CN114666919B - Random access method, information broadcasting device and electronic equipment - Google Patents

Random access method, information broadcasting device and electronic equipment Download PDF

Info

Publication number
CN114666919B
CN114666919B CN202210537147.9A CN202210537147A CN114666919B CN 114666919 B CN114666919 B CN 114666919B CN 202210537147 A CN202210537147 A CN 202210537147A CN 114666919 B CN114666919 B CN 114666919B
Authority
CN
China
Prior art keywords
prach
random access
time domain
time slot
subcarrier interval
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210537147.9A
Other languages
Chinese (zh)
Other versions
CN114666919A (en
Inventor
宋怡昕
陈瑞欣
林力
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Shiju Network Technology Co ltd
Original Assignee
Guangzhou Shiju Network Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shiju Network Technology Co Ltd filed Critical Guangzhou Shiju Network Technology Co Ltd
Priority to CN202210537147.9A priority Critical patent/CN114666919B/en
Publication of CN114666919A publication Critical patent/CN114666919A/en
Application granted granted Critical
Publication of CN114666919B publication Critical patent/CN114666919B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0891—Non-scheduled access, e.g. ALOHA using a dedicated channel for access for synchronized access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application relates to the technical field of communication, and provides a random access method which is applied to terminal equipment, wherein the terminal equipment stores a random access configuration table, and the random access configuration table comprises a configuration mode of a time slot number corresponding to a default subcarrier interval; the random access method comprises the following steps: searching a synchronization signal block SSB, receiving a system message SIB1 broadcasted by a base station, wherein the SIB1 comprises an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, and the configuration mode of the time slot number corresponding to the non-default subcarrier interval meets the condition that a TDD period is matched with a configurable PRACH period; calculating a time domain position for sending the PRACH based on the indication parameters; and based on the time domain position of the PRACH, the RO is sent at the sending opportunity corresponding to the selected SSB to send the PRACH random access preamble so as to carry out the random access process. The configuration and scheduling of SSB and PRACH under multi-beam transmission can be realized more conveniently and rapidly.

Description

Random access method, information broadcasting device and electronic equipment
Technical Field
The present application relates to the field of communications technologies, and in particular, to a random access method, an information broadcasting method, an apparatus, an electronic device, and a computer-readable storage medium.
Background
At present, in order to meet the exponential growth demand of mobile data transmission, 5G and 5G-a systems are commonly used in FR2 high frequency band (also called millimeter wave band, which has weak diffraction capability but supports a bandwidth of 400MHz at maximum, so its data transmission rate is much higher than FR 1), and utilize more sufficient bandwidth resources to realize higher transmission rate.
Electromagnetic waves with higher frequency have the characteristics of large propagation attenuation and short transmission distance, and in order to increase the transmission distance, the 5G system discusses technologies such as massive Multiple Input Multiple Output (MIMO), precoding technology, analog beam forming, multi-beam management, and the like, wherein the precoding technology and the analog beam forming technology can obtain higher beam gain, and are key technologies for high-band wireless cellular communication.
In order to obtain higher beam gain, the base station forms narrow beams in a digital or analog manner, because the narrow beams can only cover a smaller area, a transmission manner of multi-beam scanning is required for initially accessing a synchronization information block (SSB) and a system broadcast message, that is, each beam sequentially covers different areas of a cell in a polling manner within a time period to realize complete coverage of the cell.
The 5G protocol designs a set of beam management mechanism to make the base station and the UE realize the alignment of the receiving and transmitting beams. Specifically, in the initial access process, the base station sends a plurality of SSBs (Synchronization Signal/PBCH, Synchronization Signal block) in a spatial beam scanning manner, the terminal device UE measures and selects the SSBs with the strongest signals, determines a physical random access channel PRACH transmitter according to the SSB index number and then sends PRACH, and the base station determines the beam where the UE is located according to the received PRACH, thereby completing the initial beam pairing.
As shown in fig. 1, a process of selecting an SSB beam by a terminal device in an initial access process of a communication system is that a base station transmits 8 SSBs in an SSB burst, and each SSB corresponds to a beam direction. The UE receives a plurality of SSBs, selects the SSB-i with the best SSB RSRP measurement result, and performs downlink synchronization according to the SSB-i; the SIB1 broadcasts the mapping relationship between SSB and PRACH resources (PRACH transmission opportunity and preamble sequence), and the UE transmits the preamble sequence at the PRACH transmission opportunity associated with SSB-i.
The base station determines the SSB-i wave beam selected by the UE according to the PRACH resource position and the PRACH sequence sent by the UE, and when the wave beam sends downlink RAR, the wave beam pairing between the base station and the UE in the initial access process is completed, and the base station and the UE1 communicate by using the wave beam i.
The protocol specifies that SSBs perform multi-beam transmission in a time-division multiplexed manner, and that five SSB distribution patterns Case a/B/C/D/E, specifying SSB time-domain locations in detail, are defined for different frequency ranges and different subcarrier spacings (SCS).
Corresponding to SSB beam scanning, a base station receives Physical Random Access Channels (PRACH) of multiple beams at multiple PRACH transmission opportunities (PRACH occupancy, ROs), where the ROs are time division multiplexed and/or frequency division multiplexed, and time domain positions of the ROs need to satisfy a protocol definition.
However, the FR2 of the existing FR2 frequency band and the random access configuration table of the unpaired spectrum (see table 1) have obvious configuration limitations, and in the high frequency band (for example, FR2 millimeter wave), the PRACH transmission opportunity (RO) time domain configuration table with a subcarrier spacing of 120kHz in the 5G protocol only contains configuration options of 2, 4, 8, 10, 16, 32 time slots as a period, and does not contain an option of 5 time slots as a period. For the SSB-PRACH multi-beam transmission requirement of subcarrier interval of 120kHz and TDD period of 5 time slots, the configurable PRACH period in the protocol is not matched with the TDD period, and the SSB beam and the PRACH beam can not be mapped in one-to-one mode in a single TDD period, so that the problem of difficulty in configuration and scheduling of the SSB and the PRACH under multi-beam transmission is caused.
Disclosure of Invention
In view of this, the present application provides a random access method, an information broadcasting method, an apparatus, an electronic device, and a computer-readable storage medium, so as to solve the problem in the prior art that the configuration restriction exists in a random access configuration table of a high frequency band, and the PRACH period and the TDD period that can be configured in a protocol are not matched, which causes difficulty in configuring and scheduling an SSB and a PRACH under multi-beam transmission.
A first aspect of the present application provides a random access method, which is applied to a terminal device, where the terminal device stores a random access configuration table, and the random access configuration table includes a configuration manner of a time slot number corresponding to a default subcarrier interval; the random access method comprises the following steps:
searching a synchronization signal block SSB, receiving a system message SIB1 broadcasted by a base station, wherein the SIB1 comprises an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, and the configuration mode of the time slot number corresponding to the non-default subcarrier interval meets the condition that a TDD period is matched with an available PRACH period;
calculating a time domain position for sending the PRACH based on the indication parameters;
and based on the time domain position of the PRACH, the RO is sent at the sending opportunity corresponding to the selected SSB to send the PRACH random access preamble so as to carry out the random access process.
A second aspect of the present application provides an information broadcasting method applied to a base station, the information broadcasting method including:
broadcasting a synchronization signal block SSB and a system message SIB1, wherein the synchronization signal block SSB is used for downlink synchronization, the SIB1 includes an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, the configuration mode of the time slot number corresponding to the non-default subcarrier interval satisfies that a TDD period is matched with a configurable PRACH period, and the non-default subcarrier interval is different from a default subcarrier interval included in a random access configuration table stored by a terminal device;
and receiving the PRACH random access preamble and performing a random access process.
A third aspect of the present application provides a random access apparatus, which is applied to a terminal device, where the terminal device stores a random access configuration table, and the random access configuration table includes a configuration manner of a time slot number corresponding to a default subcarrier interval; the random access device includes:
a message receiving module, configured to search a synchronization signal block SSB, and receive a system message SIB1 broadcast by a base station, where the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, and the configuration mode of the slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches with a configurable PRACH cycle;
the position calculation module is used for calculating the time domain position of the PRACH based on the indication parameters;
and the random access module is used for sending the PRACH random access preamble at the sending opportunity RO corresponding to the selected SSB based on the time domain position of the PRACH so as to carry out the random access process.
A fourth aspect of the present application provides an information broadcasting apparatus applied to a base station, the information broadcasting apparatus including:
a broadcast synchronization module for broadcasting a synchronization signal block SSB and a system message SIB 1;
the synchronization signal block SSB is used for downlink synchronization, the SIB1 includes an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, the configuration mode of the time slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches with a configurable PRACH cycle, and the non-default subcarrier interval is different from a default subcarrier interval included in a random access configuration table stored in the terminal device;
and the access module is used for receiving the PRACH random access preamble and performing a random access process.
A fifth aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the random access methods of the present application or implements the information broadcasting method of the present application when executing the computer program.
A sixth aspect of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements any one of the random access methods of the present application or implements the information broadcasting method described herein.
Compared with the prior art, the application has the beneficial effects that:
the random access method provided by the application is applied to the terminal equipment, the terminal equipment stores a random access configuration table, and the random access configuration table comprises a configuration mode of a time slot number corresponding to a default subcarrier interval. In the random access method provided by the application, the terminal equipment receives a system message SIB1 broadcasted by the base station by searching a synchronization signal block SSB, and solves an indication parameter in SIB1, because the indication parameter is an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, the configuration mode of the time slot number corresponding to the non-default subcarrier interval can be found based on the indication parameter, so as to calculate a time domain position for sending the PRACH, and based on the time domain position for sending the PRACH, a PRACH random access preamble is sent at a sending opportunity RO corresponding to the selected SSB, so as to perform a random access process. The method includes that a default subcarrier interval can be a subcarrier interval corresponding to a random access configuration table in a default mode, for example, 60kHz, and a non-default subcarrier interval can be 120kHz, and therefore, through configuring indication parameters in system messages, terminal equipment determines PRACH (physical random access channel) sending opportunity (RO) time slot configuration of the non-default subcarrier interval based on the indication parameters, the configuration mode indicated by the indication parameters can be flexibly set on the basis of an original random access configuration table, and meets the requirement that a TDD period is matched with an available PRACH period, so that the problems that high-frequency band configuration options existing in the original random access configuration table and a configuration protocol are incomplete, the available PRACH period is not matched with the TDD period are solved, and configuration and scheduling of SSB and PRACH under multi-beam transmission can be conveniently and quickly achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a process of selecting an SSB beam by a terminal device during initial access of a communication system;
fig. 2 is a flowchart of an implementation of a random access method provided in an embodiment of the present application;
fig. 3 is a flowchart of an implementation of an information broadcasting method provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a random access apparatus provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of an information broadcasting apparatus provided in an embodiment of the present application;
fig. 6 is a schematic diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
The random Access method and the information broadcasting method in the embodiment of the present application may be applied to various communication systems, such as a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (Frequency Division Duplex, FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), or a 5G System.
As a communication system composed of a base station BS and a terminal apparatus UE in fig. 1, the random access method or the information broadcasting method in the present application is applicable to the communication system. The communication system comprises a base station BS and a terminal device UE, wherein the base station BS can provide communication coverage for an area and can communicate with the terminal device UE located in the area. In some embodiments, the base station BS may be a base station in a GSM system or a CDMA system, a base station in a WCDMA system, an evolved node b in an LTE system, or a base station in a 5G system.
A terminal Equipment UE (User Equipment) may refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.
To facilitate an understanding of the concepts of the present application, a brief introduction will be made below to some concepts involved in the present application.
The Synchronization Signal Block (SSB), which is a common Channel and signal in the NR system, such as a Synchronization Signal (SS) and a Physical Broadcast Channel (PBCH), may cover the whole cell in a multi-beam scanning manner, so as to facilitate the reception of the terminal devices in the cell. The multi-beam transmission of the synchronization signals is realized by defining SS/PBCH burst sets (burst sets), wherein one SS burst set comprises one or more SS/PBCH blocks (synchronization signal blocks SSBs for short), and one SSB is used for carrying the synchronization signals and the physical broadcast channels of one beam.
A Physical Random Access Channel (PRACH), which is a Physical Channel first sent by the UE when the UE initially accesses, and after receiving a PRACH response message (RAR), the UE sends an RRC Connection Request (RRC Connection Request) message on a PUSCH Channel according to information indicated by the base station for the 4G system to perform an RRC Connection establishment procedure; for the 5G system, the PUSCH after RAR carries an RRC Setup Request (RRC Setup Request) message.
In a beam management mechanism designed by a 5G protocol and used for enabling a base station and UE to realize receiving and transmitting beam alignment, an SSB beam and a PRACH beam have one-to-one, one-to-many or many-to-one mapping relationship, and specific mapping is determined by the base station. If the beam widths of the transmitting beam and the receiving beam on the base station side are the same as the beam directions, the SSB beam and the PRACH beam are in one-to-one relationship; if the transmitting beam width of the base station side is 1/N of the receiving beam width, the SSB beam and the PRACH beam are in a many-to-one relationship; if the base station side transmission beam width is N times of the receiving beam width, the SSB beam and the PRACH beam are in one-to-many relationship.
In order to completely receive a random access channel initiated by a terminal in any area within a cell coverage area, a base station needs to maintain a corresponding relationship between an SSB beam and a PRACH beam, and correctly schedule downlink data transmission and uplink data reception under different beams.
The terminal device determines the PRACH transmission opportunity index number according to the selected SSB index number, for example, a specific PRACH time domain resource configuration may be determined according to a PRACH-configuration index field of an SIB1 system message, and transmits a PRACH signal.
The time domain position of the PRACH needs to meet the protocol definition, the FR2 and the random access configuration table of the unpaired spectrum are shown in table 1, the PRACH-configuration index field in the SIB1 system message broadcast by the base station is the index number of table 1, and the terminal device obtains the format of the random access preamble sequence, the system frame number, the slot number, the PRACH start symbol, the number of PRACH slots in one 60kHz slot (reference slot), the number of time domain transmission opportunities RO in one PRACH slot, and the number of persistent symbols of each PRACH sequence by table lookup.
Referring to table 1, the slot number takes 60kHz subcarrier spacing as a calculation reference, the slot numbers are sorted from 0, and the 120kHz subcarrier spacing needs to be converted, where slot number 4 of the 60kHz subcarrier spacing in table 1 corresponds to slot number 8 of the 120kHz subcarrier spacing, slot number 9 of the 60kHz subcarrier spacing in table 1 corresponds to slot number 18 of the 120kHz subcarrier spacing, and so on.
To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 2, it shows a flowchart of an implementation of the random access method provided in the embodiment of the present application, which is detailed as follows:
the random access method provided by the application is applied to a terminal device, the terminal device stores a random access configuration table, and the random access configuration table includes a configuration mode of a time slot number corresponding to a default subcarrier interval, as shown in table 1, the random access configuration table is FR2 and an unpaired spectrum.
The random access method provided by the application specifically comprises the following steps:
in step 201, searching a synchronization signal block SSB, and receiving a system message SIB1 broadcast by a base station, where the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval;
in the embodiment of the present application, the terminal device searches for a synchronization signal block SSB, receives a system message SIB1 broadcast by the base station, and parses a system message SIB1, where a non-default subcarrier interval refers to a subcarrier interval different from a default subcarrier interval in a random access configuration table, for example, the default subcarrier interval is 60kHz, and the non-default subcarrier interval may be 120 kHz. The configuration mode of the time slot number corresponding to the non-default subcarrier interval needs to meet the requirement that the TDD period is matched with the configurable PRACH period.
In one example, to meet the requirement that the TDD period matches the available PRACH period, the meaning of the parameters in the random access configuration table may be performedRedefining, and indicating the redefined parameter meaning and protocol rule by using the indication parameter. For example, a prachScs120kHz parameter may be newly added to the RACH-ConfigGeneric configuration, the prachScs120kHz parameter may be used to indicate that the slot number in the random access configuration table is based on the subcarrier spacing of 120kHz, when the prachScs120kHz parameter is enabled, the PRACH time domain position calculation formula is not changed, the definition of each parameter is not changed, the number of PRACH slots in one reference slot is defined as 1, and the offset of the PRACH slot from the reference slot is defined
Figure 706733DEST_PATH_IMAGE001
Defined no longer by the original protocol
Figure 762152DEST_PATH_IMAGE002
And (4) calculating mode.
In another example, in order to meet the requirement that the TDD period matches the available PRACH period, the random access configuration table may be extended, and the protocol rule of the extended configuration table is indicated by an indication parameter. For example, a value range of a high-level configuration parameter prach-configuration index in the random access parameter configuration table is inter (0-255), an extended configuration table (as shown in table 2) may be added, and an extended parameter prach-configuration index-vXX may be added as an indication parameter in the extended configuration table to indicate a timeslot configuration manner of the extended table, and a value range of the newly added extended parameter prach-configuration index-vXX is inter (256-312) (as shown in table 2); the PRACH time domain configuration may be implemented by querying the extended configuration table when the indicated parameter in the SIB1 includes the PRACH-configuration index-vXX field.
In step 202, calculating a time domain position for transmitting the PRACH based on the indication parameter;
as in the random access configuration table provided in table 1, for a 120kHz subcarrier spacing, the time domain position calculation formula for the PRACH transmission is as follows:
Figure 498026DEST_PATH_IMAGE003
wherein,
Figure 369030DEST_PATH_IMAGE004
which represents the position in the time domain,
Figure 772330DEST_PATH_IMAGE005
which indicates the PRACH starting symbol and,
Figure 437798DEST_PATH_IMAGE006
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure 660969DEST_PATH_IMAGE007
indicates the number of persistent symbols per PRACH channel,
Figure 834199DEST_PATH_IMAGE008
indicating the offset of the PRACH slot from the reference slot.
Default PRACH time slot offset relative to reference time slot for 60kHz sub-carrier spacing as defined by the original protocol
Figure 826425DEST_PATH_IMAGE008
Is 0; for 120kHz subcarrier spacing, look at the seventh column of the table, if the number of PRACH slots in one 60kHz slot =1, then
Figure 990691DEST_PATH_IMAGE009
Otherwise
Figure 904420DEST_PATH_IMAGE010
。
Illustratively, referring to table 1, line 1, the number of PRACH slots in the reference slot (60 kHz subcarrier spacing) is 2, the slot number of the reference slot is (4, 9, 14, 19, 24, 29, 34, 39), and for 120kHz subcarrier spacing, the offset of the PRACH slot from the reference slot is
Figure 382806DEST_PATH_IMAGE010
The PRACH slot number should be (8, 9, 18, 19, 28, 29, 38, 39, 48, 49, 58, 59, 68, 69, 78, 79) and its corresponding period is 10 hoursSlots (slot numbers start from 0, 8, 9 are the last two slots of 10 slots).
Referring to line 2 of table 1, the number of PRACH slots in the reference slot (60 kHz subcarrier spacing) is 1, the slot number of the reference slot is (3, 7, 11, 15, 19, 23, 27, 31, 35, 39), and the offset of the PRACH slot from the reference slot for the 120kHz subcarrier spacing
Figure 993653DEST_PATH_IMAGE009
Then the PRACH slot number shall be (7, 15, 23, 31, 39, 47, 55, 63, 71, 79), which corresponds to a period of 8 slots (slot number starts from 0, 7 is the last 1 slot of 8 slots).
By analogy, according to the original protocol definition, for a 120kHz subcarrier spacing, no row in table 1 can obtain a slot number corresponding to a period of 5 slots (4, 9, 14, …) (the slot number starts from 0, and 4 is the last 1 slot in 5 slots).
The above is the protocol definition in the prior art and the calculation formula for calculating the time domain position of the PRACH transmission, as the default time domain position calculation formula.
In one embodiment, the step 202 may include:
if the indication parameter comprises an enabling field of the non-default subcarrier interval, defining the number of PRACH time slots in one reference time slot as 1 by taking the non-default subcarrier interval as a calculation reference, and defining the offset of the PRACH time slot relative to the reference time slot
Figure 797661DEST_PATH_IMAGE001
And calculating the time domain position of the PRACH according to a default time domain position calculation formula.
And if the indication parameter does not comprise an enabling field of the non-default subcarrier interval, taking the default subcarrier interval as a calculation reference, and calculating the time domain position for sending the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
Illustratively, the default subcarrier spacing is 60kHz, the prachScs120kHz parameter can be newly added in the RACH-ConfigGeneric configuration as an indication parameter, and the redefined parameter meaning and protocol rule are indicated by using the indication parameter.
When the indication parameter comprises a prachScs120kHz enabling field, the 120kHz is taken as a calculation reference, the number of PRACH time slots in one reference time slot is defined to be 1, and the offset of the PRACH time slot relative to the reference time slot is defined to be 1
Figure 995425DEST_PATH_IMAGE011
That is, the time domain position of the PRACH to be transmitted is calculated according to a default time domain position calculation formula without performing time slot offset calculation.
In this embodiment, when the indication parameter includes a prachScs120kHz enable field, the number of PRACH slots in one reference slot is 1, and the offset of the PRACH slot from the reference slot is calculated based on 120kHz
Figure 746343DEST_PATH_IMAGE011
If table 1, line 1 is selected, then the PRACH slot is (4, 9, 14, 19, 24, 29, 34, 39), corresponding to a period of 5 slots (slot number starts from 0, 4 is the last 1 slot of the 5 slots). Therefore, the problem that no time slot number configuration with 5 time slots corresponding to the period is available in the random access configuration table (such as table 1) for the 120kHz subcarrier interval is solved.
And when the prachScs120kHz parameter does not comprise a 120kHz enabling field, taking 60kHz as a calculation reference, and calculating the time domain position for sending the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
In an additional embodiment, the terminal device may further store an extended time domain configuration table, where the extended time domain configuration table includes an extended configuration mode for a time slot number corresponding to a default subcarrier interval; specifically, the step 202 may include:
if the indication parameter comprises a preset extension parameter field, inquiring an extension time domain configuration table, and defining a PRACH time slot in a reference time slot by taking a default subcarrier interval as a calculation referenceNumber 1, offset of PRACH time slot from reference time slot
Figure 713162DEST_PATH_IMAGE009
And calculating the time domain position of the PRACH according to a new time domain position calculation formula.
If the indication parameter does not include the preset extension parameter field, inquiring a random access configuration table, taking the default subcarrier interval as a calculation reference, and calculating the time domain position of the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
For example, the default subcarrier spacing in the random access configuration table is 60kHz, an extended configuration table may be added, as shown in table 2, and the new extended parameter prach-configuration index-vXX has a value range of inter (256-.
When the indication parameter contains a high-level configuration parameter PRACH-configuration index-vXX field, inquiring an extended configuration table, defining the number of PRACH time slots in a reference time slot as 1 and the offset of the PRACH time slot relative to the reference time slot by taking a default subcarrier interval as a calculation reference
Figure 953650DEST_PATH_IMAGE009
And calculating the time domain position of the PRACH according to a new time domain position calculation formula.
In this embodiment of the present application, the new time domain position calculation formula may include:
Figure 373130DEST_PATH_IMAGE012
wherein,
Figure 494451DEST_PATH_IMAGE004
which represents the position in the time domain,
Figure 315777DEST_PATH_IMAGE005
which indicates the PRACH starting symbol and,
Figure 930429DEST_PATH_IMAGE013
indicates the number of PRACH transmission opportunities in one PRACH slot,
Figure 837205DEST_PATH_IMAGE007
indicates the number of persistent symbols per PRACH channel,
Figure 726663DEST_PATH_IMAGE008
indicating the offset of the PRACH slot from the reference slot.
Illustratively, when the indication parameter contains the field of the high-level configuration parameter prach-configuration index-vXX, the extended configuration table is queried, and if the 256 index number of the extended configuration table is queried, the slot number indicated by the extended configuration table is (2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 32.5, 35, 37.5, 40). Then, according to the new protocol definition, the number of PRACH slots in one reference slot corresponding to the non-default subcarrier spacing (120 kHz) is 1, and the PRACH slot is offset from the reference slot
Figure 933654DEST_PATH_IMAGE009
Then the PRACH slot number should be (4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79). The time slot number 2.5 is converted into a time slot number 5, the time slot number offset needs to be reduced by 1 according to a new time domain position calculation formula, the time slot number offset needs to be reduced by 1, the time slot number offset needs to be reduced by 5 to obtain 4, and the other time slot number calculation modes are analogized in the same way. Therefore, the corresponding period of the PRACH slot number according to the extended configuration table is 5 slots (the slot number starts from 0, and 4 is the last 1 slot in the 5 slots). The problem that no time slot number configuration with 5 time slots corresponding to the period is available in a random access configuration table (such as table 1) for the 120kHz subcarrier interval is solved.
And when the indication parameter does not contain a high-level configuration parameter PRACH-configuration index-vXX, inquiring a random access configuration table, taking the default subcarrier interval as a calculation reference, and calculating the time domain position of the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
The two embodiments provided by the application optimize the PRACH time domain position calculation mode, support the PRACH period of 5 time slots, enable SSB wave beams and PRACH wave beams to be mapped in a one-to-one manner in a single TDD period, solve the problem that the PRACH period of the 5 time slots of the TDD period is not matched with the TDD period under the subcarrier interval of 120kHz, and solve the problem that the SSB and PRACH are difficult to configure and schedule under the multi-beam transmission of the 5 time slots of the TDD period.
In step 203, based on the time domain position of the PRACH transmission, the PRACH random access preamble is transmitted at the transmission opportunity RO corresponding to the selected SSB, so as to perform a random access procedure.
In the embodiment of the present application, after the time domain position for sending the PRACH is calculated, the starting position of the PRACH preamble in one subframe may be calculated according to the 3GPP standard, so that the PRACH random access preamble is sent at the sending opportunity RO corresponding to the selected SSB, thereby implementing the random access process with the base station.
In the embodiment of the present application, the method for selecting an SSB may be performed based on the prior art, for example, may be implemented based on the method for selecting an SSB described in the background of the present application, and is not described herein again.
As can be seen from the above, in the random access method provided in the present application, the terminal device receives the system message SIB1 broadcast by the base station by searching the synchronization signal block SSB, and solves the indication parameter in the SIB1, and since the indication parameter is an indication parameter for indicating a configuration manner of a slot number corresponding to a non-default subcarrier interval, the configuration manner of the slot number corresponding to the non-default subcarrier interval can be found based on the indication parameter, so as to calculate a time domain position for transmitting the PRACH, and based on the time domain position for transmitting the PRACH, the PRACH random access preamble is transmitted at the transmission opportunity RO corresponding to the selected SSB, so as to perform the random access procedure. The method includes that a default subcarrier interval can be a subcarrier interval corresponding to a random access configuration table in a default mode, for example, 60kHz, and a non-default subcarrier interval can be 120kHz, and therefore, through configuring indication parameters in system messages, terminal equipment determines PRACH (physical random access channel) sending opportunity (RO) time slot configuration of the non-default subcarrier interval based on the indication parameters, the configuration mode indicated by the indication parameters can be flexibly set on the basis of an original random access configuration table, and meets the requirement that a TDD period is matched with an available PRACH period, so that the problems that high-frequency band configuration options existing in the original random access configuration table and a configuration protocol are incomplete, the available PRACH period is not matched with the TDD period are solved, and configuration and scheduling of SSB and PRACH under multi-beam transmission can be conveniently and quickly achieved.
Referring to fig. 3, it shows a flowchart of an implementation of the information broadcasting method provided in the embodiment of the present application, which is detailed as follows:
in step 301, a synchronization signal block SSB and a system message SIB1 are broadcast, where the synchronization signal block SSB is used for downlink synchronization, and the SIB1 includes an indication parameter for indicating a configuration manner of a slot number corresponding to a non-default subcarrier interval;
in step 302, a PRACH random access preamble is received and a random access procedure is performed.
The embodiment of the application is applied to a base station, and corresponds to the process of a random access method of terminal equipment, the base station broadcasts a synchronous signal block SSB and a system message SIB1, so that the terminal equipment can perform downlink synchronization based on the synchronous signal block SSB, analyzes an indication parameter based on the system message SIB1, calculates the time domain position of PRACH transmission according to the indication parameter, and transmits a PRACH random access preamble at a transmission opportunity RO corresponding to a selected SSB to perform a random access process.
The configuration mode of the time slot number corresponding to the non-default subcarrier interval satisfies that the TDD period is matched with the configurable PRACH period, and the non-default subcarrier interval is different from the default subcarrier interval included in the random access configuration table stored in the terminal equipment. For example, the default subcarrier spacing may be 60kHz and the non-default subcarrier spacing may be 120 kHz.
It should be noted that, for convenience and simplicity of description, it may be clearly understood by those skilled in the art that, for a specific working process of the terminal device performing the random access after the base station performs the information broadcast, reference may be made to a corresponding process in the foregoing random access method embodiment, and a description is not repeated here.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The following are apparatus embodiments of the present application, and for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 4 shows a schematic structural diagram of a random access apparatus provided in an embodiment of the present application, and for convenience of description, only parts related to the embodiment of the present application are shown, which are detailed as follows:
the method is applied to terminal equipment, wherein the terminal equipment stores a random access configuration table, and the random access configuration table comprises a configuration mode of a time slot number corresponding to a default subcarrier interval; as shown in fig. 4, the random access apparatus 4 includes: a message receiving module 41, a location calculating module 42 and a random access module 43.
A message receiving module 41, configured to search a synchronization signal block SSB, and receive a system message SIB1 broadcasted by a base station, where the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, and the configuration mode of the slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches with a configurable PRACH cycle;
a position calculation module 42, configured to calculate a time domain position for sending the PRACH based on the indication parameter;
and a random access module 43, configured to send a PRACH random access preamble at a sending opportunity RO corresponding to the selected SSB based on the time domain location of the sending PRACH, so as to perform a random access procedure.
In an embodiment, the position calculating module 42 is specifically configured to, if the indication parameter includes an enable field of a non-default subcarrier interval, define the number of PRACH slots in a reference slot as 1 and an offset of the PRACH slot from the reference slot by using the non-default subcarrier interval as a calculation reference
Figure 515945DEST_PATH_IMAGE014
And calculating the time domain position of the PRACH according to a default time domain position calculation formula.
Further, the position calculating module 42 is specifically configured to, if the indication parameter does not include the enable field of the non-default subcarrier interval, calculate the time domain position of the PRACH transmission according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot from the reference time slot, and a default time domain position calculation formula.
In another embodiment, the terminal device further stores an extended time domain configuration table, where the extended time domain configuration table includes an extended configuration manner of a time slot number corresponding to a default subcarrier interval, and the position calculation module 42 is specifically configured to, if the indication parameter includes a preset extended parameter field, query the extended time domain configuration table, define, with the default subcarrier interval as a calculation reference, that the number of PRACH time slots in one reference time slot is 1, and define an offset of the PRACH time slot with respect to the reference time slot
Figure 408552DEST_PATH_IMAGE015
And calculating the time domain position of the PRACH according to a new time domain position calculation formula.
Further, the position calculating module 42 is specifically configured to, if the indication parameter does not include the preset extension parameter field, query the random access configuration table, and calculate the time domain position of the PRACH transmission according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot from the reference time slot, and a default time domain position calculation formula.
Further, the new time domain position calculation formula includes:
Figure 101702DEST_PATH_IMAGE012
wherein,
Figure 835303DEST_PATH_IMAGE004
which represents the position in the time domain,
Figure 588495DEST_PATH_IMAGE005
which indicates the PRACH starting symbol and,
Figure 469863DEST_PATH_IMAGE006
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure 966704DEST_PATH_IMAGE016
indicates the number of persistent symbols per PRACH channel,
Figure 882707DEST_PATH_IMAGE008
indicating the offset of the PRACH slot from the reference slot.
Further, the default time domain position calculation formula includes:
Figure 39757DEST_PATH_IMAGE003
wherein,
Figure 611683DEST_PATH_IMAGE004
which represents the position in the time domain,
Figure 646636DEST_PATH_IMAGE005
which indicates the PRACH starting symbol and,
Figure 417145DEST_PATH_IMAGE006
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure 246561DEST_PATH_IMAGE007
indicates the number of persistent symbols per PRACH channel,
Figure 102522DEST_PATH_IMAGE008
indicating the offset of the PRACH slot from the reference slot.
Fig. 5 shows a schematic structural diagram of an information broadcasting apparatus provided in an embodiment of the present application, and for convenience of description, only the parts related to the embodiment of the present application are shown, and detailed descriptions are as follows:
an information broadcasting apparatus 5 applied to a base station, the information broadcasting apparatus 5 comprising: a broadcast synchronization module 51 and an access module 52.
A broadcast synchronization module 51 for broadcasting a synchronization signal block SSB and a system message SIB 1; the synchronization signal block SSB is configured to perform downlink synchronization, the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, the configuration mode of the slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches a configurable PRACH cycle, and the non-default subcarrier interval is different from a default subcarrier interval included in a random access configuration table stored in a terminal device.
An access module 52, configured to receive the PRACH random access preamble, and perform a random access procedure.
It should be noted that, for the convenience and brevity of description, the specific working procedure of the above-described apparatus may refer to the corresponding procedure in the foregoing method embodiment, and the description is not repeated herein.
As can be seen from the above, in the random access method provided in the present application, the terminal device receives the system message SIB1 broadcast by the base station by searching the synchronization signal block SSB, and solves the indication parameter in the SIB1, and since the indication parameter is an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, the configuration mode of the slot number corresponding to the non-default subcarrier interval can be found based on the indication parameter, so as to calculate a time domain position for transmitting a PRACH, and based on the time domain position for transmitting the PRACH, the PRACH random access preamble is transmitted at a transmission opportunity RO corresponding to the selected SSB, so as to perform a random access procedure. The method includes that a default subcarrier interval can be a subcarrier interval corresponding to a random access configuration table in a default mode, for example, 60kHz, and a non-default subcarrier interval can be 120kHz, and therefore, through configuring indication parameters in system messages, terminal equipment determines PRACH (physical random access channel) sending opportunity (RO) time slot configuration of the non-default subcarrier interval based on the indication parameters, the configuration mode indicated by the indication parameters can be flexibly set on the basis of an original random access configuration table, and meets the requirement that a TDD period is matched with an available PRACH period, so that the problems that high-frequency band configuration options existing in the original random access configuration table and a configuration protocol are incomplete, the available PRACH period is not matched with the TDD period are solved, and configuration and scheduling of SSB and PRACH under multi-beam transmission can be conveniently and quickly achieved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device for executing a random access method or an information broadcasting method according to an embodiment of the present disclosure, where the electronic device may be the above-mentioned base station or terminal device, and as shown in the figure, the electronic device 6 may include: at least one processor 60, e.g. a CPU, at least one memory 61 and a computer program 62 stored on the memory 61 executable by the processor 60. Wherein these components may be connected to each other by a communication bus. The memory 61 may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 61 may alternatively be at least one memory device located remotely from the aforementioned processor. The memory 61 stores a computer program which, when executed by the processor 60, causes the electronic device to perform the method process of fig. 2 or 3 as described above.
It will be appreciated that the configuration shown in fig. 6 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 6 or have a different configuration than shown in fig. 6. The components shown in fig. 6 may be implemented in hardware, software, or a combination thereof.
The present application provides a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program performs the method process in the method embodiment shown in fig. 2 or fig. 3.
The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Table 1 table of random access configurations for FR2 and unpaired spectrum
Figure 206744DEST_PATH_IMAGE017
Figure 64716DEST_PATH_IMAGE018
Figure 330613DEST_PATH_IMAGE019
Figure 611552DEST_PATH_IMAGE020
Figure 253886DEST_PATH_IMAGE021
Figure 733409DEST_PATH_IMAGE022
Figure 170207DEST_PATH_IMAGE023
Figure 759DEST_PATH_IMAGE024
Figure 673881DEST_PATH_IMAGE025
Figure 7910DEST_PATH_IMAGE026
Figure 615609DEST_PATH_IMAGE027
Figure 871141DEST_PATH_IMAGE028
Figure 589698DEST_PATH_IMAGE029
Figure 309393DEST_PATH_IMAGE030
Figure 87993DEST_PATH_IMAGE031
Figure 126094DEST_PATH_IMAGE032
TABLE 2 FR2 and tables of spreading configurations for unpaired spectrum
Figure 851604DEST_PATH_IMAGE033
Figure 425805DEST_PATH_IMAGE034
Figure 578569DEST_PATH_IMAGE035
Figure 605431DEST_PATH_IMAGE036
Figure 931370DEST_PATH_IMAGE037
Figure 796295DEST_PATH_IMAGE038
Figure 916698DEST_PATH_IMAGE039
Figure 430856DEST_PATH_IMAGE040

Claims (9)

1. A random access method is characterized in that the method is applied to terminal equipment, the terminal equipment stores a random access configuration table, and the random access configuration table comprises a configuration mode of a time slot number corresponding to a default subcarrier interval; the random access method comprises the following steps:
searching a synchronization signal block SSB, and receiving a system message SIB1 broadcasted by a base station, wherein the SIB1 comprises an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, and the configuration mode of the time slot number corresponding to the non-default subcarrier interval meets the condition that a TDD period is matched with a configurable PRACH period;
calculating a time domain position for sending the PRACH based on the indication parameter;
based on the time domain position of the PRACH, the PRACH random access preamble is sent at the sending opportunity RO corresponding to the selected SSB so as to carry out the random access process;
wherein the calculating a time domain position for transmitting the PRACH based on the indication parameter comprises: if the indication parameter comprises an enabling field of the non-default subcarrier interval, defining the number of PRACH time slots in one reference time slot as 1 by taking the non-default subcarrier interval as a calculation reference, and defining the offset of the PRACH time slot relative to the reference time slot
Figure FDA0003750986620000011
Calculating the time domain position of the PRACH according to a default time domain position calculation formula;
or, the terminal device further stores an extended time domain configuration table, and the extended time domain configuration tableThe table comprises an extended configuration mode of a time slot number corresponding to a default subcarrier interval; the calculating a time domain position for transmitting the PRACH based on the indication parameter comprises: if the indication parameter comprises a preset extension parameter field, inquiring an extension time domain configuration table, defining the number of PRACH time slots in a reference time slot as 1 by taking a default subcarrier interval as a calculation reference, and defining the offset of the PRACH time slot relative to the reference time slot
Figure FDA0003750986620000012
Calculating the time domain position of the PRACH according to a new time domain position calculation formula;
the new time domain position calculation formula includes:
Figure FDA0003750986620000013
where l denotes the time domain position, l 0 Which indicates the PRACH starting symbol and,
Figure FDA0003750986620000014
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure FDA0003750986620000021
indicates the number of persistent symbols per PRACH channel,
Figure FDA0003750986620000022
indicating the offset of the PRACH time slot relative to the reference time slot;
wherein the default subcarrier spacing comprises 60KHz and the non-default subcarrier spacing comprises 120 KHz.
2. The random access method of claim 1, wherein the calculating a time domain location for transmitting a PRACH based on the indication parameter further comprises:
and if the indication parameter does not comprise an enabling field of the non-default subcarrier interval, taking the default subcarrier interval as a calculation reference, and calculating the time domain position for sending the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
3. The random access method of claim 1, wherein the calculating a time domain location for transmitting a PRACH based on the indication parameter further comprises:
if the indication parameter does not include the preset extension parameter field, inquiring a random access configuration table, taking the default subcarrier interval as a calculation reference, and calculating the time domain position of the PRACH according to the PRACH time slot number in one reference time slot indicated in the random access configuration table, the offset of the default PRACH time slot relative to the reference time slot and a default time domain position calculation formula.
4. A random access method according to any of claims 1 to 3, wherein the default time domain location calculation formula comprises:
Figure FDA0003750986620000023
wherein l represents a time domain position, l 0 The PRACH start symbol is represented by a PRACH starting symbol,
Figure FDA0003750986620000024
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure FDA0003750986620000025
indicates the number of persistent symbols per PRACH channel,
Figure FDA0003750986620000026
indicating the offset of the PRACH slot from the reference slot.
5. An information broadcasting method is applied to a base station, and comprises the following steps:
broadcasting a synchronization signal block SSB and a system message SIB1, wherein the synchronization signal block SSB is used for downlink synchronization, the SIB1 includes an indication parameter for indicating a configuration mode of a time slot number corresponding to a non-default subcarrier interval, the configuration mode of the time slot number corresponding to the non-default subcarrier interval satisfies that a TDD period matches with a configurable PRACH period, and the non-default subcarrier interval is different from a default subcarrier interval included in a random access configuration table stored by a terminal device;
receiving PRACH random access preamble, and performing a random access process;
the indication parameter comprises an enabling field of a non-default subcarrier interval, or the indication parameter comprises a preset extension parameter field;
wherein the default subcarrier spacing comprises 60KHz and the non-default subcarrier spacing comprises 120 KHz.
6. A random access device is characterized in that the random access device is applied to terminal equipment, the terminal equipment stores a random access configuration table, and the random access configuration table comprises a configuration mode of a time slot number corresponding to a default subcarrier interval; the random access apparatus includes:
a message receiving module, configured to search a synchronization signal block SSB, and receive a system message SIB1 broadcast by a base station, where the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, and the configuration mode of the slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches with a configurable PRACH cycle;
a position calculation module, configured to calculate a time domain position for sending the PRACH based on the indication parameter;
a random access module, configured to send a PRACH random access preamble at a sending opportunity RO corresponding to the selected SSB based on the time domain position of the sending PRACH, so as to perform a random access procedure;
wherein the position calculating module is specifically configured to define one by taking the non-default subcarrier spacing as a calculation reference if the indication parameter includes an enable field of the non-default subcarrier spacingThe PRACH time slot number in the reference time slot is 1, and the deviation of the PRACH time slot relative to the reference time slot
Figure FDA0003750986620000031
Calculating the time domain position of the PRACH according to a default time domain position calculation formula;
or, the terminal device further stores an extended time domain configuration table, where the extended time domain configuration table includes an extended configuration mode for a time slot number corresponding to a default subcarrier interval; the position calculating module is specifically configured to, if the indication parameter includes a preset extension parameter field, query an extension time domain configuration table, define, with a default subcarrier interval as a calculation reference, the number of PRACH slots in one reference slot as 1, and define an offset of the PRACH slot with respect to the reference slot
Figure FDA0003750986620000041
Calculating the time domain position of the PRACH according to a new time domain position calculation formula;
the new time domain position calculation formula includes:
Figure FDA0003750986620000042
where l denotes the time domain position, l 0 Which indicates the PRACH starting symbol and,
Figure FDA0003750986620000043
indicates the number of PRACH transmission opportunities in one PRACH time slot,
Figure FDA0003750986620000044
indicates the number of persistent symbols per PRACH channel,
Figure FDA0003750986620000045
indicating the offset of the PRACH time slot relative to the reference time slot;
wherein the default subcarrier spacing comprises 60KHz and the non-default subcarrier spacing comprises 120 KHz.
7. An information broadcasting apparatus applied to a base station, the information broadcasting apparatus comprising:
a broadcast synchronization module for broadcasting a synchronization signal block SSB and a system message SIB 1;
the synchronization signal block SSB is configured for downlink synchronization, the SIB1 includes an indication parameter for indicating a configuration mode of a slot number corresponding to a non-default subcarrier interval, where the configuration mode of the slot number corresponding to the non-default subcarrier interval satisfies that a TDD cycle matches with a configurable PRACH cycle, and the non-default subcarrier interval is different from a default subcarrier interval included in a random access configuration table stored in a terminal device;
an access module, configured to receive a PRACH random access preamble, and perform a random access procedure;
the indication parameter comprises an enabling field of a non-default subcarrier interval, or the indication parameter comprises a preset extension parameter field;
wherein the default subcarrier spacing comprises 60KHz and the non-default subcarrier spacing comprises 120 KHz.
8. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the random access method of any of claims 1 to 4 above or the information broadcasting method of claim 5 above when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the random access method of any one of claims 1 to 4 above or the information broadcasting method of claim 5 above.
CN202210537147.9A 2022-05-18 2022-05-18 Random access method, information broadcasting device and electronic equipment Active CN114666919B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210537147.9A CN114666919B (en) 2022-05-18 2022-05-18 Random access method, information broadcasting device and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210537147.9A CN114666919B (en) 2022-05-18 2022-05-18 Random access method, information broadcasting device and electronic equipment

Publications (2)

Publication Number Publication Date
CN114666919A CN114666919A (en) 2022-06-24
CN114666919B true CN114666919B (en) 2022-08-30

Family

ID=82038026

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210537147.9A Active CN114666919B (en) 2022-05-18 2022-05-18 Random access method, information broadcasting device and electronic equipment

Country Status (1)

Country Link
CN (1) CN114666919B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809602A (en) * 2017-05-05 2018-11-13 北京三星通信技术研究有限公司 Base station, terminal and random access guiding detection, random access channel configuration method
CN110809899A (en) * 2017-10-20 2020-02-18 Oppo广东移动通信有限公司 Method for transmitting data, terminal equipment and network equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102224248B1 (en) * 2017-06-09 2021-03-08 삼성전자주식회사 Method for establishing protocol data unit in communication system
CN110167164B (en) * 2018-02-14 2024-08-09 华为技术有限公司 Method for configuring random access resource and communication equipment
CN113645699B (en) * 2020-05-11 2024-05-28 大唐移动通信设备有限公司 Time domain resource allocation method and terminal
WO2022039406A1 (en) * 2020-08-19 2022-02-24 Samsung Electronics Co., Ltd. Communication method and device for reduced-capability ue in wireless communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809602A (en) * 2017-05-05 2018-11-13 北京三星通信技术研究有限公司 Base station, terminal and random access guiding detection, random access channel configuration method
CN110809899A (en) * 2017-10-20 2020-02-18 Oppo广东移动通信有限公司 Method for transmitting data, terminal equipment and network equipment

Also Published As

Publication number Publication date
CN114666919A (en) 2022-06-24

Similar Documents

Publication Publication Date Title
US12041653B2 (en) Method and device for wireless communication on an unlicensed spectrum
US10893429B2 (en) Uplink measurement signal indication method and apparatus
EP3691168B1 (en) Method for transmitting and receiving srs and communication device therefor
US20180227890A1 (en) Method for transmitting control information in wireless communications system, base station, and user equipment
WO2020248287A1 (en) Random access method and device
EP3873160B1 (en) Method and device for transmitting ssb in an unlicensed spectrum
US10880846B2 (en) Method for signal transmission, network device and terminal device
TW201822485A (en) Method, terminal equipment, and network equipment for transmitting signal
US20190098650A1 (en) Information transmission method and device
AU2017442042A1 (en) Wireless communication method and apparatus
US11425759B2 (en) Method for link reconfiguration and terminal device
CN114666919B (en) Random access method, information broadcasting device and electronic equipment
EP4383913A1 (en) Wireless communication method and communication apparatus
WO2023070436A1 (en) Physical random access channel enhancements in new radio
US20210051725A1 (en) Random access method, network device and terminal device
US20210251015A1 (en) Random access channel and associated uplink data channel structure construction
CN117715232A (en) Random access method, communication equipment and storage medium
CA3163123A1 (en) Random access method and apparatus
WO2024164964A1 (en) Communication method and communication apparatus
WO2022206581A1 (en) Method and apparatus for resource mapping
WO2024208041A1 (en) Reference signal indication method, apparatus, and system
EP4387306A1 (en) Method and apparatus for measuring interference
CN115733598A (en) Communication method and communication device
CN116669216A (en) PRACH repeated transmission method, device, apparatus and storage medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 519000, Room 101, 201, 301, 401, Building 6, No. 1099 Jinzhou Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province

Patentee after: Guangdong Shiju Network Technology Co.,Ltd.

Country or region after: China

Address before: 510000 self compiled a, unit 1902, No. 374 BIS, Beijing Road, Yuexiu District, Guangzhou, Guangdong Province

Patentee before: Guangzhou Shiju Network Technology Co.,Ltd.

Country or region before: China