Granted Patent B2

US 12,625,838 · App. 18/783,056 · Granted May 12, 2026

Inventor: Er Nie (Shenzhen, CN)

Assignee: Huawei Technologies Co., Ltd

G06F13/4282G06F13/4027H04L47/283

Abstract

Claims (61)

1 . A retimer path control method for wired serial data transmission, wherein the method comprises:

receiving, by a path control apparatus, a first bitstream, wherein the first bitstream comprises a first field, wherein the first field comprises capability information of a retimer, and wherein the capability information indicates whether the retimer supports a low latency path; and

sending, by the path control apparatus, a second bitstream to the retimer, wherein the second bitstream comprises a second field, wherein the second field comprises first enter control information, wherein the first enter control information indicates whether the retimer is to enter the low latency path, and wherein the low latency path is a path with lowest latency in data transmission paths of the retimer;

wherein the second bitstream further comprises a fifth field, wherein the fifth field carries state information, and wherein the state information indicates whether the retimer has entered the low latency path or has exited the low latency path.

2 . The method according to claim 1 , wherein the second field further comprises first exit control information, and the first exit control information indicates whether the retimer is to exit the low latency path.

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

sending a third bitstream to the retimer, wherein the third bitstream comprises a third field, and the third field carries the capability information.

4 . The method according to claim 3 , further comprising:

receiving a fourth bitstream, wherein the fourth bitstream comprises a fourth field, wherein the fourth field comprises second enter control information and second exit control information, wherein the second enter control information indicates whether the retimer is to enter the low latency path, and wherein the second exit control information indicates whether the retimer is to exit the low latency path.

5 . The method according to claim 4 , wherein the fourth bitstream further comprises a sixth field, and the sixth field comprises the state information.

6 . The method according to claim 5 , further comprising:

sending service data to a peer device through the retimer based on determining, based on the state information, that the retimer has not entered the low latency path or has exited the low latency path.

7 . The method according to claim 4 , wherein the first bitstream further comprises a seventh field, wherein the seventh field comprises duration information, and wherein the duration information indicates a consumed duration for the retimer to enter or exit the low latency path.

8 . The method according to claim 7 , wherein after sending the second bitstream to the retimer, the method further comprises:

determining a waiting duration based on the duration information; and

sending service data to a peer device through the retimer based on a first quantity of fourth bitstreams being received after the waiting duration following a start moment.

9 . The method according to claim 4 , further comprising:

sending a fifth bitstream to the retimer, wherein the fifth bitstream comprises an eighth field, wherein the eighth field comprises first enable information, and wherein the first enable information indicates whether the retimer is to enable the low latency path.

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

receiving a sixth bitstream, wherein the sixth bitstream comprises a ninth field, wherein the ninth field comprises second enable information, and wherein the second enable information indicates whether to enable the low latency path.

11 . The method according to claim 10 , wherein the method further comprises:

based on the second enable information being different from the first enable information, updating the first enable information based on the second enable information, to obtain updated first enable information, wherein the updated first enable information is the same as the second enable information; and

sending an updated fifth bitstream to the retimer, wherein the updated fifth bitstream comprises an updated first enable field, and the updated first enable field comprises the updated first enable information.

12 . A retimer path control method for wired serial data transmission, wherein the method comprises:

receiving, by a path control apparatus, a first bitstream from a first device, wherein the first bitstream comprises a first field;

writing, by the path control apparatus, capability information into the first field to obtain a second bitstream, wherein the capability information indicates whether a retimer supports a low latency path, and the low latency path is a path with lowest latency in data transmission paths of the retimer;

sending, by the path control apparatus, the second bitstream to a second device;

receiving, by the path control apparatus, a third bitstream sent by the second device, wherein the third bitstream comprises a second field, and the second field comprises first enter control information and first exit control information;

determining, by the path control apparatus, based on the first enter control information, whether to enter the low latency path; and

determining, by the path control apparatus, based on the first exit control information, whether to exit the low latency path;

wherein the method further comprises:

receiving, by the path control apparatus, a fourth bitstream from the second device, wherein the fourth bitstream comprises a third field;

writing, by the path control apparatus, the capability information into the third field to obtain a fifth bitstream;

sending, by the path control apparatus, the fifth bitstream to the first device; and

receiving, by the path control apparatus, a sixth bitstream sent by the first device, wherein the sixth bitstream comprises a fourth field, and the fourth field comprises second enter control information;

wherein determining whether to enter the low latency path is further based on the second enter control information.

13 . The method according to claim 12 , wherein the fourth field further comprises second exit control information; and

wherein determining whether to exit the low latency path comprises is further based on the second exit control information.

14 . The method according to claim 12 , wherein the third bitstream further comprises a fifth field, wherein the sixth bitstream further comprises a sixth field, and wherein the method further comprises:

writing state information into the fifth field to obtain a seventh bitstream, wherein the state information indicates whether the retimer has entered the low latency path or has exited the low latency path;

sending the seventh bitstream to the first device;

writing the state information into the sixth field to obtain an eighth bitstream; and

sending the eighth bitstream to the second device.

15 . The method according to claim 12 , wherein the first bitstream further comprises a seventh field, and the fourth bitstream further comprises an eighth field;

wherein obtaining the second bitstream further comprises: writing duration information into the seventh field, wherein the duration information indicates a consumed duration for the retimer to enter or exit the low latency path; and

wherein obtaining the fifth bitstream further comprises: writing the duration information into the eighth field.

16 . The method according to claim 12 , further comprising:

receiving a ninth bitstream from the second device, wherein the ninth bitstream comprises a ninth field, and the ninth field comprises first enable information; and

determining, based on the first enable information, whether to enable the low latency path.

17 . A path control apparatus for wired serial data transmission, comprising:

one or more processors; and

a memory, configured to store one or more computer programs or instructions;

wherein execution of the one or more computer programs or the instructions by the one or more processors facilitates performance of the following by the path control apparatus:

receiving a first bitstream, wherein the first bitstream comprises a first field, wherein the first field comprises capability information of a retimer, and wherein the capability information indicates whether the retimer supports a low latency path; and

sending a second bitstream to the retimer, wherein the second bitstream comprises a second field, wherein the second field comprises first enter control information, wherein the first enter control information indicates whether the retimer is to enter the low latency path, and wherein the low latency path is a path with lowest latency in data transmission paths of the retimer;

wherein the second bitstream further comprises a fifth field, wherein the fifth field carries state information, and wherein the state information indicates whether the retimer has entered the low latency path or has exited the low latency path.

18 . The path control apparatus according to claim 17 , wherein the second field further comprises first exit control information, and the first exit control information indicates whether the retimer is to exit the low latency path.

19 . The path control apparatus according to claim 17 , wherein execution of the one or more computer programs or the instructions by the one or more processors further facilitates performance of the following by the path control apparatus:

sending a third bitstream to the retimer, wherein the third bitstream comprises a third field, and the third field carries the capability information.

20 . The path control apparatus according to claim 17 , wherein execution of the one or more computer programs or the instructions by the one or more processors further facilitates performance of the following by the path control apparatus:

receiving a fourth bitstream, wherein the fourth bitstream comprises a fourth field, wherein the fourth field comprises second enter control information and second exit control information, wherein the second enter control information indicates whether the retimer is to enter the low latency path, and wherein the second exit control information indicates whether the retimer is to exit the low latency path.

Assignments (1)

Continuity (2)

References Cited (31)