CN116112134A

CN116112134A - Random access method, device, terminal and network side equipment

Info

Publication number: CN116112134A
Application number: CN202111334667.1A
Authority: CN
Inventors: 杨坤; 吴凯
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2023-05-12
Also published as: WO2023083290A1

Abstract

The application discloses a random access method, a device, a terminal and network side equipment, which belong to the technical field of communication, and the random access method in the embodiment of the application comprises the following steps: the terminal equipment sends a plurality of Physical Random Access Channel (PRACH) signals, and a plurality of PRACH resources used by the PRACH signals respectively correspond to a plurality of different downlink reference signals; wherein a target PRACH resource of a plurality of PRACH resources used by the plurality of PRACH signals is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals; the quasi co-address signal is used for receiving a first downlink signal by the terminal equipment, wherein the first downlink signal is an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message.

Description

Random access method, device, terminal and network side equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a random access method, a device, a terminal and network side equipment.

Background

In order to enhance the coverage performance of the physical random access channel (Physical Random Access Channel, PRACH) signal, a technical scheme of multiple transmission of the PRACH signal may be introduced.

When the PRACH signals are transmitted multiple times, each PRACH signal may be associated with a different downlink reference signal or synchronization signal block (Synchronization Signal Block, SSB), that is, each PRACH signal is transmitted based on RO resources (time-frequency resources or preamble resources) corresponding to different SSBs, the terminal and the network side device need to determine downlink signal Msg2 or Msg3 retransmission scheduling information (i.e., TC-RNTI scrambled DCI 0-0) or Msg4 quasi co-located (QCL) signals, which may cause downlink signal transmission failure if the terminal and the network side device are inconsistent in understanding the co-located signal.

Disclosure of Invention

The embodiment of the application provides a random access method, a device, a terminal and network side equipment, which can solve the problem that downlink signal transmission fails due to inconsistent understanding of alignment co-location signals when PRACH signals are transmitted for multiple times.

In a first aspect, a random access method is provided, applied to a terminal, and the method includes:

the terminal equipment sends a plurality of Physical Random Access Channel (PRACH) signals, and a plurality of PRACH resources used by the PRACH signals respectively correspond to a plurality of different downlink reference signals;

wherein a target PRACH resource of a plurality of PRACH resources used by the plurality of PRACH signals is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals; the quasi co-address signal is used for receiving a first downlink signal by the terminal equipment, wherein the first downlink signal is an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message.

In a second aspect, a random access method is provided, applied to a network side device, and the method includes:

the method comprises the steps that network side equipment receives a plurality of PRACH signals, and a plurality of PRACH resources used by the PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals;

the network side equipment determines a quasi co-location signal of a first downlink signal based on the target PRACH resource;

the first downlink signal is an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message.

In a third aspect, there is provided a random access apparatus comprising:

a first sending module, configured to send a plurality of physical random access channel PRACH signals, where a plurality of PRACH resources used by the plurality of PRACH signals respectively correspond to a plurality of different downlink reference signals;

In a fourth aspect, there is provided a random access apparatus comprising:

a first receiving module, configured to receive a plurality of PRACH signals, where a plurality of PRACH resources used by the plurality of PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals;

a fourth determining module, configured to determine a quasi co-sited signal of the first downlink signal based on the target PRACH resource;

In a fifth aspect, there is provided a terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to:

transmitting a plurality of Physical Random Access Channel (PRACH) signals, wherein a plurality of PRACH resources used by the PRACH signals respectively correspond to a plurality of different downlink reference signals;

In a seventh aspect, a network side device is provided, the network side device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions implementing the steps of the method according to the second aspect when executed by the processor.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, where the communication interface is configured to:

receiving a plurality of PRACH signals, wherein a plurality of PRACH resources used by the PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals;

The processor is configured to:

determining a quasi co-sited signal of a first downlink signal based on the target PRACH resource;

In a ninth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the second aspect.

In a tenth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the second aspect.

In an eleventh aspect, a computer program/program product is provided, the computer program/program product being stored in a non-transitory storage medium, the program/program product being executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

In the embodiment of the application, the target PRACH resources in the plurality of PRACH resources used by the plurality of PRACH signals are associated with the quasi co-located signal, so that the quasi co-located signal associated with the target PRACH resources can be indicated by using the target PRACH resources to ensure that the terminal and the network side equipment have consistent understanding on aiming at the co-located signal, and further successful transmission of the downlink signal is effectively ensured.

Drawings

Fig. 1 is a block diagram illustrating a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is one of schematic random access flow diagrams provided in the embodiments of the present application;

fig. 3 is a second schematic diagram of a random access procedure according to an embodiment of the present application;

fig. 4 is a third schematic diagram of a random access procedure according to an embodiment of the present application;

fig. 5 is a schematic diagram of a random access procedure according to an embodiment of the present application;

fig. 6 is a schematic diagram of a transmission beam of a PRACH signal according to an embodiment of the present application;

fig. 7 is a second schematic diagram of a transmission beam of a PRACH signal according to an embodiment of the present application;

fig. 8 is a signal quality diagram corresponding to a transmission beam of a PRACH signal provided in an embodiment of the present application;

fig. 9 is one of flow diagrams of a random access method provided in an embodiment of the present application;

fig. 10 is a second flowchart of a random access method according to an embodiment of the present disclosure;

fig. 11 is one of schematic structural diagrams of a random access device according to an embodiment of the present application;

fig. 12 is a second schematic structural diagram of a random access device according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

fig. 14 is a schematic hardware structure of a terminal device implementing an embodiment of the present application;

Fig. 15 is a schematic hardware structure of a network side device for implementing an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (sings)le-carrier Frequency-Division Multiple Access, SC-FDMA) and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which the embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be called a terminal Device or a User Equipment (UE), and the terminal 11 may be a terminal-side Device such as a mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a notebook (Personal Digital Assistant, PDA), a palm Computer, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and the Wearable Device includes: smart watches, bracelets, headphones, eyeglasses, etc. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, wherein the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

In order to facilitate a clearer understanding of the various embodiments of the present application, some relevant background knowledge is first presented below.

(1) A random access flow;

in the prior art, NR supports two types of random access procedures: a 4-step Random Access (RA) type of Msg1 (4-step physical Random Access channel (Physical Random Access Channel, RACH)) and a 2-step RA type of MsgA (2-step RACH).

Fig. 2 is one of the random access procedure diagrams provided in the embodiment of the present application, fig. 3 is the second of the random access procedure diagrams provided in the embodiment of the present application, fig. 4 is the third of the random access procedure diagrams provided in the embodiment of the present application, fig. 5 is the fourth of the random access procedure diagrams provided in the embodiment of the present application, and as shown in fig. 2-5, both types of RA procedure support Contention-based random access (CBRA) and Contention-free random access (CFRA). The 2-step RACH procedure is generally applied to a better coverage area, so that the access time of the terminal is shortened. And for areas of poor signal coverage, the terminal should access the cell using the 4-step RACH procedure.

In the 4-step RACH, a User Equipment (UE) firstly transmits Msg1 to a network side device, including a preamble; after the UE has sent the preamble, it will listen to the physical downlink control channel (Physical Downlink Control Channel, PDCCH) within a random access response time window (RA Response window, RAR), receive a random access response (Random Access Response, RAR) scheduled by DCI format 1_0 and scrambled with a random access-radio network temporary identifier (RA-Radio Network Temporary Identifier, RA-RNTI). If the preamble index (preamble index) in the RAR is the same as the preamble index of the Msg1 sent by the UE, the UE considers that the RAR is successfully received, and at this time, the UE may stop monitoring the RAR and send Msg3 according to the UL grant carried in the RAR; msg3 is transmitted on an uplink shared channel (Uplink Shared Channel, UL-SCH), and the PDCCH is scrambled with TC-RNTI indicated by the RAR using a hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ), and retransmission of Msg3 is scheduled with DCI format 0_0. The Msg3 contains a UE-unique flag that will be used for conflict resolution in step 4. After receiving the Msg3, the network side equipment schedules the PDCCH scrambled by the TC-RNTI to the Msg4, and when the UE successfully decodes UE Contention Resolution Identity MAC control element contained in the Msg4 and UE Contention Resolution Identity sent by the Msg3 are matched, the UE confirms that the random access is successful and sets the C-RNTI as the TC-RNTI, namely the 4-step random access is completed.

(2) A selection method of PRACH signal association SSB;

the selection method of the SSB related to the PRACH signal comprises the following steps: after the terminal completes the synchronization procedure, the terminal receives and detects all SSB signals in the initial downlink BWP (Bandwidth Part), and obtains signal quality of different SSBs (Synchronization Signal Reference Signal Received Power, SS-RSRP). The terminal performs SSB selection based on a Threshold RSRP-Threshold SSB indicated in the system message (System Information Block #1, SIB 1). If there is an SSB (may be multiple SSBs) with SS-RSRP above the threshold, the terminal selects one SSB from the SSBs above the threshold as the associated SSB for the random access procedure; if the signal quality of all SSBs is below the threshold, the terminal may select any SSB as the associated SSB for the random access procedure, and the specific SSB selection scheme may be implemented based on the terminal.

And the terminal determines the time-frequency resource or preamble resource of the PRACH signal by using the selected SSB. The transmission beam/QCL parameters of the downlink signals Msg2 and Msg4 in the random access procedure are guaranteed to be the same as the selected SSB.

(3) Receiving beam information of the terminal;

under the existing mechanism, the PRACH signal is not repeatedly transmitted, after the PRACH signal is transmitted, the terminal performs RAR (Msg 2) and PDCCH for scheduling RAR, PDCCH for scheduling Msg3 retransmission, and Msg4 (including physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) and physical downlink control channel (Physical Downlink Control Channel, PDCCH) for scheduling PDSCH) are received, assuming that the antenna port of the demodulation reference signal (Demodulation Reference Signal, DMRS) and the SSB or CSI-RS associated with the UE for transmitting PRACH are quasi co-located, and whether the terminal indicates the transmission configuration indication state (Transmission Configuration Indicator state, TCI state) of CORESET for receiving DCI format 1-0 by the network or not, the PDCCH (the format of the PDCCH is DCI format 1-0) is quasi co-located in the above manner.

In addition, for CORESET #0, the terminal assumes that the antenna port of the DMRS received by the PDCCH in this CORESET and the downlink signal are quasi co-located.

One or more downlink reference signals are configured through a TCI state, where the TCI state is indicated to CORESET through a MAC CE activation command, or if the TCI state of CORESET is not indicated by a MAC CE received after a last random access procedure, SSB and the DMRS determined by the terminal in the last random access procedure are quasi co-located, and the random access procedure is not a PDCCH order triggered non-contention random access procedure.

(4) Multiple SSB-associated random access procedure.

In the cell edge area or the coverage limited area, the coverage performance of the uplink signal of the terminal is inferior to that of the downlink signal, and the coverage performance of the Msg1 and the Msg3 is inferior to that of the Msg2 and the Msg4 in the random access process. In addition, in the high-frequency band FR2, the coverage performance gap between the uplink and downlink channels is more obvious.

In order to improve the coverage performance of the uplink signal, a scheme of repeatedly transmitting the uplink signal is considered. The repeated transmission mechanism of the Msg3 is introduced to improve the coverage performance of the Msg3, and the repeated transmission of the Msg1 (PRACH) can also be introduced to improve the coverage performance.

Fig. 6 is a schematic diagram of a transmission beam of a PRACH signal provided in an embodiment of the present application, and fig. 7 is a schematic diagram of a second transmission beam of a PRACH signal provided in an embodiment of the present application, where, as shown in fig. 6 and 7, a transmission beam SSB in fig. 6 corresponds to a transmission beam SSB in fig. 7, in a coverage-limited scenario, since SSB beams are generally fixed beams, there may be a region of beam overlap between SSB beams. Fig. 8 is a signal quality diagram corresponding to a transmission beam of a PRACH signal provided in the embodiment of the present application, as shown in fig. 8, in this case, the signal quality SS-RSRP of multiple SSBs detected by a terminal may be similar, and selecting one of the SSB beams for random access, which means that other possible SSB beams are abandoned. And if a plurality of SSBs can be selected to send the Msg1, the probability of successful detection of the Msg1 by the network side equipment can be improved. Furthermore, since the measurement of SS-RSRP is determined only from a single measurement result of SSB in the random access phase, there may be a measurement bias in the SS-RSRP measurement result, and thus selecting a plurality of SSB transmissions Msg1 may also reduce the effect of the SSB measurement bias on SSB selection.

The following description of co-location alignment is explained as follows:

In the embodiment of the application, the descriptions of the PDCCH, the PDSCH and the SSB/CSI-RS quasi co-location are the same as the descriptions of the PDCCH, the DMRS (antenna port) of the PDSCH and the SSB/CSI-RS quasi co-location, or the quasi co-location attributes of the two are the same.

The TCI state refers to the network indicating that the downlink channel PDCCH, PDSCH (DMRS antenna port) and a certain downlink RS (SSB/CSI-RS) are quasi co-sited.

The quasi co-located attributes include: doppler shift (Doppler shift), doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread), and spatial reception parameters (spatial RX parameters).

The random access method and the random access device provided by the embodiments of the present application are described below with reference to the accompanying drawings through some embodiments and application scenarios thereof.

Fig. 9 is one of flow diagrams of a random access method according to an embodiment of the present application, as shown in fig. 9, where the method includes:

step 900, a terminal device sends a plurality of physical random access channel PRACH signals, wherein a plurality of PRACH resources used by the plurality of PRACH signals respectively correspond to a plurality of different downlink reference signals;

Specifically, the plurality of different downlink reference signals may be a subset of the SSB set or the CSI-RS set, which are determined by the terminal according to a predefined rule of a protocol or a rule indicated by a system message, and are used to determine transmission resources of the plurality of PRACH signals, respectively.

Alternatively, the terminal device may send a plurality of physical random access channel PRACH signals to the network side device.

Alternatively, the plurality of PRACH resources used by the plurality of PRACH signals may correspond to a plurality of different downlink reference signals, respectively, which may be SSBs or CSI-RS configured in advance.

Alternatively, a target PRACH resource of the plurality of PRACH resources may be associated with the quasi co-sited signal.

Optionally, after receiving the plurality of PRACH, the network side device may determine, based on a target PRACH resource of the plurality of PRACH resources, a quasi co-sited signal associated with the target PRACH resource of the plurality of PRACH resources.

Alternatively, the quasi co-address signal may be one or more of the plurality of different downlink reference signals.

For example, the plurality of different downlink reference signals are SSB ₀ 、SSB ₁ 、SSB ₂ And SSB (SSB) ₃ The quasi-co-address signal may be SSB ₀ Or SSB of ₁ Or SSB of ₂ Or SSB of ₃ Or a combination of a plurality of SSB, SSB ₀ And SSB (SSB) ₁ Or SSB of ₁ And SSB (SSB) ₃ Or SSB of ₀ 、SSB ₁ And SSB (SSB) ₂ Etc.

Alternatively, the quasi co-sited signal may be used for reception of the first downlink signal by the terminal device.

Optionally, under the condition that the understanding of the terminal equipment and the network side equipment aiming at the co-location signal is consistent, the detection and the receiving of the first downlink signal can be accurately realized, and the detection efficiency is improved.

Alternatively, the first downlink signal may be an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message.

Optionally, the random access method provided in the embodiment of the present application is applicable to downlink control signaling DC for scheduling Msg3 retransmission in addition to Msg2 and Msg 4.

In order to overcome the defect that under the condition that PRACH signals are sent for many times, the terminal and network side equipment aim at the inconsistent understanding of the co-located signals, so that the downlink signal transmission fails, the embodiment of the invention ensures that the network side equipment can determine the target PRACH resources after receiving a plurality of PRACH through correlating the target PRACH resources in a plurality of PRACH resources used by the terminal with the quasi co-located signals, and can determine the quasi co-located signals according to the target PRACH resources and the incidence relation between the target PRACH resources and the quasi co-located signals, so that the terminal and the network side equipment aim at the consistent understanding of the co-located signals, and further the successful transmission of the downlink signal is effectively ensured.

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

Optionally, the PRACH resources may include at least one of:

physical random access channel, opportunistic, RO, resources; or (b)

A preamble; or (b)

Mapping period of downlink reference signal and RO resource.

For example, a target RO resource of the plurality of RO resources may be associated with a quasi co-located signal.

For example, a target preamble of the plurality of preamble resources may be associated with a quasi co-sited signal.

For example, a target mapping period of the plurality of mapping periods may be associated with a quasi co-address signal.

Optionally, the first index of all the target PRACH resources associated with one quasi co-sited signal is the same.

Alternatively, the respective first indexes of the target PRACH resources may all be the same.

For example, in case the target PRACH resource is at least one RO resource, the corresponding first index of the at least one RO resource may be the same.

For example, in case the target PRACH resource is at least one preamble resource, the corresponding first index of the at least one preamble resource may be the same.

Alternatively, the plurality of PRACH resources may be all or part of the target PRACH resources.

Optionally, when the network side device receives the plurality of PRACH resources, the network side device may determine the plurality of PRACH resources, and further determine respective first indexes of the plurality of PRACH resources, and when the network side device determines that a large number of first indexes are the same based on all the first indexes, it may determine that PRACH resources corresponding to the same first indexes are target PRACH resources, and further determine quasi co-location signals associated with the first indexes based on the same first indexes.

Optionally, when all of the plurality of PRACH resources are used as target PRACH resources, after the network side device receives the plurality of PRACH resources, the plurality of PRACH resources may be determined, and further, respective first indexes of the PRACH resources may be determined, and since the first indexes are the same, a quasi co-sited signal associated with the first indexes may be determined based on the same first indexes.

Optionally, in the case that the quasi co-sited signal is plural, taking the quasi co-sited signal including SSB1 and SSB2, the target PRACH resource is a target RO resource, and the subset where the target RO resource is located may include plural RO resources with a first index being a and plural RO resources with a first index being b, where plural RO resources with a first index being a may be associated with SSB1, and plural RO resources with b first index may be associated with SSB 2; after the network side equipment receives a plurality of PRACH, a plurality of PRACH resources can be determined, and further, respective first indexes of the PRACH resources can be determined, and because the first indexes comprise a and b, SSB1 associated with the first index a can be determined to be a quasi co-location signal, and SSB2 associated with the first index b can be determined to be a quasi co-location signal.

Optionally, the first index of the target PRACH resource includes at least one of:

in the case that the PRACH resource is the RO resource, the first index of the target PRACH resource is: the index of the RO resources is in a first RO set corresponding to each downlink reference signal in the plurality of different downlink reference signals, wherein the first RO set comprises all RO resources mapped by one downlink reference signal;

Or alternatively, the process may be performed,

in the case that the PRACH resource is the preamble, the first index of the target PRACH resource is: in a first preamble set corresponding to each downlink reference signal in the plurality of different downlink reference signals, an index of the preamble is included in the first preamble set, wherein the first preamble set includes available preambles in any one RO resource mapped by the one downlink reference signal, and the available preambles are determined through system message configuration;

or alternatively, the process may be performed,

in the case that the PRACH resource is the mapping period, the first index of the target PRACH resource is: and in a first mapping period pattern corresponding to each downlink reference signal in the plurality of different downlink reference signals, respectively, the index of the mapping period, wherein the first mapping period pattern corresponding to one downlink reference signal is a mapping period pattern between the one downlink reference signal and any RO resource mapped by the one downlink reference signal.

Optionally, in the case that the PRACH resource is the RO resource, the first index of the target PRACH resource is: and in a first RO set corresponding to each downlink reference signal in the plurality of different downlink reference signals respectively, the index of the RO resources is included in the first RO set, wherein the first RO set comprises all RO resources mapped by the downlink reference signal, namely, when one downlink reference signal can be related to a plurality of continuous RO through system message configuration, the first index expresses an index value determined by the continuous RO according to the frequency or time sequence.

For example, in the case where the PRACH resource is an RO resource, msg1 may be sent by determining, from the set of RO resources associated with SSB, that one RO subset is associated with the quasi co-sited signal according to the association order of the quasi co-sited signal in the downlink reference signal repeatedly sent by the PRACH.

For example, in the case where the PRACH resource is an RO resource, the terminal device may determine the first index of the RO resource based on the order of the quasi co-sited signal in the multiple different downlink reference signals repeatedly transmitted by the Msg1, that is, the second index corresponding to the quasi co-sited signal, and based on the association relationship between the first index and the second index of the RO resource.

Optionally, in the case that the PRACH resource is the preamble, the first index of the target PRACH resource is: and in a first preamble set corresponding to each downlink reference signal in the plurality of different downlink reference signals, the index of the preamble is included in the first preamble set, wherein the first preamble set includes all available preambles in any RO resource mapped by the downlink reference signal, the available preambles are determined through system message configuration, and the available preambles are preambles which can be used for Msg1 retransmission.

For example, in the case that the PRACH resource is a preamble, it may be determined that one preamble subset is associated with the quasi-co-sited signal from a preamble set for Msg1 retransmission according to an association order of the quasi-co-sited signal in the repeatedly transmitted reference signal to transmit Msg1.

For example, in the case that the PRACH resource is a preamble, the terminal device may determine the first index of the preamble based on the order of the quasi co-sited signal in the multiple different downlink reference signals repeatedly sent by the Msg1, that is, the second index corresponding to the quasi co-sited signal, and based on the association relationship between the first index of the preamble and the second index.

Optionally, in the case that the PRACH resource is the mapping period, the first index of the target PRACH resource is: and in a first mapping period pattern corresponding to each downlink reference signal in the plurality of different downlink reference signals, the index of the mapping period is included in the first mapping period pattern (association pattern period), wherein the first mapping period pattern (association pattern period) includes a plurality of continuous mapping periods, and the starting moment and the time length of the first mapping period pattern are defined by a protocol or configured by a system message.

For example, in a mapping period of SSB to RO resources, different time ranges or mapping periods correspond to different quasi co-sited signals.

Optionally, in the case that the PRACH resource is an RO resource, for any SSB of the SSBs transmitting multiple PRACH, it may be determined that an RO resource with the index of the first index in the RO set mapped by the SSB is a target resource, that is, an RO resource with the index of the first index is determined for each SSB in the SSBs as a target resource, for transmitting Msg1; in the case that the PRACH resource is a preamble or a mapping period, reference may be made to the case that the PRACH resource is an RO resource, which will not be described herein.

Optionally, a second index of the quasi co-address signal is associated with the first index;

the second index is an index of the quasi co-sited signal in the plurality of different downlink reference signals.

Alternatively, the second index of the quasi co-sited signal may be associated with the first index of the target PRACH resource.

Alternatively, the second index of the quasi co-address signal may be an index of the quasi co-address signal in a plurality of different downlink reference signals.

For example, the terminal selects to use a set of SSBs to transmit Msg1 multiple times, the terminal selects a set of SSBs (multiple different downlink reference signals) as SSB (i_0), SSB (i_1), … SSB (i_n-1), and the terminal selects SSB (j) as the quasi co-sited signal for Msg2 and Msg4, and the second index of the quasi co-sited signal may be j. For example, j represents the position of SSB (j) in the set SSB (i_0), SSB (i_1), … SSB (i_n-1) from small to large by SSB number.

Optionally, the association between the second index and the first index comprises a mathematical relationship.

Alternatively, the association between the second index and the first index may comprise a mathematical relationship.

Alternatively, the mathematical relationship may be predefined by a protocol or configured by a system message.

For example, in a set of SSBs { SSB (i_0), SSB (i_1), … SSB (i_n-1) } that are used by the terminal to transmit PRACH signals multiple times, each SSB is used for an associated M RO resource transmitted by Msg1, and M >1 (the size of M may be determined by the system message configuration, in which case M resources for each SSB to transmit Msg1 are different from each other), there may be a mathematical mapping relationship according to a predefined rule or a rule configured by the system message for the order of M RO resources and quasi-co-location signals SSB (j) (second index), a subset of M ROs may be used for transmitting SSB sets { SSB (i_0), SSB (i_1), … SSB (i_n-1) } and the quasi-co-location signal SSB (j) of the first downlink signal is repeatedly transmitted, i.e.e. from SSB (i) to select a sub-set of quasi-co-location signals for Msg1 according to the associated one downlink signal SSB set of Msg1 transmitted by Msg1. The manner of determining the target RO subset corresponding to the quasi-co-address signal SSB (j) may be M mod n=j, m=0, 1, …, M-1 represents an index of M ROs, or [ j (M/N) +0, j (M/N) + (M/N-1) ] or other subset dividing manners, where mod represents a remainder.

For example, the index set of preambles in RO resources associated with one SSB is p_0 to p_k-1, according to a predefined rule, there may be a mathematical mapping relationship between K preambles and the order (second index) of quasi co-sited signals SSB (j), a subset of K preambles may be used to send the SSB set { SSB (i_1), SSB (i_2), … SSB (i_n) } of PRACH multiple times and the Msg1 of the quasi co-sited signal SSB (j) of the first downlink signal is repeatedly transmitted. The determination of the target preamble subset corresponding to the quasi co-address signal SSB (j) may be K mod n=j, m=0, 1, …, K-1 represents an index of K preambles, or [ j (M/N) +0, j (M/N) + (M/N-1) ] or other subset division manners, where mod represents a remainder.

For example, the association periods of SSBs with RO resources may correspond to different quasi co-address signals SSB (j). Consecutive x×n (x is a positive integer, defined by a protocol or configured by a system message) from a reference time point (e.g., radio frame 0) are associated with N SSBs in the SSB set { SSB (i_1), SSB (i_2), … SSB (i_n) } for association periods of SSBs and ROs for Msg1 transmission. According to the protocol definition, the association of SSB and RO resources for Msg1 transmission is mapped starting from radio frame 0, so that the first association period may correspond to quasi co-sited signal SSB (j=i_0), the second association period may correspond to quasi co-sited signal SSB (j=i_1), and so on.

In the embodiment of the application, the target PRACH resource and the quasi co-location signal are associated through the mathematical mapping relation, so that the quasi co-location signal can be determined according to the association relation of the target PRACH resource and the quasi co-location signal, the terminal and the network side equipment can be guaranteed to have consistent understanding on the co-location signal, and successful transmission of the downlink signal is further effectively guaranteed.

Optionally, before the terminal device transmits the plurality of physical random access channel PRACH signals, the method further comprises:

the terminal equipment determines the quasi co-location signal from the plurality of different downlink reference signals;

the terminal equipment determines the first index associated with a second index based on the second index of the quasi co-located signal;

the terminal device determines the target PRACH resources of the plurality of PRACH signals based on the first index.

Alternatively, the terminal device may determine the quasi co-sited signal from a plurality of different downlink reference signals.

Alternatively, the terminal device may determine the first index associated with the second index based on the second index of the quasi co-sited signal.

Alternatively, the terminal device may determine the first index associated with the second index based on the second index of the quasi co-sited signal and based on a mathematical relationship between the second index and the first index.

Alternatively, the terminal device may determine target PRACH resources of the plurality of PRACH signals based on the first index.

For example, the terminal device may determine target RO resources corresponding to the first index of the plurality of PRACH signals based on the second index and based on a mathematical relationship between the first index and the second index, and select one target RO resource from the target RO resources as the Msg1 transmission resource.

For example, the terminal device may determine, based on the second index and based on a mathematical relationship between the first index and the second index, a target preamble resource corresponding to the first index of the plurality of PRACH signals, and select one target preamble resource from the target preamble resources as the Msg1 transmission resource.

For example, the terminal device may determine the target mapping period for the plurality of PRACH signals based on the second index and based on a mathematical relationship between the first index and the second index.

Optionally, the determining, by the terminal device, the quasi co-sited signal from the plurality of different downlink reference signals includes:

the terminal equipment determines a downlink reference signal with the maximum value of the reference signal receiving quality from the plurality of different downlink reference signals based on the reference signal receiving quality as the quasi co-located signal.

Alternatively, the terminal device may determine, as the quasi co-sited signal, a downlink reference signal having a maximum value of reference signal reception quality from among a plurality of different downlink reference signals based on the reference signal reception quality.

Alternatively, the reference signal reception quality may comprise a Reference Signal Reception Power (RSRP) or a reference signal reception quality (Reference Signal Receiving Quality, RSRQ) or a signal-to-noise ratio (Signal to Interference plus Noise Ratio, SINR).

For example, the terminal device may select one SSB from the SSB set as a quasi co-sited signal for Msg2 and Msg 4. The selection method may include at least one of:

(1) Randomly selecting based on terminal realization;

(2) Selecting RSRP or RSRQ or SSB with the best SINR;

(3) And selecting according to the threshold value configured by the network side equipment. If there is an SSB with SS-RSRP higher than the threshold value, selecting one SSB from a plurality of SSBs meeting the condition; if there is no SSB above the threshold, then SSB may be selected according to method (1) or (2).

Alternatively, in case of SSB that does not meet the condition, the terminal device may select a preamble to send Msg1 from a set of dedicated preambles that are not used for association of quasi co-sited signals and are configured by system messages. The terminal equipment can monitor RARs corresponding to RO resources associated with all SSBs according to preset rules, namely, the terminal equipment monitors RARs corresponding to a plurality of beams; correspondingly, if the network side equipment detects the preamble in the special preamble set, the associated multiple SSBs are repeatedly transmitted by using Msg1 to send downlink signals according to a preset rule.

in the case that a first downlink reference signal exists in the plurality of different downlink reference signals, the terminal equipment randomly determines one downlink reference signal from the first downlink reference signals as the quasi co-location signal, or the terminal equipment determines a first downlink reference signal with the maximum value of the reference signal receiving quality from the first downlink reference signals as the quasi co-location signal;

in the case that the first downlink reference signal does not exist in the plurality of different downlink reference signals, the terminal equipment randomly determines one downlink reference signal from the plurality of different downlink reference signals as the quasi co-location signal, or the terminal equipment determines the downlink reference signal with the largest value of the reference signal receiving quality from the plurality of different downlink reference signals as the quasi co-location signal;

wherein the first downlink reference signal is a downlink reference signal having a value of the reference signal reception quality greater than a first threshold.

Alternatively, in the case that the first downlink reference signal exists in the plurality of different downlink reference signals, the terminal device may randomly determine one downlink reference signal from the first downlink reference signal as the quasi co-sited signal.

Alternatively, in the case where the first downlink reference signal exists among the plurality of different downlink reference signals, the terminal device may determine, as the quasi co-sited signal, the first downlink reference signal having the largest value of the reference signal reception quality from among the first downlink reference signals.

Alternatively, in the case that the first downlink reference signal does not exist in the plurality of different downlink reference signals, the terminal device may randomly determine one downlink reference signal from the plurality of different downlink reference signals as the quasi co-sited signal.

Alternatively, in the case that the first downlink reference signal does not exist in the plurality of different downlink reference signals, the terminal device may determine, as the quasi co-located signal, a downlink reference signal having the highest value of reference signal reception quality from the plurality of different downlink reference signals.

Alternatively, the first downlink reference signal may be a downlink reference signal having a reference signal reception quality value greater than a first threshold.

Optionally, the first threshold may be a threshold configured by the network side device, or may be a preset threshold, which is not specifically limited in the embodiment of the present application.

Optionally, the size of the first threshold may be arbitrarily configured or set according to requirements, which is not specifically limited in the embodiments of the present application.

Optionally, the terminal device sends a plurality of physical random access channel PRACH signals, including:

the terminal equipment randomly determines a plurality of PRACH resources and sends a plurality of PRACH signals;

the method further comprises the steps of:

the terminal device determines the quasi co-sited signal based on a target PRACH resource of the plurality of PRACH resources determined randomly.

Alternatively, the terminal device may randomly determine a plurality of PRACH resources and transmit a plurality of PRACH signals.

For example, the terminal device may randomly determine a plurality of RO resources and transmit a plurality of PRACH signals.

For example, the terminal device may randomly determine a plurality of preamble resources and transmit a plurality of PRACH signals.

Alternatively, the terminal device may determine the quasi co-sited signal based on a target PRACH resource of the randomly determined plurality of PRACH resources.

Alternatively, the terminal device may determine the transmission resource of Msg1 (for example, the RO index or preamble or the transmission time of Msg 1) based on the reference signal association sequence in which the selected quasi co-located signal is repeatedly transmitted at Msg1.

For example, when one SSB is associated with a plurality of RO resources, the terminal device may determine one RO subset to transmit Msg1 from the plurality of RO resources associated with the SSB according to the reference signal association order in which the quasi co-sited signals are repeatedly transmitted at Msg1.

For example, the terminal device determines a preamble subset from the preamble set included in each RO resource to send Msg1 according to the reference signal association sequence in which the quasi co-address signal is repeatedly sent at Msg1.

For example, different time ranges (mapping periods) in the mapping period of SSB to RO resources may correspond to different quasi co-sited signals.

Alternatively, the terminal device may select the quasi co-sited signal based on rules predefined by the protocol or rules configured by the system message. The rule may be an association relationship between the first index and the second index mentioned above.

Optionally, the terminal device determines a reception beam of the first downlink signal according to the quasi co-located signal. The random access method provided in the embodiment of the present application is described below by means of a specific embodiment.

It is assumed that the terminal device randomly selects a target resource from the resources (RO and preamble) of Msg1 and transmits Msg1. The network side device and the terminal can determine quasi co-located signals (SSB/CSI-RS) of Msg2 and Msg4 according to the resource of Msg1. The terminal determines the receive beams for Msg2 and Msg4 from the quasi co-located signal.

For example, when the terminal device repeatedly transmits the Msg1, the preamble I resource is used, and according to the rule defined by the protocol or configured by the system message, the preamble I corresponds to the SSB (J) associated with the Msg1 transmitted by the J-th time when the Msg1 is repeatedly transmitted, and then the network side device and the terminal device use the SSB (J) as the quasi co-sited signals of the Msg2 and the Msg 4.

For example, the terminal device selects SSB ₀ And SSB (SSB) ₁ As the associated SSB repeatedly transmitted by Msg 1. Terminal equipment in SSB ₀ Associated RO resources and SSB ₁ Msg1 is sent on the associated RO resources, respectively, and the preamble index is the same. If the preamble index is even, the network side device and the terminal device can use SSB ₀ As quasi co-address signals transmitted by Msg2 and Msg 4; if odd, SSB can be used ₁ As a quasi co-address signal.

Fig. 10 is a second flowchart of a random access method according to an embodiment of the present application, as shown in fig. 10, where the method includes:

step 1000, a network side device receives a plurality of PRACH signals, where a plurality of PRACH resources used by the plurality of PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals;

Step 1010, the network side device determines a quasi co-location signal of a first downlink signal based on the target PRACH resource;

Optionally, the network side device may receive a plurality of PRACH signals sent by the terminal device.

For example, a target resource of the plurality of RO resources may be associated with a quasi co-located signal.

Alternatively, the quasi co-address signal may be one or more of a plurality of different downlink reference signals.

For example, the plurality of different downlink reference signals are SSB ₀ 、SSB ₁ 、SSB ₂ And SSB (SSB) ₃ The quasi-co-address signal may be SSB ₀ Or SSB of ₁ Or SSB of ₂ Or SSB of ₃ SSB may also be used ₀ And SSB (SSB) ₁ Or SSB of ₁ And SSB (SSB) ₃ Or SSB of ₀ 、SSB ₁ And SSB (SSB) ₂ Etc.

Optionally, the network side device may determine a quasi co-sited signal of the first downlink signal based on the target PRACH resource.

Optionally, when the terminal sends the Msg1, the terminal selects a target resource according to a predefined rule of a protocol, and after detecting the Msg1, the network side device can determine quasi co-sited signals (SSB/CSI-RS) of the Msg2 and the Msg4 according to RO resources or preamble resources used by the Msg 1.

For example, when transmitting Msg1, the terminal selects preamble resources according to a predefined rule of a protocol, and the network side device determines quasi co-location signals of Msg2 and Msg4 according to the preamble index.

Optionally, the random access method provided in the embodiment of the present application is applicable to, in addition to Msg2 and Msg4, quasi co-location signals of PDCCH for scheduling Msg3 retransmission.

The random access method provided in the embodiment of the present application is described in the following by a specific embodiment.

In the initial access phase, the terminal device chooses to send Msg1 multiple times using a set of SSBs, the terminal-selected set of SSBs being SSB (i_0), SSB (i_1), … SSB (i_n-1), and its corresponding signal quality being SS-RSRP (i_0), SS-RSRP (i_1), … SS-RSRP (i_n-1).

Alternatively, the terminal device may select one SSB from the SSB set as a quasi co-sited signal for Msg2 and Msg 4. The selection method may include at least one of:

(1) Randomly selecting based on terminal realization;

(2) Selecting RSRP or RSRQ or SSB with the best SINR;

For example, the terminal selects SSB (j) as the quasi co-sited signal for Msg2 and Msg4, SSB (j) belonging to SSB set { SSB (i_0), SSB (i_1), … SSB (i_N-1) }. The order of SSBs (j) in the SSB set may be j according to the SSB index or SSB association order when Msg1 is repeatedly transmitted.

Alternatively, the terminal device may determine RO resources or preambles or time periods transmitted by Msg1 according to the order of the quasi co-located signals SSB (j).

For example, in a set of SSBs { SSB (i_0), SSB (i_1), … SSB (i_n-1) } that are used by the terminal to transmit PRACH signals multiple times, each SSB is used for an associated M RO resource transmitted by Msg1, and M >1 (the size of M may be determined by the system message configuration, in which case M resources for each SSB to transmit Msg1 are different from each other), there may be a mathematical mapping relationship according to a predefined rule or a rule configured by the system message for the order of M RO resources and quasi-co-location signals SSB (j) (second index), a subset of M ROs may be used for transmitting SSB sets { SSB (i_0), SSB (i_1), … SSB (i_n-1) } and the quasi-co-location signal SSB (j) of the first downlink signal is repeatedly transmitted, i.e.e. from SSB (i) to select a sub-set of quasi-co-location signals for Msg1 according to the associated one downlink signal SSB set of Msg1 transmitted by Msg1. The manner of determining the RO subset may be M mod n=j, m=0, 1, …, M-1 represents an index of M ROs, or [ j (M/N) +0, j (M/N) + (M/N-1) ] or other subset division manners, where mod represents a remainder.

For example, the set of preamble numbers in the associated RO resource of one SSB is p_0 to p_k-1, and according to a predefined rule, there is a mapping relationship between K preambles and the order of the quasi co-sited signals SSB (j), and a subset of K preambles may be used for repeatedly transmitting SSB sets { SSB (i_1), SSB (i_2), … SSB (i_n) } of PRACH and Msg1 of the quasi co-sited signal SSB (j) of the first downlink signal. The preamble subset may be determined by K mod n=j, m=0, 1, …, K-1 represents the number of K preambles, or [ j (M/N) +0, j (M/N) + (M/N-1) ] or other subset dividing means, where mod represents the remainder.

For example, the association periods of SSB and RO resources correspond to different quasi-co-address signals SSB (j). Consecutive x×n (x is a positive integer, defined by a protocol or configured by a system message) from a reference time point (e.g., radio frame 0) are associated with N SSBs in the SSB set { SSB (i_1), SSB (i_2), … SSB (i_n) } for association periods of SSBs and ROs for Msg1 transmission. According to the protocol definition, the association of SSB with RO resources for Msg1 transmission is mapped starting from radio frame 0, so that the first association period corresponds to quasi co-sited signal SSB (j=i_0), the second association period corresponds to quasi co-sited signal SSB (j=i_1), and so on.

Alternatively, the terminal device may select RO resources and preamble resources from the set to transmit Msg1.

Optionally, after detecting the repeatedly sent Msg1, the network side device may determine the quasi co-located reference signals of Msg2 and Msg4 according to the RO resource and the preamble resource. In the embodiment of the application, the network side equipment determines the quasi co-location signal through the association relation between the target PRACH resource and the quasi co-location signal in the plurality of PRACH resources used by the plurality of received PRACH signals so as to ensure that the network side equipment and the terminal aim at the co-location signal to have consistent understanding, and further effectively ensure successful transmission of the downlink signal.

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

Optionally, the PRACH resources may include at least one of:

physical random access channel, opportunistic, RO, resources; or (b)

A preamble; or (b)

And mapping period of the downlink reference signal and the RO resource.

Alternatively, the respective first indices of the target PRACH resources may be the same.

For example, in case that the target PRACH resource is at least one RO resource, the first index corresponding to the at least one RO resource may be the same.

For example, in the case that the target PRACH resource is at least one preamble resource, the first index corresponding to the at least one preamble resource may be the same.

or alternatively, the process may be performed,

in the case that the PRACH resource is the mapping period, the first index of the target PRACH resource is: and in a first mapping pattern period corresponding to each downlink reference signal in the plurality of different downlink reference signals respectively, indexing the mapping period, wherein the first mapping pattern period comprises a plurality of continuous mapping periods, and the starting moment and the time length of the first mapping pattern period are defined by a protocol or configured by a system message.

For example, in the case where the PRACH resource is an RO resource, the terminal device may determine, from the RO resource set associated with the SSB, that one RO subset is associated with the quasi co-sited signal according to the association order of the quasi co-sited signal in the downlink reference signal repeatedly sent by the PRACH, to send Msg1.

Optionally, in the case that the PRACH resource is a preamble, the first index of the target PRACH resource may be: and in a first preamble set corresponding to each downlink reference signal in the plurality of different downlink reference signals, the index of the preamble, wherein the first preamble set corresponding to one downlink reference signal comprises all preambles in any RO resource mapped by the one downlink reference signal.

For example, in the case that the PRACH resource is a preamble, the terminal device may determine, according to the association order of the quasi co-sited signal in the repeatedly transmitted reference signal, that one preamble subset is associated with the quasi co-sited signal from the preamble set for the retransmission of the Msg1 to transmit the Msg1.

Optionally, in the case that the PRACH resource is a mapping period, the first index of the target PRACH resource may be: and in a first mapping period pattern corresponding to each downlink reference signal in the plurality of different downlink reference signals, respectively, the index of the mapping period, wherein the first mapping period pattern corresponding to one downlink reference signal is a mapping period pattern between the one downlink reference signal and any RO resource mapped by the one downlink reference signal.

Optionally, in the case that the PRACH resource is an RO resource, for any SSB of the SSBs transmitting multiple PRACH, the terminal device may determine, as a target resource, an RO resource with a first index in the RO set mapped by the SSB, that is, one RO resource with a first index is determined for each SSB of the SSBs as a target resource, for transmitting Msg1; in the case that the PRACH resource is a preamble or a mapping period, reference may be made to the case that the PRACH resource is an RO resource, which will not be described herein.

Alternatively, the second index may be an index of the quasi co-sited signal in a plurality of different downlink reference signals.

For example, the terminal selects to use a set of SSBs to transmit Msg1 multiple times, the terminal selects a set of SSBs (multiple different downlink reference signals) as SSB (i_0), SSB (i_1), … SSB (i_n-1), and the terminal selects SSB (j) as the quasi co-sited signal for Msg2 and Msg4, and the second index of the quasi co-sited signal is j. For example, j represents the position of SSB (j) in the set SSB (i_0), SSB (i_1), … SSB (i_n-1) from small to large by SSB number.

Alternatively, the association between the second index and the first index may include a mathematical relationship.

For example, the index set of preambles in RO resources associated with one SSB is p_0 to p_k-1, according to a predefined rule, there may be a mathematical mapping relationship between K preambles and the order (second index) of quasi co-sited signals SSB (j), a subset of K preambles may be used to send the SSB set { SSB (i_1), SSB (i_2), … SSB (i_n) } of PRACH multiple times and the Msg1 of the quasi co-sited signal SSB (j) of the first downlink signal is repeatedly transmitted. The preamble subset may be determined by K mod n=j, m=0, 1, …, K-1 represents an index of K preambles, or [ j (M/N) +0, j (M/N) + (M/N-1) ] or other subset partitioning, where mod represents a remainder.

In the embodiment of the application, the network side equipment determines the quasi co-location signal through the association relation between the target PRACH resource and the quasi co-location signal in the plurality of PRACH resources used by the plurality of received PRACH signals so as to ensure that the network side equipment and the terminal aim at the co-location signal to have consistent understanding, and further effectively ensure successful transmission of the downlink signal.

It should be noted that, in the random access method provided in the embodiment of the present application, the execution body may be a random access device, or a control module of the random access device for executing the random access method. In the embodiment of the present application, a method for executing random access by a random access device is taken as an example, and the random access device provided in the embodiment of the present application is described.

Fig. 11 is one of schematic structural diagrams of a random access device according to an embodiment of the present application, as shown in fig. 11, including: a first transmitting module 1110; wherein:

the first sending module 1110 is configured to send a plurality of physical random access channel PRACH signals, where a plurality of PRACH resources used by the plurality of PRACH signals respectively correspond to a plurality of different downlink reference signals;

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

Or alternatively, the process may be performed,

or alternatively, the process may be performed,

Optionally, the apparatus further comprises: the device comprises a first determining module, a second determining module and a third determining module, wherein:

a first determining module, configured to determine, by the terminal device, the quasi co-sited signal from the plurality of different downlink reference signals before the terminal device transmits a plurality of physical random access channel PRACH signals;

a second determining module, configured to determine, before the terminal device sends a plurality of physical random access channel PRACH signals, the first index associated with a second index based on the second index of the quasi co-sited signal;

a third determining module, configured to determine, before the terminal device sends a plurality of physical random access channel PRACH signals, the target PRACH resources of the plurality of PRACH signals based on the first index.

Optionally, the first determining module is further configured to:

and determining a downlink reference signal with the maximum value of the reference signal received power quality from the plurality of different downlink reference signals as the quasi co-location signal based on the reference signal received power quality.

Optionally, the first determining module is further configured to:

in the case that a first downlink reference signal exists in the plurality of different downlink reference signals, the terminal equipment randomly determines one downlink reference signal from the first downlink reference signals as the quasi co-location signal, or the terminal equipment determines a first downlink reference signal with the maximum value of the received power quality of the reference signal from the first downlink reference signals as the quasi co-location signal;

in the case that the first downlink reference signal does not exist in the plurality of different downlink reference signals, the terminal equipment randomly determines one downlink reference signal from the plurality of different downlink reference signals as the quasi co-location signal, or the terminal equipment determines the downlink reference signal with the maximum value of the reference signal received power quality from the plurality of different downlink reference signals as the quasi co-location signal;

wherein the first downlink reference signal is a downlink reference signal having a received power quality of the reference signal greater than a first threshold.

Optionally, the first sending module is further configured to:

randomly determining a plurality of PRACH resources and transmitting the PRACH signals;

The quasi co-sited signal is determined based on a target PRACH resource of the plurality of PRACH resources that is randomly determined.

Fig. 12 is a second flowchart of a random access device according to an embodiment of the present application, as shown in fig. 12, including: a first receiving module 1210 and a fourth determining module 1220; wherein:

the first receiving module 1210 is configured to receive a plurality of PRACH signals, where a plurality of PRACH resources used by the plurality of PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals;

a fourth determining module 1220 is configured to determine a quasi co-sited signal of the first downlink signal based on the target PRACH resource;

Alternatively, the random access device may receive a plurality of PRACH signals through the first receiving module 1210; the quasi co-sited signal of the first downlink signal is then determined by a fourth determination module 1220 based on the target PRACH resource.

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

Or alternatively, the process may be performed,

or alternatively, the process may be performed,

The random access device in the embodiment of the present application may be a device, a device with an operating system or an electronic device, or may be a component, an integrated circuit, or a chip in a terminal. The apparatus or electronic device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in detail.

The random access device provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 9 and fig. 10, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Optionally, fig. 13 is a schematic structural diagram of a communication device provided in an embodiment of the present application. As shown in fig. 13, the embodiment of the present application further provides a communication device 1300, including a processor 1301, a memory 1302, and a program or an instruction stored in the memory 1302 and capable of running on the processor 1301, where, for example, the communication device 1300 is a terminal, the program or the instruction implements each procedure of the random access method embodiment described above when executed by the processor 1301, and can achieve the same technical effects. When the terminal device 1300 is a network side device, the program or the instruction, when executed by the processor 1301, implements the respective processes of the above random access method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for: transmitting a plurality of Physical Random Access Channel (PRACH) signals, wherein a plurality of PRACH resources used by the PRACH signals respectively correspond to a plurality of different downlink reference signals; wherein a target PRACH resource of a plurality of PRACH resources used by the plurality of PRACH signals is associated with a quasi co-sited signal; the quasi co-located signal is one or more of the plurality of different downlink reference signals; the quasi co-address signal is used for receiving a first downlink signal by the terminal equipment, wherein the first downlink signal is an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the terminal embodiment and can achieve the same technical effects. Specifically, fig. 14 is a schematic hardware structure of a terminal device implementing an embodiment of the present application.

The terminal device 1400 includes, but is not limited to: at least part of the components of the radio frequency unit 1401, the network module 1402, the audio output unit 1403, the input unit 1404, the sensor 1405, the display unit 1406, the user input unit 1407, the interface unit 1408, the memory 1409, the processor 1410, and the like.

Those skilled in the art will appreciate that the terminal device 1400 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor 1410 by a power management system to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal device structure shown in fig. 14 does not constitute a limitation of the terminal device, and the terminal device may include more or less components than those shown in the drawings, or may combine some components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1404 may include a graphics processor (Graphics Processing Unit, GPU) 14041 and a microphone 14042, with the graphics processor 14041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1406 may include a display panel 14061, and the display panel 14061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1407 includes a touch panel 14071 and other input devices 14072. The touch panel 14071 is also referred to as a touch screen. The touch panel 12071 may include two parts, a touch detection device and a touch controller. Other input devices 14072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from a network side device, the radio frequency unit 1401 processes the downlink data with the processor 1410; in addition, the uplink data is sent to the network side equipment. Typically, the radio frequency unit 1401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 1409 may be used to store software programs or instructions and various data. The memory 1409 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 1409 may include a high-speed random access Memory, and may also include a nonvolatile Memory, where the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable EPROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

Processor 1410 may include one or more processing units; alternatively, the processor 1410 may integrate an application processor that primarily processes operating systems, user interfaces, and applications or instructions, etc., with a modem processor that primarily processes wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1410.

Wherein the processor 1410 is configured to:

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

in the case that the PRACH resource is the RO resource, in a first RO set corresponding to each of the plurality of different downlink reference signals, an index of the RO resource is included in the first RO set, where the first RO set includes all RO resources mapped by one of the downlink reference signals;

or alternatively, the process may be performed,

Or alternatively, the process may be performed,

Optionally, the processor 1410 is further configured to: before the terminal equipment transmits a plurality of physical random access channel PRACH signals, the terminal equipment determines the quasi co-location signal from the plurality of different downlink reference signals;

Optionally, the processor 1410 is further configured to:

and determining a downlink reference signal with the maximum value of the reference signal received power quality from the plurality of different downlink reference signals as the quasi co-located signal based on the reference signal received power quality R.

Optionally, the processor 1410 is further configured to:

the method further comprises the steps of:

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the processor is used for:

the first downlink signal is an Msg2 message or an Msg3 retransmission scheduling information or an Msg4 message;

the communication interface is used for:

receiving a plurality of PRACH signals, wherein a plurality of PRACH resources used by the PRACH signals are respectively associated with a plurality of different downlink reference signals; wherein a target PRACH resource of the plurality of PRACH resources is associated with a quasi co-sited signal; the quasi co-sited signal is one or more of the plurality of different downlink reference signals.

The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application further provides a network side device, and fig. 15 is a schematic hardware structure diagram of the network side device for implementing the embodiment of the application. As shown in fig. 15, the network device 1500 includes: an antenna 1501, a radio frequency device 1502, a baseband device 1503. The antenna 1501 is connected to a radio frequency device 1502. In the uplink direction, the radio frequency device 1502 receives information via the antenna 1501, and transmits the received information to the baseband device 1503 for processing. In the downlink direction, the baseband device 1503 processes information to be transmitted, and transmits the processed information to the radio frequency device 1502, and the radio frequency device 1502 processes the received information and transmits the processed information through the antenna 1501.

The above-described band processing apparatus may be located in the baseband apparatus 1503, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 1503, where the baseband apparatus 1503 includes the processor 1504 and the memory 1505.

The baseband device 1503 may, for example, comprise at least one baseband board on which a plurality of chips are disposed, as shown in fig. 15, where one chip, for example, a processor 1504, is connected to the memory 1505 to invoke a program in the memory 1505 to perform the network device operations shown in the above method embodiments.

The baseband device 1503 may also include a network interface 1506 for interacting with the radio frequency device 1502, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the network side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 1505 and executable on the processor 1504, which are called by the processor 1504 to perform the methods performed by the modules shown in fig. 12, achieve the same technical effects, and are not repeated here.

Optionally, the processor 1504 is configured to:

optionally, the communication interface 1504 is for:

Optionally, the PRACH resources include at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

or alternatively, the process may be performed,

Or alternatively, the process may be performed,

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the processes of the foregoing random access method embodiment are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is configured to run a program or an instruction, implement each process of the random access method embodiment, and achieve the same technical effect, so as to avoid repetition, and not be repeated here.

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

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a non-transitory storage medium, and the program/program product is executed by at least one processor to implement each process of the foregoing random access method embodiment, and the same technical effects are achieved, so that repetition is avoided, and details are not repeated herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a communication device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A random access method, comprising:

2. The random access method of claim 1, wherein the PRACH resources comprise at least one of:

Physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

3. The random access method of claim 2, wherein the first index of all the target PRACH resources associated with one quasi co-sited signal is the same.

4. The random access method of claim 3, wherein the first index of the target PRACH resource comprises at least one of:

or alternatively, the process may be performed,

Or alternatively, the process may be performed,

5. A random access method according to any one of claims 1 to 4, characterized in that,

a second index of the quasi co-address signal is associated with the first index;

6. The random access method of claim 5, wherein the association between the second index and the first index comprises a mathematical relationship.

7. The random access method according to claim 5 or 6, characterized in that before the terminal device transmits a plurality of physical random access channel PRACH signals, the method further comprises:

8. The random access method of claim 7, wherein the terminal device determining the quasi co-sited signal from the plurality of different downlink reference signals comprises:

and the terminal equipment determines a downlink reference signal with the maximum value of the reference signal receiving quality from the plurality of different downlink reference signals as the quasi co-location signal.

9. The random access method of claim 7, wherein the terminal device determining the quasi co-sited signal from the plurality of different downlink reference signals comprises:

10. The random access method according to any one of claims 1-4 or 6, wherein the terminal device transmits a plurality of physical random access channel, PRACH, signals, comprising:

the method further comprises the steps of:

11. A random access method, comprising:

12. The random access method of claim 11, wherein the PRACH resources comprise at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

13. The random access method of claim 12, wherein the first index of all the target PRACH resources associated with one quasi co-sited signal is the same.

14. The random access method of claim 13, wherein the first index of the target PRACH resource comprises at least one of:

Or alternatively, the process may be performed,

or alternatively, the process may be performed,

15. The random access method according to any of claims 11-14, wherein a second index of the quasi co-sited signal is associated with the first index;

16. The random access method of claim 15, wherein the association between the second index and the first index comprises a mathematical relationship.

17. A random access device, comprising:

18. The random access device of claim 17, wherein the PRACH resources comprise at least one of:

physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

19. The random access device of claim 18, wherein the first index of all of the target PRACH resources associated with one quasi co-sited signal is the same.

20. The random access device of claim 19, wherein the first index of the target PRACH resource comprises at least one of:

or alternatively, the process may be performed,

21. The random access device according to any of claims 17-20, wherein a second index of the quasi co-sited signal is associated with the first index;

22. The random access device of claim 21, wherein the association between the second index and the first index comprises a mathematical relationship.

23. The random access device according to claim 21 or 22, characterized in that the device further comprises:

24. The random access device of claim 23, wherein the first determining means is further configured to:

and determining a downlink reference signal with the maximum value of the reference signal receiving quality from the plurality of different downlink reference signals as the quasi co-location signal.

25. The random access device of claim 23, wherein the first determining means is further configured to:

26. The random access device according to any of claims 17-20 or 22, wherein the first transmitting module is further configured to:

27. A random access device, comprising:

28. The random access device of claim 27, wherein the PRACH resources comprise at least one of:

Physical random access channel, opportunistic, RO, resources;

a preamble;

and mapping period of the downlink reference signal and the RO resource.

29. The random access device of claim 28, wherein the first index of all of the target PRACH resources associated with one quasi co-sited signal is the same.

30. The random access device of claim 29, wherein the first index of the target PRACH resource comprises at least one of:

or alternatively, the process may be performed,

Or alternatively, the process may be performed,

31. The random access device according to any of claims 27-30, wherein a second index of the quasi co-sited signal is associated with the first index;

32. The random access device of claim 31, wherein the association between the second index and the first index comprises a mathematical relationship.

33. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which program or instruction when executed by the processor implements the steps of the random access method according to any of claims 1 to 10.

34. A network side device comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the random access method of any of claims 11 to 16.

35. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the random access method according to any of claims 1 to 10 or the steps of the random access method according to any of claims 11 to 16.