Granted Patent B2

US 12,500,686 · App. 17/909,137 · Granted Dec 16, 2025

Inventor: Qin Mu (Beijing, CN)

Assignee: Beijing Xiaomi Mobile Software Co., Ltd.

H04L1/0003H04W74/0833

Abstract

Claims (67)

1 . A method for data transmission, the method comprising:

sending, by a transmitter, a random access request by using a first-random access resource, wherein the random access resource comprises a first random access resource or a second random access resource, the first random access resource is configured to a transmitter supporting a first modulation scheme and a second modulation scheme, and the second random access resource is configured to a transmitter supporting the first modulation scheme but other than the first random access resource;

receiving, by the transmitter, a random access response, wherein the random access response is sent based on a target modulation scheme, the target modulation scheme is one of the first modulation scheme and the second modulation scheme, the second modulation scheme comprises a high-order modulation scheme whose modulation order is higher than the modulation order of the first modulation scheme, and the target modulation scheme is determined based on the random access resource used by the random access request, and wherein the first modulation scheme or the second modulation scheme is determined as the target modulation scheme in accordance with determining that the random access resource used by the random access request is the first random access resource, and the first modulation scheme is determined as the target modulation scheme in accordance with determining that the random access resource used by the random access request is the second random access resource;

performing, by the transmitter, a data modulation in accordance with the target modulation scheme; and

transmitting, by the transmitter, modulated data to a receiver.

2 . The method according to claim 1 , wherein sending, by the transmitter, the random access request by using the first-random access resource comprises:

sending, by the transmitter, the random access request by using the first random access resource in accordance with to determining by the transmitter that a channel quality meets a channel quality requirement.

3 . The method according to claim 2 , wherein sending, by the transmitter, the random access request by using the first random access resource in accordance with to determining by the transmitter that the channel quality meets the channel quality requirement comprises:

sending, by the transmitter, the random access request by using the first random access resource in accordance with to determining that a reference signal received power (RSRP) of the transmitter is higher than a threshold; or

sending, by the transmitter, the random access request by using the first random access resource in accordance with to determining that a physical random access channel (PRACH) coverage enhancement level of the transmitter belongs to one or more target levels.

4 . The method according to claim 1 , wherein the first random access resource comprises at least one of: a time resource, a frequency resource, or a code domain resource.

5 . The method according to claim 1 , wherein transmitting, by the transmitter, the modulated data to the receiver comprises:

transmitting, by the transmitter, the modulated data to the receiver through Message 3 (MSG3).

6 . The method according to claim 1 , wherein the first modulation scheme is comprised in a first mapping relationship and the second modulation scheme is comprised in a second mapping relationship, wherein both the first mapping relationship and the second mapping relationship are among modulation and coding scheme (MCS) indexes, modulation schemes and TBS indexes;

wherein the random access response comprises first indication information and second indication information, wherein the first indication information indicates a target mapping relationship that is the first mapping relationship or the second mapping relationship, and the second indication information indicates the MCS index determined according to the target mapping relationship; or

wherein the target modulation scheme is the second modulation scheme, and the random access response comprises second indication information that indicates the MCS index determined according to the second mapping relationship.

7 . The method according to claim 6 , wherein performing, by the transmitter, the data modulation in accordance with the target modulation scheme comprises:

determining, by the transmitter, the target mapping relationship corresponding to the target modulation scheme;

determining, by the transmitter, the target modulation scheme based on the target mapping relationship and the MCS index; and

performing, by the transmitter, the data modulation in accordance with the target modulation scheme.

8 . The method according to claim 1 , further comprising:

receiving, by the transmitter, configuration information sent by the receiver, wherein the configuration information indicates the first random access resource.

9 . The method according to claim 8 , wherein receiving, by the transmitter, the configuration information sent by the receiver comprises:

receiving, by the transmitter, a broadcast message carrying the configuration information and sent by the receiver.

10 . The method according to claim 1 , wherein

the first modulation scheme comprises at least one of: a quadrature phase shift keying modulation scheme or a binary phase shift keying modulation scheme, and

the second modulation scheme comprises at least one of: a 16-quadrature amplitude modulation scheme or a 64-quadrature amplitude modulation scheme.

11 . A method for data transmission, the method comprising:

receiving, by a receiver, a random access request;

determining, by the receiver, a target modulation scheme based on a random access resource used by the random access request, wherein the target modulation scheme is one of a first modulation scheme and a second modulation scheme, and the second modulation scheme comprises a higher-order modulation scheme whose modulation order is higher than the modulation order of the first modulation scheme, and wherein determining, by the receiver, the target modulation scheme based on the random access resource used by the random access request comprises:

determining, by the receiver, the first modulation scheme or the second modulation scheme as the target modulation scheme in accordance with determining that the random access resource used by the random access request is a first random access resource; or

determining, by the receiver, the first modulation scheme as the target modulation scheme in accordance with determining that the random access resource used by the random access request is a second random access resource;

wherein the first random access resource is configured to a transmitter supporting the first modulation scheme and the second modulation scheme, and the second random access resource is configured to a transmitter supporting the first modulation scheme but other than the first random access resource;

sending, by the receiver, a random access response based on the target modulation scheme; and

receiving, by the receiver, modulated data modulated by the transmitter in accordance with the target modulation scheme.

12 . The method according to claim 11 , wherein receiving, by the receiver, the modulated data comprises:

receiving, by the receiver, the modulated data sent through Message 3 (MSG3).

13 . The method according to claim 11 , wherein the first modulation scheme is comprised in a first mapping relationship and the second modulation scheme is comprised in a second mapping relationship, wherein both the first mapping relationship and the second mapping relationship are among modulation and coding scheme (MCS) indexes, modulation schemes and TBS indexes;

wherein the random access resource used by the random access request is a first random access resource, and the random access response comprises first indication information and second indication information, wherein the first indication information indicates a target mapping relationship that is the first mapping relationship or the second mapping relationship, and the second indication information indicates the MCS index determined according to the target mapping relationship; or

wherein the random access resource used by the random access request is a first random access resource, the target modulation scheme is the second modulation scheme, and the random access response comprises second indication information that indicates the MCS index determined according to the second mapping relationship.

14 . The method according to claim 11 , wherein sending, by the receiver, the random access response comprises:

sending, by the receiver, the random access response in accordance with the first modulation scheme;

or

sending, by the receiver, the random access response in accordance with the second modulation scheme.

15 . The method according to claim 11 , further comprising:

sending, by the receiver, configuration information that indicates the first random access resource.

16 . The method according to claim 15 , wherein sending, by the receiver, the configuration information comprises:

sending, by the receiver, a broadcast message carrying the configuration information.

17 . The method according to claim 11 , wherein

the first modulation scheme comprises at least one of: a quadrature phase shift keying modulation scheme or a binary phase shift keying modulation scheme; and

the second modulation scheme comprises at least one of: a 16-quadrature amplitude modulation scheme or a 64-quadrature amplitude modulation scheme.

18 . A data transmission apparatus, applicable to a receiver, comprising:

one or more processors; and

a memory for storing executable instructions for the one or more processors;

wherein the executable instructions when collectively executed by the one or more processors, cause the data transmission apparatus to for perform the method according to claim 11 .

19 . The method according to claim 11 , wherein the random access request is sent by the transmitter in accordance with a channel quality meeting a channel quality requirement, and

wherein the channel quality meeting the channel quality requirement comprises:

a reference signal received power (RSRP) of the transmitter being higher than a threshold; or

a physical random access channel (PRACH) coverage enhancement level of the transmitter belonging to one or more target levels.

20 . A data transmission apparatus, comprising:

one or more processors; and

a memory for storing executable instructions for the one or more processors;

wherein the one or more processors are collectively configured to:

send a random access request by using a random access resource, wherein the random access resource comprises a first random access resource or a second random access resource, the first random access resource is configured to a transmitter supporting a first modulation scheme and a second modulation scheme, and the second random access resource is configured to a transmitter supporting the first modulation scheme but other than the first random access resource;

receive a random access response, wherein the random access response is sent based on a target modulation scheme, the target modulation scheme is one of the first modulation scheme and the second modulation scheme, the second modulation scheme comprises a high-order modulation scheme whose modulation order is higher than the modulation order of the first modulation scheme, and the target modulation scheme is determined based on the random access resource used by the random access request, and wherein the first modulation scheme or the second modulation scheme is determined as the target modulation scheme in accordance with determining that the random access resource used by the random access request is the first random access resource, and the first modulation scheme is determined as the target modulation scheme in accordance with determining that the random access resource used by the random access request is the second random access resource;

perform a data modulation in accordance with the target modulation scheme; and

transmit modulated data to a receiver.

Assignments (1)

Continuity (1)

References Cited (23)