IP Library › Granted Patent US 12696319

Granted Patent B2

US 12696319 · App. 17/909,965 · Granted Jul 28, 2026

Communication method and apparatus, and storage medium

Inventor: Xiaowei Jiang (Beijing, CN)

Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

H04W74/0833

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Quick Facts

Patent No.: US 12696319
App. No.: 17/909,965
Granted: Jul 28, 2026
Kind: B2

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Abstract

A communication method includes: determining, by a network device, for first user equipment (UE), a first random access channel (RACH) configuration, the first RACH configuration being different from a second RACH configuration, the second RACH configuration is configured for second UE; determining, for the first RACH configuration, first identifier derivation information associated with a random access identifier, the first identifier derivation information being different from second identifier derivation information for the second RACH configuration; and determining, based on the first identifier derivation information, the random access identifier.

Claims (74)

1 . A communication method, comprising:

determining a plurality of random access channel (RACH) configurations, the plurality of RACH configurations comprising a first RACH configuration and a second RACH configuration;

determining, by a network device, the first RACH configuration for a first user equipment (UE), the first RACH configuration being different from the second RACH configuration, and the second RACH configuration being configured for a second UE;

determining, by the network device, first identifier derivation information associated with a random access identifier for the first RACH configuration, the first identifier derivation information being different from second identifier derivation information for the second RACH configuration; and

determining, based on the first identifier derivation information, the random access identifier;

wherein determining the plurality of RACH configurations comprises determining an order of the plurality of RACH configurations; and

wherein determining the first identifier derivation information associated with the random access identifier for the first RACH configuration comprises:

determining the first identifier derivation information associated with the random access identifier according to an order, among the plurality of RACH configurations, of the first RACH configuration and a number of random access channel occasions (ROs) of frequency division multiplexing supported by the first RACH configuration,

wherein the first identifier derivation information indicates a start offset of an index value of a frequency domain occasion for the first UE to transmit a random access preamble, or the first identifier derivation information indicates an index value of a frequency domain occasion for the first UE to transmit the random access preamble, and the random access preamble corresponding to the random access identifier;

wherein determining the first identifier derivation information associated with the random access identifier comprises:

determining, in response to determining that the first identifier derivation information indicates the start offset of the index value of a frequency domain occasion for the first UE to transmit the random access preamble, a value of the first identifier derivation information as a start offset of a previous neighboring RACH configuration immediately before the first RACH configuration in the order of the plurality of RACH configurations plus the number of ROs supported by the previous neighboring RACH configuration; and

determining, in response to determining that the first RACH configuration is the first one in the order of the plurality of RACH configurations, the value of the first identifier derivation information to be a predetermined start offset;

wherein the method further comprises:

transmitting, in response to determining that the first identifier derivation information indicates the start offset of the index value of the frequency domain occasion for the first UE to transmit the random access preamble, a plurality of pieces of identifier derivation information corresponding to the plurality of RACH configurations, the plurality of pieces of identifier derivation information comprising information indicating the first identifier derivation information.

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

determining, according to the plurality of pieces of identifier derivation information corresponding to the plurality of RACH configurations, the number of ROs of frequency division multiplexing supported by each of the plurality of RACH configurations.

3 . The method according to claim 2 , wherein determining, for the first RACH configuration, the first identifier derivation information associated with the random access identifier comprises:

determining, according to the first identifier derivation information corresponding to the first RACH configuration and the number of the ROs of frequency division multiplexing supported by the first RACH configuration, the index value of the frequency domain occasion for the first UE to transmit the random access preamble.

4 . The method according to claim 1 , wherein determining the first identifier derivation information associated with the random access identifier comprises:

determining, in response to determining that the first identifier derivation information indicates the index value of the frequency domain occasion for the first UE to transmit the random access preamble, a plurality of pieces of first identifier derivation information for the first RACH configuration sequentially and incrementally at a fixed step size from an index value of a last RO among a plurality of ROs of the previous neighboring RACH configuration immediately before the first RACH configuration in the order of the plurality of RACH configurations, wherein in response to determining that the first RACH configuration is the first one in the order of the plurality of RACH configurations, the plurality of pieces of first identifier derivation information for the first RACH configuration are determined sequentially and incrementally at the fixed step size from a predetermined fixed value.

5 . The method according to claim 1 , wherein the first RACH configuration is configured for a first network slice, and the second RACH configuration is configured for a second network slice, the first network slice being different from the second network slice.

6 . The method according to claim 1 , wherein the plurality of RACH configurations further comprises a common RACH configuration, and the method further comprises:

in response to determining that the first identifier derivation information indicates the start offset of the index value of the frequency domain occasion for the first UE to transmit the random access preamble, determining, in response to determining that the common RACH configuration is ranked first or last among the plurality of RACH configurations, identifier derivation information corresponding to the common RACH configuration as 0.

7 . The method according to claim 1 , wherein the plurality of RACH configurations further comprises a common RACH configuration, and the method further comprises:

in response to determining that the first identifier derivation information indicates the index value of the frequency domain occasion for the first UE to transmit the random access preamble, determining, in response to determining that the common RACH configuration is ranked first or last among the plurality of RACH configurations, identifier derivation information corresponding to the common RACH configuration as 0 to N1−1, N1 being the number of ROs of frequency division multiplexing supported by the common RACH configuration.

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

not transmitting, for the first UE, the first identifier derivation information, among the plurality of pieces of identifier derivation information, of the first RACH configuration, to indicate that the first identifier derivation information of the first RACH configuration is 0.

9 . A communication method, comprising:

receiving configuration information comprising a plurality of random access channel (RACH) configurations, the plurality of RACH configurations comprising a first RACH configuration and a second RACH configuration;

receiving, by a first user equipment (UE), configuration information of the first RACH configuration, the first RACH configuration being different from the second RACH configuration, and the second RACH configuration being configured for a second UE;

determining, by the first UE, first identifier derivation information associated with a random access identifier for the first RACH configuration, the first identifier derivation information being different from second identifier derivation information for the second RACH configuration; and

determining, based on the first identifier derivation information, the random access identifier;

wherein determining the first identifier derivation information associated with the random access identifier for the first RACH configuration comprises:

wherein determining the first identifier derivation information associated with the random access identifier comprises:

wherein the method further comprises:

receiving, in response to determining that the first identifier derivation information indicates the start offset of the index value of the frequency domain occasion for the first UE to transmit the random access preamble, a plurality of pieces of identifier derivation information corresponding to the plurality of RACH configurations, the plurality of pieces of identifier derivation information comprising information indicating the first identifier derivation information.

10 . The method according to claim 9 , further comprising:

11 . The method according to claim 10 , wherein determining the first identifier derivation information associated with the random access identifier for the first RACH configuration comprises:

12 . The method according to claim 9 , wherein determining the first identifier derivation information associated with the random access identifier comprises:

determining, in response to determining that the first identifier derivation information indicates the index value of the frequency domain occasion for the first UE to transmit the random access preamble, a plurality of pieces of first identifier derivation information for the first RACH configuration sequentially and incrementally at a fixed step size from an index value of a last RO among a plurality of ROs of a previous neighboring RACH configuration immediately before the first RACH configuration in the order of the plurality of RACH configurations, wherein when the first RACH configuration is the first one in the order of the plurality of RACH configurations, the plurality of pieces of first identifier derivation information for the first RACH configuration are determined sequentially and incrementally at the fixed step size from a predetermined fixed value.

13 . The method according to claim 9 , wherein the first RACH configuration is configured for a first network slice, and the second RACH configuration is configured for a second network slice, the first network slice being different from the second network slice.

14 . The method according to claim 9 , wherein the plurality of RACH configurations further comprises a common RACH configuration, and the method further comprises:

in response to determining that the first identifier derivation information indicates the start offset of the index value of the frequency domain occasion for the first UE to transmit the random access preamble, determining, in response to the common RACH configuration being ranked first or last among the plurality of RACH configurations, identifier derivation information corresponding to the common RACH configuration as 0.

15 . The method according to claim 9 , wherein the plurality of RACH configurations further comprises a common RACH configuration, and the method further comprises:

in response to determining that the first identifier derivation information indicates the index value of the frequency domain occasion for the first UE to transmit the random access preamble, determining, in response to the common RACH configuration being ranked first or last among the plurality of RACH configurations, identifier derivation information corresponding to the common RACH configuration as 0 to N1−1, N1 being the number of ROs of frequency division multiplexing supported by the common RACH configuration.

16 . The method according to claim 9 , further comprising:

determining, in response to the plurality of pieces of identifier derivation information excluding the first identifier derivation information of the first RACH configuration, the first identifier derivation information of the first RACH configuration as 0.

17 . A communication apparatus, comprising:

a processor; and

a memory configured for storing an executable instruction executable by the processor;

wherein

the processor is configured for implementing the communication method according to claim 9 when executing the executable instruction.

18 . A communication apparatus, comprising:

a processor; and

a memory configured for storing an executable instruction executable by the processor;

wherein the processor is configured to:

determine a plurality of random access channel (RACH) configurations, the plurality of RACH configurations comprising a first RACH configuration and a second RACH configuration;

determine the RACH configuration for a first user equipment (UE), the first RACH configuration being different from the second RACH configuration, and the second RACH configuration being configured for a second UE;

determine first identifier derivation information associated with a random access identifier for the first RACH configuration, the first identifier derivation information being different from second identifier derivation information for the second RACH configuration; and

determine, based on the first identifier derivation information, the random access identifier;

wherein the processor is further configured to:

determine an order of the plurality of RACH configurations; and

determine the first identifier derivation information associated with the random access identifier according to an order, among the plurality of RACH configurations, of the first RACH configuration and a number of random access channel occasions (ROs) of frequency division multiplexing supported by the first RACH configuration,

wherein determining the first identifier derivation information associated with the random access identifier comprises:

wherein the processor is further configured to:

transmit, in response to determining that the first identifier derivation information indicates the start offset of the index value of the frequency domain occasion for the first UE to transmit the random access preamble, a plurality of pieces of identifier derivation information corresponding to the plurality of RACH configurations, the plurality of pieces of identifier derivation information comprising information indicating the first identifier derivation information.