US 9,866,243 B2Granted

Forward error correction codeword synchronization method, device, and system

AssigneeHuawei Technologies Co., Ltd.

InventorFanglin Sun

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Abstract

Embodiments of the present invention provide a forward error correction codeword synchronization method, device, and system. The method is: sending, by a central office device, synchronization information of an FEC codeword to a terminal device by using a management channel, where the information includes information about an agreed location of an FEC codeword, and the information about the agreed location of the first FEC codeword indicates a location that is of the first FEC codeword and is corresponding to data at an agreed location of an agreed time-frequency resource block; and receiving, by the terminal device, the synchronization information that is of the FEC codeword and is sent by the central office device, and adjusting a status parameter of an encoder or a decoder according to the information, so as to complete codeword synchronization. The embodiments of the present invention are used for FEC codeword synchronization.

Claims15

Dependent claims

A forward error correction codeword synchronization method, the method comprising:

after a terminal device initiates an access or registration request to a central office device, receiving synchronization information of a first forward error correction (FEC) codeword sent by the central office device by using a management channel, wherein the synchronization information comprises information about a location, agreed to by the terminal device and the central office device, of the first FEC codeword and corresponding to data at a location, agreed to by the terminal device and the central office device, of a time-frequency resource block agreed to by the terminal device and the central office device;
resetting a status parameter of a terminal decoder according to the synchronization information of the first FEC codeword, wherein the terminal decoder starts decoding from the location of the first FEC codeword, or resetting a status parameter of a terminal encoder according to the synchronization information of the first FEC codeword, wherein the location of a FEC codeword output by the terminal encoder and corresponding to the data at the location of the time-frequency resource block is the same as the location of the first FEC codeword;
when the location of the FEC codeword input by the terminal decoder and corresponding to the data at the location of the time-frequency resource block is different from the location of the first FEC codeword:
sending a resynchronization request message to the central office device,
receiving the synchronization information of the first FEC codeword and resent by the central office device by using the management channel, and
resetting status data of the terminal encoder, wherein the location of the FEC codeword output by the terminal encoder and corresponding to the data at the location of the time-frequency resource block is the same as the location of the first FEC codeword.

3 more elements

A forward error correction (FEC) codeword synchronization method, the method comprising:

after a terminal device initiates an access or registration request to a central office device, sending synchronization information of a first FEC codeword to the terminal device using a management channel, wherein the synchronization information comprises information about a location, agreed to by the terminal device and the central office device, of the first FEC codeword and corresponding to data at a location, agreed to by the terminal device and the central office device, of a time-frequency resource block agreed to by the terminal device and the central office device;
when the location of the FEC codeword input by a terminal decoder and corresponding to the data at the location of the time-frequency resource block is different from the location of the first FEC codeword:
receiving a resynchronization request sent by the terminal device, and
resending the synchronization information of the first FEC codeword to the terminal device by using the management channel.

1 more element

A terminal device, comprising:

an encoder;
a decoder
a receiver, configured to, after the terminal device initiates an access or registration request to a central office device:
receive synchronization information that is of a first forward error correction (FEC) codeword sent by the central office device by using a management channel, wherein the synchronization information comprises information about a location, agreed to by the terminal device and the central office device, of the first FEC codeword and corresponding to data at a location, agreed to by the terminal device and the central office device, of a time-frequency resource block agreed to by the terminal device and the central office device, and
receive the synchronization information of the first FEC codeword and resent by the central office device by using the management channel;
a transmitter, configured to send a resynchronization request message to the central office device;
and
at least one processor configured to execute instructions stored in at least one non-transitory memory to configure the terminal device to:
reset a status parameter of the decoder according to the synchronization information of the first FEC codeword, wherein the decoder starts decoding from the location of the first FEC codeword, or
reset a status parameter of the encoder according to the synchronization information of the first FEC codeword, wherein the location of a FEC codeword output by the encoder and corresponding to the data at the location of the time-frequency resource block is the same as the location of the first FEC codeword, and
reset status data of the encoder, wherein the location of the FEC codeword output by the encoder and corresponding to the data at the location of the time-frequency resource block is the same as the location of the first FEC codeword.

8 more elements

A central office device, comprising:

a transmitter, configured to, after a terminal device initiates an access or registration request to the central office device, send synchronization information of a first forward error correction (FEC) codeword to the terminal device using a management channel, wherein the synchronization information comprises information about a location, agreed to by the terminal device and the central office device, of the first FEC codeword and corresponding to data at a location, agreed to by the terminal device and the central office device, of a time-frequency resource block agreed to by the terminal device and the central office device;
and
a receiver, configured to receive a resynchronization request sent by the terminal device when the location of the FEC codeword input by a terminal decoder and corresponding to the data at the location of the time-frequency resource block is different from the location of the first FEC codeword;
wherein the transmitter is further configured to resend the synchronization information of the first FEC codeword to the terminal device by using the management channel.

1 more element

A forward error correction codeword synchronization system, comprising:

a terminal device, configured to, after the terminal device initiates an access or registration request to a central office device:
receive synchronization information that is of a first forward error correction (FEC) codeword sent by the central office device by using a management channel, wherein the synchronization information comprises information about a location, agreed to by the terminal device and the central office device, of the first FEC codeword and corresponding to data at a location, agreed to by the terminal device and the central office device, of a time-frequency resource block agreed to by the terminal device and the central office device;
reset a status parameter of a terminal decoder according to the synchronization information of the first FEC codeword, or reset a status parameter of a terminal encoder according to the synchronization information of the first FEC codeword;
send a resynchronization request message to the central office device;
receive the synchronization information of the first FEC codeword and resent by the central office device by using the management channel;
and
reset status data of the terminal encoder, wherein the location of the FEC codeword output by the terminal encoder and corresponding to the data at the location of the time-frequency resource block is the same as the location of the first FEC codeword;
and
the central office device, configured to, after the terminal device initiates the access or registration request to the central office device:
send synchronization information of the first FEC codeword to the terminal device by using a management channel;
receive a resynchronization request sent by the terminal device, when the location of the FEC codeword input by a terminal decoder and corresponding to the data at the location of the time-frequency resource block is different from the location of the first FEC codeword;
and
resend the synchronization information of the first FEC codeword to the terminal device by using the management channel.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/836,597Filed 26 Aug 2015 · continuation
Priority: 1 Mar 2013
Published: US 2015/0365109 A117 Dec 2015
Granted: 9 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H03M 13/33
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability…:…
H03M 13/11
Using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits: using multiple parity bits
H03M 13/611
Aspects and characteristics of methods and arrangements for error correction or error detection, not provided for otherwise: specific encoding…
H03M 13/613
Aspects and characteristics of methods and arrangements for error correction or error detection, not provided for otherwise: use of the dual code