CN112399589B

CN112399589B - Random access method, terminal equipment and network equipment

Info

Publication number: CN112399589B
Application number: CN201910760472.XA
Authority: CN
Inventors: 行双双; 吴艺群; 柴晓萌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2022-04-22
Anticipated expiration: 2039-08-16
Also published as: WO2021032027A1; CN112399589A

Abstract

The application discloses a random access method, terminal equipment and network equipment, relates to the technical field of communication, and can enable the terminal equipment to make sure the sub-band position of a PUSCH (physical uplink shared channel) and improve the efficiency of sending a random access message by the terminal equipment. The method comprises the following steps: the method comprises the steps that terminal equipment receives random access configuration information sent by network equipment, wherein the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located; the terminal equipment sends a random access message to the network equipment, wherein the random access message comprises at least one of a PRACH and a PUSCH, PRACH time-frequency resources occupied by the PRACH are determined according to resource configuration information of the PRACH, and PUSCH time-frequency resources occupied by the PUSCH are determined according to resource configuration information of the PUSCH. The embodiment of the application is used for the random access process under the 5G NR-U scene.

Description

Random access method, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a random access method, a terminal device, and a network device.

Background

With the rapid development of Ultra Reliable Low Latency (URLLC) and machine communication (MTC) and internet of things (IoT), data transmission with sparse, small and low latency requirements has more and more application scenarios, and to meet the transmission of this kind of data services, a 2-step random access channel (2-step random access channel, 2-step RACH) is proposed as a scheme for reducing latency, thereby accelerating the process of random access. A complete 2-step RACH procedure is shown in fig. 1, including step 1: the method comprises the steps that a terminal device sends a message A (MsgA) to a network device, wherein the message A comprises a Physical Random Access Channel (PRACH) and a Physical Uplink Shared Channel (PUSCH) which carry a preamble sequence (preamble); step 2: the terminal device receives a response of the network device to the MsgA, namely a message B (MsgB), the response content of the MsgB including at least one of a response to a preamble and a response to a PUSCH.

In a New Radio (NR) scenario, before the terminal device sends MsgA to the network device, the network device broadcasts a PRACH configuration resource and a PUSCH configuration resource to the terminal device. In the NR unlicensed spectrum (NR-U) scenario, since a bandwidth is divided into multiple sub-bands, if a PUSCH supports transmission of multiple sub-bands during transmission, when initiating 2-step random access in the NR-U scenario, resource configuration information of the PUSCH needs to include an indication of an interlace (interlace) occupied in a frequency domain, but numbers of interlace units in the multiple sub-bands are the same, which makes a terminal device unable to explicitly send a position of a sub-band of the PUSCH.

Disclosure of Invention

The embodiment of the application provides a random access method, terminal equipment and network equipment, which can enable the terminal equipment to make sure the sub-band position of a PUSCH (physical uplink shared channel) and improve the efficiency of sending a random access message by the terminal equipment.

In a first aspect, a method for random access is provided, including: the method comprises the steps that terminal equipment receives random access configuration information sent by network equipment, wherein the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located; the terminal equipment sends a random access message to the network equipment, wherein the random access message comprises at least one of a PRACH and a PUSCH, PRACH time-frequency resources occupied by the PRACH are determined according to resource configuration information of the PRACH, and PUSCH time-frequency resources occupied by the PUSCH are determined according to resource configuration information of the PUSCH.

Therefore, in the embodiment of the application, the terminal device may determine the position of the sub-band where the PUSCH in the random access message to be sent is located according to the indication information of the sub-band where the frequency domain resource of each PUSCH time-frequency resource is located, which is carried in the random access configuration information.

In one possible design, the indication information for configuring the subband where each PUSCH time-frequency resource is located includes: the index number of the sub-band where the frequency domain starting position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or the index number of the sub-band where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or the index number of each sub-band where each PUSCH frequency domain resource is located; or a bit map, wherein each bit in the bit map corresponds to a subband, a first value of each bit indicates that the subband corresponding to the bit is a subband where each PUSCH time-frequency resource is located, and a second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.

In one possible design, the resource configuration information of the PUSCH further includes: the number of interleaving units included in the frequency domain resource of each PUSCH time-frequency resource and/or the index number of the interleaving units included in the frequency domain resource of each PUSCH time-frequency resource; one interleaving unit comprises at least one physical resource block PRB.

In one possible design, the resource configuration information of the PUSCH may further include: the method comprises the following steps of indicating a time domain resource period, an initial position of each time domain resource period, indicating the number of PUSCH time-frequency resources in each time domain resource period, indicating the time domain length of each PUSCH time-frequency resource, indicating the frequency domain initial position of the PUSCH frequency domain resource, indicating the frequency domain size of each PUSCH time-frequency resource and indicating the number of frequency division multiplexing PUSCH time-frequency resources contained in the PUSCH frequency domain resources; or, the resource configuration of the PUSCH further includes: a time domain offset indication for indicating a time domain offset of a starting position of each PUSCH time frequency resource relative to each PRACH time frequency resource; time domain offset of each PUSCH time frequency resource; time domain length of time frequency resources of PUSCH; the number of time domain PO resources associated with the starting position of the PUSCH time domain resource; the indication of the frequency domain starting position of the PUSCH frequency domain resources, the indication of the frequency domain size of each PUSCH time frequency resource, and the indication of the number of the frequency division multiplexing PUSCH time frequency resources contained in the PUSCH frequency domain resources. In one possible design, the resource configuration information of the PUSCH may further include: and demodulating reference signal DMRS configuration information, wherein the DMRS configuration information comprises at least one of DMRS ports and DMRS sequences which are used for configuring the DMRS ports and DMRS sequences available on each PUSCH time-frequency resource. And the PUSCH time-frequency resource and one DMRS port or DMRS sequence on the PUSCH time-frequency resource form a PUSCH resource unit PRU. Thus, if a preamble sequence corresponds to multiple PRUs with the same time domain starting position and the multiple PRUs are located on multiple different subbands, before sending PUSCH, the terminal device may simultaneously perform LBT on the multiple subbands where the PRUs located on the multiple different subbands are located, and if LBT of at least one subband succeeds, the terminal device may randomly select a PRU resource in the at least one subband or select one PRU resource according to a certain preset rule to send PUSCH. And further, the LBT efficiency of the terminal can be improved, and the sending efficiency of the PUSCH in the MsgA is improved.

In one possible design, one PRACH time-frequency resource is associated with at least one preamble sequence, and one of the at least one preamble sequence is associated with one or more PUSCH resource elements.

In one possible design, the sending, by the terminal device, the random access message to the network device includes: the method comprises the steps that terminal equipment determines a time domain interval of a first PRACH time frequency resource used for sending the PRACH and a first PUSCH time frequency resource associated with the first PRACH time frequency resource, wherein the first PUSCH time frequency resource is one PUSCH time frequency resource in one or more PUSCH time frequency resources associated with the first PRACH time frequency resource; if the terminal equipment determines that the time domain interval is smaller than or equal to the threshold value and the sub-band where the first PRACH time frequency resource is located is the same as the sub-band where the first PUSCH time frequency resource is located, the terminal equipment performs Listen Before Talk (LBT) on the sub-band corresponding to the first PRACH time frequency resource, and when the LBT is successfully performed, the terminal equipment sends PRACH to the network equipment on the first PRACH resource and sends PUSCH to the network equipment on the first PUSCH time frequency resource; if the terminal equipment determines that the time domain interval is larger than the threshold value, the terminal equipment executes LBT on a sub-band where the first PRACH time frequency resource is located, and when the LBT is executed successfully, the PRACH is sent on the first PRACH time frequency resource; and performing LBT on the sub-band where the one or more PUSCH time-frequency resources are located, and selecting one PUSCH time-frequency resource from the one or more PUSCH time-frequency resources contained in the sub-band where the LBT is successfully performed to transmit the PUSCH.

Therefore, in the embodiment of the present application, in an NR-U scenario, when a PRACH time-frequency resource and a PUSCH time-frequency resource are located in the same subband, and a time-domain interval between an RO resource (the PRACH resource includes at least one RO resource) and a PO resource (the PUSCH resource includes at least one PO resource) in the random access configuration information is smaller than a threshold, when initiating MsgA transmission in a 2-step RACH, a terminal device only needs to perform LBT listening once, and if LBT succeeds, the terminal can directly send a PUSCH after sending the PRACH without performing LBT listening on the PUSCH resource, thereby reducing LBT listening times of the time-frequency resource required to be used by MsgA in the 2-step RACH.

In one possible design, the random access configuration information further includes: and the first indication information is used for receiving the sub-band where the time frequency resource of the random access response message is located. This is because when the frequency domain resource of the PUSCH includes multiple subbands, and when the terminal device sends MsgA, and the frequency domain resource where the PRACH and the PUSCH are located is located in different subbands, the problem that one subband is selected to transmit on multiple subbands needs to be considered when the network device sends the response information.

In one possible design, the method further includes: and the terminal equipment monitors the sub-band indicated by the first indication information for a response message aiming at the random access message. It can also be said that the terminal device listens to the MsgB on the subband indicated by the first indication information. In some embodiments, the subband indicated by the first indication information may be a preset subband, that is, the terminal device may listen to the response message for the random access message on the preset subband.

In one possible design, the method further includes: the terminal equipment monitors a response message aiming at the random access message on a preset sub-band; the preset sub-band is the same as one sub-band or a plurality of sub-bands in the sub-band where the PUSCH time-frequency resource for sending the PUSCH is located; or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the PRACH is located.

In one possible design, a response time window of a terminal device for receiving a response message of a random access message includes multiple time periods, different time periods are not overlapped in time, and a sub-band corresponding to each time period is one sub-band or multiple sub-bands in a sub-band where a time-frequency resource for receiving the random access response message is located; the monitoring, by the terminal device, of the response message to the random access message on the subband where the time-frequency resource for receiving the random access response message is located includes: the terminal equipment monitors response messages aiming at the random access messages on a sub-band corresponding to a plurality of time periods in each time period according to the sequence of the time periods in the response time window; if the terminal device does not monitor the response message for the random access message on the sub-band corresponding to the first time period, the terminal device continues to try to monitor the response message for the random access message on the sub-band corresponding to the next time period of the first time period. Therefore, when the response message can be selected by a plurality of sub-bands, the response time window can be divided to correspond to the plurality of sub-bands, the network device can attempt to send the response message on the corresponding sub-band in the corresponding time period, and similarly, the terminal device listens to the response message on the corresponding sub-band in the corresponding time period, so that the failure of sending the response message due to the fact that a certain sub-band is occupied for a long time can be avoided, meanwhile, the terminal device listens to the response message on the plurality of sub-bands at the same time, and the complexity of detecting the response message by the terminal device and the power consumption of the terminal device are reduced.

In one possible design, the resource configuration information of the PRACH further includes indication information for configuring a subband in which the frequency domain resource of each PRACH time-frequency resource is located.

In one possible design, the indication information of the sub-band where the frequency domain resource for configuring each PRACH time-frequency resource is located includes: the index number of the sub-band where the frequency domain starting position of each PRACH time frequency resource is located and the number of the sub-bands where each PRACH time frequency resource is located; or, the index number of the sub-band where the frequency domain termination position of each PRACH time frequency resource is located and the number of the sub-bands where each PRACH time frequency resource is located; or, the index number of each sub-band where each PRACH frequency domain resource is located; or, a bit map, where each bit in the bit map corresponds to one subband, a first value of each bit indicates that the subband corresponding to the bit is one subband where each PRACH time-frequency resource is located, and a second value of each bit indicates that the subband corresponding to the bit is not the subband where the PRACH time-frequency resource is located.

In one possible design, at least one PRACH time frequency resource determined according to the resource configuration information of the PRACH and at least one PUSCH time frequency resource determined according to the resource configuration information of the PUSCH have the following relationship that one PRACH time frequency resource in the at least one PRACH time frequency resource is associated with a plurality of PUSCH time frequency resources in the at least one PUSCH time frequency resource; or each PRACH time-frequency resource in the at least one PRACH time-frequency resource is associated with one PUSCH time-frequency resource in the at least one PUSCH time-frequency resource; or, a plurality of PRACH time-frequency resources of the at least one PRACH time-frequency resource are associated with one PUSCH time-frequency resource of the at least one PUSCH time-frequency resource.

In a second aspect, a random access method is provided, including: the network equipment sends random access configuration information to the terminal equipment, wherein the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located; the network equipment determines PRACH time-frequency resources and PUSCH time-frequency resources according to the PRACH resource configuration information and the PUSCH resource configuration information; and the network equipment receives the PRACH on the PRACH time frequency resource and receives the PUSCH on the PUSCH time frequency resource. The beneficial effects of the second aspect can be seen from the first aspect, and are not described in detail herein.

In one possible design, the indication information for configuring the subband where each PUSCH time-frequency resource is located includes: the index number of the sub-band where the frequency domain starting position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or the index number of the sub-band where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or the index number of each sub-band where each PUSCH frequency domain resource is located; or, a bit map, where each bit in the bit map corresponds to one subband, a first value of each bit indicates that the subband corresponding to the bit is one subband where each PUSCH time-frequency resource is located, and a second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.

In one possible design, the random access configuration information further includes: the network device is used for sending first indication information of a sub-band where the time frequency resource of the random access response message is located.

In one possible design, the method further includes: the network equipment transmits a response message aiming at the random access message on the sub-band indicated by the first indication information.

In one possible design, the method further includes: the network equipment sends a response message aiming at the random received message on a preset sub-band; the preset sub-band is the same as one sub-band or a plurality of sub-bands in the sub-band where the PUSCH time-frequency resource for sending the PUSCH is located; or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the PRACH is located.

In one possible design, a response time window of a response message sent by a network device includes multiple time segments, different time segments are not overlapped in time, and a sub-band corresponding to each time segment is one or more sub-bands in a sub-band where a time-frequency resource for receiving the random access response message is located; the network equipment sends the response message aiming at the random receiving message on the sub-band where the time frequency resource used for receiving the random access response message is positioned, and the response message comprises the following steps: according to the sequence of a plurality of time periods in a response time window, in each time period, the network equipment executes LBT on a sub-band corresponding to the time period so as to send a response message aiming at the random access message on the sub-band which succeeds in executing the LBT; if the network device fails to perform the LBT on the sub-band corresponding to the first time period, the network device continues to attempt to perform the LBT on the sub-band corresponding to the next time period of the first time period, so as to transmit a response message for the random access message on the sub-band on which the LBT was successfully performed.

In a third aspect, a terminal device is provided, which includes: the network equipment comprises a receiving module and a processing module, wherein the receiving module is used for receiving random access configuration information sent by network equipment, and the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located; and the sending module is used for sending a random access message to the network equipment, wherein the random access message comprises at least one of a PRACH and a PUSCH, the PRACH time-frequency resource occupied by the PRACH is determined according to the resource configuration information of the PRACH, and the PUSCH time-frequency resource occupied by the PUSCH is determined according to the resource configuration information of the PUSCH.

In one possible design, the indication information for configuring the subband where each PUSCH time-frequency resource is located includes: the index number of the sub-band where the frequency domain starting position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or the index number of the sub-band where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or, the index number of each sub-band where each PUSCH frequency domain resource is located; or, a bit map, where each bit in the bit map corresponds to one subband, a first value of each bit indicates that the subband corresponding to the bit is one subband where each PUSCH time-frequency resource is located, and a second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.

In one possible design, the apparatus further includes a processing module, configured to determine a time interval between a first PRACH time-frequency resource used for transmitting the PRACH and a first PUSCH time-frequency resource associated with the first PRACH time-frequency resource, where the first PUSCH time-frequency resource is one of one or more PUSCH time-frequency resources associated with the first PRACH time-frequency resource; a sending module, configured to, if it is determined that the time domain interval is smaller than or equal to the threshold value and the subband where the first PRACH time-frequency resource is located is the same as the subband where the first PUSCH time-frequency resource is located, perform listen-before-talk (LBT) on the subband corresponding to the first PRACH time-frequency resource, send, to the network device, the PRACH on the first PRACH resource when the LBT is successfully performed, and send, to the network device, the PUSCH on the first PUSCH time-frequency resource; if the time domain interval is larger than the threshold value, performing LBT on a sub-band where the first PRACH time frequency resource is located, and when the LBT is successfully performed, sending the PRACH on the first PRACH time frequency resource; and performing LBT on the sub-band where the one or more PUSCH time-frequency resources are located, and transmitting the PUSCH on the PUSCH time-frequency resource on the sub-band where the LBT is successfully performed.

In one possible design, the random access configuration information further includes: and the first indication information is used for receiving the sub-band where the time frequency resource of the random access response message is located.

In one possible design, the receiving module is further configured to: and monitoring a response message for the random access message on the sub-band indicated by the first indication information.

In one possible design, the receiving module is further configured to: monitoring a response message aiming at the random access message on a preset sub-band; the preset sub-band is the same as one sub-band or a plurality of sub-bands in the sub-band where the PUSCH time-frequency resource for sending the PUSCH is located; or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the PRACH is located.

In one possible design, the response time window for receiving the response message of the random access message includes a plurality of time segments, different time segments are not overlapped in time, and a sub-band corresponding to each time segment is one sub-band or a plurality of sub-bands in the sub-band where the time frequency resource for receiving the random access response message is located; the receiving module is used for: monitoring a response message aiming at the random access message on a subband corresponding to a time period in each time period according to the sequence of the time periods in the response time window; if the response message aiming at the random access message is not monitored on the sub-band corresponding to the first time period, the monitoring of the response message aiming at the random access message is continuously attempted on the sub-band corresponding to the next time period of the first time period.

In a fourth aspect, a network device is provided, comprising: the terminal equipment comprises a sending module and a receiving module, wherein the sending module is used for sending random access configuration information to the terminal equipment, the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located; the processing module is used for determining the PRACH time-frequency resource and the PUSCH time-frequency resource according to the PRACH resource configuration information and the PUSCH resource configuration information; and the receiving module is used for receiving the PRACH on the PRACH time frequency resource and receiving the PUSCH on the PUSCH time frequency resource.

In one possible design, the sending module is further configured to: and sending a response message for the random access message on the sub-band indicated by the first indication information.

In one possible design, the sending module is further configured to: sending a response message aiming at the random receiving message on a preset sub-band; the preset sub-band is the same as one sub-band or a plurality of sub-bands in the sub-band where the PUSCH time-frequency resource for sending the PUSCH is located; or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the PRACH is located.

In one possible design, the response time window of the response message for sending the random access message includes a plurality of time segments, different time segments are not overlapped in time, and a sub-band corresponding to each time segment is one sub-band or a plurality of sub-bands in a sub-band where a time-frequency resource for receiving the random access response message is located; the sending module is used for: according to the sequence of a plurality of time periods in the response time window, in each time period, performing LBT on a sub-band corresponding to the time period so as to send a response message aiming at the random access message on the sub-band which succeeds in performing LBT; if the LBT on the sub-band corresponding to the first time period fails, the LBT continues to be tried on the sub-band corresponding to the next time period of the first time period, so that a response message aiming at the random access message is sent on the sub-band on which the LBT succeeds.

In a fifth aspect, the present application provides a computer storage medium for storing computer software instructions for the terminal device and/or the network device, which contains programs designed for executing the above aspects.

In a sixth aspect, the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

Drawings

FIG. 1 is a schematic diagram of a 2-step RACH procedure;

FIG. 2 is a diagram illustrating a 4-step RACH procedure;

fig. 2A is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a random access method according to an embodiment of the present application;

fig. 6 is a schematic diagram of interleaving mapping in resource mapping under NR-U according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart of a process in which a terminal device sends a random access message to a network device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a resource allocation manner of a PUSCH according to an embodiment of the present application;

fig. 9 is a schematic diagram of a resource allocation manner of a PUSCH according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a PRU under NR-U according to an embodiment of the present application;

fig. 11 is a schematic diagram of a PUSCH resource and a PUSCH resource configuration relationship provided in an embodiment of the present application;

fig. 12 is a schematic diagram of a PUSCH resource and a PUSCH resource configuration relationship provided in an embodiment of the present application;

fig. 13 is a schematic diagram of a PUSCH resource and a PUSCH resource configuration relationship provided in an embodiment of the present application;

fig. 14 is a schematic diagram of a sub-band in which a random access response message is located according to an embodiment of the present application;

fig. 15 is a schematic process diagram of a network device sending a random access response message according to an embodiment of the present application;

fig. 16 is a schematic process diagram of a network device sending a random access response message according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 22 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

For ease of understanding, some of the concepts related to the present application are illustratively presented for reference. As follows:

PRACH: the physical random access channel is used for carrying a preamble sequence sent to the network device before the terminal device starts to initiate data transmission. For example, the terminal device may send a preamble sequence on the PRACH according to the information indicated by the network device, so as to be used for the network device to identify the random access request and adjust and measure the uplink synchronization. In the embodiment of the present application, the PRACH is sent, the preamble sequence is sent, or the preamble is sent with the same meaning, that is, the terminal device sends the preamble sequence for random access on the predetermined PRACH resource.

PUSCH: and the physical uplink shared channel is used for bearing uplink service data. In the random access process, the terminal device may send a Radio Resource Control (RRC) connection request message on a PUSCH according to information indicated by the network device, so as to request the network to establish an RRC connection. In the embodiment of the present application, the PUSCH is transmitted, and the uplink data transmission is expressed in the same meaning, that is, the terminal device transmits uplink data for random access on a predetermined PUSCH resource, and the uplink data may include RRC information such as a request for establishing a random access connection. The uplink data carried by the PUSCH resource has a corresponding relation with the preamble sequence carried by the PRACH resource.

Flow of 4-step random access channel (4-step RACH): as shown in fig. 2, including 4 steps, 1) the terminal device sends a message 1(message 1, Msg1) to the network device, where Msg1 carries a preamble sequence for random access, and specifically, the terminal device may randomly select a preamble, which may also be referred to as a random access preamble sequence (random access preamble), and send the preamble sequence on the PRACH; 2) the network device sends a Random Access Response (RAR) message, which may also be referred to as message 2 (Msg 2), to the terminal device. That is, after detecting that preamble is sent, the base station sends an RAR message in a downlink, where the RAR message at least includes the following information: a number of a preamble, timing adjustment information, uplink resource position indication information allocated to the terminal device, and a temporarily allocated cell radio network temporary identifier (TC-RNTI) and the like, which are received by the base station; 3) the terminal device sends a PUSCH, which may also be referred to as message 3 (Msg 3), to the network device, that is, after receiving the RAR message, the terminal device sends an uplink message on the allocated uplink resource according to an indication in the RAR message; 4) when the terminal device receives Msg4 and the received Contention Resolution Identity (CRID) of the CRM matches the identity information transmitted by the terminal device, it may think that the terminal device has successful random access.

2-step RACH: as shown in fig. 1, MsgA sent by the terminal device includes Msg1 and Msg3 in 4-step RACH, i.e. the terminal device sends preamble and PUSCH in MsgA. The MsgB sent by the network device to the terminal device includes the contents of Msg2 and Msg4 in the 4-step RACH, i.e., the network device sends at least one of response information for a preamble sequence and uplink data in the MsgB.

LBT: in the 5G NR-U scenario, in order to improve the spectrum utilization rate and reduce collisions between different networks, devices (including network devices and terminal devices) in the NR-U scenario need to perform LBT before sending data. Devices in the NR-U scenario are classified into Frame based devices (FBEs) and load based devices (LBEs). FBE devices refer to devices that have periodic timing when transmitting or receiving, which is a fixed frame period. An LBE device refers to a device that does not have a fixed time of day at the time of transmission and reception, but rather initiates data transmission based on data requirements. For the LBE device, in order to reduce collisions during data transmission between different devices, the LBE device may perform different levels of LBT sensing according to different data types.

Sub-band: in the NR-U scenario, a frequency domain unit of data transmission is at least one sub-band (sub-band), for example, a bandwidth of one sub-band is 20MHz, and therefore, a frequency domain unit for LBT listening by a terminal device or a network device is also at least one sub-band before transmitting data. Currently, standard discussions of NR-U are still in progress, and the minimum unit of sub-bands for PRACH may also be other bandwidth values, such as 10 MHz. If the starting positions of the multiple transmission resources in the time domain are the same and the multiple transmission resources belong to the same subband, the terminal device or the network device may perform LBT only once, and if LBT succeeds, the terminal device or the network device may randomly select one of the multiple transmission resources to perform data transmission, or select one of the multiple transmission resources to perform data transmission according to a preset rule. If the starting positions of the multiple transmission resources in the time domain are the same and the multiple transmission resources belong to multiple subbands, the terminal device or the network device may perform LBT listening on the multiple subbands occupied by the multiple transmission resources at the same time, and if LBT of at least one subband is successful, the terminal device or the network device may randomly select at least one transmission resource in the at least one subband or select one transmission resource in the multiple transmission resources according to a preset rule to perform data transmission.

Resource allocation of PRACH in 4-step RACH process under NR scene: the resource configuration of the PRACH includes configuration of time domain resources and frequency domain resources. When the network device configures the time domain resource of the PRACH time frequency resource, the network device may configure, for example, a parameter PRACH configuration index (configuration index). And the terminal equipment can determine the time domain resource of the PRACH time frequency resource according to the parameter PRACH configuration index and the first table. For example: if the PRACH configuration index is 87, the PRACH configuration index is transmitted in subframe #4 (subframe # 4) and subframe #9 (subframe # 9) of all radio frames satisfying the frame number mod16 ═ 0, starting from symbol #0 (OFDM symbol with sequence number 0), there is only one PRACH slot in one subframe, each PRACH slot has 6 consecutive PRACH time-frequency resources, and each PRACH time-frequency resource occupies 2 symbols. It should be noted that, table one only shows configuration information of a part of PRACH time domain resources.

Watch 1

Wherein the content of the first and second substances,

the number of time-domain consecutive PRACH time-frequency resources in one PRACH slot,

the number of symbols occupied by each PRACH time frequency resource.

When the network device configures the frequency domain resource of the PRACH time frequency resource, the network device may configure the frequency domain size and the frequency domain starting position of the PRACH time frequency resource, and how many PRACH time frequency resources with consecutive frequency domains are available on each PRACH time domain opportunity. Specifically, the network device may configure, for example, a parameter Msg1-frequency start for indicating a frequency domain start position of the PRACH time-frequency resource. The network side may also configure parameters such as: frequency division multiplexing of message 1 (Msg1-Frequency-division multiplexing, Msg1-FDM) to indicate how many Frequency domain contiguous PRACH time-Frequency resources are Frequency division multiplexed per PRACH time-domain opportunity. The network device may also configure parameters such as: sub-carrier Spacing of message 1 (Msg1-Subcarrier Spacing), sub-carrier Spacing (Δ f) to indicate PRACH time-frequency resource^RA). Specifically, the terminal device may determine the preamble format (preamble formats) according to the parameter PRACH Configuration Index and the first lookup table. The length (L) of the preamble can then be determined from the preamble format, the look-up table two or the look-up table three_RA). Finally, the lookup table can determine the frequency domain size of the PRACH time-frequency resource (i.e. the number of RBs occupied by the PRACH time-frequency resource) according to the length of the preamble, the subcarrier spacing of the PRACH time-frequency resource and the subcarrier spacing of the PUSCH time-frequency resource

)。

Watch two

Watch III

Watch four

Resource allocation of PRACH and resource allocation of PUSCH in 2-step RACH process under NR scene:

resource allocation of the PRACH: the configuration method of the PRACH of the 2-step RACH may have two kinds, one is independent configuration, that is, the terminal device may know the PRACH time domain configuration table of the 2-step RACH in advance, the RPACH time domain configuration table of the 2-step RACH is not clear in the protocol yet at present, the RPACH time domain configuration table of the 2-step RACH may be redefined by the network device, or may follow the configuration table of the PRACH in the 4-step RACH in the NR at present. When the network device configures the PRACH resource for the terminal, one or more of a time domain resource configuration index, a frequency domain resource starting position, the number of frequency division multiplexed PRACH resources, and a PRACH subcarrier interval may be separately configured, where the time domain resource configuration index is a configuration index in a PRACH time domain configuration table of a 2-step RACH known to the terminal device. Another method is shared configuration, that is, PRACH time-frequency resources configured in 2-step RACH may be the same as time-frequency resources of PRACH of 4-step RACH, but preamble sequences of 2-step RACH are different from preamble sequences of 4-step RACH, that is, the network device does not configure PRACH time-frequency resources for 2-step RACH alone, but configures preamble sequence configuration information for 2-step RACH, for indicating which ones of the preamble sequences used in PRACH time-frequency resources of each 4-step RACH are for 2-step RACH.

Resource allocation of PUSCH: there are two methods for configuring the PUSCH time-frequency resources of the 2-step RACH in the NR system. The first is to configure PUSCH time-frequency resources independently, for example, indicate a starting slot of each period by configuring a time-domain period and a time-domain offset with respect to SNF of 0, indicate a starting symbol of each period in the starting slot by configuring the starting symbol, indicate a time-domain length of each PUSCH time-frequency resource by configuring the time-domain length, indicate a number of time-domain PUSCH time-frequency resources in each period by configuring a number of time-domain PUSCH time-frequency resources, indicate a starting position of PUSCH frequency-domain resources by configuring a frequency-domain starting position, indicate a frequency-domain length of each PUSCH time-frequency resource by configuring the frequency-domain length, and indicate a number of frequency-division multiplexed PUSCHs on each time-domain PUSCH resource by configuring a number of frequency-division multiplexed PUSCHs. The second method is to configure the relative position relative to the PRACH time-frequency resources, for example, to indicate the time-domain starting position of the PUSCH time-frequency resources by configuring the time-domain offset with the PRACH time-frequency resources, to indicate the time-domain length of each PUSCH time-frequency resource by configuring the time-domain length, to indicate the number of the time-domain PUSCH time-frequency resources associated with the time-domain starting position of each PUSCH time-frequency resources by configuring the number of the time-domain PUSCH time-frequency resources, for example, to indicate the time-domain starting position of the PUSCH time-frequency domain by configuring the frequency-domain offset with the PRACH time-frequency resources, to indicate the frequency-domain length of each PUSCH time-frequency resources by configuring the frequency-domain length, and to indicate the number of the frequency-division multiplexed PUSCHs on each time-domain PUSCH resources by configuring the number of the frequency-division multiplexed PUSCHs. The resource configuration information of the PUSCH further comprises demodulation reference signal (DMRS) configuration information, and the DMRS configuration information comprises at least one of DMRS ports and DMRS sequences which are used for configuring the time-frequency resource of each PUSCH and are available. The PUSCH time-frequency resource and one DMRS port or DMRS sequence on the PUSCH time-frequency resource constitute one PUSCH Resource Unit (PRU).

In the NR system, a mapping relationship exists between a preamble sequence of two-step random access and a PUSCH resource unit PRU, the mapping relationship between the preamble sequence and the PRU may be 1 to 1, or 1 to many, or multiple to 1, and a specific mapping relationship may be that a network device is configured explicitly or implicitly, or may be predefined by a protocol.

The embodiment of the application is mainly applied to the random access process under the 5G NR-U scene, and particularly can be applied to the scene that PRACH time-frequency resources and PUSCH time-frequency resources possibly span a plurality of sub-bands in the 2-step RACH process.

As shown in fig. 2A, the network architecture of the embodiment of the present application may include a network device 100 and a terminal device 200.

Network device 100 may be a device capable of communicating with a terminal device. For example, the network device 100 may be a base station, which may be a relay station or an access point, etc. The base station may be a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or may be an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or may be an eNB or enodeb (evolved nodeb) in LTE. The base station 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The base station 100 may also be a Network device in a 5G Network or a Network device in a Public Land Mobile Network (PLMN) Network for future evolution; but also wearable devices or vehicle-mounted devices, etc.

The terminal apparatus 200 may be a User Equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, a UE device, or the like. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal in a 5G network or a terminal in a future evolved PLMN network, etc.

In one example, network device 100 may be implemented by a structure as shown in FIG. 3. Fig. 3 shows a general hardware architecture of a base station. The base station shown in fig. 3 may include an indoor Base Band Unit (BBU) and a Remote Radio Unit (RRU), where the RRU is connected to an antenna feed system (i.e., an antenna), and the BBU and the RRU may be detached for use as needed. It should be noted that, in the specific implementation process, the base station 100 may also adopt other general hardware architectures, and is not limited to the general hardware architecture shown in fig. 3.

In one example, the terminal device 200 may be implemented by a structure as shown in fig. 4. Taking the terminal device 200 as a mobile phone as an example, fig. 4 shows a general hardware architecture of the mobile phone for explanation. The handset shown in fig. 4 may include: radio Frequency (RF) circuitry 110, memory 120, other input devices 130, a display screen 140, sensors 150, audio circuitry 160, an I/O subsystem 170, a processor 180, and a power supply 190. Those skilled in the art will appreciate that the configuration of the handset shown in fig. 4 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, some components may be separated, or a different arrangement of components may be used. Those skilled in the art will appreciate that the display screen 140 belongs to a User Interface (UI), and the display screen 140 may include a display panel 141 and a touch panel 142. And the handset may include more or fewer components than shown. Although not shown, the mobile phone may further include a camera, a bluetooth module, and other functional modules or devices, which are not described herein again.

Further, processor 180 is coupled to RF circuitry 110, memory 120, audio circuitry 160, I/O subsystem 170, and power supply 190, respectively. The I/O subsystem 170 is coupled to the other input devices 130, the display screen 140, and the sensors 150, respectively. The RF circuit 110 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 180. The memory 120 may be used to store software programs and modules. The processor 180 executes various functional applications and data processing of the cellular phone by executing software programs and modules stored in the memory 120. Other input devices 130 may be used to receive entered numeric or character information and generate key signal inputs relating to user settings and function controls of the handset. The display screen 140 may be used to display information input by or provided to the user and various menus of the handset, and may also accept user input. The sensor 150 may be a light sensor, a motion sensor, or other sensor. Audio circuitry 160 may provide an audio interface between the user and the handset. The I/O subsystem 170 is used to control input and output peripherals, which may include other device input controllers, sensor controllers, and display controllers. The processor 180 is a control center of the mobile phone 200, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile phone 200 and processes data by operating or executing software programs and/or modules stored in the memory 120 and calling data stored in the memory 120, thereby performing overall monitoring of the mobile phone. A power supply 190 (e.g., a battery) is used to supply power to the above components, and preferably, the power supply may be logically connected to the processor 180 via a power management system, so that functions of managing charging, discharging, and power consumption are implemented via the power management system.

In this embodiment, the RF circuit 110 may be configured to receive random access configuration information sent by a network device, where the configuration information includes resource configuration information; and may also be used to send random access messages to the network device. The random access message may be MsgA as described above.

In the embodiment of the present application, the memory 120 may be used to store the resource configuration information.

The methods in the following embodiments may be implemented in the network device 100 and the terminal device 200 having the above-described hardware configurations. In the following embodiments, the method in the embodiments of the present application is described by taking the above network device and terminal device as examples.

By applying the network architecture, the embodiment provided by the application mainly aims at resource configuration of the MsgA PRACH and the MsgA PUSCH in the 2-step RACH process. This is because, in the NR-U scenario, the standard discussion of random access is currently mainly focused on the 4-step RACH procedure. In the 4-step RACH procedure, the Msg3PUSCH transmission bandwidth support contains multiple subbands. At present, the resource configuration and mapping relation of the MsgA PRACH and the MsgA PUSCH in the 2-step RACH process under the NR scene is discussed, and no clear conclusion is made. For the 2-step RACH process, the transmission of the PUSCH under an NR-U scene supports the combined use of a plurality of sub-bands, and when the network equipment sends configuration information to the terminal equipment under the NR-U scene, the frequency domain configuration of the PUSCH needs to contain the sub-band configuration information where the PUSCH is located. Meanwhile, in the random access process, when the subbands where the MsgA PRACH and the MsgA PUSCH are located are different, the network device also needs to consider the position of the subband where the response message is located when sending the response message to the terminal device, and if the terminal device does not know the position of the subband where the response message is located, the terminal device needs to monitor the response message for different subbands simultaneously, which may increase energy loss of the terminal device.

In order to solve the above problem, the present application provides a random access method, where when a network device sends configuration information of a 2-step RACH to a terminal device, the configuration information includes resource configuration information of the PRACH and resource configuration information of the PUSCH, and the resource configuration information of the PUSCH further includes indication information of a subband where a frequency domain resource of the PUSCH is located; and when the frequency domain resources of the MsgA PRACH and the MsgA PUSCH sent by the terminal equipment belong to different subbands, the network equipment sends a response message to the terminal equipment, the subband in which the response message is positioned can be the same as the subband in which the PUSCH is positioned or the subband in which the PRACH is positioned, or the subband in which the response message is positioned is notified to the terminal equipment by the network equipment in advance.

The examples of the present application are further illustrated below.

An embodiment of the present application provides a random access method, as shown in fig. 5, including:

501. the network equipment sends random access configuration information to the terminal equipment, wherein the random access configuration information comprises resource configuration information of a PRACH and resource configuration information of a PUSCH, and the resource configuration information of the PUSCH comprises indication information used for configuring a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located.

Accordingly, for the network device, the network device sends the random access configuration information to the terminal device.

The random access configuration information may be included in a system message that is periodically broadcast by the network device.

The indication information for configuring the sub-band where each PUSCH time-frequency resource is located may include:

the index number of the sub-band where the frequency domain starting position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or

The index number of the sub-band where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of the sub-bands where each PUSCH time-frequency resource is located; or

And index numbers of sub-bands where each PUSCH frequency domain resource is located.

The index number of the subband may be 0, 1, 2, 3 … …, for example, when the index number of the subband where the frequency domain starting position is located is 1, and the number of the subbands is 2, the subband where each PUSCH time-frequency resource is located may be understood as 2 subbands counted from the subband with index number 3, including subband 1 and subband 2; or when the index of the subband where the frequency domain termination position is located is 2 and the number of the subbands is 2, the subband where each PUSCH time-frequency resource is located may be understood as 2 subbands counted from the subband with the index of 2, including subband 2 and subband 1. If the sub-band indication information is the index number of each sub-band where each PUSCH frequency domain resource is located, for example, the index numbers are 0 and 1, the sub-bands allocated to each PUSCH frequency domain resource are sub-band 0 and sub-band 1.

Or, the indication information for configuring the sub-band where each PUSCH time-frequency resource is located may include:

and the bit map, wherein each bit in the bit map corresponds to a sub-band, the first value of each bit indicates that the sub-band corresponding to the bit is a sub-band where each PUSCH time-frequency resource is located, and the second value of each bit indicates that the sub-band corresponding to the bit is not the sub-band where the PUSCH time-frequency resource is located. For example. The first value may be 1, the second value may be 0, and when there are 5 subbands corresponding to 5 bits, if the value of a bit in the bitmap is 00101, the corresponding subband index number is subband 0, and subband 1 … is subband 4. According to the sequence of the sub-bands in the frequency domain, the 3 rd sub-band (sub-band 2) and the 5 th sub-band (sub-band 4) are sub-bands where the PUSCH time-frequency resources are located, and the 1 st sub-band (sub-band 0), the 2 nd sub-band (sub-band 1) and the 4 th sub-band (sub-band 3) are not sub-bands where the PUSCH time-frequency resources are located.

In this embodiment of the present application, the resource configuration information of the PUSCH may further include: the number of interleaving units (interlaces) included in the frequency domain resource of each PUSCH time frequency resource and/or the index number of the interleaving units included in the frequency domain resource of each PUSCH time frequency resource, that is, the time frequency resources corresponding to n interleaving units are time frequency resources of 1 PUSCH, and n is greater than or equal to 1; one interleaving unit includes at least one Physical Resource Block (PRB).

Specifically, when data carried on the PUSCH under NR-U is mapped on frequency domain resources, a PRB-based interlace mapping (PRB-based interlace mapping) mode is supported. For example, with support under NR-U at 20MHz bandwidth, the following two interleaving designs may be applied to PUSCH:

1) subcarrier spacing 15 KHz: the interleaving unit number M is 10, and each interleaving unit has 10 or 11 PRBs;

2) the subcarrier spacing is 30 KHz: the interleaving unit number M is 5, and each interleaving unit has 10 or 11 PRBs;

taking resource mapping of PUSCH under NR-U as an example, fig. 6 is a schematic diagram of interleaving mapping during resource mapping under NR-U. In fig. 6, 3 subbands, subband 0, subband 1, and subband 2 are shown, and interleaving units with indices of 0 and 1 are also shown, PRBs in interleaving unit 1 are mapped in subband 0, subband 1, and subband 2, and PRBs in interleaving unit 1 are also mapped in subband 0, subband 1, and subband 2.

The frequency domain resource of the PUSCH time frequency resource may include the number of interleaving units and the configuration form of the index numbers of the interleaving units, which may be as follows:

1) configuring specific numerical value indication, for example, using X bits to represent the number of interleaving units of the PUSCH time-frequency resource, and using Y bits to represent the index number of the interleaving units;

2) the bitmap indicates, for example, that all interleaving units of the PUSCH time-frequency resource are represented by Z bits, a default value may be set to 0, and if any interleaving unit is configured to the terminal device, the value of the bit corresponding to the interleaving unit of the PUSCH time-frequency resource may be set to 1.

502. And the terminal equipment receives the random access configuration information sent by the network equipment.

503. The terminal equipment sends a random access message to the network equipment, wherein the random access message comprises at least one of a PRACH and a PUSCH, PRACH time-frequency resources occupied by the PRACH are determined according to resource configuration information of the PRACH, and PUSCH time-frequency resources occupied by the PUSCH are determined according to resource configuration information of the PUSCH.

Correspondingly, for the network device, the network device may determine time-frequency resources of the random access message according to the PRACH resource configuration information and the PUSCH resource configuration information, including the PRACH time-frequency resources and the PUSCH time-frequency resources; and the network equipment receives the PRACH on the PRACH time frequency resource and receives the PUSCH on the PUSCH time frequency resource.

The random access message may be understood as MsgA in fig. 1, the PRACH time-frequency resource is a time-frequency resource of a PRACH where a preamble in MsgA is located, and the PUSCH time-frequency resource is a time-frequency resource of a PUSCH where uplink data in MsgA is located.

Through the above description, in the embodiment of the present application, the terminal device may determine, according to the indication information of the sub-band where the frequency domain resource of each PUSCH time-frequency resource is located, which is carried in the random access configuration information, the sub-band position where the PUSCH in the random access message to be sent is located. Thus, if a preamble sequence corresponds to multiple PRUs with the same time domain starting position and the multiple PRUs are located on multiple different subbands, before sending PUSCH, the terminal device may simultaneously perform LBT on the multiple subbands where the PRUs located on the multiple different subbands are located, and if LBT of at least one subband succeeds, the terminal device may randomly select a PRU resource in the at least one subband or select one PRU resource according to a certain preset rule to send PUSCH. And further, the LBT efficiency of the terminal can be improved, and the sending efficiency of the PUSCH in the MsgA is improved.

In addition, as can be known from the above description, in an NR-U scenario, during a 2-step RACH process, PRACH and PUSCH in MsgA transmit preamble and uplink data, respectively, and before preamble and uplink data are sent, the terminal device needs to execute an LBT mechanism. In this embodiment of the present application, in order to reduce the number of times of LBT listening when the terminal device sends MsgA, a time interval of a PRACH transmission opportunity (RO) resource corresponding to a preamble and a time interval of a PUSCH transmission opportunity (PO) resource corresponding to uplink data in a time domain are different, and the terminal device needs to execute different LBT mechanisms.

504. And the network equipment determines the PRACH time-frequency resource and the PUSCH time-frequency resource according to the PRACH resource configuration information and the PUSCH resource configuration information.

505. And the network equipment receives the PRACH on the PRACH time frequency resource and receives the PUSCH on the PUSCH time frequency resource.

Therefore, in this embodiment of the application, in step 503, as shown in fig. 7, the sending, by the terminal device, the random access message to the network device may include steps 5031 to 5034:

5031. the terminal equipment determines a first PRACH time frequency resource used for sending a preamble sequence preamble and a time interval of a first PUSCH time frequency resource (PO resource) associated with the first PRACH time frequency resource (RO resource), wherein the first PUSCH time frequency resource is one PUSCH resource in one or more PUSCH time frequency resources associated with the first PRACH time frequency resource. Step 5032 or step 5033 is then performed.

In some embodiments, the PRACH time-frequency resources may be understood as the above-mentioned RO resources, and the PUSCH time-frequency resources may be understood as the above-mentioned PO resources. The first PRACH time-frequency resource may correspond to at least one RO resource, and the first PUSCH time-frequency resource may correspond to at least one PO resource. One PO resource may be one PO resource of one or more PO resources associated with one RO resource. In other words, one RO resource may map one or more PO resources.

That is, before sending MsgA, the terminal device needs to determine the time interval between the RO resource used for sending PRACH and the PO resource associated with the RO resource.

5032. If the terminal equipment determines that the time domain interval is smaller than or equal to the threshold value, and the sub-band where the first PRACH time frequency resource is located is the same as the sub-band where the first PUSCH time frequency resource is located, the terminal equipment performs listen before talk LBT on the sub-band corresponding to the first PRACH time frequency resource, and when the LBT is successfully performed, the terminal equipment sends PRACH to the network equipment on the first PRACH resource and sends PUSCH to the network equipment on the first PUSCH time frequency resource.

The threshold value may be, for example, 16us, or may be other values, which is not limited in this embodiment.

Since the minimum frequency domain unit of the LBT performed by the terminal device is one subband, when the time domain interval between the RO resource and the PO resource is less than or equal to 16us, the terminal device may consider that after the PRACH is sent on the RO resource, because the time domain interval is short, the subband of the RO resource sending the PRACH is temporarily not occupied yet, therefore, the subband where the PO resource configured by the network device to the terminal device is located should be the same as the subband where the RO resource is located, at this time, the terminal device may perform LBT only once before sending MsgA, and if LBT succeeds, the terminal device may send the PRACH to the network device on the RO resource and send the PUSCH to the network device on the PO resource.

5033. And if the terminal equipment determines that the time domain interval is larger than the threshold value, the terminal equipment executes LBT on the sub-band where the first PRACH time frequency resource is located, and when the LBT is executed successfully, the PRACH is sent on the first PRACH time frequency resource.

5034. The terminal equipment executes LBT on the sub-band where the one or more PUSCH time-frequency resources are located, and randomly selects one PRU resource from the one or more PUSCH time-frequency resources contained in the sub-band where the LBT is successfully executed or selects one PRU resource according to a preset rule to send the PUSCH.

If the time interval between the RO resource and the PO resource is greater than 16us, the time-frequency resource between the RO resource and the PO resource may be occupied by other LBE devices, and therefore, before sending the preamble and the PUSCH, the terminal device needs to perform LBT on the subband where the RO resource (PRACH resource) is located and the subband where the PO resource (PUSCH resource) is located, respectively. Therefore, the PO resource configured by the network device may be located in the same sub-band as the RO resource, or may be different from the PO resource, and the PO resource may span multiple sub-bands.

Illustratively, if the terminal device determines that the time domain interval is greater than 16us, the terminal device performs LBT on the sub-band where the RO resource is located, and transmits the first preamble sequence on the first RO resource when LBT is successfully performed. And then, the terminal equipment performs LBT on the sub-band where one or more PO resources corresponding to the first RO resources are located, and selects a PRU resource corresponding to the first preamble sequence on the PO resources on the successfully performed sub-band to transmit PUSCH.

Therefore, in the embodiment of the application, in an NR-U scenario, when a PRACH time-frequency resource and a PUSCH time-frequency resource are located in the same subband, and a time-domain interval between an RO resource and a PO resource in random access configuration information is smaller than a threshold, a terminal device only needs to perform LBT listening once when initiating MsgA transmission in a 2-step RACH, and if LBT succeeds, the terminal may directly send a PUSCH after sending the PRACH without performing LBT listening on the PUSCH resource, thereby reducing LBT listening times of the time-frequency resource that needs to be used by the MsgA in the 2-step RACH.

In this embodiment of the present application, as shown in fig. 8, the resource configuration information of the PUSCH in step 501 may be directly and periodically configured by the network device, and in this case, the resource configuration information of the PUSCH includes the following parameters: the time domain resource configuration of the PUSCH comprises a time domain resource period of the PUSCH, an indication of an initial symbol position of an initial time slot in each time domain resource period, an indication of a time domain length of each PUSCH time-frequency resource and an indication of the number of PUSCH time-frequency resources in the time domain resource period, wherein the time domain offset relative to the SFN (single frequency network) is 0; the configuration of the PUSCH frequency domain resource comprises indication of a frequency domain starting position, indication of the frequency domain size of each PUSCH time frequency resource, indication of sub-band information where each PUSCH time frequency resource is located and indication of the number of frequency division multiplexing PUSCH time frequency resources contained in the PUSCH frequency domain resource. The frequency domain size of each PUSCH time-frequency resource may be the number of interleaving units (interlaces) and the index number of the interleaving units of each PUSCH time-frequency resource.

Alternatively, as shown in fig. 9, the resource configuration information of the PUSCH in step 501 may be implemented by configuring a relative position with respect to the resource configuration information of the PRACH. In this case, the resource configuration information of the PUSCH includes the following parameters: the time domain resource configuration of the PUSCH comprises a time domain offset indication which is used for indicating the time domain offset of each PUSCH time frequency resource relative to each PRACH time frequency resource to determine the time domain starting position of the PUSCH time frequency resource; the time domain length of the time frequency resource of each PUSCH; indicating the number of PUSCH time-frequency resources in a time domain; the PUSCH frequency domain resource configuration comprises an indication of a frequency domain starting position, an indication of the frequency domain size of each PUSCH time frequency resource, an indication of sub-band information where each PUSCH time frequency resource is located and an indication of the number of frequency division multiplexing PUSCH time frequency resources contained in the PUSCH frequency domain resources. The frequency domain size of each PUSCH time-frequency resource may be the number of interleaving units and the index number of the interleaving units of each PUSCH time-frequency resource.

In this embodiment, the network device may further configure a demodulation reference signal (DMRS) of the PUSCH time-frequency resource, which is used to indicate at least one of a DMRS port and a DMRS sequence available on each PUSCH time-frequency resource. Therefore, the resource configuration information of the PUSCH may further include DMRS configuration information, where the DMRS configuration information includes at least one of a DMRS sequence and a DMRS port that is used to configure the DMRS sequence that is available on each PUSCH time-frequency resource. One PUSCH time-frequency resource may be divided into a plurality of PUSCH Resource Units (PRUs) by at least one of the DMRS ports and DMRS sequences, and each PRU corresponds to at least one of one DMRS port and DMRS sequence. The PUSCH resource unit may also be understood as a combination of one PUSCH time-frequency resource and one DMRS port, or a combination of one PUSCH time-frequency resource and one DMRS sequence, or a combination of one PUSCH time-frequency resource, one DMRS sequence, and one DMRS port.

As shown in fig. 10, assuming that the time-frequency resources corresponding to the n interleaving units are time-frequency resources of 1 PUSCH, the time-frequency resources of the 1 PUSCH may be divided into multiple PRUs through DMRS ports and/or DMRS sequences, for example, as shown in fig. 10, there are PRUs 0, PRUs 1, and PRUs 2 … in one PUSCH time-frequency resource, and the DMRS port numbers and/or DMRS sequences in each PRU are different.

Thus, in an NR-U scenario, when a time interval between an RO resource and a PO resource in a time domain is greater than a threshold and a frequency domain resource of a PUSCH includes multiple subbands, if a preamble configures PRU resources of the multiple subbands, a terminal device may perform LBT on the multiple subbands simultaneously, and if LBT is successfully performed, the terminal device may randomly select one PRU resource from the multiple PRU resources belonging to different subbands or select one PRU resource according to a certain preset rule to transmit the PUSCH. Therefore, when one preamble is configured with PRU resources of a plurality of sub-bands, the LBT success rate of the terminal equipment can be improved, and the transmission efficiency of the PUSCH in the MsgA is further improved.

Similar to the resource configuration information of the PUSCH, in the embodiment of the present application, the resource configuration information of the PRACH in step 501 may also include indication information for configuring a subband where the frequency domain resource of each PRACH time-frequency resource is located.

Similar to the resource configuration information of the PUSCH, the indication information for configuring the subband where the frequency domain resource of each PRACH time-frequency resource is located includes:

the index number of the sub-band where the frequency domain starting position of each PRACH time frequency resource is located and the number of the sub-bands where each PRACH time frequency resource is located; or

The index number of the sub-band where the frequency domain termination position of each PRACH time frequency resource is located and the number of the sub-bands where each PRACH time frequency resource is located; or

Index number of each sub-band where each PRACH frequency domain resource is located; or

And a bit map, wherein each bit in the bit map corresponds to a sub-band, a first value of each bit indicates that the sub-band corresponding to the bit is a sub-band in which each PRACH time-frequency resource is located, and a second value of each bit indicates that the sub-band corresponding to the bit is not a sub-band in which the PRACH time-frequency resource is located.

Similar to the resource configuration information of the PUSCH, in addition to the indication information of the sub-band where the frequency domain resource of the PRACH time-frequency resource is located, the resource configuration information of the PRACH in step 501 may further include: the PRACH time domain resource allocation index, the PRACH frequency domain resource starting position indication, the PRACH time domain resource continuous multiplexing number indication on each PRACH frequency domain resource, the PRACH time domain resource size indication, the PRACH time domain resource sub-carrier interval.

Or, the network device may also configure or not configure the PRACH time-frequency resource for the 2-step RACH separately, the terminal device follows the PRACH time-frequency resource of the 4-step RACH configured by the network device, and the network device only needs to configure a preamble for the 2-step RACH in each PRACH time-frequency resource, which is used to indicate which preamble sequences in the PRACH time-frequency resource of each 4-step RACH are used for the 2-step RACH. At this time, the resource configuration information of the PRACH may include: preamble for random access.

In this embodiment of the present application, one PRACH time-frequency resource may be associated with at least one preamble, and one preamble in the at least one preamble may be associated with one or more PUSCH resources. In other words, one RO resource may be associated with at least one preamble, and one preamble of the at least one preamble may be associated with one or more PO resources.

In combination with the above-described resource configuration information of the PRACH, resource configuration information of the PUSCH, and the time intervals of the PRACH time-frequency resource and the PUSCH time-frequency resource being different, how the terminal device transmits the PRACH and the PUSCH is further described below with respect to the time-frequency resource of the PRACH and the time-frequency resource of the PUSCH configured by the base station.

A) When the time interval between the RO resource in the PRACH time-frequency resource configured by the network device and the PO resource in the PUSCH time-frequency resource configured by the network device is smaller than or equal to the threshold value, the network device may configure the frequency domain resource in the PRACH time-frequency resource and the frequency domain resource in the PUSCH time-frequency resource in the same sub-band, which is described in two cases:

a. if the PRACH time-frequency resource configured by the network device only includes one sub-band, and the time-domain interval between the PRACH time-frequency resource used for sending the preamble and the PUSCH time-frequency resource associated with the PRACH time-frequency resource is smaller than the threshold, the network device may configure the position of the frequency-domain resource of the PUSCH time-frequency resource and the position of the frequency-domain resource of the PRACH time-frequency resource in the same sub-band, and record the PRACH time-frequency resource as the RO resource and the PUSCH time-frequency resource as the PO resource, as shown in fig. 11, the frequency-domain resource of the RO resource and the frequency-domain resource of the PO resource are both located on sub-band 1. One RO resource may include a preamble set including at least one preamble sequence (preamble), and one PO resource may include a PRU set including at least one PRU. The mapping relationship between the preamble sequence and the PRU may be: one preamble sequence corresponds to one PRU, or one preamble sequence corresponds to a plurality of PRUs, or a plurality of preamble sequences corresponds to one PRU. The mapping relationship between the preamble sequence and the PRU may be explicitly or implicitly configured by the network device, or predefined by the protocol, which is not limited in this application.

b. If the PRACH resource configured by the network device includes multiple RO resources and the RO resources span multiple subbands, if each RO resource in the PRACH resource does not span a subband, the network device may configure a PUSCH resource on the subband where each RO resource is located, that is, a time domain interval between each RO resource in the PRACH resource and a PO resource in the PUSCH resource corresponding to the RO resource is smaller than 16us, and each RO resource of the PRACH resource and the PO resource corresponding to the RO resource are in the same subband. As shown in fig. 12, assuming that the PRACH resources configured by the network device include an RO1 resource and an RO0 resource, where the sub-band location where the RO1 resource is located is sub-band 1, and the sub-band location where the RO0 is located is sub-band 0, the sub-band location of PO1 corresponding to the RO1 is also sub-band 1, and the sub-band location of PO 0 corresponding to the RO0 is also sub-band 0. The mapping relationship between the preamble sequence and the PRU can be found in the above explanation.

B) When the time interval between the RO resource in the PRACH resource configured by the network device and the PO resource in the PUSCH resource configured by the network device is greater than the threshold value, the terminal device needs to perform LBT before transmitting the PRACH and the PUSCH, and if the LBT corresponding to the PRACH and the PUSCH is successfully performed, the terminal device transmits the PRACH and the PUSCH respectively. In this scenario, in order to improve the probability of successful sending of MsgA by the terminal device, the network device may improve the LBT efficiency by configuring multiple RO resources and multiple PO resources on the frequency domain resources. In the embodiment of the present application, each RO resource of a PRACH is illustrated as an example in one subband, where a frequency domain resource in the PRACH resource and a frequency domain resource in the PUSCH resource configured by a network device may be divided into two cases:

a) the PRACH resources configured by the network device include one RO resource, where one RO resource corresponds to multiple PO resources in the PUSCH resource, and the multiple PO resources are located in different subbands, that is, each subband where the PUSCH is located includes at least one PO resource. As shown in fig. 13, as illustrated in (a) of fig. 13, the PRACH resource includes one RO0 resource, the RO0 resource is located on subband 0, the PUSCH resource includes a PO 0 resource and a PO1 resource, the PO 0 resource is located on subband 0, and the PO1 resource is located on subband 1. The mapping relationship between the preamble included in the RO resource and the PRU included in the PO resource may be one-to-one, one-to-many, many-to-one, and the mapping relationship between the preamble and the PRU may be explicitly or implicitly configured by the network device, or predefined by the protocol, which is not limited in this application.

b) The PRACH resource configured by the network device includes multiple RO resources, and the multiple RO resources may be located on different subbands, that is, each subband where the PRACH resource is located includes at least one RO resource. One RO resource may correspond to multiple PO resources in the PUSCH resource, and the multiple PO resources are located on different subbands, that is, each subband where the PUSCH resource is located includes at least one PO resource. As shown in fig. 13, as exemplified in (b) of fig. 13, the PRACH resource includes an RO0 resource and an RO1 resource, the RO0 resource is located on subband 0, the RO1 resource is located on subband 1, the PUSCH time-frequency resource includes a PO 0 resource and a PO1 resource, the PO 0 resource is located on subband 0, and the PO1 resource is located on subband 1. The RO0 resource corresponds to the PO 0 resource and the PO1 resource, and the RO1 resource corresponds to the PO 0 resource and the PO1 resource. Fig. 13 (c) shows that the PUSCH resources include a PO 0 resource, a PO1 resource, and a PO 2 resource, the PO 0 resource being located on subband 0, the PO1 resource being located on subband 1, and the PO 2 resource being located on subband 2. The RO0 resource corresponds to the PO 0 resource and the PO1 resource, and the RO1 resource corresponds to the PO1 resource and the PO 2 resource.

Under the two conditions of the above a) and B), the following relationship exists between at least one PRACH time-frequency resource determined by the terminal device according to the resource configuration information of the PRACH and at least one PUSCH time-frequency resource determined according to the resource configuration information of the PUSCH:

one PRACH time-frequency resource of the at least one PRACH time-frequency resource is associated with a plurality of PUSCH time-frequency resources of the at least one PUSCH time-frequency resource, for example, in (a) in fig. 13, (b) in fig. 13, and (c) in fig. 13, the RO0 resource is associated with a PO 0 resource and a PO1 resource; or

Each PRACH time-frequency resource of the at least one PRACH time-frequency resource is associated with one PUSCH time-frequency resource of the at least one PUSCH time-frequency resource, for example, (b) in fig. 13, an RO0 resource corresponds to a PO 0 resource, an RO0 resource also corresponds to a PO1 resource, an RO1 resource corresponds to a PO 0 resource, and an RO1 resource also corresponds to a PO1 resource; or

A plurality of PRACH time frequency resources of the at least one PRACH time frequency resource are associated with one PUSCH time frequency resource of the at least one PUSCH time frequency resource. For example, in fig. 13 (b), the RO0 resource corresponds to the PO 0 resource, and the RO1 resource also corresponds to the PO 0 resource.

The above is a description of the present application of a configuration method of PRACH resources and PUSCH resources in an NR-U scenario and a random access message.

It is also mentioned above that, when the frequency domain resource of the PUSCH includes multiple subbands, and when the terminal device sends MsgA, and the frequency domain resource where the PRACH and the PUSCH are located in different subbands, the problem that one subband is selected to be transmitted on multiple subbands needs to be considered when the network device sends the response information.

Therefore, in this embodiment of the present application, the random access configuration information may further include: and the first indication information is used for receiving the sub-band where the time frequency resource of the random access response message is located.

As shown in fig. 5, after step 505, the method may further include steps 506 and 507:

506. and the network equipment sends a response message aiming at the random access message to the terminal equipment.

In some embodiments, the information in the response message to the random access message may be one of the following three cases:

1) when the network device receives only the PRACH, or receives the RACH and the PUSCH, but the network device only detects the PRACH correctly, the network device sends response information only for the PRACH, where the response information is used to instruct the terminal device to perform transmission/retransmission of uplink data, and the response information may be referred to as a 2-step RACH RAR, or a fallback RAR (fallback RAR);

2) when the network equipment receives only the PUSCH, the network equipment transmits response information only aiming at the PUSCH, and the response information is used for instructing the terminal equipment to execute transmission/retransmission of uplink data (when the PUSCH decoding fails) or instructing the random access flow contention resolution to succeed (when the PUSCH decoding succeeds). If the response message indicates that the contention resolution of the random access procedure is successful, the response message may also carry other information, such as a timing advance command (TAcommand), a cell radio network identifier (C-RNTI or TC-RNTI) uplink scheduling grant (UL grant), an RRC command, and the like; if the response message indicates the terminal device to perform transmission/retransmission of the uplink data, the response message may carry response information including PO resource indication information, where the response information includes at least one of the following information: PO resource indication information, uplink scheduling grant (UL grant), timing advance command (TA command), temporary cell radio network identifier (TC-RNTI), and the like. The PO resource indication information may be one of a DMRS port number corresponding to the PUSCH, a DMRS sequence index corresponding to the PUSCH, an index number of a PO resource, or the like, or a PUSCH resource unit index (PRU index) corresponding to the PUSCH.

3) When the network equipment receives the PRACH and the PUSCH, demodulates the PRACH correctly and decodes the PUSCH successfully, the network equipment sends response information aiming at the PRACH and the PUSCH, and the response information indicates that the random access process is accessed randomly and the contention resolution is successful. When the response message indicates that the contention resolution of the random access procedure is successful, the response message may also carry other information, such as a TA command, a C-RNTI or a TC-RNTI, an UL grant, an RRC command, and the like.

The response information for the random access message sent by the network device to the terminal device may be carried on the PDSCH, which may be a multiplexing combination of response information of multiple terminal devices, that is, the response information sent by the network device is in a multicast (groupcast) form; the PDSCH may also be response information of a single terminal device, i.e. the response information sent by the network device is in the form of a unicast (unicast). The frequency domain resource for the network device to send the response information should be considered according to the two cases:

if the response information sent by the network device is the response information of a single terminal device, the frequency domain resource location of the response information may be the same as the frequency domain location of a PUSCH Resource Unit (PRU) used by the terminal device to send the PUSCH, that is, the preset subband may be the same as the subband where the PRU used by the terminal device to send the PUSCH is located. As shown in fig. 14. Fig. 14 illustrates that, if the terminal device selects to transmit preamble 0 on the RO0 resource of subband 0 and the PUSCH occupies PRU0 in PO 0 of subband 0, the terminal device may determine to transmit a response message for the random access message on subband 0.

If the response message sent by the network device is the response messages of a plurality of terminal devices, the network device may send the response message to the terminal device on a preset subband. The preset subband may be one of the following frequency domain resource locations:

the sub-band where the RO resource is located;

a sub-band of the plurality of sub-bands where the RO resource is located;

the sub-band where the PRU resource is located;

a sub-band of a plurality of sub-bands in which the PRU resource is located;

sub-bands configured by the network device.

That is to say, the frequency domain resource location where the network device sends the response message is known to the terminal device, that is, the frequency domain resource location where the response message is located may be the frequency domain resource location where the network device configures to the terminal device, or the frequency domain resource location where the response message is located is preset, and the terminal device and the network device know the preset frequency domain resource location.

When the network equipment sends the response information, the PDSCH bearing the response information is scheduled by the DCI borne in the PDCCH, and the frequency domain resource position of the PDCCH is the same as the frequency domain resource position of the PDSCH. 507. And the terminal equipment monitors the sub-band indicated by the first indication information for a response message aiming at the random access message.

It can also be said that the terminal device listens to the MsgB on the subband indicated by the first indication information.

In some embodiments, the subband indicated by the indication information of the subband where the time-frequency resource for receiving the random access response message is located may be a preset subband, that is, the terminal device may listen to the response message for the random access message on the preset subband.

The preset sub-band is the same as one sub-band or a plurality of sub-bands in the sub-band where the PUSCH time-frequency resource for sending the PUSCH is located;

or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the leader sequence is located.

In addition, in the random access process, after the terminal device sends MsgA, it may open a response time window (RAR window, or MsgB window) for receiving a response message, that is, MsgB, and in order to improve the random access efficiency, in the response time window, when the network device sends a response message, it listens to a time-frequency resource LBT carrying the response message, and if LBT succeeds, the network device sends the response message on the time-frequency resource carrying the response message corresponding to LBT. If LBT is unsuccessful and the response time window is not timed out, the network device may attempt to continue LBT on the time-frequency resources carrying the response information. As shown in fig. 15.

The network device may terminate the sending of the MsgB when one or more of the following conditions are met:

the MsgB is successfully sent;

the response time window opened by the terminal equipment is overtime;

the network device does not need to send response information to the terminal device.

In summary, for the sending process of the response message and the frequency domain resource position in the 2-step RACH process in the NR-U scenario, when the positions of the subbands where the PRACH and the PUSCH are located in the MsgA are different, or the PUSCH can use a plurality of subbands, the terminal device needs to know the position of the subband where the response message is located, so as to avoid that the terminal device needs to simultaneously listen to the plurality of subbands when receiving the response message, thereby reducing the complexity of the terminal device in detecting the response message and the power consumption of the terminal device.

In some embodiments, in the NR-U scenario, when the network device transmits the response message in the two-step random access procedure, if there are multiple subband selections, the network device may separate multiple time periods within the random response time window, and select one subband to attempt transmission of the random response message in each time period. Correspondingly, for the terminal device, the response time window for the terminal device to receive the response message of the random access message includes multiple time segments, different time segments are not overlapped in time, and the sub-band corresponding to each time segment may be one or more sub-bands of the sub-bands where the time-frequency resource for receiving the random access response message is located.

Taking the terminal device side as an example, first, the terminal device determines a subband range available for response message transmission, where the subband range may be a subband configured to the terminal device by the network device or a preset subband, and the predefined subband position is known by the terminal device, for example, a subband where a time frequency resource for receiving the random access response information is located may be multiple subbands where a PRACH time frequency resource for transmitting the PRACH is located, or multiple subbands where a PUSCH time frequency resource for transmitting the PUSCH is located. Then, the terminal device determines a transmission scheme of the response message.

In some embodiments, the determining, by the terminal device, the transmission scheme of the response message may include, or the terminal device listens for the response message for the random access message on the preset subband may include: and the terminal equipment monitors the response message aiming at the random access message on the sub-band corresponding to the time period in each time period according to the sequence of the time periods in the response time window. If the terminal device does not monitor the response message for the random access message on the sub-band corresponding to the first time period, the terminal device continues to try to monitor the response message for the random access message on the sub-band corresponding to the next time period of the first time period.

For example, the response time window length is X, and the starting time is t₀If the number of subbands available for transmission of the response message is N, the length of the time segment of each subband is N

0≤i≤N-1,L_iIndicating the length of the time segment of the ith sub-band, each sub-band being availableStarting at a time t_i＝t₀+i*L₀，L₀Indicating the length of the 1 st time segment.

For the network device, when the LBT of the subband corresponding to the ith time period in the response time window is successful, the network device sends a response message on the ith subband, and if the LBT of the subband corresponding to the ith time period by the network device is unsuccessful, the network device may continue to attempt to perform LBT on the (i + 1) th subband corresponding to the (i + 1) th time period when the LBT of the subband corresponding to the ith time period is unsuccessful due to multiple transmission opportunities of the response message; if the network device successfully performs the LBT on the (i + 1) th subband corresponding to the (i + 1) th time period, the network device sends a response message on the (i + 1) th subband.

Correspondingly, for the terminal device, in the response time window, in the ith time period, the terminal device listens to the response message on the ith subband, and if the terminal device does not successfully listen to the response message in the ith time period, the terminal device continues to try to listen to the response message on the (i + 1) th subband corresponding to the (i + 1) th time period.

For example, assuming that the number of subbands available for response message transmission is 3, the time period and subband configuration for which response message transmission is available may be as shown in fig. 16. Suppose that the terminal device has sent MsgA, the start time of the MsgB response time window is t₀The terminal device starts at t₀And t₁Time period L in between₀The corresponding sub-band 0 listens for the response message, if the terminal device does not listen for the response message on sub-band 0, the terminal device continues at t₁And t₂Time period L in between₁The response message is listened to on the corresponding subband 1.

In this embodiment of the present application, the subband number corresponding to each time segment may be an absolute index number of a subband, or may be an indication number of an available subband resource.

Therefore, when the response message can be selected by a plurality of sub-bands, the response time window can be divided to correspond to the plurality of sub-bands, the network device can attempt to send the response message on the corresponding sub-band in the corresponding time period, and similarly, the terminal device listens to the response message on the corresponding sub-band in the corresponding time period, so that the failure of sending the response message due to the fact that a certain sub-band is occupied for a long time can be avoided, meanwhile, the terminal device listens to the response message on the plurality of sub-bands at the same time, and the complexity of detecting the response message by the terminal device and the power consumption of the terminal device are reduced.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as a terminal device, a network device, etc., contains a hardware structure and/or software modules for performing each function in order to realize the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal device, the network device, and the like may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing each functional module by corresponding functions, fig. 17 shows a schematic diagram of a possible structure of the terminal device according to the foregoing embodiment, and the terminal device 170 includes: a receiving unit 1701, a transmitting unit 1702 and a processing unit 1703. A receiving unit 1701 is configured to support the terminal device to execute the

procedures

502 and 505 in fig. 5, a sending unit 1702 is configured to support the terminal device to execute the procedure 503 in fig. 5, the

procedures

5032, 5033 and 5034 in fig. 7, and a processing unit 1703 is configured to support the terminal device to execute the procedure 5031 in fig. 7. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 18 shows a schematic diagram of a possible structure of the terminal device according to the above-described embodiment, in the case of an integrated unit. The terminal device 180 includes: a processing module 1802, and a communication module 1803. The processing module 1302 is for controlling and managing the actions of the first unit, e.g., the processing module 1802 is for enabling the terminal device to perform the process 5031 of fig. 7, and/or other processes for the techniques described herein. The communication module 1803 is used for supporting communication between the terminal device and other network entities, for example, communication between the functional modules shown in the network device or the network entities. The communication module may include a transmitting module that functions similarly to the transmitting module 1702 and a receiving module that functions similarly to the receiving module 1701, and the terminal device may further include a storage module 1801 for storing program codes and data of the terminal device.

The Processing module 1802 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1803 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 1801 may be a memory.

When the processing module 1802 is a processor, the communication module 1803 is a transceiver, and the storage module 1801 is a memory, the terminal device according to the embodiment of the present application may be the terminal device shown in fig. 19.

Referring to fig. 19, the terminal device 1910 includes: a processor 1912, a transceiver 1913, a memory 1911, and a bus 1914. Among them, the transceiver 1913, the processor 1912, and the memory 1911 are connected to each other through a bus 1914; the bus 1914 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 19, but it is not intended that there be only one bus or one type of bus.

In the case of dividing each functional module by corresponding functions, fig. 20 shows a schematic diagram of a possible structure of the network device according to the foregoing embodiment, and the network device 2000 includes: a transmitting unit 2001, a receiving unit 2002, and a processing unit 2003. The sending unit 2001 is used to support the network device to execute the

processes

501 and 506 in fig. 5, the receiving unit 2002 is used to support the network device to execute the process 505 in fig. 5, and the processing unit 2003 is used to support the network device to execute the process 504 in fig. 5. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the case of an integrated unit, fig. 21 shows a schematic diagram of a possible structure of the network device involved in the above-described embodiment. The network device 2100 includes: a processing module 2102 and a communication module 2103. The processing module 2102 is configured to control and manage actions of the network device, for example, the processing module 2102 is configured to support the network device to perform the process 504 of fig. 5, and/or other processes for the techniques described herein. The communication module 2103 is used to support communication between the network device and other network entities, such as a function module of the terminal device or communication between network entities. The communication module 2103 includes a receiving module similar in function to the receiving unit 2002 and a transmitting module similar in function to the transmitting unit 2001. The network device may also include a storage module 2101 to store program codes and data for the network device.

The processing module 2102 may be a processor or controller, such as a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 2103 may be a transceiver, a transceiver circuit or a communication interface, etc. The storage module 2101 may be a memory.

When the processing module 2102 is a processor, the communication module 2103 is a transceiver, and the storage module 2101 is a memory, the network device according to the embodiment of the present disclosure may be the network device shown in fig. 22.

Referring to fig. 22, the network device 2210 includes: a processor 2212, a transceiver 2213, a memory 2211, and a bus 2214. Among them, the transceiver 2213, the processor 2212 and the memory 2211 are connected to each other through a bus 2214; bus 2214 may be a PCI bus or an EISA bus or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 22, but this does not indicate only one bus or one type of bus.

The embodiments of the present application further provide a computer storage medium, which is used to store computer software instructions for the terminal device and/or the network device, and which contains a program designed to execute the steps of the foregoing embodiments.

Embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the method described in the above embodiments.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of random access, the method comprising:

the method comprises the steps that terminal equipment receives random access configuration information sent by network equipment, wherein the random access configuration information comprises resource configuration information of a Physical Random Access Channel (PRACH) and resource configuration information of a Physical Uplink Shared Channel (PUSCH), and the resource configuration information of the PUSCH comprises indication information of a sub-band where a frequency domain resource of each PUSCH time-frequency resource is located;

the terminal equipment sends a random access message to the network equipment, wherein the random access message comprises at least one of a PRACH and a PUSCH, PRACH time-frequency resources occupied by the PRACH are determined according to resource configuration information of the PRACH, and PUSCH time-frequency resources occupied by the PUSCH are determined according to the resource configuration information of the PUSCH;

the sending, by the terminal device, the random access message to the network device includes:

the terminal equipment determines a time interval of a first PRACH time frequency resource used for sending the PRACH and a first PUSCH time frequency resource associated with the first PRACH time frequency resource, wherein the first PUSCH time frequency resource is one PUSCH resource in one or more PUSCH time frequency resources associated with the first PRACH time frequency resource;

if the terminal device determines that the time domain interval is smaller than or equal to a threshold value, and the sub-band where the first PRACH time-frequency resource is located is the same as the sub-band where the first PUSCH time-frequency resource is located, the terminal device performs Listen Before Talk (LBT) on the sub-band corresponding to the first PRACH time-frequency resource, and when the LBT is successfully performed, the terminal device transmits the PRACH to the network device on the first PRACH time-frequency resource and transmits a PUSCH to the network device on the first PUSCH time-frequency resource;

if the terminal equipment determines that the time domain interval is larger than the threshold value, the terminal equipment executes LBT on a sub-band where the first PRACH time frequency resource is located, and when the LBT is executed successfully, the PRACH is sent on the first PRACH time frequency resource;

and performing LBT on the sub-band where the one or more PUSCH time-frequency resources are located, and transmitting the PUSCH on the PUSCH time-frequency resource on the sub-band where the LBT is successfully performed.

2. The method of claim 1, wherein the indication information for configuring the sub-band where each PUSCH time-frequency resource is located comprises:

Index number of each sub-band where each PUSCH frequency domain resource is located; or

And a bit map, wherein each bit in the bit map corresponds to a sub-band, a first value of each bit indicates that the sub-band corresponding to the bit is a sub-band in which each PUSCH time-frequency resource is located, and a second value of each bit indicates that the sub-band corresponding to the bit is not the sub-band in which the PUSCH time-frequency resource is located.

3. The method according to claim 1 or 2, wherein the resource configuration information of the PUSCH further comprises: the number of interleaving units included in the frequency domain resource of each PUSCH time-frequency resource and/or the index number of the interleaving units included in the frequency domain resource of each PUSCH time-frequency resource; one interleaving unit comprises at least one physical resource block PRB.

4. The method of claim 1, wherein one PRACH time-frequency resource is associated with at least one preamble sequence, and wherein one of the at least one preamble sequence is associated with one or more PUSCH resource elements.

5. The method of claim 1, wherein the random access configuration information further comprises: and the first indication information is used for receiving the sub-band where the time frequency resource of the random access response message is located.

6. The method of claim 5, further comprising: and the terminal equipment monitors a response message aiming at the random access message on the sub-band indicated by the first indication information.

7. The method of claim 1, further comprising:

the terminal equipment monitors a response message aiming at the random access message on a preset sub-band;

the preset sub-band is the same as one or more sub-bands in the sub-band where the PUSCH time-frequency resource used for sending the PUSCH is located;

or the preset sub-band is the same as one or more sub-bands in the sub-band where the PRACH time frequency resource used for sending the PRACH is located.

8. The method according to claim 7, wherein the response time window for the terminal device to receive the response message of the random access message includes multiple time segments, different time segments are not overlapped in time, and a sub-band corresponding to each time segment is one or more sub-bands of the sub-bands where the time-frequency resources for receiving the random access response message are located;

the method further comprises the following steps: the terminal equipment monitors a response message aiming at the random access message on a subband where a time frequency resource for receiving the random access response message is located;

the monitoring, by the terminal device, the response message for the random access message on the subband where the time-frequency resource for receiving the random access response message is located includes:

the terminal equipment monitors a response message aiming at the random access message on a subband corresponding to a time period in each time period according to the sequence of the time periods in the response time window;

if the terminal device does not monitor the response message for the random access message on the sub-band corresponding to the first time period, the terminal device continues to try to monitor the response message for the random access message on the sub-band corresponding to the next time period of the first time period.

9. The method of claim 1, wherein the resource configuration information of the PRACH further comprises indication information of a sub-band in which a frequency domain resource for configuring each PRACH time frequency resource is located.

10. A terminal device, comprising:

a receiving module, configured to receive random access configuration information sent by a network device, where the random access configuration information includes resource configuration information of a physical random access channel PRACH and resource configuration information of a physical uplink shared channel PUSCH, and the resource configuration information of the PUSCH includes indication information of a subband where a frequency domain resource of each PUSCH time-frequency resource is located;

a sending module, configured to send a random access message to the network device, where the random access message includes at least one of a PRACH and a PUSCH, a PRACH time-frequency resource occupied by the PRACH is determined according to resource configuration information of the PRACH, and a PUSCH time-frequency resource occupied by the PUSCH is determined according to resource configuration information of the PUSCH;

the terminal device further comprises a processing module for: determining a time interval of a first PRACH time frequency resource used for transmitting the PRACH and a first PUSCH time frequency resource associated with the first PRACH time frequency resource, wherein the first PUSCH time frequency resource is one PUSCH resource in one or more PUSCH time frequency resources associated with the first PRACH time frequency resource;

the sending module is configured to send a random access message to the network device, and includes: if the time domain interval is determined to be smaller than or equal to a threshold value, and the sub-band where the first PRACH time-frequency resource is located is the same as the sub-band where the first PUSCH time-frequency resource is located, performing Listen Before Talk (LBT) on the sub-band corresponding to the first PRACH time-frequency resource, when the LBT is successfully performed, sending the PRACH to the network equipment on the first PRACH time-frequency resource, and sending a PUSCH to the network equipment on the first PUSCH time-frequency resource;

if the terminal equipment determines that the time domain interval is larger than the threshold value, performing LBT on a sub-band where the first PRACH time frequency resource is located, and when the LBT is successfully performed, sending the PRACH on the first PRACH time frequency resource;

11. The terminal device according to claim 10, wherein the indication information for configuring the sub-band where each PUSCH time-frequency resource is located includes:

12. The terminal device according to claim 10 or 11, wherein the resource configuration information of the PUSCH further comprises: the number of interleaving units included in the frequency domain resource of each PUSCH time-frequency resource and/or the index number of the interleaving units included in the frequency domain resource of each PUSCH time-frequency resource; one interleaving unit comprises at least one physical resource block PRB.

13. The terminal device of claim 10, wherein one PRACH time-frequency resource is associated with at least one preamble sequence, and wherein one of the at least one preamble sequence is associated with one or more PUSCH resource elements.

14. The terminal device of claim 10, wherein the random access configuration information further comprises: and the first indication information is used for receiving the sub-band where the time frequency resource of the random access response message is located.

15. The terminal device of claim 14, wherein the receiving module is further configured to:

and monitoring a response message aiming at the random access message on the sub-band indicated by the first indication information.

16. The terminal device of claim 10, wherein the receiving module is further configured to:

monitoring a response message aiming at the random access message on a preset sub-band;

17. The terminal device according to claim 14, wherein the response time window for receiving the response message of the random access message includes multiple time segments, different time segments are not overlapped in time, and a sub-band corresponding to each time segment is one or more sub-bands of the sub-bands where the time-frequency resource for receiving the random access response message is located;

the receiving module is used for:

monitoring a response message aiming at the random access message on a subband corresponding to a time period in each time period according to the sequence of the time periods in the response time window;

if the response message aiming at the random access message is not monitored on the sub-band corresponding to the first time period, continuing to try to monitor the response message aiming at the random access message on the sub-band corresponding to the next time period of the first time period.

18. The terminal device of claim 10, wherein the resource configuration information of the PRACH further includes indication information for configuring a subband in which the frequency domain resource of each PRACH time-frequency resource is located.

19. A computer storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the method of any of claims 1-9.