CN118843210A

CN118843210A - PRACH transmission method and device

Info

Publication number: CN118843210A
Application number: CN202310423217.2A
Authority: CN
Inventors: 侯利明; 康绍莉; 缪德山; 韩波; 肖国军
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2024-10-25
Also published as: WO2024217473A1

Abstract

The disclosure provides a PRACH transmission method and device, which relate to the technical field of communication and comprise the following steps: the terminal device sends the PRACH to the network device according to the PRACH retransmission times, wherein the PRACH retransmission times are determined at least based on the RO time domain length, compared with the mode of indicating the PRACH retransmission times by adding the auxiliary information in the related art, the method and the device can save signaling overhead without introducing new auxiliary information, and reduce interaction for the auxiliary information, thereby improving communication efficiency.

Description

PRACH transmission method and device

Technical Field

The present disclosure relates to communication technologies, and in particular, to a method and an apparatus for PRACH transmission.

Background

In the scenario where the terminal device interacts with the network device, in order to improve the probability of success of the terminal device interacting with the network device, an enhanced transmission may be performed on the physical random access channel.

In the related art, side information is introduced to enhance transmission of a physical random access channel through the side information.

However, the physical random access channel is enhanced and transmitted by introducing the implementation of the auxiliary information, so that the technical problem of wasting signaling overhead exists.

Disclosure of Invention

The disclosure provides a method and a device for PRACH transmission, which are used for avoiding the technical problem of wasting signaling overhead in the related art.

In a first aspect, the present disclosure provides a PRACH transmission method, including:

Transmitting PRACH to the network equipment according to the PRACH repeated transmission times;

Wherein the number of PRACH retransmissions is determined based at least on a random access occasion RO time domain length.

In this embodiment, the number of PRACH repeated transmissions may be determined at least based on the RO time domain length, and no auxiliary information needs to be introduced, so that the disadvantage of increasing signaling overhead caused by introducing auxiliary information may be avoided, further signaling overhead may be saved, and interactions between the terminal device and the network device newly added due to introducing auxiliary information may be reduced, so that communication efficiency may be improved.

Optionally, the method further comprises:

Determining a Preamble format and a random access opportunity RO time domain length according to the acquired PRACH configuration information;

And calculating the PRACH repeated transmission times according to the Preamble format and the RO time domain length.

Optionally, the determining the Preamble format and the random access opportunity RO time domain length according to the obtained PRACH configuration information includes:

receiving PRACH configuration information, wherein the PRACH configuration information comprises PRACH configuration indexes;

And determining the Preamble format and the RO time domain length according to the PRACH configuration index.

Optionally, the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

Optionally, the number of PRACH retransmissions is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

Optionally, the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length.

Optionally, the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length, including:

If the ratio is an integer, the PRACH repeated transmission times are equal to the ratio;

and if the ratio is a non-integer, the PRACH repeated transmission times are equal to the integer which is closest to the ratio and smaller than the ratio.

In this embodiment, the number of PRACH retransmissions is determined from two different dimensions, where the ratio is an integer or a non-integer, so as to achieve flexibility and reliability in determining the number of PRACH retransmissions.

Optionally, determining the Preamble format and the RO time domain length according to the PRACH configuration index includes:

inquiring a preset table based on the PRACH configuration index, and determining a Preamble format and/or RO time domain length corresponding to the PRACH configuration index; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

In this embodiment, the accuracy and reliability of determining the Preamble format and the RO time domain length may be achieved by querying a preset table to determine the Preamble format and the RO time domain length.

Optionally, the PRACH configuration information is received through at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In this embodiment, the flexibility and diversity of receiving the PRACH configuration information may be achieved by receiving the PRACH configuration information based on at least one of MIB message, SIB message, and RRC signaling.

In a second aspect, the present disclosure provides a PRACH transmission apparatus, including:

A sending unit, configured to send the PRACH to the network device according to the number of repeated transmission times of the PRACH of the physical random access channel;

Optionally, the apparatus further comprises:

A determining unit, configured to determine a Preamble format and a random access opportunity RO time domain length according to the obtained PRACH configuration information;

And the calculating unit is used for calculating the PRACH repeated transmission times according to the Preamble format and the RO time domain length.

Optionally, the determining unit includes:

A receiving subunit, configured to receive PRACH configuration information, where the PRACH configuration information includes a PRACH configuration index;

And the determining subunit is used for determining the Preamble format and the RO time domain length according to the PRACH configuration index.

Optionally, the determining subunit is configured to query a preset table based on the PRACH configuration index, and determine a Preamble format and/or an RO time domain length corresponding to the PRACH configuration index; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In a third aspect, the present disclosure provides a PRACH transmission apparatus, including a memory, a transceiver, and a processor:

the memory is used for storing a computer program; the transceiver is used for receiving and transmitting data under the control of the processor; the processor is configured to read the computer program in the memory and perform the following operations:

Optionally, the processor is further configured to:

Optionally, the determining the Preamble format and the random access opportunity RO time domain length according to the obtained PRACH configuration information specifically includes:

Optionally, the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length, specifically including:

Optionally, the determining the Preamble format and the RO time domain length according to the PRACH configuration index specifically includes:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In a fourth aspect, the present disclosure provides a PRACH transmission method, the method comprising:

the receiving terminal equipment is accessed according to physical random channel PRACH retransmission PRACH transmitted a number of times;

Optionally, the method further comprises:

PRACH configuration information is sent to the terminal equipment;

The PRACH configuration information is used for determining a Preamble format and a random access opportunity RO time domain length, and the Preamble format and the RO time domain length are used for calculating the PRACH repeated transmission times.

Optionally, the PRACH configuration information includes a PRACH configuration index; the PRACH configuration index is used to determine the Preamble format and the RO time domain length.

Optionally, the Preamble format and the RO time domain length are determined by querying a preset table based on the PRACH configuration index; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

Optionally, the PRACH configuration information is sent by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In a fifth aspect, the present disclosure provides a PRACH transmission apparatus, the apparatus comprising:

A receiving unit, configured to receive a PRACH sent by a terminal device according to the number of repeated transmission times of the PRACH of a physical random access channel;

Optionally, the apparatus further comprises:

A sending unit, configured to send PRACH configuration information to the terminal device;

Optionally, the PRACH configuration information is sent by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In a sixth aspect, the present disclosure provides a PRACH transmission apparatus, including a memory, a transceiver, and a processor;

Optionally, the processor is further configured to send PRACH configuration information to the terminal device;

Optionally, the PRACH configuration information is sent by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

In a seventh aspect, the present disclosure provides a non-transitory readable storage medium storing a computer program for causing a processor to perform the method according to any one of the first aspects.

In an eighth aspect, the present disclosure provides a non-transitory readable storage medium storing a computer program for causing a processor to perform the method according to any one of the fourth aspects.

In a ninth aspect, the present disclosure provides a computer program product comprising a computer program which, when executed by a processor, implements the method of the first or fourth aspect.

It should be understood that the description of the invention above is not intended to limit key or critical features of embodiments of the invention, nor to limit the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram of the architecture of a 5G NR system;

fig. 2 is a schematic diagram of a PRACH transmission method according to an embodiment of the disclosure;

Fig. 3 is a schematic diagram of a PRACH transmission method according to another embodiment of the disclosure;

FIG. 4 is a schematic diagram of the Preamble format and RO time domain length;

FIG. 5 is a schematic diagram of a portion of a default table;

Fig. 6 is a schematic diagram of a PRACH transmission device according to an embodiment of the disclosure;

fig. 7 is a schematic diagram of a PRACH transmission device according to another embodiment of the disclosure;

Fig. 8 is a schematic diagram of a PRACH transmission device according to another embodiment of the disclosure;

Fig. 9 is a schematic diagram of a PRACH transmission device according to another embodiment of the disclosure.

Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The term "and/or" in the embodiments of the present disclosure describes an association relationship of association objects, which indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present disclosure means two or more, and other adjectives are similar thereto.

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

For a New wireless/New air (NR) system of a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G), a related technology specifies a Preamble (Preamble) format (format), a Random access opportunity (RACH Occasion, RO) time domain length, and a corresponding manner to the Preamble format adopted by a Physical Random access channel (Physical Random ACCESS CHANNEL, PRACH).

Fig. 1 is a schematic diagram of the architecture of a 5G NR system, wherein,

The network slice selection function (Network Slice Selection Function, NSSF) is a 5G support network slice network function. A set of network slice instances that provide services to the terminal device is selected to provide personalized network services to the user.

The network open function (Network Exposure Function, NEF) is a network function that opens to the outside and provides a standard interface for 5G. The network function based on the third generation partnership project (3rd Generation Partnership Project,3GPP) discloses functions and events to other systems through NEF, so that the openness is provided and the safety of the system can be ensured.

A network repository function (Network Repository Function, NRF), one of the network functions of the 5G core network. A service discovery Function is supported, a NF discovery request is received from a Network Function (NF) instance, and information of the NF instance (discovered) is provided to the NF instance.

A policy control function (Policy Control Function, PCF), one of the network functions of the 5G core network. Its main function is to use a unified policy framework to manage network behavior and to cooperate with information in a unified data store (Unified Data Repository, UDR) to execute related policies.

Unified data management (Unified DATA MANAGEMENT, UDM), one of the network functions of the 5G core network. Authentication and key agreement (Authentication AND KEY AGREEMENT) Authentication credentials are generated in third generation mobile communication networks, and the user is identified and validated by storing and managing a user permanent identifier (SUbscription PERMANENT IDENTIFIER, SUPI).

An application function (Application Function, AF) responsible for interacting with the 3GPP core network to provide services.

An authentication server function (Authentication Server Function, AUSF) is responsible for user authentication data-related processing.

The access and mobility management function (ACCESS AND Mobility Management Function, AMF), which is a very important network function in 5G, directly manages requests for 5G wireless access, performs registration management, connection management, reachability management, mobility management, etc.

Session management functions (Session Management Function, SMF), one of the important network functions in 5G. Session management, such as session establishment, modification and release, including maintenance of tunnels between user plane functions (User Plane Function, UPF) and Access Network (AN) nodes, terminal equipment internet protocol (Internet Protocol, IP) address assignment and management, and the like.

A service communication proxy (Service Communication Proxy, SCP) for indirect communication, signalling forwarding and routing, load balancing.

A network-segment admission control function (Network Slice Admission Control Function, NSACF) that monitors and controls the number of registered terminal devices on each network segment; the number of protocol data unit (Protocol Data Unit, PDU) sessions established per network tile is monitored and controlled.

In 5G, a terminal device may be referred to as a User Equipment (UE).

A (Radio) Access Network (R AN) for connecting the terminal device to the core Network.

The user plane function (User Plane Function, UPF) is one of the important network functions in 5G. Packet routing and forwarding, packet inspection, user plane part policy rules enforcement, such as gating, redirection, traffic steering, etc.

A Data Network (DN) may be an operator service, an internet access or a third party service.

In the 5G architecture, the interfaces of each core network element may be collectively named as "n+lowercase english function name", such as Nnssf, nnef, npcf, nudm, naf, neasdf, N, N2, N3, N4, N6, and N9 described in fig. 1, which are all interfaces.

For example, the interface of the network slice selection function NSSF is a Nnssf interface; the N1 interface is a Network access service (Network ATTACHED SERVER, NAS) interface, which is used for sending NAS messages; the N2 interface is AN interface (NG interface) between a radio access network between AN and AN AMF and a 5G core network; the N3 interface is a butt joint interface between the AN and the UPF; the N4 interface is a device interface for separating a control plane SMF and a user plane UPF; the N6 interface is a protocol interface between an internal network side and an external network side; the N9 interface is an interface between two UPFs, etc., and is not listed here.

The terminal device may be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core network devices via a radio access network (Radio Access Network, RAN for short), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, for example, portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. For another example, the wireless terminal may be a Personal communication service (Personal Communication Service, PCS) phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA) or the like. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Terminal (Remote Terminal), access Terminal (ACCESS TERMINAL), user Terminal (User Terminal), user Agent (User Agent), user equipment (User Device or User Equipment), without limitation. Optionally, the terminal device may also be a device such as a smart watch or a tablet computer.

The Non-terrestrial network (Non-TERRESTRIAL NETWORK, NTN) scenario of 3GPP is a satellite transparent forwarding mode, i.e. the network device (e.g. base station gNB) transmits signals to satellites on the ground, and the satellites forward to ground terminal devices, and vice versa.

The NTN of 3GPP is currently discussing coverage enhancement techniques to solve the problem of link tension in NTN scenario by repeating transmission, ensuring system coverage. In NTN scenario, the transmission distance is far, which causes large space loss, and the link attenuation is serious, especially the uplink is limited by the power constraint of the terminal device, the uplink transmission condition is especially bad, especially for PRACH in random access, and the uplink enhancement is very necessary.

For example, in NTN scenario, since the transmission distance between the satellite and the terminal device may reach hundreds kilometers or even thousands kilometers, the transmission loss is very large, especially, the uplink generally has a signal-to-noise ratio of only-10 decibels (dB), which has a low success probability for detecting the existing Preamble format, and may affect the normal access of the terminal device. Enhanced transmission of PRACH in NTN scenarios is therefore required.

It should be understood that, considering the characteristic that the transmission distance of the TNT scenario is far, the enhanced transmission of the PRACH is particularly suitable for the TNT scenario, but the enhanced transmission of the PRACH may also be suitable for other scenarios, and cannot be understood as a limitation of the scenario.

In the related art, PRACH enhanced transmission may be performed by repeating transmission of PRACH by the terminal device for multiple times and combining detection by the network device, for example, repeating transmission of Preamble, and repeating transmission of multiple times in the time domain by using the Preamble format of 5G NR.

Accordingly, the information such as the number of PRACH repeated transmissions, the RO time domain length, etc. needs to be indicated to ensure that the communication system (including the network device and the terminal device) can operate normally. For example, the auxiliary information may be added to indicate the number of PRACH retransmissions and the corresponding RO time domain length, etc. by the auxiliary information.

However, by adding the auxiliary information as described above, there is a technical problem of wasting signaling overhead.

In order to avoid the technical problems described above, the present disclosure provides an inventive working pair technical idea: the number of PRACH retransmissions is indicated based on the RO time domain length.

Based on the technical conception, the disclosure provides a PRACH transmission method.

Referring to fig. 2, fig. 2 is a schematic diagram of a PRACH transmission method according to an embodiment of the disclosure, as shown in fig. 2, the method includes:

S201: and the terminal equipment sends the PRACH to the network equipment according to the PRACH repeated transmission times, wherein the PRACH repeated transmission times are determined at least based on the RO time domain length.

That is, in this embodiment, the number of PRACH retransmissions may be indicated by the RO time domain length or may be indicated by the RO time domain length in combination with other information, and compared with a manner of indicating the number of PRACH retransmissions by adding auxiliary information in the related art, in this embodiment, no new auxiliary information is required to be introduced, which may achieve signaling overhead saving and may reduce interaction with auxiliary information, thereby improving communication efficiency.

In order for the reader to more fully understand the implementation principles of the present disclosure, the PRACH transmission method of the present disclosure will now be described in detail with reference to fig. 3 to 5. Fig. 3 is a schematic diagram of a PRACH transmission method according to another embodiment of the disclosure, as shown in fig. 3, where the method includes:

s301: the network device sends PRACH configuration information to the terminal device.

Wherein the PRACH configuration information includes a PRACH configuration index (Configuration Index).

Correspondingly, the terminal equipment receives the PRACH configuration information sent by the network equipment so as to acquire the PRACH configuration index sent by the network equipment.

In some embodiments, the network device may carry the PRACH configuration information in a management information block (Master Information Block, MIB) message and send the MIB message to the terminal device to send the PRACH configuration information to the terminal device via the MIB message.

Correspondingly, the terminal equipment receives the MIB message sent by the network equipment and extracts PRACH configuration information from the MIB message to acquire the PRACH configuration index.

In other embodiments, the network device may carry the PRACH configuration information in a service independent Building block (SIB) message, and send the SIB message to the terminal device, so as to send the PRACH configuration information to the terminal device through the SIB message.

Correspondingly, the terminal equipment receives the SIB message sent by the network equipment and extracts PRACH configuration information from the SIB message to acquire the PRACH configuration index.

In still other embodiments, the network device may carry the PRACH configuration information in radio resource control (Radio Resource Control, RRC) signaling and send the RRC signaling to the terminal device to send the PRACH configuration information to the terminal device through the RRC signaling.

Correspondingly, the terminal equipment receives the RRC signaling sent by the network equipment, and extracts PRACH configuration information from the RRC signaling to acquire the PRACH configuration index.

It should be understood that the above examples are only for exemplary purposes and that the possible implementation of the terminal device to obtain PRACH configuration information is not to be construed as limiting the terminal device to obtain PRACH configuration information.

S302: the terminal device determines the Preamble format and the RO time domain length (i.e., PRACH duration) according to the PRACH configuration index.

For example, the terminal device may query a preset table based on the PRACH configuration index to determine a Preamble format and/or RO time domain length corresponding to the PRACH configuration index.

The preset table is used for representing the corresponding relation among PRACH configuration index, preamble format and RO time domain length.

As an example, based on the related protocol, the Preamble format includes a plurality of different formats, such as an A1 format and an A2 format, and the like, where the Preamble format has a corresponding RO time-domain length, and in this embodiment, in order to indicate the number of PRACH retransmissions based on the RO time-domain length, the RO time-domain length in the related protocol is adjusted. Taking the Preamble format as the A1 format as an example, the adjustment of the RO time domain length corresponding to the A1 format is described as follows.

Format A1 has a time domain length of 28k+4096k, k represents a word length time interval, k=64×tc, tc represents a minimum time interval, tc=0.509 ns, that is, the time domain length of format A1 is about 0.1428ms, which corresponds to 2 orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol lengths.

As shown in fig. 4, if format A1 is repeatedly transmitted 4 times, the time domain length of format A1 is equal to 8 OFDM symbol lengths, and then the RO time domain length corresponding to format A1 may be determined to be 8 OFDM symbol lengths.

That is, in the related protocol, the RO time-domain length corresponding to the format A1 is 2 OFDM symbol lengths, and in the present embodiment, the RO time-domain length corresponding to the format A1 is adjusted to 8 OFDM symbol lengths to indicate the number of PRACH repeated transmissions through the RO time-domain length.

It should be understood that the foregoing is merely exemplary of the manner in which the RO time domain length may be adjusted, and is not to be construed as limiting the RO time domain length adjustment. For example, as described above, the RO time-domain length corresponding to a certain format may be adjusted based on an integer multiple relationship, and in other embodiments, the RO time-domain length corresponding to a certain format may be adjusted based on a non-integer multiple relationship.

That is, the RO time domain length corresponding to the Preamble format may be adjusted based on the integer multiple relationship and the format time domain length of the Preamble format in the related protocol, or the RO time domain length corresponding to the Preamble format may be adjusted based on the non-integer multiple relationship and the format time domain length of the Preamble format in the related protocol. That is, the format time domain length of the Preamble format may be an integer multiple relationship or a non-integer multiple relationship with the RO time domain length corresponding to the Preamble format. The format time domain length of the Preamble format is the OFDM symbol length of the Preamble format.

For example, fig. 5 exemplarily shows a part of contents in the preset table, as shown in fig. 5, the PRACH configuration index is 87, the preamble format is A1, and the RO time domain length is 8 symbols.

Here, PRACH configuration index 87 represents that the Preamble is transmitted in the Preamble format A1 when the system frame Nsfn mod x (16) =y (0) is satisfied, that is, the Preamble of the format A1 is transmitted once every 160ms, specifically, the Preamble is transmitted on the 4 th and 9 th Subframe number (Subframe number). The penultimate column represents that the number of times of PRACH time domain in one PRACH time slot is 1, namely, 1 Preamble is sent in one PRACH time slot; the third last column represents that one subframe contains 1 PRACH slot, and the fourth last column represents that the starting symbol (Starting symbol) is 0.

In other embodiments, a new PRACH configuration index may be added to the associated protocol to query the preset table with the new PRACH configuration index. As shown in fig. 5, a new sequence number may be added to the preset table, so as to obtain, by querying the new sequence number from the preset table, a Preamble format and an RO time domain length corresponding to the new sequence number.

S303: and the terminal equipment determines the PRACH repeated transmission times according to the Preamble format and the RO time domain length.

Illustratively, in combination with the above analysis, the Preamble format has a format time domain length, and accordingly, the number of PRACH retransmissions may be determined based on the format time domain length and the RO time domain length. For example, the PRACH repeated transmission times are inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

Wherein, the PRACH repeated transmission number N can be calculated by the formula 1, formula 1: n=round (RO time domain length/format time domain length), round being a rounding function.

The ratio of the RO time domain length to the format time domain length (i.e., RO time domain length/format time domain length) may be an integer or a non-integer, and if the ratio is an integer, N is equal to the integer; if the number is a non-integer, N is equal to an integer after rounding the non-integer, and the integer is the nearest integer to the non-integer.

The calculated N may be different between different RO time domain lengths and different format time domain lengths, for example, N may be 2 times, or may be 4 times, or may be 8 times, or may be 16 times, or may be 32 times, which is not limited in this embodiment.

S304: and the terminal equipment sends the PRACH to the network equipment according to the PRACH repeated transmission times.

In combination with the above example, if the Preamble format is format A1 and N is 8 times, when the terminal device sends the PRACH to the network device, the terminal device repeatedly transmits the format A1 (including Cyclic Prefix (CP), preamble sequence, guard Band (GB)) 8 times.

Based on the technical conception, the disclosure provides a PRACH transmission device.

Referring to fig. 6, fig. 6 is a schematic diagram of a PRACH transmission apparatus according to an embodiment of the disclosure, and as shown in fig. 6, a PRACH transmission apparatus 600 includes:

a transmitting unit 601, configured to transmit the PRACH to the network device according to the number of PRACH repeated transmissions of the physical random access channel.

In some embodiments, as can be seen in conjunction with fig. 6, the PRACH transmission apparatus 600 further includes:

A determining unit 602, configured to determine a Preamble format and a random access opportunity RO time domain length according to the obtained PRACH configuration information.

In some embodiments, as shown in fig. 6, the determining unit 602 includes:

A receiving subunit 6021, configured to receive PRACH configuration information, where the PRACH configuration information includes a PRACH configuration index.

A determining subunit 6022, configured to determine the Preamble format and the RO time domain length according to the PRACH configuration index.

In some embodiments, the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

In some embodiments, the PRACH retransmission number is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

In some embodiments, the PRACH repeat transmission number is less than or equal to a ratio between the RO time domain length and the format time domain length.

In some embodiments, the PRACH repeat transmission number is less than or equal to a ratio between the RO time domain length and the format time domain length, comprising:

In some embodiments, the determining subunit is configured to query a preset table based on the PRACH configuration index, and determine a Preamble format and/or an RO time domain length corresponding to the PRACH configuration index; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

In some embodiments, the PRACH configuration information is received through at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

A calculating unit 603, configured to calculate the PRACH retransmission times according to the Preamble format and the RO time domain length.

It should be noted that, the above device provided in the embodiment of the present disclosure can implement all the method steps implemented in the embodiment of the method, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the embodiment of the method are omitted herein.

In addition, the division of the units in the embodiments of the present disclosure is schematic, which is merely a logic function division, and other division manners may be actually implemented. In addition, each functional unit in each embodiment of the present disclosure 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 integrated units may be implemented in hardware or in software functional units.

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

Based on the technical conception, the disclosure also provides a PRACH transmission device.

Referring to fig. 7, fig. 7 is a schematic diagram of a PRACH transmission device according to another embodiment of the disclosure, and as shown in fig. 7, the PRACH transmission device includes: memory 701, transceiver 702, processor 703.

A transceiver 702 for receiving and transmitting data under the control of the processor 703.

Wherein in fig. 7, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 703 and various circuits of the memory, represented by memory 701, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like. The user interface 704 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 703 is responsible for managing the bus architecture and general processing, and the memory 701 may store data used by the processor 703 in performing operations.

Alternatively, the processor 703 may be a CPU (central processing unit), an ASIC (Application SPECIFIC INTEGRATED Circuit), an FPGA (Field-Programmable gate array) or a CPLD (Complex Programmable Logic Device ), and the processor may also employ a multi-core architecture.

The processor is operable to perform any of the methods provided by embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in a memory. The processor and the memory may also be physically separate.

The processor 703 is exemplary for reading the computer program in the memory and performing the following operations:

And sending the PRACH to the network equipment according to the PRACH repeated transmission times.

In some embodiments, the processor 703 is further configured to perform the following operations:

And determining a Preamble format and a random access opportunity RO time domain length according to the acquired PRACH configuration information.

In some embodiments, the determining the Preamble format and the random access opportunity RO time domain length according to the obtained PRACH configuration information specifically includes:

In some embodiments, the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length, specifically including:

In some embodiments, the determining the Preamble format and the RO time domain length according to the PRACH configuration index specifically includes:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

Referring to fig. 8, fig. 8 is a schematic diagram of a PRACH transmission apparatus according to another embodiment of the disclosure, and as shown in fig. 8, a PRACH transmission apparatus 800 includes:

a receiving unit 801, configured to receive PRACH sent by a terminal device according to the number of repeated transmission times of the PRACH of the physical random access channel.

In some embodiments, as shown in fig. 8, the PRACH transmission apparatus 800 further includes:

a transmitting unit 802, configured to transmit PRACH configuration information to the terminal device.

In some embodiments, the PRACH configuration information comprises a PRACH configuration index; the PRACH configuration index is used to determine the Preamble format and the RO time domain length.

In some embodiments, the Preamble format and the RO time domain length are determined based on the PRACH configuration index query preset table; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

In some embodiments, the PRACH configuration information is transmitted by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

Referring to fig. 9, fig. 9 is a schematic diagram of a PRACH transmission apparatus according to another embodiment of the disclosure, as shown in fig. 8, a PRACH transmission apparatus 900 includes: memory 901, transceiver 902, processor 903;

The memory 901 is used for storing a computer program; the transceiver 902 is configured to receive and transmit data under the control of the processor; the processor 903 is configured to read the computer program in the memory and perform the following operations:

In some embodiments, the processor 903 is further configured to send PRACH configuration information to the terminal device;

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

Based on the above technical idea, the present disclosure further provides a non-transitory readable storage medium storing a computer program for causing a processor to execute the method according to any one of the embodiments.

The non-transitory readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

Based on the above technical idea, the present disclosure also provides a computer program product comprising a computer program which, when executed by a processor, implements a method as described in any of the embodiments above.

It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the disclosure. Thus, the present disclosure is intended to include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of PRACH transmission, the method comprising:

2. The method according to claim 1, wherein the method further comprises:

3. The method of claim 2, wherein the determining the Preamble format and the random access occasion RO time domain length according to the obtained PRACH configuration information comprises:

4. The method of claim 2, wherein the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

5. The method of claim 4, wherein the number of PRACH retransmissions is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

6. The method of claim 5, wherein the PRACH repeat transmission number is less than or equal to a ratio between the RO time domain length and the format time domain length.

7. The method of claim 6, wherein the PRACH repeat transmission number is less than or equal to a ratio between the RO time domain length and the format time domain length, comprising:

8. The method of claim 3, wherein determining the Preamble format and the RO time domain length from the PRACH configuration index comprises:

9. The method of any of claims 3-8, wherein the PRACH configuration information is received by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

10. A PRACH transmission apparatus, the apparatus comprising:

11. A PRACH transmission device, comprising a memory, a transceiver, and a processor;

12. The apparatus of claim 11, wherein the processor is further configured to:

13. The apparatus of claim 12, wherein the determining the Preamble format and the random access occasion RO time domain length according to the obtained PRACH configuration information specifically comprises:

14. The apparatus of claim 12, wherein the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

15. The apparatus of claim 14, wherein the number of PRACH retransmissions is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

16. The apparatus of claim 15, wherein the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length.

17. The apparatus of claim 16, wherein the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length, and further comprising:

18. The apparatus of claim 13, wherein the determining the Preamble format and the RO time domain length according to the PRACH configuration index specifically comprises:

19. The apparatus of any of claims 13-18, wherein the PRACH configuration information is received through at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

20. A method of PRACH transmission, the method comprising:

21. The method of claim 20, wherein the method further comprises:

PRACH configuration information is sent to the terminal equipment;

22. The method of claim 21, wherein the PRACH configuration information comprises a PRACH configuration index; the PRACH configuration index is used to determine the Preamble format and the RO time domain length.

23. The method of claim 21, wherein the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

24. The method of claim 23, wherein the number of PRACH retransmissions is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

25. The method of claim 24, wherein the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length.

26. The method of claim 25, wherein the PRACH repeat transmission number is less than or equal to a ratio between the RO time domain length and the format time domain length, comprising:

27. The method of claim 22, wherein the Preamble format and the RO time domain length are determined based on the PRACH configuration index query preset table; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

28. The method of any of claims 22-27, wherein the PRACH configuration information is transmitted by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

29. A PRACH transmission apparatus, the apparatus comprising:

30. A PRACH transmission device, comprising a memory, a transceiver, and a processor;

31. The apparatus of claim 30, wherein the processor is further configured to send PRACH configuration information to the terminal device;

32. The apparatus of claim 31, wherein the PRACH configuration information comprises a PRACH configuration index; the PRACH configuration index is used to determine the Preamble format and the RO time domain length.

33. The apparatus of claim 31, wherein the Preamble format has a format time domain length; the number of PRACH retransmissions is determined from the format time domain length and the RO time domain length.

34. The apparatus of claim 33, wherein the number of PRACH retransmissions is inversely proportional to the format time domain length; the number of PRACH retransmissions is proportional to the RO time domain length.

35. The apparatus of claim 34, wherein the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length.

36. The apparatus of claim 35, wherein the number of PRACH retransmissions is less than or equal to a ratio between the RO time domain length and the format time domain length, comprising:

37. The apparatus of claim 32, wherein the Preamble format and the RO time domain length are determined based on the PRACH configuration index query preset table; the preset table is used for representing the corresponding relation among the PRACH configuration index, the Preamble format and the RO time domain length.

38. The apparatus of any of claims 32-37, wherein the PRACH configuration information is transmitted by at least one of:

A management information block MIB message;

service independent building block SIB messages;

Radio resource control, RRC, signaling.

39. A non-transitory readable storage medium storing a computer program for causing a processor to perform the method of any one of claims 1 to 9.

40. A non-transitory readable storage medium storing a computer program for causing a processor to perform the method of any one of claims 20 to 28.