US 12,191,989 B2Granted

Transmission mode selection method and device

AssigneeHuawei Technologies Co., Ltd.

InventorsBin Xu, Zhenzhen Cao, Bingzhao Li

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Abstract

A transmission mode selection method and a device are provided. The method includes: determining first indication information, where the first indication information is used to indicate a changed transmission mode and/or indicate to change a transmission mode; and sending the first indication information to a terminal device. There may be a plurality of transmission modes for transmitting a data packet duplicated at a PDCP layer, in other words, there may be a plurality of modes for PDCP duplication. A transmission mode can be selected by using the first indication information. For example, when reliability of a mode for PDCP duplication is not high, another transmission mode can be selected by using the first indication information. In this way, a reliability requirement of a service is met as much as possible, thereby improving transmission quality of the service.

Claims17

Dependent claims

A transmission mode selection method, comprising:

determining, by a device, first indication information, wherein the first indication information is used to indicate a change from transmission mode A to transmission mode B;
and
sending, by the device, the first indication information to a terminal device, wherein the transmission mode A is one of a first mode, a second mode, a fourth mode, or a fifth mode, and the transmission mode B is one of the first mode, the second mode, the fourth mode, or the fifth mode, and the transmission mode A is different from the transmission mode B, wherein
in the first mode, a data packet is duplicated at a packet data convergence protocol (PDCP) layer to obtain N copies of data packets, and the N copies of data packets are transmitted via N network devices connected to the terminal device, wherein N is an integer greater than or equal to 2;
in the second mode, a data packet is duplicated at a PDCP layer to obtain F copies of data packets, the F copies of data packets are transmitted via one network device connected to the terminal device, and the F copies of data packets are sent to the network device by using F logical channels of the terminal device, wherein F is an integer greater than or equal to 2;
in the fourth mode, a data packet is duplicated at a PDCP layer to obtain M copies of data packets, the M copies of data packets are transmitted via H network devices connected to the terminal device, and each of the H network devices transmits at least one of the M copies of data packets, wherein both M and H are integers greater than or equal to 2, and H is less than M;
in the fifth mode, a data packet is not duplicated at a PDCP layer, and the data packet is transmitted to a network device connected to the terminal device;
and
when the changed transmission mode indicated by the first indication information is the fifth mode, the terminal device is indicated to use a split transmission mode after the transmission mode changes, wherein the split transmission mode is a mode in which the terminal device determines, based on a first data volume threshold, to transmit data packets to a network device.

6 more elements

A transmission mode selection method, comprising:

receiving, by a device, first indication information;
and
determining, by the device based on the first indication information, a change from transmission mode A to transmission mode B, wherein the transmission mode A is one of a first mode, a second mode, a fourth mode, or a fifth mode, and the transmission mode B is one of the first mode, the second mode, the fourth mode, or the fifth mode, and the transmission mode A is different from the transmission mode B, wherein
in the first mode, a data packet is duplicated at a packet data convergence protocol (PDCP) layer to obtain N copies of data packets, and the N copies of data packets are transmitted via N network devices connected to a terminal device, wherein N is an integer greater than or equal to 2;
in the second mode, a data packet is duplicated at a PDCP layer to obtain F copies of data packets, the F copies of data packets are transmitted via one network device connected to the terminal device, and the F copies of data packets are sent to the network device by using F logical channels of the terminal device, wherein F is an integer greater than or equal to 2;
in the fourth mode, a data packet is duplicated at a PDCP layer to obtain M copies of data packets, the M copies of data packets are transmitted via H network devices connected to the terminal device, and each of the H network devices transmits at least one of the M copies of data packets, wherein both M and H are integers greater than or equal to 2, and H is less than M;
in the fifth mode, a data packet is not duplicated at a PDCP layer, and the data packet is transmitted to a network device connected to the terminal device;
and
when the changed transmission mode indicated by the first indication information is the fifth mode, determining, by the device, to use a split transmission mode after the transmission mode changes, wherein the split transmission mode is a mode in which the terminal device determines, based on a first data volume threshold, to transmit data packets to a network device.

6 more elements

A device, comprising:

a non-transitory memory storing executable instructions;
and
a processer configured to execute the executable instructions to perform operations comprising:
receiving first indication information;
and
determining, based on the first indication information, a change from transmission mode A to transmission mode B, wherein the transmission mode A is one of a first mode, a second mode, a fourth mode, or a fifth mode, and the transmission mode B is one of the first mode, the second mode, the fourth mode, or the fifth mode, and the transmission mode A is different from the transmission mode B, wherein
in the first mode, a data packet is duplicated at a packet data convergence protocol (PDCP) layer to obtain N copies of data packets, and the N copies of data packets are transmitted via N network devices connected to a terminal device, wherein N is an integer greater than or equal to 2;
in the second mode, a data packet is duplicated at a PDCP layer to obtain F copies of data packets, the F copies of data packets are transmitted via one network device connected to the terminal device, and the F copies of data packets are sent to the network device by using F logical channels of the terminal device, wherein F is an integer greater than or equal to 2;
in the fourth mode, a data packet is duplicated at a PDCP layer to obtain M copies of data packets, the M copies of data packets are transmitted via H network devices connected to the terminal device, and each of the H network devices transmits at least one of the M copies of data packets, wherein both M and H are integers greater than or equal to 2, and H is less than M;
in the fifth mode, a data packet is not duplicated at a PDCP layer, and the data packet is transmitted to a network device connected to the terminal device;
and
when the changed transmission mode indicated by the first indication information is the fifth mode, determining to use a split transmission mode after the transmission mode changes, wherein the split transmission mode is a mode in which the terminal device determines, based on a first data volume threshold, to transmit data packets to a network device.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/366,938Filed 2 Jul 2021 · continuation
Priority: CN 201910005020.03 Jan 2019
Published: US 2021/0336717 A128 Oct 2021
Granted: 7 Jan 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 1/0006
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the transmission format
H04L 1/08
Arrangements for detecting or preventing errors in the information received: by repeating transmission, e.g. Verdan system
H04L 1/1812
Automatic repetition systems, e.g. Van Duuren systems: hybrid protocols; Hybrid automatic repeat request [HARQ]
H04L 1/1825
Automatic repetition systems, e.g. Van Duuren systems: adaptation of specific ARQ protocol parameters according to transmission conditions

Family

PCT/CN2019/129299Parent of this continuation · filed 27 Dec 2019
US 2021/0336717 A1Pre-grant publication · published 28 Oct 2021
US 12,191,989 B2This patent

From the US filing history. Foreign family members aren’t listed.

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