Access capability indication method and apparatus, terminal and network device

Abstract

The application discloses an access capability indication method and device, a terminal and a network device; the method comprises the following steps: a terminal acquires a first physical random access channel opportunity RO; the terminal indicates that the terminal has the capability of supporting the access of a cell with non-continuous frequency domain resources according to the first RO or a first random access preamble carried by the first RO in a random access process; and a network device acquires the first RO or the first random access preamble carried by the first RO in a random access process, and the first RO or the first random access preamble is used for indicating that the terminal has the capability of supporting the cell with non-continuous frequency domain resources, so that the RO or the random access preamble in the random access process is used for indicating the access capability (of the cell with non-continuous frequency domain resources) of the terminal to the network device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to an access capability indication method and device, a terminal and a network device. BACKGROUND

[0002] The standard protocol formulated by the 3rd generation partnership project (3GPP) has made relevant research on the configuration of the frequency domain resources of a cell. Among them, the frequency domain resources of the cell configured by the network are all continuous resource blocks (RBs).

[0003] With the continuous evolution of the standard protocol formulated by the 3GPP and the continuous complexity of the communication scene, the frequency domain resources in the cell can exist in a non-continuous manner. Due to the possible difference in access capability between different terminals, some terminals can support accessing the cell with non-continuous frequency domain resources, while other terminals can not support accessing the cell with non-continuous frequency domain resources. When terminals supporting non-continuous frequency domain resources and terminals not supporting non-continuous frequency domain resources both need to access the cell, how the network device can identify whether the terminal supports or does not support needs to be further researched. SUMMARY

[0004] The present application provides an access capability indication method and device, a terminal and a network device, in order to realize the indication of the access capability (of the cell with non-continuous frequency domain resources) of the terminal to the network device through the RO or the random access preamble in the random access process.

[0005] In a first aspect, the present application provides an access capability indication method, comprising:

[0006] The terminal acquires a first physical random access channel opportunity RO;

[0007] The terminal indicates, in a random access process, that the terminal has the capability to support accessing the cell with non-continuous frequency domain resources according to the first RO or a first random access preamble carried by the first RO.

[0008] It can be seen that, in order to realize the indication of whether the terminal has the capability of supporting the cell of non-continuous frequency domain resource (i.e. access capability), the terminal can acquire the first RO and indicate that it has the capability of supporting the cell of non-continuous frequency domain resource (or indicate that it supports the cell of non-continuous frequency domain resource) according to the first RO or the first random access preamble carried by the first RO in the random access process, so as to realize the indication of the access capability (of the cell of non-continuous frequency domain resource) of the terminal to the network device through the RO or the random access preamble in the random access process.

[0009] In a second aspect, an access capability indication method is provided, comprising:

[0010] The network device acquires the first physical random access channel opportunity RO or the first random access preamble carried by the first RO in the random access process, and the first RO or the first random access preamble is used to indicate that the terminal has the capability of supporting the cell of non-continuous frequency domain resource.

[0011] It can be seen that, in order to ensure that the network device can learn the access capability (of the cell of non-continuous frequency domain resource) of the terminal, the network device can acquire the first RO or the first random access preamble carried by the first RO in the random access process, so as to realize the possibility of learning the access capability (of the cell of non-continuous frequency domain resource) of the terminal through the indication of the RO or the indication of the random access preamble in the random access process.

[0012] In a third aspect, an access capability indication apparatus is provided, comprising a processing unit and a communication unit, and the processing unit is configured to:

[0013] Acquire the first physical random access channel opportunity RO through the communication unit;

[0014] Indicate that the apparatus has the capability of supporting the cell of non-continuous frequency domain resource according to the first RO or the first random access preamble carried by the first RO in the random access process.

[0015] In a fourth aspect, an access capability indication apparatus is provided, comprising a processing unit and a communication unit, and the processing unit is configured to:

[0016] Acquire the first physical random access channel opportunity RO or the first random access preamble carried by the first RO through the communication unit in the random access process, and the first RO or the first random access preamble is used to indicate that the terminal has the capability of supporting the cell of non-continuous frequency domain resource.

[0017] In a fifth aspect, a terminal of the present application includes a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the first aspect.

[0018] In a sixth aspect, a network device of the present application includes a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the second aspect.

[0019] In a seventh aspect, a computer readable storage medium of the present application stores a computer program or instructions, which, when executed by a processor, implement the steps described in the first aspect or the second aspect.

[0020] In an eighth aspect, a computer program product of the present application includes a computer program or instructions, which, when executed by a processor, implement the steps described in the first aspect or the second aspect. Exemplarily, the computer program product can be a software installation package. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced.

[0022] Figure 1 is a schematic diagram of an architecture of a wireless communication system according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a procedure of a 4-step contention-based random access according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of a procedure of a 2-step contention-based random access according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of a procedure of an access capability indication method according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a structure of non-contiguous frequency domain resources in a cell according to an embodiment of the present application;

[0027] Figure 6 is a schematic diagram of another structure of non-contiguous frequency domain resources in a cell according to an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of still another structure of non-contiguous frequency domain resources in a cell according to an embodiment of the present application;

[0029] Figure 8 is a structural diagram of the arrangement order between various RA preamble sequences according to an embodiment of the present application;

[0030] Figure 9 is a structural diagram of the arrangement order between CBRA preamble sequences of 4-step type random access and CBRA preamble sequences of 2-step type random access according to an embodiment of the present application;

[0031] Figure 10 is a structural diagram of the arrangement order between the sequence to which the first random access preamble belongs and the sequence to which the second random access preamble belongs according to an embodiment of the present application;

[0032] Figure 11 is a structural diagram of the arrangement order between the sequence to which the first random access preamble belongs and the sequence to which the third random access preamble belongs according to an embodiment of the present application;

[0033] Figures 12 to 15 is a structural diagram of the arrangement order between the sequence to which the first random access preamble belongs, the sequence to which the second random access preamble belongs and the sequence to which the third random access preamble belongs according to an embodiment of the present application;

[0034] Figures 16 to 21 is a structural diagram of the arrangement order between various RA preamble sequences in CBRA preamble sequences according to an embodiment of the present application;

[0035] Figure 22 is a functional unit component block diagram of an access capability indication device according to an embodiment of the present application;

[0036] Figure 23 is a functional unit component block diagram of another access capability indication device according to an embodiment of the present application;

[0037] Figure 24 is a structural diagram of a terminal according to an embodiment of the present application;

[0038] Figure 25 is a structural diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. For the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] The terms "first", "second", and the like in the description and in the claims of the present application and in the above drawings do not necessarily have any chronological or sequential significance. Furthermore, the terms "comprise", "comprising", "including", and "having" and variations thereof in the present description and in the claims of the present application are intended to cover a non-exclusive inclusion such that processes, methods, articles, or apparatuses that comprise, include, or have a certain feature are not necessarily limited to the listed feature or steps. For example, a process, method, article, or apparatus that comprises, includes, or has a certain step is not necessarily limited to only that step, but can include additional steps or elements.

[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments.

[0042] It should be noted that the "connection" appearing in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to realize the communication between devices, and no limitation is made on this. The "network" and "system" appearing in the embodiments of the present application represent the same concept, and the communication system is a communication network.

[0043] The technical solutions of the embodiments of the present application can be applied to various wireless communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolved system of the NR system, LTE-based Access to Unlicensed Spectrum (LTE-U) system, NR-based Access to Unlicensed Spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 6th-Generation (6G) communication system, or other communication systems, etc.

[0044] It should be noted that the number of connections supported by the conventional wireless communication system is limited and easy to implement. However, with the development of communication technology, the wireless communication system can not only support the conventional wireless communication system, but also support device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, vehicle to everything (V2X) communication, narrow band internet of things (NB-IoT) communication, etc., so the technical solutions of the embodiments of the present application can also be applied to the above wireless communication systems.

[0045] Optionally, the wireless communication system of the embodiments of the present application can be applied to a beamforming, carrier aggregation (CA), dual connectivity (DC) or standalone (SA) deployment scenario, etc.

[0046] Optionally, the wireless communication system of the embodiments of the present application can be applied to an unlicensed spectrum. The unlicensed spectrum can also be considered as a shared spectrum. Alternatively, the wireless communication system of the embodiments of the present application can also be applied to a licensed spectrum. The licensed spectrum can also be considered as a non-shared spectrum.

[0047] The embodiments of the present application combine terminals and network devices to describe various embodiments, and the terminals and network devices involved will be specifically introduced below.

[0048] Specifically, the terminal can be a user equipment (UE), a remote terminal, a relay device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a mobile device, a user terminal, a smart terminal, a wireless communication device, a user agent or a user device. It should be noted that the relay device is a terminal capable of providing relay forwarding services for other terminals (including remote terminals). In addition, the terminal can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a next-generation communication system (such as an NR communication system or a 6G communication system), or a terminal in a future evolved public land mobile network (PLMN), etc., which is not limited specifically.

[0049] Further, the terminal can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can be deployed on the water surface (such as ships, etc.); can be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0050] Further, the terminal can be a mobile phone, a Pad, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned automatic driving, a wireless terminal device in remote medical treatment, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, or a wireless terminal device in smart home, etc.

[0051] Specifically, the network device can be a device for communicating with the terminal, which is responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission, etc. on the air interface side. Among them, the network device can be a base station (BS) in a communication system or a device deployed in a radio access network (RAN) for providing wireless communication functions. For example, a base transceiver station (BTS) in a GSM or CDMA communication system, a node B (NB) in a WCDMA communication system, an evolved node B (eNB or eNodeB) in an LTE communication system, a next generation evolved node B (ng-eNB) in an NR communication system, a next generation node B (gNB) in an NR communication system, a master node (MN) in a dual-link architecture, a secondary node (SN) in a dual-link architecture, etc., without specific limitation.

[0052] Further, the network device can also be other devices in a core network (CN), such as an access and mobility management function (AMF), a user plan function (UPF), and the like; can also be an access point (AP) in a wireless local area network (WLAN), a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, and the like.

[0053] Further, the network device can include a device with a wireless communication function for the terminal, such as a chip system. For example, the chip system can include a chip, and can also include other discrete devices.

[0054] Further, the network device can communicate with an Internet Protocol (IP) network. For example, the Internet, a private IP network, or other data networks, and the like.

[0055] It should be noted that in some network deployments, the network device can be a standalone node to implement all functions of the above base station, which can include a centralized unit (CU) and a distributed unit (DU), such as gNB-CU and gNB-DU; can also include an active antenna unit (AAU). Among them, the CU can implement part of the functions of the network device, and the DU can also implement part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, implementing the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing the physical layer protocol and real-time service, implementing the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU can implement part of the physical layer processing function, the radio frequency processing, and the related function of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, in this network deployment, the high layer signaling (such as the RRC layer signaling) can be considered as being sent by the DU, or being sent by the DU and the AAU together. It can be understood that the network device can include at least one of the CU, the DU, and the AAU. In addition, the CU can be divided into a network device in the radio access network (RAN), or can be divided into a network device in the core network, which is not limited.

[0056] Further, the network device can have a mobile characteristic, for example, the network device can be a mobile device. Alternatively, the network device can be a satellite, a balloon station. For example, the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Alternatively, the network device can also be a base station arranged at a position on land, water, etc.

[0057] Further, the network device can serve a cell, and terminals in the cell can communicate with the network device through transmission resources (e.g., spectrum resources). The cell can include a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, and the like.

[0058] In combination with the above description, the wireless communication system of the embodiments of the present application is described below.

[0059] For example, the wireless communication system of the embodiments of the present application is described below with reference to Figure 1 The wireless communication system 10 can include a network device 110 and a terminal 120, and the network device 110 can be a device that performs communication with the terminal 120. Meanwhile, the network device 110 can provide communication coverage for a specific geographic area, and can communicate with the terminal 120 located in the coverage area.

[0060] Optionally, the wireless communication system 10 can further include a plurality of network devices, and each network device can include a certain number of terminals in the coverage area, which is not specifically limited herein.

[0061] Optionally, the wireless communication system 10 can further include a network controller, a mobile management entity, and other network entities, which are not specifically limited herein.

[0062] Optionally, the communication between the network device and the terminal in the wireless communication system 10, and the communication between the terminals can be wireless communication or wired communication, which is not specifically limited herein.

[0063] First, the related content involved in the technical solutions of the embodiments of the present application is introduced to facilitate the understanding of those skilled in the art.

[0064] 1. Contention-based 4-step type random access process

[0065] As shown in Figure 2 , for the contention-based 4-step type random access, the entire process includes four steps: random access preamble (RA preamble) transmission, random access response (RAR) message reception, message 3 (Msg3) transmission, and message 4 (Msg4) reception.

[0066] Step one, RA preamble transmission

[0067] The RA preamble, i.e. message 1 (Msg1), can be used to inform the network device of a random access request, so that the network device can estimate the transmission delay between itself and the terminal and calibrate the uplink timing accordingly, and indicate the terminal through the RAR message.

[0068] Step two, RAR message reception

[0069] The RAR message, i.e. message 2 (Msg2), is transmitted through the resource position indicated by the PDCCH scrambled by the RA-RNTI (random access radio network temporary identifier), and the time-frequency position of the resource carrying the RA preamble determines the value of the RA-RNTI. After the terminal transmits the RA preamble, the terminal will listen to the corresponding PDCCH according to the value of the RA-RNTI in the RAR time window to receive the RAR message scrambled by the RA-RNTI. If the RAR message sent by the network device is not received in the RAR time window, the random access process is considered to have failed.

[0070] The RAR message can contain the time adjustment amount required for uplink synchronization, the uplink resource required for the terminal to send message 3, a temporary C-RNTI, etc.

[0071] In addition, since the terminal can randomly select an RA preamble for random access, there may be multiple terminals selecting the same PRACH (physical random access channel) resource and the same RA preamble at the same time, resulting in a collision, i.e. it is impossible to determine which terminal the RAR message is responding to under the same RA-RNTI and RA preamble, and a collision resolution mechanism is needed to solve the collision problem.

[0072] Step three, message 3 transmission

[0073] Msg3, i.e. message 3, is transmitted on the UL-SCH (uplink shared channel), and an important information needs to be included in Msg3: a unique terminal identifier for each terminal. The identifier can be used for the collision resolution in step four. For terminals in RRC_CONNECTED state, the unique identifier is C-RNTI; for non-RRC_CONNECTED state terminals, a unique terminal identifier from the core network (S-TMSI or a random number) is used as its identifier.

[0074] Step four, message 4 reception

[0075] The terminal carries its unique identifier, C-RNTI or a terminal identifier from the core network, in Msg3. In the collision resolution mechanism, the network equipment carries the unique identifier in Msg4 to indicate the winning terminal, and other terminals that do not win in the collision resolution will re-initiate random access. If the terminal receives the PDCCH in Msg4 scrambled by the TC-RNTI specified in the RAR, the terminal considers the random access successful and sets its TC-RNTI to C-RNTI when the UE Contention Resolution Identity MAC control element contained in the successfully decoded MAC PDU matches the CCCH SDU sent in Msg3.

[0076] 2. Contention-based 2-step type random access procedure

[0077] In the R16 version, in order to reduce the terminal access delay, a contention-based 2-step type random access procedure is introduced.

[0078] As shown in Figure 3 , for the contention-based 2-step type random access, the entire process includes the following two steps:

[0079] Step one, MsgA transmission

[0080] The terminal transmits the RA preamble and the message 3 in the above-mentioned 4-step contention-based random access procedure, which is called MsgA, i.e. MsgA can include two parts of RA preamble and physical uplink shared channel (PUSCH).

[0081] Step two, MsgB reception

[0082] The terminal receives the message 2 and the message 4 in the above-mentioned 4-step contention-based random access procedure, which is called MsgB.

[0083] 3、RA preamble

[0084] 1) Composition, classification and number of RA preamble

[0085] The RA preamble can be composed of a cyclic prefix (CP) and a sequence.

[0086] The RA preamble can support 4 long sequences of length 839 and 9 short sequences of length 139, and the length of the sequence composed of the RA preamble can be indicated by the higher layer parameter prach-RootSequenceIndex.

[0087] There can be 64 available RA preambles per cell, which form a RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence. Among them, the terminal selects one (or is specified by the network device) RA preamble from the RA preamble sequence to use the physical random access channel opportunity (PRACH occation, RO) for transmission, that is, the RA preamble is carried (or transmitted) by the RO.

[0088] The above-mentioned RA preamble sequence can include the following two parts:

[0089] One part is the contention-based random access preamble (CBRA preamble) sequence and the contention-free random access preamble (CFRA preamble) sequence configured by the higher layer parameter totalNumberOfRA-Preambles;

[0090] The other part is the other RA preamble sequence other than the one indicated by the higher layer parameter totalNumberOfRA-Preambles. The RA preamble in the other RA preamble sequence is used for other purposes, such as system information (SI) request.

[0091] It is worth noting that if the higher layer parameter totalNumberOfRA-Preambles does not configure the number of specific RA preambles, the above-mentioned 64 RA preambles are used for contention-based random access and contention-free random access.

[0092] In addition, CBRA preambles can be further divided into two groups: group A and group B. Among them, group B does not necessarily exist, which can be configured by the high-layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0093] The network device can configure the parameters required for contention-based random access through the high-layer parameter RACH-ConfigCommon (carried by BWP-Common in SIB1), and the network device can configure the parameters required for non-contention-based random access through the high-layer parameter RACH-ConfigDedicated.

[0094] 2) SSB is associated (or mapped) with PRACH occasion and RA preamble

[0095] The high layer can configure N (configured by the L1 parameter SSB-per-rach-occasion) PRACH occasions associated with one SSB and R consecutive CBRA preamble indexes (configured by the L1 parameter CB-preambles-per-SSB) associated with each SSB in the N SSBs through the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB. Among them, there are two configurations for N as follows:

[0096] If N < 1, one SSB is associated with 1 / N consecutive valid PRACH occasions (for example, if N = 1 / 8, one SSB is associated with 8 PRACH occasions), and R consecutive index CBRA preambles are mapped to SSB n, 0 <= n <= N-1. Among them, the CBRA preamble sequence associated with the SSB starts from CBRA preamble index 0.

[0097] For example, if N = 1 / 8, one SSB is associated with 8 PRACH occasions, and the SSB is associated with 8 preamble indexes starting from 0.

[0098] If N >= 1, N SSBs are associated with one PRACH occasion, and R consecutive index CBRA preambles are mapped to SSB n, 0 <= n <= N-1, and the CBRA preamble sequence associated with the SSB n starts from CBRA preamble index Start. Among them, N is configured by the high layer parameter totalNumberOfRA-Preambles and is an integer multiple of N.

[0099] For example, if N = 2, then two SSBs are associated with 1 PRACH occasion, and the CBRA preamble index associated with SSB 0 starts from 0, and the CBRA preamble index associated with SSB 1 starts from 32. That is, SSB is associated with CBRA preamble with index 0~31, and SSB 1 is associated with index 32~(total number of configured CBRA preamble-1).

[0100] For link recovery, the terminal indicates that N SSBs are associated with one PRACH occasion by the parameter ssb-perRACH-Occation carried by the high layer parameter BeamFailureRecoveryConfig. If N < 1, one SSB is associated with 1 / N consecutive valid PRACH occasions; if N >= 1, N consecutive SSBs are associated with one PRACH occasion.

[0101] In summary, there is an association between SSB and PRACH occasion, and the association (or mapping relationship) between SSB and PRACH occasion should follow the principles:

[0102] First, associate in ascending order of preamble index within one PRACH occasion;

[0103] Second, associate in ascending order of frequency domain PRACH occasion index;

[0104] Third, associate in ascending order of time domain PRACH occasion index within one PRACH slot;

[0105] Fourth, associate in ascending order of PRACH slot index.

[0106] 4, PRACH time-frequency resource

[0107] The time domain PRACH occasion (i.e. the PRACH time domain resource for transmitting RA preamble, or the time domain position of the PRACH occasion) can be configured by the parameter prach-ConfigurationIndex in the high layer parameter RACH-ConfigGeneric.

[0108] The frequency domain PRACH occasion (i.e. the PRACH frequency domain resource where the RA preamble is transmitted, or the frequency domain location of the PRACH occasion) can be configured by the parameter msg1-FrequencyStart and the parameter msg1-FDM in the high layer parameter RACH-ConfigGeneric.

[0109] Wherein, the parameter msg1-FrequencyStart is used to configure the offset of the starting frequency domain location of the PRACH occasion to the starting frequency domain location of the initial BWP or the current active BWP.

[0110] The parameter msg1-FDM is used to configure how many frequency domain PRACH occasions there are on one time domain PRACH occasion.

[0111] 5. CSI-RS association (or mapping) to PRACH occasion

[0112] CSI-RS is similar to SSB, and its ID has a corresponding relationship with the beam. If the random access procedure is triggered by the high layer, and the CSI-RS index is associated with the PRACH occasion, when the parameter ra-PreambleIndex is not 0, the parameter ra-OccasionList indicates the PRACH occasion set associated with the CSI-RS index.

[0113] 6. Msg1 transmission, i.e. RA preamble transmission

[0114] In the random access procedure, the terminal can use the RO to transmit Msg1. Among them, the trigger mode of the random access procedure has the following 3 kinds:

[0115] 1) PDCCH order trigger: the network device tells the terminal that it needs to re-initiate the random access procedure through a special DCI format 1_0, and tells the terminal the ra-PreambleIndex, SSB Index, PRACH MaskIndex and UL / SUL Indicator indicating UL or SUL that should be used.

[0116] 2) MAC layer trigger: the UE selects the RA preamble to initiate the random access procedure by itself.

[0117] 3) RRC layer trigger: such as initial access, re-establishment, handover, RRC_INACTIVE to RRC_CONNECTED state conversion, request for other SI, RRC request at synchronization reconfiguration, etc.

[0118] When the terminal needs to transmit the RA preamble, the following operations need to be performed:

[0119] (1) Select SSB or CSI-RS

[0120] It should be noted that the PRACH occasion contains the RA preamble index. The value range of the RA preamble index has a correlation (or mapping) relationship with the SSB index or the CSI-RS index, and the SSB index or the CSI-RS index has a mapping relationship with the PRACH occasion.

[0121] 1) Select SSB

[0122] For SSB, it can be used in both contention-based random access process and non-contention-based random access process. When selecting SSB, the terminal will select according to different event trigger scenarios, as follows:

[0123] ① Non-contention-based random access process:

[0124] For beam failure and other event triggered non-contention-based random access process (except PRACH order trigger and SI request trigger), the terminal can obtain the SS-RSRP of the SSB through channel estimation, and then compare the SS-RSRP of the SSB with the parameter rsrp-ThresholdSSB. If there is an SSB whose SS-RSRP is greater than rsrp-ThreholdSSB, the terminal selects the SSB.

[0125] For PDCCH order triggered non-contention-based random access process, the terminal directly selects the SSB indicated by the PDCCH order.

[0126] For SI request triggered non-contention-based random access process, if there is an SSB whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal selects the SSB; otherwise, the terminal randomly selects an SSB. If there are multiple SSBs whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal randomly selects one SSB from the multiple SSBs.

[0127] ② Contention-based random access process:

[0128] If there is one SSB whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal selects this SSB; otherwise, the terminal randomly selects one SSB. If there are multiple SSBs whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal randomly selects one SSB from the multiple SSBs.

[0129] 2) Selecting CSI-RS

[0130] For CSI-RS, it can be used in the non-contention-based random access procedure (except for PDCCH order triggering and SI request triggering) and can also be used in the contention-based random access procedure. When selecting the CSI-RS, the CSI-RSRP of the CSI-RS is compared with the parameter rsrp-ThresholdCSI-RS. If there is one CSI-RS whose CSI-RSRP is greater than the parameter rsrp-ThresholdCSI-RS, the terminal selects this CSI-RS.

[0131] (2) Selecting RA preamble index

[0132] ① For the contention-based random access procedure

[0133] The RA preamble index is selected by the terminal. Among them, the terminal needs to determine whether to select the RA preamble from group A or from group B. If there is group B, it needs to be determined by the related configuration parameter whether to select from group B, otherwise select from group A.

[0134] If the terminal has sent Msg3 and the access has failed, the RA preamble used by the terminal when attempting access again should belong to the same group as the RA preamble used when sending Msg3 for the first time.

[0135] After the group is determined, the terminal randomly selects one RA preamble from the RA preambles associated with the selected SSB in the group.

[0136] ② For the non-contention-based random access procedure

[0137] The RA preamble index is indicated by the network device. Among them, the network device has the following two ways to allocate the RA preamble index:

[0138] The first is to configure the ra-PreambleIndex field in the high-level reference PRACH-ConfigDedicated;

[0139] The second is to configure the RandomAccess Preamble index field in the DCI format 1_0 in the PDCCH order triggered random access.

[0140] (3) Select the PRACH resource for transmitting the preamble

[0141] For the non-contention-based random access procedure, the high-level reference PRACH mask index can be used to determine the PRACH resource position of the non-contention-based random access procedure.

[0142] For the contention-based random access procedure, the terminal determines the next available PRACH occasion as the next available PRACH resource position from the SSB associated PRACH occasion after preparing the Msg1; for the non-contention-based random access procedure, the next available PRACH resource position is determined by the PRACH mask index after the UE prepares the Msg1.

[0143] There are four ways to configure the non-contention-based PRACH mask index:

[0144] Indicated by the parameter ra-ssb-OccasionMaskIndex in the high-level parameter PRACH-ConfigDedicated;

[0145] Indicated by the parameter ra-ssb-OccassionMakIndex in the high-level parameter BeamFailureRecoveryConfig;

[0146] Indicated by the parameter ra-ssb-OccassionMakIndex in the parameter SI-RequestResources of the high-level parameter SI-SchedulingInfo in SIB1;

[0147] Indicated by the PRACH mask index in the DCI format 1_0 in the PDCCH order.

[0148] (4) Determine the corresponding RA-RNTI

[0149] The time domain location of PRACH resource determines the RA-RNTI value. After transmitting the RA preamble, the terminal calculates the RA-RNTI associated with the PRACH occasion to accept the RAR scrambled by the RA-RNTI, whose calculation formula is as follows (except for the non-contention-based random access preamble used for beam failure recovery request):

[0150] RA-RNTI = 1 + s_id + 14 x t_id + 14 x 80 x f_id + 14 x 80 x 8 x ul_carrier_id

[0151] Wherein, s_id is the index of the first OFDM symbol of the PRACH occasion (0≤s_id<14), t_id is the index of the first slot of the PRACH occasion in the system frame (0≤t_id<80), f_id is the index of the PRACH occasion in the frequency domain (0≤f_id<8), and ul_carrier_id is the UL carrier used for RA preamble transmission (0 represents a normal uplink carrier, and 1 represents an SUL carrier).

[0152] (5) Determine the target received power of the RA preamble

[0153] 7. MsgA transmission

[0154] In the MsgA transmission of the 2-step type random access, the MsgA includes two parts of the RA preamble and the PUSCH. Among them, the RA preamble is carried by the RO. In order to distinguish the 2-step type random access and the 4-step type random access, the following two ways can be adopted:

[0155] Method 1: The 2-step type random access and the 4-step type random access can share (or share) the RO, but need to adopt different RA preambles;

[0156] Method 2: The 2-step type random access and the 4-step type random access adopt different ROs.

[0157] For the shared (or shared) RO method, the 2-step type random access can share all ROs or a subset of ROs of the 4-step type random access.

[0158] For the method of adopting different ROs, the ROs adopted by the 2-step type random access and the ROs adopted by the 4-step type random access have different indexes in the time domain.

[0159] The process of selecting resources for transmitting MsgA is as follows: the terminal selects an RO associated with an SSB according to channel measurement; selects from group A or group B according to PUSCH transmission packet size requirements in MsgA; determines a PO and DMRS (De-Modulation Reference Signal) configuration under the associated PUSCH configuration according to the selected RO and the selected RA preamble, so as to carry the transmission block of the PUSCH by the PO.

[0160] The CBRA preambles of the 2-step random access type associated with the SSB are configured by the high-level parameter msgA-CB-PreamblesPerSSB-PerSharedRO;

[0161] The sequence position of the CBRA preamble of the 2-step random access type is adjacent to the sequence position of the CFRA preamble.

[0162] The starting index of the CBRA preambles of the 2-step random access type associated with the SSB is configured by the high-level parameter end of the 4-step CBRA preambles for that SSB.

[0163] The access capability indication method of the embodiment of the present application will be described in detail below in combination with the accompanying drawings.

[0164] As shown in the flowchart of the access capability indication method of the embodiment of the present application, the method specifically includes the following steps: Figure 4

[0165] S410, the terminal acquires a first physical random access channel opportunity RO.

[0166] S420, the terminal indicates that the terminal has the capability of supporting accessing the cell of the non-contiguous frequency domain resource according to the first RO or the first random access preamble carried by the first RO in the random access process.

[0167] It can be understood that the terminal can indicate that the terminal has the capability of supporting accessing the cell of the non-contiguous frequency domain resource according to the first RO in the random access process; or,

[0168] The terminal can indicate that the terminal has the capability of supporting accessing the cell of the non-contiguous frequency domain resource according to the first random access preamble carried by the first RO in the random access process.

[0169] ​The first random access preamble can be used to indicate that the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources (or to indicate that the terminal does not have the capability of supporting access to a cell with non-continuous frequency domain resources; or to indicate whether the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources; or to indicate a cell that supports access to non-continuous frequency domain resources; or to indicate a cell that does not support access to non-continuous frequency domain resources; or to indicate whether a cell supports access to non-continuous frequency domain resources), that is, the first random access preamble can be a kind of RA preamble with access capability indication (of a cell with non-continuous frequency domain resources).

[0170] Correspondingly, the network device obtains the first RO or the first random access preamble carried by the first RO in the random access process, and the first RO or the first random access preamble is used to indicate that the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources.

[0171] It can be understood that the network device can obtain the first RO in the random access process, and the first RO is used to indicate that the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources (or to indicate that the terminal does not have the capability of supporting access to a cell with non-continuous frequency domain resources; or to indicate whether the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources; or to indicate a cell that supports access to non-continuous frequency domain resources; or to indicate a cell that does not support access to non-continuous frequency domain resources; or to indicate whether a cell supports access to non-continuous frequency domain resources); or,

[0172] The network device can obtain the first random access preamble carried by the first RO in the random access process.

[0173] It should be noted that, with the continuous evolution of the standard protocol formulated by 3GPP and the continuous complication of the communication scene, the frequency domain resources in the cell can be non-continuous. Since some terminals can support access to a cell with non-continuous frequency domain resources, and some other terminals can not support access to a cell with non-continuous frequency domain resources, when these terminals need to access the same cell, in order to ensure that the network device can identify whether the terminal has the capability of supporting access to a cell with non-continuous frequency domain resources from the terminals, the access capability of the terminal needs to be indicated to the network device.

[0174] Based on this, in the embodiments of the present application, in order to realize the indication of whether the terminal has the capability of supporting the access to the non-contiguous frequency domain resource cell (i.e., the access capability), the terminal can acquire the first RO when supporting the access to the non-contiguous frequency domain resource cell, and indicate that it has the capability of supporting the access to the non-contiguous frequency domain resource cell (or indicate that it supports the access to the non-contiguous frequency domain resource cell) according to the first RO or the first random access preamble carried by the first RO in the random access process, so as to realize the indication of the access capability (of the non-contiguous frequency domain resource cell) of the terminal to the network device through the RO or the random access preamble in the random access process.

[0175] Similarly, in order to ensure that the network device can learn the access capability (of the non-contiguous frequency domain resource cell) of the terminal, the network device can acquire the first RO or the first random access preamble carried by the first RO in the random access process, so as to realize the possibility of learning the access capability (of the non-contiguous frequency domain resource cell) of the terminal through the indication of the RO or the indication of the random access preamble in the random access process.

[0176] In combination with the above description, the access capability indication method of the embodiments of the present application is described in detail below.

[0177] Part I:

[0178] The embodiments of the present application are described in detail below in relation to the related concepts involved in the above method.

[0179] 1. Non-contiguous frequency domain resource

[0180] The non-contiguous frequency domain resource in the embodiments of the present application can be non-contiguous frequency domain resources within the same cell. That is, the resources in the non-contiguous frequency domain resource can belong to the same cell.

[0181] For the non-contiguous frequency domain resource cell, it can be understood that the network device configures the frequency domain resources in a certain cell to be non-contiguous. The resources in the non-contiguous frequency domain resource can include multiple carriers or multiple bandwidth parts (bandwidth part, BWP), which are described in detail as follows:

[0182] 1) The resources in the non-contiguous frequency domain resource can include multiple carriers.

[0183] It should be noted that the frequency domain resources between the adjacent two carriers in the multiple carriers can be non-contiguous, and the frequency domain resources within each carrier can be contiguous or non-contiguous.

[0184] For the frequency domain resources between the two adjacent carriers to be non-continuous, it can be understood that, under the same subcarrier spacing (or the same numerology), the two adjacent carriers are non-overlapping in the frequency domain, or there is a frequency interval between the frequency domain resources of the two adjacent carriers.

[0185] For example, refer to Figure 5 , the network device is configured with 4 carriers for a cell, i.e., carrier 501, carrier 502, carrier 503, and carrier 504. Among them, the frequency domain resources between the two adjacent carriers are non-continuous, and the frequency domain resources of each carrier are continuous, so that the frequency domain resources configured to the terminal in the same cell are non-continuous.

[0186] 2) The resources in the non-continuous frequency domain resources can include multiple bandwidth parts.

[0187] It should be noted that the frequency domain resources between the two adjacent BWP in the multiple BWP can be non-continuous, and the frequency domain resources in each BWP can be continuous.

[0188] For the frequency domain resources between the two adjacent BWP to be non-continuous, it can be understood that, under the same subcarrier spacing (or the same numerology), the two adjacent BWP are non-overlapping in the frequency domain, or there is a frequency interval between the frequency domain resources of the two adjacent BWP.

[0189] In addition, the BWP in the multiple BWP can be in the same carrier or in different carriers, and the different carriers belong to the same cell.

[0190] For example, taking the BWP in the same carrier as an example, refer to Figure 6 . The network device is configured with 1 carrier for a cell, i.e., carrier 610, and the carrier 610 contains four bandwidth parts, i.e., BWP 6101, BWP 6102, BWP 6103 and BWP 6104, and the frequency domain resources between the two adjacent BWP are non-continuous, and the frequency domain resources of each BWP are continuous, so that the frequency domain resources configured to the terminal in the same cell are non-continuous.

[0191] For example, taking the BWP in different carriers as an example, refer to Figure 7 . The network device is configured with 3 carriers for a cell, i.e., carrier 710, carrier 720 and carrier 730, and the frequency domain resources of the carrier 730 are non-continuous. Among them, the carrier 710 contains two BWP, i.e., BWP 7101 and BWP 7102, the frequency domain resources between the two adjacent BWP are non-continuous, and the frequency domain resources of each BWP are continuous, so that the frequency domain resources of the configured carrier 710 are non-continuous.

[0192] Similarly, the carrier 720 contains three bandwidth parts, i.e., the BWP 7201, the BWP 7202, and the BWP 7203, the frequency domain resources between two adjacent BWPs are discontinuous, and the frequency domain resources of each BWP are continuous, so that the frequency domain resources of the configured carrier 720 are discontinuous.

[0193] In addition, the frequency domain resources between the BWP 7102 in the carrier 710 and the BWP 7201 in the carrier 720 are discontinuous. In summary, the frequency domain resources configured by the carrier 710, the carrier 720, and the carrier 730 in the same cell of the terminal are discontinuous.

[0194] In summary, the terminal of the embodiment of the present application can support accessing the cell of the discontinuous frequency domain resources, i.e., has the capability of accessing the cell of the discontinuous frequency domain resources, and the resources in the discontinuous frequency domain resources can include multiple carriers or multiple bandwidth parts; wherein the frequency domain resources between two adjacent carriers can be discontinuous, or the frequency domain resources between two adjacent bandwidth parts can be discontinuous.

[0195] 2, first RO and first random access preamble

[0196] It should be noted that in the process of establishing communication between the terminal and the network device, the network device can configure the terminal with parameters for random access, such as high-layer parameters RACH-ConfigCommon, RACH-ConfigCommonTwoStepRA, RACH-ConfigDedicated, RACH-ConfigGeneric, RACH-ConfigGenericTwoStepRA, etc.

[0197] In addition, the network device can configure the terminal with PRACH time-frequency resources for random access, and the PRACH time-frequency resources can include a RO set for transmitting (or carrying) a RA preamble. Wherein, the RO set can include ROs for 4-step type random access, ROs for 2-step type random access, ROs shared (or shared) by 4-step type random access and 2-step type random access, etc.

[0198] In the embodiment of the present application, in order to indicate the access capability (of the cell of the discontinuous frequency domain resources) of the terminal, the RO set configured by the network device to the terminal can contain a dedicated or specific RO (i.e., a first RO), which can be used to indicate the access capability of the terminal, or which can carry a RA preamble (i.e., a first random access preamble) for access capability indication.

[0199] (1) The first RO

[0200] 1) The first RO can belong to (or be) an RO of 4-step type random access, an RO of 2-step type random access, or an RO shared (or common) by 4-step type random access and 2-step type random access.

[0201] For the RO of 4-step type random access, it can be understood as the RO adopted by 4-step type random access. Therefore, when the terminal uses the RO of 4-step type random access to transmit the RA preamble, it means that the random access performed by the terminal is 4-step type random access.

[0202] For the RO of 2-step type random access, it can be understood as the RO adopted by 2-step type random access. Therefore, when the terminal uses the RO of 2-step type random access to transmit the RA preamble, it means that the random access performed by the terminal is 2-step type random access.

[0203] For the RO shared (or common) by 4-step type random access and 2-step type random access, it can be understood in combination with the above-mentioned “Msg1 transmission” and “MsgA transmission” that 2-step type random access and 4-step type random access can adopt the shared (or common) RO mode or different ROs. Among them, for the shared (or common) RO mode, 2-step type random access can share all ROs or a subset of ROs of 4-step type random access, but needs to adopt different RA preambles; for the different RO mode, the RO adopted by 2-step type random access and the RO adopted by 4-step type random access have different indexes in the time domain.

[0204] 2) The first RO can belong to (or be) an RO specially (dedicated) configured for the terminal by a high-layer parameter.

[0205] At this time, the time-frequency domain position of the first RO can be configured by terminal-specific higher layer signaling (UE-specific higher layer signaling). For example, the time domain position of the first RO can be configured by the dedicated parameter prach-ConfigurationIndex in the high-layer parameter RACH-ConfigGeneric, and the frequency domain position of the first RO can be configured by the dedicated parameter msg1-FrequencyStart and the dedicated parameter msg1-FDM in the high-layer parameter. Among them, the dedicated parameter msg1-FrequencyStart is used to configure the offset of the starting frequency domain position of the first RO to the starting frequency domain position of the initial BWP or the current active BWP; the dedicated parameter msg1-FDM is used to configure how many frequency domain first ROs there are on a time domain first RO.

[0206] In summary, the first RO can belong to one of the following: an RO of 4-step type random access, an RO of 2-step type random access, an RO specially configured for the terminal by a high-layer parameter, and an RO shared by 4-step type random access and 2-step type random access.

[0207] (2) First random access preamble

[0208] As can be known from the above description of the “RA preamble”, the cell of the non-continuous frequency domain resource in the embodiments of the present application can have an RA preamble sequence composed of 64 available RA preambles. The RA preamble sequence can include at least one of a CBRA preamble sequence, a CFRA preamble sequence, and other RA preamble sequences. Among them, the CBRA preamble sequence and the CFRA preamble sequence can be configured by a high-layer parameter totalNumberOfRA-Preambles.

[0209] Since the random access performed by the terminal in the embodiments of the present application is a contention-based random access (such as 4-step type random access or 2-step type random access), the first random access preamble (i.e., the first random access preamble carried by the first RO) transmitted by the terminal using the first RO can belong to the CBRA preamble. That is, the first random access preamble is an RA preamble selected from the CBRA preamble sequence.

[0210] In summary, in the embodiments of the present application, the RA preamble sequence contained in the cell of the non-continuous frequency domain resource has a sequence composed of the RA preamble with the access capability indication (of the cell of the non-continuous frequency domain resource). Among them, the RA preamble selected from the sequence can be used as the first random access preamble in the embodiments of the present application.

[0211] (3) The first RO and the first random access preamble are associated with the SSB

[0212] As can be known from the above description of the “Msg1 transmission”, in the contention-based random access process, the terminal can compare the SS-RSRP obtained by channel measurement with the parameter rsrp-ThresholdSSB to select an SSB, and determine the RO and the CBRA preamble of 4-step type random access associated with the selected SSB through the high-layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0213] Therefore, the first random access preamble can include at least one of the 4-step type random access CBRA preambles associated with the SSB in the SSB associated 4-step type random access CBRA preamble sequence.

[0214] As can be known from the above description of the "MsgA transmission", in the contention-based 2-step type random access procedure, the terminal can compare the S-RSRP obtained through channel measurement with the parameter rsrp-ThresholdSSB to select an SSB, and determine the 2-step type random access CBRA preambles associated with the selected SSB through the high-level parameter msgA-CB-PreamblesPerSSB-PerSharedRO, while the starting index of the 2-step type random access CBRA preambles associated with the selected SSB is configured by the high-level parameter end of the 4-step CBRA preambles for that SSB.

[0215] (4) The first RO is associated with a CSI-RS

[0216] The CSI-RS is similar to the SSB, and its ID has a corresponding relationship with a beam.

[0217] As can be known from the above description of the "Msg1 transmission", in the contention-based random access procedure, the terminal can compare the CSI-RSRP obtained through channel measurement with the parameter rsrp-ThresholdCSI-RS to select a CSI-RS.

[0218] If the random access procedure is triggered by a high level, and the selected CSI-RS is associated with a PRACH occasion, when the parameter ra-PreambleIndex is not 0, the parameter ra-OccasionList indicates the PRACH occasion set associated with the selected CSI-RS.

[0219] (5) Random access

[0220] It should be noted that in the embodiments of the present application, the random access performed by the terminal or the network device can be one of contention-based random access, contention-based 4-step type random access, and contention-based 2-step type random access. The random access can be triggered by a PDCCH order, a MAC layer, or an RRC layer, etc., and the specific details are described in the above description of the "Msg1 transmission".

[0221] In summary, in Part One, the terminal can select a first RO from the RO set configured by the network device, so as to realize the indication of the access capability of the terminal (non-continuous frequency domain resource cell) to the network device through the RO in the random access process.

[0222] In addition, the RA preamble sequence included in the non-continuous frequency domain resource cell of the embodiment of the present application can include at least one of the following:

[0223] ① CBRA preamble sequence;

[0224] The CBRA preamble sequence can include the CBRA preamble sequence of the 4-step type random access and / or the CBRA preamble sequence of the 2-step type random access.

[0225] The 4-step or 2-step type CBRA preamble sequence can further include at least one of the following:

[0226] The RA preamble sequence for indicating that the non-continuous frequency domain resource cell is not supported for access;

[0227] The RA preamble sequence (i.e., the first random access preamble sequence) for indicating that the non-continuous frequency domain resource cell is supported for access;

[0228] The RA preamble sequence for indicating that the uplink coverage enhancement is supported;

[0229] The RA preamble sequence for indicating that the uplink coverage enhancement is not supported;

[0230] The RA preamble sequence for indicating that the non-continuous frequency domain resource cell is not supported for access and the uplink coverage enhancement is not supported;

[0231] The RA preamble sequence for indicating that the non-continuous frequency domain resource cell is not supported for access and the uplink coverage enhancement is supported;

[0232] The RA preamble sequence for indicating that the non-continuous frequency domain resource cell is supported for access and the uplink coverage enhancement is not supported;

[0233] The RA preamble sequence for indicating that the non-continuous frequency domain resource cell is supported for access and the uplink coverage enhancement is supported;

[0234] and so on;

[0235] ② CFRA preamble sequence;

[0236] ③ Other RA preamble sequences.

[0237] Part II:

[0238] The arrangement order between the RA preamble sequences of each type in Part I is described below to select the first random access preamble of the embodiment of the present application.

[0239] 1. Arrangement order between CBRA preamble sequences, CFRA preamble sequences and other RA preamble sequences

[0240] It should be noted that the arrangement between the CBRA preamble sequences, the CFRA preamble sequences and the other RA preamble sequences is sequentially processed, as shown in Figure 8 .

[0241] 2. CBRA preamble sequences of 4-step type random access, CBRA preamble sequences of 2-step type random access

[0242] (1) 2-step type random access and 4-step type random access use different ROs

[0243] The ROs of the 4-step type random access and the ROs of the 2-step type random access are not shared (or not shared), and there are the following two:

[0244] ① When the random access is performed is the 4-step type random access based on contention, the terminal uses the RO of the 4-step type random access to transmit the RA preamble. At this time, the RA preamble is one RA preamble selected by the terminal from the CBRA preamble sequences of the 4-step type random access included in the CBRA preamble sequences.

[0245] ② When the random access is performed is the 2-step type random access based on contention, the terminal uses the RO of the 2-step type random access to transmit the RA preamble. At this time, the RA preamble is one RA preamble selected by the terminal from the CBRA preamble sequences of the 2-step type random access included in the CBRA preamble sequences.

[0246] (2) 2-step type random access and 4-step type random access share (or share) ROs

[0247] The ROs of the 4-step type random access and the ROs of the 2-step type random access are shared (or shared), and there is the following one:

[0248] When the ongoing random access is the contention-based random access, the terminal uses the RO shared by the 4-step type random access and the 2-step type random access to transmit the RA preamble. At this time, the RA preamble is one RA preamble selected by the terminal from the CBRA preamble sequence of the 4-step type random access and the CBRA preamble sequence of the 2-step type random access included in the CBRA preamble sequence.

[0249] There are two arrangement orders as follows:

[0250] ① The position of the CBRA preamble sequence of the 4-step type random access is before the CBRA preamble sequence of the 2-step type random access.

[0251] For example, as shown in Figure 9

[0252] ② The position of the CBRA preamble sequence of the 4-step type random access is after the CBRA preamble sequence of the 2-step type random access.

[0253] 3. Each type of RA preamble sequence in the CBRA preamble sequence

[0254] Since there can be multiple RA preamble sequences with different indication capabilities in the CBRA preamble sequence, the following will be described by cases.

[0255] Case 1:

[0256] The CBRA preamble sequence includes the RA preamble sequence for indicating the cell not supporting the access to the non-continuous frequency domain resource and the RA preamble sequence for indicating the cell supporting the access to the non-continuous frequency domain resource. There are two arrangement orders as follows in the "Case 1":

[0257] 1) The position of the RA preamble sequence for indicating the cell not supporting the access to the non-continuous frequency domain resource is before the RA preamble sequence for indicating the cell supporting the access to the non-continuous frequency domain resource.

[0258] 2) The position of the RA preamble sequence for indicating the cell not supporting the access to the non-continuous frequency domain resource is after the RA preamble sequence for indicating the cell supporting the access to the non-continuous frequency domain resource.

[0259] ​In the embodiments of the present application, for the RA preamble sequence used for indicating the cell supporting accessing non-contiguous frequency domain resources, it can be understood that the first random access preamble belongs to the sequence.

[0260] The following further describes whether the ROs used by the 2-step type random access and the 4-step type random access are shared (or shared),

[0261] (1) Different ROs are used between the 2-step type random access and the 4-step type random access

[0262] a) When the 4-step type random access based on contention is performed, the CBRA preamble sequence includes the CBRA preamble sequence of the 4-step type random access, and the first RO used by the terminal belongs to (or is) the RO of the 4-step type random access.

[0263] At this time, for the RA preamble sequence used for indicating the cell supporting accessing non-contiguous frequency domain resources, it can be understood that the 4-step type CBRA RA preamble sequence used for indicating the cell supporting accessing non-contiguous frequency domain resources, that is, the first random access preamble belongs to the CBRA preamble sequence of the 4-step type random access.

[0264] Similarly, for the RA preamble sequence used for indicating the cell not supporting accessing non-contiguous frequency domain resources, it can be understood that the 4-step type CBRA RA preamble sequence used for indicating the cell not supporting accessing non-contiguous frequency domain resources, that is, the second random access preamble belongs to the CBRA preamble sequence of the 4-step type random access.

[0265] The second random access preamble is the CBRA preamble of the 4-step type random access used for indicating the cell not supporting accessing non-contiguous frequency domain resources.

[0266] Therefore, there are two arrangement orders as follows:

[0267] 1) The first random access preamble belongs to the sequence before the second random access preamble belongs to the sequence;

[0268] It can be understood that the CBRA preamble used for indicating the cell supporting accessing non-contiguous frequency domain resources is before the CBRA preamble used for indicating the cell supporting accessing non-contiguous frequency domain resources.

[0269] 2) The first random access preamble belongs to the sequence after the second random access preamble belongs to the sequence;

[0270] It can be understood that the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources is after the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources.

[0271] For example, referring to FIG. 8, an example is taken that the sequence to which the first random access preamble belongs is after the sequence to which the second random access preamble belongs. Figure 10

[0272] b) When the contention-based 2-step type random access is performed, the CBRA preamble sequence includes the CBRA preamble sequence of the 2-step type random access, and the first RO used by the terminal belongs to (or is) the RO of the 2-step type random access.

[0273] At this time, the sequence to which the first random access preamble belongs is the CBRA preamble sequence of the 2-step type random access.

[0274] Similarly, for the RA preamble sequence for indicating the cell not supporting accessing non-contiguous frequency domain resources, it can be understood that the CBRA preamble sequence for indicating the 2-step type random access of the cell not supporting accessing non-contiguous frequency domain resources, that is, the sequence to which the third random access preamble belongs is the CBRA preamble sequence of the 2-step type random access.

[0275] The third random access preamble is the CBRA preamble for indicating the 2-step type random access of the cell not supporting accessing non-contiguous frequency domain resources.

[0276] Therefore, there are two arrangement orders as follows:

[0277] 1) The sequence to which the first random access preamble belongs is before the sequence to which the third random access preamble belongs;

[0278] It can be understood that the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources is before the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources.

[0279] 2) The sequence to which the first random access preamble belongs is after the sequence to which the third random access preamble belongs;

[0280] It can be understood that the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources is after the CBRA preamble for indicating the cell supporting accessing non-contiguous frequency domain resources.

[0281] ​For example, referring to FIG. 8, the sequence to which the first random access preamble belongs is behind the sequence to which the third random access preamble belongs. Figure 11

[0282] (2) 2-step type random access and 4-step type random access share (or share) RO

[0283] When the contention-based random access is performed, the CBRA preamble sequence includes the CFRA preamble sequence of the 4-step type random access and the CFRA preamble sequence of the 2-step type random access, and the first RO used by the terminal belongs to the RO shared by the 4-step type random access and the 2-step type random access.

[0284] At this time, the sequence to which the first random access preamble belongs can belong to the CBRA preamble sequence of the 4-step type random access, or can belong to the CBRA preamble sequence of the 2-step type random access.

[0285] And as known from the above, the sequence to which the second random access preamble belongs belongs to the CBRA preamble sequence of the 4-step type random access, and the sequence to which the third random access preamble belongs belongs to the CBRA preamble sequence of the 2-step type random access.

[0286] Therefore, in the case of sharing the RO, it is necessary to jointly consider the factor of whether to support the cell accessing the non-continuous frequency domain resource (i.e. factor 1) and the factor of the arrangement order between the CBRA preamble sequence of the 4-step type random access and the CBRA preamble sequence of the 2-step type random access (i.e. factor 2) on the arrangement order among the above three.

[0287] Among them, the influence of factor 1 on the arrangement order among the above three is as follows:

[0288] the CBRA preamble indicating that the cell supporting accessing the non-continuous frequency domain resource is behind the CBRA preamble indicating that the cell not supporting accessing the non-continuous frequency domain resource; or,

[0289] the CBRA preamble indicating that the cell supporting accessing the non-continuous frequency domain resource is before the CBRA preamble indicating that the cell not supporting accessing the non-continuous frequency domain resource.

[0290] Among them, the influence of factor 2 on the arrangement order among the above three is as follows:

[0291] the position of the CBRA preamble sequence of the 4-step type random access is before the CBRA preamble sequence of the 2-step type random access; or,​

[0292] The CBRA preamble sequence of the 4-step type random access is located after the CBRA preamble sequence of the 2-step type random access.

[0293] Therefore, for the case that both the factor 1 and the factor 2 affect the above-mentioned three arrangement sequences, the embodiment of the present application can first consider the factor 1 and then consider the factor 2, or first consider the factor 2 and then consider the factor 1, based on the priority criterion.

[0294] a) For the case that the factor 1 is considered first and then the factor 2, there are multiple arrangement sequences as follows:

[0295] ① The first arrangement sequence:

[0296] When the influence of the factor 1 on the arrangement sequence is:

[0297] The CBRA preamble sequence of the 2-step type random access is located after the CBRA preamble sequence of the 4-step type random access.

[0298] And the influence of the factor 2 on the arrangement sequence is:

[0299] The CBRA preamble sequence of the 2-step type random access is located after the CBRA preamble sequence of the 4-step type random access.

[0300] At this time, the sequence to which the first random access preamble belongs is located after the sequences to which the second random access preamble and the third random access preamble belong, and the sequence to which the second random access preamble belongs is located after the sequence to which the third random access preamble belongs.

[0301] For example, as shown in Figure 12 .

[0302] ② The second arrangement sequence:

[0303] When the influence of the factor 1 on the arrangement sequence is:

[0304] The CBRA preamble sequence of the 2-step type random access is located after the CBRA preamble sequence of the 4-step type random access.

[0305] And the influence of the factor 2 on the arrangement sequence is:

[0306] The CBRA preamble sequence of the 2-step type random access is located after the CBRA preamble sequence of the 4-step type random access.

[0307] At this time, the sequence to which the first random access preamble belongs is before the sequence to which the second random access preamble belongs and the sequence to which the third random access preamble belongs, and the sequence to which the second random access preamble belongs is before the sequence to which the third random access preamble belongs.

[0308] As shown in the example. Figure 13

[0309] Similarly, other arrangement orders can be known, and details are not repeated.

[0310] b) For the case of considering factor 2 first and then considering factor 1, the embodiment of the application only gives the following arrangement order, and similarly, other arrangement orders can be known, and details are not repeated.

[0311] ① The first arrangement order is:

[0312] When the influence of factor 2 on the arrangement order is:

[0313] The position of the CBRA preamble sequence of the 4-step type random access is before the CBRA preamble sequence of the 2-step type random access;

[0314] And the influence of factor 1 on the arrangement order is:

[0315] The CBRA preamble for indicating a cell supporting access to non-contiguous frequency domain resources is after the CBRA preamble for indicating a cell not supporting access to non-contiguous frequency domain resources;

[0316] At this time, the sequence to which the second random access preamble belongs is before the sequence to which the third random access preamble belongs, and

[0317] If the sequence to which the first random access preamble belongs belongs to the CBRA preamble sequence of the 4-step type random access, the sequence to which the first random access preamble belongs is before the sequence to which the third random access preamble belongs, that is, the sequence to which the first random access preamble belongs is between the sequence to which the second random access preamble belongs and the sequence to which the third random access preamble belongs, as shown in the example. Figure 14

[0318] If the sequence to which the first random access preamble belongs belongs to the CBRA preamble sequence of the 2-step type random access, the sequence to which the first random access preamble belongs is after the sequence to which the third random access preamble belongs, that is, the sequence to which the first random access preamble belongs is after the sequence to which the second random access preamble belongs and the sequence to which the third random access preamble belongs, as shown in the example. Figure 15

[0319] In summary, in the "case one", the following arrangement order can exist: ​​​

[0320] If the first RO belongs to the RO of 4-step type random access, and the RO of 4-step type random access does not share with the RO of 2-step type random access, the position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the second random access preamble belongs.

[0321] If the first RO belongs to the RO of 2-step type random access, and the RO of 2-step type random access does not share with the RO of 4-step type random access, the position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the third random access preamble belongs.

[0322] If the first RO belongs to the RO shared by 4-step type random access and 2-step type random access, the position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the second random access preamble belongs and the position of the sequence to which the third random access preamble belongs.

[0323] and so on.

[0324] Case two:

[0325] The CBRA preamble sequence includes the RA preamble sequence for simultaneously indicating the cell not supporting access to non-continuous frequency domain resources and the cell not supporting uplink coverage enhancement, the RA preamble sequence for simultaneously indicating the cell not supporting access to non-continuous frequency domain resources and the cell supporting uplink coverage enhancement, the RA preamble sequence for simultaneously indicating the cell supporting access to non-continuous frequency domain resources and the cell not supporting uplink coverage enhancement, and the RA preamble sequence for simultaneously indicating the cell supporting access to non-continuous frequency domain resources and the cell supporting uplink coverage enhancement.

[0326] It should be noted that, unlike the above-mentioned "case one", the embodiment of the present application further introduces the factor of whether the terminal has the capability of supporting uplink coverage enhancement (i.e. factor 3).

[0327] In "case two", whether the terminal has the capability of supporting access to the cell of non-continuous frequency domain resources and whether the terminal has the capability of supporting uplink coverage enhancement can be indicated by the same RA preamble.

[0328] Therefore, the first random access preamble of the embodiment of the present application can be used to simultaneously indicate that the terminal has the capability of supporting access to the cell of non-continuous frequency domain resources and has the capability of supporting uplink coverage enhancement. At this time, the sequence to which the first random access preamble belongs can be understood as the RA preamble sequence for simultaneously indicating the cell supporting access to non-continuous frequency domain resources and the cell supporting uplink coverage enhancement.

[0329] In addition, the influence of factor 3 on the arrangement order is as follows:

[0330] the CBRA preamble indicating support of uplink coverage enhancement is after the CBRA preamble indicating non-support of uplink coverage enhancement; or

[0331] the CBRA preamble indicating support of uplink coverage enhancement is before the CBRA preamble indicating non-support of uplink coverage enhancement.

[0332] Therefore, for the case that both factor 1 and factor 3 affect the arrangement sequence, the embodiment of the present application can first consider factor 1 and then consider factor 3, or first consider factor 3 and then consider factor 1 based on the priority criterion.

[0333] a) For the case that first consider factor 1 and then consider factor 3, the embodiment of the present application only gives the following one arrangement order, and other arrangement orders can be known by analogy, and will not be described here.

[0334] ① The first arrangement order is:

[0335] When the influence of factor 1 on the arrangement order is:

[0336] the CBRA preamble indicating support of access to non-continuous frequency domain resource cell is after the CBRA preamble indicating non-support of access to non-continuous frequency domain resource cell;

[0337] and the influence of factor 3 on the arrangement order is:

[0338] the CBRA preamble indicating support of uplink coverage enhancement is after the CBRA preamble indicating non-support of uplink coverage enhancement.

[0339] At this time, the four of the RA preamble sequence for simultaneously indicating non-continuous frequency domain resource cell and non-support of uplink coverage enhancement, the RA preamble sequence for simultaneously indicating non-continuous frequency domain resource cell and support of uplink coverage enhancement, the RA preamble sequence for simultaneously indicating support of access to non-continuous frequency domain resource cell and non-support of uplink coverage enhancement, and the RA preamble sequence for simultaneously indicating support of access to non-continuous frequency domain resource cell and support of uplink coverage enhancement are sequentially sorted, as shown in Figure 16 .

[0340] b) For the case that first consider factor 3 and then consider factor 1, the embodiment of the present application only gives the following one arrangement order, and other arrangement orders can be known by analogy, and will not be described here.

[0341] ① The first arrangement order is:

[0342] When the influence of factor 3 on the arrangement order is:

[0343] to indicate that the CBRA preamble supporting uplink coverage enhancement is behind the CBRA preamble not supporting uplink coverage enhancement;

[0344] While the influence of factor 1 on the arrangement order is:

[0345] to indicate that the CBRA preamble supporting cell access to non-contiguous frequency domain resources is behind the CBRA preamble indicating that the cell does not support access to non-contiguous frequency domain resources;

[0346] At this time, the four RA preamble sequences for simultaneously indicating the cell not supporting access to non-contiguous frequency domain resources and not supporting uplink coverage enhancement, the RA preamble sequence for simultaneously indicating the cell supporting access to non-contiguous frequency domain resources and not supporting uplink coverage enhancement, the RA preamble sequence for simultaneously indicating the cell not supporting access to non-contiguous frequency domain resources and supporting uplink coverage enhancement, and the RA preamble sequence for simultaneously indicating the cell supporting access to non-contiguous frequency domain resources and supporting uplink coverage enhancement are sequentially arranged, as shown in Figure 17

[0347] Next, whether the ROs used by the 2-step type random access and the 4-step type random access are shared (or shared) is further described,

[0348] (1) The 2-step type random access and the 4-step type random access use different ROs

[0349] When performing contention-based 4-step random access, each type of sequence included in the CBRA preamble sequence belongs to the CBRA preamble sequence of the 4-step type random access.

[0350] At this time, the arrangement order between each type of sequence included in the CBRA preamble sequence is consistent with the above, and this will not be described again.

[0351] Similarly, when performing contention-based 2-step random access, each type of sequence included in the CBRA preamble sequence belongs to the CBRA preamble sequence of the 2-step type random access.

[0352] At this time, the arrangement order between each type of sequence included in the CBRA preamble sequence is consistent with the above, and this will not be described again.

[0353] (2) The 2-step type random access and the 4-step type random access share (or share) RO

[0354] ​Based on the same reason, in the case of sharing RO, the embodiment of the application needs to jointly consider the influence of factor 1, factor 2 and factor 3 on the arrangement sequence.

[0355] Similarly, the embodiment of the application can consider factor 1, factor 2 and factor 3 based on the priority criterion.

[0356] The following embodiment of the application only gives a case of considering factor 2 first, then considering factor 3, and finally considering factor 1, and similarly, the arrangement order under other priority criteria can be known, which will not be described here.

[0357] ① The first arrangement order:

[0358] When the influence of factor 2 on the arrangement order is:

[0359] 4-step type random access CBRA preamble sequence is before 2-step type random access CBRA preamble sequence;

[0360] When the influence of factor 3 on the arrangement order is:

[0361] CBRA preamble for indicating support of uplink coverage enhancement is after CBRA preamble for indicating no support of uplink coverage enhancement

[0362] When the influence of factor 1 on the arrangement order is:

[0363] CBRA preamble for indicating support of cell accessing non-contiguous frequency domain resource is after CBRA preamble for indicating no support of cell accessing non-contiguous frequency domain resource.

[0364] At this time, RA preamble sequence for simultaneously indicating no support of cell accessing non-contiguous frequency domain resource and no support of uplink coverage enhancement, RA preamble sequence for simultaneously indicating support of cell accessing non-contiguous frequency domain resource and no support of uplink coverage enhancement, RA preamble sequence for simultaneously indicating no support of cell accessing non-contiguous frequency domain resource and support of uplink coverage enhancement, and RA preamble sequence for simultaneously indicating support of cell accessing non-contiguous frequency domain resource and support of uplink coverage enhancement are sequentially arranged, as shown in Figure 18 .

[0365] As described above, in "case two", the following arrangement order can exist:

[0366] If the first random access preamble is also used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access does not share the RO of the 2-step type random access, the position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the fourth random access preamble is located; the fourth random access preamble is a random access preamble used for indicating the 4-step type random access of the cell supporting access to non-continuous frequency domain resources and not supporting uplink coverage enhancement at the same time.

[0367] If the first random access preamble is also used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO of the 2-step type random access, and the RO of the 2-step type random access does not share the RO of the 4-step type random access, the position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the fifth random access preamble is located; the fifth random access preamble is a random access preamble used for indicating the 2-step type random access of the cell not supporting access to non-continuous frequency domain resources and not supporting uplink coverage enhancement at the same time.

[0368] If the first RO belongs to the RO shared by the 4-step type random access and the 2-step type random access, the position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the fourth random access preamble belongs and the position of the sequence to which the fifth random access preamble belongs.

[0369] and so on.

[0370] Case three:

[0371] The CBRA preamble sequence includes the RA preamble sequence used for indicating the cell not supporting access to non-continuous frequency domain resources, the RA preamble sequence used for indicating the cell supporting access to non-continuous frequency domain resources (i.e., the sequence to which the first random access preamble belongs), the RA preamble sequence used for indicating the capability of supporting uplink coverage enhancement, and the RA preamble sequence used for indicating the capability of not supporting uplink coverage enhancement.

[0372] It should be noted that, unlike the above-mentioned "case one", the embodiment of the present application further introduces the factor of whether the terminal has the capability of supporting uplink coverage enhancement (i.e., factor 3).

[0373] Meanwhile, unlike the above-mentioned "case two", whether the terminal has the capability of supporting the cell supporting access to non-continuous frequency domain resources and whether the terminal has the capability of supporting uplink coverage enhancement are indicated by different RA preambles.

[0374] Therefore, the first random access preamble of the embodiment of the present application can only be used to indicate that the terminal has the capability of supporting the cell accessing the non-continuous frequency domain resource, and cannot indicate the capability of supporting the uplink coverage enhancement, i.e., the capability of the terminal supporting the uplink coverage enhancement is not indicated by the first random access preamble.

[0375] Similar to the above "Case Two", both the factor 1 and the factor 3 affect the arrangement sequence. Similarly, the embodiment of the present application can first consider the factor 1 and then consider the factor 3, or first consider the factor 3 and then consider the factor 1 based on the priority rule.

[0376] a) For the case of first considering the factor 1 and then considering the factor 3, the embodiment of the present application only gives the following one arrangement sequence, and other arrangement sequences can be known by analogy, and will not be described here.

[0377] ① The first arrangement sequence:

[0378] When the influence of the factor 1 on the arrangement sequence is:

[0379] the CBRA preamble for indicating the cell supporting the access to the non-continuous frequency domain resource is arranged after the CBRA preamble for indicating the cell not supporting the access to the non-continuous frequency domain resource;

[0380] and the influence of the factor 3 on the arrangement sequence is:

[0381] the CBRA preamble for indicating the uplink coverage enhancement is arranged after the CBRA preamble not supporting the uplink coverage enhancement.

[0382] At this time, the RA preamble sequence for indicating the cell not supporting the access to the non-continuous frequency domain resource, the RA preamble sequence for indicating the cell supporting the access to the non-continuous frequency domain resource, the RA preamble sequence for indicating the cell not supporting the uplink coverage enhancement, and the RA preamble sequence for indicating the cell supporting the uplink coverage enhancement are as shown in Figure 19 .

[0383] b) For the case of first considering the factor 3 and then considering the factor 1, the embodiment of the present application only gives the following one arrangement sequence, and other arrangement sequences can be known by analogy, and will not be described here.

[0384] ① The first arrangement sequence:

[0385] When the influence of the factor 3 on the arrangement sequence is:

[0386] the CBRA preamble for indicating the uplink coverage enhancement is arranged after the CBRA preamble not supporting the uplink coverage enhancement;

[0387] The influence of factor 1 on the arrangement order is:

[0388] The CBRA preamble for indicating the cell supporting the access to the non-continuous frequency domain resource is arranged after the CBRA preamble for indicating the cell not supporting the access to the non-continuous frequency domain resource;

[0389] At this time, the RA preamble sequence for indicating the non-support of the uplink coverage enhancement, the RA preamble sequence for indicating the support of the uplink coverage enhancement, the RA preamble sequence for indicating the cell not supporting the access to the non-continuous frequency domain resource, and the RA preamble sequence for indicating the cell supporting the access to the non-continuous frequency domain resource are sequentially arranged, as shown in Figure 20

[0390] Next, whether the ROs used in the 2-step type random access and the 4-step type random access are shared (or shared) is further described,

[0391] (1) The 2-step type random access and the 4-step type random access use different ROs

[0392] When the 4-step contention-based random access is performed, the sequences of each type included in the CBRA preamble sequence belong to the CBRA preamble sequence of the 4-step type random access.

[0393] At this time, the arrangement order between the sequences of each type included in the CBRA preamble sequence is consistent with the above, and details are not repeated.

[0394] Similarly, when the 2-step contention-based random access is performed, the sequences of each type included in the CBRA preamble sequence belong to the CBRA preamble sequence of the 2-step type random access.

[0395] At this time, the arrangement order between the sequences of each type included in the CBRA preamble sequence is consistent with the above, and details are not repeated.

[0396] (2) The 2-step type random access and the 4-step type random access share (or share) RO

[0397] Based on the above reasons, in the case of sharing the RO, the embodiments of the present application need to jointly consider the influence of factors 1, 2 and 3 on the arrangement sequence.

[0398] Similarly, the embodiments of the present application can consider factors 1, 2 and 3 based on the priority criterion.

[0399] ​The following embodiments of the present application only give a case of considering factor 2 first, factor 3 second and factor 1 last, and the arrangement order under other priority rules can be known by analogy, which will not be described here.

[0400] ① The first arrangement order:

[0401] When the influence of factor 2 on the arrangement order is:

[0402] The position of the CBRA preamble sequence of the 4-step type random access is before the CBRA preamble sequence of the 2-step type random access;

[0403] The influence of factor 3 on the arrangement order is:

[0404] The CBRA preamble for indicating support of uplink coverage enhancement is after the CBRA preamble for indicating no support of uplink coverage enhancement

[0405] The influence of factor 1 on the arrangement order is:

[0406] The CBRA preamble for indicating support of access to non-contiguous frequency domain resources of a cell is after the CBRA preamble for indicating no support of access to non-contiguous frequency domain resources of a cell.

[0407] At this time, the RA preamble sequence for indicating no support of uplink coverage enhancement, the RA preamble sequence for indicating support of uplink coverage enhancement, the RA preamble sequence for indicating no support of access to non-contiguous frequency domain resources of a cell and the RA preamble sequence for indicating support of access to non-contiguous frequency domain resources of a cell are sequentially arranged, as shown in Figure 21 .

[0408] As described above, in the "case three", the following arrangement order can exist:

[0409] If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access and the RO of the 2-step type random access are not shared, the position of the sequence to which the first random access preamble belongs is after or before the sequence position of the sixth random access preamble; the sixth random access preamble is the random access preamble for indicating support of uplink coverage enhancement of the 4-step type random access;

[0410] If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the ROs for the 2-step random access type, and the ROs for the 2-step type random access and the ROs for the 4-step type random access are not shared, the position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the seventh random access preamble is located; the seventh random access preamble is a random access preamble for indicating the 2-step type random access of the terminal supporting uplink coverage enhancement;

[0411] If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the ROs shared by the 2-step type random access and the 4-step type random access, the position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the sixth random access preamble belongs and the position of the sequence to which the seventh random access preamble belongs.

[0412] In summary, in "Part II", the arrangement order between the various types of RA preamble sequences contained in the cell of the non-continuous frequency domain resource is described. In order to indicate whether the terminal has the capability of supporting the access to the cell of the non-continuous frequency domain resource (i.e. the access capability), the terminal can select the first random access preamble of the embodiment of the present application from the RA preamble index, from the RA preamble sequence supporting the uplink coverage enhancement and / or the cell supporting the access to the non-continuous frequency domain resource, so as to realize the indication of the access capability (of the non-continuous frequency domain resource cell) of the terminal through the random access preamble in the random access process, so as to inform the network device.

[0413] The above mainly introduces the scheme of the embodiment of the present application from the method side. It can be understood that the terminal or the network device contains the hardware structure and / or software module corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should easily realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be realized in the form of hardware or the combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical scheme. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0414] The embodiments of the present application can divide the functional units of the terminal or the network device according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be realized in the form of hardware or in the form of a software program module. It should be noted that the division of the units in the embodiments of the present application is illustrative, and is only a logical function division, and another division mode can be used in actual implementation.

[0415] In the case of using the integrated unit, Figure 22 A functional unit composition block diagram of the access capability indication apparatus is provided. The access capability indication apparatus 2200 includes a processing unit 2202 and a communication unit 803. The processing unit 2202 is configured to control and manage the actions of the access capability indication apparatus 2200. For example, the processing unit 2202 is configured to support the access capability indication apparatus 2200 to perform the steps performed by the terminal in the method examples and other processes of the technical solutions described in the present application. The communication unit 2203 is configured to support the communication between the access capability indication apparatus 2200 and other devices in the wireless communication system. The access capability indication apparatus 2200 can further include a storage unit 2201 configured to store the program code executed by the access capability indication apparatus 2200 and the transmitted data. Figure 4

[0416] It should be noted that the access capability indication apparatus 2200 can be a chip or a chip module.

[0417] The processing unit 2202 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can realize or execute the various exemplary logical blocks, modules and circuits described in combination with the disclosure of the present application. The processing unit 2202 can also be a combination of computing functions, such as one or more microprocessor combinations, combinations of DSP and microprocessor, etc. The communication unit 2203 can be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 2201 can be a memory. When the processing unit 2202 is a processor, the communication unit 2203 is a communication interface, and the storage unit 801 is a memory, the access capability indication apparatus 2200 of the embodiments of the present application can be a chip.​Figure 24 the terminal.

[0418] In a possible implementation, the processing unit 2202 is configured to perform any of the steps performed by the terminal in the above method embodiments, and when performing data transmission such as sending, the communication unit 2203 can be selectively invoked to complete the corresponding operation. Details are as follows.

[0419] The processing unit 2202 is configured to: obtain a first physical random access channel opportunity RO; and indicate, in a random access procedure, that the terminal has the capability of accessing a cell supporting non-contiguous frequency domain resources according to the first RO or a first random access preamble carried by the first RO.

[0420] It should be noted that, Figure 22 The specific implementation of each operation in the above embodiments can be further understood from the description of the above method embodiments, which will not be repeated here. Figure 4

[0421] Specifically, the first RO and / or the first random access preamble are associated with a synchronization signal block SSB or a channel state information reference signal CSI-RS selected by the terminal through channel measurement.

[0422] Specifically, the first RO belongs to one of the following: an RO of 4-step type random access, an RO of 2-step type random access, an RO specially configured for the terminal by a high-layer parameter, and an RO shared by the 4-step type random access and the 2-step type random access.

[0423] Specifically, if the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access is not shared with the RO of the 2-step type random access, then

[0424] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the second random access preamble belongs.

[0425] The second random access preamble is a random access preamble of the 4-step type random access for indicating a cell not supporting access to non-contiguous frequency domain resources.

[0426] Specifically, if the first RO belongs to the RO of the 2-step type random access, and the RO of the 2-step type random access is not shared with the RO of the 4-step type random access, then

[0427] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the third random access preamble belongs.

[0428] The third random access preamble is a random access preamble of the 2-step type random access for indicating a cell not supporting access to non-contiguous frequency domain resources.

[0429] ​Specifically, if the first RO belongs to the RO shared by the 4-step type random access and the 2-step type random access, the position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the second random access preamble belongs and the position of the sequence to which the third random access preamble belongs;

[0430] The second random access preamble is a random access preamble used for indicating the 4-step type random access of the cell which does not support accessing the non-continuous frequency domain resource;

[0431] The third random access preamble is a random access preamble used for indicating the 2-step type random access of the cell which does not support accessing the non-continuous frequency domain resource.

[0432] Specifically, if the first random access preamble is also used for indicating that the terminal has the capability of supporting the uplink coverage enhancement, and the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access is not shared by the RO of the 2-step type random access, then

[0433] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the fourth random access preamble belongs;

[0434] The fourth random access preamble is a random access preamble used for indicating the 4-step type random access of the cell which does not support the uplink coverage enhancement and supports accessing the non-continuous frequency domain resource.

[0435] Specifically, if the first random access preamble is also used for indicating that the terminal has the capability of supporting the uplink coverage enhancement, and the first RO belongs to the RO of the 2-step type random access, and the RO of the 2-step type random access is not shared by the RO of the 4-step type random access, then

[0436] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the fifth random access preamble belongs;

[0437] The fifth random access preamble is a random access preamble used for indicating the 2-step type random access of the cell which does not support accessing the non-continuous frequency domain resource and does not support the uplink coverage enhancement.

[0438] Specifically, if the first RO belongs to the RO shared by the 4-step type random access and the 2-step type random access, then

[0439] The position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the fourth random access preamble belongs and the position of the sequence to which the fifth random access preamble belongs;

[0440] The fourth random access preamble is a random access preamble used for indicating the 4-step type random access of the cell which does not support the uplink coverage enhancement and does not support accessing the non-continuous frequency domain resource.

[0441] The fifth random access preamble is a random access preamble used for indicating a 2-step type random access of a cell which does not support uplink coverage enhancement and does not support access to non-contiguous frequency domain resources.

[0442] Specifically, if the capability of the terminal to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a 4-step type random access RO, and the 4-step type random access RO is not shared with a 2-step type random access RO, then

[0443] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the sixth random access preamble is located.

[0444] The sixth random access preamble is a random access preamble used for indicating a 4-step type random access of a cell which supports uplink coverage enhancement.

[0445] Specifically, if the capability of the device to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a 2-step type random access RO, and the 2-step type random access RO is not shared with a 4-step type random access RO, then

[0446] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the seventh random access preamble is located.

[0447] The seventh random access preamble is a random access preamble used for indicating a 2-step type random access of a cell which supports uplink coverage enhancement.

[0448] Specifically, if the capability of the terminal to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a 4-step type random access RO and a 2-step type random access RO, then

[0449] The position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the sixth random access preamble belongs and the position of the sequence to which the seventh random access preamble belongs.

[0450] The sixth random access preamble is a random access preamble used for indicating a 4-step type random access of a cell which supports uplink coverage enhancement.

[0451] The seventh random access preamble is a random access preamble used for indicating a 2-step type random access of a cell which supports uplink coverage enhancement.

[0452] In the case of using an integrated unit, Figure 23A functional unit composition diagram of still another access capability indication apparatus is provided. The access capability indication apparatus 2300 includes a processing unit 2302 and a communication unit 2303. The processing unit 2302 is configured to control and manage actions of the access capability indication apparatus 2300, for example, the processing unit 2302 is configured to support the access capability indication apparatus 2300 to perform steps performed by the network device in the method embodiments shown in the above Figure 4 and other processes used for the technical solutions described in the present application. The communication unit 2303 is configured to support communication between the access capability indication apparatus 2300 and other devices in the wireless communication system. The access capability indication apparatus 2300 can further include a storage unit 2301 configured to store program codes executed by the access capability indication apparatus 2300 and data transmitted.

[0453] It should be noted that the access capability indication apparatus 2300 can be a chip or a chip module.

[0454] The processing unit 2302 can be a processor or a controller, for example, can be a CPU, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logical blocks, modules, and circuits described in combination with the disclosure of the present application. The processing unit 2302 can also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 2303 can be a communication interface, a transceiver, a transceiver circuit, and the like, and the storage unit 2301 can be a memory. When the processing unit 2302 is a processor, the communication unit 2303 is a communication interface, and the storage unit 2301 is a memory, the access capability indication apparatus 2300 of the embodiments of the present application can be the network device shown in FIG. 25.

[0455] In a specific implementation, the processing unit 2302 is configured to perform any step performed by the network device in the above method embodiments, and when performing data transmission such as sending, the communication unit 2303 can be optionally called to complete the corresponding operation. The following will be described in detail.

[0456] The processing unit 2302 is configured to acquire a first physical random access channel opportunity RO or a first random access preamble carried by the first RO in a random access procedure, and the first RO or the first random access preamble is used to indicate that the terminal has the capability to support a cell with non-contiguous frequency domain resources.

[0457] It should be noted that, Figure 23 The specific implementation of each operation in the embodiments can be found in the description of the method embodiments shown in the above Figure 4 The specific implementation of each operation in the embodiments can be found in the description of the method embodiments shown in the above

[0458] Specifically, the first RO and / or the first random access preamble are associated with a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) selected by the terminal from channel measurement.

[0459] Specifically, the first RO is one of a RO of a 4-step type random access, a RO of a 2-step type random access, a RO specially configured for the terminal by a high layer parameter, and a RO shared by the 4-step type random access and the 2-step type random access.

[0460] Specifically, if the first RO is a RO of a 4-step type random access, and the RO of the 4-step type random access is not shared with a RO of a 2-step type random access, then

[0461] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the second random access preamble belongs.

[0462] The second random access preamble is a random access preamble for 4-step type random access indicating a cell not supporting access to non-contiguous frequency domain resources.

[0463] Specifically, if the first RO is a RO of a 2-step type random access, and the RO of the 2-step type random access is not shared with a RO of a 4-step type random access, then

[0464] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the third random access preamble belongs.

[0465] The third random access preamble is a random access preamble for 2-step type random access indicating a cell not supporting access to non-contiguous frequency domain resources.

[0466] Specifically, if the first RO is a RO shared by the 4-step type random access and the 2-step type random access, then

[0467] The position of the sequence to which the first random access preamble belongs is before, after, or between the position of the sequence to which the second random access preamble belongs and the position of the sequence to which the third random access preamble belongs.

[0468] The second random access preamble is a random access preamble for 4-step type random access indicating a cell not supporting access to non-contiguous frequency domain resources.

[0469] The third random access preamble is a random access preamble for 2-step type random access indicating a cell not supporting access to non-contiguous frequency domain resources.

[0470] Specifically, if the first random access preamble is also used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access and the RO of the 2-step type random access are not shared, then

[0471] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the fourth random access preamble is located.

[0472] The fourth random access preamble is a random access preamble used to simultaneously indicate a cell supporting access to non-contiguous frequency domain resources and 4-step type random access without supporting uplink coverage enhancement.

[0473] Specifically, if the first random access preamble is also used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO of the 2-step type random access, and the RO of the 2-step type random access and the RO of the 4-step type random access are not shared, then

[0474] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the fifth random access preamble is located.

[0475] The fifth random access preamble is a random access preamble used to simultaneously indicate a cell not supporting access to non-contiguous frequency domain resources and 2-step type random access without supporting uplink coverage enhancement.

[0476] Specifically, if the first RO belongs to the RO shared by the 4-step type random access and the 2-step type random access, then

[0477] The position of the sequence to which the first random access preamble belongs is before, after, or between the position of the sequence to which the fourth random access preamble belongs and the position of the sequence to which the fifth random access preamble belongs.

[0478] The fourth random access preamble is a random access preamble used to simultaneously indicate 4-step type random access without supporting uplink coverage enhancement and a cell not supporting access to non-contiguous frequency domain resources.

[0479] The fifth random access preamble is a random access preamble used to simultaneously indicate 2-step type random access without supporting uplink coverage enhancement and a cell not supporting access to non-contiguous frequency domain resources.

[0480] Specifically, if the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the RO of the 4-step type random access, and the RO of the 4-step type random access and the RO of the 2-step type random access are not shared, then

[0481] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the sixth random access preamble is located.

[0482] The sixth random access preamble is a random access preamble used for indicating a 4-step type random access supporting uplink coverage enhancement.

[0483] Specifically, if the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the ROs for the 2-step random access type, and the ROs for the 2-step type random access and the ROs for the 4-step type random access are not shared, then

[0484] The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the seventh random access preamble is located;

[0485] The seventh random access preamble is a random access preamble used for indicating a 2-step type random access supporting uplink coverage enhancement.

[0486] Specifically, if the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the ROs shared by the 4-step type random access and the 2-step type random access, then

[0487] The position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the sixth random access preamble belongs and the position of the sequence to which the seventh random access preamble belongs;

[0488] The sixth random access preamble is a random access preamble used for indicating a 4-step type random access supporting uplink coverage enhancement;

[0489] The seventh random access preamble is a random access preamble used for indicating a 2-step type random access supporting uplink coverage enhancement.

[0490] Please refer to Figure 24 , Figure 24 is a structural schematic diagram of a terminal according to an embodiment of the present application. The terminal 2400 includes a processor 2410, a memory 2420, and a communication bus for connecting the processor 2410 and the memory 2420.

[0491] The memory 2420 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 2420 is used to store program codes executed by the terminal 2400 and transmitted data.

[0492] The terminal 2400 further includes a communication interface for receiving and sending data.

[0493] The processor 2410 can be one or more CPUs, and in the case where the processor 2410 is one CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0494] The processor 2410 in the terminal 2400 is configured to execute computer programs or instructions 2421 stored in the memory 2420 to perform the following operations: obtaining a first physical random access channel opportunity RO; and indicating, in a random access procedure, that a terminal has a capability of supporting a cell with non-contiguous frequency domain resources according to the first RO or a first random access preamble carried by the first RO.

[0495] It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiments described above. Figure 4 The terminal 2400 can be configured to perform the terminal-side method of the method embodiments described above, and details are not described herein again.

[0496] Please refer to Figure 25 , Figure 25 is a structural schematic diagram of a network device according to an embodiment of the present application. The network device 2500 includes a processor 2510, a memory 2520, and a communication bus for connecting the processor 2510 and the memory 2520.

[0497] The memory 2520 includes, but is not limited to, RAM, ROM, EPROM, or CD-ROM, and the memory 2520 is configured to store relevant instructions and data.

[0498] The network device 2500 further includes a communication interface for receiving and sending data.

[0499] The processor 2510 can be one or more CPUs, and in the case where the processor 2510 is one CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0500] The processor 2510 in the network device 2500 is configured to execute computer programs or instructions 2521 stored in the memory 2520 to perform the following operations: obtaining, in a random access procedure, a first physical random access channel opportunity RO or a first random access preamble carried by the first RO, and the first RO or the first random access preamble is used to indicate that a terminal has a capability of supporting a cell with non-contiguous frequency domain resources.

[0501] It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiments described above. Figure 4According to the corresponding description of the method embodiments, the network device 2500 can be used to perform the network device side method of the method embodiments described above, and details are not described herein.

[0502] The embodiments of the present application further provide a computer readable storage medium, wherein the computer readable storage medium stores a computer program or instructions, and the computer program or instructions are executed by a processor to implement the steps described above.

[0503] The embodiments of the present application further provide a computer program product, comprising a computer program or instructions, wherein the computer program or instructions are executed by a processor to implement the steps described above. The computer program product can be a software installation package.

[0504] It should be noted that, for the above-mentioned various embodiments, in order to simply describe, they are all expressed as a series of action combinations. Those skilled in the art should know that the present application is not limited to the order of the actions described, because some steps in the embodiments of the present application can be performed in other order or simultaneously. In addition, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions, steps, modules or units involved are not necessarily required in the embodiments of the present application.

[0505] In the above embodiments, the description of each embodiment of the present application has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0506] Those skilled in the art should know that the functions of the methods, steps or related modules / units described in the embodiments of the present application can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product or by a manner of executing computer program instructions by a processor. The computer program product includes at least one computer program instruction, which can be composed of a software module, and the software module can be stored in a RAM, a flash memory, a ROM, an EPROM, an EEPROM, a register, a hard disk, a mobile hard disk, a CD-ROM (Compact Disc-Read Only Memory) or any other form of storage medium well known in the art. The computer program instruction can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another. For example, the computer program instruction can be transferred from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium, or a semiconductor medium (e.g., SSD) etc.

[0507] Each module / unit contained in each device or product described in the above embodiments can be a software module / unit, a hardware module / unit, or a part of software module / unit and another part of hardware module / unit. For example, for each device or product applied to or integrated in a chip, each module / unit contained therein can be implemented in the form of hardware such as circuitry; or a part of the modules / units contained therein can be implemented in the form of software program running on a processor integrated in the chip, and another part (if any) of the modules / units can be implemented in the form of hardware such as circuitry. The same applies to each device or product applied to or integrated in a chip module, or applied to or integrated in a terminal.

[0508] The above detailed description further illustrates the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above description is only a specific implementation of the embodiments of the present application and is not intended to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. An access capability indication method, characterized by, Comprising: a terminal acquires a first physical random access channel opportunity RO; the terminal indicates the terminal has a capability of supporting a cell accessing non-contiguous frequency domain resources according to the first RO or a first random access preamble carried by the first RO in a random access procedure.

2. The method of claim 1, wherein, the first RO and / or the first random access preamble is associated with a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) selected by the terminal from channel measurement.

3. The method of claim 1, wherein, the first RO is one of a 4-step type random access RO, a 2-step type random access RO, a RO specially configured for the terminal by a high layer parameter, a RO shared by 4-step type random access and 2-step type random access.

4. The method according to any one of claims 1 to 3, characterized in that, if the first RO is a 4-step type random access RO and the 4-step type random access RO is not shared with a 2-step type random access RO, a position of a sequence to which the first random access preamble belongs is after or before a position of a sequence to which a second random access preamble belongs; the second random access preamble is a random access preamble for 4-step type random access indicating a cell not supporting accessing non-contiguous frequency domain resources.

5. The method according to any one of claims 1 to 3, characterized in that, if the first RO is a 2-step type random access RO and the 2-step type random access RO is not shared with a 4-step type random access RO, a position of a sequence to which the first random access preamble belongs is after or before a position of a sequence to which a third random access preamble belongs; the third random access preamble is a random access preamble for 2-step type random access indicating a cell not supporting accessing non-contiguous frequency domain resources.

6. The method according to any one of claims 1 to 3, characterized in that, if the first RO is a RO shared by 4-step type random access and 2-step type random access, a position of a sequence to which the first random access preamble belongs is before, after or between a position of a sequence to which a second random access preamble belongs and a position of a sequence to which a third random access preamble belongs; the second random access preamble is a random access preamble for 4-step type random access indicating a cell not supporting accessing non-contiguous frequency domain resources; the third random access preamble is a random access preamble for 2-step type random access indicating a cell not supporting accessing non-contiguous frequency domain resources.

7. The method according to any one of claims 1 to 3, characterized in that, if the first random access preamble is also used to indicate the terminal has a capability of supporting uplink coverage enhancement and the first RO is a 4-step type random access RO and the 4-step type random access RO is not shared with a 2-step type random access RO, a position of a sequence to which the first random access preamble belongs is after or before a position of a sequence to which a fourth random access preamble belongs; the fourth random access preamble is a random access preamble for 4-step type random access indicating a cell supporting accessing non-contiguous frequency domain resources and not supporting uplink coverage enhancement.

8. The method according to any one of claims 1 to 3, characterized in that, if the first random access preamble is also used to indicate the terminal has a capability of supporting uplink coverage enhancement and the first RO is a 2-step type random access RO and the 2-step type random access RO is not shared with a 4-step type random access RO, The sequence position of the first random access preamble is after or before the sequence position of the fifth random access preamble; The fifth random access preamble is a random access preamble used for indicating 2-step type random access which does not support uplink coverage enhancement and does not support accessing a cell of non-continuous frequency domain resource.

9. The method according to any one of claims 1 to 3, characterized in that, If the first RO belongs to the RO shared by 4-step type random access and 2-step type random access, and the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, The sequence position of the first random access preamble is before, after or between the sequence position of the fourth random access preamble and the sequence position of the fifth random access preamble; The fourth random access preamble is a random access preamble used for indicating 4-step type random access which does not support uplink coverage enhancement and does not support accessing a cell of non-continuous frequency domain resource; The fifth random access preamble is a random access preamble used for indicating 2-step type random access which does not support uplink coverage enhancement and does not support accessing a cell of non-continuous frequency domain resource.

10. The method according to any one of claims 1 to 3, characterized in that, If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the RO of 4-step type random access, and the RO of 4-step type random access is not shared by the RO of 2-step type random access, The sequence position of the first random access preamble is after or before the sequence position of the sixth random access preamble; The sixth random access preamble is a random access preamble used for indicating 4-step type random access which supports uplink coverage enhancement.

11. The method according to any one of claims 1 to 3, characterized in that, If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the RO of 2-step type random access, and the RO of 2-step type random access is not shared by the RO of 4-step type random access, The sequence position of the first random access preamble is after or before the sequence position of the seventh random access preamble; The seventh random access preamble is a random access preamble used for indicating 2-step type random access which supports uplink coverage enhancement.

12. The method according to any one of claims 1 to 3, characterized in that, If the capability of the terminal supporting uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to the RO shared by 4-step type random access and 2-step type random access, The sequence position of the first random access preamble is before, after or between the sequence position of the sixth random access preamble and the sequence position of the seventh random access preamble; The sixth random access preamble is a random access preamble used for indicating 4-step type random access which supports uplink coverage enhancement; The seventh random access preamble is a random access preamble used for indicating 2-step type random access which supports uplink coverage enhancement.

13. An access capability indication method, comprising: Comprising: A network device acquires a first physical random access channel opportunity (RO) or a first random access preamble carried by the first RO in a random access process, the first RO or the first random access preamble is used for indicating that a terminal has a capability of supporting a cell of non-continuous frequency domain resource.

14. The method of claim 13, wherein, The first RO and / or the first random access preamble are associated with a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) selected by the terminal through channel measurement.

15. The method of claim 13, wherein, The first RO is one of a 4-step type random access RO, a 2-step type random access RO, a RO specially configured for the terminal by a high-level parameter, a RO shared by 4-step type random access and 2-step type random access.

16. The method according to any one of claims 13-15, characterized in that, If the first RO is a 4-step type random access RO, and the 4-step type random access RO is not shared with a 2-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the second random access preamble belongs. The second random access preamble is a 4-step type random access preamble used to indicate a cell that does not support access to non-contiguous frequency domain resources.

17. The method according to any one of claims 13-15, characterized in that, If the first RO is a 2-step type random access RO, and the 2-step type random access RO is not shared with a 4-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the third random access preamble belongs. The third random access preamble is a 2-step type random access preamble used to indicate a cell that does not support access to non-contiguous frequency domain resources.

18. The method according to any one of claims 13-15, characterized by, If the first RO is a RO shared by 4-step type random access and 2-step type random access, then The position of the sequence to which the first random access preamble belongs is before, after, or between the position of the sequence to which the second random access preamble belongs and the position of the sequence to which the third random access preamble belongs. The second random access preamble is a 4-step type random access preamble used to indicate a cell that does not support access to non-contiguous frequency domain resources. The third random access preamble is a 2-step type random access preamble used to indicate a cell that does not support access to non-contiguous frequency domain resources.

19. The method according to any one of claims 13-15, characterized in that, If the first random access preamble is also used to indicate that the terminal has a capability of supporting uplink coverage enhancement, and the first RO is a 4-step type random access RO, and the 4-step type random access RO is not shared with a 2-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the fourth random access preamble belongs. The fourth random access preamble is a 4-step type random access preamble used to indicate a cell that supports access to non-contiguous frequency domain resources and does not support uplink coverage enhancement.

20. The method according to any one of claims 13-15, characterized in that, If the first random access preamble is also used to indicate that the terminal has a capability of supporting uplink coverage enhancement, and the first RO is a 2-step type random access RO, and the 2-step type random access RO is not shared with a 4-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence to which the fifth random access preamble belongs. The fifth random access preamble is a 2-step type random access preamble used to indicate a cell that does not support access to non-contiguous frequency domain resources and does not support uplink coverage enhancement.

21. The method according to any one of claims 13-15, characterized in that, If the first RO belongs to a RO shared by the 4-step type random access and the 2-step type random access, and The position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the fourth random access preamble belongs and the position of the sequence to which the fifth random access preamble belongs; The fourth random access preamble is a random access preamble used for 4-step type random access of a cell which does not support uplink coverage enhancement and does not support access to non-continuous frequency domain resources; The fifth random access preamble is a random access preamble used for 2-step type random access of a cell which does not support uplink coverage enhancement and does not support access to non-continuous frequency domain resources.

22. The method according to any one of claims 13-15, characterized in that, If the capability of the terminal to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a 4-step type random access RO, and the 4-step type random access RO is not shared by a 2-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the sixth random access preamble is located; The sixth random access preamble is a random access preamble used for 4-step type random access of a cell which supports uplink coverage enhancement.

23. The method according to any one of claims 13-15, characterized in that, If the capability of the terminal to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a 2-step type random access RO, and the 2-step type random access RO is not shared by a 4-step type random access RO, then The position of the sequence to which the first random access preamble belongs is after or before the position of the sequence in which the seventh random access preamble is located; The seventh random access preamble is a random access preamble used for 2-step type random access of a cell which supports uplink coverage enhancement.

24. The method according to any one of claims 13-15, characterized by, If the capability of the terminal to support uplink coverage enhancement is not indicated by the first random access preamble, and the first RO belongs to a RO shared by the 4-step type random access and the 2-step type random access, then The position of the sequence to which the first random access preamble belongs is before, after or between the position of the sequence to which the sixth random access preamble belongs and the position of the sequence to which the seventh random access preamble belongs; The sixth random access preamble is a random access preamble used for 4-step type random access of a cell which supports uplink coverage enhancement; The seventh random access preamble is a random access preamble used for 2-step type random access of a cell which supports uplink coverage enhancement.

25. An access capability indication apparatus, comprising: The apparatus comprises a processing unit and a communication unit, and the processing unit is configured to: acquire, through the communication unit, a first physical random access channel opportunity (RO); indicate, according to the first RO or a first random access preamble carried by the first RO, that the apparatus has the capability of accessing a cell of non-continuous frequency domain resources during a random access process.

26. An access capability indication apparatus, comprising: The apparatus comprises a processing unit and a communication unit, and the processing unit is configured to: acquiring, by the communication unit, a first physical random access channel opportunity (RO) or a first random access preamble carried by the first RO, the first RO or the first random access preamble being used to indicate that the terminal has a capability of supporting a cell with non-contiguous frequency domain resources.

27. A terminal comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 1-12.

28. A network device comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 13-24.

29. A computer-readable storage medium, characterized in that, The computer program or instructions, when executed by the processor, implement the steps of the method of any one of claims 1-24.

30. A chip comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 1-12 or 13-24.

31. A chip module comprising a transceiver assembly and a chip, the chip comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 1-12 or 13-24.

32. A computer program product comprising computer programs or instructions, wherein, The computer program or instructions, when executed by the processor, implement the steps of the method of any one of claims 1-12 or 13-24. The computer program or instructions, when executed by the processor, implement the steps of the method of any one of claims 1-12 or 13-24.

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