CN115884162A

CN115884162A - Access capability indication method and device, terminal and network equipment

Info

Publication number: CN115884162A
Application number: CN202111139737.8A
Authority: CN
Inventors: 周欢
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-03-31

Abstract

The application discloses an access capability indication method and device, a terminal and network equipment; 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 to the cell of the discontinuous frequency domain resource according to the first RO or a first random access preamble carried by the first RO in the process of random access; the network device acquires the first RO or a first random access preamble carried by the first RO in the random access process, wherein the first RO or the first random access preamble is used for indicating that the terminal has the capability of the cell supporting the discontinuous frequency domain resources, so that the access capability (of the discontinuous frequency domain resource cell) of the terminal is indicated through the RO or the random access preamble in the random access process so as to be informed to the network device.

Description

Access capability indication method and device, terminal and network equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an access capability indication method and apparatus, a terminal, and a network device.

Background

The standard protocol established by the third generation partnership project (3 rd generation partnership project,3 gpp) has been studied with respect to the configuration of frequency domain resources for a cell. The frequency domain resources of the cells configured by the network are all continuous Resource Blocks (RBs).

With the continuous evolution of the standard protocol established by 3GPP and the continuous complexity of the communication scenario, there may be discontinuous frequency domain resources in the cell. Since there may be a difference in access capabilities between different terminals, some terminals may support cells accessing non-contiguous frequency domain resources, while other terminals may not support cells accessing non-contiguous frequency domain resources. When a terminal supporting the discontinuous frequency domain resources and a terminal not supporting the discontinuous frequency domain resources both need to access to a cell, further research is needed on how a network device can identify whether the terminal supports or does not support.

Disclosure of Invention

The application provides an access capability indication method and device, a terminal and a network device, so that the indication of the access capability (of a discontinuous frequency domain resource cell) of the terminal is expected to be realized through an RO or a random access preamble in a random access process so as to inform the network device.

In a first aspect, a method for indicating access capability in the present application includes:

a terminal acquires a first physical random access channel opportunity (RO);

the terminal indicates that the terminal has the capability of supporting the cell accessing discontinuous frequency domain resources according to the first RO or a first random access preamble carried by the first RO in the process of random access.

It can be seen that, in order to implement the indication of whether a terminal has a capability of supporting accessing a cell of a discontinuous frequency domain resource (i.e. an access capability), under a cell of a terminal supporting accessing the discontinuous frequency domain resource, the terminal may obtain a first RO, and indicate that the terminal has the capability of supporting accessing the cell of the discontinuous frequency domain resource (or indicate that the terminal supports accessing the cell of the discontinuous frequency domain resource) according to the first RO or a first random access preamble carried by the first RO in a random access process, so that the access capability (of the cell of the discontinuous frequency domain resource) of the terminal is indicated by the RO or the random access preamble in the random access process so as to be notified to a network device.

In a second aspect, a method for indicating access capability of the present application includes:

the method comprises the steps that a network device obtains a first physical random access channel (RO) or a first random access preamble carried by the first RO in the process of random access, wherein the first RO or the first random access preamble is used for indicating that a terminal has the capability of supporting a cell of discontinuous frequency domain resources.

It can be seen that, in order to ensure that the network device can know the access capability (of the discontinuous frequency domain resource cell) of the terminal, the network device may obtain the first RO or the first random access preamble carried by the first RO during the random access, so as to implement the possibility of knowing the access capability (of the discontinuous frequency domain resource cell) of the terminal by the indication of the RO or the indication of the random access preamble during the random access.

In a third aspect, an access capability indicating device in the present application includes a processing unit and a communication unit, where the processing unit is configured to:

acquiring, by the communication unit, a first physical random access channel opportunity (RO);

indicating that the apparatus has a capability of supporting access to a cell of non-contiguous frequency domain resources according to the first RO or a first random access preamble carried by the first RO in performing a random access procedure.

In a fourth aspect, the present application is an access capability indicating apparatus, where the apparatus includes a processing unit and a communication unit, where the processing unit is configured to:

acquiring, by the communication unit, a first physical random access channel (RO) opportunity or a first random access preamble carried by the first RO in a random access process, where the first RO or the first random access preamble is used to indicate that a terminal has a capability of supporting a cell of discontinuous frequency domain resources.

A fifth aspect is a terminal of the present application, 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 described in the first aspect.

A sixth aspect is a network device of the present application, 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 described in the second aspect.

A seventh aspect is a computer-readable storage medium of the present application, wherein the computer-readable storage medium stores a computer program or instructions, and the computer program or instructions, when executed by a processor, implement the steps described in the first or second aspect.

An eighth aspect is a computer program product of the present application, comprising computer programs or instructions, wherein the computer programs or instructions, when executed by a processor, implement the steps described in the first or second aspect above. Illustratively, the computer program product may be a software installation package.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below.

Fig. 1 is an architecture diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a contention-based 4-step random access according to an embodiment of the present application;

fig. 3 is a schematic flowchart of 2-step contention-based random access according to an embodiment of the present application;

fig. 4 is a flowchart illustrating an access capability indication method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a discontinuous frequency domain resource in a cell according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a discontinuous frequency domain resource in a cell according to another embodiment of the present application;

fig. 7 is a schematic structural diagram of a discontinuous frequency domain resource in a cell according to yet another embodiment of the present application;

FIG. 8 is a schematic structural diagram illustrating an arrangement order among various RA preamble sequences according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an arrangement sequence between CBRA preamble sequences of 4-step type random access and 2-step type random access in the embodiment of the present application;

fig. 10 is a structural diagram illustrating an arrangement order between a sequence to which a first random access preamble belongs and a sequence to which a second random access preamble belongs according to an embodiment of the present application;

fig. 11 is a schematic structural diagram illustrating an arrangement order between a sequence to which a first random access preamble belongs and a sequence to which a third random access preamble belongs according to an embodiment of the present application;

fig. 12 to fig. 15 are schematic structural diagrams illustrating an arrangement sequence among a sequence to which a first random access preamble belongs, a sequence to which a second random access preamble belongs, and a sequence to which a third random access preamble belongs according to an embodiment of the present application;

fig. 16 to fig. 21 are schematic structural diagrams illustrating an arrangement sequence between various RA preamble sequences in a CBRA preamble sequence according to an embodiment of the present application;

fig. 22 is a block diagram illustrating functional units of an access capability indicating apparatus according to an embodiment of the present disclosure;

fig. 23 is a block diagram of functional units of another access capability indicating apparatus according to an embodiment of the present application;

fig. 24 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 25 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solutions of the present application for those skilled in the art, the technical solutions in the embodiments of the present application are described below with reference to the drawings in the embodiments of the present application. It should be apparent that the embodiments described are some, but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort for the embodiments in the present application belong to the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or apparatus that comprises a list of steps or elements is not limited to those listed but may include other steps or elements not listed or inherent to such process, method, product, or apparatus.

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 various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

It should be noted that "connection" in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection, so as to implement communication between devices, and is not limited in any way. In the embodiments of the present application, the expression "network" and "system" refers to the same concept, and a communication system is a communication network.

The technical solution of the embodiment of the present application can be applied to various wireless communication systems, for example: global System for Mobile communications (GSM) System, code Division Multiple Access (CDMA) System, wideband Code Division Multiple Access (WCDMA) System, general Packet Radio Service (GPRS), long Term Evolution (Long Term Evolution, LTE) System, advanced Long Term Evolution (LTE-a) System, new Radio (NR) System, evolution System of NR System, LTE-based Access to Unlicensed Spectrum, LTE-U) System, NR-based Access to Unlicensed Spectrum (NR-U) System, non-Terrestrial communication network (NTN) System, universal Mobile Telecommunications System (UMTS), wireless Local Area Network (WLAN), wireless Fidelity (WiFi), 6th-Generation (6G) communication System, or other communication systems.

It should be noted that the conventional wireless communication system has a limited number of supported connections and is easy to implement. However, with the development of communication technology, the wireless communication system may support not only a conventional wireless communication system, but also devices to devices (D2D) communication, machine to machine (M2M) communication, machine Type Communication (MTC), vehicle to vehicle (V2V) communication, vehicle to vehicle (V2X) communication, narrowband internet of things (NB-IoT) communication, etc., so that the technical solution of the embodiments of the present application may also be applied to the above wireless communication system.

Alternatively, the wireless communication system of the embodiment of the present application may be applied to beamforming (beamforming), carrier Aggregation (CA), dual Connectivity (DC), or Standalone (SA) deployment scenarios.

Optionally, the wireless communication system of the embodiment of the present application may be applied to an unlicensed spectrum. The unlicensed spectrum may also be referred to as a shared spectrum. Alternatively, the wireless communication system in the embodiment of the present application may also be applied to licensed spectrum. The licensed spectrum may also be considered as an unshared spectrum.

The embodiments of the present application are described in conjunction with a terminal and a network device, and the terminal and the network device are specifically described below.

Specifically, the terminal may be a User Equipment (UE), a remote terminal (remote UE), a relay UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a mobile device, a user terminal, a smart terminal, a wireless communication device, a user agent, or a user equipment. It should be noted that the relay device is a terminal capable of providing a relay forwarding service for other terminals (including a remote terminal). In addition, the terminal may 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 a 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 (e.g., NR communication system, 6G communication system), or a terminal in a Public Land Mobile Network (PLMN) that is evolved in the future, and the like, which are not particularly limited.

Further, the terminal can be deployed on land, including indoors or outdoors, hand-held, worn, or vehicle-mounted; can be deployed on the water surface (such as a ship and the like); may be deployed in the air (e.g., aircraft, balloons, satellites, etc.).

Further, the terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned autonomous driving, a wireless terminal device in remote medical treatment (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like.

Specifically, the network device may be a device for communicating with the terminal, and is responsible for Radio Resource Management (RRM), quality of service (QoS) management, data compression and encryption, data transmission and reception, and the like on the air interface side. The network device may be a Base Station (BS) in a communication system or a device deployed in a Radio Access Network (RAN) for providing a wireless communication function. For example, the base station (BTS) in the GSM or CDMA communication system, the Node B (NB) in the WCDMA communication system, the evolved node B (eNB or eNodeB) in the LTE communication system, the next evolved node B (ng-eNB) in the NR communication system, the next evolved node B (gNB) in the NR communication system, the Master Node (MN) in the dual link architecture, the second node or the Secondary Node (SN) in the dual link architecture, and the like, which are not particularly limited.

Further, the network device may 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; but also may be an Access Point (AP) in a Wireless Local Area Network (WLAN), a relay station, a communication device in a PLMN network for future evolution, a communication device in an NTN network, and so on.

Further, the network device may include means, such as a system-on-chip, having a function of providing wireless communication for the terminal. For example, the chip system may include a chip and may also include other discrete devices.

Further, the network device may communicate with an Internet Protocol (IP) network. Such as the internet (internet), a private IP network, or other data network, etc.

It should be noted that in some network deployments, the network device may be a stand-alone node to implement all functions of the base station, which may include a Centralized Unit (CU) and a Distributed Unit (DU), such as a gNB-CU and a gNB-DU; an Active Antenna Unit (AAU) may also be included. The CUs may implement part of the functions of the network device, and the DUs may also implement part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, and implements functions of a Radio Resource Control (RRC) layer, a Service Data Adaptation (SDAP) layer, and a Packet Data Convergence (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. In addition, the AAU may implement portions of physical layer processing functions, radio frequency processing, and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling (e.g., RRC layer signaling) can be considered to be sent by the DU or jointly sent by the DU and the AAU in the network deployment. It is to be understood that the network device may comprise at least one of a CU, a DU, an AAU. In addition, the CU may be divided into network devices in an access network (RAN), or the CU may be divided into network devices in a core network, which is not specifically limited.

Further, the network device may have mobile characteristics, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a geosynchronous orbit (GEO) satellite, a High Elliptic Orbit (HEO) satellite, and the like. Alternatively, the network device may be a base station installed on land, water, or the like.

Further, the network device may serve a cell, and terminals within the cell may communicate with the network device via transmission resources (e.g., spectrum resources). The cell may include a macro cell (macro cell), a small cell (small cell), a metro cell (metro cell), a micro cell (micro cell), a pico cell (pico cell), a femto cell (femto cell), and the like.

In conjunction with the above description, an exemplary description is provided below of a wireless communication system according to an embodiment of the present application.

For an exemplary wireless communication system according to an embodiment of the present application, please refer to fig. 1. The wireless communication system 10 may include a network device 110 and a terminal 120, and the network device 110 may be a device that performs communication with the terminal 120. Meanwhile, the network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals 120 located within the coverage area.

Optionally, the wireless communication system 10 may further include a plurality of network devices, and each network device may include a certain number of terminals within a coverage area thereof, which is not specifically limited herein.

Optionally, the wireless communication system 10 may further include other network entities such as a network controller, a mobility management entity, etc., which are not limited in this regard.

Alternatively, the communication between the network device and the terminal in the wireless communication system 10, and the communication between the terminal and the terminal may be wireless communication or wired communication, and is not particularly limited herein.

First, the relevant contents related to the technical solutions of the embodiments of the present application are introduced to facilitate understanding for those skilled in the art.

1. 4-step type random access (4-step type random access) process based on contention-based

As shown in fig. 2, for 4-step type contention-based random access, the whole process includes 4 steps: random access preamble (RA preamble) transmission, random Access Response (RAR) message reception, message 3 (Msg 3) transmission, and message 4 (Msg 4) reception.

Step one, RA preamble transmission

The RA preamble, i.e. message 1 (Msg 1), may be used to notify the network device that there is a random access request, so that the network device may estimate the transmission delay between the network device and the terminal, calibrate the uplink timing, and indicate to the terminal through the RAR message.

Step two, RAR message reception

The RAR message, i.e. the message 2 (Msg 2), is transmitted through a resource location indicated by a PDCCH scrambled by an RA-RNTI (random access radio network temporary identifier), and a time-frequency location of a resource carrying the RA preamble determines a value of the RA-RNTI. After the terminal transmits the RA preamble, the terminal monitors a corresponding PDCCH according to the value of the RA-RNTI in an RAR time window so as to receive an RAR message scrambled by the RA-RNTI. And if the RAR message sent by the network equipment is not received in the RAR time window, the random access process is considered to fail.

The RAR message may include a time adjustment amount required for specifying uplink synchronization, uplink resources required for the terminal to transmit the message 3, a temporary C-RNTI, and the like.

In addition, since a terminal may randomly select one RA preamble for random access, there may be a case where multiple terminals simultaneously select the same PRACH (physical random access channel) resource and the same RA preamble, thereby causing a collision, that is, it is impossible to determine to which terminal the RAR message is in response to using the same RA-RNTI and RA preamble, and a collision solution mechanism is required to solve the collision problem at this time.

Step three, message 3 transmission

Msg3, i.e. message 3, is transmitted on UL-SCH (uplink shared channel), msg3 needs to contain an important message: a unique identifier for each terminal. This flag may be used for conflict resolution in step four. For a terminal in an RRC _ CONNECTED state, the only mark is C-RNTI; for terminals in the non-RRC _ CONNECTED state, a unique terminal identity (S-TMSI or a random number) from the core network will be used as its identity.

Step four, receiving the message 4

The terminal has a unique mark carrying itself at Msg 3: C-RNTI or a terminal identity from the core network. The network device will carry the unique flag in Msg4 to indicate the winning terminal in the collision resolution mechanism, and other terminals that are not winning in collision resolution will re-initiate random access. If the PDCCH received by the terminal in the Msg4 is scrambled by the TC-RNTI specified in the RAR, when the UE content Resolution Identity MAC control element contained in the MAC PDU successfully decoded matches the CCCH SDU sent by the Msg3, the terminal considers that the random access is successful and sets the TC-RNTI as the C-RNTI.

2. 2-step type random access (2-step type random access) procedure based on contention

In the R16 release, in order to reduce the terminal access delay, a 2-step type random access procedure based on contention is introduced.

As shown in fig. 3, for 2-step type contention-based random access, the whole process includes the following two steps:

step one, msgA transmission

The terminal transmits an RA preamble and the message 3 in the contention-based 4-step random access process, which is referred to as MsgA, that is, the MsgA may include two parts, namely, the RA preamble and a Physical Uplink Shared Channel (PUSCH).

Step two, msgB reception

The terminal receives message 2 and message 4, referred to as MsgB, in the contention-based 4-step type random access procedure described above.

3、RA preamble

1) Composition, classification and number of RA preambles

The RA preamble may be composed of a Cyclic Prefix (CP) and a sequence (sequence).

The RA preamble can support 4 long sequences with length 839 and 9 short sequences with length 139, and the sequence length of the RA preamble can be indicated by the high-layer parameter prach-rootsequence index.

Each cell may have 64 available RA preambles and constitute one RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence. The terminal selects (or is assigned by the network device) one RA preamble from the RA preamble sequence to transmit using a physical random access channel opportunity (PRACH opportunity, RO), that is, the RA preamble is carried (or transmitted) by the RO.

The RA preamble sequence may include the following two parts:

one part is a sequence for contention based random access preamble (CBRA preamble) and non-contention based random access preamble (CFRA preamble) configured by a higher layer parameter totalNumberOfRA-Preambles;

the other part is a sequence of other RA Preambles except indicated by the higher layer parameter totalNumberOfRA-Preambles. The RA preambles in the other RA preamble sequences are used for other purposes, such as System Information (SI) requests.

It is noted that if the higher layer parameter totalNumberOfRA-Preambles does not configure a specific number of RA Preambles, then the above-mentioned 64 RA Preambles are all used for contention based random access and non-contention based random access.

In addition, CBRA preambles can be divided into two groups: group a (group a) and group B (group B). Where group B does not necessarily exist, it may be configured by the higher layer parameters ssb-perRACH-OccasionAndCB-preambessb.

The network device may configure the parameters required for contention-based random access through a higher layer parameter RACH-ConfigCommon (carried by BWP-Common in SIB 1), and the network device may configure the parameters required for non-contention-based random access through a higher layer parameter RACH-ConfigDedicated.

2) SSB association (or mapping) to PRACH occase and RA preamble

The higher layer may configure one PRACH occasion for N SSBs (configured by L1 parameter SSB-per-rach-occasion) associated with the parameter SSB-perRACH-4 cbb-preamble Perssb, and R consecutive CBRA preamble indices (configured by L1 parameter CB-preambles-per-SSBs) associated with each of the N SSBs. The configuration of N is as follows:

if N <1, one SSB is associated with 1/N consecutive active PRACH occases (e.g., if N =1/8, one SSB is associated with 8 PRACH occases), and R consecutive indexed CBRA preambles are mapped to SSB N,0< = N-1. Wherein the CBRA preamble sequence associated with the SSB starts with a CBRA preamble index of 0.

For example, if N =1/8, one SSB is associated with 8 PRACH occasions, and the SSB is associated with a starting point where 8 preamble indexes are 0.

If N is present>=1, then N SSBs are associated to one PRACH occase, and R consecutively indexed CBRA preambles are mapped to SSBs N,0<＝n<= N-1, and the CBRA preamble sequence associated with the SSB N is from CBRA preamble index to

And (4) starting. Wherein it is present>

Configured by a higher layer parameter totalNumberOfRA-Preambles and is an integer multiple of N.

For example, if N =2,

then two SSBs are associated with 1 PRACH occase 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 preambles having an index of 0 to 31, and SSB 1 is associated with indices of 32 to (the total number of CBRA preambles arranged-1).

For link recovery, the terminal indicates that N SSBs associate with one PRACH occasion through a parameter SSB-perRACH-occupancy carried by a higher-layer parameter BeamFailureRecoveryConfig. If N <1, one SSB is associated with 1/N consecutive active PRACH occasions; if N > =1, then N consecutive SSBs are associated with one PRACH opportunity.

In summary, the SSB and the PRACH occase have an association relationship, and the association relationship (or mapping relationship) between the SSB and the PRACH occase should follow the principle:

firstly, performing association in an ascending order of indexes of a preamble in a PRACH occase;

secondly, performing association according to the ascending order of indexes of the frequency domain PRACH occasting;

thirdly, performing association according to the ascending index sequence of the time domain PRACH occasion in one PRACH time slot (slot);

fourth, the correlation is performed in ascending order according to the index of PRACHslot.

4. PRACH time frequency resource

The time domain PRACH occasion (i.e. the PRACH time domain resource over which the RA premble is transmitted, or the time domain location of the PRACH occasion) may be configured by the parameter PRACH-configuration index in the higher layer parameter RACH-configuration generic.

The frequency domain PRACH occasion (i.e. the PRACH frequency domain resource over which the RA premble is transmitted, or the frequency domain location of the PRACH occasion) may be configured by the parameters msg 1-frequentstart and msg1-FDM in the higher layer parameters RACH-ConfigGeneric.

Wherein, the parameter msg1-FrequencyStart is used for configuring the offset (offset) from the initial frequency domain position of the PRACH occasting to the initial frequency domain position of the initial BWP (inter BWP) or the current active BWP (active BWP);

the parameter msg1-FDM is used for configuring how many frequency domain PRACH occasions exist on one time domain PRACH occasion.

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

The CSI-RS is similar to the SSB, with ID corresponding to the beam. If the random access process is triggered by a higher layer and the CSI-RSindex is associated with PRACH occase, when the parameter ra-preamblliendex is not 0, the parameter ra-OccasionList indicates the PRACH occase set associated with the CSI-RS Index.

6. Msg1 transmission, i.e. RA preamble transmission

In the random access procedure, the terminal may transmit Msg1 using RO. The triggering mode of the random access process includes the following 3 types:

1) PDCCH order triggering: the network device tells the terminal that the random access process needs to be restarted through a special DCI format 1_0, and tells the terminal that ra-preambeindex, SSB Index, PRACH Mask Index and UL/SUL Indicator indicating UL or SUL should be used.

2) And triggering the MAC layer: the UE selects the RA preamble itself to initiate the random access procedure.

3) Triggering by an RRC layer: such as initial access, re-establishment, handover, RRC _ INACTIVE transition to RRC _ CONNECTED state, request for other SI, RRC request at the time of synchronous re-establishment, etc.

When the terminal wants to transmit the RA preamble, the following operations need to be performed:

(1) Selecting SSB or CSI-RS

It should be noted that the PRACH occase includes an RA preamble index. The value range of the RA preamble index has an association (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 occase.

1) Selecting SSB

For SSB, it can be used in either contention-based or non-contention-based random access procedures. When selecting the SSB, the terminal may select according to different event trigger scenarios, which are as follows:

(1) non-contention based random access procedure:

for the random access process (except the trigger of the PRACH order and the trigger of the SI request) triggered by the beam failure and other events based on non-competition, 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 SS-RSRP of an SSB is larger than RSRP-ThreholdSSB, the terminal selects the SSB.

For PDCCH order to trigger a non-contention based random access procedure, the terminal directly selects the SSB indicated by PDCCH order.

For the SI request to trigger a non-competition based random access process, if SS-RSRP of one SSB is greater than a parameter RSRP-ThresholdSSB, the terminal selects the SSB; otherwise, the terminal arbitrarily selects an SSB. If SS-RSRP of a plurality of SSBs is greater than parameter RSRP-threshold SSB, the terminal selects one SSB from the plurality of SSBs arbitrarily.

(2) Contention-based random access procedure:

if SS-RSRP of one SSB is greater than parameter RSRP-threshold SSB, the terminal selects the SSB; otherwise, the terminal arbitrarily selects an SSB. If the SS-RSRP of a plurality of SSBs is greater than the parameter RSRP-threshold SSB, the terminal arbitrarily selects one SSB from the plurality of SSBs.

2) Selecting CSI-RS

For CSI-RS, it can be used in non-contention based random access procedures (in addition to PDCCH order trigger and SI request trigger) as well as in contention based random access procedures. When selecting the CSI-RS, the CSI-RSRP of the CSI-RS is compared with the parameter RSRP-threshold CSI-RS, and if the CSI-RSRP of one CSI-RS is larger than the parameter RSRP-threshold CSI-RS, the terminal selects the CSI-RS.

(2) Selecting RA preamble index

(1) For contention based random access procedure

The RA preamble index is selected by the terminal. The terminal needs to determine whether to select an RA preamble from group a or group B. If the group B exists, whether to select from the group B needs to be determined through related configuration parameters, otherwise, the group A is selected.

If the terminal has sent Msg3 and the access fails, the terminal tries to access again, and the RA preamble used when the terminal should belong to the same group as the RA preamble used when the terminal first sends Msg 3.

After the group is determined, the terminal randomly selects an RA preamble from the RA preambles associated with the selected SSB in the group.

(2) For non-contention based random access procedure

The RA preamble index is indicated by the network device. The method for allocating the RA preamble index by the network device includes the following two ways:

firstly, referring to the ra-preambeindex field configuration in PRACH-ConfigDedcated by a high layer;

second, in the PDCCH order triggered Random Access, the configuration is performed through the Random Access Preamble index field of DCI format 1_0.

(3) Selecting PRACH resources for transmitting preamble

For non-contention based random access procedures, the higher layer reference PRACH mask index may be used to determine the PRACH resource location for the non-contention based random access procedure.

For a contention-based random access process, after the terminal prepares the Msg1, determining the next available PRACH occase from the PRACH occase associated with the SSB to serve as the next available PRACH resource location; for non-contention based random access procedure, after the UE prepares Msg1, the next available PRACH resource location is determined by PRACH mask index.

There are 4 types of PRACH mask index configuration modes based on non-contention:

indicated by parameter ra-ssb-OccasionMaskIndex in high-level parameter PRACH-ConfigDedcated;

indicated by the parameter ra-ssb-OccidassionMakIndex in the high level parameter BeamFailureRecoveryConfig;

indicated by parameter ra-ssb-OccidionMakIndex in parameter SI-RequestResources of the high layer parameter SI-SchedulInfo in SIB 1;

indicated by PDCCH order by PRACH mask index in DCI format 1_0.

(4) Determining a corresponding RA-RNTI

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

RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id

wherein s _ id is an index of a first OFDM symbol of PRACH occasion (0 ≦ s _ id < 14), t _ id is an index of a first slot of PRACH occasion in a system frame (0 ≦ t _ id < 80), f _ id is an index of PRACH occasion in a frequency domain (0 ≦ f _ id < 8), UL _ carrier _ id is an UL carrier for RA preamble transmission (0 denotes a normal uplink carrier, and 1 denotes a SUL carrier).

(5) Determining target received power of RA preamble

7. MsgA transmission

In 2-step MsgA transmission with random access, msgA includes two parts, RA preamble and PUSCH. Wherein the RA preamble is carried by the RO. In order to distinguish 2-step type random access from 4-step type random access, the following two methods can be adopted:

mode 1: the 2-step type random access and the 4-step type random access can share (or share) the RO, but different RA preambles need to be adopted;

mode 2: the 2-step type random access and the 4-step type random access use different ROs.

For the way of sharing (or sharing) ROs, the 2-step type random access may share all or a subset of the ROs for the 4-step type random access.

For the way of using different ROs, the RO used for the 2-step type random access has a different index in the time domain than the RO used for the 4-step type random access.

The process for selecting resources for transmitting MsgA is as follows: the terminal selects the RO associated with the SSB according to the channel measurement; according to the size requirement of a PUSCH transmission packet in the MsgA, selecting from group A or group B; determining one PO and DMRS (De-Modulation Reference Signal) configuration under the PUSCH configuration associated with the selected RO and the selected RA preamble so that the PO carries the transport block of the PUSCH.

The 2-step random access type CBRA preambles associated with the SSB are configured by a high-level parameter msgA-CB-preamblispSSB-PerSharedRO;

2, the sequence position of the CBRA preamble of the random access type is adjacent to the sequence position of the CFRA preamble;

the starting index of the CBRA preambles of the 2-step random access type with which the SSB is associated is configured by the high layer parameter end of the 4-step CBRA preambles for that SSB.

The access capability indication method according to the embodiment of the present application is described in detail below with reference to the accompanying drawings.

As shown in fig. 4, a flowchart of an access capability indication method according to an embodiment of the present application is shown, which specifically includes the following steps:

s410, the terminal acquires the first physical random access channel opportunity RO.

And S420, the terminal indicates that the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resources according to the first RO or the first random access preamble carried by the first RO in the process of random access.

It can be understood that the terminal may indicate that the terminal has a capability of supporting access to a cell of the discontinuous frequency domain resource according to the first RO during the random access; alternatively, the first and second electrodes may be,

the terminal may indicate that the terminal has a capability of supporting access to a cell of the non-contiguous frequency domain resources according to a first random access preamble carried by the first RO in performing a random access procedure.

The first random access preamble may be used to indicate that the terminal has a capability of supporting accessing a cell of the discontinuous frequency domain resource (or to indicate that the terminal does not have a capability of supporting accessing a cell of the discontinuous frequency domain resource; or to indicate whether the terminal has a capability of supporting accessing a cell of the discontinuous frequency domain resource; or to indicate a cell of the discontinuous frequency domain resource is not supported; or to indicate whether the terminal supports accessing a cell of the discontinuous frequency domain resource), that is, the first random access preamble may be an RA preamble with an access capability indication (of a cell of the discontinuous frequency domain resource).

Correspondingly, the network device acquires the first RO or a first random access preamble carried by the first RO during the 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 access to the cell of the discontinuous frequency domain resource.

It can be understood that the network device may acquire a first RO during the random access process, where the first RO is used to indicate that the terminal has a capability of supporting the cell accessing the discontinuous frequency domain resources (or is used to indicate that the terminal does not have the capability of supporting the cell accessing the discontinuous frequency domain resources; or is used to indicate whether the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resources; or is used to indicate the cell not supporting the access of the discontinuous frequency domain resources; or is used to indicate whether the cell accessing the discontinuous frequency domain resources is supported); alternatively, the first and second electrodes may be,

the network device may acquire a first random access preamble carried by the first RO in performing a random access procedure.

It should be noted that, with the continuous evolution of the standard protocol established by the 3GPP and the continuous complication of the communication scenario, there may be discontinuous frequency domain resources in the cell. Since some terminals may support cells accessing discontinuous frequency domain resources and other terminals may not support cells accessing discontinuous frequency domain resources, when the 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 cells accessing discontinuous frequency domain resources from the terminals, the access capability of the terminal needs to be indicated to inform the network device.

Based on this, in the embodiment of the present application, in order to indicate whether a terminal has a capability (that is, an access capability) of supporting accessing a cell of a discontinuous frequency domain resource, under a cell that a certain terminal supports accessing the discontinuous frequency domain resource, the terminal may acquire a first RO, and indicate that the terminal has the capability of supporting accessing the cell of the discontinuous frequency domain resource (or indicate that the terminal supports accessing the cell of the discontinuous frequency domain resource) according to a first random access preamble carried by the first RO or the first RO in a random access process, so as to indicate the access capability (of the discontinuous frequency domain resource cell) of the terminal through the RO or the random access preamble in the random access process so as to inform a network device.

Similarly, in order to ensure that the network device can know the access capability (of the discontinuous frequency domain resource cell) of the terminal, the network device may acquire the first RO or the first random access preamble carried by the first RO during the random access process, so as to implement the possibility of knowing the access capability (of the discontinuous frequency domain resource cell) of the terminal by the indication of the RO or the indication of the random access preamble during the random access process.

With reference to the above description, the following describes an access capability indication method according to an embodiment of the present application.

Part one:

the following embodiments of the present application will specifically explain the related concepts related to the above-described method.

1. Non-contiguous frequency domain resources

The discontinuous frequency domain resources in the embodiment of the present application may be discontinuous frequency domain resources in the same cell. That is, each resource in the non-contiguous frequency domain resources may belong to the same cell.

For cells with discontinuous frequency domain resources, it can be understood that the frequency domain resources configured by the network device to a certain cell are discontinuous. The resources in the non-contiguous frequency domain resources may include multiple carriers (carriers) or multiple bandwidth parts (BWPs), which is specifically described as follows:

1) The resources in the non-contiguous frequency-domain resources may include a plurality of carriers.

It should be noted that the frequency domain resources between two adjacent carriers in the multiple carriers may be discontinuous, and the frequency domain resources within each carrier may be continuous or discontinuous.

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

For example, referring to fig. 5, a network device is configured with 4 carriers, i.e., a carrier 501, a carrier 502, a carrier 503, and a carrier 504, for a certain cell. The frequency domain resources between two adjacent carriers are discontinuous, and the frequency domain resources of each carrier are continuous, so that the frequency domain resources in the same cell configured to the terminal are discontinuous.

2) The resources in the non-contiguous frequency domain resources may include a plurality of bandwidth portions.

It should be noted that the frequency domain resources between two adjacent BWPs in the plurality of BWPs may be non-consecutive, and the frequency domain resources within each BWP may be consecutive.

For the frequency domain resources between two adjacent BWPs are non-continuous, it can be understood that, at the same subcarrier spacing (or the same parameter set numerology), two adjacent BWPs are non-overlapping in the frequency domain, or there is a frequency spacing between the frequency domain resources of two adjacent BWPs.

In addition, the BWPs in the multiple BWPs may be in the same carrier, or in different carriers, and the different carriers belong to the same cell.

For example, please refer to fig. 6, which takes BWP in the same carrier as an example. The network device configures 1 carrier, i.e. carrier 610, for a certain cell, and the carrier 610 includes four bandwidth portions, i.e. BWPs 6101, BWPs 6102, BWPs 6103 and BWPs 6104, while the frequency domain resources between two adjacent BWPs are non-continuous, and the frequency domain resources of each BWP are continuous, so that the frequency domain resources in the same cell configured to the terminal are non-continuous.

For example, please refer to fig. 7, which illustrates BWP being in different carriers. The network device is configured with 3 carriers, i.e., carrier 710, carrier 720, and carrier 730, for a certain cell, and the frequency domain resource of carrier 730 is discontinuous. The carrier 710 includes two BWPs, that is, BWP 7101 and BWP 7102, the frequency domain resource between two adjacent BWPs is discontinuous, and the frequency domain resource of each BWP is continuous, so that the configured frequency domain resource of the carrier 710 is discontinuous.

Similarly, the carrier 720 includes three bandwidth portions, that is, BWP 7201, BWP 7202 and 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 configured frequency domain resources of the carrier 720 are discontinuous.

In addition, the frequency domain resources between BWP 7102 in carrier 710 and BWP 7201 in carrier 720 are non-contiguous. In short, the frequency domain resources in the same cell configured to the terminal through carrier 710, carrier 720, and carrier 730 are non-continuous.

To sum up, the terminal of the embodiment of the present application may support a cell accessing discontinuous frequency domain resources, that is, the terminal has a capability of accessing the cell accessing discontinuous frequency domain resources, and the resources in the discontinuous frequency domain resources may include multiple carriers or multiple bandwidth parts; the frequency domain resources between two adjacent carriers may be discontinuous, or the frequency domain resources between two adjacent bandwidth parts may be discontinuous.

2. First RO and first random access preamble

It should be noted that, in the process of establishing communication between the terminal and the network device, the network device may configure parameters for random access, such as high-layer parameters RACH-ConfigCommon, RACH-ConfigCommon twos prb a, RACH-ConfigDedicated, RACH-ConfigGeneric, RACH-configgenetic tws prb a, and the like, to the terminal.

In addition, the network device may configure a PRACH time-frequency resource for random access to the terminal, and the PRACH time-frequency resource may include an RO set for transmitting (or carrying) an RA preamble. The RO set may include an RO for 4-step type random access, an RO for 2-step type random access, an RO shared (or shared) by 4-step type random access and 2-step type random access, and the like.

In this embodiment, in order to enable indication of access capability of the terminal (of the cell of the non-contiguous frequency domain resource), the set of ROs configured by the network device to the terminal may include a dedicated (dedicated) or specific (specific) RO (i.e., a first RO), which may be used to indicate access capability of the terminal, or may carry an RA preamble (i.e., a first random access preamble) used for the access capability indication.

(1) First RO

1) The first RO may be (or be) an RO for 4-step type random access, an RO for 2-step type random access, or an RO shared (or shared) by both 4-step type random access and 2-step type random access.

For the RO for the 4-step type random access, it can be understood as the RO used for the 4-step type random access. Therefore, when the terminal uses the RO for 4-step type random access to transmit the RA preamble, it indicates that the random access performed by the terminal is 4-step type random access.

For the RO for the 2-step type random access, it can be understood as the RO used for the 2-step type random access. Therefore, when the terminal uses the RO for the 2-step type random access to transmit the RA preamble, it indicates that the random access performed by the terminal is the 2-step type random access.

For the RO shared (or shared) by the 4-step type random access and the 2-step type random access, it can be known from the contents in the above-mentioned "Msg1 transmission" and "MsgA transmission", and the 2-step type random access and the 4-step type random access may use a shared (or shared) RO manner, or may use different ROs. For the RO sharing (or sharing) manner, the 2-step type random access may share all the ROs or a subset of the ROs of the 4-step type random access, but different RA preambles need to be adopted; for the way of using different ROs, the RO used for the 2-step type random access has a different index in the time domain than the RO used for the 4-step type random access.

2) The first RO may belong to (or be) an RO configured by a higher layer parameter specifically (dedicated) for the terminal.

At this time, the time-frequency domain position of the first RO may be configured by terminal-specific high layer signaling (UE-specific high layer signaling). For example, the time-domain location of the first RO may be configured by the dedicated parameter prach-configuration index in the higher layer parameter RACH-configuration generic, and the frequency-domain location of the first RO may be configured by the dedicated parameter msg1-frequency Start and the dedicated parameter msg1-FDM in the higher layer parameters. The special parameter msg1-FrequencyStart is used for configuring the offset from the initial frequency domain position of the first RO to the initial BWP or the initial frequency domain position of the current active BWP; the dedicated parameter msg1-FDM is used to configure how many frequency domain first ROs are on one time domain first RO.

In summary, the first RO may belong to one of an RO for 4-step type random access, an RO for 2-step type random access, an RO configured by a higher layer parameter specifically for the terminal, and an RO shared by 4-step type random access and 2-step type random access.

(2) First random access preamble

As can be known from the content in the "RA preamble", the cell of the discontinuous frequency domain resource in the embodiment of the present application may have an RA preamble sequence composed of 64 available RA preambles. The RA preamble sequence may include at least one of a CBRA preamble sequence, a CFRA preamble sequence, and other RA preamble sequences. Wherein, the CBRA preamble sequence and the CFRA preamble sequence can be configured by a higher layer parameter totalNumberOfRA-Preambles.

Since the random access performed by the terminal in the embodiment of the present application is contention-based random access (e.g., 4-step type random access or 2-step type random access), a first random access preamble that the terminal uses the first RO for transmission (i.e., the first random access preamble carried by the first RO) may belong to the CBRA preamble. That is, the first random access preamble is RA preamble selected from CBRA preamble sequence.

To sum up, in the embodiment of the present application, a sequence composed of RA preambles having an access capability indication (of a cell of a discontinuous frequency domain resource) is included in an RA preamble sequence included in the cell of the discontinuous frequency domain resource. Wherein, the RA preamble selected from the sequence may be used as the first random access preamble in the embodiment of the present application.

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

As can be known from the above description of "Msg1 transmission", in the contention-based random access procedure, the terminal may compare the SS-RSRP obtained from the channel measurement with the parameter RSRP-threshold SSB to select the SSB, and determine the RO associated with the selected SSB and the CBRA codes of the 4-step type random access according to the higher-layer parameter SSB-perRACH-occupancy and dcb-priority SSB.

Thus, the first random access preamble may comprise at least one CBRA preamble of 4-step type random access in a CBRA preamble sequence of 4-step type random access associated with the SSB.

As can be known from the above description of "MsgA transmission", in the contention-based 2-step type random access process, the terminal may compare the SS-RSRP obtained from the channel measurement with the parameter RSRP-threshold SSB to select the SSB, and determine the CBRA preambles of the 2-step type random access associated with the selected SSB according to the higher-layer parameter MsgA-CB-preamplified _ perssb-persedro, and the start index of the CBRA preambles of the 2-step type random access associated with the selected SSB is configured by the higher-layer parameter end of the 4-step CBRA preambles for the same SSB.

(4) The first RO is associated with the CSI-RS

The CSI-RS is similar to the SSB, with ID corresponding to the beam.

As can be seen from the above description of "Msg1 transmission", in the contention-based random access process, the terminal may compare the CSI-RSRP obtained by channel measurement with the parameter RSRP-threshold CSI-RS to select the CSI-RS.

If the random access process is triggered by a high layer and the selected CSI-RS is associated with PRACH occase, when the parameter ra-preambleIndex is not 0, the parameter ra-OccastionList indicates the PRACH occase set associated with the selected CSI-RS.

(5) Random access

It should be noted that, in this embodiment of the present application, the random access performed by the terminal or the network device may 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 may be triggered by a PDCCH order, a MAC layer, or an RRC layer, for example, which is described in the Msg1 transmission.

In summary, in "part one", the terminal may select the first RO from the RO set configured by the network device, so that the indication of the access capability (of the discontinuous frequency domain resource cell) of the terminal is realized by the RO in the random access procedure so as to inform the network device.

In addition, the RA preamble sequence included in the cell of the discontinuous frequency domain resource according to the embodiment of the present application may include at least one of the following sequences:

(1) a CBRA preamble sequence;

the CBRA preamble sequence may include a CBRA preamble sequence for 4-step type random access and/or a CBRA preamble sequence for 2-step type random access.

The 4-step or 2-step type CBRA preamble sequence may in turn comprise at least one of:

an RA preamble sequence for indicating a cell which does not support access to discontinuous frequency domain resources;

an RA preamble sequence (i.e. a sequence to which the first random access preamble belongs) for indicating a cell supporting access to the discontinuous frequency domain resource;

an RA preamble sequence for indicating support of uplink coverage enhancement;

an RA preamble sequence used for indicating that the uplink coverage enhancement is not supported;

the method comprises the steps of indicating a cell which does not support accessing discontinuous frequency domain resources and an RA preamble sequence which does not support uplink coverage enhancement at the same time;

the RA preamble sequence is used for simultaneously indicating the cell which does not support accessing the discontinuous frequency domain resources and the RA preamble sequence which supports the uplink coverage enhancement;

the method comprises the steps of simultaneously indicating a cell supporting access of discontinuous frequency domain resources and an RA preamble sequence not supporting uplink coverage enhancement;

the RA preamble sequence is used for simultaneously indicating a cell supporting access of discontinuous frequency domain resources and an RA preamble sequence supporting uplink coverage enhancement;

and the like;

(2) a CFRA preamble sequence;

(3) other RA preamble sequences.

And part two:

the following describes the arrangement order between RA preamble sequences of various types in "part one" in order to select the first random access preamble of the embodiment of the present application.

1. Sequence of CBRA preamble sequences, CFRA preamble sequences and other RA preamble sequences

It should be noted that, the CBRA preamble sequence, the CFRA preamble sequence, and the other RA preamble sequences are sequentially arranged, as shown in fig. 8.

2. CBRA preamble sequence of 4-step type random access and CBRA preamble sequence of 2-step type random access

(1) The 2-step type random access and the 4-step type random access adopt different RO

The RO for the 4-step type random access is not shared (or not shared) with the RO for the 2-step type random access, and there are two types as follows:

(1) when the performed random access is a 4-step type random access based on contention, the terminal uses the RO of the 4-step type random access to transmit an RA preamble. At this time, the RA preamble is one RA preamble selected by the terminal from the CBRA preamble sequence of 4-step type random access included in the CBRA preamble sequence.

(2) When the performed random access is a 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 sequence of the 2-step type random access included in the CBRA preamble sequence.

(2) 2-step type random access and 4-step type random access shared (or shared) RO

The RO for the 4-step type random access is shared (or shared) with the RO for the 2-step type random access, and there is one of the following:

when the performed random access is contention-based random access, the terminal transmits an RA preamble using an RO shared by the 4-step type random access and the 2-step type random access. At this time, the RA preamble is one RA preamble selected by the terminal from the CBRA preamble sequence for 4-step type random access and the CBRA preamble sequence for 2-step type random access included in the CBRA preamble sequence.

There are two permutations of this:

(1) the position of the CBRA preamble sequence of the 4-step type random access is in front of the CBRA preamble sequence of the 2-step type random access;

illustratively, as shown in fig. 9.

(2) The position of the CBRA preamble sequence for 4-step type random access is after the CBRA preamble sequence for 2-step type random access.

3. RA preamble sequences of various types in CBRA preamble sequence

Since there may be a plurality of RA preamble sequences with different indication capabilities for CBRA preamble sequences, the following description will be divided into cases.

The first situation is as follows:

the CBRA preamble sequence includes an RA preamble sequence for indicating a cell that does not support access to the discontinuous frequency domain resource, and an RA preamble sequence for indicating a cell that supports access to the discontinuous frequency domain resource. Wherein, the following two arrangement orders exist in case one:

1) The position of the RA preamble sequence used for indicating the cell which does not support the access of the discontinuous frequency domain resources is positioned before the RA preamble sequence used for indicating the cell which supports the access of the discontinuous frequency domain resources;

2) The location of the RA preamble sequence for indicating the cell that does not support access to the discontinuous frequency domain resource is after the RA preamble sequence for indicating the cell that supports access to the discontinuous frequency domain resource.

In this embodiment, for an RA preamble sequence used for indicating a cell supporting access to discontinuous frequency domain resources, it may be understood that the first random access preamble belongs to the sequence.

Next, whether the ROs used for the 2-step type random access and the 4-step type random access are shared (or shared) will be further described,

(1) Different RO is adopted between the 2-step type random access and the 4-step type random access

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

At this time, for the RA preamble sequence used for indicating the cell supporting access to the discontinuous frequency domain resource, it may be understood that a 4-step CBRA preamble sequence used for indicating the cell supporting access to the discontinuous frequency domain resource, that is, a sequence to which the first random access preamble belongs to the CBRA preamble sequence of the 4-step random access.

Similarly, for the RA preamble sequence used for indicating the cell which does not support accessing the discontinuous frequency domain resource, it can be understood that the RA preamble sequence used for indicating the cell which does not support accessing the discontinuous frequency domain resource is a 4-step CBRA RA preamble sequence, that is, the sequence to which the second random access preamble belongs to the 4-step CBRA preamble sequence of random access.

The second random access preamble is a CBRA preamble used for indicating a 4-step type random access for a cell that does not support access to the discontinuous frequency domain resources.

Thus, there are two following ordering sequences:

1) The sequence to which the first random access preamble code belongs is before the sequence to which the second random access preamble code belongs;

it can be understood that the CBRA preamble for indicating the cell supporting the access to the discontinuous frequency domain resource is before the CBRA preamble for indicating the cell supporting the access to the discontinuous frequency domain resource.

2) The sequence to which the first random access preamble belongs is after the sequence to which the second random access preamble belongs;

it can be understood that the CBRA preamble for indicating the cell supporting the access to the discontinuous frequency domain resource is after the CBRA preamble for indicating the cell supporting the access to the discontinuous frequency domain resource.

For example, please refer to fig. 10, which shows that the sequence to which the first random access preamble belongs is located after the sequence to which the second random access preamble belongs.

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

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

Similarly, for the RA preamble sequence used for indicating the cell which does not support accessing the discontinuous frequency domain resource, it can be understood as a CBRA preamble sequence used for indicating the 2-step type random access of the cell which does not support accessing the discontinuous frequency domain resource, that is, the sequence to which the third random access preamble belongs to the CBRA preamble sequence of the 2-step type random access.

The third random access preamble is a CBRA preamble used for indicating a 2-step type random access of a cell that does not support access to the discontinuous frequency domain resources.

Thus, there are two permutations as follows:

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

it can be appreciated that the CBRA preamble for indicating the cell supporting access to the discontinuous frequency domain resource is before the CBRA preamble for indicating the cell supporting access to the discontinuous frequency domain resource.

2) The sequence to which the first random access preamble belongs is subsequent to the sequence to which the third random access preamble belongs;

it can be understood that the CBRA preamble for indicating the cell supporting the access discontinuous frequency domain resource is after the CBRA preamble for indicating the cell supporting the access discontinuous frequency domain resource.

For example, please refer to fig. 11, which shows that the sequence to which the first random access preamble belongs is located after the sequence to which the third random access preamble belongs.

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

At this time, the sequence to which the first random access preamble belongs may belong to a CBRA preamble sequence of 4-step type random access, or may belong to a CBRA preamble sequence of 2-step type random access.

As can be seen from the above description, the sequence to which the second random access preamble belongs to the CBRA preamble sequence of 4-step type random access, and the sequence to which the third random access preamble belongs to the CBRA preamble sequence of 2-step type random access.

Therefore, in the case of sharing the RO, it is necessary to jointly consider the influence of a factor (i.e., factor 1) of whether or not to support the cell accessing the discontinuous frequency domain resource and a factor (i.e., factor 2) of the permutation 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 on the permutation order of the three.

Wherein, the influence of the factor 1 on the arrangement sequence of the three is as follows:

the CBRA preamble used for indicating the cell supporting the access of the discontinuous frequency domain resources is positioned behind the CBRA preamble used for indicating the cell not supporting the access of the discontinuous frequency domain resources; alternatively, the first and second electrodes may be,

the CBRA preamble for indicating the cell supporting the access to the discontinuous frequency domain resource is before the CBRA preamble for indicating the cell not supporting the access to the discontinuous frequency domain resource.

Wherein, the influence of the factor 2 on the arrangement sequence of the three is as follows:

the position of the CBRA preamble sequence of the 4-step type random access is positioned in front of the CFRA preamble sequence of the 2-step type random access; alternatively, the first and second electrodes may be,

the position of the CBRA preamble sequence for 4-step type random access is after the CBRA preamble sequence for 2-step type random access.

Therefore, for the case that both factor 1 and factor 2 affect the above three permutation sequences, the embodiment of the present application may consider factor 1 and factor 2 first, or factor 2 and factor 1 first, based on the priority criteria.

a) For the case of considering factor 1 first and factor 2 second, there are several permutations as follows:

(1) the first arrangement order:

when the influence of factor 1 on the ranking order is:

the CBRA preamble used for indicating the cell supporting the access of the discontinuous frequency domain resources is positioned behind the CBRA preamble used for indicating the cell not supporting the access of the discontinuous frequency domain resources;

and the effect of factor 2 on the ranking order is:

the position of the CBRA preamble sequence for 4-step type random access precedes the CBRA preamble sequence for 2-step type random access.

At this time, 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, and the sequence to which the second random access preamble belongs is after the sequence to which the third random access preamble belongs.

Illustratively, as shown in fig. 12.

(2) The second arrangement order:

when the influence of factor 1 on the ranking order is:

the CBRA preamble used for indicating the cell supporting the access discontinuous frequency domain resource is positioned before the CBRA preamble used for indicating the cell not supporting the access discontinuous frequency domain resource;

and the effect of factor 2 on the ranking order is:

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.

Illustratively, as shown in fig. 13.

In the same way, other arrangement orders are not described herein.

b) For the case of considering the factor 2 first and then considering the factor 1, the embodiment of the present application only provides the following arrangement sequence, and other arrangement sequences can be known in the same way, which is not described again.

(1) First arrangement order:

when the influence of factor 2 on the ranking order is:

the position of the CBRA preamble sequence of the 4-step type random access is positioned in front of the CBRA preamble sequence of the 2-step type random access;

and the effect of factor 1 on the ranking order is:

the CBRA preamble used for indicating the cell supporting the access discontinuous frequency domain resource is positioned behind the CBRA preamble used for indicating the cell not supporting the access discontinuous frequency domain resource;

at this time, the sequence to which the second random access preamble code belongs is before the sequence to which the third random access preamble code belongs, and

if the sequence to which the first random access preamble belongs to the CBRA preamble sequence of the 4-step type random access, the sequence to which the first random access preamble belongs is located before the sequence to which the third random access preamble belongs, that is, the sequence to which the first random access preamble belongs is located 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 fig. 14;

if the sequence to which the first random access preamble belongs to the CBRA preamble sequence of the 2-step type random access, the sequence to which the first random access preamble belongs is located behind the sequence to which the third random access preamble belongs, that is, the sequence to which the first random access preamble belongs is located behind the sequence to which the second random access preamble belongs and the sequence to which the third random access preamble belongs, as shown in fig. 15.

In summary, in case one, the following ordering may exist:

if the first RO belongs to 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 lead code belongs is behind or in front of the position of the sequence to which the second random access lead code belongs;

if the first RO belongs to the RO of the 2-step type random access and the RO of the 4-step type random access are not shared, the position of the sequence to which the first random access lead code belongs is behind or in front of the position of the sequence to which the third random access lead code belongs;

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 lead code belongs is before, after or between the position of the sequence to which the second random access lead code belongs and the position of the sequence to which the third random access lead code belongs;

and so on.

Case two:

the CBRA preamble sequence includes an RA preamble sequence for simultaneously indicating a cell which does not support access to the discontinuous frequency domain resource and does not support uplink coverage enhancement, an RA preamble sequence for simultaneously indicating a cell which does not support access to the discontinuous frequency domain resource and supports uplink coverage enhancement, an RA preamble sequence for simultaneously indicating a cell which supports access to the discontinuous frequency domain resource and does not support uplink coverage enhancement, and an RA preamble sequence for simultaneously indicating a cell which supports access to the discontinuous frequency domain resource and supports uplink coverage enhancement.

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

In case two, whether the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resources and whether the terminal has the capability of supporting the uplink coverage enhancement may be indicated by the same RA preamble.

Therefore, the first random access preamble of the embodiment of the present application may be used to indicate that the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resource and the capability of supporting the uplink coverage enhancement at the same time. At this time, the sequence to which the first random access preamble belongs may be understood as an RA preamble sequence for simultaneously indicating a cell supporting access to the discontinuous frequency domain resource and supporting uplink coverage enhancement.

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

the method comprises the steps of indicating that a CBRA preamble supporting uplink coverage enhancement is behind a CBRA preamble not supporting uplink coverage enhancement; alternatively, the first and second electrodes may be,

and the CBRA preamble used for indicating that the CBRA preamble supporting the uplink coverage enhancement is positioned before the CBRA preamble not supporting the uplink coverage enhancement.

Therefore, for the case that both factor 1 and factor 3 affect the permutation sequence, the embodiment of the present application may consider factor 1 and factor 3, or consider factor 3 and factor 1 based on the priority criteria.

a) For the case of considering the factor 1 first and then considering the factor 3, the embodiment of the present application only provides the following arrangement sequence, and other arrangement sequences can be known in the same way, which is not described again.

(1) First arrangement order:

when the influence of factor 1 on the ranking order is:

and the effect of factor 3 on the ranking order is:

and the CBRA preamble used for indicating that the CBRA preamble supporting the uplink coverage enhancement is positioned behind the CBRA preamble not supporting the uplink coverage enhancement.

At this time, the RA preamble sequences for simultaneously indicating the cell which does not support the access discontinuous frequency domain resource and does not support the uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which does not support the access discontinuous frequency domain resource and supports the uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which supports the access discontinuous frequency domain resource and does not support the uplink coverage enhancement, and the RA preamble sequences for simultaneously indicating the cell which supports the access discontinuous frequency domain resource and supports the uplink coverage enhancement are sequentially ordered, as shown in fig. 16.

b) For the case of considering the factor 3 first and then considering the factor 1, the embodiment of the present application only provides the following arrangement sequence, and other arrangement sequences can be known in the same way, which is not described again.

(1) First arrangement order:

when the influence of factor 3 on the ranking order is:

the method comprises the steps of indicating that a CBRA preamble supporting uplink coverage enhancement is behind a CBRA preamble not supporting uplink coverage enhancement;

and the effect of factor 1 on the ranking order is:

at this time, the RA preamble sequences for simultaneously indicating the cell which does not support accessing the discontinuous frequency domain resource and does not support uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which supports accessing the discontinuous frequency domain resource and does not support uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which does not support accessing the discontinuous frequency domain resource and supports uplink coverage enhancement, and the RA preamble sequences for simultaneously indicating the cell which supports accessing the discontinuous frequency domain resource and supports uplink coverage enhancement are sequentially ordered as shown in fig. 17.

(1) Different RO is adopted for 2-step type random access and 4-step type random access

When 4-step random access based on competition is carried out, various sequences included in the CBRA preamble sequence belong to the CBRA preamble sequence of 4-step random access.

At this time, the arrangement sequence of the various sequences included in the CBRA preamble sequence is consistent with the above, and will not be described again.

Similarly, when 2-step random access based on competition is performed, various sequences included in the CBRA preamble sequence belong to the CBRA preamble sequence of 2-step type random access.

Based on the above-mentioned same principle, in the case of sharing RO, the embodiment of the present application needs to jointly consider the influence of the factor 1, the factor 2, and the factor 3 on the permutation sequence.

Similarly, the present embodiment may consider factor 1, factor 2, and factor 3 based on a priority criterion.

In the following embodiment of the present application, only a case of considering the factor 2 first, considering the factor 3 second, and considering the factor 1 last is given, and the arrangement sequence under other priority criteria can be known in the same way, and details thereof are not repeated.

(1) First arrangement order:

when the influence of factor 2 on the ranking order is:

the position of the CBRA preamble sequence of the 4-step type random access is in front of the CBRA preamble sequence of the 2-step type random access;

the influence of the further factor 3 on the ranking order is:

indicating that the CBRA preamble supporting uplink coverage enhancement is behind the CBRA preamble not supporting uplink coverage enhancement

The final factor 1 has an effect on the ranking order of

The CBRA preamble for indicating the cell supporting the access discontinuous frequency domain resource is positioned after the CBRA preamble for indicating the cell not supporting the access discontinuous frequency domain resource.

At this time, the RA preamble sequences for simultaneously indicating the cell which does not support accessing the discontinuous frequency domain resource and does not support uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which supports accessing the discontinuous frequency domain resource and does not support uplink coverage enhancement, the RA preamble sequences for simultaneously indicating the cell which does not support accessing the discontinuous frequency domain resource and supports uplink coverage enhancement, and the RA preamble sequences for simultaneously indicating the cell which supports accessing the discontinuous frequency domain resource and supports uplink coverage enhancement are sequentially ordered as shown in fig. 18.

In summary, in case two, the following arrangement may exist:

if the first random access preamble is also used for indicating that the terminal has the capability of supporting uplink coverage enhancement, 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 with the RO of 2-step type random access, the position of the sequence to which the first random access preamble belongs is behind or before the position of the sequence to which the fourth random access preamble belongs; the fourth random access lead code is used for simultaneously indicating a cell supporting access of discontinuous frequency domain resources and a random access lead code of 4-step type random access not supporting uplink coverage enhancement;

if the first random access preamble is also used for indicating that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO for the 2-step type random access, and the RO for the 2-step type random access and the RO for the 4-step type random access are not shared, the position of the sequence to which the first random access preamble belongs is located behind or in front of the sequence position of the fifth random access preamble; the fifth random access preamble is used for simultaneously indicating a cell which does not support accessing discontinuous frequency domain resources and a random access preamble of 2-step type random access which does not support uplink coverage enhancement;

if the first RO belongs to ROs 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.

And so on.

A third situation:

the CBRA preamble sequence includes an RA preamble sequence for indicating a cell that does not support access to the discontinuous frequency domain resource, an RA preamble sequence for indicating a cell that supports access to the discontinuous frequency domain resource (i.e., a sequence to which a preamble of the first random access belongs), an RA preamble sequence for indicating support of uplink coverage enhancement, and an RA preamble sequence for indicating that does not support uplink coverage enhancement.

Meanwhile, different from the above "case two", whether the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resource and whether the terminal has the capability of supporting the uplink coverage enhancement are indicated by different RA preambles.

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 discontinuous frequency domain resource, but cannot indicate that the terminal has 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.

Similar to the above-described "case two", both factor 1 and factor 3 affect the alignment sequence. Similarly, the embodiment of the present application may consider factor 1 before factor 3, or consider factor 3 before factor 1 based on the priority criteria.

(1) First arrangement order:

when the influence of factor 1 on the ranking order is:

and the effect of factor 3 on the ranking order is:

At this time, an RA preamble sequence for indicating a cell that does not support access to the discontinuous frequency domain resource, an RA preamble sequence for indicating a cell that supports access to the discontinuous frequency domain resource, an RA preamble sequence for indicating that does not support uplink coverage enhancement, and an RA preamble sequence for indicating that supports uplink coverage enhancement are shown in fig. 19.

(1) The first arrangement order:

when the influence of factor 3 on the ranking order is:

and the effect of factor 1 on the ranking order is:

at this time, the RA preamble sequence for indicating that the uplink coverage enhancement is not supported, the RA preamble sequence for indicating that the uplink coverage enhancement is supported, the RA preamble sequence for indicating that the cell that the access to the discontinuous frequency domain resource is not supported, and the RA preamble sequence for indicating that the cell that the access to the discontinuous frequency domain resource is supported are sequentially ordered, as shown in fig. 20.

At this time, the arrangement order of the various sequences included in the CBRA preamble sequence is consistent with that described above, and will not be described again.

(1) First arrangement order:

when the influence of factor 2 on the ranking order is:

the influence of the further factor 3 on the ranking order is:

The final factor 1 has an effect on the ranking order of

At this time, the RA preamble sequence for indicating that the uplink coverage enhancement is not supported, the RA preamble sequence for indicating that the uplink coverage enhancement is supported, the RA preamble sequence for indicating that the cell that the access to the discontinuous frequency domain resource is not supported, and the RA preamble sequence for indicating that the cell that the access to the discontinuous frequency domain resource is supported are sequentially ordered, as shown in fig. 21.

In summary, in case three, the following arrangement may exist:

if the capability of the terminal supporting the uplink coverage enhancement is not indicated by the first random access preamble, 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 behind or in front of 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 supporting uplink coverage enhancement;

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 an RO for a 2-step random access type, and the RO for the 2-step random access type is not shared with the RO for the 4-step random access type, 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 seventh random access preamble is located; the seventh random access preamble is a random access preamble used for indicating 2-step type random access supporting uplink coverage enhancement;

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 ROs 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 in-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.

In summary, in the "part two", the embodiment of the present application describes an arrangement order between various RA preamble sequences included in a cell of a non-contiguous frequency domain resource. In order to indicate whether the terminal has the capability (i.e., access capability) of supporting the access to the cell of the discontinuous frequency domain resource, the terminal may select the first random access preamble of the embodiment of the present application from the cell supporting the access to the discontinuous frequency domain resource and/or the RA preamble sequence supporting the uplink coverage enhancement through the RA preamble, so as to indicate the access capability (of the discontinuous frequency domain resource cell) of the terminal through the random access preamble in the random access process, so as to notify the network device.

The above description has mainly described the solution of the embodiments of the present application from the perspective of the method side. It is understood that the terminal or the network device includes a hardware structure and/or a software module for performing the respective functions in order to implement the above functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the present application may perform division of functional units on a terminal or a network device according to the above method example. For example, each functional unit may be divided for each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the units in the embodiment of the present application is illustrative, and is only one division of the logic functions, and there may be another division in actual implementation.

In the case of an integrated unit, fig. 22 provides a block diagram of functional units of an access capability indicating apparatus. The access capability indicating apparatus 2200 includes: a processing unit 2202 and a communication unit 803. Processing section 2202 controls and manages the operation of access capability indicating apparatus 2200. For example, the processing unit 2202 is configured to support the access capability indicating apparatus 2200 to perform the steps performed by the terminal in fig. 4 and other processes for the technical solutions described in this application. The communication unit 2203 is configured to support communication between the access capability indicating apparatus 2200 and other devices in the wireless communication system. The access capability indicating apparatus 2200 may further include a storage unit 2201 for storing the program codes executed by the access capability indicating apparatus 2200 and the transmitted data.

It should be noted that the access capability indicating device 2200 may be a chip or a chip module.

The processing unit 2202 may be a processor or a controller, such as 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 device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processing unit 2202 also can be a combination that performs a computing function, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, and the like. The communication unit 2203 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 2201 may 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 indicating apparatus 2200 in the embodiment of the present application may be a terminal shown in fig. 24.

In a specific implementation, the processing unit 2202 is configured to perform any one of the steps performed by the terminal in the above-described method embodiments, and when performing data transmission such as transmission, optionally invokes the communication unit 2203 to complete the corresponding operation. The details will be described below.

The processing unit 2202 is configured to: acquiring a first physical random access channel opportunity (RO); and indicating that the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resources according to the first RO or the first random access preamble carried by the first RO in the random access process.

It should be noted that specific implementation of each operation in the embodiment shown in fig. 22 may be described in detail in the method embodiment shown in fig. 4, and details are not described here again.

In particular, the first RO and/or the first random access preamble is associated to a synchronization signal block SSB or a channel state information reference signal CSI-RS selected by the terminal by channel measurement.

Specifically, the first RO belongs to one of an RO for 4-step type random access, an RO for 2-step type random access, an RO configured by a higher layer parameter specifically for the terminal, and an RO shared by 4-step type random access and 2-step type random access.

Specifically, if the first RO belongs to an RO for 4-step type random access and the RO for 4-step type random access is not shared with the RO for 2-step type random access, then

The position of the sequence to which the first random access preamble code belongs is after or before the position of the sequence to which the second random access preamble code belongs;

the second random access preamble is a random access preamble for indicating a 4-step type random access that does not support access to a cell of the non-contiguous frequency domain resources.

Specifically, if the first RO belongs to an RO for 2-step type random access and the RO for 2-step type random access is not shared with the RO for 4-step type random access, then

The position of the sequence to which the first random access preamble code belongs is after or before the position of the sequence to which the third random access preamble code belongs;

the third random access preamble is a random access preamble for indicating a 2-step type random access that does not support access to a cell of the non-contiguous frequency domain resources.

Specifically, if the first RO belongs to ROs 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;

the second random access preamble is a random access preamble of 4-step type random access for indicating a cell which does not support accessing discontinuous frequency domain resources;

Specifically, if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to an RO for 4-step type random access, and the RO for 4-step type random access is not shared with the RO for 2-step type random access, then the first random access preamble is used to indicate that the terminal has the capability of supporting uplink coverage enhancement

The position of the sequence to which the first random access lead code belongs is behind or before the position of the sequence to which the fourth random access lead code belongs;

the fourth random access preamble is a random access preamble used for simultaneously indicating a cell supporting access to discontinuous frequency domain resources and a 4-step type random access which does not support uplink coverage enhancement.

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

The position of the sequence to which the first random access lead code belongs is behind or in front of the position of the sequence to which the fifth random access lead code belongs;

the fifth random access preamble is a random access preamble used for indicating a cell which does not support accessing discontinuous frequency domain resources and a 2-step type random access which does not support uplink coverage enhancement at the same time.

Specifically, if the first RO belongs to ROs shared by the 4-step type random access and the 2-step type random access, then the first RO is a shared RO

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

the fourth random access preamble is a random access preamble for simultaneously indicating 4-step type random access of a cell which does not support uplink coverage enhancement and does not support access to discontinuous frequency domain resources;

the fifth random access preamble is a random access preamble for indicating 2-step type random access of a cell that does not support uplink coverage enhancement and does not support access to discontinuous frequency domain resources at the same time.

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 an RO for 4-step type random access, and the RO for 4-step type random access is not shared with the RO for 2-step type random access, then

The position of the sequence to which the first random access lead code belongs is behind or in front of the position of the sequence to which the sixth random access lead code belongs;

the sixth random access preamble is a random access preamble for indicating a 4-step type random access supporting uplink coverage enhancement.

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 the ROs for the 2-step random access type, and the RO for the 2-step type random access is not shared with the RO for the 4-step type random access, then

The position of the sequence to which the first random access lead code belongs is behind or before the position of the sequence to which the seventh random access lead code belongs;

the seventh random access preamble is a random access preamble for indicating 2-step type random access supporting uplink coverage enhancement.

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 ROs 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 code belongs is before, after or between the position of the sequence to which the sixth random access preamble code belongs and the position of the sequence to which the seventh random access preamble code belongs;

the sixth random access preamble is a random access preamble used for indicating 4-step type random access supporting uplink coverage enhancement;

the seventh random access preamble is a random access preamble for indicating a 2-step type random access supporting uplink coverage enhancement.

In the case of an integrated unit, fig. 23 provides a block diagram of functional units of yet another access capability indicating apparatus. The access capability indicating device 2300 includes: a processing unit 2302 and a communication unit 2303. The processing unit 2302 is used for controlling and managing the actions of the access capability indicating apparatus 2300, for example, the processing unit 2302 is used for supporting the access capability indicating apparatus 2300 to perform the steps performed by the network device in fig. 4 and other processes used in the technical solutions described in this application. The communication unit 2303 is used to support communication between the access capability indicating apparatus 2300 and other devices in the wireless communication system. The access capability indicating apparatus 2300 may further include a storage unit 2301 for storing program codes executed by the access capability indicating apparatus 2300 and data transferred.

It should be noted that the access capability indicating device 2300 may be a chip or a chip module.

The processing unit 2302 may be a processor or a controller, and may be, for example, a CPU, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processing unit 2302 may also be a combination comprising one or more microprocessors, a combination of DSPs and microprocessors, etc. implementing a computing function. The communication unit 2303 may be a communication interface, a transceiver, a transmitting-receiving circuit, or the like, and the storage unit 2301 may 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 indicating device 2300 of the embodiment of the present application may be a network device shown in 25.

In particular implementation, the processing unit 2302 is configured to perform any one of the steps performed by the network device in the above method embodiments, and optionally invokes the communication unit 2303 to complete the corresponding operation when performing data transmission, such as sending. The details will be described below.

The processing unit 2302 is used for: and acquiring a first physical random access channel (RO) or a first random access preamble carried by the first RO in the process of random access, wherein the first RO or the first random access preamble is used for indicating that the terminal has the capability of supporting the cell of the discontinuous frequency domain resource.

It should be noted that specific implementation of each operation in the embodiment shown in fig. 23 may be detailed in the description of the method embodiment shown in fig. 4, and details are not described herein again.

The position of the sequence to which the first random access preamble code belongs is before, after or between the position of the sequence to which the second random access preamble code belongs and the position of the sequence to which the third random access preamble code belongs;

The position of the sequence to which the first random access lead code belongs is behind or in front of the position of the sequence to which the fourth random access lead code belongs;

the fourth random access preamble is used for simultaneously indicating a cell supporting access to discontinuous frequency domain resources and a random access preamble of 4-step type random access which does not support uplink coverage enhancement.

Specifically, if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to an RO for 2-step type random access, and the RO for 2-step type random access is not shared with an RO for 4-step type random access, then the first random access preamble is used to indicate that the terminal has the capability of supporting uplink coverage enhancement

The position of the sequence to which the first random access lead code belongs is behind or before the position of the sequence to which the fifth random access lead code belongs;

the fifth random access preamble is a random access preamble used for simultaneously indicating a cell which does not support access to discontinuous frequency domain resources and a 2-step type random access which does not support uplink coverage enhancement.

The position of the sequence to which the first random access lead code belongs is behind or before the position of the sequence to which the sixth random access lead code belongs;

the sixth random access preamble is a random access preamble for indicating 4-step type random access supporting uplink coverage enhancement.

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 the ROs for the 2-step random access type, and the RO for the 2-step random access type is not shared with the RO for the 4-step random access type, then the terminal may support uplink coverage enhancement in the second random access preamble

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 ROs shared by the 4-step type random access and the 2-step type random access, then the terminal may support uplink coverage enhancement based on the first random access preamble and the second random access preamble

Referring to fig. 24, fig. 24 is a schematic structural 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.

Memory 2420 can include, but is not limited to, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (CD-ROM), and can be used for storing program code executed by terminal 2400 and data transferred thereby.

The terminal 2400 also includes a communication interface for receiving and transmitting data.

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

The processor 2410 in the terminal 2400 is configured to execute the computer programs or instructions 2421 stored in the memory 2420 to perform the following operations: acquiring a first physical random access channel opportunity (RO); and indicating that the terminal has the capability of supporting the cell accessing the discontinuous frequency domain resources according to the first RO or the first random access preamble carried by the first RO in the random access process.

It should be noted that specific implementation of each operation may adopt corresponding description of the method embodiment shown in fig. 4, and the terminal 2400 may be configured to execute the method on the terminal side of the method embodiment in the present application, which is not described herein again in detail.

Referring to fig. 25, fig. 25 is a schematic structural diagram of a network device according to an embodiment of the present application. Network device 2500 includes, among other things, a processor 2510, a memory 2520, and a communication bus for connecting processor 2510 and memory 2520.

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

Network device 2500 also includes a communication interface for receiving and transmitting data.

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

Processor 2510 in network device 2500 is used to execute computer programs or instructions 2521 stored in memory 2520 to perform the following operations: and acquiring a first physical random access channel (RO) or a first random access preamble carried by the first RO in the process of random access, wherein the first RO or the first random access preamble is used for indicating that the terminal has the capability of supporting the cell of the discontinuous frequency domain resource.

It should be noted that the specific implementation of each operation may adopt the corresponding description of the method embodiment shown in fig. 4, and the network device 2500 may be configured to execute the method on the network device side of the method embodiment of the present application, which is not described in detail herein.

Embodiments of the present application also provide a computer-readable storage medium, where a computer program or instructions are stored on the computer-readable storage medium, and when the computer program or instructions are executed by a processor, the steps described above are implemented.

Embodiments of the present application further provide a computer program product, which includes a computer program or instructions, where the computer program or instructions, when executed by a processor, implement the steps described in the terminal or the network device in the above described steps. The computer program product may be a software installation package.

For simplicity of description, the above embodiments are described as a series of combinations of operations. Those skilled in the art should appreciate that the present application is not limited by the order of acts described, as some steps in the embodiments of the present application may occur in other orders or concurrently. In addition, those skilled in the art should also appreciate that the embodiments described in the specification all belong to the preferred embodiments, and the related actions, steps, modules or units are not necessarily required by the embodiments of the present application.

In the foregoing embodiments, the descriptions of the embodiments of the present application have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It should be clear to a person skilled in the art that the methods, steps or functions of related modules/units described in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product or in the form of computer program instructions executed by a processor. Wherein the computer program product comprises at least one computer program instruction, which may consist of corresponding software modules, which may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. The computer program instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium. For example, the computer program instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. 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, a data center, etc., that includes one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media, or semiconductor media (e.g., SSDs), among others.

Each module/unit included in each apparatus or product described in the above embodiments may be a software module/unit, a hardware module/unit, or a part of the module/unit may be a software module/unit and another part may be a hardware module/unit. For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented by using hardware such as a circuit; alternatively, a part of the modules/units included in the method may be implemented by using a software program running on a processor integrated inside a chip, and another part (if any) of the modules/units may be implemented by using hardware such as a circuit. The same applies to individual devices or products applied to or integrated in a chip module, or to individual devices or products applied to or integrated in a terminal.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application. Any modification, equivalent replacement, improvement and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An access capability indication method, comprising:

a terminal acquires a first physical random access channel opportunity (RO);

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 measurements.

3. The method of claim 1, wherein the first RO belongs to one of an RO for 4-step type random access, an RO for 2-step type random access, an RO configured by a higher layer parameter exclusively for the terminal, and an RO shared by 4-step type random access and 2-step type random access.

4. The method according to any of claims 1-3, wherein if the first RO belongs to the RO for the 4-step type random access and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then

A position of a sequence to which the first random access preamble code belongs is after or before a position of a sequence to which a second random access preamble code belongs;

the second random access preamble is a random access preamble of a 4-step type random access for indicating a cell that does not support access to non-contiguous frequency domain resources.

5. The method according to any of claims 1-3, wherein if the first RO belongs to the RO for the 2-step type random access and the RO for the 2-step type random access is not shared with the RO for the 4-step type random access, then

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 of a 2-step type random access for indicating a cell that does not support access to non-contiguous frequency domain resources.

6. The method according to any of claims 1-3, wherein if the first RO belongs to a RO shared by the 4-step type random access and the 2-step type random access, then

the second random access preamble is a random access preamble of 4-step type random access for indicating a cell which does not support access to discontinuous frequency domain resources;

7. The method according to any of claims 1-3, wherein if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO for the 4-step type random access, and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then

8. The method of any of claims 1-3, wherein if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO for the 2-step type random access, and the RO for the 2-step type random access is not shared with the RO for the 4-step type random access, then the method further comprises

the fifth random access preamble is used for simultaneously indicating a cell which does not support accessing discontinuous frequency domain resources and a random access preamble of 2-step type random access which does not support uplink coverage enhancement.

9. The method according to any of claims 1-3, wherein if 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 fourth random access preamble belongs and the position of the sequence to which the fifth random access preamble belongs;

10. The method of any of claims 1-3, wherein 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 the RO for the 4-step type random access, and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then

the sixth random access preamble is a random access preamble of a 4-step type random access for indicating support of uplink coverage enhancement.

11. The method of any of claims 1-3, wherein 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 the RO for the 2-step random access type, and the RO for the 2-step random access type is not shared with the RO for the 4-step random access type, then

the seventh random access preamble is a random access preamble of a 2-step type random access for indicating support of uplink coverage enhancement.

12. The method of any of claims 1-3, wherein 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 an RO shared by the 4-step type random access and 2-step type random access, then

the sixth random access preamble is a random access preamble for indicating 4-step type random access supporting uplink coverage enhancement;

13. An access capability indication method, comprising:

14. The method of claim 13, 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 measurements.

15. The method of claim 13, wherein the first RO belongs to one of an RO for 4-step type random access, an RO for 2-step type random access, an RO configured by a higher layer parameter exclusively for the terminal, and an RO shared by 4-step type random access and 2-step type random access.

16. The method according to any of claims 13-15, wherein if the first RO belongs to the RO for the 4-step type random access and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then

17. The method according to any of claims 13-15, wherein if the first RO belongs to the RO for the 2-step type random access and the RO for the 2-step type random access is not shared with the RO for the 4-step type random access, then

18. The method according to any of claims 13-15, wherein if the first RO belongs to an RO shared by the 4-step type random access and the 2-step type random access, then

the third random access preamble is a random access preamble for indicating a 2-step type random access for a cell that does not support access to non-contiguous frequency domain resources.

19. The method of any of claims 13-15, wherein if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO for the 4-step type random access, and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then the method further comprises

20. The method of any of claims 13-15, wherein if the first random access preamble is further used to indicate that the terminal has the capability of supporting uplink coverage enhancement, and the first RO belongs to the RO for the 2-step type random access, and the RO for the 2-step type random access is not shared with the RO for the 4-step type random access, then the method further comprises

the fifth random access preamble is a random access preamble used for simultaneously indicating a cell which does not support accessing discontinuous frequency domain resources and a 2-step type random access which does not support uplink coverage enhancement.

21. The method according to any of claims 13-15, wherein if the first RO belongs to a RO shared by the 4-step type random access and the 2-step type random access, then

22. The method of any of claims 13-15, wherein 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 the RO for the 4-step type random access, and the RO for the 4-step type random access is not shared with the RO for the 2-step type random access, then the method further comprises

23. The method of any of claims 13-15, wherein 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 the RO for the 2-step random access type, and the RO for the 2-step random access type is not shared with the RO for the 4-step random access type, then

24. The method of any of claims 13-15, wherein 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 an RO shared by the 4-step type random access and 2-step type random access, then

25. An access capability indication apparatus, the apparatus comprising a processing unit and a communication unit, the processing unit configured to:

26. An access capability indication apparatus, the apparatus comprising a processing unit and a communication unit, the processing unit 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 in a random access process, where the first RO or the first random access preamble is used to indicate that a terminal has a capability of supporting a cell of discontinuous 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 it stores a computer program or instructions which, when executed by a 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 carry out the steps of the method according to any one of claims 1 to 12 or 13 to 24.

31. A chip module comprising a transceiver component 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 to 12 or 13 to 24.

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