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

PCT国内申请，说明书已公开。PCT domestic application, specification has been published.

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.