CN117296430A

CN117296430A - Communication method, terminal, network device, medium, chip, product, and program

Info

Publication number: CN117296430A
Application number: CN202180097975.9A
Authority: CN
Inventors: 杜忠达
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2023-12-26
Also published as: WO2023010375A1

Abstract

The embodiment of the application provides a communication method, a terminal, a network device, a medium, a chip, a product and a program, wherein the method comprises the following steps: the terminal sends a first preamble to the network equipment; the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.

Description

Communication method, terminal, network device, medium, chip, product, and program

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a communication method, a terminal, network equipment, a medium, a chip, a product and a program.

Background

The random access procedure refers to a procedure before a terminal transmits a random access preamble to attempt access to a network and establishes a basic signaling connection with the network. The transmission of the preamble by the terminal to the network device is a critical step when the terminal initiates random access to the network device.

Disclosure of Invention

The embodiment of the application provides a communication method, a terminal, network equipment, a medium, a chip, a product and a program.

In a first aspect, an embodiment of the present application provides a communication method, including:

the terminal sends a first preamble to the network equipment;

the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.

In a second aspect, embodiments of the present application provide a communication method, where the method includes:

the network equipment receives a first preamble sent by a terminal;

In a third aspect, an embodiment of the present application provides a terminal, including:

a transceiver unit, configured to send a first preamble to a network device;

In a fourth aspect, embodiments of the present application provide a network device, including:

a receiving and transmitting unit, configured to receive a first preamble sent by a terminal;

In a fifth aspect, an embodiment of the present application provides a terminal, including: a memory and a processor, wherein the memory is configured to store,

the memory stores a computer program executable on a processor,

the processor implements the above method when executing the program.

In a sixth aspect, embodiments of the present application provide a network device, including: a memory and a processor, wherein the memory is configured to store,

the memory stores a computer program executable on a processor,

the processor implements the above method when executing the program.

In a seventh aspect, embodiments of the present application provide a computer storage medium storing one or more programs executable by one or more processors to implement the above-described methods.

In an eighth aspect, embodiments of the present application provide a chip, including: and a processor for calling and running the computer program from the memory, so that the device provided with the chip executes the method.

In a ninth aspect, embodiments of the present application provide a computer program product comprising a computer storage medium storing a computer program comprising instructions executable by at least one processor to implement the above-described method when the instructions are executed by the at least one processor.

In a tenth aspect, embodiments of the present application provide a computer program that causes a computer to execute the above method.

In this embodiment of the present application, since the index of the first preamble is located in a first index range, the first index range has a corresponding relationship with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO, so that the terminal can indicate a first random access trigger condition to the network device through the first index range where the index of the first preamble is located, so that the network device provides a service corresponding to the first random access trigger condition to the terminal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1a is a schematic diagram of an application scenario according to an embodiment of the present application;

fig. 1b is a schematic configuration diagram of an RO according to an embodiment of the present application;

fig. 2 is a schematic diagram of an RO sharing manner according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 4 is a schematic diagram of the positions of the index ranges corresponding to the trigger conditions a and C in the RO1 associated with the SSB1 according to the embodiment of the present application;

fig. 5 is a schematic diagram of association between RO and SSB according to an embodiment of the present application;

fig. 6 is a schematic diagram of the positions of index ranges corresponding to trigger conditions B and D in SSB 2-associated ROs according to an embodiment of the present application;

fig. 7 is a schematic structural composition diagram of a terminal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

Fig. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. The plurality or plurality of embodiments in the present application refer to at least two or at least two, respectively.

Fig. 1a is a schematic diagram of an application scenario in an embodiment of the present application.

As shown in fig. 1a, communication system 100 may include a terminal 110 and a network device 120. Network device 120 may communicate with terminal 110 over the air. Multi-service transmission is supported between the terminal 110 and the network device 120.

It should be understood that the present embodiments are illustrated by way of example only with respect to communication system 100, but the present embodiments are not limited thereto. That is, the technical solution of the embodiment of the present application may be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), internet of things (Internet of Things, ioT) systems, narrowband internet of things (Narrow Band Internet of Things, NB-IoT) systems, enhanced Machine-type-Type Communications (eMTC) systems, 5G communication systems (also referred to as New Radio (NR) communication systems), or future communication systems (e.g., 6G communication systems), and the like.

In the communication system 100 shown in fig. 1a, the network device 120 may be an access network device in communication with the terminal 110. The access network device may provide communication coverage for a particular geographic area and may communicate with terminals 110 (e.g., UEs) located within the coverage area.

The Terminal in the present application may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. The terminal may comprise one or a combination of at least two of the following: a server, a mobile phone, a tablet (Pad), a computer with a wireless transceiver function, a palm computer, a desktop computer, a personal digital assistant, a portable media player, a smart speaker, a navigation device, a smart watch, a smart glasses, a smart necklace or other wearable device, a pedometer, a digital TV, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned aerial vehicle (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and a car in a car networking system, a car-mounted device, a car-mounted module, a wireless modem (CPE), a handheld device (CPE), a customer terminal device (Customer Premise Equipment, a smart home appliance).

The network device in the embodiment of the application may include an access device and/or a core network device.

The access device may comprise one or a combination of at least two of the following: an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, a next generation radio access network (Next Generation Radio Access Network, NG RAN) device, a base station (gNB) in a NR system, a small station, a micro station, a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), an access point for Wireless-Fidelity (Wi-Fi), a transmission receiving point (transmission reception point, TRP), a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), and the like.

The core network device may be a 5G core (5G core,5 gc) device, which may comprise one or a combination of at least two of the following: an access and mobility management function (Access and Mobility Management Function, AMF), an authentication server function (Authentication Server Function, AUSF), a user plane function (User Plane Function, UPF), a session management function (Session Management Function, SMF), a location management function (Location Management Function, LMF). In other embodiments, the core network device may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, e.g., a session management function+a data gateway (Session Management Function + Core Packet Gateway, smf+pgw-C) device of the core network. It should be appreciated that SMF+PGW-C may perform the functions performed by both SMF and PGW-C. In the network evolution process, the core network device may also call other names, or form a new network entity by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication may also be achieved by establishing connections between various functional units in the communication system 100 through a next generation Network (NG) interface.

For example, the terminal establishes an air interface connection with the access network device through an NR interface, and is used for transmitting user plane data and control plane signaling; the terminal can establish control plane signaling connection with AMF through NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), can establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with AMF through NG interface 2 (N2 for short); the UPF can establish control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF can interact user plane data with the data network through an NG interface 6 (N6 for short); the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1a illustrates one base station, one core network device, and two terminals, alternatively, the wireless communication system 100 may include multiple base station devices and may include other numbers of terminals within the coverage area of each base station, which is not limited in this embodiment.

It should be noted that fig. 1a illustrates, by way of example, a system to which the present application is applicable, and of course, the method shown in the embodiments of the present application may be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. It should also be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication that there is an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. It should also be understood that, in the embodiments of the present application, reference to "corresponding" may mean that there is a direct correspondence or an indirect correspondence between the two, or may mean that there is an association between the two, or may be a relationship between an instruction and an indicated, configured, or the like. It should also be understood that references to "predefined", "protocol conventions", "predetermined" or "predefined rules" in embodiments of the present application may be implemented by pre-storing corresponding codes, tables or other means by which relevant information may be indicated in devices (e.g., including terminals and network devices), and the present application is not limited to a particular implementation thereof. Such as predefined may refer to what is defined in the protocol. It should also be understood that, in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which are not limited in this application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description is given of related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as an alternative, which all belong to the protection scope of the embodiments of the present application.

In the NR communication system, the terminal establishes, reestablishes or recovers an RRC link by a random access mode, or achieves the purposes of uplink synchronization and initialization of power control by a random access mode under the condition of the RRC link. In some embodiments, the network device needs to determine the reason for the terminal to send the random access, so as to achieve the purpose of access control or better complete the random access procedure, so as to provide a service matching the reason for the random access for the terminal.

The smallest unit of random access radio resources in the time-frequency domain is called a random access channel occasion (Physical Random Access Channel Occasion, RO), which in other embodiments may be called a physical random access channel occasion. Within one RO, 64 preambles (preambles) may be carried.

In an NR system, one radio frame is 10 ms long and comprises 10 subframes of 1 ms long, or two subframes or half-frames (half-frames), the first subframe is 5 ms long and comprises subframes #0 to #4, and the second subframe is 5 ms long and comprises subframes #5 to #9. The number of slots that a subframe contains is related to the subcarrier spacing (SCS) of this Carrier. The sub-carrier interval is 1 slot in one sub-frame of the 15KHz carrier, and the other sub-carrier intervals contain K slots, wherein K is equal to the ratio between the other sub-carrier intervals and 15 KHz. For example, when scs=120 KHz, one subframe may contain 8 slots. There are 14 symbols in total in one slot.

One RO may be several symbols in one slot in the time domain, i.e., one slot may contain a plurality of ROs; or spans several slots, i.e. several slots constitute one RO. One RO consists of several consecutive physical resource blocks (Physical Resource Block, PRB) in the frequency domain. The configuration of ROs within one radio frame is repeated in the time domain at a certain period. One RO may be continuous or discontinuous in the time domain and continuous in the frequency domain.

Fig. 1b is a schematic diagram of an RO configuration provided in this embodiment of the present application, as shown in fig. 1b, each gray square represents one RO, where there are two subframes (or slots in two subframes) in a radio frame, and there are 4 ROs in total in the frequency domain. The configuration of the RO is repeated in a period of one radio frame.

When a new random access trigger cause is introduced, two ways are generally used to configure the corresponding random access radio resources, one is to configure additional random access radio resources different from the original random access radio resources, and the other is to share part of the original random access radio resources.

Corresponding to the new random access trigger reason is an existing random access trigger reason, which is different from the existing random access trigger reason, and the existing random access trigger reason may be a random access trigger reason specified by a protocol before the application, for example, may be a random access trigger reason specified by a protocol carried in an access request in a case that the terminal sends the access request to the network device.

Wherein the new random access trigger cause may be at least one of: a random access cause triggered by small data transfer (small data transmission, SDT); coverage enhancement (Coverage enhancement, covEnh) triggered random access cause; -configuring a random access cause triggered by the user equipment (reduced capability UE, redcap); random access cause triggered by network Slicing (policing). In some embodiments, the provisioning user device may be referred to as a reduced capability user device.

In the case of configuring additional random access radio resources different from the original random access radio resources, resource utilization is low due to the need to reconfigure the random access radio resources.

On a certain carrier, when the number of ROs associated with one SSB is greater than 1, the current sharing manner may include the following three methods: sharing a certain RO; sharing even ROs; sharing an odd RO.

Fig. 2 is a schematic diagram of an RO sharing manner provided in the embodiment of the present application, as shown in fig. 2, there are two subframes in a radio frame, two SSBs associated with ROs on each subframe, that is, SSB1 and SSB2, and 4 ROs associated with SSB1 and SSB2 in each subframe, that is, ROs associated with SSB1 are dark squares in fig. 2, numbers 1, 2, 3, 4 in the frequency domain, ROs associated with SSB2 are light squares in fig. 2, and numbers 1, 2, 3, 4 in the frequency domain, respectively. Then in a shared manner, the sequence number of ROs that can be shared may be, for example, {1}, {2}, {3}, {4}, {1,3}, or {2,4}.

When SSB associated with one RO is greater than or equal to 1, the RO is shared in only one way, i.e., either all ROs are shared or none are shared.

The order of association between SSB and RO is: increment according to preamble index increment in the same RO; in the same time domain, increasing from low to high according to the position of the frequency domain; then increasing in sequence of RO in time domain in a physical random access channel (Physical Random Access Channel, PRACH) time slot (slot); increment between different PRACH slots.

The PRACH slot may include a slot of an RO. The number of ROs that one SSB can associate is 1, 2, 4, or 8. One RO associated SSB may be 1, 2, 4, 8 or 16, i.e. each SSB is assigned a preamble at one RO. The above association relationship between the SSB and the RO is performed according to the SSB cycle actually transmitted in the field, that is, the SSB sequence number is sequentially associated with the RO from small to large, after the SSB with the largest sequence number is finished, the association between the SSB with the smallest sequence number and the RO is started, and so on. All ROs associated with one SSB in such an SSB cycle are referred to as SSB-associated RO sets.

When introducing a new preamble range for a new random access trigger condition, in order to ensure backward compatibility, the existing preamble allocation mode needs to be reserved, that is, the new preamble allocation needs to be further divided in the reserved preamble in the current RO or needs to be performed in the newly allocated RO. In order to guarantee the allocation of random access radio resources while maintaining backward and forward compatibility, new solutions need to be introduced.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

Fig. 3 is a flow chart of a communication method provided in an embodiment of the present application, as shown in fig. 3, the method includes the following steps:

s301, a terminal sends a first preamble to network equipment; the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.

The index in the embodiments of the present application may also be referred to as index, number, etc. in other embodiments.

The terminal can firstly determine a first random access triggering condition; the first preamble is then transmitted to the network device. In some embodiments, the terminal may send an access request, for example, a random access Request (RA), to the network device, where the access request carries the first preamble.

The terminal may determine one or more synchronization signal blocks SSBs detected within a half radio frame (also known as a half frame) and then determine one or more ROs associated with the detected one or more SSBs; the terminal transmits a first preamble on the one or more ROs.

The index of the first preamble may be an index in an index range corresponding to the first RO. For example, in the case where the first RO includes one RO, the index range to which the first RO corresponds is 0 to 63. For another example, in the case where the first RO includes a plurality of ROs, the index range to which the first RO corresponds is a plurality of 0 to 63; the index of the first preamble may be an index of at least one of 0 to 63 among the plurality of 0 to 63.

The index of the first preamble may be one or more. For example, in the case where the index of the first preamble is one, the first index range includes one index, or the first index range includes a plurality of indexes. For another example, in the case where the index of the first preamble is 3, the first index range may be an index range corresponding to the 3 indexes (i.e., the index range corresponding to the 3 indexes is 4, and the index in the first index range is also 4), or the first index range may include an index range corresponding to the 3 indexes (i.e., the index range corresponding to the 3 indexes is 4, and the index in the first index range may be greater than 4).

In case that the terminal detects one SSB within a field, it may determine a first RO associated with the one SSB, and transmit a first preamble through the first RO. In case that the terminal detects a plurality of SSBs within a field, it may determine a first RO associated with the SSB having the strongest corresponding signal or greater than a threshold value, and transmit a first preamble through the first RO.

In this embodiment of the present application, the first RO may include one RO, or the first RO may include a plurality of ROs, or the first RO may include less than one RO, where the number of indexes in the index range corresponding to the less than one RO is less than 64. For example, less than one RO may comprise 1/2, 1/4, 1/8, or 1/16.

The index range corresponding to the first RO includes a reserved index range, and the first index range is in the reserved index range.

In some embodiments, one RO corresponds to an index range, or more than one RO corresponds to an index range, may include an allocated index range and a reserved index range. In other embodiments, one RO corresponds to an index range, or more than one RO corresponds to an index range, and may include only a reserved index range.

The allocated index range may be an index range that has been used in the protocol. For example, the allocated index range may be allocated to an already existing random access trigger condition. For example, an index range for which there is already a random access trigger condition correspondence may be in the allocated index range.

The reserved index range may be an unused index range in the protocol, that is, a reserved index range that is specified in the protocol before the application and is not currently used but reserved for a subsequent usable index range.

In some embodiments, the terminal receives first information sent by a network device; wherein the first information includes at least one of:

a first mapping relationship between one or more ROs and one or more random access trigger conditions;

a sequence of a plurality of random access trigger conditions mapped to one RO;

and the index range of the preamble corresponding to each random access triggering condition.

The first information may be included in information carried in one or more SSBs detected by the terminal. In some implementations, the first information may be included in a system message.

The mapping relationship between ROs and random access trigger conditions may comprise a one-to-one mapping, a one-to-many mapping, or a many-to-one mapping. The mapping in the embodiments of the present application may be understood as being associated with the same.

In the case where the plurality of random access trigger conditions includes a random access trigger condition a, a random access trigger condition B, a random access trigger condition C, and a random access trigger condition D, for example, the random access trigger conditions a to D may each be mapped on one RO; for another example, the random access trigger condition a and the random access trigger condition C are mapped on RO1, and the random access trigger condition B and the random access trigger condition D are mapped on RO 2; as another example, the random access trigger condition a may be mapped onto RO1 and onto RO 2. The mapping relation between other ROs and random access triggering conditions is not limited in this embodiment.

The earlier the sequence of random access trigger conditions, the earlier the index range corresponding to the random access trigger conditions. For example, in the case where a plurality of random access trigger conditions mapped to one RO, including a random access trigger condition a and a random access trigger condition C, the order of the random access trigger conditions a is forward, the index range corresponding to the random access trigger condition a is forward.

In some embodiments, in the index range corresponding to one RO, the preamble index ranges corresponding to different random access conditions may not overlap. In other embodiments, in the index ranges corresponding to different ROs, the preamble index ranges corresponding to different random access conditions may overlap, partially overlap, or not overlap. For example, the index range of the preamble corresponding to the random access trigger condition a may be a to B in the index range corresponding to RO1, and the index range corresponding to the random access trigger condition B may be a to B in the index range corresponding to RO 2; or, the index range of the preamble corresponding to the random access triggering condition B may be from C to D, where C is greater than B.

In some embodiments, the plurality of random access trigger conditions corresponds to the multi-segment preamble index range one-to-one;

the multi-segment preamble index range is continuous; or,

at least a portion of the preamble index range discontinuities exist in the multi-segment preamble index range.

In some embodiments, any two of the multi-segment preamble index ranges do not overlap.

In some embodiments, a multi-segment preamble index range may be determined for a plurality of random access trigger conditions of one RO, one-to-one correspondence with the plurality of random access trigger conditions.

For one RO corresponding index range, the multi-segment preamble index range is continuous, in which case the start index of the next preamble index range is the end index of the previous preamble index range plus one.

For an index range corresponding to one RO, at least part of the preamble index ranges in the multi-segment preamble index ranges are discontinuous, in which case, there is a case that a start index of a subsequent preamble index range may be an end index of a previous preamble index range plus N, where N is an integer greater than 1.

In some embodiments, the first random access includes at least one of:

small Data Transfer (SDT) triggered random access;

coverage enhancement (CovEnh) triggered random access;

a random access triggered by a user equipment (Redcap) is configured;

random access triggered by network Slicing (policing).

In some embodiments, the first random access trigger condition may include one or more random access trigger reasons, which may include at least one of: the random access trigger reason of SDT trigger, the random access trigger reason of CovEnh trigger, the random access trigger reason of Redcap trigger, the random access trigger reason of slice trigger.

In some embodiments, the first random access condition may be one of the four random access reasons described above. In other embodiments, the first random access condition may be a combination of at least two of the four random access reasons, and the first random access condition may include a random access trigger reason for a redcap+sdt trigger, or a random access trigger reason for a redcap+covenh trigger, or a random access trigger reason for a sdt+slicing trigger, or a random access trigger reason for a covenh+slicing trigger, or the like.

The UE may indicate SDT-triggered random access in the access request, e.g., in MSG1 or MSG3 of the established RRC connection procedure, the network device may then provide a small data transmission as part of the RRC connection message transmitted to the UE (e.g., in MSG4 of the established RRC connection procedure). The UE may receive the small data transmission and the network device may then either keep the established RRC connection to a certain time in case the UE needs to send an acknowledgement, or may release the RRC connection and return the UE to idle mode. The amount of data that may be included in a small data transmission may depend on the system configuration of the particular wireless communication system and the amount of data that may be included in the message payload used to transmit the small data transmission.

The base station classifies the coverage enhancement requirements into several levels, and configures different resources for Machine-type communication (MTC) devices of different coverage enhancement levels, the higher the coverage enhancement level. If a random access resource is configured for a UE of a certain coverage enhancement class, a physical broadcast channel (Physical Broadcast Channel, PBCH) information and a system information block (System Information Block, SIB for short) are sent by using the coverage enhancement technology corresponding to the class, and a data transmission resource is configured for a UE corresponding to the class.

The provisioned user equipment may also be referred to as an NR-lite or Redcap terminal. The main application scene of the profile user equipment is a factory sensor (sensor), a video acquisition device or a wearable device. For the former two device types, there is typically a large number of dense deployments in the network.

For example, one Redcap UE may trigger the random access procedure of the SDT, but because the preamble is only one, the preamble may indicate Redcap ue+sdt, so that the network device may derive two reasons, i.e., redcap ue+sdt, from the index range where the preamble corresponding to the first preamble is located.

In some embodiments, the network device may send configuration information corresponding to the first random access trigger condition to the terminal based on the received first random access trigger condition. The configuration information corresponding to different random access triggering conditions is different. The network device may send configuration information through Msg2, msg4, msg B, or other signaling.

In some embodiments, the first RO comprises at least one RO;

the index range corresponding to each RO of the at least one RO comprises an allocated index range and a reserved index range; or,

the index range corresponding to each RO of the at least one RO comprises a reserved index range; or,

the index range corresponding to each RO of a part of the at least two RO comprises a reserved index range, and the index range corresponding to each RO of the other part of the at least two RO comprises an allocated index range and a reserved index range;

wherein the first index range is within the reserved index range.

In other embodiments, the first RO may comprise less than one RO.

More than one RO may include an allocated index range and a reserved index range, or more than one RO may include a reserved index range.

The starting index of the first index range may be the same as or different from the starting index of the reserved index range. The number of indexes in the first index range is smaller than the number of indexes in the second index range.

In the case that the index range corresponding to one RO includes the allocated index range and the reserved index range, the index range corresponding to one RO is composed of the allocated index range and the reserved index range, the allocated index range precedes the reserved index range, and the allocated index range and the reserved index range are continuous, that is, the start index of the reserved index range is one-plus-one to the end index of the allocated index range.

In the case that the index range corresponding to one RO includes the reserved index range, the index range corresponding to one RO is the reserved index range.

In some embodiments, the method further comprises:

the terminal obtains an association relation; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame; the terminal determining the first RO of the one or more ROs associated with SSB detected within the half radio frame based on the association relationship; wherein the association relationship represents one of the following:

Correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.

In some embodiments, the terminal obtaining the association information may include: and the terminal receives the associated information sent by the network equipment. In other embodiments, the terminal obtaining the association information may include: the terminal obtains the association relationship from itself, for example, the terminal may configure the association relationship in advance.

The network equipment can support that a plurality of SSBs correspond to the same RO in the scene of fewer users so as to save PRACH resources; in a scenario with few users, one SSB may be supported for multiple ROs to provide sufficient PRACH capacity.

The association relationship may be referred to as association information. The association relationship may be included in information carried in one or more SSBs detected by the terminal. In some implementations, the first information may be included in a system message.

By the network device transmitting the association relation to the terminal, the terminal can be caused to determine the RO associated with each SSB based on each SSB detected, and the network device can also receive the first preamble at the location of the RO associated with each SSB.

In the case that the terminal detects a plurality of SSBs within a field, the terminal may determine a signal strength corresponding to each SSB and determine a first RO corresponding to the SSB having the strongest signal or having a signal greater than a threshold.

In some embodiments, the index range corresponding to the first RO includes a reserved index range; the method further comprises the steps of:

the terminal determines a second index range from the reserved index ranges;

wherein the second index range is less than or equal to the reserved index range; the first index range is within the second index range.

In some embodiments, the second index range may be smaller than the reserved index range, so that there may be other index ranges in the reserved index range besides the second index range, and other index ranges may be used in subsequent cases, for example, as the standard evolves further, other random access conditions may occur in later protocols, and these other random access conditions may be indicated using other index ranges.

In other embodiments, the second index range may be equal to the reserved index range such that the second index range is large enough to indicate a plurality of different random access trigger conditions.

In some embodiments, the method further comprises:

the terminal receives second information sent by the network equipment;

the second information includes or indicates: the starting index of the reserved index range and/or the starting index of the second index range.

The starting index of the second index range may be the same as the starting index of the reserved index range. For example, in the case where the start index of the reserved index range is 0, the start index of the second index range is also 0. For another example, when the start index of the reserved index range is m+1, M is one plus the end index of the allocated index range, and the start index of the second index range is also m+1.M is an integer greater than or equal to 1.

In the implementation process, the reserved index range and/or the second index range may be sent by the network device to the terminal. For example, the reserved index range and/or the second index range may be included in information carried in one or more SSBs detected by the terminal. In some embodiments, the reserved index range and/or the second index range may be included in a system message.

In some embodiments, the starting index of the reserved index range and/or the starting index of the second index range is the same as the starting index of the index range corresponding to the first RO; or,

and adding one to the end index of the allocated index range in the first RO by the start index of the reserved index range and/or the start index of the second index range.

In some embodiments, the method further comprises:

the terminal receives second information sent by the network equipment;

the second information includes or indicates: the end index of the second index range, and/or the number of indexes of the second index range.

The second information may be included in information carried in one or more SSBs detected by the terminal. In some implementations, the second information can be included in a system message.

In some implementations, the second information may also include or indicate a starting index of the second index range. For example, the second information may include or indicate at least two of: the end index of the second index range, the number of indexes of the second index range, and the start index of the second index range. So that the terminal can determine the second index range based on the second information.

In other embodiments, the starting index of the second index range may be determined by the terminal, for example, the terminal may determine the starting index of the second index range and increment the end index of the allocated index range in the first RO based on whether the allocated index range needs to be used or not, when the allocated index range needs to be used; and when the starting index of the second index range is not needed to be used, determining the starting index of the second index range, wherein the starting index of the second index range is the same as the starting index of the index range corresponding to the first RO. The terminal may also send a starting index of the determined second index range to the network device.

In some embodiments, the method further comprises:

the terminal determines the first index range from the second index range based on a random access mode corresponding to the first random access trigger condition, the grouping information of the first preamble and the first random access trigger condition;

wherein, the random access mode includes: a four-step random access mode or a two-step random access mode;

the packet information includes: group a or group B.

In practice, the determined first index range may be characterized by at least one of:

based on different random access trigger conditions, a first index range determined from the second index ranges is not overlapped;

based on different random access modes, a first index range determined from the second index ranges is not overlapped;

the first index ranges determined from the second index ranges do not overlap based on different grouping information.

In some embodiments, the determining, by the terminal, the first index range from the second index range based on the random access manner corresponding to the first random access trigger condition, the packet information of the first preamble, and the first random access trigger condition includes:

The terminal determines a third index range from the second index ranges based on the random access mode;

the terminal determines a fourth index range from the third index ranges based on the grouping information;

the terminal determines the first index range from the fourth index range based on the first random access trigger condition.

The third index range determined based on the four-step random access method and the third index range determined based on the two-step random access method constitute a second index range. The third index range determined based on the four-step random access manner may not overlap with the third index range determined based on the two-step random access manner. The third index range determined based on the four-step random access manner may precede or follow the third index range determined based on the two-step random access manner. In some embodiments, the number of indexes in the third index range determined based on the four-step random access manner may be greater than, less than, or equal to the number of indexes in the third index range determined based on the two-step random access manner.

In some implementations, the third index range may include only the fourth index range determined based on group a and the fourth index range determined based on group B. In other embodiments, the third index range may include not only the fourth index range determined based on group a, and the fourth index range determined based on group B, but also a free index range, which may be used to indicate other extended random access trigger conditions. For example, in the case where SDT, covEnh, redcap and one or more random access trigger conditions other than slicking are mentioned in the protocol after the present application, the index range corresponding to the one or more random access trigger conditions may be set in the idle index range.

The fourth index range determined based on group a may not overlap with the fourth index range determined based on group B. The fourth index range determined based on group a may be before or after the fourth index range determined based on group B. In some embodiments, the number of indices of the fourth index range determined based on group a may be greater than, less than, or equal to the number of indices of the fourth index range determined based on group B.

With the fourth index range determined based on group a, the fourth index range determined based on group B may be preceded by an example, e.g., the third index range may include, in order, the fourth index range determined based on group a, the free index range, the fourth index range determined based on group B; for another example, the third index range may include, in order, a fourth index range determined based on group a, a free index range, a fourth index range determined based on group B, a free index range. For another example, the third index range may include a fourth index range determined based on group a, a fourth index range determined based on group B, and a free index range in order.

In some embodiments, the fourth index range includes a plurality of index ranges in one-to-one correspondence with the plurality of random access trigger conditions. For example, in the case where the random trigger condition indicated in the first information includes P, the fourth index range may include P index ranges.

The number of indices in any two of the plurality of index ranges may be the same or the number of indices in at least two of the plurality of index ranges may be different.

In some embodiments, the number of indices of the fourth index range is less than or equal to one-half the number of indices of the third index range; the number of indexes of the fourth index range corresponding to the group a is the same as or different from the number of indexes of the fourth index range corresponding to the group B.

In some embodiments, the determining, by the terminal, the first index range from the fourth index range based on the first random access trigger condition includes:

the terminal determines the first index range corresponding to the first random access trigger condition from the fourth index range based on an order of one or more random access trigger conditions mapped to the first RO.

For example, in a case where the plurality of random access trigger conditions includes random access trigger conditions a to D, the first random access trigger condition is random access trigger condition B, and the fourth index range is 0 to 19, the fourth index range may be 5 to 9, or the fourth index range may be included in 5 to 9, for example, the fourth index range may be 5 to 7, or the fourth index range may be 8 to 9, or the fourth index range may be 7.

In some embodiments, the first random access trigger condition is included in a plurality of random access trigger conditions;

the plurality of random access triggering conditions are in one-to-one correspondence with a plurality of index ranges; the order in which the plurality of index ranges are mapped to the first RO is sequentially arranged within the fourth index range.

In some embodiments, the plurality of random access trigger conditions may be all random trigger conditions transmitted by the network device through the first information. In other embodiments, the plurality of random access trigger conditions may be partial random trigger conditions transmitted by the network device through the first information.

In some embodiments, the method further comprises:

the terminal receives third information sent by network equipment;

the third information includes or indicates:

the third index range corresponding to the four-step random access mode and/or the third index range corresponding to the two-step random access mode;

the fourth index range corresponding to the group a, and/or the fourth index range corresponding to the group B.

In some embodiments, the third index range and/or the fourth index range may be included in information carried in one or more SSBs detected by the terminal. In some implementations, the first information may be included in a system message.

In some embodiments, the first RO comprises at least one RO; the method further comprises the steps of:

in the case that SSBs are associated with ROs in a one-to-many or one-to-one ratio, the terminal determines the at least one RO corresponding to the detected SSB based on the detected SSB;

and the terminal determines the reserved index range from the index range corresponding to the at least one RO.

For example, in the case where the first RO includes RO1, the terminal may determine a reserved index range from the index ranges corresponding to RO1, determine a start position of the reserved index range from the index ranges corresponding to RO1, may be a start position of the index range corresponding to RO1, or may be an end index of the allocated index range corresponding to RO1 plus one.

For another example, in the case where the first RO includes RO1 and RO2, the terminal may determine a reserved index range from the index ranges corresponding to RO1, determine a start position of the reserved index range from the index ranges corresponding to RO1, and may be, for example, a start position of the index range corresponding to RO1, or may be an end index of the allocated index range corresponding to RO1 plus one; and/or the terminal may determine the reserved index range from the index ranges corresponding to RO2, and determine the start position of the reserved index range from the index ranges corresponding to RO1, for example, may be the start position of the index range corresponding to RO2, or may be the end index of the allocated index range corresponding to RO2 plus one.

If it is determined that the first trigger condition is mapped to RO1 based on the first information, the terminal may determine a reserved index range only from among index ranges corresponding to RO 1; if it is determined that the first trigger condition is mapped to RO2 based on the first information, the terminal may determine a reserved index range only from among index ranges corresponding to RO 2; if it is determined that the first trigger condition is mapped not only to RO1 but also to RO2 based on the first information, the terminal determines a reserved index range not only from the index ranges corresponding to RO1 but also from the index ranges corresponding to RO 2.

In some embodiments, the method further comprises:

in the case that SSBs are associated with ROs in a many-to-one ratio, the terminal determines a first RO corresponding to the detected plurality of SSBs based on the detected plurality of SSBs;

the terminal determines a sub-index range corresponding to a first SSB in the plurality of SSBs from the index ranges corresponding to the first RO;

and the terminal determines the reserved index range from the sub-index range.

The first SSB may be at least one SSB of a plurality of SSBs. For example, the first SSB may be an SSB having the highest signal strength among the plurality of SSBs, or the first SSB may be an SSB having a signal strength greater than a threshold among the plurality of SSBs.

In some implementations, the sub-index ranges may include reserved index ranges, or the sub-index ranges may include allocated index ranges and reserved index ranges.

In some embodiments, each of a plurality of sub-index ranges in one-to-one correspondence with the plurality of SSBs includes the reserved index range; the plurality of sub-index ranges are included in an index range corresponding to the first RO;

any two reserved index ranges are identical in position relative to the corresponding sub index ranges; or,

there are at least two of said reserved index ranges being different with respect to the position in the corresponding sub-index range.

Thus, the number of indexes in any two sub-index ranges among the plurality of sub-index ranges corresponding to the plurality of SSBs one to one may be the same.

In the case where the first sub-index range is 0 to 31 and the second sub-index range is 32 to 63, for example, the reserved index range in the first sub-index range may be 0 to 25 and the reserved index range in the second sub-index range may also be 32 to 47. For another example, the reserved index range in the first sub-index range may be 15 to 25, and the reserved index range in the second sub-index range may be 47 to 57. For another example, the reserved index range in the first sub-index range may be 0 to 25, and the reserved index range in the second sub-index range may be 40 to 60. Also for example, the reserved index range in the first sub-index range may be 15 to 25, and the reserved index range in the second sub-index range may be 32 to 57.

The following describes a communication method in the embodiment of the present application based on the angle of the network device:

the embodiment of the application provides a communication method, which comprises the following steps:

the network equipment receives a first preamble sent by a terminal;

In some embodiments, the method further comprises:

the network equipment sends first information to the terminal; wherein the first information includes at least one of:

a sequence of a plurality of random access trigger conditions mapped to one RO;

In some embodiments, the first random access includes at least one of:

random access triggered by small data transmission;

coverage enhanced triggered random access;

the random access triggered by the user equipment is simplified;

network slice triggered random access.

In some embodiments, the first RO comprises at least one RO;

wherein the first index range is within the reserved index range.

In some embodiments, the method further comprises:

the network equipment sends an association relation to the terminal; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame; wherein the association relationship represents one of the following:

correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.

In some embodiments, the index range corresponding to the first RO includes a reserved index range; the reserved index range comprises a second index range; the method further comprises the steps of:

The network device determines the first random access trigger condition based on a position of the first index range in the second index range.

In some embodiments, the method further comprises:

the network equipment sends second information to the terminal;

In some embodiments, the method further comprises:

the network equipment sends second information to the terminal;

In some embodiments, the network device determining the first random access trigger condition based on a position of the first index range in the second index range comprises:

The network equipment determines a random access mode corresponding to the first random access trigger condition, grouping information of the first preamble and the first random access trigger condition based on the position of the first index range in the second index range;

the packet information includes: group a or group B.

In some embodiments, the determining, by the network device, the random access manner corresponding to the first random access trigger condition, the packet information of the first preamble, and the first random access trigger condition based on the position of the first index range in the second index range includes:

the network device determining the first random access trigger condition based on the position of the first index range in a fourth index range;

the network device determining the grouping information based on the position of the fourth index range in the third index range;

the network device determines the random access mode based on the position of the third index range in the second index range.

In some embodiments, the network device determining the first random access trigger condition based on the location of the first index range in a fourth index range comprises:

the terminal determines the first random access trigger condition based on an order of one or more random access trigger conditions mapped to the first RO and a position of the first index range in a fourth index range.

In some embodiments, the method further comprises:

the network equipment sends third information to the terminal;

the third information includes or indicates:

in the case that SSBs are associated with ROs in a one-to-many or one-to-one ratio, the network device determines SSBs that the terminal can detect;

the network device determining the at least one RO corresponding to the detectable SSB;

the network device determines the reserved index range from the index range corresponding to the at least one RO.

In some embodiments, the method further comprises:

in the case that SSBs are associated with ROs in a many-to-one ratio, the network device determines a plurality of SSBs that the terminal can detect;

the network device determining the first RO corresponding to the detectable SSB;

the network device determines a first SSB associated with the first preamble based on the first index range and/or the second index range and the position of the network device in the index range corresponding to the first RO; the first SSB is included in the plurality of SSBs;

the reserved index range is included in a sub-index range corresponding to the first SSB.

The above description of the network device side method embodiment is similar to the description of the terminal side method embodiment described above, with similar advantageous effects as the terminal side method embodiment. For technical details not disclosed in the network device side method embodiment of the present application, please refer to the description of the terminal side method embodiment of the present application for understanding, or by reasoning about the terminal side method embodiment.

In the embodiment of the present application, a certain preamble (the sequence number ranges from R to r+s, and from R to r+s ranges from 0 to 63) in a certain RO needs to be allocated to 1 or more random access triggering conditions (e.g. a, B, C …). The result of the allocation is that when the UE triggers random access according to a certain trigger condition, the network device can uniquely find the specific range of the preamble in the RO according to the embodiment of the present application, so that the network device can determine the random access trigger condition according to the range of the preamble sent by the UE.

In the implementation process, the network device corresponding to the cell in which the terminal is located may configure the following parameters for each random access trigger condition through signaling:

(1) Parameters mapped to RO. Wherein this parameter determines the mapping between the random access trigger condition and the network configured RO. The RO configured by the network may be the original random access radio resource or the additional random access radio resource.

In the implementation process, the RO corresponding to the original random access wireless resource is the original RO, and the index range corresponding to the original RO comprises an allocated index range and a reserved index range; the starting index of the index range corresponding to the original RO may be different from the starting index of the reserved index range. The RO corresponding to the additional random access wireless resource is a new RO, and the index range corresponding to the new RO only comprises a reserved index range; the starting index of the index range corresponding to the new RO may be the same as the starting index of the reserved index range.

(2) The order mapped to the RO. For example, when there are a plurality of random access trigger conditions mapped to the same RO, the order between the random access trigger conditions is determined according to the configured order. For example, a SEQUENCE structure in the asn.1 syntax may be employed.

(3) The size of the allocated preamble. For example, the number of preambles allocated to a certain random access trigger condition.

If the mapped preamble ranges in the shared RO, the mapped preamble must be within the reserved preamble range. The shared RO may be an RO shared for use in a four-step random access scheme and a two-step random access scheme.

In some embodiments, if the random access trigger conditions a, B, C mapped to the same preamble range in the same RO allocate a, B, C for the number of preambles, and the index range of the preamble is { n, m }, where m > n, n > =0, m < =63. The ranges of the preamble allocated to the 3 random access trigger conditions a, B, C in the above manner are: { n, n+a-1}, { n+a, n+a+b-1}, { n+a+b, n+a+b+c-1}.

The communication method in the embodiment of the present application is described from at least three dimensions:

dimension 1: the mapped RO is an RO in the original random access radio resource configuration or a newly allocated RO.

Dimension 2: an SSB is associated with an RO greater than 1 or less than 1. In case of 1 or less, one or more SSBs may be associated in one RO.

Dimension 3: whether a certain random access trigger condition is configured with an RO of a 4-step RACH (i.e., the above-described four-step random access scheme), a RO of a 2-step RACH (i.e., the above-described two-step random access scheme), or both.

In an NR system, there may be a need to distinguish the following random access causes or a combination of the causes, to newly allocate random access radio resources: SDT (small packet send in INACTIVE state), covEnh, redcap, slicings. In addition to these four separate reasons, a terminal supporting these access reasons may trigger a random access procedure in the same random access for two or more reasons, such as redcap+sdt, redcap+covenh, sdt+slicings, covenh+s licing, etc. In the implementation process, the random access triggering conditions a, B, C and D are used to represent 4 random access reasons or combinations of reasons. The method itself may be applicable to more reasons or combinations of reasons.

Examples of several embodiments are described below:

in a first embodiment, the mapped RO is the original RO, the RO associated with 1 SSB is greater than 1 (e.g., the associated RO is 2), and both 4-step RACH and 2-step RACH resources are configured in the random access trigger condition.

The mapping relationship between the random access trigger condition A, B, C, D and the 2 ROs is shown in table 1:

TABLE 1

RO\trigger condition	A	B	C	D
RO 1	YES		YES
RO 2		YES		YES

As can be seen from table 1, trigger conditions a and C map into RO1, with trigger condition a preceding. Trigger conditions B and D map into RO2, and B is preceded.

Fig. 4 is a schematic diagram of the location of the index ranges corresponding to the trigger conditions a and C in the RO1 associated with the SSB1, where, as shown in fig. 4, the allocated preamble (preamble) indicates that the random access trigger conditions already exist in the original RO, for example, the random access trigger conditions already defined in the protocol before the application accessed through the 4-step RACH and/or the 2-step RACH. A preamble corresponding to SSB1 outside this (corresponding to the reserved index range) can theoretically be allocated to a new random access trigger condition, but a part of the preamble is reserved in the reserved index range as a further reserved preamble for e.g. collision-free random access procedures. The index range corresponding to SSB1 in fig. 4 may be followed by the index range corresponding to the reserved preamble. Wherein, the four-step random access preamble (4-step RACH preamble) and the two-step random access preamble (2-step RACH preamble) are preambles divided for the 4-step RACH and the 2-step RACH respectively.

The network may specify a range of preambles for the new allocation scheme (the range between the allocated preamble and the reserved preamble in fig. 4, corresponding to the second index range). If the starting preamble index of this range is the maximum index +1 of the allocated preamble, then the size of the section of preamble to be allocated is given. In fig. 4 the network needs configuration parameters to further distinguish between the 4-step RACH and the 2-step RACH and further groups a and B. Since in this embodiment, all the random access triggering conditions can initiate a random access procedure through the 4-step RACH or the 2-step RACH, it is necessary to divide the range between different random access triggering conditions according to the mapping relationship of table 1 in each group a or group B.

For example, in some embodiments, preambles within group a corresponding to the 4-step RACH of RO1 may be allocated to random access trigger conditions a and C according to the mapping relationship in table 1. In some implementations, to maintain forward compatibility, it is not necessary to assign all of the preambles in group a to a and C, but rather it may be allowed to reserve a portion, such as a preamble of a gray portion in the figure. This is to ensure forward compatibility. When new random access triggering conditions need to be added later, the new random access triggering conditions are added into the mapping table of the table 1, the specific number of preambles is configured, and then the new allocation can be completed according to the method of the invention.

After obtaining the second index range, the terminal determines whether to initiate the random access scheme of the 4-step RACH or the random access scheme of the 2-step RACH, as shown in fig. 4. After determining the random access mode, the packet information of the first preamble may be determined as group a or group B, and the terminal determines the random access trigger condition a or C when determining the packet information of the first preamble. For example, after the terminal obtains the second index range, the terminal determines a random access manner of initiating the 4-step RACH, determines packet information of the first preamble as group a, and determines a random access trigger condition a, so that the obtained first index range is a range corresponding to a in fig. 4.

In a second embodiment, the mapped RO is the original RO,1 SSB is associated with an RO greater than 1 (e.g., the associated RO is 2), and the 4/2-step RACH resources distinguish between different random access trigger conditions.

The random access triggering conditions a and B can only trigger the random access procedure through the 4-step RACH, while C and D can trigger the random access procedure through the 4-step RACH and the 2-step RACH, the mapping relationship can be performed according to table 2, and then the preamble areas where different triggering conditions can be allocated are:

TABLE 2

Random access mode/trigger condition	A	B	C	D
4-step RACH，group A	YES	YES	YES	YES
4-step RACH，group B	YES	YES	YES	YES
2-step RACH，group A			YES	YES
2-step RACH，group B			YES	YES

Wherein, the preamble range can be allocated for different triggering conditions.

In this embodiment, the first index range corresponding to random access trigger condition A or B is within the index range corresponding to 4-step RACH, but not within the index range corresponding to 2-step RACH. Reference may be made to the implementation details of the first embodiment for implementation details of the second embodiment.

In a third embodiment, the mapped RO is the original RO, the number of SSBs associated with 1 RO is greater than 1 (e.g., the number of associated SSBs is 2), and the 4/2-step RACH resources are indistinguishable.

Fig. 5 is a schematic diagram of association between RO and SSB according to an embodiment of the present application, where as shown in fig. 5, RO1 associates SSB1 with SSB2, SSB1 precedes SSB2, RO2 associates SSB3 with SSB4, and SSB3 precedes SSB 4.

Fig. 6 is a schematic diagram of the positions of the index ranges corresponding to the trigger conditions B and D in the RO associated with the SSB2, where, as shown in fig. 6, the terminal determines to send the first preamble in the index range corresponding to the SSB2 of the RO, the index range corresponding to the RO may be 0 to 63, and the index range corresponding to the SSB2 on the RO may be 32 to 63. The index range of the RO corresponding to SSB2 may be the second index range described above. The index range of the RO corresponding to SSB2 may sequentially include an index range corresponding to the allocated preamble, an index range corresponding to the four-step random access preamble (4-step RACH preamble), a two-step random access preamble (2-step RACH preamble), and an index range corresponding to the reserved preamble.

The index range corresponding to SSB2 in fig. 6 may be followed by the index range corresponding to the reserved preamble. Wherein 4-step RACH preamble, 2-step RACH preamble are preambles divided for 4-step RACH, 2-step RACH, respectively.

For example, after the terminal obtains the second index range, the terminal determines a random access manner of initiating the 4-step RACH, determines packet information of the first preamble as group a, and determines a random access trigger condition B, so that the obtained first index range is a range corresponding to B in fig. 6.

In fig. 6, the preamble corresponding to SSB1 and SSB2 obeys the same one parameter, so the ranges are the same. However, when a new allocation scheme is performed in the reserved preamble in SSB1, the parameters configured may or may not be the same as those configured when a new allocation scheme is performed in SSB 2. It can be said that the number of indexes of the index range corresponding to SSB1 may be the same as the number of indexes of the index range corresponding to SSB2 on one RO. However, the number of indices in the second, third, and third index ranges of the index ranges corresponding to SSB1 and the index ranges corresponding to trigger conditions B and/or C may be the same as or different from those in SSB 2.

Reference may be made to the implementation details of the first embodiment for implementation details of the third embodiment.

In a fourth embodiment, the mapped RO is a new RO, the RO associated with 1 SSB is greater than 1 (e.g., the associated RO is 2), and both 4-step RACH and 2-step RACH resources are configured in the random access trigger condition.

The difference compared to the first embodiment is that there is no "preamble allocated" in a new RO, since this is a new RO, which is not used for UEs that do not support the new random access trigger conditions. In addition, from the perspective of configuration parameters, since there are already existing configuration parameters for the partitioning between the 4-step RACH and the 2-step RACH, and between group a and group B, there is no need to configure new parameters to do this, that is, new RO resources can use the existing configuration format to do the partitioning between the 4-step RACH and the 2-step RACH, and between group a and group B for the preamble within the RO. Reference may be made to the implementation details of the first embodiment for implementation details of the fourth embodiment.

In a fifth embodiment, the mapped RO is a new RO, the RO associated with 1 SSB is greater than 1 (e.g. 2), the 4/2-step RACH resources distinguish between different random access trigger conditions, and the differences between the fourth embodiment and the first embodiment apply to the differences between the fifth embodiment and the second embodiment.

In a sixth embodiment, the mapped RO is a new RO, the number of SSBs associated with 1 RO is greater than 1 (e.g., the number of SSBs associated is 2)), the 4/2-step RACH resources are indistinguishable, RO1 is associated with SSB1 and SSB2, SSB1 precedes SSB2, RO2 is associated with SSB3 and SSB4, and SSB3 precedes SSB 4.

The difference between the fourth embodiment and the first embodiment is applicable to the difference between the sixth embodiment and the third embodiment.

In this embodiment of the present application, a mapping relationship is established between one or more random access triggering conditions and a preamble in a certain RO, where the preambles corresponding to each random access triggering condition are sequentially arranged in the preamble according to a mapping order.

The random access trigger condition refers to a certain reason or a combination of certain reasons that the UE triggers the random access. The random access triggering conditions for establishing a mapping relation between a section of preamble which is identical to a certain RO are arranged from low to high or from high to low in the range of the configured preamble according to the sequence of network configuration. The range of preambles corresponding to different random access trigger conditions may be arranged in a back-to-back manner.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein. For example, the various embodiments and/or technical features of the various embodiments described herein may be combined with any other of the prior art without conflict, and the combined technical solutions should also fall within the scope of protection of the present application.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiment of the present application, the terms "downstream", "upstream" and "sidestream" are used to indicate a transmission direction of signals or data, where "downstream" is used to indicate that the transmission direction of signals or data is a first direction from a station to a user equipment of a cell, "upstream" is used to indicate that the transmission direction of signals or data is a second direction from the user equipment of the cell to the station, and "sidestream" is used to indicate that the transmission direction of signals or data is a third direction from the user equipment 1 to the user equipment 2. For example, "downstream signal" means that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Fig. 7 is a schematic structural composition diagram of a terminal according to an embodiment of the present application, as shown in fig. 7, the terminal 700 includes: a transceiver unit 701, configured to send a first preamble to a network device;

In some embodiments, the transceiver unit 701 is further configured to receive first information sent by the network device; wherein the first information includes at least one of:

a sequence of a plurality of random access trigger conditions mapped to one RO;

In some embodiments, the plurality of random access trigger conditions corresponds to the multi-segment preamble index range one-to-one; wherein,

the multi-segment preamble index range is continuous; or,

In some embodiments, the first random access includes at least one of:

Random access triggered by small data transmission;

coverage enhanced triggered random access;

the random access triggered by the user equipment is simplified;

network slice triggered random access.

In some embodiments, the first RO comprises at least one RO;

wherein the first index range is within the reserved index range.

In some embodiments, the terminal further comprises: a determining unit 702, configured to obtain an association relationship; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame; determining the first RO of the one or more ROs associated with SSB detected within the half radio frame based on the association relationship; wherein the association relationship represents one of the following:

Correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.

In some embodiments, the index range corresponding to the first RO includes a reserved index range; a determining unit 702, configured to determine a second index range from the reserved index ranges;

In some embodiments, the transceiver unit 701 is further configured to receive second information sent by the network device;

In some embodiments, the determining unit 702 is further configured to determine the first index range from the second index range based on a random access manner corresponding to the first random access trigger condition, the packet information of the first preamble, and the first random access trigger condition;

the packet information includes: group a or group B.

In some embodiments, the determining unit 702 is further configured to determine a third index range from the second index ranges based on the random access manner; determining a fourth index range from the third index ranges based on the grouping information; the first index range is determined from the fourth index range based on the first random access trigger condition.

In some embodiments, the determining unit 702 is further configured to determine, from the fourth index ranges, the first index range corresponding to the first random access trigger condition based on an order of one or more random access trigger conditions mapped to the first RO.

In some embodiments, the transceiver unit 701 is further configured to receive third information sent by the network device;

the third information includes or indicates:

In some embodiments, the first RO comprises at least one RO; a determining unit 702 further configured to determine, based on the detected SSB, the at least one RO corresponding to the detected SSB, in a case where SSB and RO are associated in a one-to-many or one-to-one ratio; and determining the reserved index range from the index range corresponding to the at least one RO.

In some embodiments, the determining unit 702 determines, based on the detected plurality of SSBs, a first RO corresponding to the detected plurality of SSBs in a case where SSBs are associated with ROs in a many-to-one ratio; determining a sub-index range corresponding to a first SSB in the plurality of SSBs from the index ranges corresponding to the first RO; and determining the reserved index range from the sub-index range.

Fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application, as shown in fig. 8, where the network device 800 includes:

a transceiver 801, configured to receive a first preamble sent by a terminal;

In some embodiments, the transceiver unit 801 is further configured to send first information to the terminal; wherein the first information includes at least one of:

A sequence of a plurality of random access trigger conditions mapped to one RO;

the multi-segment preamble index range is continuous; or,

In some embodiments, the first random access includes at least one of:

random access triggered by small data transmission;

coverage enhanced triggered random access;

the random access triggered by the user equipment is simplified;

network slice triggered random access.

In some embodiments, the first RO comprises at least one RO;

Wherein the first index range is within the reserved index range.

In some embodiments, the transceiver unit 801 is further configured to send an association relationship to the terminal; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame; wherein the association relationship represents one of the following:

correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.

In some embodiments, the index range corresponding to the first RO includes a reserved index range; the reserved index range comprises a second index range; the network device 800 further comprises: a determining unit 802, configured to determine the first random access triggering condition based on a position of the first index range in the second index range.

In some embodiments, the transceiver unit 801 is further configured to send second information to the terminal;

In some embodiments, the determining unit 802 is further configured to determine, based on the position of the first index range in the second index range, a random access manner corresponding to the first random access trigger condition, packet information of the first preamble, and the first random access trigger condition;

the packet information includes: group a or group B.

In some embodiments, the determining unit 802 is further configured to determine the first random access trigger condition based on a position of the first index range in a fourth index range; determining the grouping information based on a position of the fourth index range in the third index range; and determining the random access mode based on the position of the third index range in the second index range.

In some embodiments, the determining unit 802 is further configured to determine the first random access trigger condition based on an order of one or more random access trigger conditions mapped to the first RO, and a position of the first index range in a fourth index range.

In some embodiments, the transceiver unit 801 is further configured to send third information to the terminal;

the third information includes or indicates:

In some embodiments, the first RO comprises at least one RO; a determining unit 802 further configured to determine an SSB that can be detected by the terminal, in a case where the SSB and the RO are associated in a one-to-many or one-to-one ratio; determining the at least one RO corresponding to the detectable SSB; and determining the reserved index range from the index range corresponding to the at least one RO.

In some embodiments, the determining unit 802 is further configured to determine a plurality of SSBs that can be detected by the terminal, where SSBs are associated with ROs in a many-to-one ratio; determining the first RO corresponding to the detectable SSB; determining a first SSB associated with the first preamble based on the first index range and/or the second index range at a position in the index range corresponding to the first RO; the first SSB is included in the plurality of SSBs; the reserved index range is included in a sub-index range corresponding to the first SSB.

Those skilled in the art will appreciate that the above description of the terminal and the network device according to the embodiments of the present application may be understood with reference to the description of the communication method according to the embodiments of the present application.

Fig. 9 is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device 900 may be a terminal or a network device. The communication device 900 shown in fig. 9 comprises a processor 901 and a memory 902, the memory 902 storing a computer program executable on the processor 901, the processor 901 implementing the communication method of any of the embodiments described above when executing the program.

For example, the processor 901 implements when executing the program:

transmitting a first preamble to the network device, or receiving the first preamble transmitted by the terminal;

The memory 902 may be a separate device independent of the processor 901, or may be integrated into the processor 901.

In some embodiments, as shown in fig. 9, the communication device 900 may further include a transceiver 903, and the processor 901 may control the transceiver 903 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 903 may include a transmitter and a receiver, among others. The transceiver 903 may further include antennas, the number of which may be one or more.

In some embodiments, the communication device 900 may be specifically a network device in the embodiments of the present application, and the communication device 900 may implement corresponding flows implemented by the network device in each method in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the communication device 900 may be a terminal in the embodiments of the present application, and the communication device 900 may implement a corresponding flow implemented by the terminal in each method in the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application may also provide a computer storage medium storing one or more programs executable by one or more processors to implement any of the above-described embodiments of the communication method.

For example, the one or more programs may be executed by one or more processors to implement:

Fig. 10 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1000 shown in fig. 10 includes a processor 1001, and the processor 1001 may call and execute a computer program from a memory to implement the method in the embodiment of the present application.

For example, the processor 1001 may call and run a computer program from memory to implement:

In some implementations, as shown in fig. 10, the chip 1000 may also include a memory 1002. Wherein the processor 1001 may call and run a computer program from the memory 1002 to implement the methods in the embodiments of the present application.

The memory 1002 may be a separate device from the processor 1001, or may be integrated in the processor 1001.

In some embodiments, the chip 1000 may also include an input interface 1003. The processor 1001 may control the input interface 1003 to communicate with other devices or chips, and specifically may acquire information or data sent by other devices or chips.

In some implementations, the chip 1000 may also include an output interface 1004. The processor 1001 may control the output interface 1004 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

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

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

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Embodiments of the present application may also provide a computer program product comprising a computer storage medium storing a computer program comprising instructions executable by at least one processor to implement any of the above-described embodiments of the communication method when the instructions are executed by the at least one processor.

For example, the instructions, when executed by the at least one processor, implement:

Embodiments of the present application may also provide a computer program that causes a computer to execute any of the communication methods of the embodiments described above.

For example, the computer program causes a computer to execute:

It should be noted that: the above description of the terminal, network device, computer storage medium, chip, computer program product, computer program embodiment is similar to the description of the method embodiment described above, with similar advantageous effects as the method embodiment. For technical details not disclosed in the terminals, network devices, computer storage media, chips, computer program products, computer program embodiments of the present application, please refer to the description of the method embodiments of the present application.

The processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor described above may include an integration of any one or more of the following: general purpose processors, application specific integrated circuits (Application Specific Integrated Circuit, ASIC), digital signal processors (Digital Signal Processor, DSP), digital signal processing devices (Digital Signal Processing Device, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field Programmable Gate Array, FPGA), central processing units (Central Processing Unit, CPU), graphics processors (Graphics Processing Unit, GPU), embedded neural network processors (neural-network processing units, NPU), controllers, microcontrollers, microprocessors, programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

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

It should be appreciated that the above-described memory computer storage medium is an exemplary but non-limiting illustration, and for example, the memory in the embodiments of the present application may also be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

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

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

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

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

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

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

The methods disclosed in the several method embodiments provided in the present application may be arbitrarily combined without collision to obtain a new method embodiment. The features disclosed in the several product embodiments provided in the present application may be combined arbitrarily without conflict to obtain new product embodiments. The features disclosed in the several method or apparatus embodiments provided in the present application may be arbitrarily combined without conflict to obtain new method embodiments or apparatus embodiments.

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

Claims

A method of communication, the method comprising:

the terminal sends a first preamble to the network equipment;

the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.
The method of claim 1, the method further comprising:

the terminal receives first information sent by network equipment; wherein the first information includes at least one of:

a first mapping relationship between one or more ROs and one or more random access trigger conditions;

a sequence of a plurality of random access trigger conditions mapped to one RO;

and the index range of the preamble corresponding to each random access triggering condition.
The method according to claim 1 or 2, wherein a plurality of random access trigger conditions are in one-to-one correspondence with a plurality of multi-segment preamble index ranges; wherein,

the multi-segment preamble index range is continuous; or,

at least a portion of the preamble index range discontinuities exist in the multi-segment preamble index range.
A method according to any of claims 1 to 3, the first random access comprising at least one of:

random access triggered by small data transmission;

coverage enhanced triggered random access;

reducing random access triggered by the capability profile user equipment;

network slice triggered random access.
The method of any one of claims 1 to 4, the first RO comprising at least one RO;

the index range corresponding to each RO of the at least one RO comprises an allocated index range and a reserved index range; or,

the index range corresponding to each RO of the at least one RO comprises a reserved index range; or,

the index range corresponding to each RO of a part of the at least two RO comprises a reserved index range, and the index range corresponding to each RO of the other part of the at least two RO comprises an allocated index range and a reserved index range;

wherein the first index range is within the reserved index range.
The method of any one of claims 1 to 5, further comprising:

the terminal obtains an association relation; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame;

the terminal determining the first RO of the one or more ROs associated with SSB detected within the half radio frame based on the association relationship;

wherein the association relationship represents one of the following:

correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.
The method of any of claims 1 to 6, wherein the index range corresponding to the first RO comprises a reserved index range; the method further comprises the steps of:

the terminal determines a second index range from the reserved index ranges;

wherein the second index range is less than or equal to the reserved index range; the first index range is within the second index range.
The method of claim 7, the method further comprising:

the terminal receives second information sent by the network equipment;

the second information includes or indicates: the starting index of the reserved index range and/or the starting index of the second index range.
The method according to claim 7 or 8, wherein the starting index of the reserved index range and/or the starting index of the second index range is the same as the starting index of the index range corresponding to the first RO; or,

and adding one to the end index of the allocated index range in the first RO by the start index of the reserved index range and/or the start index of the second index range.
The method of any one of claims 7 to 9, further comprising:

the terminal receives second information sent by the network equipment;

the second information includes or indicates: the end index of the second index range, and/or the number of indexes of the second index range.
The method according to any one of claims 7 to 10, further comprising:

the terminal determines the first index range from the second index range based on a random access mode corresponding to the first random access trigger condition, the grouping information of the first preamble and the first random access trigger condition;

wherein, the random access mode includes: a four-step random access mode or a two-step random access mode;

the packet information includes: group a or group B.
The method of claim 11, the determining, by the terminal, the first index range from the second index range based on a random access manner corresponding to the first random access trigger condition, the packet information of the first preamble, and the first random access trigger condition, comprising:

the terminal determines a third index range from the second index ranges based on the random access mode;

the terminal determines a fourth index range from the third index ranges based on the grouping information;

the terminal determines the first index range from the fourth index range based on the first random access trigger condition.
The method of claim 12, the terminal determining the first index range from the fourth index range based on the first random access trigger condition, comprising:

the terminal determines the first index range corresponding to the first random access trigger condition from the fourth index range based on an order of one or more random access trigger conditions mapped to the first RO.
The method according to claim 12 or 13, the first random access trigger condition being comprised in a plurality of random access trigger conditions;

The plurality of random access triggering conditions are in one-to-one correspondence with a plurality of index ranges; the order in which the plurality of index ranges are mapped to the first RO is sequentially arranged within the fourth index range.
The method of any one of claims 12 to 14, further comprising:

the terminal receives third information sent by network equipment;

the third information includes or indicates:

the third index range corresponding to the four-step random access mode and/or the third index range corresponding to the two-step random access mode;

the fourth index range corresponding to the group a, and/or the fourth index range corresponding to the group B.
The method of any one of claims 7 to 15, the first RO comprising at least one RO; the method further comprises the steps of:

in the case that SSBs are associated with ROs in a one-to-many or one-to-one ratio, the terminal determines the at least one RO corresponding to the detected SSB based on the detected SSB;

and the terminal determines the reserved index range from the index range corresponding to the at least one RO.
The method of any one of claims 7 to 16, further comprising:

In the case that SSBs are associated with ROs in a many-to-one ratio, the terminal determines a first RO corresponding to the detected plurality of SSBs based on the detected plurality of SSBs;

the terminal determines a sub-index range corresponding to a first SSB in the plurality of SSBs from the index ranges corresponding to the first RO;

and the terminal determines the reserved index range from the sub-index range.
The method of claim 17, each sub-index range of a plurality of sub-index ranges that are one-to-one corresponding to the plurality of SSBs comprising the reserved index range; the plurality of sub-index ranges are included in an index range corresponding to the first RO;

any two reserved index ranges are identical in position relative to the corresponding sub index ranges; or,

there are at least two of said reserved index ranges being different with respect to the position in the corresponding sub-index range.
A method of communication, the method comprising:

the network equipment receives a first preamble sent by a terminal;

the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.
The method of claim 19, the method further comprising:

the network equipment sends first information to the terminal; wherein the first information includes at least one of:

a first mapping relationship between one or more ROs and one or more random access trigger conditions;

a sequence of a plurality of random access trigger conditions mapped to one RO;

and the index range of the preamble corresponding to each random access triggering condition.
The method of claim 19 or 20, wherein a plurality of random access trigger conditions are in one-to-one correspondence with a plurality of multi-segment preamble index ranges; wherein,

the multi-segment preamble index range is continuous; or,

at least a portion of the preamble index range discontinuities exist in the multi-segment preamble index range.
The method of any of claims 19 to 21, the first random access comprising at least one of:

random access triggered by small data transmission;

coverage enhanced triggered random access;

the random access triggered by the user equipment is simplified;

network slice triggered random access.
The method of any one of claims 19 to 22, the first RO comprising at least one RO;

the index range corresponding to each RO of the at least one RO comprises an allocated index range and a reserved index range; or,

The index range corresponding to each RO of the at least one RO comprises a reserved index range; or,

the index range corresponding to each RO of a part of the at least two RO comprises a reserved index range, and the index range corresponding to each RO of the other part of the at least two RO comprises an allocated index range and a reserved index range;

wherein the first index range is within the reserved index range.
The method of any one of claims 19 to 23, further comprising:

the network equipment sends an association relation to the terminal; the association relationship indicates: association of one or more ROs with one or more synchronization signal blocks SSB broadcast by an network device within a half radio frame; wherein the association relationship represents one of the following:

correlating in a one-to-one ratio;

correlating in a many-to-one ratio;

the correlation is in one-to-many ratio.
The method of any of claims 19 to 24, the index range to which the first RO corresponds comprising a reserved index range; the reserved index range comprises a second index range; the method further comprises the steps of:

the network device determines the first random access trigger condition based on a position of the first index range in the second index range.
The method of claim 25, the method further comprising:

the network equipment sends second information to the terminal;

the second information includes or indicates: the starting index of the reserved index range and/or the starting index of the second index range.
The method according to claim 25 or 26, wherein the starting index of the reserved index range and/or the starting index of the second index range is the same as the starting index of the index range corresponding to the first RO; or,

and adding one to the end index of the allocated index range in the first RO by the start index of the reserved index range and/or the start index of the second index range.
The method of any one of claims 25 to 27, further comprising:

the network equipment sends second information to the terminal;

the second information includes or indicates: the end index of the second index range, and/or the number of indexes of the second index range.
The method of any of claims 25 to 28, the network device determining the first random access trigger condition based on a position of the first index range in the second index range, comprising:

The network equipment determines a random access mode corresponding to the first random access trigger condition, grouping information of the first preamble and the first random access trigger condition based on the position of the first index range in the second index range;

wherein, the random access mode includes: a four-step random access mode or a two-step random access mode;

the packet information includes: group a or group B.
The method of claim 29, the network device determining a random access manner corresponding to the first random access trigger condition, packet information of the first preamble, and the first random access trigger condition based on a position of the first index range in the second index range, comprising:

the network device determining the first random access trigger condition based on the position of the first index range in a fourth index range;

the network device determining the grouping information based on the position of the fourth index range in the third index range;

the network device determines the random access mode based on the position of the third index range in the second index range.
The method of claim 30, the network device determining the first random access trigger condition based on a position of the first index range in a fourth index range, comprising:

the terminal determines the first random access trigger condition based on an order of one or more random access trigger conditions mapped to the first RO and a position of the first index range in a fourth index range.
The method according to claim 30 or 31, the first random access trigger condition being comprised in a plurality of random access trigger conditions;

the plurality of random access triggering conditions are in one-to-one correspondence with a plurality of index ranges; the order in which the plurality of index ranges are mapped to the first RO is sequentially arranged within the fourth index range.
The method of any one of claims 30 to 32, further comprising:

the network equipment sends third information to the terminal;

the third information includes or indicates:

the third index range corresponding to the four-step random access mode and/or the third index range corresponding to the two-step random access mode;

the fourth index range corresponding to the group a, and/or the fourth index range corresponding to the group B.
The method of any one of claims 25 to 33, the first RO comprising at least one RO; the method further comprises the steps of:

in the case that SSBs are associated with ROs in a one-to-many or one-to-one ratio, the network device determines SSBs that the terminal can detect;

the network device determining the at least one RO corresponding to the detectable SSB;

the network device determines the reserved index range from the index range corresponding to the at least one RO.
The method of any one of claims 23 to 34, further comprising:

in the case that SSBs are associated with ROs in a many-to-one ratio, the network device determines a plurality of SSBs that the terminal can detect;

the network device determining the first RO corresponding to the detectable SSB;

the network device determines a first SSB associated with the first preamble based on the first index range and/or the second index range and the position of the network device in the index range corresponding to the first RO; the first SSB is included in the plurality of SSBs;

the reserved index range is included in a sub-index range corresponding to the first SSB.
The method of claim 35, each sub-index range of a plurality of sub-index ranges that are one-to-one corresponding to the plurality of SSBs comprising the reserved index range; the plurality of sub-index ranges are included in an index range corresponding to the first RO;

any two reserved index ranges are identical in position relative to the corresponding sub index ranges; or,

there are at least two of said reserved index ranges being different with respect to the position in the corresponding sub-index range.
A terminal, comprising:

a transceiver unit, configured to send a first preamble to a network device;

the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.
A network device, comprising:

a receiving and transmitting unit, configured to receive a first preamble sent by a terminal;

the index of the first preamble is located in a first index range, and the first index range has a corresponding relation with a first random access triggering condition; the first index range is within an index range corresponding to the first random access channel opportunity RO.
A terminal, comprising: a memory and a processor, wherein the memory is configured to store,

the memory stores a computer program executable on a processor,

the processor implementing the method of any one of claims 1 to 18 when executing the program.
A network device, comprising: a memory and a processor, wherein the memory is configured to store,

the memory stores a computer program executable on a processor,

the processor implementing the method of any of claims 19 to 36 when executing the program.
A computer storage medium storing one or more programs executable by one or more processors to implement the method of any of claims 1 to 18; or,

the one or more programs may be executed by one or more processors to implement the method of any of claims 19 to 36.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 18; or,

causing a device on which the chip is mounted to perform the method of any one of claims 19 to 36.
A computer program product comprising a computer storage medium storing a computer program comprising instructions executable by at least one processor, the instructions when executed by the at least one processor implementing the method of any one of claims 1 to 18; or,

the method of any one of claims 19 to 36 being implemented when the instructions are executed by the at least one processor.
A computer program which causes a computer to perform the method of any one of claims 1 to 18; or,

the computer program causing a computer to perform the method of any one of claims 19 to 36.