Wireless communication method and device, and storage medium

Abstract

Provided in the embodiments of the present application are a wireless communication method and device, and a storage medium. The method comprises: a terminal device receives at least one first channel sent by a first access device set, the first access device set including at least one access device, the first channel sent by the first access device set being used to determine whether the first access device set is a target access device set, and the target access device set being used for data communication with the terminal device.

Description

Wireless communication method, device, and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technologies, and in particular to a wireless communication method and device, and a storage medium. Background Art

[0002] A decellularized wireless access network is a network composed of a large number of distributed, low-cost, and low-power wireless access points (APs). These APs perform simple physical layer functions such as wireless signal transmission and reception, channel estimation, downlink precoding, and uplink signal detection. Furthermore, different APs are connected to one or more central control devices via backhaul links. These central control devices perform complex physical layer functions such as AP data distribution and merging, signal modulation and demodulation, and information bit encoding and decoding, enabling all APs to jointly provide services to each terminal simultaneously. However, when all APs jointly provide services to terminals simultaneously, this results in high signaling overhead and computational complexity.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a wireless communication method and device, and a storage medium.

[0005] The wireless communication method provided in the embodiment of the present application includes:

[0006] The terminal device receives at least one first channel sent by a first access device set, where the first access device set includes at least one access device. The at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

[0007] The wireless communication method provided in the embodiment of the present application includes:

[0008] A first access device sends a first channel to a terminal device. The first access device belongs to a first access device set. The first access device set includes at least one access device. The at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set. The target access device set is used to communicate data with the terminal device.

[0009] The terminal device provided in the embodiment of the present application includes:

[0010] The first communication unit is configured to receive at least one first channel sent by a first access device set by a terminal device, wherein the first access device set includes at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

[0011] The first access point provided in this embodiment of the present application includes:

[0012] The second communication unit is configured to send a first channel to the terminal device, the first access device belongs to a first access device set, the first access device set includes at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

[0013] The communication device provided in an embodiment of the present application may be a terminal device or a first access point in the above-mentioned solution, and includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0014] The chip provided in the embodiment of the present application is used to implement the above-mentioned wireless communication method.

[0015] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned wireless communication method.

[0016] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned wireless communication method.

[0017] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned wireless communication method.

[0018] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned wireless communication method.

[0019] Through the above technical solution, the terminal device determines whether the first access device set is the target access device set for data communication with the terminal device based on at least one first channel sent by the received first access device set, thereby providing services to the terminal device based on the access device set, without all access devices providing services to the terminal device, while achieving better network scalability, reducing signaling overhead and lowering computational complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0022] FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0023] FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0024] FIG4 is a schematic diagram of an NTN scenario based on a transparent transmission satellite provided in an embodiment of the present application;

[0025] FIG5 is a schematic diagram of an NTN scenario based on a regenerative forwarding satellite according to an embodiment of the present application;

[0026] FIG6 is a schematic diagram of an optional structure of a de-cellularized wireless access network according to an embodiment of the present application;

[0027] FIG7 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0028] FIG8 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0029] FIG9 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0030] FIG10 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0031] FIG11 is a schematic diagram of an optional interaction flow of the first channel according to an embodiment of the present application;

[0032] FIG12 is a schematic diagram of an optional position of a third channel according to an embodiment of the present application;

[0033] FIG13 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0034] FIG14 is a schematic diagram of an optional position of a fourth channel according to an embodiment of the present application;

[0035] FIG15 is a schematic diagram of an optional structure of a candidate AP set according to an embodiment of the present application;

[0036] FIG16 is a schematic diagram of an optional structure of a terminal device according to an embodiment of the present application;

[0037] FIG17 is a schematic diagram of an optional structure of a first AP according to an embodiment of the present application;

[0038] FIG18 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0039] FIG19 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0040] Figure 20 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application.

[0043] As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0044] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, fifth generation (5G) communication system (also known as New Radio (NR) communication system), or future communication systems.

[0045] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 (e.g., user equipment (UE)) located within the coverage area.

[0046] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a gNB in ​​an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0047] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0048] For example, the terminal device 110 may refer to an access terminal, UE, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0049] The terminal device 110 can be used for device-to-device (D2D) communication.

[0050] The wireless communication system 100 may further include a core network device 130 for communicating with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions that can be implemented by SMF and PGW-C. During the network evolution process, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited in the embodiments of the present application.

[0051] The functional units in the communication system 100 may also establish connections and implement communication via next generation (NG) network interfaces.

[0052] For example, the terminal device establishes an air interface connection with the access network device through the Uu interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (referred to as N3); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (referred to as N2); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (referred to as N4); the UPF can exchange user plane data with the data network through the NG interface 6 (referred to as N6); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (referred to as N11); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (referred to as N7).

[0053] Figure 1 exemplarily shows a base station, a core network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple base stations and each base station may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0054] 3GPP is researching Non-Terrestrial Network (NTN) technology. NTNs typically use satellite communications to provide communications services to users on the ground. Compared to terrestrial cellular networks, satellite communications offer many unique advantages. First, satellite communications are not restricted by user location. For example, conventional terrestrial communications cannot cover areas such as oceans, high mountains, and deserts where communications equipment cannot be deployed or where there is a sparse population. However, satellite communications, because a single satellite can cover a large area and orbits the Earth, theoretically every corner of the globe can be covered. Second, satellite communications have significant social value. Satellite communications can provide low-cost coverage in remote mountainous areas and poor, underdeveloped countries and regions, enabling people in these areas to enjoy advanced voice communications and mobile internet technologies, helping to narrow the digital divide with developed regions and promoting their development. Third, satellite communications offer long range, and the cost of communications does not increase significantly with increasing distance. Finally, satellite communications are highly stable and unaffected by natural disasters.

[0055] NTN technology can be combined with various communication systems. For example, NTN technology can be combined with the NR system to form an NR-NTN system. Another example is that NTN technology can be combined with the Internet of Things (IoT) system to form an IoT-NTN system. IoT-NTN systems can include NB-IoT-NTN systems and eMTC-NTN systems.

[0056] FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0057] As shown in Figure 2, a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102. The network formed between the terminal device 1101 and the satellite 1102 can also be referred to as an NTN. In the architecture of the communication system shown in Figure 2, the satellite 1102 can have the function of a base station, and the terminal device 1101 and the satellite 1102 can communicate directly. In the system architecture, the satellite 1102 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and each network device 1102 may include a different number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0058] FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0059] As shown in Figure 3, it includes a terminal device 1201, a satellite 1202, and a base station 1203. Wireless communication can be carried out between the terminal device 1201 and the satellite 1202, and communication can be carried out between the satellite 1202 and the base station 1203. The network formed between the terminal device 1201, the satellite 1202, and the base station 1203 can also be referred to as an NTN. In the architecture of the communication system shown in Figure 3, the satellite 1202 may not have the function of a base station, and the communication between the terminal device 1201 and the base station 1203 needs to be transferred through the satellite 1202. In this system architecture, the base station 1203 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1203, and each network device 1203 may include a different number of terminal devices within its coverage area, which is not limited in the embodiments of the present application. The network device 1203 may be the network device 120 in Figure 1.

[0060] It should be understood that the satellites 1102 or 1202 include but are not limited to:

[0061] Satellites in Low-Earth Orbit (LEO), Medium-Earth Orbit (MEO), Geostationary Earth Orbit (GEO), and High Elliptical Orbit (HEO) orbits, among others, can use multiple beams to provide ground coverage. For example, a single satellite can form dozens or even hundreds of beams to cover the ground. In other words, a single satellite beam can cover a ground area tens to hundreds of kilometers in diameter, ensuring satellite coverage and increasing the capacity of the entire satellite communications system.

[0062] For example, LEO satellites can have an altitude range of 500 km to 1500 km, with an orbital period of approximately 1.5 to 2 hours. The signal propagation delay for single-hop communication between users is generally less than 20 milliseconds, and the maximum satellite visibility time is 20 minutes. LEO satellites have short signal propagation distances and low link loss, requiring low transmit power from user terminals. GEO satellites can have an orbital altitude of 35,786 km and a period of 24 hours around the Earth. The signal propagation delay for single-hop communication between users is generally 250 milliseconds.

[0063] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0064] Satellites can be categorized as either transparent payload or regenerative payload based on their functionality. Transparent payload satellites only provide radio frequency filtering, frequency conversion, and amplification, transparently forwarding signals without altering the waveform of the signal being forwarded. Regenerative payload satellites, in addition to providing radio frequency filtering, frequency conversion, and amplification, can also offer demodulation / decoding, routing / conversion, and encoding / modulation, embodying some or all of the functions of a base station.

[0065] In the NTN, one or more gateways may be included for communication between satellites and terminals.

[0066] FIG4 and FIG5 are schematic diagrams showing NTN scenarios based on transparent forwarding satellites and regenerative forwarding satellites, respectively.

[0067] As shown in Figure 4, for an NTN scenario based on transparent forwarding satellites, the gateway and satellite communicate via a feeder link, and the satellite and terminal can communicate via a service link. As shown in Figure 5, for an NTN scenario based on regenerative forwarding satellites, satellites communicate via inter-satellite links, the gateway and satellite communicate via a feeder link, and the satellite and terminal can communicate via a service link.

[0068] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0069] It should be noted that Figures 1 to 5 illustrate only the systems to which this application applies, and the methods described in the embodiments of this application are also applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exists simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship. It should also be understood that the term "indication" in the embodiments of this application can be direct, indirect, or indicate an associated relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an associated relationship. It should also be understood that the term "corresponding" in the embodiments of this application can mean that two objects have a direct or indirect correspondence relationship, an associated relationship, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit its specific implementation method. For example, predefined can refer to a definition in a protocol. It should also be understood that in the embodiments of the present application, the “protocol” can refer to a standard protocol in the field of communications, such as an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0070] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0071] Definition of Cell-free RAN

[0072] Decellularized wireless access network: As shown in Figure 6, it is a network composed of a large number of distributed low-cost and low-power wireless access devices, which can also be called APs. The APs can perform simple physical layer functions such as wireless signal transmission and reception, channel estimation, downlink precoding, and uplink signal detection. In addition, as shown in Figure 6, different APs are connected to one or more central processing devices (also called central processing units (CPUs)) via backhaul links. The CPUs can perform complex physical layer functions such as data distribution and merging, signal modulation and demodulation, and information bit encoding and decoding for the APs, thereby enabling all APs to jointly provide services to each terminal at the same time. As the number of APs increases, the influence of cell boundaries is gradually eliminated, forming the concept of a "decellularized" system, which significantly improves system capacity and spectrum efficiency.

[0073] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0074] The wireless communication method provided in an embodiment of the present application is shown in FIG7 and is applied to a terminal device, including:

[0075] S701. The terminal device receives at least one first channel sent by a first access device set, where the first access device set includes at least one access device. The at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, where the target access device set is used to communicate data with the terminal device.

[0076] The wireless communication method provided in an embodiment of the present application is shown in FIG8 and is applied to a first access device, including:

[0077] S801. A first access device sends a first channel to a terminal device. The first access device belongs to a first access device set. The first access device set includes at least one access device. The at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set. The target access device set is used to communicate data with the terminal device.

[0078] The wireless communication method shown in FIG. 7 or FIG. 8 is further described below.

[0079] In an embodiment of the present application, the access devices in the decellularized wireless access network are configured as at least two access device sets, namely AP sets, one AP set includes at least one AP, and the first AP set is any AP set of the at least two AP sets.

[0080] In embodiments of the present application, a central processing device can configure AP sets for APs in a decellularized wireless access network. In some embodiments, AP sets can be configured based on the distances between different APs. In one example, an AP set has a master AP, and APs within a first distance range from the master AP belong to the same AP set as the master AP.

[0081] The first AP sends a first channel, and the first AP belongs to a first AP set. In the case where the first AP sends the first channel, the first AP set sends at least one first channel to the terminal device, and the at least one first channel is used by the terminal device to determine whether the first AP set is the target AP set.

[0082] The first AP set includes at least one AP. The at least one first channel sent by the first AP set can be understood as at least one first channel sent by at least one AP in the first AP set, wherein one AP sends one first channel.

[0083] In an embodiment of the present application, the terminal device performs first channel detection. When the terminal device receives at least one first channel sent by an AP set, it can be considered that the terminal device receives at least one first channel sent by the first AP set.

[0084] In an embodiment of the present application, the terminal device can receive at least one first channel, that is, one or more first channels, sent by the first AP set.

[0085] In some embodiments, the manner in which the first AP set sends the at least one first channel includes one of the following:

[0086] Transmission mode 1: The master AP of the first AP set transmits the first channel;

[0087] Transmission mode 2: Each AP in a first number of APs in a first AP set transmits a first channel.

[0088] In transmission mode 1, the first channel sent by the first AP set includes only one first channel, and a master AP in the first AP set sends the first channel, and the terminal device receives the one first channel sent by the first AP set. In this case, the first AP is the master AP in the first AP set.

[0089] For transmission mode 2, the first channel sent by the first AP set includes a first number of first channels, where the first number is greater than 1 and less than or equal to a second number, and the second number is the number of APs included in the first AP set. The first number of APs in the first AP set that send the first channel includes a primary AP and at least one secondary AP in the first AP set, where the secondary AP is an AP other than the primary AP in the first AP set. The terminal device receives the first number of first channels sent by the first AP set. In this case, the first AP is any AP in the first AP set that sends the first channel.

[0090] In an embodiment of the present application, the first AP set may periodically send the first channel so that a terminal device within the coverage area of ​​the first AP set can receive the first channel.

[0091] It is understandable that each AP set in the cellular wireless access network periodically sends the first channel. For a terminal device, it can detect the first channel sent by one or more AP sets. Here, the AP set where the terminal device detects the first channel is called the first AP set.

[0092] After receiving the at least one first channel sent by the first AP set, the terminal device determines whether the first AP set can be used as a target AP set for data communication with the terminal device through the received at least one first channel.

[0093] The target AP set can be understood as the AP set that provides services for the terminal device. APs other than the target AP set in the cellular wireless network do not provide services for the terminal device.

[0094] In an embodiment of the present application, after determining the target AP set, the terminal device establishes an association relationship with the target AP set. The terminal device then establishes an association relationship with the APs in the target AP set, and the APs in the target AP set provide services to the terminal device after establishing an association with the terminal device.

[0095] In some embodiments, the services provided by the APs in the target AP set to the terminal device include at least one of the following simple physical layer functions: wireless signal transmission and reception, channel estimation, downlink precoding, and uplink signal detection. Furthermore, the APs in the target AP set are connected to one or more CPUs via a backhaul link to distribute or consolidate data sent or received by the APs in the target AP set to the terminal device, thereby enabling the APs in the target AP set to jointly provide services to the terminal device.

[0096] It is understandable that the terminal device can receive the first channel sent by at least one first AP set, wherein one first AP set sends at least one first channel.

[0097] If the terminal device receives a first channel sent by a first AP set, it determines whether the first AP set can be the target AP set corresponding to the terminal device.

[0098] If the terminal device receives the first channel sent by multiple first AP sets, it determines whether each first AP set in the multiple first AP sets can be the target AP set corresponding to the terminal device, or selects a first AP set that can be the target AP set from the multiple first AP sets.

[0099] In the wireless communication method provided in an embodiment of the present application, a terminal device determines whether the first AP set is a target AP set for data communication with the terminal device based on at least one first channel sent by the received first AP set, thereby providing services to the terminal device based on the AP set, without requiring all APs to provide services to the terminal device, thereby achieving better network scalability while reducing signaling overhead and computational complexity.

[0100] In some embodiments, the first receiving power is used to determine whether the first AP set is the target AP set, and the first receiving power is determined based on the receiving power of the first channel sent by the first AP set received by the terminal device.

[0101] It can be understood that if the first channel sent by the first AP set includes one first channel, the first receiving power is the receiving power of the first channel received by the terminal device; if the first channel sent by the first AP set includes multiple first channels, the first receiving power is based on the receiving power of each first channel in the multiple first channels, that is, multiple receiving powers are determined. In one example, the first receiving power is the maximum receiving power among the multiple receiving powers of the multiple first channels, and it can also be the receiving power after the weighted sum of the multiple receiving powers.

[0102] In some embodiments, if the first received power satisfies at least one of the following, the first AP set is determined to be the target AP set:

[0103] The first received power is greater than a received power threshold;

[0104] The first received power is a maximum value among multiple first received powers.

[0105] In one example, a terminal device receives a first channel of a first AP set. If a first receiving power of the first AP set is greater than a receiving power threshold, the first AP set is a target AP set.

[0106] In one example, the terminal device receives first channels of multiple first AP sets, then compares the first receiving powers of the multiple first AP sets, and determines the first AP set corresponding to the largest first receiving power as the target AP set.

[0107] In one example, the terminal device receives the first channels of multiple first AP sets, then compares the first receiving powers of the multiple first AP sets, and compares the first receiving powers of the multiple first AP sets with a receiving power threshold. When the largest first receiving power is greater than the receiving power threshold, the first AP set corresponding to the largest first receiving power is determined as the target AP set.

[0108] The wireless communication method provided in an embodiment of the present application determines whether the first AP set is a target AP set based on the first receiving power determined by the receiving power of the first channel of the first AP set. When the distance between the first AP set and the terminal device affects the first receiving power, it is determined that the first AP set can be used as the target AP set based on the distance between the first AP set and the terminal device, thereby determining the AP set that can provide high-quality services to the terminal device.

[0109] In some embodiments, the first channel carries a downlink synchronization signal, and the downlink synchronization signal is used for downlink synchronization between the terminal device and the AP set that sends the first channel.

[0110] When the first channel carries a downlink synchronization signal, if the terminal device determines a first AP set as a target AP set, the terminal device can perform downlink synchronization with the first AP set through the downlink synchronization signal carried by the first channel sent by the first AP set, thereby achieving downlink synchronization with the target AP set.

[0111] It can be understood that the downlink synchronization signal is used for time and frequency synchronization between the terminal device and the corresponding first AP set.

[0112] In some embodiments, downlink synchronization signals in the first channel sent by different AP sets are sent using different first pseudo-random sequences.

[0113] The first pseudo-random sequence used in the downlink synchronization signal of the first channel is used by the terminal device to identify the first AP set that sends the first channel.

[0114] It is understandable that when different APs in an AP set send the first channel, the first pseudo-random sequences used by the downlink synchronization signals carried by the first channels sent by the different APs are the same.

[0115] After receiving the first signal, the terminal device identifies the AP set that transmits the first channel using the first pseudo-random sequence used for the downlink synchronization signal in the first signal. The terminal device may detect the synchronization signal on the first channel using the first pseudo-random sequence corresponding to the AP set. If the synchronization signal is detected, the terminal device determines that the first channel transmitted by the first AP set has been received.

[0116] In one example, the first pseudo-random sequence corresponding to AP set 1 is sequence A, and the first pseudo-random sequence corresponding to AP set 2 is sequence B. When the terminal device detects the downlink synchronization signal carried by the first channel, it uses sequence A and sequence B to detect the downlink synchronization signal. If the downlink synchronization signal is detected through sequence A, it is determined that the downlink synchronization signal sent by AP set 1 is received; if the downlink synchronization signal is detected through sequence A and sequence B, it is determined that the downlink synchronization signals sent by AP set 1 and AP set 2 (including downlink synchronization signal 1 of AP set 1 and downlink synchronization signal 2 sent by AP set 2) are received, and sequence A and sequence B are used to distinguish the downlink synchronization signal 1 of AP set 1 and the downlink synchronization signal 2 sent by AP set 2.

[0117] In the embodiment of the present application, the first pseudo-random sequence includes an m-sequence, a Gold sequence, or other pseudo-random sequence with good autocorrelation and cross-correlation characteristics.

[0118] In some embodiments, the first channel carries at least one of the following:

[0119] first indication information, where the first indication information indicates a location of a first resource, where the first resource is a resource occupied by transmission of the first channel, and the location of the first resource is used for time domain positioning and / or frequency domain positioning;

[0120] second indication information, where the second indication information indicates a second resource, where the second resource is a resource occupied by transmission of a second channel, and the second channel is a wireless channel subsequent to the first channel;

[0121] First information, where the first information is used by the terminal device to determine a first timing advance TA.

[0122] The first indication information may indicate a first time domain position and / or a first frequency domain position, where the first time domain position is the time domain position of the first resource, and the first frequency domain position is the frequency domain position of the first resource. The first time domain position is used for time domain positioning of the terminal device, and the second time domain position is used for frequency domain positioning of the terminal.

[0123] Time domain positioning can be understood as establishing the relationship between time and time domain units. The time domain unit includes at least one of the following: frame, subframe, time slot, symbol. The terminal device determines a time domain unit corresponding to a time through time domain positioning.

[0124] Frequency domain positioning can be understood as establishing the relationship between frequency points and frequency domain units. Frequency domain units include at least one of the following: scheduling blocks (SBs), resource blocks (RBs), and resource elements (REs). The terminal device determines the frequency domain unit corresponding to a frequency point through frequency domain positioning.

[0125] The second indication information is used to indicate the location and / or size of the second resource. If the second indication information indicates the location of the second resource, the second indication information may directly indicate the location of the second resource or may indicate an offset, where the offset is an offset of the location of the second resource relative to a reference channel in the time domain and / or frequency domain.

[0126] In an embodiment of the present application, the second channel may include at least one of the following: a third channel, a fourth channel, a fifth channel, and a sixth channel. Accordingly, the second resource includes at least one of the following: a third resource occupied by transmission of the third channel, a fourth resource occupied by transmission of the fourth channel, a fifth resource occupied by transmission of the fifth channel, and a sixth resource occupied by transmission of the sixth channel. The third channel is a channel sent by a terminal device to a target AP set for requesting association with a target AP set. The fourth channel is a channel sent by a first AP set or a target AP set to a terminal device for carrying first random access configuration information, wherein the first random access configuration information is configuration information of a random access process for a terminal device to access the first AP set. The fifth channel is used to schedule the fourth resource. The sixth channel is used to indicate the fifth resource.

[0127] It can be understood that a resource may include the location of the resource in the time domain, i.e., the time domain resource, and the location of the resource in the frequency domain, i.e., the frequency domain resource.

[0128] For a resource in the second resources, the second indication information may indicate the position of the resource in the time domain and / or frequency domain, that is, indicate the time domain resources and / or frequency domain resources included in the resource.

[0129] It should be noted that the multiple channels included in the second channel can be combined without conflict.

[0130] In one example, the second channel includes a third channel and a fourth channel. In this case, the second indication information indicates the time domain position and frequency domain position of the third resource, and the time domain position and frequency domain position of the fourth resource.

[0131] In one example, the second channel includes a third channel and a fifth channel. At this time, the second indication information indicates the time domain position and frequency domain position of the third resource, as well as the time domain position and frequency domain position of the fifth resource, and the fifth channel schedules the time domain position and frequency domain position of the fourth resource.

[0132] In one example, the second channel includes the sixth channel. At this time, the second indication information indicates the time domain position and frequency domain position of the sixth resource. At this time, the terminal device determines the time domain position and frequency domain position of the fifth resource based on the sixth channel, and the fifth channel transmitted on the fifth resource schedules the time domain position and frequency domain position of the fourth resource.

[0133] In one example, the second channel includes a third channel, a fourth channel, a fifth channel and a sixth channel. At this time, the second indication information indicates: the time domain position and frequency domain position of the third resource, the time domain position of the fourth resource, the frequency domain position of the fifth resource, the time domain position and frequency domain position of the sixth resource, wherein the terminal device receives the sixth channel based on the sixth resource, the sixth channel indicates the frequency domain position of the fifth resource, the terminal device receives the fifth channel based on the fifth resource, and the fifth channel schedules the frequency domain position of the fourth resource.

[0134] It should be noted that, when the time domain resource or the frequency domain resource of a second resource is not specified, the second resource includes the time domain resource and the frequency domain resource.

[0135] The first information is used to determine a first TA, which can be understood as an open-loop TA. The open-loop TA can be used for uplink time domain synchronization of a terminal device in an NTN scenario, thereby adjusting the sending time of uplink transmission in the NTN scenario.

[0136] The first information may include at least one of the following: satellite ephemeris information and public TA information.

[0137] In the embodiment of the present application, if the wireless communication method provided in the embodiment of the present application is applied to NTN, the first channel carries the first information; otherwise, the first channel may not carry the first information.

[0138] In some embodiments, if the first AP set is determined to be the target AP set, the method shown in FIG7 further includes:

[0139] The terminal device sends a third channel to the first AP set, where the third channel is used to establish an association between the terminal device and the first AP set.

[0140] In some embodiments, if the first AP set is determined to be the target AP set, the method shown in FIG8 further includes:

[0141] The first AP receives a third channel sent by the terminal device, where the third channel is used to establish an association between the terminal device and the first AP set.

[0142] When the terminal device determines that the first AP set is the target AP based on the first channel sent by the first AP set, the terminal device sends a third channel to the first AP set. In some embodiments, the third channel may be a physical random access channel (PRACH).

[0143] The terminal device establishes an association relationship with the first AP set, making the first AP set the target AP set.

[0144] In an embodiment of the present application, the terminal device establishes an association relationship with the first AP set, and each AP in the first AP set establishes an association relationship with the terminal device, so that each AP in the first AP set can provide services to the terminal device.

[0145] If the sending mode of the first channel is sending mode one, the terminal device sends a third channel to the main AP of the first AP set or each AP in the first AP set. At this time, the main AP or each AP in the first AP set receives a third channel, and the first AP set establishes an association relationship with the terminal device based on the received third channel.

[0146] If the sending mode of the first channel is sending mode two, the terminal device sends a third channel to an AP in the first AP set. At this time, each AP in the first AP set receives a third channel respectively, and each AP in the first AP set establishes an association relationship with the terminal device based on the received third channel, thereby realizing the establishment of an association relationship between the first AP set and the terminal device.

[0147] In an embodiment of the present application, the first AP set can establish an association relationship with the terminal device through a random access process.

[0148] In some embodiments, the third channel carries an uplink synchronization signal, and the uplink synchronization signal is used for uplink synchronization between the terminal device and the target AP set.

[0149] The third channel may be transmitted using a second pseudo-random sequence. The terminal device may use the second pseudo-random sequence to transmit the third channel. After the first AP set transmits the first channel, it may use the second pseudo-random sequence for correlation detection. If the presence of the third channel is detected using the second pseudo-random sequence, uplink time synchronization may be achieved for the terminal transmitting the third channel.

[0150] In some embodiments, the third resource occupied by the third channel transmission is determined based on at least one of the following:

[0151] Factor 3A, a first resource, and a first offset, where the first resource is a resource occupied by transmission of the first channel, and the first offset is an offset of the third resource relative to the first resource in the time domain and / or frequency domain;

[0152] Factor 3B, third indication information, where the third indication information is used to indicate the position and / or size of the third resource in the frequency domain and / or time domain.

[0153] For factor 3A, if the first offset is the offset of the third resource relative to the first resource in the time domain, then the first offset is the first time domain offset; if the first offset is the offset of the third resource relative to the first resource in the frequency domain, then the first offset is the first frequency domain offset; if the first offset is the offset of the third resource relative to the first resource in the time domain and the frequency domain, then the first offset includes the first time domain offset and the first frequency domain offset. The third time domain position is obtained by offsetting the first time domain offset relative to the first time domain position, and the third frequency domain position is obtained by offsetting the first frequency domain offset relative to the first frequency domain position. The third time domain position is the position of the third resource in the time domain, and the third frequency domain position is the position of the third resource in the frequency domain.

[0154] It should be noted that, in the embodiment of the present application, the unit of the offset in the time domain is the time domain unit, and the unit of the offset in the frequency domain is the frequency domain unit.

[0155] The determination of third resources includes the following four items:

[0156] A third time domain position, where the third time domain position is a position of the third resource in the time domain;

[0157] A third frequency domain position, where the third frequency domain position is a position of the third resource in the frequency domain;

[0158] A third time domain size, where the third time domain size is the size of the third resource in the time domain;

[0159] The third frequency domain size is the size of the third resource in the frequency domain.

[0160] The above four items of the third resource can be determined based on one or more factors of Factor 3A and Factor 3B when Factor 3A and Factor 3B do not conflict with each other.

[0161] For the third time domain resource and the third frequency domain resource, a combination of the first offset and the first resource and / or the third indication information is used to determine a third time domain position and a third frequency domain position.

[0162] In one example, the first offset and the first resource are used to determine a third time domain position and a third frequency domain position.

[0163] In one example, the third indication information is used to determine a third time domain position and a third frequency domain position.

[0164] In one example, the first offset and the first resource are used to determine a third time domain position, and the third indication information is used to determine a third frequency domain position.

[0165] In one example, the first offset and the first resource are used to determine a third frequency domain position, and the third indication information is used to determine a third time domain position.

[0166] Assume that the first offset and the first resource are used to determine the third time domain position and the third frequency domain position, the first offset includes the first time domain offset and the first frequency domain offset, and the terminal device determines the position of the third resource based on the first offset and the first resource, wherein the terminal device determines the third time domain position based on the first time domain offset and the position of the first resource in the time domain, that is, the first time domain position, and the terminal device determines the third frequency domain position based on the first frequency domain offset and the position of the first resource in the frequency domain, that is, the first frequency domain position.

[0167] Assuming that the third indication information is used to determine a third time domain position and a third frequency domain position, the terminal device determines the position of the third resource based on the third indication information.

[0168] Assuming that the first offset and the first resource are used to determine the third time domain position, and the third indication information is used to determine the third frequency domain position, the terminal device determines the third time domain position based on the first time domain offset and the first time domain position, and determines the third frequency domain position based on the third indication information.

[0169] Assuming that the first offset and the first resource are used to determine the third frequency domain position, and the third indication information is used to determine the third time domain position, the terminal device determines the third frequency domain position based on the first frequency domain offset and the first frequency domain position, and determines the third time domain position based on the third indication information.

[0170] The third time domain size may be the set first size or indicated by third indication information.

[0171] The third frequency domain size may be the set second size or indicated by third indication information.

[0172] In an embodiment of the present application, different methods for determining the third time domain position and the third frequency domain position of the third resource and different methods for determining the size of the third resource in the time domain and the frequency domain can be combined with each other without conflict.

[0173] In one example, the third time domain position is determined based on the first time domain position and the first time domain offset, the third frequency domain position is determined based on the third indication information, the size of the third resource in the time domain is the set first size, and the size of the third resource in the frequency domain is indicated by the third indication information.

[0174] In one example, the third time domain resource, the third frequency domain resource, and the size of the third resource in the time domain and the frequency domain are indicated by third indication information.

[0175] In one example, the third time domain position is determined based on the first time domain position and the first time domain offset, and the third frequency domain position is determined based on the first frequency domain position and the first frequency domain offset. The size of the third resource in the time domain is the first size, and the size of the third resource in the frequency domain is the second size.

[0176] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0177] the first offset;

[0178] The third indication information.

[0179] In some embodiments, based on the wireless communication method shown in FIG7 , the method further includes:

[0180] The terminal device receives a fourth channel sent by the first AP set, where the fourth channel is used to carry first random access configuration information corresponding to the first AP set, and the first random access configuration information is used by the terminal device to access the first AP set through a random access process.

[0181] In some embodiments, based on the wireless communication method shown in FIG7 , the method further includes:

[0182] The first AP sends a fourth channel to the terminal device, where the fourth channel is used to carry first random access configuration information corresponding to the first AP set, and the first random access configuration information is used for the random access process of the terminal device accessing the first AP set.

[0183] The sending method of the fourth channel can refer to the sending method of the first channel, and will not be repeated here.

[0184] The fourth channel may be a physical downlink shared channel (PDSCH).

[0185] After receiving the fourth channel sent by the first AP set, the terminal device performs a random access process for accessing the first AP set based on the first random access configuration information carried by the fourth channel, thereby associating with the first AP set.

[0186] In the embodiment of the present application, the first random access process configuration message is a cell-level system message and is not targeted at the current terminal device.

[0187] In some embodiments, the first random access configuration information includes at least one of the following:

[0188] A first frequency range, where the first frequency range is a frequency range in which downlink channel transmission occurs during a random access process;

[0189] The second frequency range is a frequency range in which uplink channel transmission occurs during a random access process.

[0190] For the terminal device, the terminal device sends an uplink channel transmission in a random access process to the first AP set based on the first frequency range; and receives a downlink channel transmission sent by the first AP set based on the first frequency range.

[0191] For the first AP set, the first AP set receives uplink channel transmission of the random access process in the second frequency range, and sends downlink channel transmission of the random access process to the terminal device based on the first frequency range.

[0192] For different first AP sets, the first random access process configuration information sent to the terminal device through the fourth channel is different.

[0193] In some embodiments, the fourth channel is further used to carry at least one of the following:

[0194] Fourth indication information, where the fourth indication information is used to indicate a time domain position of a fourth resource, where the fourth resource is a resource occupied by transmission of the fourth channel, and the time domain position of the fourth resource is used for time domain positioning;

[0195] First information, where the first information is used by the terminal device to determine a first TA;

[0196] Random Access Response (RAR) message.

[0197] In the embodiments of the present application, only one piece of information indicating the same function or purpose can be configured, eliminating the need for repeated configuration. For example, either the first channel or the fourth channel can carry the first information. Another example is that either the first channel or the fourth channel can carry information for time-domain positioning. For the sake of simplicity, detailed examples will not be provided below.

[0198] The RAR message may carry at least one of the following information: a second TA, uplink grant scheduling information, and a temporary identifier used in the random access process. The second TA is a TA for the terminal device and can be understood as a closed-loop TA.

[0199] In an embodiment of the present application, if the terminal device is applied to a non-NTN network, the terminal device performs timing advance based on the second TA; if the terminal device is applied to an NTN network, the terminal device performs timing advance based on the first TA and the second TA jointly to adjust the sending time of the uplink transmission.

[0200] In some embodiments, the first TA is used to adjust a sending time of a first uplink transmission, where the first uplink transmission is an uplink transmission after receiving the first information.

[0201] If the first information is carried in the first channel, the channels on which the first TA acts include the fourth channel and uplink transmission in the random access process.

[0202] If the first information is carried in the fourth channel, the information affected by the first TA includes uplink transmission in the random access process.

[0203] In some embodiments, the reception of the fourth channel precedes the sending of the third channel, the third channel is a channel sent by the terminal device to the first AP set when the first AP set is determined to be the target AP set, and the third channel is used for the terminal device to establish an association relationship with the target AP set; or,

[0204] The transmission of the third channel precedes the reception of the fourth channel.

[0205] If the fourth channel is received before the third channel is sent, the first AP set sends the fourth channel to the terminal device after sending the first channel, and each of the multiple first AP sets sends the fourth channel carrying the corresponding first random access process configuration information. At this time, the terminal device attempts to receive the fourth channel sent by the first AP set. For the first AP set, the first AP set is not sure whether it is the target AP set and attempts to send the first random access process configuration information to the terminal device.

[0206] At this time, multiple first AP sets include AP set 1 and AP set 2. After AP set 1 and AP set 2 send the first channel to the terminal device, as shown in Figure 9, AP set 1 and AP set 2 respectively send the fourth channel to the terminal device. When the terminal device determines that AP set 1 is the target AP set, it sends the third channel to AP set 1 to achieve uplink synchronization between the terminal device and AP set 1.

[0207] If the fourth channel is received after the third channel is sent, then after the first AP set sends the first channel, the terminal device determines the first AP set as the target AP set based on the received first channel, and sends the third channel to the first AP set determined as the target AP set. The first AP set determined as the target AP set sends the fourth channel to the terminal device. At this time, the AP set that determines itself as the target A set sends the fourth channel to the terminal device to provide its own first random access process configuration information. The terminal device only receives the fourth channel sent by the first AP set determined as the target AP set. This avoids unnecessary channel transmission.

[0208] Based on the AP set shown in Figure 10, after AP set 1 and AP set 2 send the first channel to the terminal device, the terminal device sends the third channel to AP set 1 as described in Figure 9 when determining that AP set 1 is the target AP set. AP set 1 sends the fourth channel to the terminal device based on the received third channel to achieve uplink synchronization between the terminal device and AP set 1.

[0209] In some embodiments, the fourth resource occupied by the transmission of the fourth channel is determined based on at least one of the following:

[0210] Factor 4A, a first resource and a second offset, where the first resource is a resource occupied by transmission of the first channel, and the second offset is an offset of the fourth resource relative to the first resource in the time domain and / or frequency domain;

[0211] Factor 4B, a third resource and a third offset, where the third resource is a resource occupied by transmission of a third channel before the fourth channel, and the third offset is an offset of the fourth resource relative to the third resource in the time domain and / or frequency domain;

[0212] Factor 4C, fifth indication information, where the fifth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0213] Factor 4D, a fifth channel, the fifth channel is used to schedule the fourth channel.

[0214] For factor 4A, if the second offset is the offset of the fourth resource relative to the first resource in the time domain, then the second offset is the second time domain offset; if the second offset is the offset of the fourth resource relative to the first resource in the frequency domain, then the second offset is the second frequency domain offset; if the second offset is the offset of the fourth resource relative to the first resource in both the time and frequency domains, then the second offset includes the second time domain offset and the second frequency domain offset. The fourth time domain position is obtained by offsetting the second time domain offset relative to the first time domain position, and the fourth frequency domain position is obtained by offsetting the second frequency domain offset relative to the first frequency domain position. The fourth time domain position is the position of the fourth resource in the time domain, and the fourth frequency domain position is the position of the fourth resource in the frequency domain.

[0215] For factor 4B, if the third offset is the offset of the fourth resource relative to the third resource in the time domain, then the third offset is a third time domain offset; if the third offset is the offset of the fourth resource relative to the third resource in the frequency domain, then the third offset is a third frequency domain offset; if the third offset is the offset of the fourth resource relative to the third resource in both the time domain and the frequency domain, then the third offset includes a third time domain offset and a third frequency domain offset. The fourth time domain position is obtained by offsetting the third time domain offset relative to the third time domain position, and the fourth frequency domain position is obtained by offsetting the third frequency domain offset relative to the third frequency domain position. The third time domain position is the position of the third resource in the time domain, and the third frequency domain position is the position of the third resource in the frequency domain.

[0216] For factor 4D, the fifth channel is a downlink transmission channel that precedes the fourth channel, for example, PDCCH.

[0217] In the embodiment of the present application, determining the fourth resource includes determining the following four items:

[0218] a fourth time domain position, where the fourth time domain position is a position of the fourth resource in the time domain;

[0219] a fourth frequency domain position, where the fourth frequency domain position is a position of a fourth resource in the frequency domain;

[0220] a fourth time domain size, where the fourth time domain size is the size of the fourth resource in the time domain;

[0221] The fourth frequency domain size is the size of the fourth resource in the frequency domain.

[0222] The above four items of the fourth resource can be determined based on one or more of factors 4A, 4B, 4C, and 4D when factors 4A, 4B, 4C, and 4D do not conflict with each other.

[0223] In one example, the fourth time domain position, the fourth frequency domain position, the fourth time domain size, and the fourth frequency domain size are indicated by fifth indication information.

[0224] In one example, the fourth time domain position, the fourth frequency domain position, the fourth time domain size, and the fourth frequency domain size are scheduled by the fifth channel.

[0225] In one example, the fourth time domain position is determined based on the first time domain position and the second time domain offset, the fourth frequency domain position is determined based on the third time domain position and the third frequency domain position, the fourth time domain size is indicated by the fifth indication information, and the fourth frequency domain size is scheduled by the fifth channel.

[0226] In one example, the fourth time domain position is determined based on the first time domain position and the second time domain offset, the fourth frequency domain position is determined based on the first time domain position and the second frequency domain position, and the fourth time domain size and the fourth frequency domain size are determined by fifth indication information.

[0227] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0228] the second offset;

[0229] the third offset;

[0230] The fifth indication information.

[0231] In some embodiments, the fifth channel includes at least one of the following:

[0232] Sixth indication information, where the sixth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0233] A fourth offset, where the fourth offset is an offset of the fourth resource relative to the fifth resource occupied by the transmission of the fifth channel in the time domain and / or frequency domain.

[0234] When scheduling the fourth resource, the fifth channel can schedule at least one of the four contents of the fourth resource, and the fifth channel can directly indicate the content to be scheduled based on the sixth indication information, or indicate the content to be scheduled by means of the fourth offset.

[0235] The fourth offset includes a fourth time domain offset and / or a fourth frequency domain offset. The fourth time domain offset is the offset of the fourth time domain position relative to the fifth time domain position, that is, the offset of the fourth resource relative to the fifth resource in the time domain; the fourth frequency domain offset is the offset of the fourth frequency domain position relative to the fifth frequency domain position, that is, the offset of the fourth resource relative to the fifth resource in the frequency domain. The fifth time domain position is the position of the fifth resource in the time domain, and the fifth frequency domain position is the position of the fifth resource in the frequency domain.

[0236] In some embodiments, the fifth resource occupied by the transmission of the fifth channel is determined based on at least one of the following:

[0237] Factor 5A, the first resource, and a fifth offset, where the fifth offset is an offset of the fifth resource relative to the first resource in the time domain and / or frequency domain;

[0238] Factor 5B, the third resource, and a sixth offset, where the sixth offset is an offset of the fifth resource relative to the third resource in the time domain and / or frequency domain;

[0239] Factor 5C, seventh indication information, where the seventh indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0240] Factor 5D, a sixth channel, where the sixth channel is used to indicate the position and / or size of the fifth resource in the time domain and / or frequency domain.

[0241] For factor 5A, if the fifth offset is the offset of the fifth resource relative to the first resource in the time domain, then the fifth offset is the fifth time domain offset; if the fifth offset is the offset of the fifth resource relative to the first resource in the frequency domain, then the fifth offset is the fifth frequency domain offset; if the fifth offset is the offset of the fifth resource relative to the first resource in both the time domain and the frequency domain, then the fifth offset includes the fifth time domain offset and the fifth frequency domain offset. The fifth time domain position is obtained by offsetting the first time domain position by the fifth time domain offset, and the fifth frequency domain position is obtained by offsetting the first frequency domain position by the fifth frequency domain offset. The fifth time domain position is the position of the fifth resource in the time domain, and the fifth frequency domain position is the position of the fifth resource in the frequency domain.

[0242] For factor 5B, if the sixth offset is the offset of the fifth resource relative to the third resource in the time domain, then the sixth offset is the sixth time domain offset; if the sixth offset is the offset of the fifth resource relative to the third resource in the frequency domain, then the sixth offset is the sixth frequency domain offset; if the sixth offset is the offset of the fifth resource relative to the third resource in both the time domain and the frequency domain, then the sixth offset includes the sixth time domain offset and the sixth frequency domain offset. The fifth time domain position is obtained by offsetting the third time domain position by the sixth time domain offset, and the fifth frequency domain position is obtained by offsetting the third frequency domain position by the sixth frequency domain offset.

[0243] For factor 5D, the sixth channel is a downlink transmission channel that precedes the fifth channel, for example, PBCH.

[0244] In the embodiment of the present application, determining the fifth resource includes determining the following four items:

[0245] a fifth time domain position, where the fifth time domain position is a position of the fifth resource in the time domain;

[0246] A fifth frequency domain position, where the fifth frequency domain position is a position of the fifth resource in the frequency domain;

[0247] a fifth time domain size, where the fifth time domain size is the size of the fifth resource in the time domain;

[0248] The fifth frequency domain size is the size of the fifth resource in the frequency domain.

[0249] The above four items of the fifth resource can be determined based on one or more of factors 5A, 5B, 5C, and 5D when factors 5A, 5B, 5C, and 5D do not conflict with each other.

[0250] In one example, the fifth time domain position, the fifth frequency domain position, the fifth time domain size, and the fifth frequency domain size are indicated by seventh indication information.

[0251] In one example, the fifth time domain position, the fifth frequency domain position, the fifth time domain size, and the fifth frequency domain size are indicated by a sixth channel.

[0252] In one example, the fifth time domain position is determined based on the first time domain position and the fifth time domain offset, the fifth frequency domain position is determined based on the third time domain position and the sixth frequency domain position, the fifth time domain size is indicated by the seventh indication information, and the fifth frequency domain size is indicated by the sixth channel.

[0253] In one example, the fifth time domain position is determined based on the first time domain position and the fifth time domain offset, the fifth frequency domain position is determined based on the first time domain position and the fifth frequency domain position, and the fifth time domain size and the fifth frequency domain size are determined by the seventh indication information.

[0254] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0255] the fifth offset;

[0256] the sixth offset;

[0257] Seventh instruction information.

[0258] In some embodiments, the sixth channel includes at least one of the following:

[0259] Eighth indication information, where the eighth indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0260] a seventh offset, where the seventh offset is an offset of the fifth resource relative to the sixth resource occupied by transmission of the sixth channel in the time domain and / or frequency domain;

[0261] Ninth indication information, the ninth indication information is used to indicate the position of the sixth resource, and the position of the sixth resource is used for time domain positioning and / or frequency domain positioning.

[0262] When indicating the fifth resource, the sixth channel can indicate at least one of the four contents of the fifth resource, and the sixth channel can directly indicate the content to be scheduled based on the eighth indication information, or indicate the content to be scheduled by means of the seventh offset.

[0263] The seventh offset includes a seventh time domain offset and / or a seventh frequency domain offset. The seventh time domain offset is the offset of the fifth time domain position relative to the sixth time domain position, that is, the offset of the fifth resource relative to the sixth resource in the time domain; the seventh frequency domain offset is the offset of the fifth frequency domain position relative to the sixth frequency domain position, that is, the offset of the fifth resource relative to the sixth resource in the frequency domain. The sixth time domain position is the position of the sixth resource in the time domain, and the sixth frequency domain position is the position of the sixth resource in the frequency domain.

[0264] In an embodiment of the present application, if the terminal device receives the sixth channel, the terminal device may perform frequency domain positioning and / or time domain positioning based on any one of the first channel and the sixth channel. In an embodiment of the present application, if the terminal device does not receive the sixth channel, the terminal device may perform time domain positioning based on any one of the first channel and the fourth channel, and perform frequency domain positioning based on the first channel.

[0265] In some embodiments, the sixth resource occupied by the transmission of the sixth channel is determined based on at least one of the following:

[0266] Factor 6A, the first resource, and an eighth offset, where the eighth offset is an offset of the sixth resource relative to the first resource in the time domain and / or frequency domain;

[0267] Factor 6B, the third resource, and a ninth offset, where the ninth offset is an offset of the sixth resource relative to the third resource in the time domain and / or frequency domain;

[0268] Factor 6C, tenth indication information, the tenth indication information is used to indicate the position and / or size of the sixth resource in the time domain and / or frequency domain.

[0269] For factor 6A, if the eighth offset is the offset of the sixth resource relative to the first resource in the time domain, then the eighth offset is the eighth time domain offset; if the eighth offset is the offset of the sixth resource relative to the first resource in the frequency domain, then the eighth offset is the eighth frequency domain offset; if the eighth offset is the offset of the sixth resource relative to the first resource in the time domain and the frequency domain, then the eighth offset includes the eighth time domain offset and the eighth frequency domain offset. The sixth time domain position is obtained by offsetting the eighth time domain offset relative to the first time domain position, and the sixth frequency domain position is obtained by offsetting the eighth frequency domain offset relative to the first frequency domain position. The sixth time domain position is the position of the sixth resource in the time domain, and the sixth frequency domain position is the position of the sixth resource in the frequency domain.

[0270] For factor 6B, if the ninth offset is the offset of the sixth resource relative to the third resource in the time domain, then the ninth offset is the ninth time domain offset; if the ninth offset is the offset of the sixth resource relative to the third resource in the frequency domain, then the ninth offset is the ninth frequency domain offset; if the ninth offset is the offset of the sixth resource relative to the third resource in both the time domain and the frequency domain, then the ninth offset includes the ninth time domain offset and the ninth frequency domain offset. The sixth time domain position is obtained by offsetting the third time domain position by the ninth time domain offset, and the sixth frequency domain position is obtained by offsetting the third frequency domain position by the ninth frequency domain offset.

[0271] In the embodiment of the present application, determining the sixth resource includes determining the following four items:

[0272] a sixth time domain position, where the sixth time domain position is a position of a sixth resource in the time domain;

[0273] a sixth frequency domain position, where the sixth frequency domain position is a position of a sixth resource in the frequency domain;

[0274] a sixth time domain size, where the sixth time domain size is the size of the sixth resource in the time domain;

[0275] The sixth frequency domain size is the size of the sixth resource in the frequency domain.

[0276] The above four items of the sixth resource can be determined based on one or more of factors 6A, 6B, and 6C when factors 6A, 6B, and 6C do not conflict with each other.

[0277] In one example, the sixth time domain position, the sixth frequency domain position, the sixth time domain size, and the sixth frequency domain size are indicated by tenth indication information.

[0278] In one example, the sixth time domain position is determined based on the first time domain position and the eighth time domain offset, the sixth frequency domain position is determined based on the third frequency domain position and the ninth frequency domain offset, and the sixth time domain size and the sixth frequency domain size are indicated by the seventh indication information.

[0279] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0280] the eighth offset;

[0281] the ninth offset;

[0282] The tenth indication information.

[0283] In the embodiment of the present application, the target AP set is established through the interaction of the first channel, the third channel and the fourth channel between the terminal device and the first AP set.

[0284] In the embodiment of the present application, at least one of the following can be implemented:

[0285] The terminal device receives a first channel transmitted by a first AP set, determines that the first AP set is a target AP set based on the first channel transmitted by the first AP set, and then transmits a third channel to the first AP set. The terminal device determines a fourth resource, and thereby receives a fourth channel transmitted by the first AP set on the fourth resource. After receiving the fourth channel, the terminal device performs a random access process based on the first random access process configuration information corresponding to the first AP set carried on the fourth channel to access the first AP set, thereby achieving association with the first AP set as the target AP set, and the APs in the first AP set jointly provide services for the terminal device.

[0286] The manner in which the terminal device determines the fourth resource includes but is not limited to the following manners:

[0287] Mode 1: determining the fourth resource based on the second offset or the third offset carried by the first channel;

[0288] Mode 2: determining the fifth resource based on the fifth offset or the sixth offset carried by the first channel, and scheduling the fourth resource using the fifth channel received by the terminal device on the fifth resource;

[0289] Method 3: The sixth resource is determined based on the eighth offset or the ninth offset carried by the first channel, the sixth channel received by the terminal device on the sixth resource indicates the fifth resource, and the fifth channel received by the terminal device on the fifth resource schedules the fourth resource.

[0290] In this embodiment of the present application, if the terminal device determines that the first AP set is the target AP set, the terminal device performs the following processing:

[0291] In some embodiments, the terminal device sends or receives a seventh channel, and the seventh channel is used to update the APs included in the target AP set.

[0292] At this time, the first AP receives or sends a seventh channel, and the seventh channel is used to update the APs included in the target AP set.

[0293] The seventh channel can be understood as a channel through which the terminal device performs channel measurement on the first AP or the first AP performs channel measurement on the terminal device.

[0294] Here, the APs in the target AP set currently associated with the terminal device are updated, resulting in changes to the APs included in the target AP set. When updating the target AP set, an AP-level update is performed. In one example, the target AP set includes: AP1, AP2, AP3, and AP4. The updated target AP set may include the following:

[0295] Case 1, AP1, AP2, AP3, AP4, AP5;

[0296] Case 2, AP1, AP2, AP3;

[0297] Case 3, AP1, AP3, AP6;

[0298] Case 4, AP5, AP6, AP7.

[0299] It should be noted that when an AP set is a target AP set associated with a terminal device, for the terminal device, the APs included in the target AP set may change, but for the configuration of the AP set, the APs included in the first AP set remain unchanged.

[0300] In some embodiments, updating the APs included in the target AP set includes:

[0301] The terminal device measures the APs in the candidate AP set or the APs in the candidate AP set measure the terminal device, and updates the target AP set based on the measurement results, where the candidate AP set includes the APs in the first AP set.

[0302] It can be understood that the measurement results corresponding to the candidate APs in the candidate AP set are used to update the target AP set, and the candidate AP set includes the APs in the first AP set.

[0303] The candidate APs in the candidate AP set all need to receive or send the seventh channel.

[0304] The measurement results corresponding to the candidate APs in the candidate AP set are the measurement results of the terminal device measuring the candidate APs in the candidate AP set or the measurement results of the candidate AP measuring the terminal device.

[0305] Here, the CPU may determine a candidate AP set based on the first AP set, where the candidate AP set includes APs in the first AP set. The terminal device may measure the candidate APs in the candidate AP set, or the candidate APs may measure the terminal device to obtain measurement results corresponding to the candidate APs. For a candidate AP, the CPU may determine whether the candidate AP is an AP in the target AP set based on the measurement results corresponding to the candidate AP.

[0306] In an example, the first AP set includes: AP1, AP2, AP3, and AP4, and the candidate AP set may include: AP1, AP2, AP3, AP4, AP5, AP6, AP7, and AP8.

[0307] In some embodiments, the measurement result includes at least one of the following:

[0308] Reference signal received power RSRP;

[0309] Signal to Interference and Noise Ratio SINR.

[0310] In some embodiments, for a candidate AP in the candidate AP set, the seventh channel includes at least one of the following:

[0311] Uplink measurement channel;

[0312] Downlink measurement channel.

[0313] For the uplink measurement channel, the terminal device sends the uplink measurement channel to the candidate APs in the candidate AP set, and the CPU determines the associated AP in the target AP set based on the measurement results of each candidate AP in the candidate AP set.

[0314] For the downlink measurement channel, the CPU determines each candidate AP in the candidate AP set, each candidate AP in the candidate AP set sends a downlink measurement channel to the terminal device, the terminal device measures the received downlink measurement channel to obtain a measurement result, and determines the associated AP in the target AP set based on the measurement result of each candidate AP in the candidate AP set.

[0315] In some embodiments, the downlink measurement channel includes one of the following:

[0316] the first channel;

[0317] Channel State Information Reference Signal CSI-RS.

[0318] In the embodiment of the present application, if a candidate AP is an AP set or each AP in the AP set sends a first channel, the downlink measurement channel includes the first channel.

[0319] It can be understood that the first channel is for the AP set, and the CSI-RS is for the AP.

[0320] In some embodiments, the uplink measurement channel includes one of the following:

[0321] A third channel, wherein the third channel is used for the terminal device to establish an association relationship with the target AP set;

[0322] Sounding Reference Signal SRS.

[0323] In the embodiment of the present application, if a candidate AP is an AP set or the third channel is sent to each AP in the AP set, the uplink measurement channel includes the third channel.

[0324] It can be understood that the third channel is for the AP set, and SRS is for the AP.

[0325] In an embodiment of the present application, the terminal device manages the AP set by measuring the first channel and / or CSI-RS, or measuring the third channel and / or SRS by the candidate AP in the candidate AP set, thereby continuously updating the AP set associated with the terminal, ensuring that the terminal device is always served by one or more APs with better channel conditions, and ensuring the service quality of the communication system.

[0326] The following further describes the wireless communication method provided in the embodiments of the present application.

[0327] The wireless communication method provided in the embodiments of the present application includes but is not limited to the following embodiments 1 and 2.

[0328] Example 1: Establishing a terminal-associated AP set

[0329] Before establishing an RRC connection, the terminal can establish an association with an AP set consisting of one or more APs in the network through a random access process. The specific process is as follows:

[0330] 1) The terminal measures the first channel periodically transmitted by the AP set to determine the target AP set.

[0331] The first channel transmitted by the AP set should at least carry the functions of downlink time synchronization, frequency synchronization, and AP signal strength measurement. Therefore, the first channel must at least contain a synchronization signal to accomplish these functions. The synchronization signal can be transmitted using a pseudo-random sequence, such as an m-sequence or Gold sequence with good autocorrelation and cross-correlation characteristics. Based on this, when detecting the synchronization signal, the terminal can perform correlation detection on the sequences that may be used by the synchronization signal. Once the synchronization signal is detected, downlink time and frequency synchronization of the target AP set can be completed.

[0332] Optionally, synchronization signals of different AP sets use different sequences, so that the terminal can distinguish different AP sets in the network according to the synchronization signals.

[0333] In one example, as shown in Figure 11, AP Set 1 and AP Set 2 are connected to the CPU. Synchronization Signal 1 of AP Set 1 and Synchronization Signal 2 of AP Set 2 use Sequence 1 and Sequence 2, respectively. When detecting synchronization signals, a terminal device uses the pseudo-random sequences corresponding to Sequence 1 and Sequence 2 for correlation detection, thereby distinguishing the synchronization signals of AP Set 1 from those of AP Set 2. Because the terminal device is close to AP Set 1, the received power of Synchronization Signal 1 is higher, so the terminal device selects AP Set 1 as the target AP Set for downlink time and frequency synchronization.

[0334] In some embodiments, the first channel indicates first channel information, and the first channel information includes at least one of the following:

[0335] The location of the time domain resources corresponding to the first channel, such as the radio frame index, time slot index, and symbol index corresponding to the first channel transmission, so that the terminal completes the radio frame timing, time slot timing, and symbol timing after receiving the first channel;

[0336] The position of the frequency domain resources corresponding to the first channel, for example, the RB index and subcarrier index corresponding to the first channel transmission in the initial downlink BWP, so that the terminal determines the frequency domain position relationship between the first channel and the initial downlink BWP after receiving the first channel;

[0337] The wireless channel after the first channel transmits the corresponding time domain resource position, frequency domain resource position, time domain resource size, and frequency domain resource size.

[0338] 2) The terminal device sends a third channel to the target AP set, requesting to establish an association relationship with the target AP set.

[0339] The third channel sent by the terminal device should at least carry the functions of uplink time synchronization and requesting to establish an association relationship with the target AP set. Therefore, the third channel can be sent using a pseudo-random sequence (second pseudo-random sequence), such as a ZC sequence with low peak-to-average bit characteristics. After the AP set sends the first channel, the third channel is detected at a third time domain position and a third frequency domain position, for example, correlation detection is performed on the sequence that may be used for the third channel. When the existence of the third channel is detected, the uplink time synchronization of the terminal sending the third channel can be completed. Subsequently, the terminal establishes an association relationship with the target AP set through a random access process.

[0340] The third time domain position can be determined by the first time domain offset, which is the number of time domain units that the third channel is offset from the first channel, such as the number of offset time slots and symbols. For example, the third time domain position is the time domain position corresponding to 1 time slot and 2 symbols after the first channel, such as the third channel transmitted in time slot #1 in Figure 12. The third time domain position can also be a specified time domain unit index, such as a specified time slot and symbol index. For example, the third time domain position is the time domain position corresponding to symbol #8 of time slot #2, such as the third channel transmitted in time slot #2 in Figure 12. The number of offset time domain units and / or the specified time domain unit index included in the first time domain offset can be a default value provided by the protocol, or can be provided through the first channel.

[0341] The third frequency domain position may be based on the first frequency domain offset, which is the number of frequency domain units that the third channel is offset from the first channel, such as the number of offset RBs and subcarriers. For example, the frequency domain position corresponding to the first channel offset by 1 RB and 2 subcarriers is as shown in FIG12 . The first frequency domain position may also be the frequency domain unit index specified in the initial uplink BWP, such as the specified RB and subcarrier index, for example, the frequency domain position corresponding to subcarrier #8 of RB#2 is as shown in FIG12 . The number of offset RBs and subcarriers, and / or the specified RB and subcarrier index indicated by the first frequency domain offset may be a default value provided by the protocol, or may be provided through the first channel.

[0342] In some embodiments, the size of the time domain resources and the size of the frequency domain resources occupied by the third channel transmission are provided via the first channel. For example, if the number of symbols and RBs occupied by the third channel transmission is not fixed, the specific number of symbols and RBs occupied by the third channel transmission can be indicated via the first channel to ensure that the terminal device and the target AP set have the same understanding of the time and frequency domain resources occupied by the third channel transmission.

[0343] 3) The target AP set sends the fourth channel to the terminal, providing the configuration information required for the random access process, namely the first random access resource configuration information

[0344] In response to the third channel transmission, the terminal device receives a fourth channel, such as a PDSCH, sent by the target AP set at a fourth time domain position and a fourth frequency domain position, where the fourth channel carries second information, and the second information includes at least one of the following:

[0345] Frequency domain position and bandwidth information of the initial downlink BWP, where the initial downlink BWP is the frequency range in which the downlink channel is transmitted during the random access process;

[0346] Frequency domain position and bandwidth information of the initial uplink BWP, where the initial uplink BWP is the frequency range in which the uplink channel is transmitted during the random access process;

[0347] Time domain position information corresponding to the fourth channel, for example, a radio frame index, a time slot index, and a symbol index corresponding to the fourth channel transmission, so that the terminal device completes radio frame timing, time slot timing, and symbol timing after receiving the fourth channel;

[0348] The RAR message of the terminal, for example, the RAR message for the terminal sending the third channel.

[0349] In some embodiments, the RAR message includes a timing advance (TA) for the terminal, namely, a second TA, uplink grant scheduling information, and a temporary identifier used in a random access procedure.

[0350] After receiving the fourth channel sent by the target AP set, the terminal device can obtain the configuration information required for the random access process, thereby completing the random access process with the target AP set and establishing an association relationship with the target AP set, as shown in Figure 13, including:

[0351] S1301. The AP aggregate sends a first channel for downlink time-frequency synchronization and signal strength measurement.

[0352] S1302. The terminal device sends a third channel for uplink time synchronization and requests to establish an association relationship with the target AP set.

[0353] S1303: The AP group sends a fourth channel to provide configuration information required for the random access process.

[0354] The configuration information required for the random access process is the first random access process configuration information. The random access process is completed through the first random access process configuration information, thereby establishing an association relationship between the AP set and the terminal device.

[0355] In order to determine the fourth time domain position and the fourth frequency domain position, the terminal device needs to listen to the fifth channel, such as PDCCH, at the fifth time domain position and the fifth frequency domain position before receiving the fourth channel. The fifth channel is used to schedule the fourth channel, so the fifth channel carries at least one of the following information: the fourth time domain position, the fourth frequency domain position, the size of the time domain resources occupied by the fourth channel transmission, and the size of the frequency domain resources occupied by the fourth channel transmission.

[0356] Based on this, the fourth time domain position can be determined based on the fifth time domain offset, which can be the number of time domain units that the fourth channel is offset from the fifth channel, such as the number of offset time slots and symbols; the fourth time domain position can also be a specified time domain unit index, such as a specified time slot and symbol index. Similarly, the fourth frequency domain position can be determined based on the fifth frequency domain offset, which can be the number of frequency domain units that the fourth channel is offset from the fifth channel, such as the number of offset RBs and subcarriers; the fourth frequency domain position can also be a frequency domain unit index specified in the initial downlink BWP, such as a specified RB and subcarrier index.

[0357] In order to determine the fifth time domain position and the fifth frequency domain position, the terminal receives the sixth channel, such as PBCH, at the sixth time domain position and the sixth frequency domain position after sending the third channel and before monitoring the fifth channel. The sixth channel is used to determine the time-frequency domain resources and position information of the fifth channel. Therefore, the sixth channel carries at least one of the following information: the fifth time domain position, the fifth frequency domain position, the size of the time domain resources occupied by the fifth channel transmission, the size of the frequency domain resources occupied by the fifth channel transmission, and the position of the time domain resources corresponding to the sixth channel. It should be noted that if the sixth channel carries the position information of its corresponding time domain resources, such as the wireless frame index, time slot index and symbol index corresponding to the sixth channel transmission, the terminal device can complete the wireless frame timing, time slot timing and symbol timing after receiving the sixth channel.

[0358] Based on this, the fifth time domain position can be determined based on the seventh time domain offset, which can be the number of time domain units that the fifth channel is offset from the sixth channel, such as the number of offset time slots and symbols; the fifth time domain position can also be a specified time domain unit index, such as a specified time slot and symbol index. Similarly, the fifth frequency domain position can be determined based on the seventh frequency domain offset, which is the number of frequency domain units that the fifth channel is offset from the sixth channel, such as the number of offset RBs and subcarriers; the fifth frequency domain position can also be a frequency domain unit index specified in the initial downlink BWP, such as a specified RB and subcarrier index.

[0359] Similarly, the sixth time domain position can be determined based on the eighth time domain offset or the ninth time domain offset, the eighth time domain offset or the ninth time domain offset is the number of time domain units of the sixth channel offset relative to the first channel or the third channel, such as the number of offset time slots and symbols; the sixth time domain position can also be a specified time domain unit index, such as a specified time slot and symbol index. Similarly, the sixth frequency domain position can be determined based on the eighth frequency domain offset or the ninth frequency domain offset, the eighth frequency domain offset or the ninth frequency domain offset is the number of frequency domain units of the sixth channel offset relative to the first channel or the third channel, such as the number of offset RBs and subcarriers; the sixth frequency domain position can also be a frequency domain unit index specified in the initial downlink BWP, such as a specified RB and subcarrier index. The sixth time domain position, the sixth frequency domain position, and the size of the time domain resources and the size of the frequency domain resources corresponding to the sixth channel transmission are provided through the first signal channel, as shown in Figure 14.

[0360] In addition, the transmission delay of the NTN system is usually several milliseconds to several hundred milliseconds. In order to compensate for the impact of the transmission delay on the timing relationship, the terminal needs to adjust the TA before sending the uplink channel. In addition, the acquisition of the TA, i.e., the first TA, in the NTN system needs to be based on at least one of the following information: satellite ephemeris information and public TA information.

[0361] The information required for obtaining the TA in the NTN system can be provided through the first channel, so that the terminal can obtain the TA after receiving the first channel, and send the third channel to the target AP set after adjusting the TA to complete the subsequent random access process.

[0362] The information required for obtaining the TA in the NTN system can also be provided via the fourth channel. In some embodiments, before sending the third channel, the terminal first receives the fourth channel at the second time domain position. If the terminal receives the fourth channel sent by the AP set and obtains the TA information provided by the fourth channel, the terminal can then send the third channel to the target AP set after adjusting the TA, completing the subsequent random access process. In other embodiments, the terminal does not adjust the TA when sending the third channel to the target AP set. In this case, the AP set is required to detect the third channel at the first time domain position after considering the impact of transmission delay and provide TA information in the fourth channel. The terminal can then adjust the TA for uplink transmissions after the fourth channel to complete the subsequent random access process.

[0363] Example 2: Update the AP set associated with the terminal device, i.e., the target AP set

[0364] After a terminal device establishes an association with an AP set consisting of one or more APs through a random access process, considering the mobility of the AP and the terminal device, it is necessary to manage the AP set associated with the terminal device, for example, continuously updating the AP set associated with the terminal to ensure that the terminal device is always served by one or more APs with better channel conditions.

[0365] The management of the AP set can be carried out through the measurement of the first channel and / or CSI-RS, and the RSRP and / or SINR measurement results can be used as metrics. For example, the CPU uses the M APs in the network as the candidate service AP set of the terminal, and allocates independent first channel resources and / or CSI-RS resources to the APs in the set for association. The terminal reports third information to the network based on the measurement results of the first channel and / or CSI-RS, and the third information includes K≥1 first channel resource indication information and / or CSI-RS resource indication information, and corresponding RSRP and / or SINR measurement results.

[0366] At this time, the CPU determines the AP set associated with the terminal based on the third information reported by the terminal and the association relationship between the AP and the first channel resources and / or CSI-RS resources. As shown in Figure 15, M APs constitute the terminal candidate service AP set, i.e., the candidate AP set, and K APs constitute the terminal associated AP set, i.e., the target AP set. The M APs in the candidate AP set include the K APs in the target AP set.

[0367] AP sets can also be managed through third channel and / or SRS measurements, using RSRP and / or SINR measurement results as metrics. For example, the CPU considers M APs in the network as candidate serving AP sets for a terminal, receives the third channel and / or SRS sent by the terminal, and determines the AP set associated with the terminal based on the RSRP and / or SINR measurement results of the M APs.

[0368] It should be noted that the transmission delays between different APs and terminals in the NTN system vary significantly. Therefore, the terminal needs to consider the transmission delays of different APs when performing first channel and / or CSI-RS measurements. In one possible implementation, the AP indicates to the terminal the association between the first channel resources and / or CSI-RS resources and ephemeris information. When measuring the first channel and / or CSI-RS, the terminal first calculates the transmission delay based on the ephemeris information associated with the first channel resources and / or CSI-RS resources, and then performs the first channel and / or CSI-RS measurements at the time domain location after accounting for the influence of the propagation delay.

[0369] For example, AP#1 and AP#2 in the candidate serving AP set are associated with CSI-RS resource #1 and CSI-RS resource #2, respectively, and the terminal is notified of the ephemeris information of AP#1 and AP#2. When performing CSI-RS measurement, the terminal first calculates the transmission delays T1 and T2 based on the ephemeris information of AP#1 and AP#2, respectively. Then, when measuring CSI-RS#2, it delays the measurement of CSI-RS#1 by an additional time duration of T2-T1.

[0370] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0371] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in 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 the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0372] FIG16 is a schematic diagram of the structure of a wireless communication terminal device provided in an embodiment of the present application, as shown in FIG16 , including:

[0373] The first communication 1601 is configured to receive at least one first channel sent by a first access device set, wherein the first access device set includes at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

[0374] In some embodiments, the first receiving power is used to determine whether the first access device set is the target access device set, and the first receiving power is determined based on the receiving power of the first channel sent by the first access device set received by the terminal device.

[0375] In some embodiments, the first channel carries a downlink synchronization signal, and the downlink synchronization signal is used for downlink synchronization between the terminal device and the set of access devices that send the first channel.

[0376] In some embodiments, downlink synchronization signals in the first channel sent by different access device sets are sent using different first pseudo-random sequences.

[0377] In some embodiments, the first channel carries at least one of the following:

[0378] first indication information, where the first indication information indicates a location of a first resource, where the first resource is a resource occupied by transmission of the first channel, and the location of the first resource is used for time domain positioning and / or frequency domain positioning;

[0379] second indication information, where the second indication information indicates a second resource, where the second resource is a resource occupied by transmission of a second channel, and the second channel is a wireless channel subsequent to the first channel;

[0380] First information, the first information is used by the terminal device to determine a first timing advance TA.

[0381] In some embodiments, the first communication unit 1601 is further configured to send a third channel to the first access device set if it is determined that the first access device set is the target access device set, and the third channel is used to establish an association relationship between the terminal device and the first access device set.

[0382] In some embodiments, the third channel carries an uplink synchronization signal, and the uplink synchronization signal is used for uplink synchronization between the terminal device and the target access device set.

[0383] In some embodiments, the third resource occupied by the third channel transmission is determined based on at least one of the following:

[0384] a first resource and a first offset, wherein the first resource is a resource occupied by transmission of the first channel, and the first offset is an offset of the third resource relative to the first resource in the time domain and / or frequency domain;

[0385] The third indication information is used to indicate the position and / or size of the third resource in the frequency domain and / or time domain.

[0386] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0387] the first offset;

[0388] The third indication information.

[0389] In some embodiments, the first communication unit 1601 is also configured to receive a fourth channel sent by the first access device set, and the fourth channel is used to carry first random access configuration information corresponding to the first access device set, and the first random access configuration information is used for the random access process of the terminal device accessing the first access device set.

[0390] In some embodiments, the first random access configuration information includes at least one of the following:

[0391] A first frequency range, where the first frequency range is a frequency range in which downlink channel transmission occurs during a random access process;

[0392] The second frequency range is a frequency range in which uplink channel transmission occurs during a random access process.

[0393] In some embodiments, the fourth channel is further used to carry at least one of the following:

[0394] Fourth indication information, where the fourth indication information is used to indicate a time domain position of a fourth resource, where the fourth resource is a resource occupied by transmission of the fourth channel, and the time domain position of the fourth resource is used for time domain positioning;

[0395] First information, where the first information is used by the terminal device to determine a first TA;

[0396] Random access response RAR message.

[0397] In some embodiments, the first TA is used to adjust a sending time of a first uplink transmission, where the first uplink transmission is an uplink transmission after receiving the first information.

[0398] In some embodiments, the reception of the fourth channel precedes the sending of the third channel, the third channel is a channel sent by the terminal device to the first access device set when the first access device set is determined to be the target access device set, and the third channel is used for the terminal device to establish an association relationship with the target access device set; or,

[0399] The transmission of the third channel precedes the reception of the fourth channel.

[0400] In some embodiments, the fourth resource occupied by the transmission of the fourth channel is determined based on at least one of the following:

[0401] a first resource and a second offset, wherein the first resource is a resource occupied by transmission of the first channel, and the second offset is an offset of the fourth resource relative to the first resource in the time domain and / or frequency domain;

[0402] a third resource and a third offset, wherein the third resource is a resource occupied by transmission of a third channel before the fourth channel, and the third offset is an offset of the fourth resource relative to the third resource in the time domain and / or frequency domain;

[0403] fifth indication information, where the fifth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0404] A fifth channel is used to schedule the fourth channel.

[0405] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0406] the second offset;

[0407] the third offset;

[0408] The fifth indication information.

[0409] In some embodiments, the fifth channel includes at least one of the following:

[0410] Sixth indication information, where the sixth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0411] A fourth offset, where the fourth offset is an offset of the fourth resource relative to the fifth resource occupied by the transmission of the fifth channel in the time domain and / or frequency domain.

[0412] In some embodiments, the fifth resource occupied by the transmission of the fifth channel is determined based on at least one of the following:

[0413] The first resource and a fifth offset, where the fifth offset is an offset of the fifth resource relative to the first resource in the time domain and / or frequency domain;

[0414] The third resource and a sixth offset, wherein the sixth offset is an offset of the fifth resource relative to the third resource in the time domain and / or frequency domain;

[0415] Seventh indication information, where the seventh indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0416] A sixth channel is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain.

[0417] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0418] the fifth offset;

[0419] the sixth offset;

[0420] The seventh indication information.

[0421] In some embodiments, the sixth channel includes at least one of the following:

[0422] Eighth indication information, where the eighth indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0423] a seventh offset, where the seventh offset is an offset of the fifth resource relative to the sixth resource occupied by transmission of the sixth channel in the time domain and / or frequency domain;

[0424] Ninth indication information, the ninth indication information is used to indicate the position of the sixth resource, and the position of the sixth resource is used for time domain positioning and / or frequency domain positioning.

[0425] In some embodiments, the sixth resource occupied by the transmission of the sixth channel is determined based on at least one of the following:

[0426] The first resource and an eighth offset, where the eighth offset is an offset of the sixth resource relative to the first resource in the time domain and / or frequency domain;

[0427] The third resource and a ninth offset, wherein the ninth offset is an offset of the sixth resource relative to the third resource in the time domain and / or frequency domain;

[0428] Tenth indication information, where the tenth indication information is used to indicate the position and / or size of the sixth resource in the time domain and / or frequency domain.

[0429] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0430] the eighth offset;

[0431] the ninth offset;

[0432] The tenth indication information.

[0433] In some embodiments, the first communication unit 1601 is further configured to send or receive a seventh channel if it is determined that the first access device set is the target access device set, and the seventh channel is used to update the access devices included in the target access device set.

[0434] In some embodiments, measurement results corresponding to access devices in a candidate access device set are used to update the target access device set, and the candidate access device set includes access devices in the first access device set.

[0435] In some embodiments, the measurement result includes at least one of the following:

[0436] Reference signal received power RSRP;

[0437] Signal to Interference and Noise Ratio SINR.

[0438] In some embodiments, for a candidate access device in the set of candidate access devices, the seventh channel includes at least one of the following:

[0439] Uplink measurement channel;

[0440] Downlink measurement channel.

[0441] In some embodiments, the downlink measurement channel includes one of the following:

[0442] the first channel;

[0443] Channel State Information Reference Signal.

[0444] In some embodiments, the uplink measurement channel includes one of the following:

[0445] a third channel, wherein the third channel is used for establishing an association relationship between the terminal device and the target access device set;

[0446] Probing reference signal.

[0447] FIG17 is a schematic diagram of the structure of a first access device provided in an embodiment of the present application, as shown in FIG17 , including:

[0448] The second communication unit 1701 is configured to send a first channel to the terminal device, to which the first access device belongs, the first access device set including at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

[0449] In some embodiments, the first receiving power is used to determine whether the first access device set is the target access device set, and the first receiving power is determined based on the receiving power of the first channel sent by the first access device set received by the terminal device.

[0450] In some embodiments, the first channel carries a downlink synchronization signal, and the downlink synchronization signal is used for downlink synchronization between the terminal device and the set of access devices that send the first channel.

[0451] In some embodiments, downlink synchronization signals in the first channel sent by different access device sets are sent using different first pseudo-random sequences.

[0452] In some embodiments, the first channel carries at least one of the following:

[0453] first indication information, where the first indication information indicates a location of a first resource, where the first resource is a resource occupied by transmission of the first channel, and the location of the first resource is used for time domain positioning and / or frequency domain positioning;

[0454] second indication information, where the second indication information indicates a second resource, where the second resource is a resource occupied by transmission of a second channel, and the second channel is a wireless channel subsequent to the first channel;

[0455] First information, the first information is used by the terminal device to determine a first timing advance TA.

[0456] In some embodiments, the second communication unit 1701 is further configured to receive a third channel sent by the terminal device if it is determined that the first access device set is the target access device set, and the third channel is used to establish an association relationship between the terminal device and the first access device set.

[0457] In some embodiments, the third channel carries an uplink synchronization signal, and the uplink synchronization signal is used for uplink synchronization between the terminal device and the target access device set.

[0458] In some embodiments, the third resource occupied by the third channel transmission is determined based on at least one of the following:

[0459] a first resource and a first offset, wherein the first resource is a resource occupied by transmission of the first channel, and the first offset is an offset of the third resource relative to the first resource in the time domain and / or frequency domain;

[0460] The third indication information is used to indicate the position and / or size of the third resource in the frequency domain and / or time domain.

[0461] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0462] the first offset;

[0463] The third indication information.

[0464] In some embodiments, the second communication unit 1701 is further configured to send a fourth channel to the terminal device, wherein the fourth channel is used to carry first random access configuration information corresponding to the first access device set, and the first random access configuration information is used for the random access process of the terminal device accessing the first access device set.

[0465] In some embodiments, the first random access configuration information includes at least one of the following:

[0466] A first frequency range, where the first frequency range is a frequency range in which downlink channel transmission occurs during a random access process;

[0467] The second frequency range is a frequency range in which uplink channel transmission occurs during a random access process.

[0468] In some embodiments, the fourth channel is further used to carry at least one of the following:

[0469] Fourth indication information, where the fourth indication information is used to indicate a time domain position of a fourth resource, where the fourth resource is a resource occupied by transmission of the fourth channel, and the time domain position of the fourth resource is used for time domain positioning;

[0470] First information, where the first information is used by the terminal device to determine a first TA;

[0471] Random access response RAR message.

[0472] In some embodiments, the first TA is used to adjust a sending time of a first uplink transmission, where the first uplink transmission is an uplink transmission after receiving the first information.

[0473] In some embodiments, the reception of the fourth channel precedes the sending of the third channel, the third channel is a channel sent by the terminal device to the first access device set when the first access device set is determined to be the target access device set, and the third channel is used for the terminal device to establish an association relationship with the target access device set; or,

[0474] The transmission of the third channel precedes the reception of the fourth channel.

[0475] In some embodiments, the fourth resource occupied by the transmission of the fourth channel is determined based on at least one of the following:

[0476] a first resource and a second offset, wherein the first resource is a resource occupied by transmission of the first channel, and the second offset is an offset of the fourth resource relative to the first resource in the time domain and / or frequency domain;

[0477] a third resource and a third offset, wherein the third resource is a resource occupied by transmission of a third channel before the fourth channel, and the third offset is an offset of the fourth resource relative to the third resource in the time domain and / or frequency domain;

[0478] fifth indication information, where the fifth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0479] A fifth channel is used to schedule the fourth channel.

[0480] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0481] the second offset;

[0482] the third offset;

[0483] The fifth indication information.

[0484] In some embodiments, the fifth channel includes at least one of the following:

[0485] Sixth indication information, where the sixth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain;

[0486] A fourth offset, where the fourth offset is an offset of the fourth resource relative to the fifth resource occupied by the transmission of the fifth channel in the time domain and / or frequency domain.

[0487] In some embodiments, the fifth resource occupied by the transmission of the fifth channel is determined based on at least one of the following:

[0488] The first resource and a fifth offset, where the fifth offset is an offset of the fifth resource relative to the first resource in the time domain and / or frequency domain;

[0489] The third resource and a sixth offset, wherein the sixth offset is an offset of the fifth resource relative to the third resource in the time domain and / or frequency domain;

[0490] Seventh indication information, where the seventh indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0491] A sixth channel is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain.

[0492] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0493] the fifth offset;

[0494] the sixth offset;

[0495] The seventh indication information.

[0496] In some embodiments, the sixth channel includes at least one of the following:

[0497] Eighth indication information, where the eighth indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain;

[0498] a seventh offset, where the seventh offset is an offset of the fifth resource relative to the sixth resource occupied by transmission of the sixth channel in the time domain and / or frequency domain;

[0499] Ninth indication information, the ninth indication information is used to indicate the position of the sixth resource, and the position of the sixth resource is used for time domain positioning and / or frequency domain positioning.

[0500] In some embodiments, the sixth resource occupied by the transmission of the sixth channel is determined based on at least one of the following:

[0501] The first resource and an eighth offset, where the eighth offset is an offset of the sixth resource relative to the first resource in the time domain and / or frequency domain;

[0502] The third resource and a ninth offset, wherein the ninth offset is an offset of the sixth resource relative to the third resource in the time domain and / or frequency domain;

[0503] Tenth indication information, where the tenth indication information is used to indicate the position and / or size of the sixth resource in the time domain and / or frequency domain.

[0504] In some embodiments, at least one of the following is agreed upon by the protocol or indicated by the first channel:

[0505] the eighth offset;

[0506] the ninth offset;

[0507] The tenth indication information.

[0508] In some embodiments, the second communication unit 1701 is further configured to receive or send a seventh channel if it is determined that the first access device set is the target access device set, and the seventh channel is used to update the access devices included in the target access device set.

[0509] In some embodiments, measurement results corresponding to access devices in a candidate access device set are used to update the target access device set, and the candidate access device set includes access devices in the first access device set.

[0510] In some embodiments, the measurement result includes at least one of the following:

[0511] Reference signal received power RSRP;

[0512] Signal to Interference and Noise Ratio SINR.

[0513] In some embodiments, for a candidate access device in the set of candidate access devices, the seventh channel includes at least one of the following:

[0514] Uplink measurement channel;

[0515] Downlink measurement channel.

[0516] In some embodiments, the downlink measurement channel includes one of the following:

[0517] the first channel;

[0518] Channel State Information Reference Signal.

[0519] In some embodiments, the uplink measurement channel includes one of the following:

[0520] a third channel, wherein the third channel is used for establishing an association relationship between the terminal device and the target access device set;

[0521] Probing reference signal.

[0522] Those skilled in the art should understand that the relevant description of the above-mentioned terminal device or first access device in the embodiment of the present application can be understood by referring to the relevant description of the wireless communication method in the embodiment of the present application.

[0523] Figure 18 is a schematic structural diagram of a communication device 1800 provided in an embodiment of the present application. The communication device can be a terminal device or a first access device. The communication device 1800 shown in Figure 18 includes a processor 1810, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0524] Optionally, as shown in FIG18 , the communication device 1800 may further include a memory 1820. The processor 1810 may call and execute a computer program from the memory 1820 to implement the method in the embodiment of the present application.

[0525] The memory 1820 may be a separate device independent of the processor 1810 , or may be integrated into the processor 1810 .

[0526] Optionally, as shown in FIG18 , the communication device 1800 may further include a transceiver 1830 , and the processor 1810 may control the transceiver 1830 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0527] The transceiver 1830 may include a transmitter and a receiver. The transceiver 1830 may further include an antenna, and the number of antennas may be one or more.

[0528] Optionally, the communication device 1800 may specifically be the first access device of the embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the first access device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0529] Optionally, the communication device 1800 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0530] Figure 19 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1900 shown in Figure 19 includes a processor 1910, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0531] Optionally, as shown in FIG19 , the chip 1900 may further include a memory 1920. The processor 1910 may call and execute a computer program from the memory 1920 to implement the method in the embodiment of the present application.

[0532] The memory 1920 may be a separate device independent of the processor 1910 , or may be integrated into the processor 1910 .

[0533] Optionally, the chip 1900 may further include an input interface 1930. The processor 1910 may control the input interface 1930 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0534] Optionally, the chip 1900 may further include an output interface 1940. The processor 1910 may control the output interface 1940 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0535] Optionally, the chip can be applied to the first access device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first access device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0536] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0537] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0538] FIG20 is a schematic block diagram of a communication system 2000 provided in an embodiment of the present application. As shown in FIG20 , the communication system 2000 includes a terminal device 2010 and a first access device 2020 .

[0539] Among them, the terminal device 2010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the first access device 2020 can be used to implement the corresponding functions implemented by the first access device in the above method. For the sake of brevity, they are not repeated here.

[0540] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0541] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0542] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0543] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0544] Optionally, the computer-readable storage medium can be applied to the first access device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first access device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0545] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0546] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0547] Optionally, the computer program product can be applied to the first access device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the first access device in the various methods of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0548] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0549] The embodiment of the present application also provides a computer program.

[0550] Optionally, the computer program can be applied to the first access device in the embodiment of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the first access device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0551] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0552] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0553] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0554] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0555] The units described as separate components may or may not be physically separate, and 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 these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0556] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0557] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0558] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, the method comprising: A terminal device receives at least one first channel sent by a first access device set, wherein the first access device set includes at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

2. The method according to claim 1, wherein: The first receiving power is used to determine whether the first access device set is the target access device set, and the first receiving power is determined based on the receiving power of the first channel sent by the first access device set and received by the terminal device.

3. The method according to claim 1 or 2, wherein: The first channel carries a downlink synchronization signal, and the downlink synchronization signal is used for downlink synchronization between the terminal device and a set of access devices that send the first channel.

4. The method according to claim 3, wherein: The downlink synchronization signals in the first channel sent by different access device sets are sent using different first pseudo-random sequences.

5. The method according to any one of claims 1 to 4, wherein: The first channel carries at least one of the following: first indication information, where the first indication information indicates a position of a first resource, where the first resource is a resource occupied by transmission of the first channel, and the position of the first resource is used for time domain positioning and / or frequency domain positioning; second indication information, where the second indication information indicates a second resource, where the second resource is a resource occupied by transmission of a second channel, and the second channel is a wireless channel subsequent to the first channel; The first information is used by the terminal device to determine a first timing advance TA.

6. The method according to any one of claims 1 to 5, wherein: If it is determined that the first access device set is the target access device set, the method further includes: The terminal device sends a third channel to the first access device set, and the third channel is used for the terminal device to establish an association relationship with the first access device set.

7. The method according to claim 6, wherein: The third channel carries an uplink synchronization signal, and the uplink synchronization signal is used for uplink synchronization between the terminal device and the target access device set.

8. The method according to any one of claims 6 to 7, wherein: The third resource occupied by the third channel transmission is determined based on at least one of the following: a first resource and a first offset, wherein the first resource is a resource occupied by transmission of the first channel, and the first offset is an offset of the third resource relative to the first resource in the time domain and / or frequency domain; The third indication information is used to indicate the position and / or size of the third resource in the frequency domain and / or time domain.

9. The method according to claim 8, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the first offset; The third indication information.

10. The method according to any one of claims 1 to 9, wherein: The method further comprises: The terminal device receives a fourth channel sent by the first access device set, where the fourth channel is used to carry first random access configuration information corresponding to the first access device set, and the first random access configuration information is used for the random access process of the terminal device accessing the first access device set.

11. The method according to claim 10, wherein: The first random access configuration information includes at least one of the following: A first frequency range, where the first frequency range is a frequency range in which downlink channel transmission occurs during a random access process; The second frequency range is a frequency range in which uplink channel transmission in a random access process occurs.

12. The method according to claim 10 or 11, wherein: The fourth channel is also used to carry at least one of the following: Fourth indication information, where the fourth indication information is used to indicate a time domain position of a fourth resource, where the fourth resource is a resource occupied by transmission of the fourth channel, and the time domain position of the fourth resource is used for time domain positioning; First information, where the first information is used by the terminal device to determine a first TA; Random access response RAR message.

13. The method according to claim 5 or 12, wherein: The first TA is used to adjust the sending time of a first uplink transmission, where the first uplink transmission is the uplink transmission after the first information is received.

14. The method according to any one of claims 10 to 13, wherein: The reception of the fourth channel precedes the sending of the third channel, the third channel is a channel sent by the terminal device to the first access device set when the first access device set is determined to be the target access device set, and the third channel is used for the terminal device to establish an association relationship with the target access device set; or, The transmission of the third channel precedes the reception of the fourth channel.

15. The method according to any one of claims 10 to 12 and 14, wherein: The fourth resource occupied by the transmission of the fourth channel is determined based on at least one of the following: a first resource and a second offset, wherein the first resource is a resource occupied by transmission of the first channel, and the second offset is an offset of the fourth resource relative to the first resource in the time domain and / or frequency domain; a third resource and a third offset, wherein the third resource is a resource occupied by transmission of a third channel before the fourth channel, and the third offset is an offset of the fourth resource relative to the third resource in the time domain and / or frequency domain; fifth indication information, where the fifth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain; A fifth channel is used to schedule the fourth channel.

16. The method according to claim 15, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the second offset; the third offset; The fifth indication information.

17. The method according to claim 15, wherein: The fifth channel includes at least one of the following: Sixth indication information, where the sixth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain; A fourth offset, where the fourth offset is an offset of the fourth resource relative to the fifth resource occupied by the transmission of the fifth channel in the time domain and / or frequency domain.

18. The method according to claim 15, wherein: The fifth resource occupied by the transmission of the fifth channel is determined based on at least one of the following: The first resource and a fifth offset, wherein the fifth offset is an offset of the fifth resource relative to the first resource in the time domain and / or frequency domain; The third resource and a sixth offset, wherein the sixth offset is an offset of the fifth resource relative to the third resource in the time domain and / or frequency domain; seventh indication information, where the seventh indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain; A sixth channel, wherein the sixth channel is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain.

19. The method according to claim 18, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the fifth offset; the sixth offset; The seventh indication information.

20. The method according to claim 18, wherein: The sixth channel includes at least one of the following: Eighth indication information, where the eighth indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain; a seventh offset, where the seventh offset is an offset of the fifth resource relative to a sixth resource occupied by transmission of the sixth channel in the time domain and / or frequency domain; Ninth indication information, the ninth indication information is used to indicate the position of the sixth resource, and the position of the sixth resource is used for time domain positioning and / or frequency domain positioning.

21. The method according to claim 18 or 20, wherein: The sixth resource occupied by the transmission of the sixth channel is determined based on at least one of the following: The first resource and an eighth offset, the eighth offset being an offset of the sixth resource relative to the first resource in the time domain and / or frequency domain; The third resource and a ninth offset, wherein the ninth offset is an offset of the sixth resource relative to the third resource in the time domain and / or frequency domain; The tenth indication information is used to indicate the position and / or size of the sixth resource in the time domain and / or frequency domain.

22. The method according to claim 21, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the eighth offset; the ninth offset; The tenth indication information.

23. The method according to any one of claims 1 to 22, wherein: If it is determined that the first access device set is the target access device set, the method further includes: The terminal device sends or receives a seventh channel, and the seventh channel is used to update the access devices included in the target access device set.

24. The method according to claim 23, wherein: The measurement results corresponding to the candidate access devices in the candidate access device set are used to update the target access device set, and the candidate access device set includes the access devices in the first access device set.

25. The method according to claim 24, wherein: The measurement result includes at least one of the following: Reference signal received power RSRP; Signal to Interference plus Noise Ratio SINR.

26. The method according to claim 24 or 25, wherein: For a candidate access device in the candidate access device set, the seventh channel includes at least one of the following: Uplink measurement channel; Downlink measurement channel.

27. The method according to claim 26, wherein: The downlink measurement channel includes one of the following: the first channel; Channel State Information Reference Signal.

28. The method according to claim 26, wherein: The uplink measurement channel includes one of the following: A third channel, wherein the third channel is used for the terminal device to establish an association relationship with the target access device set; Probe reference signal.

29. A wireless communication method, comprising: A first access device sends a first channel to a terminal device, the first access device belongs to a first access device set, the first access device set includes at least one access device, and at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

30. The method of claim 29, wherein: The first receiving power is used to determine whether the first access device set is the target access device set, and the first receiving power is determined based on the receiving power of the first channel sent by the first access device set and received by the terminal device.

31. The method according to claim 29 or 30, wherein: The first channel carries a downlink synchronization signal, and the downlink synchronization signal is used for downlink synchronization between the terminal device and a set of access devices that send the first channel.

32. The method according to claim 31, wherein: The downlink synchronization signals in the first channel sent by access devices in different access device sets are sent using different first pseudo-random sequences.

33. The method according to any one of claims 29 to 32, wherein: The first channel carries at least one of the following: first indication information, where the first indication information indicates a position of a first resource, where the first resource is a resource occupied by transmission of the first channel, and the position of the first resource is used for time domain positioning and / or frequency domain positioning; second indication information, where the second indication information indicates a second resource, where the second resource is a resource occupied by transmission of a second channel, and the second channel is a wireless channel subsequent to the first channel; The first information is used by the terminal device to determine a first timing advance TA.

34. The method according to any one of claims 29 to 33, wherein: If it is determined that the first access device set is the target access device set, the method further includes: The first access device receives a third channel sent by the terminal device, and the third channel is used for the terminal device to establish an association relationship with the first access device set.

35. The method of claim 34, wherein: The third channel carries an uplink synchronization signal, and the uplink synchronization signal is used for uplink synchronization between the terminal device and the target access device set.

36. The method according to any one of claims 34 to 35, wherein: The third resource occupied by the third channel transmission is determined based on at least one of the following: a first resource and a first offset, wherein the first resource is a resource occupied by transmission of the first channel, and the first offset is an offset of the third resource relative to the first resource in the time domain and / or frequency domain; The third indication information is used to indicate the position and / or size of the third resource in the frequency domain and / or time domain.

37. The method of claim 36, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the first offset; The third indication information.

38. A method according to any one of claims 29 to 37, wherein: The method further comprises: The fourth channel sent by the first access device to the terminal device, the fourth channel is used to carry the first random access configuration information corresponding to the first access device set, and the first random access configuration information is used for the random access process of the terminal device accessing the first access device set.

39. The method of claim 38, wherein: The first random access configuration information includes at least one of the following: A first frequency range, where the first frequency range is a frequency range in which downlink channel transmission occurs during a random access process; The second frequency range is a frequency range in which uplink channel transmission in a random access process occurs.

40. The method according to claim 38 or 39, wherein: The fourth channel is also used to carry at least one of the following: Fourth indication information, where the fourth indication information is used to indicate a time domain position of a fourth resource, where the fourth resource is a resource occupied by transmission of the fourth channel, and the time domain position of the fourth resource is used for time domain positioning; First information, where the first information is used by the terminal device to determine a first TA; Random access response RAR message.

41. The method according to claim 33 or 40, wherein: The first TA is used to adjust the sending time of a first uplink transmission, where the first uplink transmission is the uplink transmission after the first information is received.

42. The method according to any one of claims 38 to 41, wherein: The reception of the fourth channel precedes the sending of the third channel, the third channel is a channel sent by the terminal device to the first access device set when the first access device set is determined to be the target access device set, and the third channel is used for the terminal device to establish an association relationship with the target access device set; or, The transmission of the third channel precedes the reception of the fourth channel.

43. The method according to any one of claims 38 to 40 and 42, wherein: The fourth resource occupied by the transmission of the fourth channel is determined based on at least one of the following: a first resource and a second offset, wherein the first resource is a resource occupied by transmission of the first channel, and the second offset is an offset of the fourth resource relative to the first resource in the time domain and / or frequency domain; a third resource and a third offset, wherein the third resource is a resource occupied by transmission of a third channel before the fourth channel, and the third offset is an offset of the fourth resource relative to the third resource in the time domain and / or frequency domain; fifth indication information, where the fifth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain; A fifth channel is used to schedule the fourth channel.

44. The method of claim 43, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the second offset; the third offset; The fifth indication information.

45. The method of claim 43, wherein: The fifth channel includes at least one of the following: Sixth indication information, where the sixth indication information is used to indicate a position and / or size of the fourth resource in the frequency domain and / or time domain; A fourth offset, where the fourth offset is an offset of the fourth resource relative to the fifth resource occupied by the transmission of the fifth channel in the time domain and / or frequency domain.

46. ​​The method of claim 43, wherein: The fifth resource occupied by the transmission of the fifth channel is determined based on at least one of the following: The first resource and a fifth offset, wherein the fifth offset is an offset of the fifth resource relative to the first resource in the time domain and / or frequency domain; The third resource and a sixth offset, wherein the sixth offset is an offset of the fifth resource relative to the third resource in the time domain and / or frequency domain; seventh indication information, where the seventh indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain; A sixth channel, wherein the sixth channel is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain.

47. The method of claim 43, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the fifth offset; the sixth offset; The seventh indication information.

48. The method of claim 46, wherein: The sixth channel includes at least one of the following: Eighth indication information, where the eighth indication information is used to indicate a position and / or size of the fifth resource in the time domain and / or frequency domain; a seventh offset, where the seventh offset is an offset of the fifth resource relative to a sixth resource occupied by transmission of the sixth channel in the time domain and / or frequency domain; Ninth indication information, the ninth indication information is used to indicate the position of the sixth resource, and the position of the sixth resource is used for time domain positioning and / or frequency domain positioning.

49. The method according to claim 46 or 48, wherein: The sixth resource occupied by the transmission of the sixth channel is determined based on at least one of the following: The first resource and an eighth offset, the eighth offset being an offset of the sixth resource relative to the first resource in the time domain and / or frequency domain; The third resource and a ninth offset, wherein the ninth offset is an offset of the sixth resource relative to the third resource in the time domain and / or frequency domain; The tenth indication information is used to indicate the position and / or size of the sixth resource in the time domain and / or frequency domain.

50. The method of claim 49, wherein: At least one of the following is agreed upon by the protocol or indicated by the first channel: the eighth offset; the ninth offset; The tenth indication information.

51. The method according to any one of claims 29 to 50, wherein: If it is determined that the first access device set is the target access device set, the method further includes: The first access device receives or sends a seventh channel, and the seventh channel is used by the terminal device to update the access devices included in the target access device set.

52. The method of claim 51, wherein: The measurement results corresponding to the candidate access devices in the candidate access device set are used to update the target access device set, and the candidate access device set includes the access devices in the first access device set.

53. The method of claim 52, wherein: The measurement result includes at least one of the following: Reference signal received power RSRP; Signal to Interference plus Noise Ratio SINR.

54. The method of claim 52 or 53, wherein: For a candidate access device in the candidate access device set, the seventh channel includes at least one of the following: Uplink measurement channel; Downlink measurement channel.

55. The method of claim 54, wherein: The downlink measurement channel includes one of the following: the first channel; Channel State Information Reference Signal.

56. The method of claim 54, wherein: The uplink measurement channel includes one of the following: A third channel, wherein the third channel is used for the terminal device to establish an association relationship with the target access device set; Probe reference signal.

57. A terminal device, comprising: A first communication unit is configured to receive at least one first channel sent by a first access device set, wherein the first access device set includes at least one access device, and the at least one first channel sent by the first access device set is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

58. A first access device, comprising: The second communication unit is configured to send a first channel to the terminal device, the first access device belongs to a first access device set, the first access device set includes at least one access device, and the at least one first access device sent by the first access device set The channel is used to determine whether the first access device set is a target access device set, and the target access device set is used to communicate data with the terminal device.

59. A communication device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, and to execute the method as claimed in any one of claims 1 to 28, or to execute the method as claimed in any one of claims 29 to 56.

60. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 28, or executes a method as claimed in any one of claims 29 to 56.

61. A computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the method according to any one of claims 1 to 28, or the method according to any one of claims 29 to 56.

62. A computer program product, comprising computer program instructions, which enable a computer to execute the method according to any one of claims 1 to 28, or to execute the method according to any one of claims 29 to 56.

63. A computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 28, or the method according to any one of claims 29 to 56.

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