CN114071691B

CN114071691B - Random access response detection method, device, terminal and base station side equipment

Info

Publication number: CN114071691B
Application number: CN202010791021.5A
Authority: CN
Inventors: 云翔; 孙立新; 周明宇
Original assignee: Baicells Technologies Co Ltd
Current assignee: Beijing Baicai Xinzhan Technology Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2023-07-21
Anticipated expiration: 2040-08-07
Also published as: CN114071691A

Abstract

The invention provides a random access response detection method, a device, a terminal and base station side equipment, and relates to the technical field of communication. The random access response detection method comprises the steps of obtaining first configuration information and sending leading information to a base station; determining the starting time of the random access response window according to the first configuration information, and starting the random access response window when the starting time arrives; detecting a random access response within the random access response window. In the embodiment of the application, the problem of overlong time delay of the random access response is avoided by configuring the time offset, and the problem that the terminal detects the introduced random access response confusion caused by a plurality of random access responses corresponding to the random access opportunity RO transmitted by the terminal in the random access window or cannot judge the effective random access response in the detected random access responses corresponding to the RO transmitted by the terminal can be avoided by configuring the set threshold value indicating the difference value between the advance adjustment quantity TA and the estimated advance adjustment quantity TA.

Description

Random access response detection method, device, terminal and base station side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for detecting a random access response, a terminal, and a base station side device.

Background

In an actual mobile communication network, there is a certain difference between the uplink and downlink timing at the base station side and the uplink and downlink timing at the terminal side. The downlink timing of the terminal is determined by receiving a downlink synchronous signal at the base station side, and compared with the downlink timing of the base station, the downlink timing of the terminal is different by one propagation delay between the terminal and the base station. The uplink timing of the terminal is determined according to the system frame structure determined by the downlink timing of the terminal side. And the uplink signal sent by the terminal to the base station compensates an uplink Timing Advance (TA) on the basis of the uplink Timing of the terminal side so as to ensure that the time of the uplink signal sent by the terminal reaching the base station is synchronous with the uplink Timing of the base station. In a mobile communication network, an uplink timing advance adjustment amount is notified to a terminal by a base station through a random access response (Random Access Response, RAR) and an uplink timing advance command, and when the terminal is initially accessed, and a preamble sequence is randomly accessed when the terminal transmits to the base station, the base station does not have timing advance adjustment amount compensation, and detects and measures TA required by the terminal to transmit an uplink signal through the preamble sequence and notifies the TA to the terminal. The base station detects the time difference that reaches the base station according to the ascending timing of the present side and the leading sequence window of the leading sequence, the leading detection window length is not less than 2 times of the propagation delay difference between different terminals of the cell and the base station, and the leading detection window length is quantized to the maximum indication range of TA under the existing standard, for example, the maximum is 2ms under 15 KHz.

However, in a remote communication scenario such as Non-terrestrial network (Non-Terrestrial Networks, NTN), the time difference between the arrival of terminal UE devices in different areas in a cell at the base station eNB is large, which may reach several tens of ms. Therefore, when the base station detects the random access preamble signal according to the uplink timing of the base station, a longer preamble detection window is required to detect the preamble signal that the terminal in the different area arrives in the uplink.

A problem caused by the larger preamble detection window length is whether the base station is to wait for the corresponding random access response to be fed back after the preamble detection window ends. As shown in fig. 1, if the preamble detection window is waiting for ending, a larger random access response delay is introduced, and the starting point of the random access response window of the terminal needs to be modified for response. If not waiting, the base station may respond to multiple random access responses of feedback corresponding to multiple preamble sequences received on a random access opportunity (Rach) to further cause a terminal to detect multiple random access responses corresponding to the preamble sequences sent by itself in a random access response window, as shown in fig. 2, the terminal needs to determine which random access response is self, and if the determination is wrong, the terminal may cause the wrong application base station to indicate TA in the RAR, resulting in subsequent uplink transmission failure.

Disclosure of Invention

The application provides a random access response detection method, a device, a terminal and base station side equipment, which are used for solving the problem that in the related art, if waiting for the end of a preamble detection window, larger random access response time delay is introduced, and if not waiting, the base station possibly aims at multiple random access responses of feedback corresponding to a plurality of preamble sequences received on a random access opportunity RO.

In order to solve the technical problems, the invention adopts the following technical scheme:

in a first aspect, a random access response detection method is provided, applied to a terminal, and includes:

acquiring first configuration information and sending leading information to a base station;

determining the starting time of the random access response window according to the first configuration information, and starting the random access response window when the starting time arrives;

detecting a random access response within the random access response window.

In a second aspect, a random access response detection apparatus is provided, which is applied to a terminal, and includes:

the acquisition module is used for acquiring the first configuration information;

the determining module is used for determining the starting time of the random access response window according to the first configuration information and starting the random access response window when the starting time arrives;

And the detection module is used for detecting random access response in the random access response window.

In a third aspect, a random access response detection method is provided, applied to a base station, and includes:

and after receiving the preamble information of the four-step random access process or the message MsgA of the two-step random access process, feeding back the random access response corresponding to the detection preamble information in the preamble detection window.

In a fourth aspect, a random access response detection apparatus is provided, which is applied to a base station, and includes:

and the feedback module is used for feeding back the random access response corresponding to the detection preamble information in the preamble detection window after receiving the preamble information of the four-step random access process or the message MsgA of the two-step random access process.

In a fifth aspect, there is provided a terminal comprising a memory, a processor and a program stored on the memory and executable on the processor; wherein the processor implements the random access response detection method according to the first aspect when executing the program.

In a sixth aspect, there is provided a base station side apparatus including a memory, a processor, and a program stored on the memory and executable on the processor; wherein the processor implements the random access response detection method according to the third aspect when executing the program.

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

The beneficial effects of the invention are as follows:

in the embodiment of the application, the problem of overlong time delay of random access response is avoided by configuring the time offset, and the problem that the terminal detects the introduced random access response confusion caused by a plurality of random access responses corresponding to the random access opportunity RO sent by the terminal in a random access window or the terminal cannot judge the effective random access response in the detected random access responses corresponding to the RO sent by the terminal can be avoided by configuring the set threshold value of the difference value of the indication TA and the estimated TA.

Drawings

Fig. 1 is a schematic diagram of a feedback random access response after a base station waits for a preamble detection window to end in the prior art;

fig. 2 is a schematic diagram of a feedback random access response after a base station does not wait for a preamble detection window to end in the prior art;

fig. 3 is a schematic diagram showing steps of a random access response detection method according to an embodiment of the present invention;

Fig. 4 is a schematic diagram showing a first time offset set in a random access response detection method according to an embodiment of the present invention;

fig. 5 is a schematic diagram showing a second time offset set in the random access response detection method according to the embodiment of the invention;

fig. 6 is a schematic diagram of a base station dividing preamble detection window in a random access response detection method according to an embodiment of the present invention;

fig. 7 is a logic diagram of a method for detecting a target random access response in a four-step random access procedure according to an embodiment of the present invention;

fig. 8 is a logic diagram of a method for detecting a target random access response in a two-step random access procedure according to an embodiment of the present invention;

fig. 9 is a schematic diagram showing another step of the random access response detection method according to the embodiment of the present invention;

fig. 10 is a schematic block diagram of a random access response detection apparatus according to an embodiment of the present invention;

fig. 11 is a schematic diagram of another module of a random access response detection apparatus according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the "first" and "second" distinguished objects generally are of the type and do not limit the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

In order to enable those skilled in the art to better understand the embodiments of the present application, the following description is provided.

The techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and the sixth generation of mobile communication techniques that may follow. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies.

The terminal described in the present invention refers to a terminal side product capable of supporting a communication protocol of a land mobile communication system, and a Modem module (Wireless Modem) for special communication, which can be integrated by various types of terminal forms such as a mobile phone, a tablet computer, a data card, etc. to complete a communication function.

The random access response detection method provided by the embodiment of the application is described in detail below by means of specific embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 3, an embodiment of the present application provides a random access response detection method, which is applied to a terminal, and includes:

step 31, acquiring first configuration information and sending leading information to a base station;

step 32, determining the starting time of the random access response window according to the first configuration information, and starting the random access response window when the starting time arrives;

step 33, detecting a random access response within the random access response window.

Optionally, the first configuration information includes: a first time offset;

the determining the starting time of the random access response window according to the first configuration information, and starting the random access response window when the starting time arrives, includes:

after the preamble information of the four-step random access procedure or the message MsgA of the two-step random access procedure is sent, referring to the downlink timing or the uplink timing before TA compensation is not performed, after waiting for the first time offset, starting a random access response window.

It should be noted that the first configuration information is acquired before the preamble information is sent, or may be acquired as broadcast information, and system configuration information is received, where the first configuration information is configured by the base station or the terminal according to an existing protocol.

As shown in fig. 4, the system configures a first time offset, which indicates that after the base station starts the preamble detection window, the base station delays the first time offset and feeds back the random access response corresponding to the detected preamble in the preamble detection window, and when the corresponding terminal starts the random access response window, the corresponding terminal needs to delay a first time offset rariffset 1 based on the existing protocol and then start the random access response window.

In a four-step random access procedure (4-step RACH), the existing standard protocol agrees that after the terminal transmits Msg1, i.e., the preamble sequence, the terminal starts a random access response window in the common search space type 1-PDCCH CSS of the first configured physical downlink control channel. In the present application, after the terminal will refer to the downlink timing or the uplink timing waiting duration RARoffset1 before TA compensation after sending the preamble, assuming that the time is T0, the first configured type 1-PDCCH CSS starts to start the random access response window.

In a two-step random access procedure (2-step RACH), the existing standard protocol agrees to start the random access response window after the terminal transmits MsgA, i.e. preamble and PUSCH, at the first configured type 1-PDCCH CSS or the first configured PDCCH CSS scrambled by the detection cell radio network identity (Cell Radio Network Shared Channel, C-RNTI). In the present application, after transmitting MsgA, the terminal starts to start the random access response window at the first configured type 1-PDCCH CSS or the first configured PDCCH CSS with C-RNTI scrambling with reference to the downlink timing or the uplink timing waiting period RARoffset1 before TA compensation.

Optionally, the first configuration information includes: a first time offset and a second time offset;

the determining the starting time of the random access response window according to the first configuration information, and starting the random access response window when the starting time arrives includes:

when the terminal performs TA compensation of the uplink timing advance adjustment quantity, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the downlink timing or the uplink timing before TA compensation, and starting a random access response window after waiting for the first time offset;

when the terminal does not carry out TA compensation, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the downlink timing or the uplink timing before TA compensation, and starting a random access response window after waiting for the sum of the time of the first time offset and the second time offset.

Considering that the long-distance communication scene can not make timing advance compensation, compared with the prior art, after the terminal transmits the preamble to the base station, the terminal can not receive the random access response transmitted by the base station until waiting for twice of propagation delay. As shown in fig. 5, in this application, the system may configure the second time offset RARoffset2, and assume that the time is T0', and the terminal starts the random access response window after waiting at least for the second time offset after transmitting the preamble or MsgA. In the embodiment of the present invention, if there is the RARoffset2, after the terminal will wait for the RARoffset1+raroffset2 with reference to the downlink timing or the uplink timing before TA compensation after sending the preamble or MsgA, the terminal starts to start the random access response window at the first configured type 1-PDCCH CSS or the first configured PDCCH CSS with the C-RNTI scrambling.

Optionally, the first time offset is greater than or equal to a maximum timing advance adjustment TA in all uplink partial broadband BWP supported by the terminal.

Further, the first configuration information further includes:

a first random access response window length L1 of the first type of terminal and a second random access response window length L2 of the second type of terminal;

the first type of terminal is a terminal capable of acquiring self and base station position information or estimating propagation delay between the self and base station;

the second type of terminal is a terminal which can not acquire the position information of the self and the base station or estimate the propagation delay between the self and the base station.

The method can acquire the position information of the base station and the self or estimate the terminal of the propagation delay between the base station and the self, namely estimate the TA detected by the base station according to the terminal sending the preamble in the random access process.

Optionally, the first configuration information includes: a second time offset and a third time offset;

when the terminal performs TA compensation, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the starting time of a response sub-window corresponding to the detection sub-window of the preamble information received by the base station, and starting a random access response window after waiting for a third time offset;

When the terminal does not perform the TA compensation, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the start time of the response sub-window corresponding to the detection sub-window of the preamble information received by the base station, waiting for the second time offset, waiting for the third time offset, and then starting the random access response window.

As shown in fig. 6, in an embodiment of the present application, a base station divides a preamble detection window into a plurality of detection sub-windows, each sub-window has a length W0, and a random access response in one detection sub-window is correspondingly fed back in one random access response sub-window. For example, the preamble of the detection in the nth detection sub-window will correspond to the length of [ t1+ (n-1) x W0, t1+n x W0] in which the nth detection sub-window is transmitted, the length of the nth random access response sub-window being [ Tn, tn+l0]. Where L0 is the response sub-window length, T1 is the start time position of the base station side preamble detection window, that is, the start position of the first preamble detection sub-window, tn may be set to t1+n×w0, or t1+n×l0, where n is an integer greater than or equal to 1. Further, either the parameters W0, L0 may depend on the base station implementation, or be configured by system high-level signaling, or protocol configuration. Further, the response sub-window length L0 may be equal to the random access response window length L1 of the first type terminal or the random access response window length L2 of the second type terminal.

Correspondingly, the method for starting the random access response window by the terminal comprises the following steps: after transmitting the preamble or MsgA, starting to start the random access response window at the first configured type 1-PDCCH CSS or the first configured-detection C-RNTI wrapped PDCCH CSS with reference to the downlink timing or the uplink timing waiting duration t2_ue before TA compensation.

For a first terminal, T2_UE represents a starting time position of a response sub-window corresponding to a preamble detection sub-window in which a transmission preamble estimated by the terminal falls;

for the second terminal, t2_ue indicates a start time position of a response sub-window corresponding to the first preamble detection sub-window.

If the terminal transmits the preamble or the MsgA without performing TA compensation, the system configures a second time offset rariffset 2, and after the corresponding terminal waits for a period of time t2_ue+rariffset 2 with reference to the downlink timing or the uplink timing before performing TA compensation after transmitting the preamble or the MsgA, the random access response window starts to be started at the first configured type 1-PDCCH CSS or the first configured PDCCH CSS with the C-RNTI being detected.

Optionally, the detecting a random access response in the random access response window includes:

when a physical downlink shared channel PDSCH is detected by utilizing a random access radio network identifier RA-RNTI corresponding to a random access opportunity RO, detecting a first random access response corresponding to a protocol data subunit MACCUbPDU of one or more media intervention control layers in the PDSCH, and when the first random access response contains a first preamble information identifier matched with a preamble information identifier sent by the terminal, the first random access response is a second random access response;

The first type terminal calculates the difference value between the indication TA and the estimated TA of the second random access response, wherein the difference value between the indication TA and the estimated TA is smaller than a second random access response of a first set threshold value and/or the second random access response with the minimum difference value between the indication TA and the estimated TA is the target random access response of the first type terminal;

a second type of terminal randomly selecting one second random access response as a target random access response of the second type of terminal;

the second type of terminal is a terminal incapable of acquiring the position information of the second type of terminal and the base station or estimating the propagation delay between the second type of terminal and the base station;

the indicated TA is calculated by the base station according to the preamble information and is sent to the terminal TA, the estimated TA is calculated by the terminal TA, and the first set threshold is obtained by the terminal through a higher-layer Radio Resource Control (RRC) signaling or is determined according to a protocol or according to terminal implementation.

Optionally, the second random access response of which the difference between the indicated TA and the estimated TA is smaller than the first set threshold and/or the second random access response of which the difference between the indicated TA and the estimated TA is minimum is a target random access response of the first type of terminal, including:

If a second random access response exists, the difference value between the indicated TA and the estimated TA is smaller than a first set threshold value, the second random access response, the difference value between the indicated TA and the estimated TA is smaller than the first set threshold value, is the target random access response of the first type of terminal;

if there is no second random access response that the difference between the indicated TA and the estimated TA is smaller than the first set threshold, the second random access response that the difference between the indicated TA and the estimated TA is minimum is the target random access response of the first type terminal, or it is determined that there is no target random access response of the first type terminal in the second random access response.

Optionally, the detecting the random access response within the random access response window further includes:

and when the first type terminal does not recognize the target random access response of the first type terminal, continuing to detect the random access response until the target random access response is recognized or a random access response window is overtime.

In an embodiment of the present application, when a 4-step RACH is employed to initiate contention-based random access:

for a first terminal, attempting to identify a random access response by using an RA-RNTI corresponding to a transmission RO, wherein the target RAR possibly meets the conditions including:

Condition 11: the terminal successfully detects RAR by adopting RA-RNTI corresponding to the transmitted RO;

condition 12: the RAR comprises a preamble identifier corresponding to a terminal sending preamble;

condition 13: the difference between the TA indicated in the RAR and the estimated TA of the terminal is smaller than a first set threshold;

the first set threshold is obtained by the terminal through the higher-layer Radio Resource Control (RRC) signaling, or is determined according to a protocol or according to terminal implementation.

If one RAR simultaneously satisfies the conditions 11, 12 and 13, the RAR is a first target RAR;

if one RAR satisfies both conditions 11 and 12, then the RAR is the second target RAR.

As shown in fig. 7, if the first terminal detects the first target RAR in the random access response window, it determines that the random access response is successfully received, and then stops the timing of the random access response window or does not stop the timing of the random access response window and continues to attempt to detect the random access response with the RA-RNTI corresponding to the transmission RO;

if the terminal detects a plurality of first target RARs when continuing detection, selecting one of the first target RARs with the smallest difference between the indicated TA and the estimated TA as the target RAR, and preparing for sending Msg3 according to the uplink Grant UL Grant indication of the target RAR;

And if the timing of the random access response window is exceeded, the terminal does not detect the first target RAR, re-initiating random access according to a preamble retransmission flow of the 4-step RACH, or selecting the second target RAR under a contention random access mechanism, selecting the target RAR with the smallest difference between the indication TA and the estimated TA in the second target RAR, and preparing the transmission of Msg3 according to an uplink grant UL grant indication of the RAR.

For the second terminal, when the random access response window is started, the random access response is detected according to an existing protocol, for example, a 4-step RACH protocol procedure in 3gpp 38.321 or 3gpp 36.321 protocol.

when a random access response is detected by using a C-RNTI carried by an MsgA PUSCH, the random access response is a target random access response;

when detecting a physical downlink shared channel PDSCH by utilizing a random access radio network identifier MsgB-RNTI corresponding to a random access opportunity RO, detecting that a protocol data subunit MACCSubPDU of a media intervention control layer in the PDSCH contains a third random access response matched with a message MsgA;

When the third random access response has the contention resolution identifier, the third random access response is a target random access response;

when detecting that one or more protocol data subunits MACCSubPDU of the media intervention control layer in the PDSCH contains a back-off random access response matched with the preamble identification of the message MsgA;

calculating a difference value between an indication TA and an estimated TA of the back-off random access response by a first type terminal, wherein the difference value between the indication TA and the estimated TA is smaller than a back-off random access response of a second set threshold value and/or the back-off random access response with the minimum difference value between the indication TA and the estimated TA is a target random access response of the first type terminal;

the second class terminal randomly selects one of the rollback random access responses as the target random access response of the second class terminal, or continues to detect the random access response until the target random access response is detected or a random access response window is overtime;

The indicated TA is calculated by the base station according to the rollback random access response and is sent to the terminal TA, the estimated TA is calculated by the terminal TA, and the second set threshold is obtained by the terminal through a higher-layer Radio Resource Control (RRC) signaling or is determined according to a protocol or according to terminal implementation.

Optionally, the fallback random access response of which the difference between the indicated TA and the estimated TA is smaller than the second set threshold and/or the fallback random access response of which the difference between the indicated TA and the estimated TA is minimum is the target random access response of the first type of terminal, including:

if the rollback random access response that the difference value between the indicated TA and the estimated TA is smaller than a second set threshold exists, the rollback random access response that the difference value between the indicated TA and the estimated TA is smaller than the second set threshold is the target random access response of the first type terminal;

if the rollback random access response that the difference value between the indicated TA and the estimated TA is smaller than the second set threshold value does not exist, the rollback random access response with the smallest difference value between the indicated TA and the estimated TA is the target random access response of the first type terminal, or the target random access response of the first type terminal is judged to be absent in the rollback random access response.

Optionally, the detecting the random access response in the random access response window further includes:

It should be noted that, the second set threshold and the first set threshold may be the same or different parameters, and may be obtained from the first configuration information, or obtained according to a protocol convention, or may depend on the terminal implementation.

In an embodiment of the present application, when a 2-step RACH is employed to initiate contention-based random access:

for the first terminal, attempting to identify a random access response by using the MsgB-RNTI corresponding to the sent RO and/or the C-RNTI contained in the MsgA, wherein the conditions possibly met by the target RAR include:

condition 21: the terminal successfully detects RAR by adopting MsgB-RNTI corresponding to the transmitted RO;

condition 22: the RAR is a rollback fallback RAR and comprises a preamble identifier corresponding to a terminal sending preamble;

condition 23: the difference between the TA indicated in the fallback RAR and the estimated TA is smaller than a second set threshold;

condition 24: the system frame number SFN indicated in the PDCCH corresponding to the detected RAR is consistent with the SFN where the terminal sends the RO;

Condition 25: the RAR is 'success RAR', which contains a competition conflict resolution identification corresponding to the MsgA of the terminal; for example, the contention resolution identity (Contention Resolution Identity, CRI) in the MAC subPDU received by the terminal matches the CCCH SDU in MsgA;

condition 26: under the existing protocol, the terminal adopts a C-RNTI contained in the transmitting MsgA to identify the random access response and judges the condition that the random access response is successfully received; for example, the beam failure resumes the initiated random access, and if the PDCCH is identified by using the C-RNTI sent by the terminal MsgA, the random access response can be judged to be successfully received.

If one RAR satisfies conditions 21, 22, 23 and 24 simultaneously, then the RAR is a third target RAR;

if one RAR meets conditions 11, 24 and 25 simultaneously, then the RAR is a fourth target RAR;

if one RAR satisfies condition 26, the RAR is a fifth target RAR;

if one RAR satisfies conditions 21, 22 and 24, then the RAR is a sixth target RAR.

As shown in fig. 8, if the first terminal detects the fourth target RAR or the fifth target RAR in the random access response window, it determines that the random access response is received successfully, and stops the random access response window timing.

If the first terminal detects the third target RAR, the first terminal can choose to prepare the transmission of the Msg3 and/or judge that the random access is successful according to the uplink grant UL grant indication of the RAR, and then stop the timing of a random access response window or not stop the timing of the random access response window and continue to attempt to detect the random access response by using the Msg-RNTI corresponding to the transmission RO or the allocated C-RNTI.

If the terminal detects a plurality of third target RARs and does not detect a fourth or fifth target RAR during continuous detection, selecting one of the target RARs with the smallest difference between the indicated TA and the estimated TA as the target RAR, and preparing for sending Msg3 according to the uplink grant UL grant indication of the target RAR.

And when the timing of the random access response window is overtime, the terminal does not detect the third, fourth or fifth target RAR, re-initiating random access according to the MsgA retransmission flow of the 2-step RACH, or selecting the target RAR with the smallest difference between the indication TA and the estimated TA in the sixth target RAR under the competition random access mechanism, and preparing the transmission of Msg3 according to the uplink authorization UL grant indication of the target RAR.

The embodiment of the application also provides a random access response detection method, which is applied to the base station and comprises the following steps:

step 91, after receiving the preamble information of the four-step random access procedure or the message MsgA of the two-step random access procedure, feeding back the random access response corresponding to the detected preamble information in the preamble detection window.

Optionally, the feeding back the random access response corresponding to the detection preamble information in the preamble detection window includes:

and delaying the time offset after the initial position of the preamble detection window, and feeding back the random access response corresponding to the detection preamble information in the preamble detection window.

As shown in fig. 5, after the initial position of the preamble detection window, the time offset RARoffset1 is delayed again to feed back the random access response corresponding to the detection preamble information in the preamble detection window.

Optionally, the time offset includes:

when the terminal performs TA compensation of an uplink timing advance adjustment quantity, after receiving preamble information of a four-step random access process or message MsgA of a two-step random access process, referring to downlink timing or uplink timing before TA compensation, determining a first time offset, wherein the first time offset is the time offset;

when the terminal does not carry out the TA compensation of the uplink timing advance adjustment quantity, after receiving the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the downlink timing or the uplink timing before the TA compensation is not carried out, determining the first time offset, wherein the sum of the first time offset and the second time offset is the time offset.

Optionally, the feeding back the random access response corresponding to the detection preamble information in the preamble detection window further includes:

dividing a preamble detection window into a plurality of detection sub-windows, and configuring response sub-windows corresponding to the detection sub-windows one by one;

and feeding back a random access response corresponding to the preamble information or the message MsgA in the detection sub-window in a response sub-window corresponding to the detection sub-window.

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

As shown in fig. 10, the embodiment of the present application further provides a random access response detection apparatus 10, which is applied to a terminal, and includes:

an obtaining module 101, configured to obtain first configuration information;

A determining module 102, configured to determine a start timing of the random access response window according to the first configuration information, and start the random access response window when the start timing arrives;

a detection module 103, configured to detect a random access response within the random access response window.

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

The random access response detection device in the embodiment of the present application may be a device with an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.

The embodiment of the application also provides a terminal, which comprises a memory, a processor and a program stored in the memory and capable of running on the processor; the processor implements the random access response detection method applied to the terminal as described above when executing the program.

As shown in fig. 11, the embodiment of the present application further provides a random access response detection apparatus 11, which is applied to a base station, and includes:

and a feedback module 111, configured to feedback a random access response corresponding to the detected preamble information in the preamble detection window after receiving the preamble information of the four-step random access procedure or the message MsgA of the two-step random access procedure.

The embodiment of the application also provides base station side equipment, which comprises a memory, a processor and a program which is stored in the memory and can run on the processor; the processor, when executing the program, implements the random access response detection method applied to the base station as described above.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, where the program or the instruction implements each process of the embodiment of the random access response detection method when executed by a processor, and the process can achieve the same technical effect, which is not described herein again.

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

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

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

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

A1. A random access response detection method, applied to a terminal, comprising:

detecting a random access response within the random access response window.

A2. The random access response detection method according to claim A1, wherein the first configuration information includes: a first time offset;

after the preamble information of the four-step random access process or the message MsgA of the two-step random access process is sent, referring to the downlink timing or the uplink timing before the advance adjustment amount TA compensation is not performed, after waiting for the first time offset, starting a random access response window.

A3. The random access response detection method according to claim A1, wherein the first configuration information includes: a first time offset and a second time offset;

when the terminal performs the TA compensation of the uplink timing advance adjustment, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the downlink timing or the uplink timing before the TA compensation of the advance adjustment, and starting a random access response window after waiting for the first time offset;

when the terminal does not perform the TA compensation, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the downlink timing or the uplink timing before the TA compensation, and starting the random access response window after waiting for the sum of the time of the first time offset and the second time offset.

A4. A method according to claim A2 or A3, characterized in that the first time offset is larger than or equal to the maximum timing advance adjustment TA in all uplink partial broadband BWP supported by the terminal.

A5. The random access response detection method according to claim A2 or A3, wherein the first configuration information further includes:

A6. The random access response detection method according to claim A1, wherein the first configuration information includes: a second time offset and a third time offset;

when the terminal does not perform the TA compensation, after sending the preamble information of the four-step random access process or the message MsgA of the two-step random access process, referring to the start time of the response sub-window corresponding to the detection sub-window of the preamble information received by the base station, waiting for the second offset, and then waiting for the third offset, starting the random access response window.

A7. The random access response detection method according to claim A1, wherein the detecting a random access response within the random access response window comprises:

the indicated TA is calculated by the base station according to the preamble information and is sent to the terminal to adjust the TA in advance, the estimated TA is calculated by the terminal to adjust the TA in advance, and the first set threshold is obtained by the terminal through a higher-layer Radio Resource Control (RRC) signaling or is determined according to a protocol or according to the terminal implementation.

A8. The method according to claim A7, wherein the second random access response in which the difference between the indicated TA and the estimated TA is smaller than a first set threshold and/or the first random access response in which the difference between the indicated TA and the estimated TA is smallest is the target random access response of the first type of terminal, comprising:

A9. The method of random access response detection according to claim A7, wherein detecting a random access response within the random access response window further comprises:

A10. The random access response detection method according to claim A1, wherein the detecting a random access response within the random access response window comprises:

The indicated TA is calculated by the base station according to the rollback random access response and is sent to the terminal to adjust the TA in advance, the estimated TA is calculated by the terminal to adjust the TA in advance, and the second set threshold is obtained by the terminal through a higher-layer Radio Resource Control (RRC) signaling or is determined according to a protocol or according to the terminal implementation.

A11. The method according to claim a10, wherein the fallback random access response with the difference between the indicated TA and the estimated TA being smaller than a second set threshold and/or the fallback random access response with the smallest difference between the indicated TA and the estimated TA is the target random access response of the first type of terminal, comprising:

A12. The random access response detection method according to claim a10, wherein the detecting a random access response within the random access response window further comprises:

B13. A random access response detection method applied to a base station, comprising:

B14. The method for detecting a random access response according to claim B13, wherein feeding back a random access response corresponding to the detected preamble information in the preamble detection window includes:

B15. The method for detecting a random access response according to claim B14, wherein the time offset includes:

B16. The method for detecting a random access response according to claim B14, wherein feeding back the random access response corresponding to the detection of the preamble information in the preamble detection window further comprises:

C17. A random access response detection apparatus, applied to a terminal, comprising:

D18. A terminal comprising a memory, a processor and a program stored on the memory and executable on the processor; a random access response detection method according to any one of claims A1 to a12, characterized in that said processor, when executing said program, implements said random access response detection method.

E19. A random access response detection apparatus applied to a base station, comprising:

F20. A base station side apparatus comprising a memory, a processor, and a program stored on the memory and executable on the processor; a random access response detection method according to any one of claims B13 to B16, wherein said processor when executing said program.

G21. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the random access response detection method according to any of the claims A1 to a12 or the steps of the random access response detection method according to any of the claims B13 to B16.

Claims

1. A random access response detection method, applied to a terminal, comprising:

detecting a random access response within the random access response window, comprising:

the indicated TA is calculated by the base station according to the preamble information and is sent to the terminal to adjust the TA in advance, the estimated TA is calculated by the terminal to adjust the TA in advance, and the first set threshold is obtained by the terminal through a higher-layer Radio Resource Control (RRC) signaling or is determined according to a protocol or according to terminal implementation; or alternatively

2. The random access response detection method according to claim 1, wherein the first configuration information includes: a first time offset;

3. The random access response detection method according to claim 1, wherein the first configuration information includes: a first time offset and a second time offset;

4. A random access response detection method according to claim 2 or 3, characterized in that the first time offset is larger than or equal to the maximum timing advance adjustment TA in all uplink partial broadband BWP supported by the terminal.

5. A random access response detection method according to claim 2 or 3, wherein the first configuration information further comprises:

6. The random access response detection method according to claim 1, wherein the first configuration information includes: a second time offset and a third time offset;

7. The random access response detection method according to claim 1, wherein the second random access response in which the difference between the indicated TA and the estimated TA is smaller than a first set threshold value and/or the first random access response in which the difference between the indicated TA and the estimated TA is smallest is a target random access response of the first type of terminal, including:

8. The method of claim 1, wherein the detecting a random access response within the random access response window further comprises:

9. The method according to claim 1, wherein the fallback random access response with the difference between the indicated TA and the estimated TA being smaller than a second set threshold and/or the fallback random access response with the smallest difference between the indicated TA and the estimated TA is the target random access response of the first type of terminal, comprising:

10. The random access response detection method according to claim 1, wherein the detecting a random access response within the random access response window further comprises:

11. A random access response detection method applied to a base station, comprising:

after receiving the preamble information of the four-step random access process or the message MsgA of the two-step random access process, feeding back a random access response corresponding to the detection preamble information in a preamble detection window;

wherein detecting, by the terminal, a random access response within the random access response window comprises:

When a random access response is detected by using a C-RNTI carried by the MsgAPUSCH, the random access response is a target random access response;

12. The method for detecting a random access response according to claim 11, wherein feeding back a random access response corresponding to the detected preamble information in the preamble detection window comprises:

13. The random access response detection method of claim 12, wherein the time offset comprises:

14. The method for detecting a random access response according to claim 12, wherein feeding back the random access response corresponding to the detection of the preamble information in the preamble detection window further comprises:

15. A random access response detection apparatus, applied to a terminal, comprising:

A detection module, configured to detect a random access response in the random access response window, including:

16. A terminal comprising a memory, a processor and a program stored on the memory and executable on the processor; a random access response detection method according to any one of claims 1 to 10, characterized in that said processor, when executing said program, implements said random access response detection method.

17. A random access response detection apparatus applied to a base station, comprising:

the feedback module is used for feeding back the random access response corresponding to the detection leading information in the leading detection window after receiving the leading information of the four-step random access process or the message MsgA of the two-step random access process;

18. A base station side apparatus comprising a memory, a processor, and a program stored on the memory and executable on the processor; a random access response detection method according to any one of claims 11 to 14, characterized in that said processor when executing said program is implemented.

19. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the random access response detection method according to any of claims 1 to 10 or the steps of the random access response detection method according to any of claims 11 to 14.