CN112947271B - PLC substation wireless control method and system based on Internet of things - Google Patents

PLC substation wireless control method and system based on Internet of things Download PDF

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Publication number
CN112947271B
CN112947271B CN202110107984.3A CN202110107984A CN112947271B CN 112947271 B CN112947271 B CN 112947271B CN 202110107984 A CN202110107984 A CN 202110107984A CN 112947271 B CN112947271 B CN 112947271B
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time slot
mobile terminal
control command
station
plc
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CN112947271A (en
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徐德成
王欣
吴辉
史小雨
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Beijing Dayuan Environmental Protection Technology Co ltd
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Beijing Dayuan Environmental Protection Technology Co ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/058—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14006—Safety, monitoring in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a PLC substation wireless control method based on the Internet of things, which comprises the following steps: generating a PLC substation control command by a PLC control center server; in response to generating the PLC substation control command, the PLC control center server transmits the PLC substation control command to the base station; in response to receiving the PLC sub-station control command, the base station judges whether the PLC sub-station control command is to be sent to the mobile terminal in one time slot or in two time slots; if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, the base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot; receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station at a second set of symbols of the first slot in response to receiving the first downlink control message; and in response to receiving the PLC substation control command, transmitting ACK information to the base station by the mobile terminal in the first symbol set of the second time slot.

Description

PLC substation wireless control method and system based on Internet of things
Technical Field
The invention relates to the technical field of controllable redundant PLC (programmable logic controller), in particular to a PLC substation wireless control method and system based on the Internet of things.
Background
Sludge is a necessary product after sewage treatment of a sewage treatment plant and a sewage station, and after the sludge which is not well treated enters the environment, secondary pollution can be directly brought to water, the environment and the atmosphere, and serious threat to ecological environment and human activities can be formed. The sewage treatment is a process for purifying sewage to meet the water quality requirement of being discharged into a certain water body or reused. The sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy sources, petrifaction, environmental protection, urban landscapes, medical treatment, catering and the like, and the sewage treatment is increasingly carried into the daily life of common people.
The controllable redundant PLC technology has important application in sewage treatment. The prior art CN108551397B discloses a network bridge device and application and a communication control method of a multi-PLC master station and a multi-PLC slave station, wherein the device is provided with a plurality of interfaces for communicating with the PLC master station and a plurality of interfaces for communicating with the PLC slave station, and comprises a PLC master station input optimization module, a PLC master station state monitoring module, a PLC slave station input optimization module and a PLC slave station state monitoring module; the PLC master station input optimization module optimizes one output from a plurality of master station inputs to the slave station; the PLC master station state monitoring module monitors each master station according to the input data of the multiple master stations and stops the data forwarding of the master station when monitoring that a certain master station is abnormal; the PLC slave input preference module preferably outputs one of a plurality of slave inputs to a normally operating master station.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a PLC substation wireless control method and system based on the Internet of things, which can overcome the defects of the prior art.
In order to achieve the above purpose, the invention provides a PLC substation wireless control method based on the Internet of things, which comprises the following steps:
generating a PLC substation control command by a PLC control center server;
in response to generating the PLC substation control command, the PLC control center server transmits the PLC substation control command to the base station;
in response to receiving the PLC sub-station control command, the base station judges whether the PLC sub-station control command is to be sent to the mobile terminal in one time slot or in two time slots;
if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, the base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot;
receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in a second set of symbols of the first slot in response to receiving the first downlink control message, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message;
Transmitting, by the mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols of a second time slot, wherein the second time slot is spaced apart from the first time slot by two time slots, wherein the first set of symbols of the second time slot includes a first symbol of the second time slot, wherein resources for transmitting the ACK information are indicated in a first downlink control message;
if the PLC substation control command is judged to be sent to the mobile terminal in two time slots, a first downlink control message is sent to the mobile terminal by the base station in a first symbol set of a first time slot, and a second downlink control message is sent to the mobile terminal by the base station in a first symbol set of a third time slot, wherein the third time slot is a time slot immediately following the first time slot;
receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message;
receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message;
In response to receiving a portion of the PLC sub-station control command and receiving the remaining portion of the PLC sub-station control command, first ACK information and second ACK information are transmitted by the mobile terminal to the base station in a second set of symbols of a second slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information.
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps:
in response to receiving a portion of the PLC sub-station control command and not receiving the remaining portion of the PLC sub-station control command, transmitting, by the mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced apart from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information;
In response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, transmitting, by the mobile terminal, first ACK information to the base station at a first set of symbols of a second time slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second time slot is separated from the first time slot by two time slots, wherein the first set of symbols of the second time slot includes the first symbol of the second time slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps:
transmitting, by the mobile terminal, NACK information to the base station in a second set of symbols of a second slot in response to not receiving the first downlink control message and receiving the remaining portion of the PLC sub-station control command, wherein the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced apart from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in the second downlink control message;
If the PLC substation control command is judged to be sent to the mobile terminal in one time slot, the base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot;
after sending the PLC sub-station control command to the mobile terminal, if the base station receives the second PLC sub-station control command sent by the PLC control center server again, the base station sends a third downlink control message to the mobile terminal in a second symbol set of a third time slot, wherein the third time slot is a time slot immediately following the first time slot;
in response to receiving the PLC sub-station control command, preparing, by the mobile terminal, to transmit ACK information to the base station at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes the first symbol for the fourth time slot, wherein resources for transmitting the ACK information are indicated in the first downlink control message;
before sending the ACK information to the base station, judging by the mobile terminal whether the mobile terminal has decoded the third downlink control message;
if the mobile terminal is judged not to decode the third downlink control message, the mobile terminal sends ACK information to the base station in the first symbol set of the fourth time slot;
If it is determined that the mobile terminal did not decode the third downlink control message and in response to receiving the second PLC sub-station control command, third ACK information is transmitted by the mobile terminal to the base station in a second set of symbols of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps:
if the mobile terminal is judged to have decoded the third downlink control message, judging whether a second PLC substation control command is received by the mobile terminal;
if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, first ACK information to the base station in a second set of symbols of a fourth time slot, wherein the first ACK information is feedback for the PLC sub-station control command, and third ACK information to the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps:
in response to not receiving the PLC sub-station control command, preparing, by the mobile terminal, to transmit NACK information to the base station at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes the first symbol for the fourth time slot, wherein resources for transmitting the NACK information are indicated in the first downlink control message;
before transmitting NACK information to the base station, judging by the mobile terminal whether the mobile terminal has decoded the third downlink control message;
if the mobile terminal is judged not to decode the third downlink control message, the mobile terminal sends NACK information to the base station in the first symbol set of the fourth time slot;
if it is determined that the mobile terminal did not decode the third downlink control message and in response to not receiving the second PLC sub-station control command, transmitting, by the mobile terminal, second NACK information to the base station in a second set of symbols for a fourth time slot, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols for the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols for the fourth time slot is indicated in the third downlink control message.
The invention also provides a PLC substation wireless control system based on the Internet of things, which comprises:
a unit for generating a PLC sub-station control command by the PLC control center server;
a unit for transmitting the PLC sub-station control command to the base station by the PLC control center server in response to generating the PLC sub-station control command;
a unit for determining, by the base station, whether the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot or to the mobile terminal in two time slots in response to receiving the PLC sub-station control command;
means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot;
means for receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in response to receiving the first downlink control message at the second set of symbols of the first time slot, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message;
means for transmitting, by the mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols of a second time slot, wherein the second time slot is spaced apart from the first time slot by two time slots, wherein the first set of symbols of the second time slot comprises a first symbol of the second time slot, wherein resources for transmitting the ACK information are indicated in a first downlink control message;
Means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols in a first time slot and transmitting, by the base station, a second downlink control message to the mobile terminal in a first set of symbols in a third time slot, wherein the third time slot is a time slot immediately following the first time slot, if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in both time slots;
means for receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message;
means for receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message;
and means for transmitting, by the mobile terminal, first ACK information and second ACK information to the base station in a second set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and the remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information.
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises:
transmitting, by the mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and not receiving the remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command and the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information;
and means for transmitting, by the mobile terminal, first ACK information to the base station in a first set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second slot is separated from the first slot by two slots, wherein the first set of symbols of the second slot includes the first symbol of the second slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises:
means for transmitting, by the mobile terminal, NACK information to the base station in a second set of symbols of a second time slot in response to not receiving the first downlink control message and receiving the remainder of the PLC sub-station control command, wherein the NACK information is feedback for the remainder of the PLC sub-station control command, the second time slot being spaced from the first time slot by two time slots, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message;
means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot;
means for transmitting, by the base station, a third downlink control message to the mobile terminal at a second symbol set of a third time slot if the base station receives again a second PLC sub-station control command transmitted by the PLC control center server after transmitting the PLC sub-station control command to the mobile terminal, wherein the third time slot is a time slot immediately following the first time slot;
Means for preparing, by the mobile terminal, to transmit ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes a first symbol for the fourth time slot, wherein resources for transmitting the ACK information are indicated in the first downlink control message;
means for determining, by the mobile terminal, whether the mobile terminal has decoded the third downlink control message before sending the ACK information to the base station;
means for transmitting, by the mobile terminal, ACK information to the base station at the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal;
and if it is determined that the mobile terminal did not decode the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, third ACK information to the base station at a second set of symbols of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises:
means for determining, by the mobile terminal, whether a second PLC sub-station control command is received if it is determined that the mobile terminal has decoded the third downlink control message;
and means for transmitting, by the mobile terminal, first ACK information and third ACK information to the base station in a second symbol set of a fourth slot if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, wherein the first ACK information is feedback for the PLC sub-station control command and the third ACK information is feedback for the second PLC sub-station control command, wherein the fourth slot is a slot immediately following the third slot, wherein the second symbol set of the fourth slot includes a last symbol of the fourth slot, wherein the second symbol set of the fourth slot is indicated in the third downlink control message.
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises:
means for preparing, by the mobile terminal, to transmit NACK information to the base station in response to not receiving the PLC sub-station control command at a first set of symbols of a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols of the fourth time slot includes a first symbol of the fourth time slot, wherein resources for transmitting NACK information are indicated in the first downlink control message;
Means for determining, by the mobile terminal, whether the mobile terminal has decoded the third downlink control message before transmitting the NACK information to the base station;
means for transmitting, by the mobile terminal, NACK information to the base station in the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal;
and means for transmitting, by the mobile terminal, second NACK information to the base station in a second set of symbols for a fourth time slot if it is determined that the third downlink control message was not decoded by the mobile terminal and in response to not receiving the second PLC sub-station control command, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols for the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols for the fourth time slot is indicated in the third downlink control message.
Compared with the prior art, the invention has the following advantages: the PLC slave station (or a sub-station) is an important device in the field of sewage treatment, and has important significance for realizing sewage treatment. At present, the control of the PLC sub-station is performed by using a specially established network, and the deployment mode leads to high deployment cost, slow deployment speed and slow system updating speed of the PLC control system.
Drawings
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.
FIG. 2 is a flow chart of a method according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Example 1
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention. Those skilled in the art will appreciate that the mobile terminal, upon receiving the PLC substation control command, also needs to send the relevant command to the PLC substation.
FIG. 2 is a flow chart of a method according to an embodiment of the invention. As shown in the figure, the PLC substation wireless control method based on the Internet of things comprises the following steps:
step 101: generating a PLC substation control command by a PLC control center server;
step 102: in response to generating the PLC substation control command, the PLC control center server transmits the PLC substation control command to the base station;
Step 103: in response to receiving the PLC sub-station control command, the base station judges whether the PLC sub-station control command is to be sent to the mobile terminal in one time slot or in two time slots;
step 104: if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, the base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot;
step 105: receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in a second set of symbols of the first slot in response to receiving the first downlink control message, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message;
step 106: transmitting, by the mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols of a second time slot, wherein the second time slot is spaced apart from the first time slot by two time slots, wherein the first set of symbols of the second time slot includes a first symbol of the second time slot, wherein resources for transmitting the ACK information are indicated in a first downlink control message; it will be appreciated by those skilled in the art that the first set of symbols of the second slot including the first symbol of the second slot means that the first set of symbols is located at the beginning of the second slot;
Step 107: if the PLC substation control command is judged to be sent to the mobile terminal in two time slots, a first downlink control message is sent to the mobile terminal by the base station in a first symbol set of a first time slot, and a second downlink control message is sent to the mobile terminal by the base station in a first symbol set of a third time slot, wherein the third time slot is a time slot immediately following the first time slot;
step 108: receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message;
step 109: receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message;
step 110: in response to receiving a portion of the PLC sub-station control command and receiving the remaining portion of the PLC sub-station control command, first ACK information and second ACK information are transmitted by the mobile terminal to the base station in a second set of symbols of a second slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information. It will be appreciated by those skilled in the art that the second set of symbols of the second slot including the last symbol of the second slot means that the second set of symbols is located at the end of the second slot.
In the scheme, the PLC substation wireless control method based on the Internet of things comprises the following steps of: in response to receiving a portion of the PLC sub-station control command and not receiving the remaining portion of the PLC sub-station control command, transmitting, by the mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced apart from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information; in response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, transmitting, by the mobile terminal, first ACK information to the base station at a first set of symbols of a second time slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second time slot is separated from the first time slot by two time slots, wherein the first set of symbols of the second time slot includes the first symbol of the second time slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps: transmitting, by the mobile terminal, NACK information to the base station in a second set of symbols of a second slot in response to not receiving the first downlink control message and receiving the remaining portion of the PLC sub-station control command, wherein the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced apart from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in the second downlink control message; if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, the base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot; after sending the PLC sub-station control command to the mobile terminal, if the base station receives the second PLC sub-station control command sent by the PLC control center server again, the base station sends a third downlink control message to the mobile terminal in a second symbol set of a third time slot, wherein the third time slot is a time slot immediately following the first time slot; in response to receiving the PLC sub-station control command, preparing, by the mobile terminal, to transmit ACK information to the base station at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes the first symbol for the fourth time slot, wherein resources for transmitting the ACK information are indicated in the first downlink control message; before sending the ACK information to the base station, judging by the mobile terminal whether the mobile terminal has decoded the third downlink control message; if the mobile terminal is judged not to decode the third downlink control message, the mobile terminal sends ACK information to the base station in the first symbol set of the fourth time slot; if it is determined that the mobile terminal did not decode the third downlink control message and in response to receiving the second PLC sub-station control command, third ACK information is transmitted by the mobile terminal to the base station in a second set of symbols of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
Example 2
In a preferred embodiment, the method for wirelessly controlling the PLC substation based on the internet of things comprises the following steps: if the mobile terminal is judged to have decoded the third downlink control message, judging whether a second PLC substation control command is received by the mobile terminal; if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, first ACK information to the base station in a second set of symbols of a fourth time slot, wherein the first ACK information is feedback for the PLC sub-station control command, and third ACK information to the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
Further, the PLC substation wireless control method based on the Internet of things comprises the following steps: in response to not receiving the PLC sub-station control command, preparing, by the mobile terminal, to transmit NACK information to the base station at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes the first symbol for the fourth time slot, wherein resources for transmitting the NACK information are indicated in the first downlink control message; before transmitting NACK information to the base station, judging by the mobile terminal whether the mobile terminal has decoded the third downlink control message; if the mobile terminal is judged not to decode the third downlink control message, the mobile terminal sends NACK information to the base station in the first symbol set of the fourth time slot; if it is determined that the mobile terminal did not decode the third downlink control message and in response to not receiving the second PLC sub-station control command, transmitting, by the mobile terminal, second NACK information to the base station in a second set of symbols for a fourth time slot, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols for the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols for the fourth time slot is indicated in the third downlink control message.
Example 3
The invention provides a PLC substation wireless control system based on the Internet of things, which comprises: a unit for generating a PLC sub-station control command by the PLC control center server; a unit for transmitting the PLC sub-station control command to the base station by the PLC control center server in response to generating the PLC sub-station control command; a unit for determining, by the base station, whether the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot or to the mobile terminal in two time slots in response to receiving the PLC sub-station control command; means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot; means for receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in response to receiving the first downlink control message at the second set of symbols of the first time slot, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message; means for transmitting, by the mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols of a second time slot, wherein the second time slot is spaced apart from the first time slot by two time slots, wherein the first set of symbols of the second time slot comprises a first symbol of the second time slot, wherein resources for transmitting the ACK information are indicated in a first downlink control message; means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols in a first time slot and transmitting, by the base station, a second downlink control message to the mobile terminal in a first set of symbols in a third time slot, wherein the third time slot is a time slot immediately following the first time slot, if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in both time slots; means for receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message; means for receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message; and means for transmitting, by the mobile terminal, first ACK information and second ACK information to the base station in a second set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and the remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information.
In the above scheme, the PLC substation wireless control system based on the Internet of things comprises: transmitting, by the mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and not receiving the remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command and the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in a second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting the feedback information; and means for transmitting, by the mobile terminal, first ACK information to the base station in a first set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second slot is separated from the first slot by two slots, wherein the first set of symbols of the second slot includes the first symbol of the second slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
Further, the PLC substation wireless control system based on the Internet of things comprises: means for transmitting, by the mobile terminal, NACK information to the base station in a second set of symbols of a second time slot in response to not receiving the first downlink control message and receiving the remainder of the PLC sub-station control command, wherein the NACK information is feedback for the remainder of the PLC sub-station control command, the second time slot being spaced from the first time slot by two time slots, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message; means for transmitting, by the base station, a first downlink control message to the mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot; means for transmitting, by the base station, a third downlink control message to the mobile terminal at a second symbol set of a third time slot if the base station receives again a second PLC sub-station control command transmitted by the PLC control center server after transmitting the PLC sub-station control command to the mobile terminal, wherein the third time slot is a time slot immediately following the first time slot; means for preparing, by the mobile terminal, to transmit ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes a first symbol for the fourth time slot, wherein resources for transmitting the ACK information are indicated in the first downlink control message; means for determining, by the mobile terminal, whether the mobile terminal has decoded the third downlink control message before sending the ACK information to the base station; means for transmitting, by the mobile terminal, ACK information to the base station at the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal; and if it is determined that the mobile terminal did not decode the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, third ACK information to the base station at a second set of symbols of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
Example 4
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises: means for determining, by the mobile terminal, whether a second PLC sub-station control command is received if it is determined that the mobile terminal has decoded the third downlink control message; and means for transmitting, by the mobile terminal, first ACK information and third ACK information to the base station in a second symbol set of a fourth slot if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, wherein the first ACK information is feedback for the PLC sub-station control command and the third ACK information is feedback for the second PLC sub-station control command, wherein the fourth slot is a slot immediately following the third slot, wherein the second symbol set of the fourth slot includes a last symbol of the fourth slot, wherein the second symbol set of the fourth slot is indicated in the third downlink control message.
In a preferred embodiment, the PLC substation wireless control system based on the internet of things comprises: means for preparing, by the mobile terminal, to transmit NACK information to the base station in response to not receiving the PLC sub-station control command at a first set of symbols of a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols of the fourth time slot includes a first symbol of the fourth time slot, wherein resources for transmitting NACK information are indicated in the first downlink control message; means for determining, by the mobile terminal, whether the mobile terminal has decoded the third downlink control message before transmitting the NACK information to the base station; means for transmitting, by the mobile terminal, NACK information to the base station in the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal; and means for transmitting, by the mobile terminal, second NACK information to the base station in a second set of symbols for a fourth time slot if it is determined that the third downlink control message was not decoded by the mobile terminal and in response to not receiving the second PLC sub-station control command, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols for the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols for the fourth time slot is indicated in the third downlink control message.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. The PLC substation wireless control method based on the Internet of things is characterized by comprising the following steps of:
generating a PLC substation control command by a PLC control center server;
in response to generating the PLC substation control command, the PLC control center server transmits the PLC substation control command to the base station;
in response to receiving the PLC substation control command, the base station judges whether the PLC substation control command is to be sent to the mobile terminal in one time slot or in two time slots;
if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, a base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot;
receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in a second set of symbols of a first time slot in response to receiving the first downlink control message, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message;
transmitting, by a mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command in a first set of symbols of a second slot, wherein the second slot is spaced two slots apart from the first slot, wherein the first set of symbols of the second slot includes a first symbol of the second slot, wherein resources for transmitting ACK information are indicated in the first downlink control message;
If the PLC substation control command is judged to be sent to the mobile terminal in two time slots, a first downlink control message is sent to the mobile terminal by a base station in a first symbol set of a first time slot, and a second downlink control message is sent to the mobile terminal by the base station in a first symbol set of a third time slot, wherein the third time slot is a time slot immediately following the first time slot;
receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message;
receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message;
in response to receiving a portion of the PLC sub-station control command and receiving the remaining portion of the PLC sub-station control command, first ACK information and second ACK information are transmitted by a mobile terminal to the base station in a second set of symbols of a second time slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command and the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second time slot being spaced two time slots from the first time slot, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting feedback information.
2. The PLC sub-station wireless control method based on the internet of things according to claim 1, wherein the PLC sub-station wireless control method based on the internet of things comprises the steps of:
in response to receiving a portion of the PLC sub-station control command and not receiving the remaining portion of the PLC sub-station control command, transmitting, by a mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second time slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second time slot being spaced two time slots apart from the first time slot, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting feedback information;
in response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, transmitting, by a mobile terminal, first ACK information to the base station in a first set of symbols of a second time slot, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second time slot is separated from the first time slot by two time slots, wherein the first set of symbols of the second time slot includes a first symbol of the second time slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
3. The PLC sub-station wireless control method based on the internet of things according to claim 2, wherein the PLC sub-station wireless control method based on the internet of things comprises the steps of:
transmitting, by a mobile terminal, NACK information to the base station in a second set of symbols of a second time slot in response to not receiving the first downlink control message and receiving the remaining portion of the PLC sub-station control command, wherein the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second time slot being spaced two time slots apart from the first time slot, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message;
if the PLC substation control command is judged to be sent to the mobile terminal in one time slot, a base station sends a first downlink control message to the mobile terminal in a first symbol set of a first time slot;
after the PLC sub-station control command is sent to the mobile terminal, if the base station receives the second PLC sub-station control command sent by the PLC control center server again, the base station sends a third downlink control message to the mobile terminal in a second symbol set of a third time slot, wherein the third time slot is a time slot immediately after the first time slot;
In response to receiving the PLC sub-station control command, preparing, by a mobile terminal, to transmit ACK information to the base station at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes a first symbol for the fourth time slot, wherein resources for transmitting ACK information are indicated in the first downlink control message;
determining, by a mobile terminal, whether the mobile terminal has decoded the third downlink control message before sending ACK information to the base station;
if the mobile terminal is judged not to decode the third downlink control message, the mobile terminal sends ACK information to the base station in the first symbol set of the fourth time slot;
and if the mobile terminal is judged not to decode the third downlink control message and is in response to receiving the second PLC sub-station control command, transmitting third ACK information to the base station by the mobile terminal in a second symbol set of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second symbol set of the fourth time slot comprises a last symbol of the fourth time slot, wherein the second symbol set of the fourth time slot is indicated in the third downlink control message.
4. The PLC sub-station wireless control method based on the internet of things according to claim 3, wherein the PLC sub-station wireless control method based on the internet of things comprises the steps of:
if the mobile terminal is judged to have decoded the third downlink control message, judging whether the second PLC substation control command is received by the mobile terminal;
if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, first ACK information and third ACK information are transmitted to the base station by the mobile terminal in a second set of symbols of a fourth time slot, wherein the first ACK information is feedback for the PLC sub-station control command and the third ACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
5. The PLC sub-station wireless control method based on the internet of things according to claim 4, wherein the PLC sub-station wireless control method based on the internet of things comprises the steps of:
In response to not receiving the PLC sub-station control command, preparing, by a mobile terminal, to transmit NACK information to the base station in a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes a first symbol of the fourth time slot, wherein resources for transmitting NACK information are indicated in the first downlink control message;
determining, by a mobile terminal, whether the mobile terminal has decoded the third downlink control message before transmitting NACK information to the base station;
if the mobile terminal is judged not to decode the third downlink control message, transmitting NACK information to the base station by the mobile terminal in a first symbol set of a fourth time slot;
and if it is determined that the mobile terminal did not decode the third downlink control message and in response to not receiving the second PLC sub-station control command, transmitting, by the mobile terminal, second NACK information to the base station at a second set of symbols for a fourth time slot, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols for the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols for the fourth time slot is indicated in the third downlink control message.
6. PLC substation wireless control system based on thing networking, its characterized in that, PLC substation wireless control system based on thing networking includes:
a unit for generating a PLC sub-station control command by the PLC control center server;
a unit for transmitting a PLC sub-station control command to a base station by a PLC control center server in response to generating the PLC sub-station control command;
a unit for determining, by the base station, whether the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot or to the mobile terminal in two time slots in response to receiving the PLC sub-station control command;
means for transmitting, by a base station, a first downlink control message to a mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot;
means for receiving, by the mobile terminal, a PLC sub-station control command transmitted by the base station in a second set of symbols of a first time slot in response to receiving the first downlink control message, wherein resources for transmitting the PLC sub-station control command are indicated in the first downlink control message;
means for transmitting, by a mobile terminal, ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols of a second time slot, wherein the second time slot is spaced two time slots apart from the first time slot, wherein the first set of symbols of the second time slot includes a first symbol of the second time slot, wherein resources for transmitting ACK information are indicated in the first downlink control message;
Means for transmitting, by a base station, a first downlink control message to a mobile terminal at a first set of symbols of a first time slot and transmitting, by the base station, a second downlink control message to the mobile terminal at a first set of symbols of a third time slot, if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in two time slots, wherein the third time slot is a time slot immediately following the first time slot;
means for receiving, by the mobile terminal, a portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the first downlink control message, wherein resources for transmitting the portion of the PLC sub-station control command are indicated in the first downlink control message;
means for receiving, by the mobile terminal, a remaining portion of the PLC sub-station control command transmitted by the base station in a second set of symbols of the first time slot in response to receiving the second downlink control message, wherein resources for transmitting the remaining portion of the PLC sub-station control command are indicated in the second downlink control message;
and means for transmitting, by a mobile terminal, first ACK information and second ACK information to the base station in a second set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and receiving a remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command and the second ACK information is feedback for the remaining portion of the PLC sub-station control command, the second slot being spaced from the first slot by two slots, wherein the second set of symbols of the second slot includes a last symbol of the second slot, wherein the second set of symbols of the second slot is indicated in the second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting feedback information.
7. The PLC sub-station wireless control system based on the internet of things of claim 6, wherein the PLC sub-station wireless control system based on the internet of things comprises:
means for transmitting, by a mobile terminal, first ACK information and NACK information to the base station in a second set of symbols of a second time slot in response to receiving a portion of the PLC sub-station control command and not receiving a remaining portion of the PLC sub-station control command, wherein the first ACK information is feedback for the portion of the PLC sub-station control command and the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second time slot being spaced from the first time slot by two time slots, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message, wherein the first downlink control message includes an indication of resources for transmitting feedback information;
and means for transmitting, by a mobile terminal, first ACK information to the base station in a first set of symbols of a second slot in response to receiving a portion of the PLC sub-station control command and not receiving the second downlink control message, wherein the first ACK information is feedback for the portion of the PLC sub-station control command, wherein the second slot is spaced apart from the first slot by two slots, wherein the first set of symbols of the second slot includes the first symbol of the second slot, wherein resources for transmitting the first ACK information are indicated in the first downlink control message.
8. The PLC sub-station wireless control system based on the internet of things of claim 7, wherein the PLC sub-station wireless control system based on the internet of things comprises:
transmitting, by a mobile terminal, NACK information to the base station in a second set of symbols of a second time slot in response to not receiving the first downlink control message and receiving a remaining portion of the PLC sub-station control command, wherein the NACK information is feedback for the remaining portion of the PLC sub-station control command, the second time slot being spaced apart from the first time slot by two time slots, wherein the second set of symbols of the second time slot includes a last symbol of the second time slot, wherein the second set of symbols of the second time slot is indicated in the second downlink control message;
means for transmitting, by a base station, a first downlink control message to a mobile terminal in a first set of symbols of a first time slot if it is determined that the PLC sub-station control command is to be transmitted to the mobile terminal in one time slot;
means for transmitting, by the base station, a third downlink control message to the mobile terminal at a second symbol set of a third time slot if the base station receives a second PLC sub-station control command transmitted by the PLC control center server again after transmitting the PLC sub-station control command to the mobile terminal, wherein the third time slot is a time slot immediately following the first time slot;
Means for preparing, by a mobile terminal, to transmit ACK information to the base station in response to receiving the PLC sub-station control command at a first set of symbols for a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols for the fourth time slot includes a first symbol of the fourth time slot, wherein resources for transmitting ACK information are indicated in the first downlink control message;
means for determining, by a mobile terminal, whether the mobile terminal has decoded the third downlink control message before sending ACK information to the base station;
means for transmitting, by the mobile terminal, ACK information to the base station in the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal;
and if it is determined that the mobile terminal did not decode the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, third ACK information to the base station at a second set of symbols of a fourth time slot, wherein the third ACK information is feedback for the second PLC sub-station control command, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
9. The PLC sub-station wireless control system based on the internet of things of claim 8, wherein the PLC sub-station wireless control system based on the internet of things comprises:
means for determining, by the mobile terminal, whether the second PLC sub-station control command was received if it is determined that the mobile terminal has decoded the third downlink control message;
and if it is determined that the mobile terminal has decoded the third downlink control message and in response to receiving the second PLC sub-station control command, transmitting, by the mobile terminal, first ACK information and third ACK information to the base station at a second set of symbols of a fourth time slot, wherein the first ACK information is feedback for the PLC sub-station control command and the third ACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
10. The PLC sub-station wireless control system based on the internet of things of claim 9, wherein the PLC sub-station wireless control system based on the internet of things comprises:
means for preparing, by a mobile terminal, to transmit NACK information to the base station in response to not receiving the PLC sub-station control command, a first set of symbols in a fourth time slot, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the first set of symbols in the fourth time slot includes a first symbol of the fourth time slot, wherein resources for transmitting NACK information are indicated in the first downlink control message;
means for determining, by a mobile terminal, whether the mobile terminal has decoded the third downlink control message before transmitting NACK information to the base station;
means for transmitting NACK information to the base station by the mobile terminal in the first set of symbols of the fourth slot if it is determined that the third downlink control message is not decoded by the mobile terminal;
and means for transmitting, by the mobile terminal, second NACK information to the base station at a second set of symbols of a fourth time slot if it is determined that the third downlink control message is not decoded by the mobile terminal and in response to not receiving the second PLC sub-station control command, wherein the second NACK information is feedback for the second PLC sub-station control command, wherein the fourth time slot is a time slot immediately following the third time slot, wherein the second set of symbols of the fourth time slot includes a last symbol of the fourth time slot, wherein the second set of symbols of the fourth time slot is indicated in the third downlink control message.
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