SCG-side service processing method and apparatus in dual connectivity scenario

Patent metadata

Field	Value
Publication number	US-12004036-B2
Application number	US-202017605113-A
Country	US
Kind code	B2
Filing date	Apr 24, 2020
Priority date	Apr 30, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A secondary cell group (SCG) side service processing method includes a master base station that configures a master cell group and an SCG for a terminal device. In uplink and downlink data transmission processes, when link quality information of a serving cell in the SCG meets a first preset condition, the terminal device obtains link quality information of a neighboring cell of the serving cell, determines, based on the link quality information, whether there is a better neighboring cell, and when there is no better neighboring cell, sends a first message to the master base station to enable the master base station to determine, based on the first message, whether to release the SCG.

First claim

The invention claimed is:

1. A method comprising:
establishing dual connections to a master base station and a secondary base station;
obtaining first link quality information of a serving cell in a secondary cell group (SCG);
obtaining second link quality information of a neighboring cell of the serving cell when the first link quality information meets a first preset condition;
generating a first message when the second link quality information does not meet a second preset condition, wherein the first message carries third link quality information that is based on the first link quality information;
sending the first message to the master base station to enable the master base station to process a service on the SCG based on the first message;
generating a second message when the second link quality information meets the second preset condition, wherein the second message carries fourth link quality information that is based on the second link quality information; and
sending the second message to the master base station.

2. The method of claim 1 , wherein the first link quality information comprises one or more:
a quantity of starting times of a timer T313 corresponding to a cell in the SCG;
a running duration of a timer T313 corresponding to a cell in the SCG;
a quantity of out-of-synchronization (out of sync) events in a cell in the SCG;
a throughput of data transmitted in a cell in the SCG;
a ratio of the throughput to a power consumption amount;
a quantity of beam failures triggered in a cell in the SCG;
an amount of data buffered at a radio link control (RLC) layer corresponding to a cell in the SCG;
a latency of uplink data sent on a link in a cell in the SCG;
a signal strength of a cell in the SCG;
a signal strength change amplitude of a cell in the SCG;
a retransmission rate of data transmitted on a link in a cell in the SCG;
a signal-to-interference-plus-noise ratio (SINR) of a cell in the SCG;
a modulation and coding scheme (MCS) index corresponding to a cell in the SCG; or
a block error rate (BLER) in sending downlink data or receiving uplink data in a cell in the SCG.

3. The method of claim 1 , wherein the second link quality information comprises at least one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal to interference plus noise ratio (SINR), a load, a priority, or availability.

4. The method of claim 1 , wherein the second message comprises an A3 measurement report, an A4 measurement report, or an A5 measurement report.

5. The method of claim 1 , wherein after sending the second message to the master base station, the method further comprises receiving a handover message instructing the terminal device to perform a handover from the serving cell to the neighboring cell.

6. The method of claim 1 , wherein the first message comprises an A2 measurement report.

7. The method of claim 1 , wherein after sending the first message to the master base station, the method further comprises:
receiving, from the master base station, a release message instructing the terminal device to release the SCG; and
releasing the SCG based on the release message.

8. A terminal device comprising:
a memory configured to store one or more computer programs; and
one or more processors coupled to the memory and configured to execute the one or more computer programs to cause the terminal device to:
establish dual connections to a master base station and a secondary base station;
obtain first link quality information of a serving cell in a secondary cell group (SCG);
obtain second link quality information of a neighboring cell of the serving cell when the first link quality information meets a first preset condition;
generate a first message when the second link quality information does not meet a second preset condition, wherein the first message carries third link quality information that is based on the first link quality information;
send the first message to the master base station to enable the master base station to process a service on the SCG based on the first message;
generate a second message when the second link quality information meets the second preset condition, wherein the second message carries fourth link quality information that is based on the second link quality information; and
send the second message to the master base station.

9. The terminal device of claim 8 , wherein the first link quality information comprises one or more of:
a quantity of starting times of a timer T313 corresponding to a cell in the SCG;
a running duration of a timer T313 corresponding to a cell in the SCG;
a quantity of out-of-synchronization (out of sync) events in a cell in the SCG;
a throughput of data transmitted in a cell in the SCG;
a ratio of a throughput of data transmitted in a cell in the SCG to a power consumption amount;
a quantity of beam failures triggered in a cell in the SCG;
an amount of data buffered at a radio link control (RLC) layer corresponding to a cell in the SCG;
a latency of uplink data sent on a link in a cell in the SCG;
a signal strength of a cell in the SCG;
a signal strength change amplitude of a cell in the SCG;
a retransmission rate of data transmitted on a link in a cell in the SCG;
a signal to interference plus noise ratio (SINR) of a cell in the SCG;
a modulation and coding scheme (MCS) index corresponding to a cell in the SCG; or
a block error rate (BLER) in sending downlink data or receiving uplink data in a cell in the SCG.

10. The terminal device of claim 8 , wherein the second link quality information comprises at least one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal to interference plus noise ratio (SINR), a load, a priority, or availability.

11. The terminal device of claim 8 , wherein the second message comprises an A3 measurement report, an A4 measurement report, or an A5 measurement report.

12. The terminal device of claim 8 , wherein after sending the second message to the master base station, the one or more processors is further configured to execute the one or more computer programs to cause the terminal device to receive, from the master base station, a handover message instructing the terminal device to perform a handover from the serving cell to the neighboring cell.

13. The terminal device of claim 8 , wherein the first message comprises an A2 measurement report.

14. The terminal device of claim 8 , wherein the one or more processors is further configured to execute the one or more computer programs to cause the terminal device to:
receive a release message instructing the terminal device to release the SCG; and
release the SCG based on the release message.

15. A computer program product comprising computer-executable instructions stored on a non-transitory computer-readable medium and that, when executed by one or more processors, cause a terminal device to:
establish dual connections to a master base station and a secondary base station;
obtain first link quality information of a serving cell in a secondary cell group (SCG);
obtain second link quality information of a neighboring cell of the serving cell when the first link quality information meets a first preset condition;
generate a first message when the second link quality information does not meet a second preset condition, wherein the first message carries third link quality information that is based on the first link quality information;
send the first message to the master base station to enable the master base station to process a

Assignees

• Huawei Tech Co Ltd

Inventors

• Li Xiaoxian
• Dou Fenghui

Classifications

• H04W36/304

  due to measured or perceived resources with higher communication quality · CPC title

• H04W36/08

  Reselecting an access point · CPC title

• H04W36/0069 Primary

  in case of dual connectivity, e.g. decoupled uplink/downlink · CPC title

• H04W36/30 Primary

  by measured or perceived connection quality data · CPC title

• H04W36/0058

  Transmission of hand-off measurement information, e.g. measurement reports · CPC title