CN112543500A - Random access method, device, computer equipment and storage medium - Google Patents

Random access method, device, computer equipment and storage medium Download PDF

Info

Publication number
CN112543500A
CN112543500A CN201910893398.9A CN201910893398A CN112543500A CN 112543500 A CN112543500 A CN 112543500A CN 201910893398 A CN201910893398 A CN 201910893398A CN 112543500 A CN112543500 A CN 112543500A
Authority
CN
China
Prior art keywords
resource
original
mirror image
resources
mirror
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.)
Granted
Application number
CN201910893398.9A
Other languages
Chinese (zh)
Other versions
CN112543500B (en
Inventor
彭岳峰
杨小平
周雄
张全君
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.)
Guangzhou Haige Communication Group Inc Co
Original Assignee
Guangzhou Haige Communication Group Inc Co
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 Haige Communication Group Inc Co filed Critical Guangzhou Haige Communication Group Inc Co
Priority to CN201910893398.9A priority Critical patent/CN112543500B/en
Publication of CN112543500A publication Critical patent/CN112543500A/en
Application granted granted Critical
Publication of CN112543500B publication Critical patent/CN112543500B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Landscapes

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

Abstract

The application relates to a random access method, a random access device, computer equipment and a storage medium. The method comprises the following steps: the base station reserves mirror image resources for the original resources by determining the original resources corresponding to the parameter information after initializing the system, respectively sends downlink synchronous signals to the terminal through the original resources and the mirror image resources, the terminal receives the downlink synchronous signals sent by the base station, demodulates the downlink synchronous signals transmitted by the original resources and/or the downlink synchronous signals transmitted by the mirror image resources, determines target transmission resources, and the base station executes a random access process with the terminal through the target transmission resources. In the method and the device, the base station allocates and reserves the mirror image resources for the original resources according to the initialized system parameter information, and sends the downlink synchronous signals to the terminal through the original resources and the mirror image resources synchronously, so that diversity gain of the base station and the terminal on two sides is realized, the decoding success rate of the terminal in a random access network is enhanced, and the robustness of the terminal in the random access process in an interference environment is obviously improved.

Description

Random access method, device, computer equipment and storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to a random access method, apparatus, computer device, and storage medium.
Background
In recent years, with the development of mobile internet and internet of things, the development and revolution of wireless communication technology are driven. The 3GPP standards organization has completed the 3GPP NR Release15 standard formulation by 2018. The civil advanced technology can be introduced into the field of private network communication in accordance with the major trend of military and civil integration.
In the civil 5G NR standard, in the process of initial random access of a terminal to a network, firstly, a downlink synchronous signal sent by a base station is received, the downlink synchronous signal is demodulated, then a random access request is sent to the base station, a random access request response returned by the base station is received, a connection establishment request response returned by the base station is received by sending the connection establishment request again, and the process of random access to the network is realized. The entire random access network procedure is transmitted in the initial portion of bandwidth. Therefore, during the initial access of the terminal to the network, the configuration of the initial part of the bandwidth affects the network access performance of the terminal.
However, in the field of private network communication, a terminal has the capability of receiving a signal of the whole bandwidth, and the whole bandwidth is very easily interfered by a narrow band, a wide band or other malicious signals, so that the terminal fails to randomly access a network.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a random access method, apparatus, computer device and storage medium for solving the above technical problems.
In a first aspect, a random access method is provided, where the method includes:
determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
reserving mirror resources for original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
respectively sending downlink synchronous signals to the terminal through original resources and mirror resources; the downlink synchronous signal is used for the terminal to demodulate and obtain a target transmission resource;
and executing a random access process with the terminal through the target transmission resource.
In one embodiment, the reserving mirror resources for the original resources includes:
reserving mirror image resources for the original resources by taking the central frequency point of the current carrier of the original resources as a symmetry axis;
if the original resource is positioned on the low-frequency side of the symmetry axis, the mirror image resource is positioned on the high-frequency side of the symmetry axis; or, if the original resource is located on the high-frequency side of the symmetry axis, the mirror resource is located on the low-frequency side of the symmetry axis.
In one embodiment, after reserving the mirror resources for the original resources, the method further includes:
and if the position of the mirror image resource is not in the defined position range of the global synchronization channel number GSCN, adjusting the frequency domain position of the mirror image resource according to a preset rule.
In one embodiment, the adjusting the frequency domain position of the mirror resource according to the preset rule includes:
determining a GSCN position closest to a carrier central axis according to a preset mirror image resource offset in a direction close to the carrier central axis to fill a mirror image resource; the central axis of the carrier is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
In one embodiment, the adjusting the frequency domain position of the mirror resource according to the preset rule includes:
determining a GSCN position closest to a carrier central axis according to a preset mirror image resource offset in a direction away from the carrier central axis to fill a mirror image resource; the central axis of the carrier is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
In one embodiment, the target transmission resource is an initial configuration resource demodulated by the terminal according to a downlink synchronization signal transmitted by an original resource; or, the target transmission resource is a mirror image configuration resource demodulated by the terminal according to the downlink synchronization signal transmitted by the mirror image resource.
In a second aspect, a random access method is provided, and the method includes:
receiving a downlink synchronous signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
demodulating a downlink synchronous signal transmitted by an original resource and/or a downlink synchronous signal transmitted by a mirror resource, and determining a target transmission resource;
and executing a random access process with the base station through the target transmission resource.
In one embodiment, the demodulating the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror resource and determining the target transmission resource includes:
demodulating a downlink synchronous signal transmitted by an original resource;
if the original resource is successfully demodulated, determining the initial configuration resource obtained by demodulating the downlink synchronous signal transmitted by the original resource as the target transmission resource;
if the original resource is failed to demodulate, demodulating the downlink synchronous signal transmitted by the mirror image resource, and determining the mirror image configuration resource obtained by demodulating the downlink synchronous signal transmitted by the mirror image resource as the target transmission resource.
In one embodiment, after demodulating the downlink synchronization signal transmitted by the mirror image resource, the method further includes:
if the mirror image resource is failed to demodulate, searching the synchronous signal grid, returning to the step of demodulating the downlink synchronous signal transmitted by the original resource and/or the downlink synchronous signal transmitted by the mirror image resource and determining the target transmission resource.
In a third aspect, a random access apparatus is provided, the apparatus comprising:
the determining module is used for determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
the mirror resource reservation module is used for reserving mirror resources for the original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
the sending module is used for sending downlink synchronous signals to the terminal through the original resources and the mirror resources respectively; the downlink synchronous signal is used for the terminal to demodulate and obtain a target transmission resource;
and the transmission module is used for executing the random access process with the terminal through the target transmission resource.
In a fourth aspect, a random access apparatus is provided, the apparatus comprising:
the receiving module is used for receiving a downlink synchronous signal sent by the base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
the demodulation module is used for demodulating a downlink synchronous signal transmitted by an original resource and/or a downlink synchronous signal transmitted by a mirror resource and determining a target transmission resource;
and the transmission module is used for executing a random access process with the base station through the target transmission resource.
In a fifth aspect, a computer device is provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the random access method provided in any one of the embodiments of the first aspect when executing the computer program.
A sixth aspect provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the random access method provided in any of the embodiments of the first aspect.
According to the random access method, the random access device, the computer equipment and the storage medium, the base station reserves mirror resources for the original resources by determining the original resources corresponding to the parameter information after initializing the system, respectively sends downlink synchronous signals to the terminal through the original resources and the mirror resources, the terminal receives the downlink synchronous signals sent by the base station, demodulates the downlink synchronous signals transmitted by the original resources and/or the downlink synchronous signals transmitted by the mirror resources, determines target transmission resources, and the base station executes a random access process with the terminal through the target transmission resources. In the method and the device, the base station allocates and reserves the mirror image resources for the original resources according to the initialized system parameter information, and sends the downlink synchronous signals to the terminal through the original resources and the mirror image resources synchronously, so that diversity gain of the base station and the terminal on two sides is realized, the decoding success rate of the terminal in a random access network is enhanced, and the robustness of the terminal in the random access process in an interference environment is obviously improved.
Drawings
FIG. 1 is a diagram of an exemplary random access method;
fig. 2 is a message transmission diagram of a random access method according to an embodiment;
fig. 3 is a flow chart illustrating a random access method according to an embodiment;
FIG. 4 is a diagram illustrating mirror resource allocation in the random access method according to an embodiment;
FIG. 5 is a diagram illustrating mirror resource adjustment in a random access method according to an embodiment;
FIG. 6 is a diagram illustrating mirror resource adjustment in a random access method according to another embodiment;
fig. 7 is a flow chart illustrating a random access method in another embodiment;
fig. 8 is a flow chart illustrating a random access method in another embodiment;
fig. 9 is a flowchart illustrating the overall steps of a random access method according to another embodiment;
fig. 10 is a block diagram of a random access device in one embodiment;
fig. 11 is a block diagram showing the structure of a random access apparatus according to another embodiment;
fig. 12 is a block diagram showing the structure of a random access apparatus in another embodiment;
fig. 13 is a block diagram showing the structure of a random access apparatus according to another embodiment;
fig. 14 is a block diagram showing the structure of a random access apparatus in another embodiment;
FIG. 15 is a diagram showing an internal structure of a computer device in one embodiment;
fig. 16 is an internal structural view of a computer device in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The random access method provided by the present application can be applied to the application environment shown in fig. 1. Wherein terminal 102 communicates with base station 101 through a wireless network. The base station 101 reserves mirror image resources for the original resources by determining the original resources corresponding to the parameter information after initializing the system, respectively sends downlink synchronization signals to the terminal 102 through the original resources and the mirror image resources, the terminal 102 receives the downlink synchronization signals sent by the base station 101, demodulates the downlink synchronization signals transmitted by the original resources and/or the downlink synchronization signals transmitted by the mirror image resources, determines target transmission resources, and the base station 101 executes a random access process with the terminal 102 through the target transmission resources. The terminal 102 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the base station 101 may be implemented by an independent server or a server cluster formed by a plurality of servers.
Specifically, in the 5G NR System, a Synchronization Signal Block (SSB) and Remaining Minimum System Information (RMSI) have a certain correspondence on time-frequency resources, and a multiplexing relationship thereof is defined in the 3GPP R15 TS38.213 protocol. In the terminal random access process, the Downlink Control signaling comprises Control signaling (Type0-Physical Downlink Control Channel, Type0-PDCCH) for RMSI demodulation, Message 2(Message2, Msg 2)/Message 4(Message4, Msg4) (Type1-Physical Downlink Control Channel, Type1-PDCCH), and the time-frequency resources of Type0-PDCCH and Type1-PDCCH are all within the Initial Downlink Bandwidth (Initial Downlink Bandwidth Part, Initial Downlink bwp). For Uplink data in the Random Access process, the Uplink data mainly includes a Random Access Channel (RACH) and a Message 3(Message3, Msg3), and transmission of the Random Access Channel and the Message is also located in an Uplink Initial partial Bandwidth (Initial Uplink Bandwidth Part, Initial Uplink bwp). The terminal side random access procedure definition in NR is shown in table 1.
TABLE 1
Figure BDA0002209478830000061
The random access procedure and the message transmission diagram are shown in fig. 2. As can be seen from fig. 2, in the downstream aspect, the resource affecting the random access of the terminal is SSB/CORESET0 (i.e., initialdown bwp); in the uplink aspect, the resource affecting the random access of the terminal is initialplinkbwp. For a Time Division Duplex (TDD) system, IDs of uplink partial bandwidths corresponding to IDs defining downlink partial bandwidths in the 5G NR are consistent, and center frequency points are consistent. For example, the IDs of the downlink initial portion bandwidth and the uplink initial portion bandwidth may be set to be 0. In the private network domain, when there is strong narrowband interference, especially interference to the initial part of the bandwidth, the terminal side may not be able to complete the random access procedure successfully. Under the scene, the random access method, the random access device, the computer equipment and the storage medium are provided, and important resources in the random access process are subjected to diversity transmission on a frequency domain by sacrificing part of common resources, so that the success rate of the random access of the terminal is improved.
In one embodiment, as shown in fig. 3, a random access method is provided, which is described by taking the application of the method to the base station 101 in fig. 1 as an example, and includes the following steps:
s301, determining original resources corresponding to the parameter information after the system is initialized; the parameter information includes uplink air interface configuration information and downlink air interface configuration information.
The parameter information refers to system parameters set for the cell, and includes uplink air interface configuration parameters and downlink air interface configuration parameters; for example, the parameter Information may specifically include SSB, MIB, RMSI, System Information Block 1 (SIB 1), Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and corresponding Physical Downlink Shared CHannel (PDSCH), initial Downlink bwp, initial uplink bwp, CORSET0, PDCCH, and the like.
In this embodiment, for example, in the process of randomly accessing the network by the terminal, the downlink control signaling includes: the downlink synchronization signaling for demodulation of the SSB, the control signaling Type0-PDCCH for demodulation of the RMSI, the request response Msg2 of the random access channel and the control signaling Type1-PDCCH of the radio resource control connection response Msg 4. Wherein, the time-frequency resources of the Type0-PDCCH and the Type1-PDCCH are both within InitialDownlinkBWP. For uplink data in the random access process, the uplink data mainly comprises a random access channel request Msg1 and a radio resource control connection request Msg3 which are sent by a terminal side, and the transmission of the random access channel request Msg1 and the radio resource control connection request Msg3 is located in InitialUPlinkBWP. After the initial configuration of the parameters is completed, all system parameters, parameter positions, and uplink/downlink bandwidths and channels corresponding to the system parameters are determined as the original resources in this embodiment, and it should be noted that, when initializing the system parameters, the frequency domain positions of the original resources are located at both ends of the carrier bandwidth as much as possible. This is not a limitation in this embodiment.
S302, reserving mirror image resources for original resources; the time domain positions of the original resources and the mirror image resources are the same, the frequency domain positions are different, and the frequency domain positions of the original resources and the mirror image resources are not overlapped.
The mirror image resource refers to a resource which has the same time domain position except the frequency domain position as the original resource and carries the same content; the method for setting the position of the mirror image resource comprises the steps of mirroring an original low-frequency resource to a high-frequency resource by using a current carrier bandwidth central frequency point as a symmetry axis; or the original high-frequency resource is mirrored to the low-frequency resource by taking the current carrier bandwidth central frequency point as a symmetry axis; or, a position with the same time domain and different frequency domains can be obtained by calculating a rule, so as to set the position of the mirror image resource.
In the present embodiment, illustratively, as shown in fig. 4, the original resources are located in the low frequency part of the time-frequency resources, taking the carrier center as a symmetry axis, mirroring the time-frequency resources of the low-frequency part to the high-frequency part, realizing the mirror resource allocation from the original low-frequency resources to the high-frequency resources, reserving mirror time-frequency resources of SSB, CORSET0, SIB1 and the like, further, in the reserved mirror time-frequency resources, other resources are used in a staggered way, reserved resources are not allowed to be occupied, and when system parameters are initialized, the frequency domain positions of the original resources are located at the two ends of the carrier bandwidth as much as possible, so that the frequency domain positions of the original resource and the mirror image resource are not overlapped, if the phenomenon of overlapping the frequency domain positions occurs, then the corresponding mirror resources cannot be configured, and optionally, in order to reduce the occupancy rate of the mirror resources in the frequency domain as much as possible, the multiplexing mode of SSB and CORSET0 is a pattern1 in this embodiment. This is not a limitation in this embodiment.
S303, respectively sending downlink synchronous signals to the terminal through the original resources and the mirror image resources; the downlink synchronous signal is used for the terminal to demodulate and obtain the target transmission resource.
The downlink synchronization signal refers to downlink synchronization signaling carrying an SSB, an MIB and an SIB1 and a CORSET0 carrying RMSI, where the downlink synchronization signaling is used to enable the terminal and the base station to use the same time-frequency position, and the RMSI in Coreset0 carries initialdown downlink bwp and initialpuplinkbwp. The target transmission resource refers to a transmission resource determined by the terminal successfully demodulating the MIB, the SIB1, and the like in the original resource or the mirror resource.
In this embodiment, the base station sends downlink synchronization signaling carrying the SSB, the MIB and the SIB1 and the CORSET0 carrying the RMSI to the terminal through the original resource and the mirror resource, respectively, for example, the terminal first selects to demodulate the MIB and the SIB1 in the original resource, and if the demodulation is successful in the original resource, determines that the original resource is the target transmission resource; if demodulation fails in the original resource, selecting to demodulate the MIB and the SIB1 in the mirror image resource, if demodulation succeeds in the mirror image resource, determining the mirror image resource as a target transmission resource, and then executing a process of randomly accessing the network on the InitialUPlinkBWP corresponding to the target transmission resource by the terminal according to the determined target transmission resource. This is not a limitation in this embodiment.
And S304, executing a random access process with the terminal through the target transmission resource.
The target transmission resource refers to a transmission resource determined by successfully demodulating the MIB, the SIB1, and the like in an original resource or a mirror resource by the terminal, and is the original resource or the mirror resource. The random access process refers to a series of radio resource control connection establishment processes, such as an Msg1 carrying RACH and an Msg3 carrying RRC, which are initiated to the base station after the terminal demodulates MIB and SIB1 on target transmission resources, and an Msg2 carrying RAR and an RRC response Msg4 which are returned to the terminal by the base station.
In the random access method provided in this embodiment, after the terminal successfully demodulates the MIB and the SIB1 in the original resource or the mirror resource to determine the target transmission resource, the base station receives a random access channel request Msg1 sent by the terminal on the target transmission resource, the Msg1 carries a random access preamble, the base station returns a random access response Msg2 to the terminal according to the Msg1, the Msg2 carries a Time Advance (TA), an uplink grant response, and a RAR, the base station receives a connection establishment request Msg3 returned by the terminal according to the RAR, and finally the base station returns a connection establishment request Msg4 according to the Msg3 sent by the terminal, thereby finally completing the random access process. This is not a limitation in this embodiment.
In this embodiment, the base station reserves the mirror image resource for the original resource by determining the original resource corresponding to the parameter information after initializing the system, then sends the downlink synchronization signal to the terminal through the original resource and the mirror image resource, and then determines the target transmission resource according to the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror image resource demodulated by the terminal, and finally completes the random access process executed by the target transmission resource and the terminal. The base station allocates and reserves the mirror image resource for the original resource according to the initialized system parameter information, and sends the downlink synchronous signal to the terminal through the original resource and the mirror image resource synchronously, so that the diversity gain of the base station and the terminal at two sides is realized, the decoding success rate of the terminal in a random access network is enhanced, and the robustness of the terminal in the random access process in an interference environment is obviously improved.
In one embodiment, the step 302 "reserving mirror resources for original resources" in the above embodiment includes: reserving mirror image resources for the original resources by taking the central frequency point of the current carrier of the original resources as a symmetry axis; if the original resource is positioned on the low-frequency side of the symmetry axis, the mirror image resource is positioned on the high-frequency side of the symmetry axis; or, if the original resource is located on the high-frequency side of the symmetry axis, the mirror resource is located on the low-frequency side of the symmetry axis.
In this embodiment, when setting a mirror image resource corresponding to a reserved original resource, setting a time domain position of the mirror image resource to be consistent with a time domain position of the original resource in order to enable the original resource and the mirror image resource to simultaneously transmit a downlink synchronization signal to a terminal, and setting a frequency domain position of the mirror image resource to be a symmetrical axis with a central frequency point of a carrier bandwidth of the original resource as a symmetrical axis in order to enable the resource with less sacrifice, so that if the frequency domain position of the original resource is relatively low frequency in the carrier bandwidth, the frequency domain position of the mirror image resource is relatively high frequency through symmetrical setting; if the frequency domain position of the original resource is relatively high frequency in the carrier bandwidth, the frequency domain position of the mirror resource is relatively low frequency through symmetrical setting, which is not limited in this embodiment.
In the embodiment, the position of the mirror image resource is set by taking the central frequency point of the carrier bandwidth as a symmetry axis, on one hand, the mirror image resource and the original resource are in the same time domain, and the downlink synchronization signal can be synchronously sent to the terminal; on the other hand, the mirror image resource and the frequency domain position of the original resource are in a symmetrical relation, so that the purpose of sacrificing the minimum resource to the minimum extent, and enhancing the robustness of the terminal access network is achieved.
In one embodiment, after step 302 "reserve mirror resources for original resources" in the above embodiment, the method further includes:
if the position of the mirror image resource is not in the defined position range of Global Synchronization Channel Number (GSCN), the frequency domain position of the mirror image resource is adjusted according to the preset rule.
The global synchronization channel numbers GSCN are used for marking the channel numbers of the SSBs, each GSCN corresponds to the frequency domain position of one SSB, and the GSCNs are numbered according to the increasing order of the frequency domains. In the 5G NR system, the frequency domain position of the synchronization signal block must be filled strictly according to the definition of GSCN. Since the base station sends the downlink synchronization signaling carrying the SSB from the mirror resource, when performing mirror resource configuration, it is equivalent to configuring the mirror resource location of the SSB at the same time, so the mirror resource location must be filled according to the GSCN definition.
In this embodiment, when performing mirror resource allocation, if the location of the mirror resource is not within the defined location range of the global synchronization channel number GSCN, in this case, the location of the mirror resource needs to be fine-tuned. The mode of finely adjusting the mirror image position comprises adjusting the mirror image resource to a GSCN position closest to the symmetry axis in the direction close to the center frequency point of the carrier bandwidth as the symmetry axis, or adjusting the mirror image resource to a GSCN position closest to the symmetry axis in the direction far from the center frequency point of the carrier bandwidth as the symmetry axis, or adjusting the mirror image resource to a GSCN position by taking the multiple of the subcarrier interval as an adjusting unit. This is not a limitation in this embodiment.
Optionally, in an embodiment, the "adjusting the frequency domain position of the mirror resource according to a preset rule" includes:
determining a GSCN position closest to a carrier central axis according to a preset mirror image resource offset in a direction close to the carrier central axis to fill a mirror image resource; the central axis of the carrier is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
The preset mirror resource offset refers to a subcarrier interval defined in a 5G NR system, and the subcarrier interval is usually 60KHz and can be used in Sub 6GHz and millimeter waves at the same time. The carrier central axis refers to an axis where a central frequency point of a carrier bandwidth where an original resource is located, and is also a symmetric axis of the central frequency point of the carrier bandwidth used when a mirror image resource is set.
In this embodiment, for example, as shown in fig. 5, if the location of the mirror resource is not within the defined location range of the global synchronization channel number GSCN, the nearest GSCN location is found in the direction close to the central axis, and the mirror resource is filled.
Specifically, when the mirror image is at the high-frequency position, the calculation method for adjusting the mirror image resource is as follows:
SSBmirror_start_index_adjust＝SSBmirror_start_index-SSBmirror_offset (1)
SSBmirror_start_index＝SSBstart_index+2*(CarrierCenter-SSBstart_index) (2)
SSBmirror_offset<GSCN_gap (3)
wherein, SSBmirrior_start_index_adjustIndicating the location of the mirrored resource after adjustment in the GSCN location Range, SSBmirrior_start_indexIndicating the location of a mirrored resource that was not in the GSCN location range prior to the adjustment, SSBmirrior_offsetThe maximum value of the subcarrier spacing representing the SSB does not exceed the spacing width of two GSCNs. GSCN _ gap denotes the frequency domain separation of two GSCNs, SSBstart_indexRepresenting the time-frequency location of the original resource.
Optionally, in an embodiment, the "adjusting the frequency domain position of the mirror resource according to the preset rule" according to another specific embodiment includes:
determining a GSCN position closest to a carrier central axis according to a preset mirror image resource offset in a direction away from the carrier central axis to fill a mirror image resource; the carrier central axis is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
In this embodiment, for example, as shown in fig. 6, if the location of the mirror resource is not within the defined location range of the global synchronization channel number GSCN, the nearest GSCN location is found in the direction away from the central axis, and the mirror resource is filled.
Specifically, when the mirror image is at the high-frequency position, the calculation method for adjusting the mirror image resource is as follows:
SSBmirror_start_index_adjust＝SSBmirror_start_index+SSBmirror_offset (1)
SSBmirror_start_index＝SSBstart_index+2*(CarrierCenter-SSBstart_index) (2)
SSBmirror_offset<GSCN_gap (3)
it should be noted that in the adjustment manner provided in this embodiment, the positions of all the mirror resources cannot exceed the frequency domain range of the carrier bandwidth.
In this embodiment, the frequency domain position of the mirror resource is adjusted, so that the SSB mirror resource meets the requirement of filling strictly according to the definition of the GSCN in the 5G NR system. The adjusted mirror resource location is within a defined location range of the global synchronization channel number GSCN.
In an embodiment, in the step 304, "execute a random access procedure with the terminal through the target transmission resource" in the foregoing embodiment, the target transmission resource is an initial configuration resource demodulated by the terminal according to a downlink synchronization signal transmitted by an original resource; or, the target transmission resource is a mirror image configuration resource demodulated by the terminal according to the downlink synchronization signal transmitted by the mirror image resource.
In this embodiment, for example, the terminal receives the MIB and the SIB1 carried in the downlink synchronization signal sent by the base station, demodulates the MIB and the SIB1 on the original resource, and determines that the target transmission resource is the original resource if the demodulation on the original resource is successful; if demodulation fails on the original resource, the MIB and the SIB1 are selected to be demodulated on the mirror image resource, and if demodulation succeeds on the mirror image resource, the target transmission resource is determined to be the mirror image resource. This is not a limitation in this embodiment.
In this embodiment, the base station sends downlink synchronization signals to the terminal through the original resource and the mirror resource, so that the terminal demodulates the MIB and the SIB1 carried in the downlink synchronization signals in the original resource/mirror resource to obtain a final target transmission resource, and transmits the final target transmission resource in two resource manners, thereby increasing the success rate of accessing the terminal to the network.
In one embodiment, as shown in fig. 7, a random access method is provided, which is described by taking the method as an example applied to the terminal 102 in fig. 1, and includes the following steps:
s701, receiving a downlink synchronization signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resources and the mirror image resources are the same, the frequency domain positions are different, and the frequency domain positions of the original resources and the mirror image resources are not overlapped.
The downlink synchronization signal refers to downlink synchronization signaling carrying an SSB, an MIB and an SIB1 and a CORSET0 carrying RMSI, where the downlink synchronization signaling is used to enable the terminal and the base station to use the same time-frequency position, and the RMSI in the CORSET0 carries initialdown downlink bwp and initialpuplinkbwp.
In this embodiment, the terminal receiving base station sends, to the terminal through the original resource and the mirror resource, the downlink synchronization signal carrying the SSB, the MIB, and the SIB1 and the CORSET0 carrying the RMSI at the same time, where the downlink synchronization signal is in the same time frequency as the base station and is used for communication transmission. The mirror image resource refers to a resource which has the same time domain position and the same carried content as the original resource except that the frequency domain position is different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped, and if the frequency domain positions are overlapped, the corresponding mirror image resource cannot be configured, which is not limited in this embodiment.
S702, demodulating the downlink synchronous signal transmitted by the original resource and/or the downlink synchronous signal transmitted by the mirror resource, and determining the target transmission resource.
The target transmission resource refers to a transmission resource determined by the terminal successfully demodulating the MIB, the SIB1, and the like in the original resource or the mirror resource.
In this embodiment, the terminal receiving base station simultaneously sends downlink synchronization signaling carrying the SSB, the MIB and the SIB1 and a control signal resource set CORSET0 carrying the RMSI to the terminal through the original resource and the mirror resource, respectively, and demodulates the SSB, the MIB and the SIB1 in the original resource and/or the mirror resource. Exemplarily, if the demodulation is successful in the original resource, the original resource is determined to be the target transmission resource; if demodulation fails in the original resources, the MIB and the SIB1 are selected to be demodulated in the mirror image resources, and if demodulation succeeds in the mirror image resources, the mirror image resources are determined to be target transmission resources. This is not a limitation in this embodiment.
And S703, executing a random access process with the base station through the target transmission resource.
In this embodiment, after the terminal demodulates the target transmission resource successfully determined by MIB and SIB1 in the original resource or the mirror resource, the terminal sends a random access channel request Msg1 to the base station on the target transmission resource, where the Msg1 carries a random access preamble, receives a random access channel request Msg2 returned by the base station according to Msg1, where the Msg2 carries a TA, an uplink grant response, and a RAR, then after the terminal demodulates the RAR, sends a connection establishment request Msg3 to the base station, and finally receives an Msg4 carrying an RRC returned by the base station, and completes activation of the first initial bandwidth, thereby implementing the random access process. This is not a limitation in this embodiment.
In the random access method provided in this embodiment, a terminal demodulates a downlink synchronization signal transmitted by an original resource and/or a downlink synchronization signal transmitted by a mirror resource by receiving a downlink synchronization signal transmitted by a base station by using the original resource and the mirror resource, determines a target transmission resource, and executes a random access process with the base station by using the target transmission resource. The terminal receives the downlink synchronous signal synchronously sent by the base station through the original resource and the mirror image resource, and demodulates the downlink synchronous signal in the original resource or the mirror image resource, so that diversity gain of the base station and the terminal at two sides is realized, the decoding success rate of the terminal in a random access network is enhanced, and the robustness of the terminal in the random access process in an interference environment is obviously improved.
In an embodiment, as shown in fig. 8, step 702 "demodulate the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror resource, and determine the target transmission resource" in the foregoing embodiment includes:
s801, demodulating a downlink synchronous signal transmitted by an original resource; if the original resource is successfully demodulated, go to step 802; if the original resource demodulation fails, go to step 803.
The terminal demodulates the downlink synchronization signal on the original resource after receiving the downlink synchronization signal sent by the base station through the original resource and the mirror image resource, and executes step 802 if the demodulation is successful; if the original resource demodulation fails, go to step 803.
In this embodiment, after receiving a downlink synchronization signal sent by a base station through an original resource and a mirror resource, a terminal first selects to demodulate an SSB, an MIB, and an SIB1 carried in the downlink synchronization signal in the original resource, and executes a corresponding operation according to a demodulation result of the terminal in the original resource, which is not limited in this embodiment.
S802, determining the initial configuration resource obtained by demodulating the downlink synchronous signal transmitted by the original resource as the target transmission resource.
In this embodiment, the terminal demodulates the SSB, MIB, and SIB1 carried in the downlink synchronization signal in the original resource, and the demodulation result is used to make the terminal and the base station in the same time frequency, and if the demodulation is successful in the original resource, the original resource is used as the target transmission resource to perform the random access network procedure. The present embodiment is not limited thereto.
S803, demodulating the downlink synchronous signal transmitted by the mirror image resource, and determining the mirror image configuration resource obtained by demodulating the downlink synchronous signal transmitted by the mirror image resource as the target transmission resource.
In this embodiment, if demodulation of the original resource fails, the terminal selects to demodulate, in the mirror image resource, the SSB, the MIB, and the SIB1 carried in the downlink synchronization signal, and the demodulation result is used to enable the terminal and the base station to be in the same time frequency, and if demodulation in the mirror image resource succeeds, the mirror image resource is used as a target transmission resource to perform a random access network procedure. The present embodiment is not limited thereto.
In this embodiment, the terminal demodulates the downlink synchronization signal sent by the base station on the original resource and the mirror resource, and determines the process of randomly accessing the target transmission resource to the network according to the demodulation result.
In an embodiment, after step 803 "demodulate the downlink synchronization signal transmitted by the mirror resource" in the above embodiment, the method further includes:
if the mirror image resource is not demodulated, the synchronization signal grid is searched, and the step 702 of demodulating the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror image resource and determining the target transmission resource in the above embodiment is executed.
The synchronization signal grid refers to the time domain position which is the same as the current resource, and the transmission resource is searched at the same time domain position, namely the original resource is returned for demodulation again.
In this embodiment, after failing to demodulate the SSB, MIB, and SIB1 carried in the downlink synchronization signal in the mirror image resource, the terminal finds the transmission resource in the same domain again, that is, returns to the original resource corresponding to the current mirror image resource, and demodulates the downlink synchronization signal again until the downlink synchronization signal is successfully demodulated. This is not a limitation in this embodiment.
In the embodiment, after the terminal fails to demodulate the downlink synchronization signal sent by the base station on the mirror image resource, the terminal searches the corresponding original resource again to demodulate, and because the terminal can continuously demodulate the downlink synchronization signal through the original resource and the mirror image resource, the robustness of the terminal in network access is enhanced.
For better random access method provided by the present application, the present embodiment will be explained from the whole step flow of the random access method. As shown in fig. 9, includes:
s901, the base station determines original resources corresponding to the parameter information after the system is initialized;
s902, reserving mirror image resources for original resources by the base station;
s903, the base station sends downlink synchronization signals to the terminal through the original resources and the mirror resources at the same time;
s904, the terminal demodulates the downlink synchronous signal transmitted by the original resource; if the demodulation in the original resource is successful, executing S705; if the demodulation fails in the original resource, executing S906;
s905, selecting original resource transmission as downlink decoding (Msg2/Msg4) and uplink transmission (Msg1/Msg3) in the subsequent random access process at the terminal side;
s906, the terminal demodulates the downlink synchronous signal transmitted by the mirror image resource; if the demodulation is successful in the mirror image resource, executing S707; if the demodulation fails in the mirror image resource, returning to execute S903;
s907, the terminal side selects mirror resource transmission as downlink decoding (Msg2/Msg4) and uplink transmission (Msg1/Msg3) in the subsequent random access process.
In this embodiment, the base station side reserves the original resource and symmetrically extracts the mirror image resource with the carrier bandwidth center frequency point as the mirror image resource, and simultaneously sends the downlink synchronization signal as the terminal side through the original resource and the mirror image resource, so that the diversity gain of the base station side and the terminal side in the random access network is realized, and the decoding success rate of the random access network of the terminal side is enhanced.
In the random access method in the aspect of communication interaction between a base station and a terminal in the random access process provided in this embodiment, the implementation principle and technical effect are similar to those of the random access method provided in any of the above embodiments, and details are not repeated here.
It should be understood that although the various steps in the flow charts of fig. 1-9 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-9 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 10, there is provided a random access apparatus 500, including: an initialization module 501, a configuration module 502, a sending module 503, and a transmission module 504, wherein:
an initialization module 501, configured to determine an original resource corresponding to parameter information after system initialization; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
a configuration module 502, configured to reserve mirror resources for original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
a sending module 503, configured to send downlink synchronization signals to the terminal through the original resource and the mirror resource respectively; the downlink synchronous signal is used for the terminal to demodulate and obtain a target transmission resource;
a transmission module 504, configured to perform a random access procedure with the terminal through the target transmission resource.
In an embodiment, the configuration module 502 is configured to reserve mirror resources for the original resources by using a center frequency point of a current carrier of the original resources as a symmetry axis;
if the original resource is positioned on the low-frequency side of the symmetry axis, the mirror image resource is positioned on the high-frequency side of the symmetry axis; or, if the original resource is located on the high-frequency side of the symmetry axis, the mirror resource is located on the low-frequency side of the symmetry axis.
In one embodiment, as shown in fig. 11, the configuration module 502 includes an adjusting unit 5021:
an adjusting unit 5021, configured to adjust a frequency domain position of the mirror resource according to a preset rule if the position of the mirror resource is not within the defined position range of the global synchronization channel number GSCN.
Optionally, in an embodiment, the adjusting unit 5021 is further configured to determine, according to a preset mirror resource offset, a GSCN position closest to a carrier central axis to fill a mirror resource in a direction close to the carrier central axis; the central axis of the carrier is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
Optionally, in an embodiment, the adjusting unit 5021 is further configured to determine, according to a preset mirror resource offset, a GSCN position closest to a carrier central axis to fill a mirror resource in a direction away from the carrier central axis; the central axis of the carrier is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
In one embodiment, the target transmission resource is an initial configuration resource demodulated by the terminal according to a downlink synchronization signal transmitted by an original resource; or, the target transmission resource is a mirror image configuration resource demodulated by the terminal according to the downlink synchronization signal transmitted by the mirror image resource.
In one embodiment, as shown in fig. 12, there is provided a random access apparatus 600, including: a receiving module 601, a demodulation module 602, and a transmission module 603, wherein:
a receiving module 601, configured to receive a downlink synchronization signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
a demodulation module 602, configured to demodulate a downlink synchronization signal transmitted by an original resource and/or a downlink synchronization signal transmitted by a mirror resource, and determine a target transmission resource;
a transmission module 603 configured to perform a random access procedure with the base station through the target transmission resource.
In one embodiment, as shown in fig. 13, the demodulation module 602 includes a determination unit 6021:
a determining unit 6021, configured to demodulate a downlink synchronization signal transmitted by an original resource; if the original resource is successfully demodulated, determining the initial configuration resource obtained by demodulating the downlink synchronous signal transmitted by the original resource as the target transmission resource; if the original resource is failed to demodulate, demodulating the downlink synchronous signal transmitted by the mirror image resource, and determining the mirror image configuration resource obtained by demodulating the downlink synchronous signal transmitted by the mirror image resource as the target transmission resource.
In one embodiment, as shown in fig. 14, on the basis of fig. 13, the demodulation module 602 further includes a search unit 6022:
a searching unit 6022, configured to search the synchronization signal grid if the mirror image resource demodulation fails, return to the step of demodulating the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror image resource, and determine the target transmission resource.
The implementation principle and technical effect of the random access apparatus provided in the foregoing embodiments are similar to those of the foregoing method embodiments, and are not described herein again.
For specific limitations of the random access device, reference may be made to the above limitations of the random access method, which is not described herein again. The modules in the random access apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a base station or a server, and its internal structure diagram may be as shown in fig. 15. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing random access data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a random access method. \ A
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 16. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a random access method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the configurations shown in fig. 15 and 16 are block diagrams of only some of the configurations relevant to the present application, and do not constitute a limitation on the computing devices to which the present application may be applied, and a particular computing device may include more or less components than those shown, or some of the components may be combined, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
reserving mirror resources for original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
respectively sending downlink synchronous signals to the terminal through original resources and mirror resources; the downlink synchronous signal is used for the terminal to demodulate and obtain a target transmission resource;
and executing a random access process with the terminal through the target transmission resource.
The implementation principle and technical effect of the computer device provided by the embodiment of the present application are similar to those of the method embodiment described above, and are not described herein again.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
receiving a downlink synchronous signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
demodulating a downlink synchronous signal transmitted by an original resource and/or a downlink synchronous signal transmitted by a mirror resource, and determining a target transmission resource;
and executing a random access process with the base station through the target transmission resource.
The implementation principle and technical effect of the computer device provided by the embodiment of the present application are similar to those of the method embodiment described above, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
reserving mirror resources for original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
respectively sending downlink synchronous signals to the terminal through original resources and mirror resources; the downlink synchronous signal is used for the terminal to demodulate and obtain a target transmission resource;
and executing a random access process with the terminal through the target transmission resource.
The implementation principle and technical effect of the computer-readable storage medium provided by this embodiment are similar to those of the above-described method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
receiving a downlink synchronous signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
demodulating a downlink synchronous signal transmitted by an original resource and/or a downlink synchronous signal transmitted by a mirror resource, and determining a target transmission resource;
and executing a random access process with the base station through the target transmission resource.
The implementation principle and technical effect of the computer-readable storage medium provided by this embodiment are similar to those of the above-described method embodiment, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (13)

1. A random access method, the method comprising:
determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
reserving mirror image resources for the original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
respectively sending downlink synchronous signals to the terminal through the original resources and the mirror image resources; the downlink synchronous signal is used for the terminal to demodulate to obtain a target transmission resource;
and executing a random access process with the terminal through the target transmission resource.
2. The method of claim 1, wherein reserving mirrored resources for the original resources comprises:
reserving mirror image resources for the original resources by taking the central frequency point of the current carrier of the original resources as a symmetry axis;
if the original resource is positioned on the low-frequency side of the symmetry axis, the mirror image resource is positioned on the high-frequency side of the symmetry axis; or, if the original resource is located on the high-frequency side of the symmetry axis, the mirror resource is located on the low-frequency side of the symmetry axis.
3. The method according to claim 1 or 2, wherein after reserving mirrored resources for the original resources, the method further comprises:
and if the position of the mirror image resource is not in the defined position range of the global synchronization channel number GSCN, adjusting the frequency domain position of the mirror image resource according to a preset rule.
4. The method of claim 3, wherein the adjusting the frequency domain position of the mirror resource according to a preset rule comprises:
determining a GSCN position closest to a carrier central axis according to a preset mirror resource offset in a direction close to the carrier central axis to fill the mirror resource; the carrier central axis is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
5. The method of claim 3, wherein the adjusting the frequency domain position of the mirror resource according to a preset rule comprises:
determining a GSCN position closest to a carrier central axis according to a preset mirror image resource offset in a direction away from the carrier central axis to fill the mirror image resource; the carrier central axis is symmetrically drawn by taking the central frequency point of the current carrier of the original resource as a reference.
6. The method according to claim 1 or 2, wherein the target transmission resource is an initial configuration resource demodulated by the terminal according to a downlink synchronization signal transmitted by the original resource; or, the target transmission resource is a mirror image configuration resource demodulated by the terminal according to the downlink synchronization signal transmitted by the mirror image resource.
7. A random access method, the method comprising:
receiving a downlink synchronous signal sent by a base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
demodulating the downlink synchronous signal transmitted by the original resource and/or the downlink synchronous signal transmitted by the mirror image resource, and determining a target transmission resource;
and executing a random access process with the base station through the target transmission resource.
8. The method according to claim 7, wherein the demodulating the downlink synchronization signal transmitted by the original resource and/or the downlink synchronization signal transmitted by the mirror resource and determining the target transmission resource comprises:
demodulating a downlink synchronous signal transmitted by the original resource;
if the original resource is successfully demodulated, determining an initial configuration resource obtained by demodulating a downlink synchronization signal transmitted by the original resource as the target transmission resource;
if the original resource is failed to demodulate, demodulating the downlink synchronous signal transmitted by the mirror image resource, and determining the mirror image configuration resource obtained by demodulating the downlink synchronous signal transmitted by the mirror image resource as the target transmission resource.
9. The method of claim 8, wherein after demodulating the downlink synchronization signal transmitted by the mirror resource, the method further comprises:
and if the mirror image resource is failed to demodulate, searching a synchronous signal grid, returning to the step of demodulating the downlink synchronous signal transmitted by the original resource and/or the downlink synchronous signal transmitted by the mirror image resource, and determining the target transmission resource.
10. A random access apparatus, the apparatus comprising:
the initialization module is used for determining original resources corresponding to the parameter information after the system is initialized; the parameter information comprises uplink air interface configuration information and downlink air interface configuration information;
the configuration module is used for reserving mirror resources for the original resources; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
the sending module is used for sending downlink synchronous signals to the terminal through the original resources and the mirror resources respectively; the downlink synchronous signal is used for the terminal to demodulate to obtain a target transmission resource;
and the transmission module is used for executing a random access process with the terminal through the target transmission resource.
11. A network access apparatus, the apparatus comprising:
the receiving module is used for receiving a downlink synchronous signal sent by the base station through an original resource and a mirror resource; the time domain positions of the original resource and the mirror image resource are the same, the frequency domain positions are different, and the frequency domain positions of the original resource and the mirror image resource are not overlapped;
the demodulation module is used for demodulating the downlink synchronous signal transmitted by the original resource and/or the downlink synchronous signal transmitted by the mirror resource and determining a target transmission resource;
a transmission module, configured to perform a random access procedure with the base station through the target transmission resource.
12. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 9 when executing the computer program.
13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 9.
CN201910893398.9A 2019-09-20 2019-09-20 Random access method, random access device, computer equipment and storage medium Active CN112543500B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910893398.9A CN112543500B (en) 2019-09-20 2019-09-20 Random access method, random access device, computer equipment and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910893398.9A CN112543500B (en) 2019-09-20 2019-09-20 Random access method, random access device, computer equipment and storage medium

Publications (2)

Publication Number Publication Date
CN112543500A true CN112543500A (en) 2021-03-23
CN112543500B CN112543500B (en) 2023-10-10

Family

ID=75012399

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910893398.9A Active CN112543500B (en) 2019-09-20 2019-09-20 Random access method, random access device, computer equipment and storage medium

Country Status (1)

Country Link
CN (1) CN112543500B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112788634A (en) * 2019-11-01 2021-05-11 广州海格通信集团股份有限公司 Communication system, method, apparatus, computer device, and storage medium
CN114828159A (en) * 2022-05-27 2022-07-29 北京云智软通信息技术有限公司 Method for configuring base station and using emergency access resource by user equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170353234A1 (en) * 2016-06-01 2017-12-07 Qualcomm Incorporated Conveying hypotheses through resource selection of synchronization and broadcast channels
CN107548146A (en) * 2016-06-23 2018-01-05 中兴通讯股份有限公司 Sending method, method of reseptance, dispensing device and the reception device of synchronizing signal
CN108112020A (en) * 2016-11-25 2018-06-01 维沃移动通信有限公司 A kind of transmission method, equipment and the system of synchronous access signal group
CN108496402A (en) * 2016-09-29 2018-09-04 华为技术有限公司 The method and device of initial access
US20190215219A1 (en) * 2016-10-10 2019-07-11 Huawei Technologies Co., Ltd. Synchronization Signal Sending Method And Receiving Method, And Apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170353234A1 (en) * 2016-06-01 2017-12-07 Qualcomm Incorporated Conveying hypotheses through resource selection of synchronization and broadcast channels
CN107548146A (en) * 2016-06-23 2018-01-05 中兴通讯股份有限公司 Sending method, method of reseptance, dispensing device and the reception device of synchronizing signal
CN108496402A (en) * 2016-09-29 2018-09-04 华为技术有限公司 The method and device of initial access
US20190215219A1 (en) * 2016-10-10 2019-07-11 Huawei Technologies Co., Ltd. Synchronization Signal Sending Method And Receiving Method, And Apparatus
CN108112020A (en) * 2016-11-25 2018-06-01 维沃移动通信有限公司 A kind of transmission method, equipment and the system of synchronous access signal group

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112788634A (en) * 2019-11-01 2021-05-11 广州海格通信集团股份有限公司 Communication system, method, apparatus, computer device, and storage medium
CN112788634B (en) * 2019-11-01 2023-06-02 广州海格通信集团股份有限公司 Communication system, method, apparatus, computer device, and storage medium
CN114828159A (en) * 2022-05-27 2022-07-29 北京云智软通信息技术有限公司 Method for configuring base station and using emergency access resource by user equipment
CN114828159B (en) * 2022-05-27 2024-06-07 北京云智软通信息技术有限公司 Base station configuration and method for using emergency access resource by user equipment

Also Published As

Publication number Publication date
CN112543500B (en) 2023-10-10

Similar Documents

Publication Publication Date Title
CN108282895B (en) Random access method and terminal
CN112787785B (en) Beam establishing method and device
CN113491165A (en) Message structure in two-step random access from user equipment to base station
CN111757503A (en) Resource determination method and device
EP3841819B1 (en) Transmission of a random access preamble by a ue based on configuration information received from a base station
EP3627929B1 (en) Resource allocation method, terminal device, and network device
EP4255089A2 (en) Communication apparatuses and communication methods for random access
CN113973395B (en) Random access method, configuration method and related equipment
EP3843492A1 (en) Random access method and communication device
US20240292464A1 (en) Method and device for transmitting random access signal, and computer readable medium
CN112543500B (en) Random access method, random access device, computer equipment and storage medium
CN115245035B (en) Random access method, device, terminal, network equipment and storage medium
CN111106863A (en) Method and apparatus for signal transmission
CN112584515B (en) Method and device for determining random access resource
CN109803384B (en) Method for determining resources, resource configuration method and equipment
RU2754304C2 (en) Method for access control and corresponding product
EP4156832A1 (en) Method and device for transmitting random access signal
CN110062473B (en) Random access method, terminal equipment and network equipment
CN110139379B (en) Information transmission method, equipment, communication system and storage medium in network convergence
CN108811167B (en) Apparatus and method for processing channel access procedure
CN114599112A (en) Random access method, device and system
CN110933703A (en) User detection method, device, equipment and storage medium
KR20230087485A (en) Methods and Apparatuses for Indicating a Set of Resources on an NR Sidelink
CN109150426B (en) DCI format information transmission method, related equipment and system
CN112788634B (en) Communication system, method, apparatus, computer device, 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