WO2020220894A1

WO2020220894A1 - Prach resource configuration and indication configuration method, apparatus, and device

Info

Publication number: WO2020220894A1
Application number: PCT/CN2020/081863
Authority: WO
Inventors: 缪德山; 康绍莉; 孙韶辉
Original assignee: 大唐移动通信设备有限公司
Priority date: 2019-04-30
Filing date: 2020-03-27
Publication date: 2020-11-05
Also published as: CN111867084A; CN111867084B; CN116367326A

Abstract

Provided are a physical random access channel (PRACH) resource configuration and indication configuration method, apparatus, and device, used for solving the problem that there are no different PRACH resources defined for a terminal. The method comprises: when the terminal performs random access, determining at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets configured for different types of terminals; and selecting a PRACH resource from the determined PRACH resource set. A network side configures the at least two PRACH resource sets according to different terminal types, and indicates PRACH resource set configuration for the terminal, and thus, the terminal is used for performing random access subsequent to an initial access phase or an RRC connection.

Description

Method, device and equipment for PRACH resource configuration and indicating configuration

Cross references to related applications

This disclosure requires the priority of a Chinese patent application filed with the Chinese Patent Office on April 30, 2019, the application number is 201910364628.2, and the application name is "a method, device and equipment for PRACH resource configuration and instruction configuration", and its entire contents Incorporated in this disclosure by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to a method, device and device for PRACH resource configuration and indication configuration.

Background technique

Physical Random Access Channel (PRACH) is the access channel for the user terminal (User equipment, UE) to initiate a call at the beginning. When the UE initially accesses, it will send it on the PRACH channel according to the information indicated by the base station A radio resource control (Radio Resource Control, RRC) connection establishment request message is used to establish an RRC connection. PRACH is the only way for users to perform initial connection, handover, connection re-establishment, and re-uplink synchronization. The UE uses PRACH to achieve uplink access and synchronization with the Long Term Evolution (LTE) system.

In LTE or New Radio (NR) system design, multiple PRACH formats are defined. Table 1 and Table 2 show multiple PRACH formats defined by the fifth-generation (5th-generation, 5G) NR. wherein, L _RA Preamble identifier sequence length, Δf ^RA represents the subcarrier spacing, N _u denotes a sequence parameter Preamble, the Preamble sequence occupies an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols associated with,

For Cyclic Prefix (CP) parameters, TypeA and TypeB indicate the rules for designing the Preamble sequence:

Table 1

Table 2

Among the above different PRACH formats, the PRACH format is determined by the CP length, the length of the Preamble sequence, and the number of repetitions. The long PRACH format can be used in scenarios with large coverage, and the short PRACH format is used in scenarios with a small cell radius.

For the PRACH format of the same length, different subcarrier intervals of the Preamble sequence are used for different Doppler frequency shift scenarios, a large subcarrier interval is suitable for Doppler frequency shift, and a small subcarrier interval is used for small Doppler frequency shifts. For low frequency deviation, a large Doppler configuration is also required for high frequency scenes.

In satellite communication, the types of terminals are quite different, and the PRACH format designed by the current LTE or 5G NR system cannot meet the communication requirements of relatively different terminal types in satellite communication scenarios.

Summary of the invention

The embodiments of the present disclosure provide a method, device, and device for PRACH resource configuration and indication configuration to solve the problem that in the current technology, different PRACH resources are not defined for the terminal, which is not conducive to the flexibility and efficiency optimization of resource allocation.

In the first aspect, the embodiments of the present disclosure provide a PRACH resource configuration method applied to a terminal, including:

When performing random access, it is determined that among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the type of the terminal, where different PRACH resource sets are different from different ones PRACH format one-to-one correspondence;

Select a PRACH resource from the determined at least one PRACH resource set.

In a possible implementation manner, determining to perform random access includes:

In the initial access phase, determine to perform random access; or

After establishing a radio resource control RRC connection, when the conditions for performing random access are met, it is determined to perform random access.

In a possible implementation manner, it is determined that among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the terminal type includes:

Acquiring at least one PRACH resource set corresponding to the terminal type among at least two PRACH resource sets configured for different terminal types indicated by the network side; or

Determine at least two PRACH resource sets configured for different terminal types, and select at least one PRACH resource set corresponding to the terminal type from the at least two PRACH resource sets.

In a possible implementation manner, determining at least two PRACH resource sets configured for different terminal types includes:

Through downlink broadcast signaling on the network side, receiving at least two physical random access channel PRACH resource sets configured for different terminal types indicated by the network side; or

By means of agreement, determine at least two physical random access channel PRACH resource sets configured for different terminal types.

In a possible implementation, the selection of PRACH resources includes:

In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or

After the RRC connection is established, in at least one PRACH resource set corresponding to the type of the terminal, a designated PRACH resource is selected according to an instruction of the network.

In a possible implementation manner, the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

In a possible implementation manner, the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.

In the second aspect, embodiments of the present disclosure provide a PRACH resource indication configuration method, which is applied to the network side, and includes:

According to different terminal types, configure at least two PRACH resource sets, configure at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponds to the type of terminal, and different PRACH resource sets have different PRACH formats One-to-one correspondence

Indicate the PRACH resource set configuration to the terminal, so that the terminal is used for initial access phase or random access after the RRC connection.

In a possible implementation manner, indicating the PRACH resource set configuration to the terminal includes:

Determine at least one PRACH resource set corresponding to the type of terminal among at least two PRACH resource sets configured for different terminal types, and indicate to the terminal; or

Through downlink broadcast signaling, at least two PRACH resource sets configured for different terminal types are indicated to the terminal.

Determine at least two PRACH resource sets configured for different terminal types by means of agreement.

In a possible implementation manner, determining at least one PRACH resource set corresponding to the type of the terminal among the at least two PRACH resource sets configured for different terminal types and indicating to the terminal includes:

By reporting the type of the terminal, the network side indicates the set of PRACH resources of the terminal and allocates PRACH resources for the terminal.

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

In a possible implementation manner, the PRACH resource set configuration of different terminal types is determined according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

In the third aspect, embodiments of the present disclosure provide a terminal for PRACH resource configuration, including:

Processor, memory and communication interface;

Wherein, the memory stores instructions that can be executed by the processor;

When the processor executes the instruction, it is used to:

Select a PRACH resource from the determined at least one PRACH resource set.

In a possible implementation manner, when the processor executes the instruction, it is specifically configured to:

In the initial access phase, determine to perform random access; or

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

In a fourth aspect, embodiments of the present disclosure provide a network-side device for PRACH resource indication configuration, including:

Processor, memory and communication interface;

Wherein, the memory stores instructions that can be executed by the processor;

When the processor executes the instruction, it is used to:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

In the fifth aspect, embodiments of the present disclosure provide a PRACH resource configuration device, including:

The PRACH resource set determining unit is configured to determine at least one PRACH resource set corresponding to the type of the terminal among at least two physical random access channel PRACH resource sets configured for different terminal types when performing random access, wherein: Different PRACH resource sets have a one-to-one correspondence with different PRACH formats;

The PRACH resource selection unit is configured to select PRACH resources from the determined at least one PRACH resource set.

In a possible implementation manner, the PRACH resource set determining unit is specifically configured to:

In the initial access phase, determine to perform random access; or

In a possible implementation manner, the PRACH resource selection unit is specifically configured to:

In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the terminal type; or

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

In a sixth aspect, embodiments of the present disclosure provide a PRACH resource indication configuration device, including:

The PRACH resource set configuration unit is used to configure at least two PRACH resource sets according to different terminal types. Among the at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponds to the type of the terminal. The PRACH resource set has a one-to-one correspondence with different PRACH formats;

The PRACH resource set indication unit is used to indicate the PRACH resource set configuration to the terminal, so that the terminal is used for the initial access phase or random access after the RRC connection.

In a possible implementation manner, the PRACH resource set indication unit is specifically configured to:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

Determine the PRACH resource set configuration for different terminal types according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

In a seventh aspect, an embodiment of the present disclosure provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer executes the first aspect of the embodiments of the present disclosure Or the method described in the second aspect.

One or more technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages:

The present disclosure configures at least two PRACH resource sets for different terminal types, so that different types of terminals can use resources in different PRACH resource sets, because different PRACH resource sets correspond to different PRACH parameters and can be customized for specific terminal types The modernized design is beneficial to improve the efficiency and flexibility of PRACH resource configuration, and prevents a set of PRACH resources from being applied to all terminals, resulting in an increase in system design complexity and a decrease in efficiency.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings may be obtained from these drawings without creative labor.

FIG. 1 is a schematic diagram of a PRACH resource configuration system provided in Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a PRACH resource configuration and a method for indicating configuration according to the second embodiment of the disclosure;

FIG. 3A is a schematic diagram of a PRACH format provided in the second embodiment of the disclosure;

FIG. 3B is a schematic diagram of a PRACH format provided in the second embodiment of the disclosure;

4 is a schematic diagram of a PRACH resource configuration and a method for indicating configuration provided in Embodiment 3 of the disclosure;

FIG. 5 is a schematic diagram of a PRACH resource configuration method provided in the fourth embodiment of the disclosure;

6 is a schematic diagram of a PRACH resource indication configuration method provided in the fourth embodiment of the disclosure;

FIG. 7 is a schematic structural diagram of a terminal for PRACH resource configuration provided by Embodiment 5 of the present disclosure;

FIG. 8 is a schematic structural diagram of a network-side device for PRACH resource indication configuration provided by Embodiment 5 of the present disclosure;

FIG. 9 is a schematic structural diagram of a PRACH resource configuration device provided by Embodiment 6 of the present disclosure;

FIG. 10 is a schematic structural diagram of a PRACH resource indication configuration device provided by Embodiment 6 of the present disclosure.

Detailed ways

The following describes the technical solutions of the present disclosure in detail through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present disclosure, rather than limiting the technical solutions of the present disclosure. In the case of no conflict, the embodiments of the present disclosure and the technical features in the embodiments can be combined with each other.

It should be understood that in the description of the embodiments of the present disclosure, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating Or imply the order. In the description of the embodiments of the present disclosure, "plurality" refers to two or more.

The term "and/or" in the embodiments of the present disclosure is merely an association relationship describing associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean that there is A alone, and both A and B, there are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

The embodiments of the present disclosure can be applied to fifth-generation (5th-generation, 5G) systems; and can also be applied to other wireless communication systems, such as Long Term Evolution (LTE) systems, and Global System for Mobile communication systems. Communication, GSM), mobile communication system (Universal Mobile Telecommunications System, UMTS), Code Division Multiple Access (CDMA) system, and new network equipment systems.

The User Equipment (UE) involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. A wireless user terminal can communicate with one or more core networks via a radio access network (RAN). The wireless user terminal can be a mobile terminal, such as a mobile phone (or “cellular” phone) and a mobile terminal. The computer, for example, may be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device, which exchanges language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (Personal Digital Assistant, PDA) and other equipment. Wireless user terminal can also be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (Mobile), remote station (Remote Station), access point (Access Point) , Remote Terminal (Remote Terminal), Access Terminal (Access Terminal), User Terminal (User Terminal), User Agent (User Agent), User Terminal (User Device).

The base station involved in the embodiments of the present disclosure can be used to convert the received air frame and Internet Protocol (IP) packets to each other, and serve as a router between the wireless terminal device and the rest of the access network, where the access The rest of the net can include IP network equipment. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a network device in a 5G system, such as a next generation Node B (gNB), or a Global System for Mobile Communication (GSM) or Code Division Multiple Access (Code Division Multiple Access). The base station (Base Transceiver Station, BTS) in Access, CDMA, can also be the base station (NodeB) in Wideband Code Division Multiple Access (WCDMA), or the evolutional base station (evolutional) in LTE Node B, eNB or e-NodeB), the embodiment of the present disclosure is not limited.

In the design of LTE and 5G NR systems, a variety of PRACH channel formats are defined and applied to different scenarios.

The existing LTE or NR systems do not define different PRACH formats for different terminals. Therefore, different PRACH formats cannot be customized for terminals during initial access. In satellite communication systems, the radius of a cell is usually large and the types of terminals There are also many, such as handheld terminals, vehicle-mounted terminals, and airplanes. Since the types of terminals in the satellite system are too different, if only one PRACH channel format is configured, it is not conducive to the optimization of the flexibility and efficiency of system resource allocation.

The moving speed of the terminal is an important factor that affects the design of the PRACH format. A larger moving speed will result in a larger Doppler shift, which requires a larger subcarrier spacing. For handheld or vehicle-mounted terminals, the terminal moving speed is not particularly fast. Because the Doppler frequency shift is relatively small, the sub-carrier spacing of PRACH can be configured to be smaller; for high-speed terminals such as airplanes or high-speed trains, the moving speed is relatively low. Fast. Because the transmission power is not limited, the PRACH transmission bandwidth can be configured larger. At the same time, due to the larger Doppler shift, the subcarrier spacing needs to be configured larger.

At the same time, since different terminals have different transmission power capabilities, the greater the transmission power, the larger the PRACH transmission bandwidth can be supported. The smaller the transmission power is, the PRACH resource set with more preamble repetition times needs to be selected first to increase the probability of successful connection; the larger the transmission bandwidth supported, the longer the length of the preamble sequence is supported.

Based on this situation, for different types of terminals, different PRACH formats need to be configured to support random access of the terminals. But at the time of initial access, the network does not know the type of the terminal, so the terminal needs to select the appropriate PRACH resource to access the network according to its own terminal type.

Based on the foregoing problems, the embodiments of the present disclosure propose a PRACH resource configuration and a method for indicating configuration, which can support different types of terminals to select appropriate PRACH resources to access the network, and improve the flexibility and efficiency of the system.

The embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings of the specification.

Example one

Referring to FIG. 1, an embodiment of the present disclosure provides a PRACH resource configuration system. The system includes a network-side device 101 and a terminal 102, where:

The network side device 101 is configured to configure at least two PRACH resource sets according to different terminal types, and configure at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponding to the terminal type, and different PRACH resources The set has a one-to-one correspondence with different PRACH formats; indicates the PRACH resource set configuration to the terminal, so that the terminal is used for the initial access phase or random access after the RRC connection;

The terminal 102 is configured to determine at least one PRACH resource set corresponding to the terminal type in at least two physical random access channel PRACH resource sets configured for different terminal types when performing random access, wherein the different PRACH resources The set corresponds to different PRACH formats one-to-one; from the determined at least one PRACH resource set, a PRACH resource is selected.

Different PRACH resource sets have a one-to-one correspondence with different PRACH formats, which means that a PRACH resource set uniquely corresponds to one PRACH format. A PRACH resource set includes multiple different PRACH resources using the PRACH format, and different PRACH resources use the same PRACH format , Differentiating resources through different content elements, such as different random access preambles. The embodiments of the present disclosure may define different random access preamble or cyclic prefix CP for each PRACH resource set.

The components of the PRACH format include a cyclic prefix CP, a preamble sequence, and a guard interval (Guard Time, GT). The CP length, the length of the preamble sequence and the number of repetitions, and the subcarrier interval are used as parameters to describe the PRACH format. Different PRACHs in the embodiments of the present disclosure Format refers to multiple PRACH formats with different parameters in any one or more of the foregoing.

As an optional implementation manner, the aforementioned different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

As an optional implementation manner, the foregoing different terminal types include any one or more of the following:

Different terminal levels;

Different terminal capabilities.

The level of the terminal can be defined by the level parameter of the terminal. For example, the terminal can be defined by parameters such as mobile characteristics or terminal power.

The capability of the terminal can be defined by the capability parameter of the terminal. For example, the effective global radiated power equivalent isotropically radiated power (EIRP) and the transmission bandwidth of the terminal can be transmitted through the terminal of the terminal.

For different terminal types, the network side device can determine one or more related parameters that affect the selection of PRACH format, and configure at least two PRACH formats that can be used by different terminal types according to one or more related parameters that affect the selection of PRACH format. Get the PRACH resource collection configuration.

In implementation, the PRACH resource set configuration of different terminal types can be determined according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

Specifically, the moving speed range of the terminal can be determined according to the movement characteristics in the class parameters of the terminal, the transmission power of the terminal can be determined according to the terminal power in the class parameters of the terminal, and the supported bandwidth can be estimated according to the transmission power of the terminal. It is also possible to determine the transmit power of the terminal according to the terminal sending EIRP in the capability configuration of the terminal, and determine the bandwidth of the terminal according to the terminal sending bandwidth in the capability configuration of the terminal.

After determining the above-mentioned one or more related parameters, the network-side equipment configures the PRACH format that meets the requirements of the terminal according to the design requirements of the PRACH format of each parameter. As mentioned above, the higher the terminal speed, the greater the required subcarrier spacing , The wider the transmission bandwidth, the longer the length of the Preamble sequence can be supported, and the smaller the transmission power, the PRACH format with more preamble repetitions is preferred. Specifically, when configuring the PRACH format, multiple parameters can be comprehensively considered to configure the corresponding PRACH format.

As an optional implementation manner, the network-side device can use any one or more of the following steps to configure PRACH resources. When multiple steps are performed, the PRACH format can be configured according to one parameter, and then based on another parameter. To further adjust the configuration of the PRACH format, it is also possible to directly consider multiple parameters, and directly configure the PRACH format required by multiple parameters in one step.

Step 1. Configure at least one PRACH format adapted to the moving speeds of different types of terminals respectively;

The subcarrier spacing is suitable for different Doppler frequency shift scenarios, the large subcarrier spacing is suitable for large Doppler frequency shifts, and the small subcarrier spacing is used for small Doppler frequency shifts and fast moving terminals. Will cause greater Doppler frequency shift. Therefore, the PRACH format with large sub-carrier spacing is suitable for terminals with fast moving speed, and the PRACH format with small sub-carrier spacing is suitable for terminals with slow moving speed. This does not affect the moving speed of the terminal. Limit the speed limit.

Step 2: Configure at least one PRACH format adapted to the transmission bandwidth of different types of terminals respectively;

For a terminal with a small transmission bandwidth, in order to reduce the bandwidth occupied by the PRACH signal, a shorter random access preamble sequence length can be used, and the limit of the transmission bandwidth of the terminal is not limited here.

Step 3: Configure at least one PRACH format adapted to the transmit power of different types of terminals respectively.

For terminals with low transmission power, in order to ensure the success rate of random access, the PRACH format with a large number of repeated preamble transmissions is preferred. At the same time, due to the low transmission power, the signal-to-noise ratio of the PRACH signal to the receiving end will be low, to compensate for the signal-to-noise In contrast, a longer random access preamble sequence length is used, and the PRACH format is configured based on the above two requirements, so that the configured PRACH format can not only increase the receiving gain but also compensate the signal-to-noise ratio.

In this embodiment, the terminal determines at least one PRACH resource set corresponding to the type of the terminal, but it is not limited to adopt any of the following methods:

1) Obtain at least one PRACH resource set corresponding to the terminal type among at least two PRACH resource sets configured for different terminal types indicated by the network side device;

That is, for the terminal performing random access, the network side device selects at least one PRACH resource set corresponding to the terminal type from at least two PRACH resource sets configured for different terminal types according to the type of the terminal. Instruct to the terminal.

The network side device can determine the type of the terminal according to the type reported by the terminal.

The network-side device can determine the applicable terminal type for each PRACH resource set according to at least two PRACH resource sets configured for different terminal types, so that according to the type reported by the terminal, the network-side device can be configured for different terminal types at least From the two PRACH resource sets, select at least one PRACH resource set suitable for the terminal type.

2) Determine at least two PRACH resource sets configured for different terminal types, and select at least one PRACH resource set corresponding to the terminal type from the at least two PRACH resource sets;

That is, the terminal selects at least one PRACH resource set corresponding to its own type from at least two PRACH resource sets configured for different terminal types by the network side device according to its own type.

According to at least two PRACH resource sets configured for different terminal types, the terminal can determine the terminal type applicable to each PRACH resource set, so that according to its own type, the network side device according to the at least two PRACH resources configured for different terminal types In the set, select at least one PRACH resource set suitable for its own type.

As an optional implementation manner, the terminal determines that at least two PRACH resource sets configured for different terminal types are configured through the downlink broadcast signaling of the network side device to receive at least two PRACH resource sets configured for different terminal types indicated by the network side device. Physical random access channel PRACH resource collection;

That is, the network side device indicates to the terminal at least two physical random access channel PRACH resource sets configured by the network side device for different terminal types through downlink broadcast signaling.

As another optional implementation manner, at least two physical random access channel PRACH resource sets configured for different terminal types are determined by means of agreement.

That is, the terminal and the network side device pre-appointed through an agreement on at least two physical random access channel PRACH resource sets configured by the network side device for different terminal types.

As an optional implementation manner, selecting a PRACH resource from the determined at least one PRACH resource set includes the following two situations:

A) In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the terminal type;

That is, the terminal randomly selects any PRACH resource from at least one PRACH resource set corresponding to its own type.

B) After establishing the RRC connection, in at least one PRACH resource set corresponding to the type of the terminal, select the designated PRACH resource according to the instructions of the network side device.

That is, the network side device selects the designated PRACH resource and indicates it to the terminal from at least one PRACH resource set corresponding to the type of the terminal.

Since the movement of the terminal makes the distance between the terminal and the network uncertain, if the terminal needs to send a message to the network, it must maintain and manage uplink synchronization in real time. PRACH is to achieve uplink synchronization, through a random access process, establish an uplink synchronization relationship with the network and request the network to allocate dedicated resources to the terminal for normal service transmission.

The foregoing random access execution includes the following two scenarios:

a) Random access in the initial access phase;

In the initial access phase, by performing random access, the terminal goes from the idle state to the RRC connected state.

b) After the RRC connection is established, random access that meets the conditions for performing random access.

After the RRC connection, the conditions for performing random access can be met:

The RRC connection re-establishment process is required;

Cell handover is required to establish uplink synchronization with the new cell through a random access terminal;

When the downlink data arrives, but the uplink is in an "out of synchronization" state, the uplink synchronization is established by initiating random access;

When the uplink data arrives, the uplink is in an "unsynchronized" state or there is no available physical uplink control channel resource PUCCH for full-service routing SR transmission, thereby establishing uplink synchronization by initiating random access.

The following two embodiments respectively describe the PRACH resource configuration and PRACH resource configuration indication solutions in different scenarios.

Example two

Please refer to FIG. 2, for scenario a) in the foregoing embodiment 1, an embodiment of the present disclosure provides a PRACH resource configuration method in the initial access phase, including:

Step 201: The network side device configures at least two physical random access channel PRACH resource sets for different terminal types;

Take the terminal level distinction terminal type as an example. As shown in Table 3, the terminal types are divided into the following two types according to the terminal level. Among them, terminal level 1 and terminal level 2 correspond to different terminal types:

终端等级Terminal level	移动速度Moving speed	终端发送功率Terminal transmit power
终端等级1Terminal level 1	低速移动，小于120km/hMoving at low speed, less than 120km/h	较低Lower
终端等级2Terminal level 2	高速移动，1000km/h以上High-speed movement, above 1000km/h	较高Higher

table 3

For the terminal type of terminal level 1, due to the relatively low moving speed and smaller Doppler frequency shift, the required sub-carrier interval can be smaller, so it can be configured as a 5khz sub-carrier interval, because it is a handheld terminal or a vehicle For the terminal, the power is lower, and the signal-to-noise ratio to the receiving end will be lower. You can use the 839 sequence to compensate for the lower signal-to-noise ratio;

For the terminal type of terminal level 2, it is generally installed on an airplane. Due to the relatively high moving speed and larger Doppler frequency shift, the required sub-carrier spacing can be larger, so it can be configured as a 60khz sub-carrier spacing In order to reduce the bandwidth occupied by PRACH, the 139 sequence is used, and the number of repetitions at the same time is more than 6 times to compensate for the spreading gain of the short sequence.

Please refer to FIG. 3A and FIG. 3B. Therefore, for the above-mentioned terminal types, PRACH resource sets in two formats are pre-configured for the above-mentioned terminal types as set 1 and set 2, respectively.

Each resource set of the configuration contains 64 preamble sequences, where set 1 corresponds to 5khz subcarrier spacing, using 839 long Preamble sequences, and the number of preamble repetitions is 2; set 2 corresponds to 60khz subcarrier spacing, using 139 For a long Preamble sequence, the number of preamble repetitions is 6.

In the above steps, another terminal level division is based on the data transmission rate of the terminal. For example, a low-rate terminal means a smaller transmission bandwidth and lower transmission power, while a high-rate terminal means a larger transmission bandwidth. The transmission power is also larger. The specific division is shown in Table 4.

终端等级Terminal level	速率rate	终端发送功率Terminal transmit power
终端等级1Terminal level 1	数据速率2M bpsData rate 2M bps	较低Lower
终端等级2Terminal level 2	数据速率200MbpsData rate 200Mbps	较高Higher

Table 4

Therefore, for low-rate terminals, due to the small bandwidth, a Preamble sequence with a length of 139 can be used. For high-rate terminals, due to the relatively large bandwidth, a Preamble sequence with a length of 839 can be used.

Further, the division of terminal types can also be divided from terminal capabilities. The terminal capability is a more specific terminal type division, which can be from the terminal's transmit/receive bandwidth, transmit power, data processing capability of the terminal, antenna gain of the terminal, and effective EIRP of the terminal. The terminal capability needs to be notified to the network during initial access. A specific example is as follows:

table 5

Obviously, since terminal capabilities represent a certain characteristic of the terminal, different PRACH resource sets can also be allocated according to the capabilities of different terminals.

Step 202: The terminal determines to perform random access;

Step 203: The network side device indicates to the terminal at least two physical random access channel PRACH resource sets configured for different terminal types through downlink broadcast signaling;

Step 204: The terminal selects at least one PRACH resource set corresponding to its own type from at least two physical random access channel PRACH resource sets configured by the network side device for different terminal types according to its own type;

If the terminal type is terminal level 1, select set 1 from at least two physical random access channel PRACH resource sets configured by the network side device for different terminal types.

Step 205: The terminal randomly selects one PRACH resource from at least one PRACH resource set.

Example three

Please refer to FIG. 4, for scenario b) in the foregoing embodiment 1, an embodiment of the present disclosure provides a PRACH resource configuration method after an RRC connection is established, including:

Step 401: The network side device configures at least two physical random access channel PRACH resource sets for different terminal types;

For the specific configuration method, refer to the methods described in Embodiment 1 and Embodiment 2 above, and will not be repeated here.

Step 402: When the conditions for performing random access are met, determine to perform random access;

The conditions for performing random access can be:

The RRC connection re-establishment process is required;

Step 403: The network side device selects from at least two physical random access channel PRACH resource sets configured by the network side device for different terminal types according to the terminal type reported by the received terminal. The terminal type includes the terminal level or terminal capability identifier. At least one PRACH resource set corresponding to the type of the terminal;

Step 404: The network side device assigns one PRACH resource to the terminal from at least one PRACH resource set.

After the RRC connection is established, since the network-side device already knows the terminal level or terminal capabilities of the terminal, it can allocate a specific PRACH resource set, and it is a non-competitive resource, that is, different users will get different resource indexes and will not mutually Conflict and collision.

Example four

Based on the same inventive concept, please refer to FIG. 5. An embodiment of the present disclosure provides a PRACH resource configuration method applied to a terminal, including:

Step 501: When performing random access, determine at least one PRACH resource set corresponding to the terminal type in at least two physical random access channel PRACH resource sets configured for different terminal types, where the different PRACH resource sets are There is a one-to-one correspondence between different PRACH formats;

Step 502: Select a PRACH resource from the determined at least one PRACH resource set.

As an optional implementation manner, determining to perform random access includes:

In the initial access phase, determine to perform random access; or

As an optional implementation manner, it is determined that among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the terminal type includes:

As an optional implementation manner, determining at least two PRACH resource sets configured for different terminal types includes:

As an optional implementation manner, selecting PRACH resources includes:

As an optional implementation manner, the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

As an optional implementation manner, the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.

For the specific implementation of the operations performed by the above methods, refer to the specific implementation of the PRACH resource configuration and instructing configuration system in the above-mentioned embodiment of the present disclosure when the terminal performs corresponding operations, which will not be repeated in the embodiments of the present disclosure.

Based on the same inventive concept, please refer to FIG. 6, an embodiment of the present disclosure also provides a PRACH resource indication configuration method applied to the network side, including:

Step 601: Configure at least two PRACH resource sets according to different terminal types, and configure and indicate at least two PRACH resource sets for different terminal types. Each PRACH resource set corresponds to the terminal type, and different PRACH resource sets correspond to different terminal types. PRACH format one-to-one correspondence;

Step 602: Indicate the PRACH resource set configuration to the terminal, so that the terminal is used for the initial access phase or random access after the RRC connection.

As an optional implementation manner, indicating the PRACH resource set configuration to the terminal includes:

As an optional implementation manner, determining at least one PRACH resource set corresponding to the type of the terminal among at least two PRACH resource sets configured for different terminal types and indicating to the terminal includes:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

As an optional implementation manner, the PRACH resource set configuration of different terminal types is determined according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

For the specific implementation of the operations performed by the above methods, refer to the specific implementation of the PRACH resource configuration and instructing configuration system in the above-mentioned embodiment of the present disclosure when the network-side device performs the corresponding operations, which will not be repeated in the embodiments of the present disclosure.

Example five

Based on the same inventive concept, please refer to FIG. 7. An embodiment of the present disclosure provides a PRACH resource configuration terminal, including:

A processor 701, a memory 702, and a communication interface 703;

Wherein, the memory 702 stores instructions that can be executed by the processor 701;

When the processor 701 executes the instruction, it is configured to:

Select a PRACH resource from the determined at least one PRACH resource set.

In a possible implementation manner, when the processor 701 executes the instruction, it is specifically configured to:

In the initial access phase, determine to perform random access; or

Acquiring at least one PRACH resource set corresponding to the terminal type among at least two PRACH resource sets configured for different terminal types indicated by the network side device; or

Receive at least two physical random access channel PRACH resource sets configured for different terminal types indicated by the network side device through the downlink broadcast signaling of the network side device; or

By way of agreement, determine at least two physical random access channel PRACH resource sets configured for different terminal types.

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

For the specific implementation manners of operations performed by the above units, reference may be made to the specific implementation manners of the PRACH resource configuration and instructing configuration system in the embodiment of the present disclosure when the terminal performs corresponding operations, which will not be repeated in the embodiments of the present disclosure.

Based on the same inventive concept, please refer to FIG. 8. An embodiment of the present disclosure also provides a network-side device for PRACH resource indication configuration, including:

A processor 801, a memory 802, and a communication interface 803;

Wherein, the memory 802 stores instructions that can be executed by the processor 801;

When the processor 801 executes the instruction, it is configured to:

In a possible implementation manner, when the processor 801 executes the instruction, it is specifically configured to:

By reporting the type of the terminal, the network side device indicates the set of PRACH resources of the terminal and allocates PRACH resources to the terminal.

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

For the specific implementation manners of operations performed by the above units, reference may be made to the specific implementation manners of the PRACH resource configuration and instructing configuration system in the above-mentioned embodiment of the present disclosure when the network-side device performs the corresponding operations, which will not be repeated in the embodiments of the present disclosure.

Example Six

Based on the same inventive concept, please refer to FIG. 9. An embodiment of the present disclosure provides a PRACH resource configuration device, including:

The PRACH resource set determining unit 901 is configured to determine at least one PRACH resource set corresponding to the terminal type among at least two physical random access channel PRACH resource sets configured for different terminal types when performing random access, where , Different PRACH resource sets have a one-to-one correspondence with different PRACH formats;

The PRACH resource selection unit 902 is configured to select a PRACH resource from the determined at least one PRACH resource set.

As an optional implementation manner, the PRACH resource set determining unit 901 is specifically configured to:

In the initial access phase, determine to perform random access; or

As an optional implementation manner, the PRACH resource selection unit 902 is specifically configured to:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

Based on the same inventive concept, please refer to FIG. 10. An embodiment of the present disclosure also provides a PRACH resource configuration device, including:

The PRACH resource set configuration unit 1001 is configured to configure at least two PRACH resource sets according to different terminal types, and configure the indicated at least two PRACH resource sets for different terminal types. Each PRACH resource set corresponds to the type of the terminal. The PRACH resource set corresponds to different PRACH formats one to one;

The PRACH resource set indication unit 1002 is used to indicate the PRACH resource set configuration to the terminal, so that the terminal is used for initial access phase or random access after RRC connection.

As an optional implementation manner, the PRACH resource set indication unit 1002 is specifically configured to:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.

Different terminal levels;

Different terminal capabilities configuration.

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.

Example Seven

Based on the same inventive concept, embodiments of the present disclosure provide a computer-readable storage medium that stores computer instructions, and when the computer instructions run on a computer, the computer executes the PRACH in the embodiments of the present disclosure. Resource configuration and method of indicating configuration.

Those skilled in the art should understand that the embodiments of the present disclosure can be provided as methods, systems, or computer program products. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

The present disclosure is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. In this way, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these modifications and variations.

Claims

A PRACH resource configuration method, applied to a terminal, is characterized in that it includes:

When performing random access, it is determined that among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the terminal type is determined, wherein different PRACH resource sets are different from different PRACH resource sets. Format one to one correspondence;

Select a PRACH resource from the determined at least one PRACH resource set.
The method according to claim 1, wherein determining to perform random access comprises:

In the initial access phase, determine to perform random access; or

After establishing a radio resource control RRC connection, when the conditions for performing random access are met, it is determined to perform random access.
The method according to claim 1 or 2, characterized in that, among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the terminal type includes:

Acquiring at least one PRACH resource set corresponding to the terminal type among at least two PRACH resource sets configured for different terminal types indicated by the network side; or

Determine at least two PRACH resource sets configured for different terminal types, and select at least one PRACH resource set corresponding to the terminal type from the at least two PRACH resource sets.
The method according to claim 1, wherein determining at least two PRACH resource sets configured for different terminal types comprises:

Through downlink broadcast signaling on the network side, receiving at least two physical random access channel PRACH resource sets configured for different terminal types indicated by the network side; or

By means of agreement, determine at least two physical random access channel PRACH resource sets configured for different terminal types.
The method according to claim 1, wherein selecting PRACH resources comprises:

In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the terminal type; or

After the RRC connection is established, in at least one PRACH resource set corresponding to the type of the terminal, a designated PRACH resource is selected according to an instruction of the network.
The method according to claim 1, wherein the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.
The method according to claim 1, wherein the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.
A PRACH resource indication configuration method, applied to the network side, is characterized in that it includes:

According to different terminal types, configure at least two PRACH resource sets, configure at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponds to the terminal type, and different PRACH resource sets have different PRACH formats. One correspondence

Indicate the PRACH resource set configuration to the terminal, so that the terminal is used for initial access phase or random access after the RRC connection.
The method according to claim 8, wherein indicating the PRACH resource set configuration to the terminal comprises:

Determine at least one PRACH resource set corresponding to the type of terminal among at least two PRACH resource sets configured for different terminal types, and indicate to the terminal; or

Through downlink broadcast signaling, at least two PRACH resource sets configured for different terminal types are indicated to the terminal.
The method according to claim 9, wherein determining at least two PRACH resource sets configured for different terminal types comprises:

Determine at least two PRACH resource sets configured for different terminal types by means of agreement.
The method according to claim 9, wherein determining at least one PRACH resource set corresponding to the type of the terminal among the at least two PRACH resource sets configured for different terminal types, and indicating to the terminal, comprises :

By reporting the type of the terminal, the network side indicates the set of PRACH resources of the terminal and allocates PRACH resources for the terminal.
The method according to claim 8, wherein the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.
The method according to claim 8, wherein the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.
The method according to claim 9, wherein the PRACH resource set configuration of different terminal types is determined according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.
A terminal for PRACH resource configuration, characterized in that it includes:

Processor, memory and communication interface;

Wherein, the memory stores instructions that can be executed by the processor;

When the processor executes the instruction, it is used to:

When performing random access, it is determined that among at least two physical random access channel PRACH resource sets configured for different terminal types, at least one PRACH resource set corresponding to the type of the terminal, where different PRACH resource sets are different from different ones One-to-one correspondence with PRACH format;

Select a PRACH resource from the determined at least one PRACH resource set.
The terminal according to claim 15, wherein the processor is specifically configured to:

In the initial access phase, determine to perform random access; or

After establishing a radio resource control RRC connection, when the conditions for performing random access are met, it is determined to perform random access.
The terminal according to claim 15 or 16, wherein the processor is specifically configured to:

Acquiring at least one PRACH resource set corresponding to the terminal type among at least two PRACH resource sets configured for different terminal types indicated by the network side; or

Determine at least two PRACH resource sets configured for different terminal types, and select at least one PRACH resource set corresponding to the terminal type from the at least two PRACH resource sets.
The terminal according to claim 15, wherein the processor is specifically configured to:

Through downlink broadcast signaling on the network side, receiving at least two physical random access channel PRACH resource sets configured for different terminal types indicated by the network side; or

By means of agreement, determine at least two physical random access channel PRACH resource sets configured for different terminal types.
The terminal according to claim 15, wherein the processor is specifically configured to:

In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or

After the RRC connection is established, in at least one PRACH resource set corresponding to the type of the terminal, a designated PRACH resource is selected according to an instruction of the network.
The terminal according to claim 15, wherein the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.
The terminal according to claim 15, wherein the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.
A network-side device for PRACH resource indication configuration, which is characterized in that it includes:

Processor, memory and communication interface;

Wherein, the memory stores instructions that can be executed by the processor;

When the processor executes the instruction, it is used to:

According to different terminal types, configure at least two PRACH resource sets, configure at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponds to the type of terminal, and different PRACH resource sets have different PRACH formats One-to-one correspondence

Indicate the PRACH resource set configuration to the terminal, so that the terminal is used for initial access phase or random access after the RRC connection.
The network-side device according to claim 22, wherein the processor is specifically configured to:

Determine at least one PRACH resource set corresponding to the type of terminal among at least two PRACH resource sets configured for different terminal types, and indicate to the terminal; or

Through downlink broadcast signaling, at least two PRACH resource sets configured for different terminal types are indicated to the terminal.
The network-side device according to claim 23, wherein the processor is specifically configured to:

Determine at least two PRACH resource sets configured for different terminal types by means of agreement.
The network-side device according to claim 23, wherein the processor is specifically configured to:

By reporting the type of the terminal, the network side indicates the set of PRACH resources of the terminal and allocates PRACH resources for the terminal.
The network side device according to claim 22, wherein the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.
The network side device according to claim 22, wherein the different terminal types include any one or more:

Different terminal levels;

Different terminal capabilities configuration.
The network side device according to claim 23, wherein the PRACH resource set configuration of different terminal types is determined according to at least one or more of the following related parameters:

The moving speed of the terminal;

The sending bandwidth of the terminal;

The transmit power of the terminal.
A device for configuring PRACH resources, characterized in that it comprises:

The PRACH resource set determining unit is configured to determine at least one PRACH resource set corresponding to the type of the terminal among at least two physical random access channel PRACH resource sets configured for different terminal types when performing random access, wherein: Different PRACH resource sets have a one-to-one correspondence with different PRACH formats;

The PRACH resource selection unit is configured to select PRACH resources from the determined at least one PRACH resource set.
The apparatus according to claim 29, wherein the PRACH resource set determining unit is specifically configured to:

In the initial access phase, determine to perform random access; or

After establishing a radio resource control RRC connection, when the conditions for performing random access are met, it is determined to perform random access.
The device according to claim 29, wherein the PRACH resource selection unit is specifically configured to:

In the initial access phase, randomly select one PRACH resource from at least one PRACH resource set corresponding to the terminal type; or

After the RRC connection is established, in at least one PRACH resource set corresponding to the type of the terminal, a designated PRACH resource is selected according to an instruction of the network.
The apparatus according to claim 29, wherein the different PRACH formats include any one or more of the following differences:

Different cyclic prefix CP length;

Different random access preamble sequence length;

The number of repeated transmissions of different Preambles;

Different subcarrier spacing.
A device for indicating configuration of PRACH resources is characterized by comprising:

The PRACH resource set configuration unit is used to configure at least two PRACH resource sets according to different terminal types. Among the at least two PRACH resource sets indicated for different terminal types, each PRACH resource set corresponds to the type of the terminal. The PRACH resource set has a one-to-one correspondence with different PRACH formats;

The PRACH resource set indication unit is used to indicate the PRACH resource set configuration to the terminal, so that the terminal is used for the initial access phase or random access after the RRC connection.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer executes any one of claims 1-14. method.