radio frames includes M consecutive active downlink frames, and the NPBCH transmission satisfies the following: the NPBCH transmission occupies Q subframes in the third radio frame, where Q is a positive integer; and / or, the frame number SFN of the third radio frame satisfies: SFN mod j = 0, where j is an integer, 0 ≤ j ≤ L-1; and / or, the NPBCH transmission period is... One radio frame; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: And / or, a single NPBCH transmission period is used to transmit 8 NPBCH blocks, and a third radio frame is used to carry one NPBCH block; where L is a positive integer and 1≤L≤M.

[0020] Optionally, the frame number SFN of the second wireless frame satisfies: SFN mod(2×N)=0.

[0021] Optionally, every N consecutive radio frames includes a single active downlink frame, and the NPBCH transmission satisfies the following: the NPBCH transmission occupies one subframe of the third radio frame; and / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; and / or, the NPBCH transmission period is 64 × N radio frames; and / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod 64 × N = 0; and / or, a single NPBCH transmission period is used to transmit 8 NPBCH blocks, and one third radio frame is used to carry one NPBCH block.

[0022] Optionally, the SIB1-NB occupies X subframes in the fourth radio frame, where X is a positive integer.

[0023] Optional, X is a positive integer greater than 1.

[0024] Optionally, the SIB1-NB satisfies the following: the SIB1-NB transmission period is: One wireless frame; and / or, within a single SIB1-NB transmission cycle, the SIB1-NB is repeatedly transmitted multiple times, each transmission occupying [time period]. One radio frame; and / or, the frame number of the starting radio frame of the SIB1-NB transmission cycle satisfies: SFN mod Wherein, Y depends on the number of repeated transmissions of the SIB1-NB and the cell identifier of the current cell; where K is a positive integer and 1≤K≤M.

[0025] Thirdly, embodiments of this application also provide a communication device, wherein every N consecutive radio frames includes one active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames. The device includes: a communication module configured to perform the following steps: receiving a narrowband primary synchronization signal NPSS in a first radio frame, wherein the first radio frame is an active downlink frame; and / or receiving a narrowband secondary synchronization signal NSSS in a second radio frame, wherein the second radio frame is an active downlink frame; and / or receiving narrowband physical broadcast channel NPBCH transmission in a third radio frame, wherein the third radio frame is an active downlink frame; and / or receiving a narrowband system information block SIB1-NB in ​​a fourth radio frame, wherein the fourth radio frame is an active downlink frame; wherein N and M are both positive integers greater than 1, and M is less than N.

[0026] Fourthly, embodiments of this application also provide a communication device, wherein every N consecutive radio frames includes one active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames. The device includes: a communication module configured to perform the following steps: transmitting a narrowband primary synchronization signal (NPSS) in a first radio frame, wherein the first radio frame is an active downlink frame; and / or transmitting a narrowband secondary synchronization signal (NSSS) in a second radio frame, wherein the second radio frame is an active downlink frame; and / or transmitting a narrowband physical broadcast channel (NPBCH) transmission in a third radio frame, wherein the third radio frame is an active downlink frame; and / or transmitting a narrowband system information block (SIB1-NB) in a fourth radio frame, wherein the fourth radio frame is an active downlink frame; wherein N and M are both positive integers greater than 1, and M is less than N.

[0027] Fifthly, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when run by a computer, performs the steps of the communication method provided in the first or second aspect.

[0028] In a sixth aspect, embodiments of this application also provide a communication device, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the communication method provided in the first aspect when running the computer program.

[0029] In a seventh aspect, embodiments of this application also provide a communication device, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the communication method provided in the second aspect above when running the computer program.

[0030] Eighthly, embodiments of this application provide a chip (or communication device) storing a computer program, which, when executed by the chip, causes the methods provided in the first or second aspect to be performed.

[0031] Ninthly, embodiments of this application provide a chip module on which a computer program is stored, such that when the computer program is executed by the chip module, the methods provided in the first or second aspect are executed.

[0032] In a tenth aspect, embodiments of this application provide a computer program product, the computer program product including a computer program that, when run on a computer, causes the computer to perform the methods provided in the first or second aspect described above.

[0033] Eleventhly, embodiments of this application provide a communication system, the communication system including means for performing the communication method provided in the first aspect and means for performing the communication method provided in the second aspect. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a wireless frame in an NB-IoT system;

[0035] Figure 2 This is a schematic diagram of the signaling interaction of the first communication method in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the time-domain resources of the first type of NPSS and NSSS in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the time-domain resources of the first type of NPBCH in the embodiments of this application;

[0038] Figure 5 This is a schematic diagram of the time-domain resources of the first type of SIB1-NB in ​​the embodiments of this application;

[0039] Figure 6 This is a signaling interaction diagram of the second communication method in the embodiments of this application;

[0040] Figure 7 This is a temporal resource diagram of the second type of NPSS and NSSS in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the time-domain resources of the second type of NPBCH in the embodiments of this application;

[0042] Figure 9 This is a signaling interaction diagram of the third communication method in the embodiments of this application;

[0043] Figure 10 This is a schematic diagram of the time-domain resources of the third type of NPSS and NSSS in the embodiments of this application;

[0044] Figure 11 This is a schematic diagram of the time-domain resources of the third type of NPBCH in the embodiments of this application;

[0045] Figure 12 This is a time-domain resource diagram of the second type of SIB1-NB in ​​the embodiments of this application;

[0046] Figure 13 This is a schematic diagram of the time-domain resources of the third type of SIB1-NB in ​​the embodiments of this application;

[0047] Figure 14 This is a signaling interaction diagram of the fourth communication method in the embodiments of this application;

[0048] Figure 15 This is a schematic diagram of the time-domain resources of the fourth type of NPBCH in the embodiments of this application;

[0049] Figure 16 This is a signaling interaction diagram of the fifth communication method in the embodiments of this application;

[0050] Figure 17 This is a schematic diagram of the time-domain resources of the fifth type of NPBCH in the embodiments of this application;

[0051] Figure 18 This is a schematic diagram of the time-domain resources of the sixth type of NPBCH in the embodiments of this application;

[0052] Figure 19 This is a signaling interaction diagram of the sixth communication method in the embodiments of this application;

[0053] Figure 20 This is a schematic diagram of the time-domain resources of the fourth type of NPSS and NSSS in the embodiments of this application;

[0054] Figure 21 This is a schematic diagram of the time-domain resources of the seventh type of NPBCH in the embodiments of this application;

[0055] Figure 22 This is a flowchart illustrating the seventh communication method in the embodiments of this application;

[0056] Figure 23 This is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0057] Figure 24 This is a schematic diagram of the structure of another communication device in the embodiments of this application;

[0058] Figure 25 This is a schematic diagram of the hardware architecture of a communication device according to an embodiment of this application. Detailed Implementation

[0059] The communication systems applicable to the embodiments of this application include, but are not limited to, long-term evolution (LTE) systems, 5th-generation (5G) systems (such as New Radio (NR) systems), and future evolution systems or multiple converged communication systems. The 5G system can be a non-standalone (NSA) 5G system or a standalone (SA) 5G system. The solutions of the embodiments of this application can also be applied to future new communication systems, such as 6th-generation (6G) communication systems.

[0060] This application primarily relates to communication between terminal devices and network devices. The network device can be a network device in non-terrestrial network (NTN) communication or a network device in a terrestrial network communication system.

[0061] In this application, "terminal equipment" can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device, etc. For example, terminal equipment can be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal in a future 5G network, or terminal equipment in a future evolved Public Land Mobile Network (PLMN), etc. This application does not limit the scope of the term. In some embodiments of this application, the terminal equipment can be an electronic device with wireless data transmission capabilities. In other embodiments of this application, the terminal equipment can also be a device with transceiver capabilities, such as a chip system. The chip system can include chips and other discrete components.

[0062] The network device in this application embodiment can refer to a device that provides wireless communication functions for terminal devices. The network device can be called an access network device, such as a radio access network (RAN) device or an access network element. The network device can support at least one wireless communication technology, such as LTE or NR. For example, the network device can be a base station (BS) (also called base station equipment), a base transceiver station (BTS), a Node B, an evolved Node B (eNB), or a device that provides base station functions in a 5G network, such as a next-generation node B (gNB) and a further evolved Node B (ng-eNB). The gNB communicates with the terminal device using NR technology, while the ng-eNB communicates with the terminal device using Evolved Universal Terrestrial Radio Access (E-UTRA) technology. Both the gNB and ng-eNB can connect to the 5G core network. In wireless local area networks (WLANs), the device that provides base station functionality is called an access point (AP). The network device in this application embodiment also includes devices that provide wireless communication functionality in future new communication systems. In some embodiments, the network device may also be a means of providing wireless communication functionality for terminal devices, such as a chip system. For example, a chip system may include a chip, and may also include other discrete devices.

[0063] In some embodiments, network equipment may refer to a centralized unit (CU) of a base station, or a distributed unit (DU) of a base station, or a CU control plane (CU-CP) of a base station, or a DU user plane (CU-up) of a base station, etc.

[0064] It should be understood that the "and / or" appearing in the embodiments of this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document indicates that the related objects before and after it have an "or" relationship.

[0065] In this application's embodiments, "at least one" refers to one or more. In this application's embodiments, "multiple" refers to two or more.

[0066] The descriptions of "first," "second," etc., appearing in the embodiments of this application are for illustrative purposes and to distinguish the objects being described. They have no order and do not indicate any special limitation on the number of devices in the embodiments of this application, nor do they constitute any limitation on the embodiments of this application.

[0067] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a wireless frame in an NB-IoT system.

[0068] like Figure 1 As shown, in the NB-IoT system, the duration of a wireless frame is 10 milliseconds (ms). For a wireless frame, if the wireless frame is used for downlink transmission, then the wireless frame is a downlink frame; if the wireless frame is used for uplink transmission, then the wireless frame is an uplink frame.

[0069] In practice, each radio frame has a radio frame number, which is the system frame number (SFN).

[0070] Furthermore, a radio frame comprises 10 subframes, namely subframe 0, subframe 1, subframe 2, subframe 3, subframe 4, subframe 5, subframe 6, subframe 7, subframe 8, and subframe 9. Each subframe has a duration of 1 ms. For a given subframe, if it is used for downlink transmission, it is a downlink subframe. If it is used for uplink transmission, it is an uplink subframe.

[0071] In NB-IoT systems, network devices broadcast synchronization signals to enable terminal devices to perform cell searches. The synchronization signals in NB-IoT systems include the Narrowband Primary Synchronization Signal (NPSS) and the Narrowband Primary Synchronization Signal (NSSS). Terminal devices can use the NPSS and NSSS for time and frequency synchronization, among other things.

[0072] After synchronization is achieved, the terminal device can receive the Narrowband Physical Broadcast Channel (NPBCH), which carries the Master Information Block (MIB). The MIB includes scheduling information for Narrowband System Information Block 1 (SIB1-NB). The SIB1-NB scheduling information is used to schedule the SIB1-NB. After decoding the NPBCH, the terminal device can receive the SIB1-NB based on its scheduling information.

[0073] To reduce the power consumption of network devices in NB-IoT systems, this application provides a method for discontinuous transmission in the time domain. In this embodiment, every N radio frames includes a single active downlink frame, or every N radio frames includes M consecutive active downlink frames, where M is a positive integer greater than 1. The network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on active downlink frames, and does not transmit channels or signals on inactive downlink frames. This achieves discontinuous transmission by the network device, which is beneficial for energy saving on the network side of the NB-IoT system.

[0074] In this document, a downlink frame can refer to a radio frame used to carry downlink channels or downlink signals. In the scheme of this application embodiment, the network device only transmits channels or signals on active downlink frames, and correspondingly, the terminal device only receives channels or signals on active downlink frames.

[0075] In one possible implementation, an active downlink frame can have all its subframes active. That is, the network device can transmit signals or channels on all subframes of the active downlink frame. Correspondingly, the terminal device can receive signals or channels on all subframes of the active downlink frame.

[0076] In another possible implementation, a portion of the subframes in an active downlink frame are active, while another portion are inactive. That is, the network device transmits signals or channels on the active subframes, and neither transmits signals nor channels on the inactive subframes. Correspondingly, the terminal device receives signals or channels on the active subframes, and neither receives signals nor channels on the inactive subframes. In another possible implementation, a portion of consecutive subframes in an active downlink frame are active.

[0077] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. In the following embodiments, the actions performed by the network device can be performed by the network device, devices within the network device (e.g., processors, chips), chips, etc., and the actions performed by the terminal device can be performed by the terminal device, devices within the terminal device (e.g., processors, chips), chips, etc., and this application does not impose any limitations. For ease of description, the embodiments provided in this application will be illustrated using network devices and terminal devices as examples of the executing entities.

[0078] Example 1

[0079] In the scheme of Embodiment 1, every N consecutive radio frames includes a single active downlink frame. Specifically, in N consecutive radio frames, the network device transmits signals or channels only on the active downlink frame. N consecutive radio frames can be understood as an active downlink frame period, which may include at least one active downlink frame. Specifically, an active downlink frame period may include one active downlink frame, or a period including M consecutive active downlink frames. N in this document is a positive integer greater than 1.

[0080] It should be noted that the value of N can be defined by the protocol. Alternatively, the value of N can be configured by the network device; for example, the network device can configure the activation downlink frame period for each carrier separately. That is, the network device can configure the value of N for each carrier individually. The value of N can be the same or different for different carriers.

[0081] Reference Figure 2 , Figure 2 This is a schematic diagram of the signaling interaction of the first communication method in the embodiments of this application, as shown below. Figure 2 As shown, Figure 2 The method shown may include at least one of S21, S22, S23, and S24. This document does not restrict the execution order of S21, S22, S23, and S24.

[0082] S21, the network device transmits the NPSS on the first radio frame, and the frame number of the first radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives the NPSS on the first radio frame.

[0083] The first radio frame in this article refers to the radio frame carrying NPSS. In the scheme of Embodiment 1, the frame number of the first radio frame satisfies equation (1):

[0084] SFN1 mod N=0 Equation (1)

[0085] Here, SFN1 represents the frame number of the first radio frame, and mod represents the modulo operation. That is to say, the first radio frame can be the first radio frame among N radio frames.

[0086] In one possible implementation, the NPSS may occupy a single subframe in the first radio frame. For example, the NPSS may occupy subframe 5 in the first radio frame.

[0087] In practice, the terminal device receives the NPSS on the first radio frame. Based on the received NPSS, the terminal device can determine the frame boundary information of radio frames whose SFN satisfies: SFN mode N=0. It should be noted that the frame boundary information in this article can refer to the start and / or end positions of the frame.

[0088] S22, the network device transmits NSSS on the second radio frame, wherein the frame number of the second radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives NSSS on the second radio frame.

[0089] The second radio frame in this article refers to the radio frame carrying NSSS. In the scheme of Embodiment 1, the frame number of the second radio frame satisfies equation (2):

[0090] SFN2 mod N=0 Equation (2)

[0091] Here, SFN2 represents the frame number of the second radio frame, and mod represents the modulo operation. In other words, the second radio frame can be the first radio frame out of N radio frames.

[0092] In one possible implementation, the NSSS may occupy a single subframe within the second radio frame. For example, the NSSS may occupy subframe 9 within the second radio frame.

[0093] In practical implementation, each transmitted NSSS can apply one of four time-domain cyclic shifts. For example, the values ​​of the four time-domain cyclic shifts can be {0, 33, 66, 99}. More specifically, each transmitted NSSS applies the (SFN2 mod (4N))th time-domain cyclic shift value, where SFN2 represents the frame number of the second radio frame. Therefore, after receiving the NSSS on the second radio frame, the terminal device can determine the frame boundary information of the radio frame whose SFN satisfies SFN mode (4N) = 0 based on the received NSSS. (See reference...) Figure 3 , Figure 3 This is a schematic diagram of the time-domain resources of the first type of NPSS and NSSS in the embodiments of this application. Figure 3 In the illustrated scheme, N=4, and only one radio frame is active in every four consecutive radio frames. Figure 3Taking the radio frames numbered 4, 5, 6, and 7 as examples, frame number 4 is the active downlink frame. Similarly, in the radio frames numbered 8, 9, 10, and 11, frame number 8 is the active downlink frame. And in the radio frames numbered 12, 13, 14, and 15, frame number 12 is the active downlink frame. In these four consecutive radio frames, the network device only transmits NPSS and NSSS on the active radio frame. Figure 3 As shown, the network device transmits NPSS and NSSS on radio frames with frame numbers 4, 8, 12, and 16, respectively, while not transmitting channels or signals on radio frames with frame numbers 5, 6, 7, 9, 10, 11, 13, 14, and 15. For example, the network device transmits NPSS on subframe 5 of radio frame number 4 and NSSS on subframe 9.

[0094] Continue to refer to Figure 2 , Figure 2 The method shown may also include: S23.

[0095] S23, the network device transmits the NPBCH on the third radio frame. The NPBCH occupies two subframes of the third radio frame, and the frame number SFN of the third radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0096] It should be noted that when a terminal device receives NPBCH, it means that the terminal device receives the modulation symbols transmitted on the NPBCH and decodes the received modulation symbols to obtain the information carried on the NPBCH.

[0097] The third radio frame in this article refers to the radio frame carrying the NPBCH. In the scheme of Embodiment 1, the frame number of the third radio frame satisfies equation (3):

[0098] SFN3 mod N=0 Equation (3)

[0099] Here, SFN3 represents the frame number of the third radio frame, and mod represents the modulo operation. That is to say, the third radio frame can be the first radio frame in a set of N radio frames.

[0100] In this embodiment, the NPBCH occupies two subframes in the third radio frame.

[0101] In one possible implementation, one of the two subframes occupied by NPBCH in the third radio frame can be subframe 0, and the other subframe can be one of subframes 1 to 9.

[0102] In practical implementation, the network device transmits 8 NPBCH blocks in one NPBCH transmission cycle, where each NPBCH block is transmitted 8 times within one NPBCH transmission cycle. That is, one NPBCH transmission cycle requires 8 repetitions of 8 NPBCH blocks. Each transmission of each NPBCH block occupies one subframe; therefore, each NPBCH block occupies 8 active downlink subframes. In this embodiment, one third radio frame carries one NPBCH block, and within one third radio frame, the NPBCH occupies 2 subframes. That is, 2 subframes on the same third radio frame can carry 2 repetitions of one NPBCH block. Thus, each NPBCH block occupies 4 third radio frames, thereby completing 8 repetitions of the NPBCH block. In other words, each NPBCH block occupies active downlink frames in 4×N consecutive radio frames, and the NPBCH transmission cycle is 32×N radio frames.

[0103] Among them, the frame number of the starting radio frame of the NPBCH transmission period satisfies equation (4):

[0104] SFN_st1 mod (32×N)=0 Equation (4)

[0105] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation. The starting radio frame of the NPBCH transmission cycle refers to the radio frame containing the first transmission of the first NPBCH block in an NPBCH transmission cycle.

[0106] It should be noted that "×" in this article means "multiplied".

[0107] For example, N = 4, 32 × 4 = 128, that is, the NPBCH transmission period is 128 radio frames, and the starting radio frame of the NPBCH transmission period is the radio frame whose SFN satisfies: SFN mod 128 = 0.

[0108] Reference Figure 4 , Figure 4 This is a schematic diagram of the time-domain resources of the first type of NPBCH in the embodiments of this application. Figure 4 In the illustrated scheme, N=4, and only one radio frame is active in every four consecutive radio frames. For example... Figure 4 As shown, radio frames with frame numbers 128, 132, 136, 140, 144, 148, 152, and 156 are third radio frames, and each third radio frame contains two subframes used to carry the NPBCH. That is, a third radio frame can include two active subframes. Figure 4As shown, subframes 0 and 1 are used to carry NPBCH. In practice, one NPBCH transmission cycle requires the transmission of 8 NPBCH blocks (referred to as "blocks" in the diagram), where each NPBCH block occupies 100 resource elements (REs) on a subframe. Figure 4 For example, the radio frame with frame number 128 is the starting radio frame of the NPBCH transmission cycle. Radio frames with frame numbers 128, 132, 136 and 140 are used to repeat block 0, and radio frames with frame numbers 144, 148, 152 and 156 are used to repeat block 1.

[0109] Continue to refer to Figure 2 , Figure 2 The method shown may also include S24.

[0110] S24, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0111] In this document, the "fourth radio frame" refers to the radio frame carrying the SIB1-NB. The fourth radio frame is the active downlink frame. In specific implementations, the SIB1-NB can occupy X subframes within the fourth radio frame. X is a positive integer, and 1 ≤ X ≤ 10.

[0112] In one possible implementation, X = 1. For example, SIB1-NB occupies subframe 4 in the fourth radio frame.

[0113] In another possible implementation, X > 1. For example, X = 2, or X = 3, or X = 4, etc., but not limited to these. For example, if X = 2, the SIB1-NB occupies subframes 3 and 4 in the fourth radio frame. Compared to the scheme where X = 1, the scheme where the SIB1-NB occupies multiple subframes in the fourth radio frame has a shorter SIB1-NB cycle, allowing the terminal device to complete the reception and decoding of the SIB1-NB as quickly as possible, achieving synchronization with the network device.

[0114] In practice, the SIB1-NB transmission period can be One wireless frame, that is, the transmission period of SIB1-NB can be ms. Within a single SIB1-NB transmission cycle, the SIB1-NB is transmitted multiple times. The number of times the SIB1-NB is transmitted within a single SIB1-NB transmission cycle can be indicated by the network device. For example, the MIB can indicate the number of times the SIB1-NB is transmitted.

[0115] One transmission of SIB1-NB requires 8 active subframes; therefore, one transmission of SIB1-NB occupies [a certain amount of time / time]. One active radio frame. That is, one transmission of SIB1-NB occupies a continuous [number] radio frames. The fourth radio frame in a series of radio frames.

[0116] Among them, the frame number of the starting radio frame of the SIB1-NB transmission period satisfies equation (5):

[0117]

[0118] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle, which is the first radio frame occupied by the first transmission of SIB1-NB in ​​a SIB1-NB transmission cycle. Y in equation (5) depends on the number of repeated transmissions of SIB1-NB and the cell identifier of the current cell. Wherein, the current cell refers to the cell that sent the SIB1-NB.

[0119] In one example, N=4, X=2, The value is 4 / 2 × 256 = 512. That is, the SIB1-NB transmission period can be 512 radio frames. One transmission of SIB1-NB occupies 4 active radio frames. The SFN of the starting radio frame of the SIB1-NB transmission period satisfies: SFN_st2 mod 512 = Y.

[0120] For example, the value of Y can be determined based on Table 1.

[0121] Table 1

[0122]

[0123] In one example, N is even and X = 2, and a single transmission of SIB1-NB occupies 4 active downlink frames. That is, a single transmission of SIB1-NB occupies 4 × N consecutive active downlink frames. The SIB1-NB transmission period is 128 × N radio frames, and the frame number of the starting radio frame of the SIB1-NB transmission period satisfies equation (6):

[0124] SFN_st2 mod (128×N)=Y Formula (6)

[0125] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle, mod represents the modulo operation, and the value of Y can be determined based on Table 2.

[0126] Table 2

[0127]

[0128] In a specific example, the MIB indicates that the number of retransmissions for SIB1-NB is 4, and the current cell identifier N cell-ID The value of is 8, and according to Table 2, the value of Y is 0.

[0129] Reference Figure 5 , Figure 5 This is a schematic diagram of the time-domain resources of the first type of SIB1-NB in ​​the embodiments of this application. Figure 5 In the illustrated scheme, N=4, X=2, and only one active radio frame exists in every four consecutive radio frames. The SIB1-NB occupies two subframes within an active radio frame. The SIB1-NB transmission cycle is 512 radio frames, and within one SIB1-NB transmission cycle, the SIB1-NB repeats the transmission four times. Figure 5 The starting radio frame of the SIB1-NB transmission cycle shown is frame number 512. The network device performs the first transmission of SIB1-NB in ​​this transmission cycle on radio frames with frame numbers 512, 516, 520 and 524.

[0130] Therefore, in the scheme of Embodiment 1, every N consecutive radio frames includes a single active downlink frame, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frame. Specifically, in an active downlink frame, NPBCH occupies two subframes, and SIB1-NB occupies at least one subframe.

[0131] For more details on Embodiment 1, please refer to the relevant descriptions of other embodiments in this document, which will not be repeated here.

[0132] Example 2

[0133] In the scheme of Embodiment 2, every N consecutive radio frames includes a single active downlink frame. Specifically, in the N consecutive radio frames, the network device transmits signals or channels only on the active downlink frame.

[0134] Reference Figure 6 , Figure 6 This is a signaling interaction diagram of the second communication method in the embodiments of this application, as shown below. Figure 6 As shown, Figure 6 The method shown may include at least one of S61, S62, S63, and S64. This document does not restrict the execution order of S61, S62, S63, and S64.

[0135] S61, the network device transmits NPSS on the first radio frame, where the first radio frame is an active downlink frame, and the frame number of the first radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives NPSS on the first radio frame.

[0136] For details regarding S61, please refer to the above description of S21; it will not be repeated here.

[0137] S62, the network device sends an NSSS on the second radio frame, where the frame number of the second radio frame satisfies: SFN mod(2×N)=0. Correspondingly, the terminal device receives the NSSS on the second radio frame.

[0138] Unlike Embodiment 1, in Embodiment 2, the frame number of the second wireless frame satisfies equation (7):

[0139] SFN2 mod (2×N)=0 Equation (7)

[0140] Where SFN2 represents the frame number of the second radio frame, and mod represents the modulo operation. In other words, the second radio frame can be the first radio frame among (2×N) radio frames. That is, in the scheme of Embodiment 2, among two adjacent active radio frames, only one active radio frame carries NSSS, and the other active radio frame does not transmit NSSS. For example, if N=4 and 2×N=9, then the frame number of the second radio frame satisfies SFN mod 8=0.

[0141] In one possible implementation, the NSSS may occupy a single subframe within the second radio frame. For example, the NSSS may occupy subframe 9 within the second radio frame.

[0142] In practice, each transmitted NSSS can apply one of four time-domain cyclic shifts. For example, the values ​​of the four time-domain cyclic shifts can be {0, 33, 66, 99}. More specifically, each transmitted NSSS can apply the (SFN2 mod (8×N))th time-domain cyclic shift value, where SFN2 represents the frame number of the second radio frame. Thus, the terminal device receives the NSSS on the second radio frame. Based on the received NSSS, the terminal device can determine the frame boundary information of radio frames where SFN satisfies: SFN mode (8×N) = 0.

[0143] Reference Figure 7 , Figure 7 This is a schematic diagram of the time-domain resources of the second type of NPSS and NSSS in the embodiments of this application. Figure 7 In the illustrated scheme, N=4, and only one downlink frame is active in every four consecutive radio frames. Figure 7Taking the radio frames numbered 4, 5, 6, and 7 as examples, frame number 4 is the active downlink frame. Similarly, in the radio frames numbered 8, 9, 10, and 11, frame number 8 is the active downlink frame. And in the radio frames numbered 12, 13, 14, and 15, frame number 12 is the active downlink frame. In these four consecutive radio frames, the network device transmits NPSS on the active downlink frame. For example, the network device transmits NPSS on subframe 5 within the active downlink frame. Furthermore, in two adjacent active downlink frames, the network device only transmits NSSS on one of the active downlink frames. Figure 7 As shown, radio frames with frame numbers 4, 8, 12, and 16 are active downlink frames. The network device transmits NPSS on radio frames with frame numbers 4, 8, 12, and 16, and NSSS on radio frames with frame numbers 8 and 16, respectively. However, it does not transmit channels or signals on radio frames with frame numbers 5, 6, 7, 9, 10, 11, 13, 14, and 15, respectively.

[0144] Continue to refer to Figure 6 , Figure 6 The method shown may also include: S63.

[0145] S63, the network device transmits the NPBCH on the third radio frame. The NPBCH occupies one subframe of the third radio frame, and the frame number SFN of the third radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0146] In this embodiment, the frame number of the third wireless frame satisfies equation (3) above.

[0147] In this embodiment, the NPBCH occupies one subframe of the third radio frame. In one possible implementation, the NPBCH occupies subframe 0 of the third radio frame.

[0148] In specific implementation, the network device transmits 8 NPBCH blocks in one NPBCH transmission cycle, where each NPBCH block is transmitted repeatedly 8 times within one NPBCH transmission cycle. That is, one NPBCH transmission cycle requires 8 repeated transmissions of 8 NPBCH blocks. Each transmission of each NPBCH block occupies one subframe; therefore, each NPBCH block occupies 8 active downlink subframes. In this embodiment, the NPBCH occupies 1 subframe in the third radio frame; therefore, each NPBCH block occupies 8 active downlink frames. In this embodiment, one third radio frame carries one NPBCH block, and within one third radio frame, the NPBCH occupies 1 subframe. Thus, each NPBCH block occupies 8 third radio frames, thereby completing 8 repeated transmissions of the NPBCH block. That is, each NPBCH block occupies active downlink frames in 8 consecutive radio frames, and the NPBCH transmission cycle is 64×N radio frames.

[0149] Among them, the frame number of the starting radio frame of the NPBCH transmission period satisfies equation (8):

[0150] SFN_st1 mod (64×N)=0 Equation (8)

[0151] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation.

[0152] For example, N = 4, 64 × 4 = 256, that is, the NPBCH transmission period is 256 radio frames, and the starting radio frame of the NPBCH transmission period is the radio frame whose SFN satisfies: SFN mod 256 = 0.

[0153] Reference Figure 8 , Figure 8 This is a schematic diagram of the time-domain resources of the second type of NPBCH in the embodiments of this application. Figure 8 In the illustrated scheme, N=4, and only one downlink frame is active in every four consecutive radio frames. For example... Figure 8 As shown, radio frames with frame numbers 128, 132, 136, 140, 144, 148, 152, and 156 are third radio frames, and one subframe in each third radio frame is used to carry the NPBCH. That is, a third radio frame can include one active subframe. Figure 8 As shown, subframe 0 is used to carry NPBCH. In practice, one NPBCH transmission cycle requires the transmission of 8 NPBCH blocks (referred to as "blocks" in the diagram), where each NPBCH block occupies 100 REs on one subframe. Figure 4In the scheme, the radio frame with frame number 128 is the starting radio frame of the NPBCH transmission period, and radio frames with frame numbers 128, 132, 136, 140, 144, 148, 152 and 156 are used to repeat the transmission of block 0.

[0154] Continue to refer to Figure 6 , Figure 6 The method shown may also include: S64.

[0155] In step S64, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0156] For details regarding S64, please refer to the description of S24 above, which will not be repeated here.

[0157] Therefore, in the scheme of Embodiment 2, every N consecutive radio frames includes a single active downlink frame, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frame. Specifically, in two adjacent active downlink frames, the network device transmits NSSS only in one of the active downlink frames. In each active downlink frame, NPBCH occupies one subframe, and SIB1-NB occupies at least one subframe.

[0158] For more details regarding the first, second, third, and fourth wireless frames in Embodiment 2, please refer to the relevant descriptions in other embodiments herein, which will not be repeated here.

[0159] Example 3

[0160] In the scheme of Embodiment 3, every N consecutive radio frames includes M active downlink frames, where the M active downlink frames are the M consecutive radio frames out of the N consecutive radio frames. Specifically, in the N consecutive radio frames, the network device transmits signals or channels only on the M active downlink frames, where M is a positive integer, 1 < M < N. The value of M can be defined by the protocol or configured by the network device. For example, the network device can configure N and M separately for each carrier. Exemplarily, M = 2, or M = 4, or M = 8.

[0161] Reference Figure 9 , Figure 9 This is a signaling interaction diagram of the third communication method in the embodiments of this application, as shown below. Figure 9 As shown, Figure 9 The method shown may include at least one of S91, S92, S93, and S94. This document does not restrict the execution order of S91, S92, S93, and S94.

[0162] S91, the network device transmits NPSS on the first radio frame. The frame number of the first radio frame satisfies: SFN mod N = 0 or SFN mod N = i, where i is a positive integer, 0 ≤ i ≤ M-1. Correspondingly, the terminal device receives NPSS on the first radio frame.

[0163] In one implementation of S91, the frame number of the first radio frame satisfies equation (9):

[0164] SFN1 mod N=0 Equation (9)

[0165] Here, SFN1 represents the frame number of the first radio frame, and mod represents the modulo operation. That is, NPSS occupies only the first radio frame out of the M active radio frames.

[0166] In another implementation of S91, the frame number of the first radio frame satisfies equation (10):

[0167] SFN1 mod N=i(10)

[0168] Here, SFN1 represents the frame number of the first radio frame, mod represents the modulo operation, and i is a positive integer, 0 ≤ i ≤ M-1. That is, NPSS occupies M active radio frames. In other words, each active radio frame carries NPSS.

[0169] In practice, the terminal device receives the NPSS on the first radio frame. Based on the received NPSS, the terminal device can determine the boundary information of N radio frames.

[0170] S92, the network device transmits NSSS on the second radio frame, wherein the frame number of the second radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives NSSS on the second radio frame.

[0171] In this embodiment, the network device sends the NSSS only in the first downlink frame out of the M active downlink frames, and does not send the NSSS in the other (M-1) frames. For details regarding the second radio frame in S92, please refer to the description of S22 above, which will not be repeated here.

[0172] Reference Figure 10 , Figure 10 This is a schematic diagram of the time-domain resources of the third type of NPSS and NSSS in the embodiments of this application. Figure 10 In the illustrated scheme, N=4 and M=2. That is, there are 2 active radio frames out of every 4 consecutive radio frames. Figure 10Taking the radio frames numbered 4, 5, 6, and 7 as examples, frames 4 and 5 are active downlink frames. Similarly, for frames numbered 8, 9, 10, and 11, frames 8 and 9 are active downlink frames. And for frames numbered 12, 13, 14, and 15, frames 12 and 13 are active downlink frames. The network device transmits NPSS on frames numbered 4, 5, 8, 9, 12, 13, and 16, and NSSS on frames numbered 4, 8, 12, and 16, but does not transmit channels or signals on frames numbered 6, 7, 10, 11, 14, and 15.

[0173] Continue to refer to Figure 9 , Figure 9 The method shown may also include: S93.

[0174] S93, the network device transmits the NPBCH on the third radio frame. The NPBCH occupies a single subframe of the third radio frame, and the frame number SFN of the third radio frame satisfies: SFN mod j = 0, where j is a positive integer, 0 ≤ j ≤ M-1. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0175] In this embodiment, the frame number of the third wireless frame satisfies equation (11):

[0176] SFN3 mod j=0 Equation (11)

[0177] Here, SFN3 represents the frame number of the third radio frame, mod represents the modulo operation, and j is a positive integer, 0≤j≤M-1. That is, the NPBCH occupies M active downlink frames. In other words, each active downlink frame carries the NPBCH.

[0178] In this embodiment, the NPBCH is carried in a single subframe of the third radio frame. For example, the NPBCH occupies subframe 0 of the third radio frame.

[0179] In practical implementation, the network device transmits 8 NPBCH blocks in one NPBCH transmission cycle, where each NPBCH block is transmitted 8 times within one NPBCH transmission cycle. That is, one NPBCH transmission cycle requires 8 repetitions of 8 NPBCH blocks. Each transmission of each NPBCH block occupies one subframe; therefore, each NPBCH block occupies 8 active downlink subframes. In this embodiment, one third radio frame carries one NPBCH block, and within one third radio frame, the NPBCH occupies one subframe. Thus, each NPBCH block occupies... The third radio frame completes the 8-times repetition of the NPBCH block. That is, each NPBCH block occupies a consecutive... The active downlink frame in a radio frame. The NPBCH transmission period is There are 10 radio frames. The frame number of the starting radio frame in the NPBCH transmission period satisfies equation (12):

[0180]

[0181] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation.

[0182] In one example, M = 2. That is, two consecutive radio frames out of N consecutive radio frames are active downlink frames.

[0183] For example, N=4, M=2, 64×4 / 2=128. That is, the NPBCH transmission period is 128 radio frames, and the starting radio frame of the NPBCH transmission period is a radio frame whose SFN satisfies: SFN mod 128=0.

[0184] Reference Figure 11 , Figure 11 This is a schematic diagram of the time-domain resources of the third type of NPBCH in the embodiments of this application. Figure 11 In the illustrated scheme, N=4 and M=2. Radio frames numbered 128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153, 156, and 157 are third radio frames, and one subframe within each third radio frame is used to carry the NPBCH. That is, a third radio frame can include one active subframe. For example... Figure 11 As shown, subframe 0 is used to carry the NPBCH. Figure 11 As shown, one NPBCH transmission cycle requires the transmission of 8 NPBCH blocks (referred to as "blocks" in the figure). Each NPBCH block needs to be transmitted 8 times. Each NPBCH block occupies 100 REs in a subframe. The radio frame with frame number 128 is the starting radio frame of the NPBCH transmission cycle. Radio frames with frame numbers 128, 129, 132, 133, 136, 137, 140, and 141 are used to repeat the transmission of block 0. Radio frames with frame numbers 144, 145, 148, 149, 152, 153, 156, and 157 are used to repeat the transmission of block 1.

[0185] Continue to refer to Figure 9 , Figure 9 It may also include: S94.

[0186] In step S94, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0187] The fourth radio frame is the active downlink frame, and the SIB1-NB can occupy X subframes in the fourth radio frame. X is a positive integer, and 1≤X≤10.

[0188] For example, X = 1. For instance, subframe 4 in the fourth radio frame is used to carry SIB1-NB.

[0189] For example, X = 2. For instance, with X = 2, subframes 3 and 4 in the fourth radio frame are used to carry SIB1-NB.

[0190] Specifically, every N consecutive radio frames includes M consecutive active downlink frames, of which K downlink frames can carry SIB1-NB. That is, the network device can transmit SIB1-NB in ​​K downlink frames out of the M consecutive active downlink frames. In other words, the M active downlink frames include K fourth radio frames. For example, the first to the Kth active downlink frames out of the M active downlink frames may be used to carry SIB1-NB, but this is not a limitation. Here, K is a positive integer, 1 ≤ K ≤ M.

[0191] Specifically, the SIB1-NB transmission cycle can be One wireless frame, that is, the transmission period of SIB1-NB can be ms. Within a single SIB1-NB transmission cycle, the SIB1-NB is transmitted multiple times. The number of times the SIB1-NB is transmitted within a single SIB1-NB transmission cycle can be indicated by the network device. For example, the MIB can indicate the number of times the SIB1-NB is transmitted.

[0192] One transmission of SIB1-NB requires 8 active subframes; therefore, one transmission of SIB1-NB occupies consecutive subframes. One active downlink frame. That is, one transmission of SIB1-NB occupies a continuous [number] downlink frames. The downlink frame that is active in a radio frame.

[0193] Among them, the frame number of the starting radio frame of the SIB1-NB transmission period satisfies equation (13):

[0194]

[0195] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle, and Y in equation (13) depends on the number of repeated transmissions of SIB1-NB and the cell identifier of the current cell.

[0196] In one example, N=4, K=M=2, X=1. The SIB1-NB transmission period can be... Each wireless frame occupies a consecutive space in a single transmission from SIB1 to NB. One active downlink frame. That is, one transmission of SIB1-NB occupies a continuous [number] downlink frames. The downlink frame that is active in a radio frame.

[0197] For example, the value of Y can be determined based on Table 3.

[0198] Table 3

[0199]

[0200] In one possible implementation, K = M. That is, the network device can send SIB1-NB in ​​every active downlink frame. Specifically, the SIB1-NB transmission period can be... Each wireless frame occupies a consecutive space in a single transmission from SIB1 to NB. One active radio frame. That is, one transmission of SIB1-NB occupies a continuous [number] radio frames. The fourth radio frame in a series of radio frames.

[0201] Among them, the frame number of the starting radio frame of the SIB1-NB transmission period satisfies equation (14):

[0202]

[0203] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle. In equation (14), Y depends on the number of repeated transmissions of the SIB1-NB and the cell identifier of the current cell.

[0204] In one example, X=1, K=M. A single transmission of SIB1-NB occupies 8 active downlink frames. That is, a single transmission of SIB1-NB occupies 8 consecutive downlink frames. The downlink frames activated within a radio frame. The SIB1-NB transmission period is... The frame number of the starting radio frame in the SIB1-NB transmission cycle satisfies equation (15):

[0205]

[0206] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle, mod represents the modulo operation, and the value of Y can be determined based on Table 4.

[0207] Table 4

[0208]

[0209] In a specific example, the MIB indicates that the number of retransmissions for SIB1-NB is 4, and the current cell identifier N cell-ID The value of is 8, and according to Table 4, the value of Y is 0.

[0210] Reference Figure 12 , Figure 12 This is a schematic diagram of the time-domain resources of the second type of SIB1-NB in ​​the embodiments of this application. Figure 12 In the illustrated scheme, N=4, K=M=2, and X=1. There are two active downlink frames in every four consecutive radio frames. The network device transmits SIB1-NB in ​​each active downlink frame, and SIB1-NB occupies one subframe in each active downlink frame. Figure 12 In this scheme, the transmission period of SIB1-NB is 512 radio frames, and within one SIB1-NB transmission period, SIB1-NB repeats the transmission 4 times. Figure 5 The starting radio frame of the SIB1-NB transmission cycle shown is frame number 512. The network device performs the first transmission of SIB1-NB in ​​this transmission cycle on radio frames with frame numbers 512, 513, 516, 517, 520, 521, 524 and 525.

[0211] In another example, X = 2, K = M. Two subframes in an active downlink frame are used to carry SIB1-NB, and one transmission of SIB1-NB occupies four active downlink frames. That is, one transmission of SIB1-NB occupies consecutive... The downlink frames activated within a radio frame. The SIB1-NB transmission period is... The frame number of the starting radio frame in the SIB1-NB transmission cycle satisfies equation (16):

[0212]

[0213] Wherein, SFN_st2 represents the starting radio frame of the SIB1-NB transmission cycle, mod represents the modulo operation, and the value of Y can be determined based on Table 5.

[0214] Table 5

[0215]

[0216] In a specific example, the MIB indicates that the number of retransmissions for SIB1-NB is 4, and the current cell identifier N cell-ID The value of is 12, and according to Table 5, the value of Y is 0.

[0217] Reference Figure 13 , Figure 13This is a schematic diagram of the time-domain resources of the third type of SIB1-NB in ​​this application embodiment. Figure 13 In the illustrated scheme, N=4, K=M=2, and X=2. There are two active downlink frames in every four consecutive radio frames. The network device transmits SIB1-NB in ​​each active downlink frame, and SIB1-NB occupies two subframes within an active downlink frame. Figure 13 In this scheme, the transmission period of SIB1-NB is 256 radio frames, and within one SIB1-NB transmission period, SIB1-NB repeats the transmission 4 times. Figure 13 The starting radio frame of the SIB1-NB transmission cycle shown is frame number 512. The network device performs the first transmission of SIB1-NB in ​​this transmission cycle on radio frames with frame numbers 512, 513, 516, and 517.

[0218] Therefore, in the scheme of Embodiment 3, every N consecutive radio frames includes M consecutive active downlink frames, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frames. Among them, in the active downlink frames, NPBCH occupies one subframe, and SIB1-NB occupies at least one subframe.

[0219] For details regarding the first, second, third, and fourth wireless frames in Embodiment 3, please refer to the relevant descriptions in other embodiments of this document, which will not be repeated here.

[0220] Example 4

[0221] In the scheme of Embodiment 4, every N consecutive radio frames includes M active downlink frames, and the M active downlink frames are M consecutive radio frames.

[0222] Reference Figure 14 , Figure 14 This is a signaling interaction diagram of the fourth communication method in the embodiments of this application, as shown below. Figure 14 As shown, Figure 14 The method shown may include at least one of S141, S142, S143, and S144. This document does not restrict the execution order of S141, S142, S143, and S144.

[0223] S141, the network device transmits NPSS on the first radio frame. The frame number of the first radio frame satisfies: SFN mod N = 0 or SFN mod N = i, where i is a positive integer, 0 ≤ i ≤ M-1. Correspondingly, the terminal device receives NPSS on the first radio frame.

[0224] For details regarding S141, please refer to the above description of S91, which will not be repeated here.

[0225] S142, the network device transmits NSSS on the second radio frame, wherein the frame number of the second radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives NSSS on the second radio frame.

[0226] For details regarding S142, please refer to the descriptions of S22 and S92 above, which will not be repeated here.

[0227] S143, the network device transmits the NPBCH on the third radio frame. The NPBCH occupies two subframes of the third radio frame, which consists of M active downlink frames. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0228] The specific content of the "third wireless frame" in S143 can be found in the relevant description in Embodiment 3 above, and will not be repeated here.

[0229] In this embodiment, the NPBCH occupies two subframes in the third radio frame. For example, the NPBCH occupies subframe 0 of the third radio frame, and also occupies one of subframes 1 to 9.

[0230] In practical implementation, the network device transmits 8 NPBCH blocks in one NPBCH transmission cycle, where each NPBCH block is transmitted 8 times within one NPBCH transmission cycle. That is, one NPBCH transmission cycle requires 8 repetitions of the 8 NPBCH blocks. Each transmission of each NPBCH block occupies one subframe. Therefore, each NPBCH block occupies 8 active subframes. In this embodiment, one third radio frame carries one NPBCH block, and within one third radio frame, the NPBCH occupies 2 subframes. Thus, the transmission of each NPBCH block occupies 4 third radio frames, thereby completing the 8 repetitions of the NPBCH block. That is, each NPBCH block occupies consecutive subframes. The downlink frame activated in each radio frame. The NPBCH transmission period is... There are 10 radio frames. The frame number of the starting radio frame in the NPBCH transmission period satisfies equation (17):

[0231]

[0232] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation.

[0233] In one example, M = 4. That is, 4 consecutive downlink frames out of N consecutive radio frames are active radio frames. Furthermore, 2 symbols in each active downlink frame are used to transmit the NPBCH. Thus, the transmission period of the NPBCH is 8 × N radio frames, where the transmission of each NPBCH block occupies 4 active downlink frames.

[0234] For example, when N=6 and M=4, the transmission period of NPBCH is... The NPBCH transmission period begins with a radio frame whose SFN satisfies: SFN mod 48 = 0.

[0235] Reference Figure 15 , Figure 15 This is a schematic diagram of the time-domain resources of the fourth type of NPBCH in the embodiments of this application. Figure 15 In the illustrated scheme, N = 6 and M = 4. Figure 15 In this context, radio frames with frame numbers 48, 49, 50, 51, 54, 55, 56, 57, 60, 61, 62, 63, 66, 67, 68, 69, 72, 73, 74, and 75 are designated as third radio frames, and each third radio frame contains two subframes used to carry the NPBCH. Specifically, each active downlink frame contains two subframes used to transmit the NPBCH. That is, a third radio frame can include two active subframes. For example... Figure 8 As shown, subframes 0 and 1 are used to carry the NPBCH. Radio frame number 48 is the start radio frame of an NPBCH transmission cycle. Radio frames numbered 48, 49, 50, and 51 are used to repeat block 0, radio frames numbered 54, 55, 56, and 57 are used to repeat block 1, radio frames numbered 60, 61, 62, and 63 are used to repeat block 2, radio frames numbered 66, 67, 68, and 69 are used to repeat block 3, and radio frames numbered 72, 73, 74, and 75 are used to repeat block 4.

[0236] Continue to refer to Figure 14 , Figure 14 It may also include: S144.

[0237] S144, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0238] For details regarding S144, please refer to the above description of S94; it will not be repeated here.

[0239] Therefore, in the scheme of Embodiment 4, every N consecutive radio frames includes M consecutive active downlink frames, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frames. Among them, in the active downlink frames, NPBCH occupies 2 subframes, and SIB1-NB occupies at least one subframe.

[0240] For more details on Embodiment 4, please refer to the relevant descriptions of other embodiments in this document, which will not be repeated here.

[0241] Example 5

[0242] In the scheme of Embodiment 5, every N consecutive radio frames includes M active downlink frames, and the M active downlink frames are M consecutive radio frames in the N consecutive radio frames.

[0243] Reference Figure 16 , Figure 16 This is a signaling interaction diagram of the fifth communication method in the embodiments of this application, as shown below. Figure 16 As shown, Figure 16 The method shown may include at least one of S161, S162, S163, and S164. This document does not restrict the execution order of S161, S162, S163, and S164.

[0244] S161, the network device transmits NPSS on the first radio frame. The frame number of the first radio frame satisfies: SFN mod N = 0 or SFN mod N = i, where i is a positive integer, 0 ≤ i ≤ M-1. Correspondingly, the terminal device receives NPSS on the first radio frame.

[0245] S162, the network device transmits NSSS on the second radio frame, wherein the frame number of the second radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives NSSS on the second radio frame.

[0246] In step S163, the network device transmits the NPBCH on the third radio frame, and the NPBCH occupies Q subframes of the third radio frame. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0247] For details regarding S161 and S162, please refer to the relevant descriptions of Embodiments 3 and 4 above, which will not be repeated here.

[0248] In this embodiment, the third radio frame can be L downlink frames out of M active downlink frames. Here, L is a positive integer, and 1 ≤ L ≤ M. In one possible implementation, the L downlink frames can be the first L downlink frames out of the M active downlink frames. Specifically, the frame number SFN of the third radio frame can satisfy equation (18):

[0249] SFN mod j = 0, Equation (18)

[0250] Where SFN3 represents the frame number of the third radio frame, mod represents the modulo operation, j is a positive integer, 0≤j≤L-1.

[0251] In practice, the value of L can be defined by the protocol or configured by the network device.

[0252] In practical implementation, the network device transmits 8 NPBCH blocks in one NPBCH transmission cycle, where each NPBCH block is transmitted 8 times within one NPBCH transmission cycle. That is, one NPBCH transmission cycle requires 8 repetitions of the 8 NPBCH blocks. Each transmission of each NPBCH block occupies one subframe; therefore, each NPBCH block occupies 8 active subframes. In this embodiment, the NPBCH occupies Q subframes in the third radio frame, and each NPBCH block occupies... The third radio frame completes the 8-times repetition of the NPBCH block. That is, each NPBCH block occupies a consecutive... The downlink frame activated in each radio frame. The NPBCH transmission period is... There are 10 radio frames. The frame number of the starting radio frame in the NPBCH transmission period satisfies equation (19):

[0253]

[0254] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation.

[0255] In one possible implementation, the values ​​of L and Q can satisfy: L × Q = 2.

[0256] In one example, L = 2, Q = 1. M ≥ 2. For example, M = 4.

[0257] In one example, N=6, M=4, Q=1, L=2. The transmission period of the NPBCH is... The NPBCH transmission period begins with a radio frame whose frame number satisfies: =0 wireless frames.

[0258] Reference Figure 17 , Figure 17 This is a schematic diagram of the time-domain resources of the fifth type of NPBCH in the embodiments of this application. Figure 17In the illustrated scheme, N=6, M=4, Q=1, and L=2. Specifically, there are 4 active downlink frames in every 6 consecutive radio frames. The first and second active downlink frames of these 4 active downlink frames are used to transmit the NPBCH. That is, the first and second active downlink frames of these 4 active downlink frames constitute the third radio frame, and one subframe within a third radio frame is used to transmit the NPBCH. In other words, a third radio frame can include one active subframe. For example... Figure 17 As shown, subframe 0 is used to carry the NPBCH. An NPBCH block occupies 8 third radio frames out of 24 consecutive radio frames.

[0259] like Figure 17 As shown, the NPBCH transmission period is 192 radio frames. Figure 17 The radio frame with frame number 192 is the starting radio frame of an NPBCH transmission cycle. Frame numbers 192, 193, 194, 195, 198, 199, 200, 201, 204, 205, 206, 207, 210, 211, 212, 213, 216, 217, 218, and 219 are active radio frames. Among them, frame numbers 192, 193, 198, 199, 204, 205, 210, 211, 216, and 217 are third radio frames. Radio frames with frame numbers 192, 193, 198, 199, 204, 205, 210, and 211 are used to repeat block 0.

[0260] In another example, L = 1, Q = 2, and M ≥ 1. For example, M = 4.

[0261] Reference Figure 18 , Figure 18 This is a schematic diagram of the time-domain resources of the sixth type of NPBCH in the embodiments of this application. Figure 18 In the illustrated scheme, N=6, M=4, Q=2, and L=1. Specifically, there are 4 active downlink frames in every 6 consecutive radio frames. The first downlink frame among these 4 active downlink frames is used to transmit the NPBCH. That is, the first downlink frame among the 4 active downlink frames is the third radio frame, and two subframes within a third radio frame are used to transmit the NPBCH; in other words, a third radio frame can include 2 active subframes. For example... Figure 18 As shown, subframes 0 and 1 are used to carry the NPBCH. One NPBCH block occupies four third radio frames out of 24 consecutive radio frames.

[0262] like Figure 18 As shown, the NPBCH transmission period is 192 radio frames. Figure 18The radio frame with frame number 192 is the starting radio frame of an NPBCH transmission cycle. Frame numbers 192, 193, 194, 195, 198, 199, 200, 201, 204, 205, 206, 207, 210, 211, 212, 213, 216, 217, 218, and 219 are active radio frames. Among them, frame numbers 192, 198, 204, 210, 216, and 217 are the third radio frames. Radio frames with frame numbers 192, 198, 204, and 210 are used to repeat the transmission of block 0.

[0263] Continue to refer to Figure 16 , Figure 16 It may also include: S164.

[0264] S164, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0265] For details regarding S164, please refer to the above description of S94; it will not be repeated here.

[0266] Therefore, in the scheme of Embodiment 5, every N consecutive radio frames includes M consecutive active downlink frames, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frames. Specifically, the network device transmits NPBCH on L downlink frames out of the M active downlink frames.

[0267] Example 6

[0268] In the scheme of Embodiment Six, every N consecutive radio frames includes M active downlink frames, and the M active downlink frames are M consecutive radio frames out of the N consecutive radio frames.

[0269] Reference Figure 19 , Figure 19 This is a signaling interaction diagram of the sixth communication method in the embodiments of this application, as shown below. Figure 19 As shown, Figure 19 The method shown may include at least one of S191, S192, S193, and S194. This document does not restrict the execution order of S191, S192, S193, and S194.

[0270] S191, the network device transmits NPSS on the first radio frame. The frame number of the first radio frame satisfies: SFN mod N = 0 or SFN mod N = i, where i is a positive integer, 0 ≤ i ≤ M-1. Correspondingly, the terminal device receives NPSS on the first radio frame.

[0271] For details regarding S191, please refer to the above description of S93; it will not be repeated here.

[0272] S192, the network device transmits NSSS on the second radio frame, where the frame number of the second radio frame satisfies: SFN mod(2×N)=0. Correspondingly, the terminal device receives NSSS on the second radio frame.

[0273] Specifically, the frame number of the second wireless frame in this embodiment satisfies equation (7) above.

[0274] In this embodiment, in two adjacent sets of active downlink frames, the network device only sends NSSS on the first downlink frame of one set of active downlink frames, and does not send NSSS in the other set of active downlink frames. Here, "a set of active downlink frames" refers to M active downlink frames out of every N consecutive radio frames.

[0275] Reference Figure 20 , Figure 20 This is a schematic diagram of the time-domain resources of the fourth type of NPSS and NSSS in the embodiments of this application. Figure 20 In the illustrated scheme, N=6, M=4, and there are 4 active downlink frames in every 4 consecutive radio frames. Figure 20 Taking the radio frames numbered 12, 13, 14, 15, 16, and 17 as an example, among these six frames, frames numbered 12, 13, 14, and 15 are active downlink frames. The network device transmits NPSS on each active downlink frame. Furthermore, in adjacent groups of active downlink frames, the network device only transmits NSSS on the first downlink frame in one group of active downlink frames.

[0276] like Figure 20 As shown, radio frames with frame numbers 12, 13, 14, 15, 18, 19, 20, 21, 24, 25, 26, 27, 30, 31, 32 and 33 are active radio frames. Each active radio frame carries an NPSS, while radio frames with frame numbers 12 and 24 carry an NSSS.

[0277] Continue to refer to Figure 19 , Figure 19 The method shown also includes: S193.

[0278] In S193, the network device transmits the NPBCH on the third radio frame. The NPBCH occupies one subframe of the third radio frame, and the frame number SFN of the third radio frame satisfies: SFN mod N = 0. Correspondingly, the terminal device receives the NPBCH on the third radio frame.

[0279] In this embodiment, the third downlink frame can be the first downlink frame in each group of active downlink frames, and the NPBCH occupies one subframe in the third downlink frame. Therefore, each NPBCH block occupies 8 third radio frames out of a consecutive 8×N radio frames, and the NPBCH transmission period is 64×N radio frames.

[0280] The frame number of the starting radio frame in the NPBCH transmission period satisfies equation (20):

[0281] SFN_st1 mod(64×N)=0 Equation (20):

[0282] Where SFN_st1 represents the frame number of the starting radio frame of the NPBCH transmission cycle, and mod represents the modulo operation.

[0283] In one example, N=6, M=4, the NPBCH transmission period is 64×6=384 radio frames, and the starting radio frame of the NPBCH transmission period is the radio frame with frame number SFN satisfying SFN mod 64×6=384=0.

[0284] Reference Figure 21 , Figure 21 This is a schematic diagram of the time-domain resources of the seventh type of NPBCH in the embodiments of this application. Figure 21 In the illustrated scheme, N=6 and M=4. That is, there are 4 active downlink frames out of every 6 consecutive downlink frames. The first of these 4 active downlink frames is the third radio frame, and the NPBCH occupies one subframe within a third radio frame. In other words, a third radio frame can include one active subframe. For example... Figure 8 As shown, subframe 0 is used to carry the NPBCH. Figure 21 In the illustrated scheme, the NPBCH transmission period is 384 radio frames. Figure 21 In the radio frames shown, the radio frame with frame number 384 is the starting radio frame of an NPBCH transmission cycle. The radio frames with frame numbers 384-387, 390-393, 396-399, 402-405, 408-411, 414-417, 420-423, and 426-429 are active radio frames. Among them, the radio frames with frame numbers 384, 390, 396, 402, 408, 414, 420, and 426 are third radio frames. The radio frames with frame numbers 384, 390, 396, 402, 408, 414, 420, and 426 are used to repeat the transmission of block 0.

[0285] Continue to refer to Figure 19 , Figure 19 The method shown also includes: S194.

[0286] In step S194, the network device transmits SIB1-NB on the fourth radio frame. Correspondingly, the terminal device receives SIB1-NB on the fourth radio frame.

[0287] For details regarding S194, please refer to the above description of S94; it will not be repeated here.

[0288] Therefore, in the scheme of Embodiment Six, every N consecutive radio frames includes M consecutive active downlink frames, and the network device transmits at least one of NPSS, NSSS, NPBCH, and SIB1-NB only on the active downlink frames. Specifically, the network device transmits NSSS and NPBCH on one downlink frame within each group of active downlink frames.

[0289] Example 7

[0290] Reference Figure 22 , Figure 22 This is a flowchart illustrating the seventh communication method in the embodiments of this application. Figure 22 The illustrated solution can be applied to terminal devices, for example, Figure 22 The method shown can be executed by a terminal device, or by a chip or chip module with communication capabilities within the terminal device. For example... Figure 22 As shown, Figure 22 The method shown may include at least one of S221, S222, S223 and S224.

[0291] S221: Receive NPSS in the first radio frame, where the first radio frame is an active downlink frame.

[0292] S222: Receive NSSS in the second radio frame, where the second radio frame is an active downlink frame.

[0293] S223: Receive NPBCH transmission in the third radio frame, where the third radio frame is an active downlink frame.

[0294] S224: Receive SIB1-NB in ​​the fourth radio frame, where the fourth radio frame is an active downlink frame.

[0295] Wherein, every N consecutive radio frames includes a single active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames, where N and M are both positive integers greater than 1, and M is less than N.

[0296] In one possible implementation, the SFN of the first radio frame satisfies: SFN mod N = 0; or, SFN mod N = i, where i is an integer, 0 ≤ i ≤ M-1.

[0297] In one possible implementation, the SFN of the second radio frame satisfies: SFN mod(q×N)=0, where q is a positive integer. For example, q=1, or q=2, or q=3, or q=4, etc.

[0298] In practice, the NPBCH can occupy Q subframes within a third radio frame. Q is a positive integer, and its value can be configured by the network device or defined by the protocol. For example, Q=1, Q=2, Q=3, or Q=4, etc.

[0299] In one possible implementation, the SFN of the third radio frame satisfies: SFN mod N = 0.

[0300] In one possible implementation, the SFN of the third radio frame satisfies: SFN mod j = 0, where i is an integer, 0 ≤ j ≤ L-1, L is a positive integer, 1 ≤ L ≤ M-1.

[0301] In practical implementation, an SIB1-NB can occupy X subframes in a fourth radio frame, where X is a positive integer. The value of X can be configured by the network device or defined by the protocol. For example, X=1, X=2, X=3, or X=4, etc. For details regarding the first, second, third, and fourth radio frames, please refer to the relevant descriptions above.

[0302] It should be noted that, in the embodiments of this application, multiple frames in the first, second, third, and fourth radio frames can be the same radio frame. Furthermore, NPSS, NSSS, NPBCH, and SIB1-NB can occupy different subframes of the same active downlink frame.

[0303] For more details about this embodiment, please refer to the descriptions of Embodiments 1 to 6 above, which will not be repeated here.

[0304] It should be understood that the above embodiments can be used individually or in combination to achieve different technical effects.

[0305] It is understandable that, in specific implementation, the above method can be implemented using a software program that runs in the processor integrated inside the chip or chip module; or, the method can be implemented using hardware or a combination of hardware and software, such as using a dedicated chip or chip module, or using a dedicated chip or chip module combined with a software program.

[0306] Reference Figure 23 , Figure 23 This is a schematic diagram of the structure of a communication device according to an embodiment of this application. Figure 23The communication device shown can be deployed on the aforementioned terminal equipment. Figure 23 The apparatus shown may include:

[0307] Communication module 231 is configured to perform at least one of the following:

[0308] The narrowband master synchronization signal (NPSS) is received in the first radio frame, which is an active downlink frame.

[0309] The narrowband secondary synchronization signal NSSS is received in the second radio frame, which is an active downlink frame;

[0310] Narrowband Physical Broadcast Channel (NPBCH) transmission is received in the third radio frame, which is an active downlink frame.

[0311] Narrowband System Information Block SIB1-NB is received in the fourth radio frame, which is an active downlink frame;

[0312] Wherein, every N consecutive radio frames includes a single active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames, where N and M are both positive integers greater than 1, and M is less than N.

[0313] In practice, Figure 23 The communication device shown may correspond to a chip with communication function in a terminal device; or to a terminal device including a chip or chip module with communication function, or to a terminal device.

[0314] Reference Figure 24 , Figure 24 This is a schematic diagram of another communication device in the embodiments of this application. Figure 24 The communication device shown can be deployed on the aforementioned network equipment. Figure 24 The apparatus shown may include:

[0315] Communication module 241 is configured to perform at least one of the following:

[0316] In the first radio frame, a narrowband master synchronization signal (NPSS) is transmitted, and the first radio frame is an active downlink frame.

[0317] In the second radio frame, a narrowband secondary synchronization signal (NSSS) is transmitted, and the second radio frame is an active downlink frame.

[0318] In the third radio frame, NPBCH transmission is carried out, which is an active downlink frame;

[0319] In the fourth radio frame, the narrowband system information block SIB1-NB is transmitted, and the fourth radio frame is an active downlink frame;

[0320] Wherein, every N consecutive radio frames includes a single active downlink frame, or every N consecutive radio frames includes M consecutive active downlink frames, where N and M are both positive integers greater than 1, and M is less than N.

[0321] In practice, Figure 24 The communication device shown may correspond to a chip with communication function in a network device; or to a network device including a chip or chip module with communication function, or to a network device.

[0322] For more information on the working principle, working method, and beneficial effects of the communication device in the embodiments of this application, please refer to the relevant description of the communication method above, which will not be repeated here.

[0323] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer program is run by a processor, the aforementioned communication method is executed. The storage medium may include ROM, RAM, a magnetic disk, or an optical disk, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0324] This application also provides a computer program product, which includes a computer program that, when run on a computer, causes the computer to perform the methods provided in the above embodiments.

[0325] This application also provides a communication device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, it performs the steps of the communication method described above. This communication device can be either a network device or a terminal device as described above.

[0326] Reference Figure 25 , Figure 25 This is a schematic diagram of the hardware architecture of a communication device according to an embodiment of this application. Figure 25 The communication device shown can be either the network device mentioned above or the terminal device mentioned above. Figure 25The illustrated communication device includes a memory 251, a processor 252, and a transceiver 253. The processor 252 is coupled to the memory 251 and the transceiver 253. The memory 251 may be located within or outside the communication device. The memory 251, processor 252, and transceiver 253 can be connected via a communication bus. The transceiver 253 is used to communicate with other devices. The memory 251 stores a computer program that can run on the processor 252. When the processor 252 runs the computer program, it performs the steps in the methods provided in the above embodiments, and / or, when the processor 252 runs the computer program, the transceiver 253 performs the steps in the methods provided in the above embodiments.

[0327] It should be understood that in the embodiments of this application, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0328] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0329] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.

[0330] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply 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 embodiments of this application.

[0331] In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatuses, and systems can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0332] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0333] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can be physically included separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units. For example, for various devices or products applied to or integrated into a chip, each module / unit can be implemented using hardware such as circuits, or at least some modules / units can be implemented using software programs running on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware such as circuits; for various devices or products applied to or integrated into a chip module, each module / unit can be implemented using hardware such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0334] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0335] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0336] In the embodiments of this application, "multiple" refers to two or more.

[0337] The descriptions of "first," "second," etc., appearing in the embodiments of this application are for illustrative purposes and to distinguish the objects being described. They have no order and do not indicate any special limitation on the number of devices in the embodiments of this application, nor do they constitute any limitation on the embodiments of this application.

[0338] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A communication method, characterized in that, The method includes receiving a narrowband primary synchronization signal (NPSS) in a first radio frame, wherein the first radio frame is the active downlink frame. And / or, receive a narrowband secondary synchronization signal (NSSS) in a second radio frame, where the second radio frame is the activated downlink frame; And / or, receive the Narrowband Physical Broadcast Channel (NPBCH) in a third radio frame, the third radio frame being the activated downlink frame; And / or, receive narrowband system information block SIB1-NB in ​​the fourth radio frame, the fourth radio frame being the activated downlink frame; Where N and M are both positive integers greater than 1, and M is less than N.

2. The communication method according to claim 1, characterized in that, The frame number SFN of the first wireless frame satisfies: SFN mod N = 0; Alternatively, each N consecutive radio frames may include M consecutive active downlink frames, where the frame number SFN of the first radio frame satisfies: SFN mod N = i, where i is an integer, 0 ≤ i ≤ M-1.

3. The communication method according to claim 1, characterized in that, The frame number SFN of the second wireless frame satisfies: SFNmod N = 0.

4. The communication method according to claim 1, characterized in that, Every N consecutive radio frames includes one active downlink frame, and the NPBCH transmission satisfies the following: The NPBCH transmission occupies two subframes in the third radio frame; And / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; And / or, the NPBCH transmission period is 32×N radio frames; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod(32×N)=0; And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block.

5. The communication method according to claim 1, characterized in that, Every N consecutive radio frames includes M consecutive active downlink frames, and the NPBCH transmission satisfies: The NPBCH transmission occupies Q subframes in the third radio frame, where Q is a positive integer; And / or, the frame number SFN of the third wireless frame satisfies: SFN mod j = 0, where j is an integer, 0 ≤ j ≤ L-1; And / or, the NPBCH transmission period is One wireless frame; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN modulo 1 And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block; Where L is a positive integer, and 1≤L≤M.

6. The communication method according to claim 1, characterized in that, The frame number SFN of the second wireless frame satisfies: SFNmod(2×N)=0.

7. The communication method according to claim 1, characterized in that, Every N consecutive radio frames includes one active downlink frame, and the NPBCH transmission satisfies: The NPBCH transmission occupies one subframe of the third radio frame; And / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; And / or, the NPBCH transmission period is 64×N radio frames; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod(64×N)=0; And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block.

8. The communication method according to claim 1, characterized in that, The SIB1-NB occupies X subframes in the fourth radio frame, where X is a positive integer.

9. The communication method according to claim 8, characterized in that, X is a positive integer greater than 1.

10. The communication method according to claim 8, characterized in that, The SIB1-NB satisfies: The SIB1-NB transmission cycle is: One wireless frame; And / or, within one SIB1-NB transmission cycle, the SIB1-NB is repeatedly transmitted multiple times, with each transmission occupying [time / period]. One wireless frame; And / or, the frame number of the starting radio frame of the SIB1-NB transmission cycle satisfies: SFN mod Wherein, Y depends on the number of repeated transmissions of the SIB1-NB and the cell identifier of the current cell; Where K is a positive integer, and 1≤K≤M.

11. A communication method, characterized in that, The method includes transmitting a narrowband master synchronization signal (NPSS) in a first radio frame, wherein the first radio frame is the active downlink frame. And / or, transmit a narrowband secondary synchronization signal (NSSS) in a second radio frame, the second radio frame being the activated downlink frame; And / or, transmit Narrowband Physical Broadcast Channel (NPBCH) transmission in a third radio frame, the third radio frame being the activated downlink frame; And / or, transmit narrowband system information block SIB1-NB in ​​the fourth radio frame, the fourth radio frame being the activated downlink frame; Where N and M are both positive integers greater than 1, and M is less than N.

12. The communication method according to claim 11, characterized in that, Frame number of the first wireless frame SFN satisfies: SFN mod N = 0; Alternatively, each N consecutive radio frames may include M consecutive active downlink frames, where the frame number SFN of the first radio frame satisfies: SFN mod N = i, where i is an integer, 0 ≤ i ≤ M-1.

13. The communication method according to claim 11, characterized in that, The frame number SFN of the second wireless frame satisfies: SFN mod N = 0.

14. The communication method according to claim 11, characterized in that, Every N consecutive radio frames includes one of the active downlink frames, and the NPBCH transmission satisfies at least one of the following: The NPBCH transmission occupies two subframes in the third radio frame; And / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; And / or, the NPBCH transmission period is 32×N radio frames; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod(32×N)=0; And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block.

15. The communication method according to claim 11, characterized in that, Every N consecutive radio frames include M consecutive active downlink frames, and the NPBCH transmission satisfies at least one of the following: the NPBCH transmission occupies Q subframes in the third radio frame, where Q is a positive integer; And / or, the frame number SFN of the third wireless frame satisfies: SFN mod j = 0, where j is an integer, 0 ≤ j ≤ L-1; And / or, the NPBCH transmission period is One wireless frame; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN modulo 1 And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block; Where L is a positive integer, and 1≤L≤M.

16. The communication method according to claim 11, characterized in that, The frame number SFN of the second wireless frame satisfies: SFN mod(2×N)=0.

17. The communication method according to claim 11, characterized in that, Every N consecutive radio frames includes one of the active downlink frames, and the NPBCH transmission satisfies at least one of the following: The NPBCH transmission occupies one subframe of the third radio frame; And / or, the frame number SFN of the third radio frame satisfies: SFN mod N = 0; And / or, the NPBCH transmission period is 64×N radio frames; And / or, the frame number SFN of the starting radio frame of the NPBCH transmission period satisfies: SFN mod(64×N)=0; And / or, one NPBCH transmission cycle is used to transmit 8 NPBCH blocks, and one of the third radio frames is used to carry one NPBCH block.

18. The communication method according to claim 11, characterized in that, The SIB1-NB occupies X subframes in the fourth radio frame, where X is a positive integer.

19. The communication method according to claim 18, characterized in that, X is a positive integer greater than 1.

20. The communication method according to claim 18, characterized in that, The SIB1-NB satisfies: The SIB1-NB transmission cycle is: One wireless frame; And / or, within one SIB1-NB transmission cycle, the SIB1-NB is repeatedly transmitted multiple times, with each transmission occupying [time / period]. One wireless frame; And / or, the frame number of the starting radio frame of the SIB1-NB transmission cycle satisfies: SFN mod Wherein, Y depends on the number of repeated transmissions of the SIB1-NB and the cell identifier of the current cell; Where K is a positive integer, and 1≤K≤M.

21. A communication device, characterized in that, The apparatus comprises a communication module for performing the following steps: Each N consecutive radio frames includes one active downlink frame, or each N consecutive radio frames includes M consecutive active downlink frames. The narrowband primary synchronization signal (NPSS) is received in the first radio frame, which is the activated downlink frame. And / or, receive a narrowband secondary synchronization signal (NSSS) in a second radio frame, where the second radio frame is the activated downlink frame; And / or, receive Narrowband Physical Broadcast Channel (NPBCH) transmission in a third radio frame, wherein the third radio frame is the activated downlink frame; And / or, receive narrowband system information block SIB1-NB in ​​the fourth radio frame, the fourth radio frame being the activated downlink frame; Where N and M are both positive integers greater than 1, and M is less than N.

22. A communication device, characterized in that, The apparatus comprises a communication module for performing the following steps: Each N consecutive radio frames includes one active downlink frame, or each N consecutive radio frames includes M consecutive active downlink frames. In the first radio frame, a narrowband primary synchronization signal (NPSS) is transmitted, where the first radio frame is the activated downlink frame. And / or, transmit a narrowband secondary synchronization signal (NSSS) in a second radio frame, the second radio frame being the activated downlink frame; And / or, transmit Narrowband Physical Broadcast Channel (NPBCH) transmission in a third radio frame, the third radio frame being the activated downlink frame; And / or, transmit narrowband system information block SIB1-NB in ​​the fourth radio frame, the fourth radio frame being the activated downlink frame; Where N and M are both positive integers greater than 1, and M is less than N.

23. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor, the communication method according to any one of claims 1 to 10 or the communication method according to any one of claims 11 to 20 is executed.

24. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the communication method according to any one of claims 1 to 10 or the communication method according to any one of claims 11 to 20.

25. A communication device comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the communication method according to any one of claims 1 to 10.

26. A communication device comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the communication method according to any one of claims 11 to 20.

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