CN115843463A

CN115843463A - Method, apparatus, device and medium for determining random access response receiving window

Info

Publication number: CN115843463A
Application number: CN202080103161.7A
Authority: CN
Inventors: 李海涛; 胡奕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2023-03-24
Also published as: WO2022077141A1

Abstract

The application discloses a method, a device, equipment and a storage medium for determining a RAR receiving window, which relate to the field of communication, and the method comprises the following steps: the terminal sends n times of random access preambles in a repeated transmission mode, wherein n is a positive integer; and determining the starting time of a random access response receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble is sent at the last time.

Description

Method, apparatus, device and medium for determining random access response receiving window

Technical Field

The present application relates to the field of mobile communications, and in particular, to a method, an apparatus, a device, and a medium for determining a random access response receiving window.

Background

The random access procedure is a very important procedure in mobile communication. A typical random access procedure is a four-step random access procedure.

In the four-step random access process, the terminal sends a random access preamble, referred to as message 1 for short, to the network equipment; the network device sends a Random Access Response (RAR), referred to as message 2 for short, to the terminal. After the terminal sends the message 1, it opens an RAR receiving window, and monitors a Physical Downlink Control Channel (PDCCH) in the RAR receiving window. The PDCCH is a PDCCH scrambled by a Random Access radio network temporary identifier (RA-RNTI). After the PDCCH scrambled by the RA-RNTI is successfully monitored, the terminal can obtain the PDSCH scheduled by the PDCCH, wherein the PDSCH comprises RAR. The terminal sends a message 3 on the resource scheduled by the RAR, and the network equipment sends a message 4 to the terminal.

Compared with the conventional terrestrial cellular network, the signal propagation delay between the terminal and the network device in the NTN is greatly increased, and the Round Trip Time (RTT) of the NTN may even be much longer than the terminal processing Time considered in the conventional standard, so that the offset value of the start Time of the RAR receiving window needs to be redefined for the NTN.

Disclosure of Invention

The embodiment of the application provides a method, a device, equipment and a medium for determining a random access response receiving window, and redefines an offset value of a starting time of a RAR receiving window for a terminal in an NTN.

According to an aspect of the present application, there is provided a method for determining a random access response receiving window, where the method is applied to a terminal, and the method includes:

sending the random access preamble for n times by adopting a repeated transmission mode;

and determining the starting time of a random access response receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble is sent at the last time.

According to an aspect of the present application, there is provided an apparatus for determining a random access response reception window, the apparatus including:

According to an aspect of the present application, there is provided a terminal, including: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the method of determining a random access response reception window as described in the above aspect.

According to an aspect of the present application, there is provided a network device including: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the method of determining a random access response reception window as described in the above aspect.

According to an aspect of the present application, there is provided a computer-readable storage medium having stored therein executable instructions that are loaded and executed by the processor to implement the method for determining a random access response reception window according to the above aspect.

According to an aspect of the present application, there is provided a computer program product or a computer program, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium, the computer instructions being read by a processor of a computer device from the computer-readable storage medium, the computer instructions being executed by the processor to cause the computer device to perform the method for determining a random access response receiving window according to the above aspect.

According to an aspect of the present application, there is provided a chip including a programmable logic circuit or a program, the chip being configured to implement the method for determining a random access response reception window according to the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

the offset value of the initial time of the RAR receiving window is redefined for the terminal in the NTN by determining that the initial time of the random access response receiving window is the time of adding Z subframes to the subframe where the random access preamble sent for the last time is located.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a network architecture diagram of a transparent transport load NTN provided in an exemplary embodiment of the present application;

fig. 2 is a network architecture diagram of a regenerative load NTN provided by an exemplary embodiment of the present application;

fig. 3 is a flowchart of a method for determining a random access response receiving window according to an exemplary embodiment of the present application;

fig. 4 is a flowchart of a method for determining a random access response receiving window according to an exemplary embodiment of the present application;

fig. 5 is a time-frequency diagram illustrating a method for determining a random access response receiving window according to an exemplary embodiment of the present application;

fig. 6 is a flowchart of a method for determining a random access response receiving window according to an exemplary embodiment of the present application;

fig. 7 is a time-frequency diagram illustrating a method for determining a random access response receiving window according to an exemplary embodiment of the present application;

fig. 8 is a block diagram illustrating an apparatus for determining a random access response reception window according to an exemplary embodiment of the present application;

fig. 9 is a block diagram of a communication device shown in an exemplary embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Currently, the Third Generation Partnership Project (3 GPP) is studying NTN technology, which generally provides communication services to terrestrial users by means of satellite communication. Satellite communications have many unique advantages over terrestrial cellular communications. First, satellite communication is not limited by user regions, for example, general terrestrial communication cannot cover regions where communication equipment cannot be set up, such as the sea, mountains, desert, and the like, or communication coverage is not performed due to sparse population, and for satellite communication, since one satellite can cover a large ground and the satellite can orbit around the earth, theoretically every corner on the earth can be covered by satellite communication. Second, satellite communication has great social value. Satellite communication can be covered in remote mountainous areas, poor and laggard countries or areas with lower cost, so that people in the areas can enjoy advanced voice communication and mobile internet technology, the digital gap between the areas is favorably reduced and developed, and the development of the areas is promoted. Thirdly, the satellite communication distance is long, and the communication cost is not obviously increased when the communication distance is increased; and finally, the satellite communication has high stability and is not limited by natural disasters.

Communication satellites are classified into Low-Earth Orbit (LEO) satellites, medium-Earth Orbit (MEO) satellites, geosynchronous Orbit (GEO) satellites, high-elliptic Orbit (HEO) satellites, and the like according to the difference in orbital height. The main studies at the present stage are LEO and GEO.

1.LEO

The height range of the low-orbit satellite is 500 km-1500 km, and the corresponding orbit period is about 1.5 hours-2 hours. The signal propagation delay for inter-user single-hop communications is typically less than 20ms. Maximum satellite visibility time 20 minutes. The signal propagation distance is short, the link loss is less, and the requirement on the transmitting power of the user terminal is not high.

2.GEO

A geosynchronous orbit satellite, with an orbital altitude of 35786km, has a period of 24 hours of rotation around the earth. The signal propagation delay for inter-user single-hop communications is typically 250ms.

In order to ensure the coverage of the satellite and improve the system capacity of the whole satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form dozens of or even hundreds of beams to cover the ground; one satellite beam may cover a ground area several tens to hundreds of kilometers in diameter.

There are at least two NTN scenarios: transparent load NTN and regenerative load NTN. Fig. 1 shows a scenario of transparent transmission load NTN, and fig. 2 shows a scenario of regenerative load NTN.

The NTN network consists of the following network elements:

1 or more gateways for connecting the satellite and the terrestrial public network.

Feeder links: link for communication between gateway and satellite

Service link: link for communication between a terminal and a satellite

Satellite: the functions provided by the device can be divided into two types of transparent load and regenerative load.

The transparent retransmission of the signal is only provided, and the waveform signal retransmitted by the signal is not changed.

Regenerative payload, which may provide demodulation/decoding, routing/conversion, coding/modulation functions in addition to radio frequency filtering, frequency conversion and amplification functions. Which has some or all of the functionality of a base station.

Inter-satellite links (Inter-satellite links, ISL): exist in a regenerative load scenario.

Fig. 3 is a flowchart illustrating a method for determining a RAR receiving window according to an exemplary embodiment of the present application. The present embodiment is exemplified by applying the method for determining the RAR receiving window to a terminal. Optionally, the terminal is an NTN-enabled terminal. The method comprises the following steps:

step 302: the terminal sends the random access preamble for n times in a repeated transmission mode;

the repetition transmission scheme is a transmission scheme in which the same random access preamble is repeated n times on different transmission resources. Wherein n is a positive integer.

The random access preamble is also referred to as message 1.

Step 304: and the terminal determines the starting time of the RAR receiving window, wherein the starting time is equal to the time of the sub-frame where the random access preamble sent last time is located plus Z sub-frames.

In one example, Z is equal to the larger of the preset value and a first value, and the first value is determined according to a transmission backoff time when the terminal transmits the random access preamble. For example, when the terminal has the capability of performing time-frequency pre-compensation through positioning, Z is equal to the larger value of the preset value and the first value.

In one example, Z is equal to the larger of the preset value and a second value, where the second value is determined according to a common offset value, and the common offset value is determined for the start time of the RAR receiving window based on the minimum transmission delay between the terminal and the network device. For example, when the terminal has time-frequency pre-compensation capability and cannot acquire the positioning position, Z is equal to the larger value of the preset value and the second value.

The preset value is an offset value of the start time of the RAR receiving window determined in a mode in the terrestrial cellular network.

In summary, in the method provided in this embodiment, by determining that the starting time of the random access response receiving window is the time when the subframe where the random access preamble sent for the last time is located is added to Z subframes, the method implements redefining the offset value of the starting time of the RAR receiving window for the terminal in the NTN, and can improve the random access success rate of the terminal in the NTN.

In the NTN scenario, the terminal may be an NB-IoT (Narrow Band Internet of Things) terminal or an eMTC (Enhanced Machine Type Communication) terminal.

For the case where the terminal is an NB-IoT terminal, the following embodiments are provided:

fig. 4 is a flowchart illustrating a method for determining a RAR receiving window according to another exemplary embodiment of the present application. The present embodiment is exemplified by the application of the method for determining the RAR reception window to an NB-IoT terminal. Optionally, the terminal is an NTN-enabled terminal. The method comprises the following steps:

step 402: the NB-IoT terminal sends the random access preamble for n times in a repeated transmission mode;

a) And for the NB-IoT terminal with the time-frequency pre-compensation capability through the positioning capability, estimating the RTT duration according to the positioning position and the satellite position. Illustratively, the RTT duration is the RTT duration of the service link between the terminal and the satellite.

For the transparent forwarding network architecture, the NB-IoT terminal uses the sum of the RTT corresponding to the estimated service link and the common TA corresponding to the feeder link broadcasted by the network device as the transmission backoff time of message 1. Or, the rounded value of the sum of the RTT and the common TA is used as the transmission compensation time of the message 1. The rounding value is a rounding value in milliseconds.

For the regenerative forwarding network architecture, the NB-IoT terminal uses the RTT duration corresponding to the estimated service link as the transmission backoff time of the message 1. Alternatively, the rounded value of RTT is used as the transmission backoff time of message 1. The rounding value is a rounding value in milliseconds.

b) For NB-IoT terminals with time-frequency pre-compensation capability that cannot acquire a positioning location, if the network device configures a Common timing advance (Common TA), the terminal uses the Common timing advance broadcasted by the network device as the transmission compensation time for message 1.

Optionally, for NB-IoT terminals without time-frequency pre-compensation capability, the common timing advance broadcasted by the network device may also be used as the transmission compensation time of the message 1. Alternatively, the rounded value of the common timing advance is used as the transmission backoff time of the message 1. The rounding value is a rounding value in milliseconds.

And the terminal sends the random access preamble for n times in a repeated transmission mode according to the sending compensation time.

Step 404: and the NB-IoT terminal determines the starting time of the RAR receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble sent last time is positioned.

a) Under the condition that the NB-IoT terminal has the time-frequency pre-compensation capability through positioning, Z is equal to the larger value of a preset value and a first value, Z = max (X, ceil (RTT 1)), and the first value is determined according to the transmission compensation time RTT1 when the terminal transmits the random access preamble.

The first value is equal to the transmission compensation time RTT1 or an integer value of the transmission compensation time RTT1. In one example, the first value is equal to the transmission backoff time RTT1 regardless of whether the transmission backoff time RTT1 is an integer multiple of milliseconds. In another example, when the transmission backoff time RTT1 is an integer multiple of milliseconds, the first value is equal to the transmission backoff time; when the transmission backoff time RTT1 is not an integer multiple of milliseconds, the first value is equal to an integer value of the transmission backoff time. Illustratively, the first value is a rounded value in milliseconds, as shown in fig. 5;

for the transparent forwarding network architecture, the sending of the backoff time RTT1 is equal to the sum of the RTT and the common TA, or the sending of the backoff time RTT1 is equal to the rounded value of the sum of the RTT and the common TA.

For the regenerative forwarding network architecture, the sending of the backoff time RTT1 is equal to RTT, or the sending of the backoff time RTT1 is equal to an integer of RTT.

Wherein, RTT is estimated by the terminal according to the positioning location and the satellite location, the RTT duration is RTT duration of a service link between the terminal and the satellite, and the public TA is broadcasted by the network device.

b) When the NB-IoT terminal has time-frequency pre-compensation capability and cannot acquire a positioning location, Z is equal to a larger value of a preset value and a second value, for example, Z = max (X, ceil);

the second value is determined from a Common Offset value (Common Offset), which is determined for the start time of the RAR reception window based on the minimum transmission delay between the terminal and the network device. In one example, the second value is equal to the common offset value regardless of whether the common offset value is an integer multiple of milliseconds. In another example, the second value is equal to the common offset value when the common offset value is an integer multiple of milliseconds; the second value is equal to the rounded value of the common offset value when the common offset value is not an integer multiple of milliseconds. Illustratively, the second value is a rounded value in milliseconds.

Wherein the common offset value is equal to the common TA; alternatively, the common offset value is network device configured.

For the case a) and b), the preset value X is the number of subframes determined according to the duplex mode, the format of the random access preamble and n. As shown in table one:

watch 1

TDD/FDD mode	Random access preamble format	PRACH repetition number n	X
FDD	0 or 1	>＝64	41
FDD	0 or 1	<64	4
FDD	2	>＝16	41
FDD	2	<16	4
TDD	Arbitrary	Arbitrary	4

For the value of X, the processing delay of the terminal after sending the random access preamble (for example, for NB-IoT, the terminal needs to switch from uplink sending to downlink receiving, and the synchronization operation time required for subsequent PDCCH receiving) is mainly considered, and the fastest round trip delay RTT from the time when the terminal sends the random access preamble to the time when the terminal receives the RAR is considered.

In summary, in the method provided in this embodiment, by determining that the start time of the random access response receiving window is the time when the subframe where the random access preamble sent last time is located is added to Z subframes, the method implements redefining the offset value of the start time of the RAR receiving window for the NB-IoT terminal, and can improve the random access success rate of the NB-IoT terminal in the NTN.

For the case where the terminal is an eMTC terminal, the following embodiments are provided:

fig. 6 shows a flowchart of a method for determining a RAR receiving window according to another exemplary embodiment of the present application. This embodiment is exemplified by the application of the method for determining the RAR reception window to an eMTC terminal. Optionally, the terminal is an NTN-enabled terminal. The method comprises the following steps:

step 602: the eMTC terminal sends n times of random access preambles in a repeated transmission mode;

the repetition transmission scheme is a transmission scheme in which the same random access preamble is repeated n times on different transmission resources.

a) And for the eMTC terminal with the time-frequency pre-compensation capability through the positioning capability, estimating the RTT duration according to the positioning position and the satellite position. Illustratively, the RTT duration is the RTT duration of the service link between the terminal and the satellite.

For the transparent forwarding network architecture, the eMTC terminal uses the sum of the estimated RTT corresponding to the service link and the public TA corresponding to the feeder link broadcasted by the network equipment as the sending compensation time of the message 1; or, the rounded value of the sum of the RTT and the common TA is used as the transmission compensation time of the message 1. The rounding value is a rounding value in milliseconds.

For the regenerative forwarding network architecture, the eMTC terminal uses the RTT duration corresponding to the estimated service link as the transmission compensation time of the message 1. Alternatively, the rounded value of RTT is used as the transmission backoff time of message 1. The rounding value is a rounding value in milliseconds.

b) For eMTC terminals with time-frequency pre-compensation capability but unable to acquire a location position, if the network device configures a Common timing advance (Common TA), the terminal uses the Common timing advance broadcast by the network device as the transmission compensation time for message 1.

Optionally, for an eMTC terminal without time-frequency pre-compensation capability, a common timing advance broadcasted by the network device may also be used as the transmission compensation time of the message 1. Alternatively, the rounded value of the common timing advance is used as the transmission backoff time of the message 1. The rounding value is a rounding value in milliseconds.

Step 604: and the eMTC terminal determines the starting time of the RAR receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble sent last time is located.

a) When the eMTC terminal has the time-frequency pre-compensation capability through positioning, Z is equal to the larger value of a preset value and a first value, Z = max (X, ceil (RTT 1)), and the first value is determined according to the sending compensation time RTT1 when the terminal sends the random access preamble.

The first value is equal to the transmission compensation time RTT1 or an integer value of the transmission compensation time RTT1. In one example, the first value is equal to the transmission backoff time RTT1 regardless of whether the transmission backoff time RTT1 is an integer multiple of milliseconds. In another example, when the transmission backoff time RTT1 is an integer multiple of milliseconds, the first value is equal to the transmission backoff time; when the transmission backoff time RTT1 is not an integer multiple of milliseconds, the first value is equal to an integer value of the transmission backoff time. Illustratively, the first value is an integer value in milliseconds, as shown in fig. 7;

for the transparent forwarding network architecture, the sending of the compensation time RTT1 is equal to the sum of the RTT and the common TA, or the sending of the compensation time RTT1 is equal to the rounded value of the sum of the RTT and the common TA.

b) When the eMTC terminal has time-frequency pre-compensation capability and cannot acquire a positioning position, Z is equal to a larger value of a preset value and a second value, for example, Z = max (X, ceil);

For the case a) and b), the preset value is 3 subframes or 3 milliseconds.

In summary, in the method provided in this embodiment, by determining that the starting time of the random access response receiving window is the time when the subframe where the random access preamble sent for the last time is located is added to Z subframes, the redefinition of the offset value of the starting time of the RAR receiving window for the eMTC terminal in the NTN is achieved, the random access success rate of the terminal in the NTN can be improved, and the random access success rate of the eMTC terminal in the NTN can be improved.

Fig. 8 is a block diagram illustrating an apparatus for determining a RAR reception window according to an exemplary embodiment of the present application. The determining means of the RAR receive window may be implemented as all or a portion of the terminal. Alternatively, the RAR receiving window determination apparatus may be applied in a terminal. The terminal may be an NTN-capable terminal. The device comprises:

a sending module 820, configured to send the random access preamble for n times in a repeated transmission manner; wherein n is a positive integer.

A receiving module 840, configured to determine a starting time of a random access response receiving window, where the starting time is equal to a time when the subframe where the random access preamble is last sent plus Z subframes.

In an alternative design of the present application, Z is equal to:

a greater value of a preset value and a first value, the first value being determined according to a transmission backoff time when the device transmits the random access preamble;

or the like, or, alternatively,

the larger of the preset value and a second value, the second value being determined according to a common offset value, the common offset value being determined for the starting time of the random access response receiving window based on the minimum transmission delay between the apparatus and the network device.

In an optional design of the present application, in a case where the apparatus has a capability of performing time-frequency precompensation through positioning, the Z is equal to a larger value of the preset value and the first value; and under the condition that the device has the time-frequency pre-compensation capability and cannot acquire a positioning position, the Z is equal to the larger value of the preset value and the second value.

In an alternative design of the present application, the common offset value is equal to a common timing advance; or, the common offset value is configured by the network device.

In one optional design of the present application, the device is an NB-IoT device,

the preset value is the subframe number determined according to the duplex mode, the format of the random access preamble and the n.

In an alternative design of the present application, the device is an eMTC device,

the preset value is 3 subframes or 3 milliseconds.

In an optional design of the present application, the apparatus has a capability of performing time-frequency pre-compensation by positioning;

for a transparent forwarding network architecture, the transmission backoff time is equal to the sum of the RTT and the common TA; or, the sending compensation time is equal to a rounded value of the sum of the RTT and the common TA.

For a regenerative forwarding network architecture, the transmit backoff time is equal to RTT; or, the sending compensation time is equal to the rounded value of the RTT.

Wherein the RTT is estimated by the apparatus from a positioning location and a satellite location, and the common TA is broadcast by the network device.

In an optional design of the present application, the apparatus has the time-frequency pre-compensation capability and cannot acquire a positioning location;

the transmission backoff time is equal to a common TA; or, the transmission backoff time is equal to a rounded value of the common TA.

Wherein the common TA is broadcast by the network device.

In an alternative design of the present application, the first value is a rounded value in milliseconds, and the second value is a rounded value in milliseconds.

Fig. 9 shows a schematic structural diagram of a communication device (terminal or network device) provided in an exemplary embodiment of the present application, where the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 through a bus 105.

The memory 104 may be configured to store at least one instruction, which the processor 101 is configured to execute, so as to implement the steps of the method for determining the RAR receiving window mentioned in the above method embodiment.

Further, the memory 104 may be implemented by any type or combination of volatile or non-volatile storage devices, including but not limited to: magnetic or optical disk, electrically Erasable Programmable Read-Only Memory (EEPROM), erasable Programmable Read-Only Memory (EPROM), static Random Access Memory (SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (PROM).

In an exemplary embodiment, a computer readable storage medium is further provided, and at least one instruction, at least one program, a code set, or a set of instructions is stored in the computer readable storage medium, and the at least one instruction, the at least one program, the code set, or the set of instructions is loaded and executed by the processor to implement the method for determining the RAR receiving window executed by the terminal or the network device provided in the above method embodiments.

In an exemplary embodiment, a computer program product or a computer program is further provided, and the computer program product or the computer program includes computer instructions stored in a computer readable storage medium, and a processor of the communication device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to make the communication device execute the method for determining the RAR receiving window according to the above aspect.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

A method for determining a random access response receiving window is applied to a terminal, and the method comprises the following steps:

sending the random access preamble for n times by adopting a repeated transmission mode; wherein n is a positive integer;

and determining the starting time of a random access response receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble is sent at the last time.
The method of claim 1, wherein Z is equal to:

the larger value of the preset value and a first value, wherein the first value is determined according to the transmission compensation time when the terminal transmits the random access preamble;

or the like, or, alternatively,

and the second value is determined according to a common offset value, and the common offset value is determined for the starting time of the random access response receiving window based on the minimum transmission delay between the terminal and the network equipment.
The method of claim 2,

under the condition that the terminal has the time-frequency pre-compensation capability through positioning, the Z is equal to the larger value of the preset value and the first value;

and under the condition that the terminal has the time-frequency pre-compensation capability and cannot acquire a positioning position, the Z is equal to the larger value of the preset value and the second value.
The method of claim 2,

the common offset value is equal to a common timing advance;

or the like, or, alternatively,

the common offset value is configured by the network device.
The method of claim 2, wherein the terminal is a narrowband internet of things (NB-IoT) terminal;

the preset value is the subframe number determined according to the duplex mode, the format of the random access preamble and the n.
The method of claim 2, wherein the terminal is an enhanced machine type communication (eMTC) terminal;

the preset value is 3 milliseconds.
The method of any of claims 2 to 6, wherein the first value is a rounded value in milliseconds.
The method of any of claims 2 to 6, wherein the second value is an integer value in milliseconds.
The method according to any one of claims 2 to 6, wherein the terminal has a time-frequency pre-compensation capability through positioning;

for a transparent forwarding network architecture, the sending compensation time is equal to the sum of round trip transmission delay RTT and public TA, or the sending compensation time is equal to the integer of the sum of RTT and public TA;

for a regenerative forwarding network architecture, the sending backoff time is equal to the RTT, or the sending backoff time is equal to an integer of the RTT;

wherein the RTT is estimated by the terminal according to a positioning location and a satellite location, and the common TA is broadcasted by the network device.
The method according to any one of claims 2 to 6, wherein the terminal has the time-frequency pre-compensation capability and cannot acquire a positioning location;

the transmission compensation time is equal to a common Timing Advance (TA), or the transmission compensation time is equal to a rounding value of the common TA;

wherein the common TA is broadcast by the network device.
An apparatus for determining a random access response (rach) reception window, the apparatus comprising:

a sending module, configured to send the random access preamble for n times in a repeated transmission manner;

and the receiving module is used for determining the starting time of a random access response receiving window, wherein the starting time is equal to the time of adding Z subframes to the subframe where the random access preamble is located and transmitted last time.
The apparatus of claim 11, wherein Z is equal to:

a greater value of a preset value and a first value, the first value being determined according to a transmission backoff time when the device transmits the random access preamble;

or the like, or, alternatively,

the second value is determined according to a common offset value, and the common offset value is determined for the starting time of the random access response receiving window based on the minimum transmission delay between the device and the network equipment.
The apparatus of claim 12,

under the condition that the device has the capability of performing time-frequency pre-compensation through positioning, the Z is equal to the larger value of the preset value and the first value;

and under the condition that the device has the time-frequency pre-compensation capability and cannot acquire a positioning position, the Z is equal to the larger value of the preset value and the second value.
The apparatus of claim 12,

the common offset value is equal to a common timing advance;

or the like, or, alternatively,

the common offset value is configured by the network device.
The apparatus of claim 12, wherein the apparatus is a narrowband internet of things (NB-IoT) apparatus;

the preset value is the subframe number determined according to the duplex mode, the format of the random access preamble and the n.
The apparatus of claim 12, wherein the apparatus is an enhanced machine-type communication (eMTC) apparatus;

the preset value is 3 milliseconds.
The apparatus of any one of claims 12 to 16, wherein the first value is a rounded value in milliseconds.
The method of any of claims 12 to 16, wherein the second value is a rounded value in milliseconds.
The apparatus according to any one of claims 12 to 16, wherein the apparatus has a time-frequency pre-compensation capability through positioning;

for a transparent forwarding network architecture, the sending compensation time is equal to the sum of round trip transmission delay RTT and public TA, or the sending compensation time is equal to the integer of the sum of RTT and public TA;

for a regenerative forwarding network architecture, the sending backoff time is equal to the RTT, or the sending backoff time is equal to an integer of the RTT;

wherein the RTT is estimated by the apparatus from a positioning location and a satellite location, and the common TA is broadcast by the network device.
The apparatus according to any of claims 12 to 16, wherein the apparatus has the time-frequency pre-compensation capability and cannot acquire a positioning location;

the transmission compensation time is equal to a common Timing Advance (TA), or the transmission compensation time is equal to a rounding value of the common TA;

wherein the common TA is broadcast by the network device.
A terminal, characterized in that the terminal comprises:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the method of determining a random access response reception window of any of claims 1 to 10.
A computer-readable storage medium having stored thereon executable instructions that are loaded and executed by the processor to implement the method for determining a random access response reception window according to any one of claims 1 to 10.