CN116420419A

CN116420419A - Initial access method, terminal equipment and network equipment

Info

Publication number: CN116420419A
Application number: CN202180072796.XA
Authority: CN
Inventors: 吴作敏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2023-07-11
Also published as: WO2022155976A1

Abstract

The embodiment of the application provides an initial access method, terminal equipment and network equipment, which can avoid access delay of the terminal equipment and PRACH collision on initial uplink BWP. The initial access method comprises the following steps: the terminal equipment performs initial access according to a first association relationship and/or a second association relationship, wherein the first association relationship comprises an association relationship between initial downlink BWP and uplink BWP, and the second association relationship comprises an association relationship between a public search space set and downlink BWP; wherein, in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two SSBs on the initial downlink BWP associate different uplink BWP; in the second association, the set of public search spaces associated with the initial downlink BWP is on the initial downlink BWP, or the set of public search spaces associated with the at least one SSB on the initial downlink BWP is not on the initial downlink BWP.

Description

Initial access method, terminal equipment and network equipment

Technical Field

The embodiment of the application relates to the field of communication, and more particularly, to an initial access method, terminal equipment and network equipment.

Background

The new air interface (5-Generation New Radio,5G NR) system of the fifth generation mobile communication technology defines a Non-terrestrial network (Non-terrestrial networks, NTN) system deployment scene including a satellite network, and the NTN system can realize the continuity of 5G NR service by means of the wide area coverage capability of the satellite. However, in the NTN scenario, how to perform initial access is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides an initial access method, terminal equipment and network equipment, which can avoid that the load on initial downlink BWP (broadband wireless access point) is too large caused by that the terminal equipment on a plurality of ground cells access the network through the same initial downlink BWP, thereby avoiding increasing the access time delay of the terminal equipment. In addition, the terminal equipment on a plurality of ground cells can be supported to initiate random access through different initial uplink BWPs, so that the PRACH on the initial uplink BWPs is prevented from being seriously collided.

In a first aspect, an initial access method is provided, the method including:

the terminal equipment performs initial access according to a first association relationship and/or a second association relationship, wherein the first association relationship comprises an association relationship between initial downlink BWP and uplink BWP, and the second association relationship comprises an association relationship between a public search space set and downlink BWP;

Wherein,

in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two SSBs on the initial downlink BWP associate different uplink BWP;

in the second association, the set of public search spaces associated with the initial downlink BWP is on the initial downlink BWP, or the set of public search spaces associated with the at least one SSB on the initial downlink BWP is not on the initial downlink BWP.

In a second aspect, an initial access method is provided, the method including:

the network equipment sends first information to the terminal equipment, wherein the first information is used for determining a first incidence relation and/or a second incidence relation of initial access of the terminal equipment, the first incidence relation comprises an incidence relation of initial downlink BWP and uplink BWP, and the second incidence relation comprises an incidence relation of a public search space set and downlink BWP; wherein,

In a third aspect, a terminal device is provided for performing the method in the first aspect.

Specifically, the terminal device comprises functional modules for performing the method in the first aspect described above.

In a fourth aspect, a network device is provided for performing the method in the second aspect.

In particular, the network device comprises functional modules for performing the method in the second aspect described above.

In a fifth aspect, a terminal device is provided comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect.

In a sixth aspect, a network device is provided that includes a processor and a memory. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for performing the method of the second aspect described above.

In a seventh aspect, there is provided an apparatus for implementing the method of any one of the first to second aspects.

Specifically, the device comprises: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method of any of the first to second aspects as described above.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method of any one of the first to second aspects.

In a ninth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects above.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any of the first to second aspects described above.

By the technical scheme, the terminal equipment can perform initial access according to the first association relationship and/or the second association relationship, so that the situation that the load on the initial downlink BWP is too large caused by the fact that the terminal equipment on a plurality of ground cells access the network through the same initial downlink BWP can be avoided, and the access delay of the terminal equipment is prevented from being increased. In addition, the terminal equipment on a plurality of ground cells can be supported to initiate random access through different initial uplink BWPs, so that the PRACH on the initial uplink BWPs is prevented from being seriously collided.

Drawings

Fig. 1A to 1C are schematic diagrams of an application scenario provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a mapping relationship between SSB and RO provided in the present application.

Fig. 3 is a schematic diagram of a beam-laying of an NTN network provided herein.

Fig. 4 is a schematic diagram of a beam-laying of another NTN network provided herein.

Fig. 5 is a schematic flow chart of an initial access method provided according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a first association provided according to an embodiment of the present application.

Fig. 7 is a schematic diagram of another first association provided according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a second association provided according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another second association provided according to an embodiment of the present application.

Fig. 10 is a schematic flow chart diagram of another initial access method provided in accordance with an embodiment of the present application.

Fig. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a network device provided according to an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 14 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 15 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope of the present application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio, NR system evolution system, LTE over unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR over unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., and the embodiments of the present application may also be applied to these communication systems.

In some embodiments, the communication system in the embodiments of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) networking scenario.

In some embodiments, the communication system in the embodiments of the present application may be applied to unlicensed spectrum, where unlicensed spectrum may also be considered as shared spectrum; alternatively, the communication system in the embodiments of the present application may also be applied to licensed spectrum, where licensed spectrum may also be considered as non-shared spectrum.

In some embodiments, the communication system in the embodiments of the present application may be applied to the FR1 frequency band (corresponding to the frequency band range 410MHz to 7.125 GHz), the FR2 frequency band (corresponding to the frequency band range 24.25GHz to 52.6 GHz), and the new frequency band, such as the high frequency band corresponding to the frequency band range 52.6GHz to 71 GHz.

In some embodiments, embodiments of the present application may be applied to Non-terrestrial communication network (Non-Terrestrial Networks, NTN) systems, as well as terrestrial communication network (Terrestrial Networks, TN) systems.

Embodiments of the present application describe various embodiments in connection with network devices and terminal devices, where a terminal device may also be referred to as a User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, user Equipment, or the like.

The terminal device may be a STATION (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) STATION, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In embodiments of the present application, the terminal device may be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like. The terminal device according to the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus, etc. The terminal device may also be fixed or mobile.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In this embodiment of the present application, the network device may be a device for communicating with a mobile device, where the network device may be an Access Point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or an Access Point, a vehicle device, a wearable device, and a network device (gNB) in an NR network, or a network device in a PLMN network for future evolution, or a network device in an NTN network, etc.

By way of example and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. Alternatively, the network device may be a base station disposed on land, in a water area, or the like.

In this embodiment of the present application, a network device may provide a service for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

Fig. 1A is a schematic architecture diagram of a communication system according to an embodiment of the present application. As shown in fig. 1A, the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Fig. 1A illustrates one network device and two terminal devices, alternatively, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within a coverage area, which is not limited by the embodiments of the present application.

Fig. 1B is a schematic architecture diagram of another communication system according to an embodiment of the present application. Referring to FIG. 1B, a terminal device 1101 and a satellite 1102 are included, and wireless communication may be performed between terminal device 1101 and satellite 1102. The network formed between terminal device 1101 and satellite 1102 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 1B, satellite 1102 may have the functionality of a base station and direct communication may be provided between terminal device 1101 and satellite 1102. Under the system architecture, satellite 1102 may be referred to as a network device. Alternatively, a plurality of network devices 1102 may be included in the communication system, and other numbers of terminal devices may be included within the coverage area of each network device 1102, which is not limited in this embodiment of the present application.

Fig. 1C is a schematic architecture diagram of another communication system according to an embodiment of the present application. Referring to fig. 1C, the mobile terminal includes a terminal device 1201, a satellite 1202 and a base station 1203, where wireless communication between the terminal device 1201 and the satellite 1202 is possible, and communication between the satellite 1202 and the base station 1203 is possible. The network formed between the terminal device 1201, the satellite 1202 and the base station 1203 may also be referred to as NTN. In the architecture of the communication system shown in fig. 1C, the satellite 1202 may not have the function of a base station, and communication between the terminal device 1201 and the base station 1203 needs to pass through the transit of the satellite 1202. Under such a system architecture, the base station 1203 may be referred to as a network device. Alternatively, a plurality of network devices 1203 may be included in the communication system, and the coverage area of each network device 1203 may include other number of terminal devices, which is not limited in the embodiment of the present application.

It should be noted that fig. 1A to fig. 1C are only exemplary systems to which the present application is applicable, and of course, the method in the embodiments of the present application may also be applicable to other systems, for example, a 5G communication system, an LTE communication system, etc., which is not limited in particular.

Optionally, the wireless communication system shown in fig. 1A-1C may further include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), and the embodiment of the present application is not limited thereto.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1A as an example, the communication device may include the network device 110 and the terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, or the like.

In the embodiment of the present application, the "predefining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the specific implementation of the present application is not limited. Such as predefined may refer to what is defined in the protocol.

In this embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

To facilitate a better understanding of embodiments of the present application, NTNs relevant to the present application are described.

NTN typically provides communication services to terrestrial users by way of satellite communications. Satellite communications have many unique advantages over terrestrial cellular communications. First, satellite communications are not limited by the user region, for example, general land communications cannot cover areas where communication devices cannot be installed, such as oceans, mountains, deserts, etc., or communication coverage is not performed due to rarity of population, while for satellite communications, since one satellite can cover a larger ground, and the satellite can orbit around the earth, theoretically every corner on the earth can be covered by satellite communications. And secondly, satellite communication has great social value. Satellite communication can be covered in remote mountain areas, poor and backward countries or regions with lower cost, so that people in the regions enjoy advanced voice communication and mobile internet technology, and the digital gap between developed regions is reduced, and the development of the regions is promoted. Again, the satellite communication distance is far, and the cost of communication is not obviously increased when the communication distance is increased; and finally, the satellite communication has high stability and is not limited by natural disasters.

Communication satellites are classified into Low Earth Orbit (LEO) satellites, medium Earth Orbit (MEO) satellites, geosynchronous Orbit (Geostationary Earth Orbit, GEO) satellites, high elliptical Orbit (High Elliptical Orbit, HEO) satellites, and the like according to the Orbit heights.

The low orbit satellite (LEO) altitude range is 500 km-1500 km, with corresponding orbit periods of about 1.5 hours-2 hours. The signal propagation delay for single hop communications between users is typically less than 20ms. The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is less, and the requirement on the transmitting power of the user terminal equipment is not high.

Geosynchronous orbit (GEO) satellites have an orbit height of 35786km and a period of 24 hours around the earth. The signal propagation delay for single hop communications between users is typically 250ms.

In order to ensure the coverage of the satellite and improve the system capacity of the whole satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form tens or hundreds of beams to cover the ground; a satellite beam may cover a ground area of several tens to hundreds of kilometers in diameter.

For better understanding of the embodiments of the present application, an initial access procedure in an NR system related to the present application is described.

In an NR system, the initial access procedure of a terminal device can be accomplished by detecting a burst set of synchronization signal blocks (Synchronization Signal/PBCH Block, SSB or SS/PBCH Block). One or more SSBs may be included in one SSB burst set, wherein one SSB includes 4 symbols in the time domain. One SSB burst set should complete transmission within one half frame (5 ms).

For the Frequency range 1 (Frequency range 1, fr 1), there are at most 8 SSBs in one SSB burst set, and at most 3 bits (bits) are needed to indicate indexes of the 8 SSBs, where the 3 bits are implicitly carried by demodulation reference signal (Demodulation Reference Signal, DMRS) sequences of physical broadcast channels (Physical Broadcast Channel, PBCH), and there are 8 different DMRS sequences of PBCH, respectively corresponding to the 8 different SSB indexes. For the Frequency range 2 (Frequency range 2, fr 2) band, up to 64 SSBs can be configured, and the index of these 64 SSBs needs to be indicated by 6 bits, the lower 3 bits of these 6 bits are still carried by the DMRS sequence of the PBCH, and the additional higher 3 bits are indicated directly by the payload content of the PBCH.

One of the main functions of the SSB index is to allow the UE to acquire system timing information, and in addition, the SSB index has another function of indicating a Quasi co-location (QCL) relationship between SSBs. The QCL relationship between signals is used to describe the degree of similarity of their large scale parameter characteristics, and if the relationship between two signals is QCL, the large scale parameters of the two signals can be considered similar. Specifically, for SSB, SSBs carried by different beams in the 5G NR system form an SSB burst set, and different SSB indexes correspond to different SSB time domain location information in the burst set and also correspond to specific SSB transmission beam information. SSBs having the same SSB index may be considered to have QCL relationships, and the terminal device may assume that the network device employs the same beam for transmitting the SSBs; QCL relationships are not considered to exist between SSBs corresponding to different SSB indices because they may come from different transmission beams of the network device, experiencing different channel transmission characteristics.

During initial access, the terminal device attempts to search for SSBs by predefining their possible time-frequency locations, and obtains time and frequency synchronization, radio frame timing, and cell Identification (ID) by the detected SSBs. Further, the terminal device can obtain the resource configuration in the random access process according to the received system message of the cell. The random access is a very important process in the initial access process, and the random access process takes on functions of beam management, request of system message, and the like in addition to the functions of establishing radio resource control (Radio Resource Control, RRC) connection, maintaining uplink synchronization, cell handover, and the like.

The resource configuration in the random access procedure includes a physical random access channel (Physical Random Access Channel, PRACH) resource configuration, also referred to as PRACH transmission opportunity (RO). The RO is a time-frequency resource carrying a random access Preamble sequence (Preamble). If two-step random access procedure transmission is supported, the resource configuration in the random access procedure also includes physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) resource configuration, also referred to as PUSCH transmission opportunity (PO). The message a (MsgA) in the two-step random access procedure includes an MsgA Preamble and an MsgA PUSCH, RO is a time-frequency resource for carrying the MsgA Preamble, and PO is a time-frequency resource for carrying the MsgA PUSCH.

The NR system is characterized by supporting downlink multi-beam. Before the network device communicates with the terminal device, the network device needs to know the beam in which the terminal device is located and set a proper beam direction in a subsequent data transmission process. Since the PRACH in the random access process is the first piece of information sent by the terminal device to the network device, the function of reporting the beam where the terminal device is located can be carried by the PRACH. Specifically, it may be determined by a mapping relationship between SSB and RO. Wherein, in the NR system, the following proportional relation of mapping between SSB and RO is supported: 1) Mapping one to one; 2) Many-to-one mapping; 3) One-to-many mapping. Fig. 2 shows a schematic diagram of a mapping relationship between SSB and RO, where SSB is on a downstream initial bandwidth Part (BWP) (i.e., downstream bwp#0) and RO is on an upstream initial BWP (i.e., upstream bwp#0). SSB and RO representation of the same pattern have a mapping relationship.

Before the terminal equipment initiates random access, the terminal equipment performs measurement and evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. When the SSB signal detection strength exceeds the threshold, after determining that ssb#1 is the SSB with the strongest signal, for example, the terminal device determines that ssb#1 is the SSB with the strongest signal, the terminal device determines that the PRACH transmission opportunity corresponding to ssb#1 includes ro#1 according to the mapping relationship between SSB and RO, and sends a Preamble on the ro#1. If the network device successfully receives the Preamble, the network device may learn the SSB selected by the terminal device based on the resource information of the successfully received Preamble, for example, the network device may determine that the Preamble is associated with the ssb#1 according to the association relationship, so that beam information corresponding to subsequent communication may be determined according to the ssb#1.

The four-step random access procedure (Type-1 random access procedure) may include the steps of:

in a first step, the terminal device sends a random access Preamble sequence (Preamble, also referred to as Msg 1) to the network device on PRACH resources on the initial uplink BWP.

In the second step, after detecting the Msg1, the network device sends a physical downlink control channel (Physical Downlink Control Channel, PDCCH) scrambled by a random access radio network temporary identifier (Random Access Radio Network Temporary Identity, RA-RNTI) to the terminal device through a resource in a Type (Type) 1-PDCCH common search space (Common Search Space, CSS) on the initial downlink BWP, and the PDSCH scheduled by the PDCCH may include a random access response (RAR, also referred to as Msg 2) corresponding to the Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH using the RA-RNTI on the Type1-PDCCH CSS on the initial downlink BWP, and determines whether a random access response (Random Access Response, RAR) transmitted to itself by the network device is included according to a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) scheduled by the PDCCH after detecting the PDCCH. The RAR may include information such as uplink grant of message 3 (Msg 3), timing advance command (TA command), temporary cell radio network temporary identifier (Temporary Cell Radio Network Temporary Identity, TC-RNTI), and the like. The Type1-PDCCH CSS is configured by the network equipment through a system message and/or a high-layer parameter.

And thirdly, after receiving the RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the RAR. This step supports hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) retransmissions. If the network device did not properly receive Msg3, the network device may schedule retransmission of Msg3 using the PDCCH of the TC-RNTI scrambling code. The PDCCH may carry DCI corresponding to downlink control information (Downlink Control Information, DCI) format 0_0.

Fourth, the network device sends a message 4 (Msg 4) to the terminal device, including a contention resolution message, which supports HARQ retransmission. If the terminal device did not properly receive Msg4, the network device may schedule retransmission of Msg4 using the PDCCH of the TC-RNTI scrambling code. Wherein, the PDCCH may carry DCI corresponding to DCI format 1_0. If the terminal equipment correctly receives the Msg4 and determines that the Msg4 is the message of the terminal equipment, the random access process of the terminal equipment is successful, otherwise, the random access process fails. The terminal device needs to initiate the random access procedure again starting from the first step.

The two-step random access procedure (Type-2 random access procedure) may include the steps of:

in a first step, the terminal device sends a message a (MsgA) to the network device on RO and PO on an initial upstream BWP, wherein MsgA comprises an MsgA Preamble and an MsgA PUSCH.

In the second step, after detecting the MsgA, the network device sends a PDCCH scrambled by the MsgB-RNTI to the terminal device through a resource in a Type1-PDCCH Common Search Space (CSS) on the initial downlink BWP, and the PDSCH scheduled by the PDCCH may include a random access response (also referred to as MsgB) corresponding to the MsgA sent by the terminal device. If the network device only detects the MsgA Preamble and does not receive the MsgA PUSCH, the PDSCH scheduled by the PDCCH may include a fallback RAR corresponding to the MsgA Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH using the MsgB-RNTI on the Type1-PDCCH CSS on the initial downlink BWP, and determines whether to include a success RAR (successRAR) or a fallback RAR sent by the network device to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. If the terminal equipment receives the successful RAR correctly, the terminal equipment feeds back Acknowledgement (ACK) information to the network equipment, and the random access process of the terminal equipment is successful. Or if the terminal equipment receives the rollback RAR, after receiving the rollback RAR, the terminal equipment sends Msg3 on the uplink resource indicated by the rollback RAR, and the two-step random access process is rolled back to the four-step random access process. Or if the terminal device does not receive any RAR, the random access procedure fails, and the terminal device needs to initiate the random access procedure again from the first step.

For better understanding of the embodiments of the present application, a beam network deployment scenario under NR-NTN related to the present application will be described.

The beam network deployment in the NR-NTN scene comprises the following two cases:

case 1: as shown in fig. 3. One SSB corresponds to one terrestrial cell, or the beam width of SSB transmission coincides with the beam width of data transmission. One terrestrial cell corresponds to one BWP for data transmission. After the terminal device accesses the network through the SSB on the initial BWP (i.e., bwp#0), the network device configures the terminal device with the BWP corresponding to the SSB when the terminal device accesses for data transmission. In addition, as shown in fig. 3, channel state information reference signals (Channel State Information Reference Signal, CSI-RS) may also be transmitted in Downlink (DL) bwp#1 to DL bwp#3, and the beam width and beam direction of the CSI-RS transmission coincide with those of the data transmission. As an example, the beam width and beam direction of the CSI-RS on DL BWP #2 of cell #1 are the same as those of SSB #1 of cell # 1.

Case 2: as shown in fig. 4. One SSB corresponds to a plurality of terrestrial cells, or the beam width of SSB transmission is inconsistent with the beam width of data transmission, or the beam width of SSB transmission is greater than the beam width of data transmission. One terrestrial cell corresponds to one BWP for data transmission. After the terminal device accesses the network through the SSB on the initial BWP (i.e., bwp#0), the network device configures the terminal device with the BWP corresponding to the SSB when the terminal device accesses for data transmission. Further, as shown in fig. 4, CSI-RS may also be transmitted in DL bwp#1 to DL bwp#3, and the beam width and beam direction of the CSI-RS transmission coincide with those of the data transmission. As an example, the beam of ssb#1 of cell#1 includes beams of CSI-RS on DL bwp#1, CSI-RS on DL bwp#2, and CSI-RS on DL bwp#3 of cell#1. In some cases, such a scene may also be referred to as an umbrella beam scene.

In NR-NTN system, two kinds of network distribution scenes are supported at present. However, in the above-mentioned network deployment scenario, if the terminal device further extends the initial access procedure in the prior art, the terminal devices on multiple terrestrial cells may access the network through the same initial downlink BWP, which may cause a load on the initial downlink BWP to be too large, thereby increasing the access delay of the terminal device. In addition, if the terminal devices on the multiple terrestrial cells initiate random access through the same initial uplink BWP, the PRACH collision on the initial uplink BWP may be more serious. The present application mainly considers the enhancement of initial access procedures in NR-NTN systems.

Based on the above-mentioned problems, the present application proposes a random access scheme, which can avoid that the load on the initial downlink BWP caused by the terminal devices on multiple terrestrial cells through the same initial downlink BWP access network is too large, so as to avoid increasing the access delay of the terminal devices. In addition, the terminal equipment on a plurality of ground cells can be supported to initiate random access through different initial uplink BWPs, so that the PRACH on the initial uplink BWPs is prevented from being seriously collided.

The technical scheme of the present application is described in detail below through specific embodiments.

Fig. 5 is a schematic flow chart of an initial access method 200 according to an embodiment of the present application, as shown in fig. 5, the method 200 may include at least some of the following:

s210, the terminal equipment performs initial access according to a first association relationship and/or a second association relationship, wherein the first association relationship comprises an association relationship between initial downlink BWP and uplink BWP, and the second association relationship comprises an association relationship between a public search space set and downlink BWP; wherein, in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two SSBs on the initial downlink BWP associate different uplink BWP; in the second association, the set of public search spaces associated with the initial downlink BWP is on the initial downlink BWP, or the set of public search spaces associated with the at least one SSB on the initial downlink BWP is not on the initial downlink BWP.

In some embodiments, embodiments of the present application may be applied to NTN networks. Of course, the embodiments of the present application may also be applied to other networks, which are not limited in this application.

In some embodiments, in the case that the initial downlink BWP in the first association relationship is associated with an initial uplink BWP, multiple SSBs on the initial downlink BWP are associated with the same initial uplink BWP, and/or multiple terrestrial cells corresponding to multiple SSBs on the initial downlink BWP are associated with the same initial uplink BWP.

In some embodiments, one BWP includes all Resource Blocks (RBs) included in one carrier.

In some embodiments, one BWP includes a portion of RBs included in one carrier, wherein the portion of RBs is contiguous in the frequency domain.

In some embodiments, in the first association, the initial downstream BWP is associated with an initial upstream BWP, wherein,

the SSB-associated ROs on the initial downstream BWP are on the initial upstream BWP; and/or the number of the groups of groups,

the SSB-associated ROs and POs on the initial downstream BWP are on the initial upstream BWP.

For example, as shown in fig. 6, ssb#0 on DL bwp#0 (initial downlink BWP) is associated with ro#0 on UL bwp#0 (initial uplink BWP), ssb#1 on DL bwp#0 (initial downlink BWP) is associated with ro#1 on UL bwp#0 (initial uplink BWP), and ssb#2 on DL bwp#0 (initial downlink BWP) is associated with ro#2 on UL bwp#0 (initial uplink BWP). That is, an initial downstream BWP associates an initial upstream BWP on which the SSB-associated RO on the initial downstream BWP is. In some embodiments, in a case where at least two SSBs on the initial downlink BWP in the first association relationship are associated with different uplink BWP, different SSBs on the initial downlink BWP are associated with different uplink BWP, and/or a plurality of terrestrial cells corresponding to a plurality of SSBs on the initial downlink BWP are associated with different uplink BWP.

In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including:

a first SSB on the initial downstream BWP associates a first upstream BWP, wherein the first SSB-associated RO is on the first upstream BWP and/or the first SSB-associated RO and PO are on the first upstream BWP;

a second SSB on the initial downstream BWP associates a second upstream BWP, wherein the second SSB-associated RO is on the second upstream BWP and/or the second SSB-associated RO and PO are on the second upstream BWP.

In some embodiments, the first uplink BWP and the second uplink BWP are initial uplink BWP corresponding to different terminal equipments, respectively, e.g., for UE1, the initial uplink BWP is the first uplink BWP; for UE2, its initial uplink BWP is the second uplink BWP.

For example, as shown in fig. 7, ssb#0 on DL bwp#0 (initial downlink BWP) is associated with ro#0 on UL bwp#1, ssb#1 on DL bwp#0 (initial downlink BWP) is associated with ro#1 on UL bwp#2, ssb#2 on DL bwp#0 (initial downlink BWP) is associated with ro#2 on UL bwp#3. That is, different SSBs on the initial downstream BWP are associated with different upstream BWP.

In some embodiments, the association of SSB and RO is determined based on at least one of SSB index, RO resource, and antenna polarization mode.

In some embodiments, the antenna polarization mode includes at least one of right-hand polarization (Right Hand Circular Polarization, RHCP), left-hand polarization (Left Hand Circular Polarization, LHCP), and linear polarization (Linear Polarization, LP). Wherein RHCP and LHCO may also be referred to as circular polarization.

In some embodiments, the SSB index has an association with the antenna polarization pattern. The association relationship may be predefined or determined based on at least one of system messages, RRC signaling, MAC CE and DCI transmitted by the network device.

As an example, in the case where the network device configures a circularly polarized antenna, SSBs corresponding to even indexes are associated with RHCP patterns, and SSBs corresponding to odd indexes are associated with LHCP patterns.

As an example, where a network device is configured with a linearly polarized antenna or is not configured with a circularly polarized antenna, all SSBs transmitted by the network device are associated with LP modes.

In some embodiments, RO resources have an association with antenna polarization patterns. The association relationship may be predefined or determined based on at least one of system messages, RRC signaling, MAC CE and DCI transmitted by the network device.

As an example, a part of RO resources are associated with RHCP mode, another part of RO resources are associated with LHCP mode, and yet another part of RO resources are associated with LP mode.

As an example, in case the network device configures a circularly polarized antenna, a part of RO resources are associated with RHCP mode and another part of RO resources are associated with LHCP mode.

As an example, in case the network device is configured with linearly polarized antennas or is not configured with circularly polarized antennas, all RO resources are associated with LP mode.

In some embodiments, SSB index, RO resources have an association with antenna polarization pattern. The association relationship may be predefined or determined based on at least one of system messages, RRC signaling, MAC CE and DCI transmitted by the network device.

As an example, the SSB index has an association with the antenna polarization pattern, and correspondingly, the RO resource having an association with the SSB index also has an association with the antenna polarization pattern.

As an example, during an initial access procedure, the terminal device may perform measurement evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. Wherein, SSB corresponding to the odd index is associated with RHCP mode, SSB corresponding to the even index is associated with LHCP mode. After detecting the SSB, for example, assuming that the terminal device detects ssb#1 having an SSB signal strength exceeding a threshold, the terminal device may determine that an antenna mode corresponding to the network device when transmitting ssb#1 is RHCP mode.

As an example, before the terminal device initiates random access, the terminal device may perform measurement evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. Under the condition that the detection strength of the SSB signal exceeds a threshold, after determining that the SSB with the strongest or stronger signal, for example, the terminal equipment determines that SSB#1 on the initial downlink BWP is the SSB with the strongest signal, the terminal equipment determines that the PRACH transmission opportunity corresponding to the SSB#1 comprises RO#1 and RO#1 'on the initial uplink BWP according to the mapping relation between the SSB and the RO in the first association relation, wherein RO#1 corresponds to the RHCP mode and RO#1' corresponds to the LHCP mode. Since the terminal device supports LHCP mode, the terminal device may transmit PRACH to the network device through the resource in RO # 1'.

In some embodiments, the antenna polarization mode is indicated to the terminal device by the network device. For example, the network device indicates to the terminal device the corresponding antenna polarization mode for SSB transmission, or for physical signal or physical channel transmission on DL BWP, or indicates the corresponding antenna polarization mode for terminal device when physical signal or physical channel transmission on UL BWP is performed.

In some embodiments, the antenna polarization pattern is reported by the terminal device to the network device. For example, the terminal device reports to the network device the antenna polarization mode supported by the terminal device.

In some embodiments, the first association is predefined or determined based on first configuration information sent by the network device, wherein the first configuration information is transmitted through at least one of a system message, radio resource control (Radio Resource Control, RRC) signaling, a medium access control element (Media Access Control Control Element, MAC CE), and downlink control information (Downlink Control Information, DCI).

In some embodiments, the first configuration information includes random access configuration information, where the random access configuration information includes uplink BWP information associated with the random access configuration and/or SSB index associated with the random access configuration.

As an example, the random access configuration information includes configuration information of an uplink BWP associated with the random access configuration, where the configuration information of the uplink BWP includes at least one of the following: an Identification (ID) of the uplink BWP, a starting position of the uplink BWP, a frequency domain range (or a number of frequency domain RBs included in the uplink BWP) corresponding to the uplink BWP, a subcarrier spacing (Subcarrier spacing, SCS) corresponding to the uplink BWP, or a Cyclic Prefix (CP) type.

In the initial access phase, the terminal device has not established an RRC connection with the network device, and the terminal device is not configured with a user-specific control channel, but needs to receive common control information in the cell through a common control channel on the initial downlink BWP, thereby completing a subsequent initial access procedure. The terminal device receives a common control channel through a common search space (Common Search Space, CSS), wherein the common search space is configured through a system message or RRC signaling.

Wherein the public search space related to the initial access mainly comprises the following:

type0-PDCCH CSS: type0-PDCCH is used to indicate scheduling information of PDSCH carrying system information block (System Information Block, SIB) 1, its search space is indicated by PDCCH SIB1 configuration (PDCCH-ConfigSIB 1) information field in the master information block (Master Information Block, MIB) information, or by RRC signaling configuration, its cyclic redundancy check (Cyclical Redundancy Check, CRC) of DCI format is scrambled by system information-radio network temporary identity (System Information Radio Network Temporary Identity, SI-RNTI).

Type0A-PDCCH CSS: type0A-PDCCH is used to indicate scheduling information of PDSCH carrying other system information (Other System Information, OSI), its search space is configured by RRC signaling, and CRC of its DCI format is scrambled by SI-RNTI.

Type1-PDCCH CSS: type1-PDCCH is used to indicate scheduling information of PDSCH carrying RAR, its search space is configured by RRC signaling, CRC of its DCI format is scrambled by random access-radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI), message B-radio network temporary identity (MsgB Radio Network Temporary Identity, msgB-RNTI), or temporary cell-radio network temporary identity (Temporary Cell Radio Network Temporary Identity, TC-RNTI).

Type2-PDCCH CSS: the type2-PDCCH is used to indicate scheduling information of PDSCH carrying paging message, its search space is configured through RRC signaling, and CRC of its DCI format is scrambled through paging-radio network temporary identity (Paging Radio Network Temporary Identity, P-RNTI).

Through different CSSs, the terminal device may detect the PDCCH according to the control channel resource set of the PDCCH at a corresponding PDCCH listening occasion.

In some embodiments, the common set of search spaces includes, but is not limited to, at least one of:

type0-PDCCH CSS set, type0A-PDCCH CSS set, type1-PDCCH CSS set, type2-PDCCH CSS set.

In some embodiments, in a case where the common search space set associated with the initial downlink BWP in the second association relationship is on the initial downlink BWP, CSSs respectively associated with the SSBs on the initial downlink BWP are on the initial downlink BWP. For example, as shown in fig. 8, CSSs respectively associated with ssb#0, ssb#1, and ssb#2 on DL bwp#0 (initial downlink BWP) are on the DL bwp#0 (initial downlink BWP). CSS associated with ssb#0, ssb#1, and ssb#2, respectively, is a common search space set associated with the DL bwp#0.

In some embodiments, in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising:

the first SSB on the initial downstream BWP is associated with a first downstream BWP, wherein the first SSB-associated common search space is aggregated on the first downstream BWP, which is a different downstream BWP than the initial downstream BWP.

It should be noted that, different downlink BWP may refer to: BWP Identification (ID) is different, or frequency domain resources corresponding to BWP are different, or subcarrier spacing corresponding to BWP is different.

In some embodiments, the CSS of one SSB association on the initial downstream BWP is on the downstream BWP of the SSB association if the common search space set of at least one SSB association on the initial downstream BWP in the second association is not on the initial downstream BWP. For example, as shown in fig. 9, the CSS of ssb#0 association on DL bwp#0 (initial downlink BWP) is on DL bwp#1 associated with ssb#0, the CSS of ssb#1 association on DL bwp#0 (initial downlink BWP) is on DL bwp#2 associated with ssb#1, and the CSS of ssb#2 association on DL bwp#0 (initial downlink BWP) is on DL bwp#3 associated with ssb#2. CSS associated with ssb#0, ssb#1, and ssb#2, respectively, is a common search space set associated with the DL bwp#0.

In some embodiments, the second association is predefined or determined based on second configuration information sent by the network device, wherein the second configuration information is transmitted through at least one of a system message, RRC signaling, MAC CE, and DCI.

In some embodiments, the second configuration information includes PDCCH common configuration information including downlink BWP information corresponding to the PDCCH common configuration and/or SSB index corresponding to the PDCCH common configuration, wherein the PDCCH common configuration includes a configuration of the common search space set. In some embodiments, in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and the step S210 may specifically include:

in the Type-1 random access procedure, the terminal device sends a first PRACH corresponding to message 1 (Msg 1) through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP; or,

in the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to a message a (MsgA) through a first RO on the initial uplink BWP, and sends a first PUSCH corresponding to the message a (MsgA) through a first PO on the initial uplink BWP, wherein the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP; or,

In the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to message a (MsgA) through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP. In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downstream BWP; the step S210 may specifically include:

in the Type-1 random access process, the terminal equipment sends a first PRACH corresponding to message 1 (Msg 1) through a first RO on the first uplink BWP; or,

in the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to a message a (MsgA) through a first RO on the first uplink BWP, and sends a first PUSCH corresponding to the message a (MsgA) through a first PO on the first uplink BWP, where the first PO is associated with the first RO; or,

in the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to message a (MsgA) through a first RO on the first uplink BWP.

In some embodiments, a first SSB on the initial downstream BWP is associated with a first upstream BWP, and the first RO on the first upstream BWP is associated with the first SSB on the initial downstream BWP.

In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downstream BWP; the step S210 may specifically include:

in the random access process of Type-1, the terminal device sends a first PUSCH corresponding to message 3 (Msg 3) through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by uplink grant information in an RAR corresponding to message 2 (Msg 2); or,

in the Type-2 random access process, the terminal device sends a first physical uplink control channel (Physical Uplink Control Channel, PUCCH) corresponding to a message B (MsgB) through a PUCCH resource on the first uplink BWP, where the first PUCCH includes response information corresponding to the message B (MsgB); or,

in the Type-2 random access process, the terminal device sends a first PUSCH corresponding to a message B (MsgB) through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by uplink grant information in a fallback RAR corresponding to the message B (MsgB).

In some embodiments, in the first association, the initial access downlink bandwidth, for example, the initial downlink BWP, is associated with the initial access uplink bandwidth, for example, the initial uplink BWP, and the S210 may specifically include:

the terminal equipment sends PRACH through PRACH resource on the initial access uplink bandwidth; and/or the number of the groups of groups,

the terminal equipment sends a PUSCH corresponding to the Msg3 through the PUSCH resource on the initial access uplink bandwidth; and/or the number of the groups of groups,

the terminal equipment sends a PUSCH corresponding to the MsgB through the PUSCH resource on the initial access uplink bandwidth; and/or the number of the groups of groups,

and the terminal equipment sends the PUCCH corresponding to the MsgB through the PUCCH resource on the initial access uplink bandwidth.

In some embodiments, in the first association, the synchronization signal on the initial access downlink bandwidth, for example, the first SSB on the initial downlink BWP, is associated with a first uplink bandwidth, for example, the first uplink BWP, and the S210 specifically may include:

the terminal equipment sends PRACH through PRACH resource on the first uplink bandwidth; and/or the number of the groups of groups,

the terminal equipment sends a PUSCH corresponding to the Msg3 through the PUSCH resource on the first uplink bandwidth; and/or the number of the groups of groups,

the terminal equipment sends a PUSCH corresponding to the MsgB through the PUSCH resource on the first uplink bandwidth; and/or the number of the groups of groups,

And the terminal equipment sends the PUCCH corresponding to the MsgB through the PUCCH resource on the first uplink bandwidth.

In some embodiments, in the second association, an initial access downlink bandwidth, for example, a common search space set associated with the initial downlink BWP, is set on the initial access downlink bandwidth, and the S210 may specifically include:

the terminal device detects a PDCCH candidate in the CSS set on the initial access downlink bandwidth.

In some embodiments, in the second association, an initial access downlink bandwidth, for example, the common search space associated with the initial downlink BWP, is set on a first downlink bandwidth, where the initial access downlink bandwidth and the first downlink bandwidth are different (for example, at least one of parameters corresponding to the initial access downlink bandwidth and parameters corresponding to the first downlink bandwidth are different), and the step S210 may specifically include:

the terminal device detects PDCCH candidates in the CSS set on the first downlink bandwidth.

In some embodiments, in the second association, the common search space associated with the initial downlink BWP is collected on the initial downlink BWP, and S210 may specifically include at least one of the following cases:

the common search space set comprises a Type0-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0-PDCCH CSS set on the initial downlink BWP by using SI-RNTI;

The common search space set comprises a Type0A-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0A-PDCCH CSS set on the initial downlink BWP by using SI-RNTI;

the common search space set comprises a Type1-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type1-PDCCH CSS set on the initial downlink BWP by using RA-RNTI, msgB-RNTI or TC-RNTI;

the common search space set includes a Type2-PDCCH CSS set, and the terminal device detects PDCCH candidates in the Type2-PDCCH CSS set on the initial downlink BWP using a P-RNTI.

In some embodiments, in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: the first SSB-associated common search space on the initial downlink BWP is collected at a first downlink BWP, the first downlink BWP and the initial downlink BWP being different downlink BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downlink BWP; the step S210 may specifically include at least one of the following:

the common search space set comprises a Type0-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0-PDCCH CSS set on the first downlink BWP by using SI-RNTI;

The common search space set comprises a Type0A-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0A-PDCCH CSS set on the first downlink BWP by using SI-RNTI;

the common search space set comprises a Type1-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type1-PDCCH CSS set on the first downlink BWP by using RA-RNTI, msgB-RNTI or TC-RNTI;

the common search space set includes a Type2-PDCCH CSS set, and the terminal device detects PDCCH candidates in the Type2-PDCCH CSS set on the first downlink BWP using a P-RNTI.

It should be noted that, for PDCCH, the network device is transmitting PDCCH, for example, the network device transmits the SI-RNTI scrambled PDCCH through the resources in the Type0-PDCCH CSS set on the initial downlink BWP. For PDCCH, since the terminal device is blind, may or may not detect, the terminal device detects one PDCCH candidate, e.g., the terminal device detects the PDCCH candidate in the Type0-PDCCH CSS set on the first downlink BWP using SI-RNTI.

As embodiment 1, in the first association relationship, an initial downlink BWP associates an initial uplink BWP, and specifically, an RO associated with an SSB on the initial downlink BWP is on the initial uplink BWP; and/or SSB-associated ROs and POs on the initial downstream BWP are on the initial upstream BWP; in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP. The random access procedure is described as an example.

In embodiment 1, before the terminal device initiates random access, the terminal device performs measurement evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. When the SSB signal detection strength exceeds the threshold, after determining that the ssb#1 on the initial downlink BWP is the SSB with the strongest signal, for example, the terminal device determines that the PRACH transmission opportunity corresponding to the ssb#1 includes ro#1 on the initial uplink BWP according to the mapping relationship between the SSB and the RO in the first association relationship.

In embodiment 1, the four-step random access procedure (Type-1 random access procedure) may include the steps of:

in a first step, the terminal device sends a random access Preamble sequence (Preamble, also called Msg 1) to the network device on PRACH resources corresponding to ro#1 on the initial upstream BWP.

In the second step, after detecting the Msg1, the network device sends the PDCCH scrambled by the RA-RNTI to the terminal device through the resource in the Type1-PDCCH CSS on the downlink bwp#2 (in the second association relationship, the downlink BWP associated with the ssb#1), where the PDSCH scheduled by the PDCCH may include a random access response (RAR, also referred to as Msg 2) corresponding to the Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH candidates on the Type1-PDCCH CSS on the downlink bwp#2 using the RA-RNTI, and determines whether the network device is included or not to transmit the RAR to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. The RAR may include information such as uplink grant of message 3 (Msg 3), timing advance command (TA command), TC-RNTI, and the like. The Type1-PDCCH CSS is configured by the network equipment through a system message and/or a high-layer parameter.

And thirdly, after receiving the RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the RAR. Wherein the uplink resource may be located on the initial uplink BWP or on the uplink BWP associated with the ssb#1. This step supports HARQ retransmissions. If the network device did not properly receive Msg3, the network device may schedule retransmission of Msg3 using the PDCCH of the TC-RNTI scrambling code. Wherein, DCI format 0_0 may be carried in the PDCCH. The PDCCH of the TC-RNTI scrambling code is transmitted through a Type1-PDCCH CSS on the downlink BWP#2.

Fourth, the network device transmits a message 4 (Msg 4) to the terminal device through the resources in the Type1-PDCCH CSS on the downlink bwp#2, including a contention resolution message, which supports HARQ retransmission. If the terminal device did not properly receive Msg4, the network device may schedule retransmission of Msg4 using the PDCCH of the TC-RNTI scrambling code. Wherein, DCI format 1_0 may be carried in the PDCCH. The PDCCH of the TC-RNTI scrambling code is transmitted through a Type1-PDCCH CSS on the downlink BWP#2. If the terminal equipment correctly receives the Msg4 and determines that the Msg4 is the message of the terminal equipment, the random access process of the terminal equipment is successful, otherwise, the random access process fails. The terminal device needs to initiate a four-step random access procedure (Type-1 random access procedure) again from the first step.

In embodiment 1, the two-step random access procedure (Type-2 random access procedure) may include the steps of:

first, the terminal device sends a message a (MsgA) to the network device on the RO corresponding to RO #1 and its associated PO on the initial upstream BWP, wherein the MsgA includes an MsgA Preamble and an MsgA PUSCH.

In the second step, after detecting the MsgA, the network device sends the PDCCH scrambled by the MsgB-RNTI to the terminal device through the resource in the Type1-PDCCH CSS on the downlink bwp#2, and the PDSCH scheduled by the PDCCH may include a random access response (also referred to as MsgB) corresponding to the MsgA sent by the terminal device. If the network device only detects the MsgA Preamble and does not receive the MsgA PUSCH, the PDSCH scheduled by the PDCCH may include a fallback RAR corresponding to the MsgA Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH using the MsgB-RNTI on the Type1-PDCCH CSS on the downlink bwp#2, and determines whether to include a success RAR (successRAR) or a fallback RAR that the network device transmits to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. If the terminal device correctly receives the successful RAR, the terminal device feeds back ACK information to the network device, wherein the ACK information may be transmitted through the initial uplink BWP or through the uplink BWP associated with the ssb#1, and the random access procedure of the terminal device is successful. Or if the terminal device receives the fallback RAR, the terminal device sends Msg3 on an uplink resource indicated by the fallback RAR after receiving the fallback RAR, where the uplink resource may be located on an initial uplink BWP or an uplink BWP associated with the ssb#1, and the two-step random access procedure (Type-2 random access procedure) is fallback to the four-step random access procedure (Type-1 random access procedure). Or if the terminal device does not receive any RAR, the random access procedure fails, and the terminal device needs to initiate a two-step random access procedure (Type-2 random access procedure) again from the first step.

As embodiment 2, in the first association relationship, at least two SSBs on the initial downlink BWP associate different uplink BWP; in the second association, the common search space associated with the initial downlink BWP is collected on the initial downlink BWP. The random access procedure is described as an example.

In embodiment 2, before the terminal device initiates random access, the terminal device performs measurement evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. When the SSB signal detection strength exceeds the threshold, after determining that ssb#1 on the initial downlink BWP is the SSB with the strongest signal, for example, the terminal device determines that the PRACH transmission opportunity corresponding to ssb#1 includes ro#1 on the uplink BWP associated with ssb#1 (for example, the initial uplink BWP associated with ssb#1) according to the mapping relationship between SSB and RO in the first association relationship.

In embodiment 2, the four-step random access procedure (Type-1 random access procedure) may include the steps of:

in a first step, the terminal device sends a random access Preamble sequence (also called Msg 1) to the network device on PRACH resources of the corresponding ro#1 on the upstream BWP associated with ssb#1.

In the second step, after detecting Msg1, the network device sends the PDCCH scrambled by the RA-RNTI to the terminal device through the resources in the Type1-PDCCH CSS on the initial downlink BWP (in the second association relationship, the downlink BWP associated with ssb#1), and the PDSCH scheduled by the PDCCH may include a random access response (RAR, also referred to as Msg 2) corresponding to the Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH candidates on the Type1-PDCCH CSS on the initial downlink BWP by using the RA-RNTI, and determines whether the network device is included or not to transmit the RAR to the terminal device according to the PDSCH scheduled by the PDCCH after the PDCCH is detected. The RAR may include information such as an uplink grant of message 3 (Msg 3), a timing advance command (TA command), and a temporary RNTI (TC-RNTI). The Type1-PDCCH CSS is configured by the network equipment through a system message and/or a high-layer parameter.

And thirdly, after receiving the RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the RAR. Wherein the upstream resource may be located on an upstream BWP associated with the ssb#1. This step supports HARQ retransmissions. If the network device did not properly receive Msg3, the network device may schedule retransmission of Msg3 using the PDCCH of the TC-RNTI scrambling code. Wherein, DCI format 0_0 may be carried in the PDCCH. The PDCCH of the TC-RNTI scrambling code is transmitted through a Type1-PDCCH CSS on the initial downlink BWP.

Fourth, the network device transmits a message 4 (Msg 4) to the terminal device through the resources in the Type1-PDCCH CSS on the initial downlink BWP, including a contention resolution message, which supports HARQ retransmission. If the terminal device did not properly receive Msg4, the network device may schedule retransmission of Msg4 using the PDCCH of the TC-RNTI scrambling code. Wherein, DCI format 1_0 may be carried in the PDCCH. The PDCCH of the TC-RNTI scrambling code is transmitted through a Type1-PDCCH CSS on the initial downlink BWP. If the terminal equipment correctly receives the Msg4 and determines that the Msg4 is the message of the terminal equipment, the random access process of the terminal equipment is successful, otherwise, the random access process fails. The terminal device needs to initiate a four-step random access procedure (Type-1 random access procedure) again from the first step.

In embodiment 2, the two-step random access procedure (Type-2 random access procedure) may include the steps of:

first, the terminal device sends a message a (MsgA) to the network device on the RO of the corresponding RO #1 and its associated PO on the upstream BWP associated with SSB #1, wherein the MsgA includes an MsgA Preamble and an MsgA PUSCH.

In the second step, after detecting the MsgA, the network device sends a PDCCH scrambled by the MsgB-RNTI to the terminal device through a resource in a Type1-PDCCH Common Search Space (CSS) on the initial downlink BWP, and the PDSCH scheduled by the PDCCH may include a random access response (also referred to as MsgB) corresponding to the MsgA sent by the terminal device. If the network device only detects the MsgA Preamble and does not receive the MsgA PUSCH, the PDSCH scheduled by the PDCCH may include a fallback RAR corresponding to the MsgA Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH using the MsgB-RNTI on the Type1-PDCCH CSS on the initial downlink BWP, and determines whether to include a success RAR (successRAR) or a fallback RAR that the network device transmits to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. If the terminal equipment receives the successful RAR correctly, the terminal equipment feeds back ACK information to the network equipment, wherein the ACK information can be transmitted through uplink BWP (broadband wireless network protocol) associated with the SSB#1, and the random access process of the terminal equipment is successful. Or if the terminal equipment receives the rollback RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the rollback RAR after receiving the rollback RAR, wherein the uplink resource may be located on an uplink BWP associated with the ssb#1, and the two-step random access procedure (Type-2 random access procedure) is rolled back to the four-step random access procedure (Type-1 random access procedure). Or if the terminal device does not receive any RAR, the random access procedure fails, and the terminal device needs to initiate a two-step random access procedure (Type-2 random access procedure) again from the first step.

As embodiment 3, in the first association relationship, at least two SSBs on the initial downlink BWP associate different uplink BWP; in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP. The random access procedure is described as an example.

In embodiment 3, before the terminal device initiates random access, the terminal device performs measurement evaluation on the signal quality of the cell and the signal strength of each SSB in the cell. When the SSB signal detection strength exceeds the threshold, after determining that ssb#1 on the initial downlink BWP is the SSB with the strongest signal, for example, the terminal device determines that the PRACH transmission opportunity corresponding to ssb#1 includes ro#1 on the uplink BWP associated with ssb#1 (for example, the initial uplink BWP associated with ssb#1) according to the mapping relationship between SSB and RO in the first association relationship.

In embodiment 3, the four-step random access procedure (Type-1 random access procedure) may include the steps of:

In the second step, after detecting Msg1, the network device sends the PDCCH scrambled by the RA-RNTI to the terminal device through the resource in the Type1-PDCCH Common Search Space (CSS) on the downlink bwp#2 (in the second association relationship, the downlink BWP associated with ssb#1), where the PDSCH scheduled by the PDCCH may include a random access response (RAR, also referred to as Msg 2) corresponding to the Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH candidates on the Type1-PDCCH CSS on the downlink bwp#2 using the RA-RNTI, and determines whether the network device is included or not to transmit the RAR to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. The RAR may include information such as an uplink grant of message 3 (Msg 3), a timing advance command (TA command), and a temporary RNTI (TC-RNTI). The Type1-PDCCH CSS is configured by the network equipment through a system message and/or a high-layer parameter.

And thirdly, after receiving the RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the RAR. Wherein the upstream resource may be located on an upstream BWP associated with the ssb#1. This step supports HARQ retransmissions. If the network device did not properly receive Msg3, the network device may schedule retransmission of Msg3 using the PDCCH of the TC-RNTI scrambling code. Wherein, DCI format 0_0 may be carried in the PDCCH. The PDCCH of the TC-RNTI scrambling code is transmitted through a Type1-PDCCH CSS on the downlink BWP#2.

In embodiment 3, the two-step random access procedure (Type-2 random access procedure) may include the steps of:

In the second step, after detecting the MsgA, the network device sends the PDCCH scrambled by the MsgB-RNTI to the terminal device through the resource in the Type1-PDCCH Common Search Space (CSS) on the downlink bwp#2, and the PDSCH scheduled by the PDCCH may include a random access response (also referred to as MsgB) corresponding to the MsgA sent by the terminal device. If the network device only detects the MsgA Preamble and does not receive the MsgA PUSCH, the PDSCH scheduled by the PDCCH may include a fallback RAR corresponding to the MsgA Preamble sent by the terminal device. Accordingly, the terminal device detects the PDCCH using the MsgB-RNTI on the Type1-PDCCH CSS on the downlink bwp#2, and determines whether to include a success RAR (successRAR) or a fallback RAR that the network device transmits to itself according to the PDSCH scheduled by the PDCCH after detecting the PDCCH. If the terminal equipment receives the successful RAR correctly, the terminal equipment feeds back ACK information to the network equipment, wherein the ACK information can be transmitted through uplink BWP (broadband wireless network protocol) associated with the SSB#1, and the random access process of the terminal equipment is successful. Or if the terminal equipment receives the rollback RAR, the terminal equipment sends Msg3 on an uplink resource indicated by the rollback RAR after receiving the rollback RAR, wherein the uplink resource may be located on an uplink BWP associated with the ssb#1, and the two-step random access procedure (Type-2 random access procedure) is rolled back to the four-step random access procedure (Type-1 random access procedure). Or if the terminal device does not receive any RAR, the random access procedure fails, and the terminal device needs to initiate a two-step random access procedure (Type-2 random access procedure) again from the first step.

Therefore, in the embodiment of the present application, the terminal device may perform initial access according to the first association relationship and/or the second association relationship, so that it may be avoided that the load on the initial downlink BWP caused by the terminal devices on the multiple terrestrial cells through the same initial downlink BWP access network is too large, thereby avoiding increasing the access delay of the terminal device. In addition, the terminal equipment on a plurality of ground cells can be supported to initiate random access through different initial uplink BWPs, so that the PRACH on the initial uplink BWPs is prevented from being seriously collided.

The terminal-side embodiment of the present application is described in detail above with reference to fig. 5 to 9, and the network-side embodiment of the present application is described in detail below with reference to fig. 10, it being understood that the network-side embodiment corresponds to the terminal-side embodiment, and similar descriptions may refer to the terminal-side embodiment.

Fig. 10 is a schematic flow chart of an initial access method 300 according to an embodiment of the present application, as shown in fig. 10, the method 300 may include at least some of the following:

s310, the network equipment sends first information to the terminal equipment, wherein the first information is used for determining a first association relation and/or a second association relation of initial access of the terminal equipment, the first association relation comprises an association relation of initial downlink BWP and uplink BWP, and the second association relation comprises an association relation of a public search space set and downlink BWP; wherein, in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two SSBs on the initial downlink BWP associate different uplink BWP; in the second association, the set of public search spaces associated with the initial downlink BWP is on the initial downlink BWP, or the set of public search spaces associated with the at least one SSB on the initial downlink BWP is not on the initial downlink BWP.

In some embodiments, the common set of search spaces includes at least one of:

In some embodiments, the first information is transmitted through at least one of a system message, RRC signaling, MAC CE, and DCI.

In some embodiments, the first information includes first configuration information, and the first association is determined based on the first configuration information.

In some embodiments, the first information includes second configuration information, and the second association is determined based on the second configuration information.

In some embodiments, the second configuration information includes PDCCH common configuration information including downlink BWP information corresponding to the PDCCH common configuration and/or SSB index corresponding to the PDCCH common configuration, wherein the PDCCH common configuration includes a configuration of the common search space set.

In some embodiments, in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and the network device may perform at least one of the following:

in the Type-1 random access procedure, the network device detects a first PRACH corresponding to a message 1 (Msg 1) through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downlink BWP;

in the Type-2 random access procedure, the network device passes through a first PRACH corresponding to a first RO detection message a (MsgA) on the initial uplink BWP, and passes through a first PUSCH corresponding to a first PO detection message a (MsgA) on the initial uplink BWP, wherein the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB sent by the network device on the initial downlink BWP;

in the Type-2 random access procedure, the network device detects a first PRACH corresponding to a first RO (MsgA) on the initial upstream BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downstream BWP.

In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB sent by the network device on the initial downstream BWP; the network device may perform at least one of the following:

In the Type-1 random access process, the network device detects a first PRACH corresponding to a message 1 (Msg 1) through a first RO on the first uplink BWP;

in the Type-2 random access procedure, the network device detects a first PRACH corresponding to the message a through a first RO on the first uplink BWP, and detects a first PUSCH corresponding to the message a (MsgA) through a first PO on the first uplink BWP, where the first PO is associated with the first RO;

in the Type-2 random access procedure, the network device detects a first PRACH corresponding to a first RO detection message a (MsgA) on the first uplink BWP.

in the random access process of Type-1, the network device receives a first PUSCH corresponding to message 3 (Msg 3) through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by the network device through uplink grant information in an RAR corresponding to message 2 (Msg 2);

In the Type-2 random access process, the network device receives a first PUCCH corresponding to a message B (MsgB) through a first physical uplink control channel PUCCH resource on the first uplink BWP, where the first PUCCH resource is indicated by the network device through an RAR corresponding to the message B (MsgB);

in the Type-2 random access process, the network device receives a first PUSCH corresponding to a message B (MsgB) through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by the network device through uplink grant information in a backoff RAR corresponding to the message B (MsgB).

In some embodiments, in the second association, the initial downlink BWP associated common search space is set on the initial downlink BWP, and the network device may perform at least one of the following:

the common search space set comprises a Type0-PDCCH CSS set, and the network equipment sends a PDCCH scrambled by the SI-RNTI through resources in the Type0-PDCCH CSS set on the initial downlink BWP;

the common search space set comprises a Type0A-PDCCH CSS set, and the network equipment sends the PDCCH scrambled by the SI-RNTI through resources in the Type0A-PDCCH CSS set on the initial downlink BWP;

The common search space set comprises a Type1-PDCCH CSS set, and the network equipment transmits RA-RNTI, msgB-RNTI or TC-RNTI scrambled PDCCH through resources in the Type1-PDCCH CSS set on the initial downlink BWP;

the common search space set includes a Type2-PDCCH CSS set, and the network device transmits a P-RNTI scrambled PDCCH through resources in the Type2-PDCCH CSS set on the initial downlink BWP.

In some embodiments, in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: a first SSB-associated common search space on the initial downstream BWP is aggregated at a first downstream BWP, the first downstream BWP and the initial downstream BWP being different downstream BWP, wherein the first SSB is an SSB transmitted by the network device on the initial downstream BWP; the network device may perform at least one of the following:

the common search space set comprises a Type0-PDCCH CSS set, and the network equipment sends a PDCCH scrambled by the SI-RNTI through resources in the Type0-PDCCH CSS set on the first downlink BWP;

the common search space set comprises a Type0A-PDCCH CSS set, and the network equipment sends the PDCCH scrambled by the SI-RNTI through resources in the Type0A-PDCCH CSS set on the first downlink BWP;

The common search space set comprises a Type1-PDCCH CSS set, and the network equipment transmits RA-RNTI, msgB-RNTI or TC-RNTI scrambled PDCCH through resources in the Type1-PDCCH CSS set on the first downlink BWP;

the common search space set includes a Type2-PDCCH CSS set, and the network device transmits a P-RNTI scrambled PDCCH through resources in the Type2-PDCCH CSS set on the first downlink BWP.

Therefore, in the embodiment of the present application, the network device may indicate the first association relationship and/or the second association relationship to the terminal device, and the terminal device may perform initial access according to the first association relationship and/or the second association relationship, so that the load on the initial downlink BWP caused by the terminal devices on the multiple terrestrial cells through the same initial downlink BWP access network may be avoided from being too large, thereby avoiding increasing the access delay of the terminal device. In addition, the terminal equipment on a plurality of ground cells can be supported to initiate random access through different initial uplink BWPs, so that the PRACH on the initial uplink BWPs is prevented from being seriously collided.

The method embodiments of the present application are described in detail above with reference to fig. 5 to 10, and the apparatus embodiments of the present application are described in detail below with reference to fig. 11 to 15, it being understood that the apparatus embodiments and the method embodiments correspond to each other, and similar descriptions may refer to the method embodiments.

Fig. 11 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in fig. 11, the terminal apparatus 400 includes:

a processing unit 410, configured to perform initial access according to a first association relationship and/or a second association relationship, where the first association relationship includes an association relationship between an initial downlink bandwidth portion BWP and an uplink BWP, and the second association relationship includes an association relationship between a public search space set and the downlink BWP; wherein,

in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two synchronization signal blocks SSBs on the initial downlink BWP associate different uplink BWP;

the SSB-associated random access transmission opportunity RO on the initial downstream BWP is on the initial upstream BWP; and/or the number of the groups of groups,

the SSB-associated RO and physical uplink shared channel transmission opportunity PO on the initial downstream BWP are on the initial upstream BWP.

In some embodiments, the common set of search spaces includes at least one of:

type0 physical downlink control channel common search space Type0-PDCCH CSS set, type0A-PDCCH CSS set, type1-PDCCH CSS set, type2-PDCCH CSS set.

In some embodiments, the first association is predefined, or the first association is determined based on first configuration information sent by the network device, where the first configuration information is transmitted through at least one of a system message, radio resource control RRC signaling, a medium access control element MAC CE, and downlink control information DCI.

In some embodiments, in the first association, the initial downstream BWP is associated with an initial upstream BWP,

the processing unit 410 is specifically configured to:

in the Type-1 random access process, a first physical random access channel PRACH corresponding to a message 1 is sent through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP; or,

in the random access process of Type-2, a first PRACH corresponding to a message a is sent through a first RO on the initial uplink BWP, and a first PUSCH corresponding to the message a is sent through a first PO on the initial uplink BWP, wherein the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP; or,

and in the Type-2 random access process, sending a first PRACH corresponding to the message A through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal equipment on the initial downlink BWP.

In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downstream BWP;

The processing unit 410 is specifically configured to:

in the random access process of the Type-1, a first physical random access channel PRACH corresponding to the message 1 is sent through a first RO on the first uplink BWP; or,

in the random access process of Type-2, a first PRACH corresponding to a message A is sent through a first RO on the first uplink BWP, and a first PUSCH corresponding to the message A is sent through a first PO on the first uplink BWP, wherein the first PO is associated with the first RO; or,

and in the Type-2 random access process, sending a first PRACH corresponding to the message A through a first RO on the first uplink BWP.

the processing unit 410 is specifically configured to:

in the random access process of the Type-1, a first PUSCH corresponding to the message 3 is sent through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by uplink authorization information in a random access response RAR corresponding to the message 2; or,

In the random access process of the Type-2, a first PUCCH corresponding to a message B is sent through a first Physical Uplink Control Channel (PUCCH) resource on the first uplink BWP, wherein the first PUCCH comprises response information corresponding to the message B; or,

and in the random access process of the Type-2, sending a first PUSCH corresponding to the message B through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by uplink authorization information in a back-off RAR corresponding to the message B.

In some embodiments, in the second association, the common search space associated with the initial downstream BWP is collected on the initial downstream BWP,

the processing unit 410 performs initial access according to the first association relationship and/or the second association relationship, including at least one of the following cases:

the common search space set includes a Type0-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type0-PDCCH CSS set on the initial downlink BWP using a system message-radio network temporary identity SI-RNTI;

the common search space set includes a Type0A-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type0A-PDCCH CSS set on the initial downlink BWP using SI-RNTI;

The common search space set includes a Type1-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type1-PDCCH CSS set on the initial downlink BWP using a random access-radio network temporary identity RA-RNTI, a message B-radio network temporary identity MsgB-RNTI, or a temporary cell-radio network temporary identity TC-RNTI;

the common search space set includes a Type2-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type2-PDCCH CSS set on the initial downlink BWP using a paging-radio network temporary identity P-RNTI.

In some embodiments, in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: the first SSB-associated common search space on the initial downlink BWP is collected at a first downlink BWP, the first downlink BWP and the initial downlink BWP being different downlink BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downlink BWP;

the common search space set includes a Type0-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type0-PDCCH CSS set on the first downlink BWP using SI-RNTI;

The common search space set includes a Type0A-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type0A-PDCCH CSS set on the first downlink BWP using SI-RNTI;

the common search space set includes a Type1-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type1-PDCCH CSS set on the first downlink BWP using RA-RNTI, msgB-RNTI, or TC-RNTI;

the common search space set includes a Type2-PDCCH CSS set, and the processing unit 410 detects PDCCH candidates in the Type2-PDCCH CSS set on the first downlink BWP using a P-RNTI.

In some embodiments, the processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 400 are respectively for implementing the corresponding flow of the terminal device in the method 200 shown in fig. 5, which is not described herein for brevity.

Fig. 12 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. As shown in fig. 12, the network device 500 includes:

a communication unit 510, configured to send first information to a terminal device, where the first information is used to determine a first association relationship and/or a second association relationship of initial access by the terminal device, where the first association relationship includes an association relationship between an initial downlink bandwidth portion BWP and an uplink BWP, and the second association relationship includes an association relationship between a public search space set and the downlink BWP; wherein,

In some embodiments, the common set of search spaces includes at least one of:

In some embodiments, the first information is transmitted through at least one of a system message, radio resource control, RRC, signaling, a medium access control element, MAC CE, and downlink control information, DCI.

the network device further comprises a processing unit 520, wherein the processing unit 520 is configured to perform at least one of the following:

in the Type-1 random access procedure, the processing unit 520 detects a first physical random access channel PRACH corresponding to the message 1 through a first RO on the initial uplink BWP, where the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downlink BWP; or,

in the Type-2 random access procedure, the processing unit 520 detects a first PRACH corresponding to the message a through a first RO on the initial uplink BWP, and detects a first PUSCH corresponding to the message a through a first PO on the initial uplink BWP, where the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB sent by the network device on the initial downlink BWP; or,

In the Type-2 random access procedure, the processing unit 520 detects a first PRACH corresponding to the message a through a first RO on the initial uplink BWP, where the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downlink BWP.

In some embodiments, in the first association, at least two SSBs on the initial downlink BWP associate different uplink BWP, including: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB sent by the network device on the initial downstream BWP;

in the Type-1 random access procedure, the processing unit 520 detects a first physical random access channel PRACH corresponding to the message 1 through a first RO on the first uplink BWP;

in the Type-2 random access procedure, the processing unit 520 detects a first PRACH corresponding to the message a through a first RO on the first uplink BWP, and detects a first PUSCH corresponding to the message a through a first PO on the first uplink BWP, where the first PO is associated with the first RO;

in the Type-2 random access procedure, the processing unit 520 detects a first PRACH corresponding to the message a through a first RO on the first uplink BWP.

in the Type-1 random access process, the processing unit 520 receives a first PUSCH corresponding to the message 3 through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by the network device through uplink grant information in a random access response RAR corresponding to the message 2;

in the Type-2 random access procedure, the processing unit 520 receives a first PUCCH corresponding to the message B through a first physical uplink control channel PUCCH resource on the first uplink BWP, where the first PUCCH resource is indicated by the network device through an RAR corresponding to the message B;

in the Type-2 random access procedure, the processing unit 520 receives a first PUSCH corresponding to the message B through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by the network device through uplink grant information in a backoff RAR corresponding to the message B.

the common search space set includes a Type0-PDCCH CSS set, and the processing unit 520 sends a system message, a radio network temporary identifier SI-RNTI, scrambled PDCCH through a resource in the Type0-PDCCH CSS set on the initial downlink BWP;

the common search space set includes a Type0A-PDCCH CSS set, and the processing unit 520 sends a SI-RNTI scrambled PDCCH through a resource in the Type0A-PDCCH CSS set on the initial downlink BWP;

the common search space set includes a Type1-PDCCH CSS set, and the processing unit 520 sends a random access-radio network temporary identity RA-RNTI, a message B-radio network temporary identity MsgB-RNTI, or a PDCCH scrambled by a temporary cell-radio network temporary identity TC-RNTI through resources in the Type1-PDCCH CSS set on the initial downlink BWP;

the common search space set includes a Type2-PDCCH CSS set, and the processing unit 520 transmits a paging-radio network temporary identity P-RNTI scrambled PDCCH through a resource in the Type2-PDCCH CSS set on the initial downlink BWP.

In some embodiments, in the second association, the common search space set associated with the at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: a first SSB-associated common search space on the initial downstream BWP is aggregated at a first downstream BWP, the first downstream BWP and the initial downstream BWP being different downstream BWP, wherein the first SSB is an SSB transmitted by the network device on the initial downstream BWP;

the common search space set includes a Type0-PDCCH CSS set, and the processing unit 520 sends a SI-RNTI scrambled PDCCH through a resource in the Type0-PDCCH CSS set on the first downlink BWP;

the common search space set includes a Type0A-PDCCH CSS set, and the processing unit 520 sends a SI-RNTI scrambled PDCCH through a resource in the Type0A-PDCCH CSS set on the first downlink BWP;

the common search space set includes a Type1-PDCCH CSS set, and the processing unit 520 sends RA-RNTI, msgB-RNTI, or TC-RNTI scrambled PDCCHs through resources in the Type1-PDCCH CSS set on the first downlink BWP;

The common search space set includes a Type2-PDCCH CSS set, and the processing unit 520 transmits a P-RNTI scrambled PDCCH through resources in the Type2-PDCCH CSS set on the first downlink BWP.

In some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the network device 500 are respectively for implementing the corresponding flow of the network device in the method 300 shown in fig. 10, and are not further described herein for brevity.

Fig. 13 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device 600 shown in fig. 13 comprises a processor 610, from which the processor 610 may call and run a computer program to implement the method in the embodiments of the present application.

In some embodiments, as shown in fig. 13, the communication device 600 may also include a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

In some embodiments, as shown in fig. 13, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may transmit information or data to other devices, or receive information or data transmitted by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

In some embodiments, the communication device 600 may be specifically a network device in the embodiments of the present application, and the communication device 600 may implement corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the communication device 600 may be specifically a terminal device in the embodiments of the present application, and the communication device 600 may implement corresponding flows implemented by the terminal device in each method in the embodiments of the present application, which are not described herein for brevity.

Fig. 14 is a schematic structural view of an apparatus of an embodiment of the present application. The apparatus 700 shown in fig. 14 includes a processor 710, and the processor 710 may call and execute a computer program from a memory to implement the methods in the embodiments of the present application.

In some embodiments, as shown in fig. 14, the apparatus 700 may further include a memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

In some embodiments, the apparatus 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

In some embodiments, the apparatus 700 may further comprise an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

In some embodiments, the apparatus may be applied to a network device in the embodiments of the present application, and the apparatus may implement corresponding flows implemented by the network device in each method in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the apparatus may be applied to a terminal device in the embodiments of the present application, and the apparatus may implement a corresponding flow implemented by the terminal device in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the device mentioned in the embodiments of the present application may also be a chip. For example, a system-on-chip or a system-on-chip, etc.

Fig. 15 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. As shown in fig. 15, the communication system 800 includes a terminal device 810 and a network device 820.

The terminal device 810 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 820 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

In some embodiments, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer readable storage medium may be applied to a terminal device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

In some embodiments, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer program product may be applied to a terminal device in an embodiment of the present application, and the computer program instructions cause the computer to execute corresponding processes implemented by the terminal device in each method in the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

In some embodiments, the computer program may be applied to a network device in the embodiments of the present application, where the computer program when executed on a computer causes the computer to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, and for brevity, will not be described in detail herein.

In some embodiments, the computer program may be applied to a terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. For such understanding, the technical solutions of the present application may be embodied in essence or in a part contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An initial access method, comprising:

the terminal equipment performs initial access according to a first association relationship and/or a second association relationship, wherein the first association relationship comprises an association relationship between an initial downlink bandwidth part BWP and an uplink BWP, and the second association relationship comprises an association relationship between a public search space set and the downlink BWP; wherein,

in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two synchronization signal blocks SSBs on the initial downlink BWP associate different uplink BWP;

in the second association, the common search space set associated with the initial downlink BWP is on the initial downlink BWP, or the common search space set associated with at least one SSB on the initial downlink BWP is not on the initial downlink BWP.
The method of claim 1, wherein in the first association, the initial downstream BWP is associated with an initial upstream BWP, wherein,

the SSB-associated random access transmission opportunity RO on the initial downlink BWP is on the initial uplink BWP; and/or the number of the groups of groups,

the SSB-associated RO and physical uplink shared channel transmission opportunity PO on the initial downlink BWP are on the initial uplink BWP.
The method of claim 1, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWPs, comprising:

a first SSB on the initial downstream BWP associates a first upstream BWP, wherein the first SSB-associated RO is on the first upstream BWP and/or the first SSB-associated RO and PO are on the first upstream BWP;

a second SSB on the initial downstream BWP associates a second upstream BWP, wherein the second SSB-associated RO is on the second upstream BWP and/or the second SSB-associated RO and PO are on the second upstream BWP.
The method of claim 1, wherein in the second association, the set of common search spaces associated with at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising:

A first SSB on the initial downstream BWP is associated with a first downstream BWP, wherein the first SSB-associated common search space is aggregated on the first downstream BWP, which is a different downstream BWP than the initial downstream BWP.
The method of any of claims 1 to 4, wherein the common set of search spaces comprises at least one of:

type0 physical downlink control channel common search space Type0-PDCCH CSS set, type0A-PDCCH CSS set, type1-PDCCH CSS set, type2-PDCCH CSS set.
The method according to any of claims 1 to 5, wherein the first association is predefined or determined based on first configuration information sent by a network device, wherein the first configuration information is transmitted by at least one of a system message, radio resource control, RRC, signaling, a medium access control, control element, MAC CE, and downlink control information, DCI.
The method of claim 6, wherein the first configuration information comprises random access configuration information, wherein the random access configuration information comprises uplink BWP information associated with the random access configuration, and/or SSB index associated with the random access configuration.
The method of any one of claims 1 to 7, wherein the second association is predefined or determined based on second configuration information sent by a network device, wherein the second configuration information is transmitted through at least one of a system message, RRC signaling, MAC CE, and DCI.
The method of claim 8, wherein the second configuration information comprises PDCCH common configuration information comprising downlink BWP information corresponding to the PDCCH common configuration and/or SSB index corresponding to the PDCCH common configuration, wherein the PDCCH common configuration comprises a configuration of the common set of search spaces.
The method according to any one of claims 1 to 9, wherein in the first association, the initial downstream BWP is associated with an initial upstream BWP,

the terminal equipment performs initial access according to the first association relation and/or the second association relation, and comprises:

in a Type-1 random access process, the terminal equipment sends a first physical random access channel PRACH corresponding to a message 1 through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal equipment on the initial downlink BWP; or,

In the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to a message a through a first RO on the initial uplink BWP, and sends a first PUSCH corresponding to the message a through a first PO on the initial uplink BWP, wherein the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP; or,

in the Type-2 random access procedure, the terminal device sends a first PRACH corresponding to a message a through a first RO on the initial uplink BWP, where the first RO is associated with a first SSB, and the first SSB is an SSB detected by the terminal device on the initial downlink BWP.
The method according to any one of claims 1 to 9, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWP, comprising: a first SSB on the initial downlink BWP is associated with a first uplink BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downlink BWP;

the terminal equipment performs initial access according to the first association relation and/or the second association relation, and comprises:

In the Type-1 random access process, the terminal equipment sends a first physical random access channel PRACH corresponding to a message 1 through a first RO on the first uplink BWP; or,

in the Type-2 random access process, the terminal device sends a first PRACH corresponding to a message a through a first RO on the first uplink BWP, and sends a first PUSCH corresponding to the message a through a first PO on the first uplink BWP, wherein the first PO is associated with the first RO; or,

in the Type-2 random access process, the terminal device sends a first PRACH corresponding to the message a through a first RO on the first uplink BWP.
The method according to any one of claims 1 to 11, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWP, comprising: a first SSB on the initial downlink BWP is associated with a first uplink BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downlink BWP;

the terminal equipment performs initial access according to the first association relation and/or the second association relation, and comprises:

in the random access process of Type-1, the terminal equipment sends a first PUSCH corresponding to a message 3 through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by uplink authorization information in a random access response RAR corresponding to the message 2; or,

In the Type-2 random access process, the terminal device sends a first PUCCH corresponding to a message B through a first Physical Uplink Control Channel (PUCCH) resource on the first uplink BWP, wherein the first PUCCH comprises response information corresponding to the message B; or,

in the Type-2 random access process, the terminal device sends a first PUSCH corresponding to a message B through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by uplink grant information in a fallback RAR corresponding to the message B.
The method according to any one of claims 1 to 12, wherein in the second association, the set of common search spaces associated with the initial downstream BWP is on the initial downstream BWP,

the terminal equipment performs initial access according to the first association relation and/or the second association relation, and the initial access comprises at least one of the following conditions:

the public search space set comprises a Type0-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0-PDCCH CSS set on the initial downlink BWP by using a system message-radio network temporary identifier SI-RNTI;

the public search space set comprises a Type0A-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0A-PDCCH CSS set on the initial downlink BWP by using SI-RNTI;

The public search space set comprises a Type1-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type1-PDCCH CSS set on the initial downlink BWP by using a random access-radio network temporary identifier RA-RNTI, a message B-radio network temporary identifier MsgB-RNTI or a temporary cell-radio network temporary identifier TC-RNTI;

the common search space set comprises a Type2-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type2-PDCCH CSS set on the initial downlink BWP by using a paging-radio network temporary identifier (P-RNTI).
The method according to any one of claims 1 to 12, wherein in the second association, the set of common search spaces associated with at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: a first SSB-associated common search space on the initial downlink BWP is collected at a first downlink BWP, which is a different downlink BWP than the initial downlink BWP, wherein the first SSB is an SSB detected by the terminal device on the initial downlink BWP;

the terminal equipment performs initial access according to the first association relation and/or the second association relation, and the initial access comprises at least one of the following conditions:

The common search space set comprises a Type0-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0-PDCCH CSS set on the first downlink BWP by using SI-RNTI;

the common search space set comprises a Type0A-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type0A-PDCCH CSS set on the first downlink BWP by using SI-RNTI;

the common search space set comprises a Type1-PDCCH CSS set, and the terminal equipment detects PDCCH candidates in the Type1-PDCCH CSS set on the first downlink BWP by using RA-RNTI, msgB-RNTI or TC-RNTI;

the common search space set includes a Type2-PDCCH CSS set, and the terminal device detects PDCCH candidates in the Type2-PDCCH CSS set on the first downlink BWP using a P-RNTI.
An initial access method, comprising:

the network equipment sends first information to the terminal equipment, wherein the first information is used for determining a first association relation and/or a second association relation of initial access of the terminal equipment, the first association relation comprises an association relation between an initial downlink bandwidth part BWP and an uplink BWP, and the second association relation comprises an association relation between a public search space set and the downlink BWP; wherein,

In the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two synchronization signal blocks SSBs on the initial downlink BWP associate different uplink BWP;

in the second association, the common search space set associated with the initial downlink BWP is on the initial downlink BWP, or the common search space set associated with at least one SSB on the initial downlink BWP is not on the initial downlink BWP.
The method of claim 15, wherein in the first association, the initial downstream BWP is associated with an initial upstream BWP, wherein,

the SSB-associated random access transmission opportunity RO on the initial downlink BWP is on the initial uplink BWP; and/or the number of the groups of groups,

the SSB-associated RO and physical uplink shared channel transmission opportunity PO on the initial downlink BWP are on the initial uplink BWP.
The method of claim 15, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWPs, comprising:

a first SSB on the initial downstream BWP associates a first upstream BWP, wherein the first SSB-associated RO is on the first upstream BWP and/or the first SSB-associated RO and PO are on the first upstream BWP;

A second SSB on the initial downstream BWP associates a second upstream BWP, wherein the second SSB-associated RO is on the second upstream BWP and/or the second SSB-associated RO and PO are on the second upstream BWP.
The method of claim 15, wherein in the second association, the set of common search spaces associated with at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising:

a first SSB on the initial downstream BWP is associated with a first downstream BWP, wherein the first SSB-associated common search space is aggregated on the first downstream BWP, which is a different downstream BWP than the initial downstream BWP.
The method of any of claims 15 to 18, wherein the common set of search spaces comprises at least one of:

type0 physical downlink control channel common search space Type0-PDCCH CSS set, type0A-PDCCH CSS set, type1-PDCCH CSS set, type2-PDCCH CSS set.
The method according to any of claims 15 to 19, wherein the first information is transmitted by at least one of a system message, radio resource control, RRC, signaling, medium access control, control element, MAC CE, and downlink control information, DCI.
The method according to any one of claim 15 to 20, wherein,

the first information includes first configuration information, and the first association relation is determined based on the first configuration information.
The method of claim 21, wherein the first configuration information comprises random access configuration information, wherein the random access configuration information comprises uplink BWP information associated with the random access configuration, and/or SSB index associated with the random access configuration.
The method of any one of claims 15 to 22, wherein the first information comprises second configuration information, the second association being determined based on the second configuration information.
The method of claim 23, wherein the second configuration information comprises PDCCH common configuration information comprising downlink BWP information corresponding to the PDCCH common configuration and/or SSB index corresponding to the PDCCH common configuration, wherein the PDCCH common configuration comprises a configuration of the common set of search spaces.
The method according to any one of claims 15 to 24, wherein in the first association, the initial downstream BWP is associated with an initial upstream BWP,

The method further comprises at least one of:

in a Type-1 random access process, the network device detects a first physical random access channel PRACH corresponding to a message 1 through a first RO on the initial uplink BWP, wherein the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downlink BWP;

in the Type-2 random access procedure, the network device detects a first PUSCH corresponding to the message a through a first RO on the initial uplink BWP through a first PRACH corresponding to the message a through a first PO on the initial uplink BWP, wherein the first RO is associated with a first SSB, the first PO is associated with the first RO, and the first SSB is an SSB sent by the network device on the initial downlink BWP;

in the Type-2 random access procedure, the network device detects a first PRACH corresponding to a message a through a first RO on the initial uplink BWP, where the first RO is associated with a first SSB, and the first SSB is an SSB sent by the network device on the initial downlink BWP.
The method according to any one of claims 15 to 24, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWP, comprising: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB sent by the network device on the initial downstream BWP;

The method further comprises at least one of:

in the Type-1 random access process, the network device passes through a first physical random access channel PRACH corresponding to a first RO detection message 1 on the first uplink BWP;

in the Type-2 random access process, the network device detects a first PRACH corresponding to the message a through a first RO on the first uplink BWP, and detects a first PUSCH corresponding to the message a through a first PO on the first uplink BWP, wherein the first PO is associated with the first RO;

in the Type-2 random access process, the network device detects a first PRACH corresponding to the message a through a first RO on the first uplink BWP.
The method according to any one of claims 15 to 26, wherein in the first association, at least two SSBs on the initial downstream BWP associate different upstream BWP, comprising: a first SSB on the initial downstream BWP is associated with a first upstream BWP, wherein the first SSB is an SSB sent by the network device on the initial downstream BWP;

the method further comprises at least one of:

in the random access process of Type-1, the network device receives a first PUSCH corresponding to a message 3 through a first PUSCH resource on the first uplink BWP, wherein the first PUSCH resource is indicated by uplink grant information in a random access response RAR corresponding to the message 2 by the network device; or,

In the Type-2 random access process, the network device receives a first PUCCH corresponding to a message B through a first physical uplink control channel PUCCH resource on the first uplink BWP, wherein the first PUCCH resource is indicated by the network device through an RAR corresponding to the message B; or,

in the Type-2 random access process, the network device receives a first PUSCH corresponding to a message B through a first PUSCH resource on the first uplink BWP, where the first PUSCH resource is indicated by the network device through uplink grant information in a fallback RAR corresponding to the message B.
The method according to any one of claims 15 to 27, wherein in the second association, the set of common search spaces associated with the initial downstream BWP is on the initial downstream BWP,

the method further comprises at least one of:

the public search space set comprises a Type0-PDCCH CSS set, and the network equipment sends a system message-a PDCCH scrambled by a radio network temporary identifier SI-RNTI through resources in the Type0-PDCCH CSS set on the initial downlink BWP;

the public search space set comprises a Type0A-PDCCH CSS set, and the network equipment sends a PDCCH scrambled by an SI-RNTI through resources in the Type0A-PDCCH CSS set on the initial downlink BWP;

The public search space set comprises a Type1-PDCCH CSS set, and the network equipment sends a random access-radio network temporary identifier RA-RNTI, a message B-radio network temporary identifier MsgB-RNTI or a PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI through resources in the Type1-PDCCH CSS set on the initial downlink BWP;

the common search space set comprises a Type2-PDCCH CSS set, and the network equipment sends the PDCCH scrambled by the paging-radio network temporary identifier P-RNTI through resources in the Type2-PDCCH CSS set on the initial downlink BWP.
The method of any of claims 15 to 27, wherein in the second association, the set of common search spaces associated with at least one SSB on the initial downstream BWP is not on the initial downstream BWP, comprising: a first SSB-associated common search space on the initial downstream BWP is aggregated at a first downstream BWP, the first downstream BWP and the initial downstream BWP being different downstream BWP, wherein the first SSB is an SSB sent by the network device on the initial downstream BWP;

the method further comprises at least one of:

The public search space set comprises a Type0-PDCCH CSS set, and the network equipment sends a PDCCH scrambled by an SI-RNTI through resources in the Type0-PDCCH CSS set on the first downlink BWP;

the public search space set comprises a Type0A-PDCCH CSS set, and the network equipment sends a SI-RNTI scrambled PDCCH through resources in the Type0A-PDCCH CSS set on the first downlink BWP;

the public search space set comprises a Type1-PDCCH CSS set, and the network equipment sends RA-RNTI, msgB-RNTI or TC-RNTI scrambled PDCCH through resources in the Type1-PDCCH CSS set on the first downlink BWP;

the common search space set includes a Type2-PDCCH CSS set, and the network device transmits a P-RNTI scrambled PDCCH through resources in the Type2-PDCCH CSS set on the first downlink BWP.
A terminal device, comprising:

the processing unit is used for carrying out initial access according to a first incidence relation and/or a second incidence relation, wherein the first incidence relation comprises an incidence relation between an initial downlink bandwidth part BWP and an uplink BWP, and the second incidence relation comprises an incidence relation between a public search space set and the downlink BWP; wherein,

In the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two synchronization signal blocks SSBs on the initial downlink BWP associate different uplink BWP;

in the second association, the common search space set associated with the initial downlink BWP is on the initial downlink BWP, or the common search space set associated with at least one SSB on the initial downlink BWP is not on the initial downlink BWP.
A network device, comprising:

a communication unit, configured to send first information to a terminal device, where the first information is used to determine a first association relationship and/or a second association relationship of initial access by the terminal device, where the first association relationship includes an association relationship between an initial downlink bandwidth portion BWP and an uplink BWP, and the second association relationship includes an association relationship between a public search space set and the downlink BWP; wherein,

in the first association relationship, the initial downlink BWP associates an initial uplink BWP, and/or at least two synchronization signal blocks SSBs on the initial downlink BWP associate different uplink BWP;

in the second association, the common search space set associated with the initial downlink BWP is on the initial downlink BWP, or the common search space set associated with at least one SSB on the initial downlink BWP is not on the initial downlink BWP.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 1 to 14.
A network device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 15 to 29.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 14.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 15 to 29.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 14.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 15 to 29.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 14.
A computer program product comprising computer program instructions which cause a computer to perform the method of any of claims 15 to 29.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 14.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 15 to 29.