KR20180089946A - Method and apparatus for transmitting and receiving for internet of things device - Google Patents

Abstract

The present invention provides a method and a device for transmitting and receiving for an internet of things (IoT) device capable of minimizing power consumption of an IoT device. In a network in which a plurality of small cell nodes exist in a cell region of a central node, the central node determines one small cell node among the plurality of small cell nodes as an uplink node for the IoT device, performs a connection setting to the IoT device, receives uplink data from the IoT device through the uplink node, and directly transmits downlink data to the IoT device.

Description

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING INTERNET OF THINGS DEVICE FIELD OF THE INVENTION [

The present invention relates to a method and an apparatus for transmitting and receiving data to and from a plurality of small cells in a macrocell, .

Object Internet refers to an environment in which all objects can be interconnected through a communication network to share various information and implement new services. In the Internet of things, smart devices equipped with various sensors and network functions should be able to transmit and receive data quickly and reliably through a communication network and provide services. In order to support such objects Internet, a low-power consumption device technology that minimizes power consumption, a low-power communication technology in a communication network, and a structure capable of accommodating a large amount of devices.

In Long Term Evolution (LTE) mobile communication systems, LTE-M and NB-IoT (Long-Term Evolution) mobile communication systems are also providing Internet services by introducing technologies such as LTE-M and Narrowband Internet of Things (NB-IoT) Compared to LTE, it is designed to reduce bandwidth and transmission speed to simple wireless transmission technology, and to have half-duplex transmission method and long waiting time. However, since the mobile communication network is used intact, in a network structure in which macro cells and small cells are mixed, the downlink transmission power of the macrocell is larger than the transmission power of the small cell, The device selects the macro cell as its own cell. However, since there is a limit on the transmission power that the device transmits, in the case of the uplink, the selection of a cell as a small cell closer to the farther away macrocell ensures that the path loss is minimized and the signal to noise ratio (SNR) . Assuming that a service requiring the same transmission rate is provided, the same reception SNR can be satisfied with a much lower transmission power when transmitting to a small cell in the uplink.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus for transmitting and receiving data to and from an object Internet device that can minimize power consumption of the object Internet device.

According to an embodiment of the present invention, a method for transmitting and receiving for a destination Internet device at the central node is provided in a network in which a plurality of small cell nodes exist in a cell area of the central node. A method for transmitting and receiving includes determining a small cell node of the plurality of small cell nodes as an uplink node for the destination Internet device, performing connection establishment with the destination Internet device, Receiving data via the uplink node, and transmitting the downlink data directly to the destination Internet device.

Wherein the determining step comprises the steps of: receiving reception information on the received random access preamble from at least one small cell node that has received a random access preamble commonly used by the plurality of small cell nodes from the object Internet device; Determining the one small cell node as the uplink node based on the received information of the received random access preamble and configuring a random access response for the random access preamble received at the determined uplink node, And transmitting the data.

The small cell node having the largest received power of the received random access preamble may be determined as the uplink node for the destination Internet device.

The connection setting step may include receiving a connection setup request message from the object Internet device through the uplink node, establishing a connection with the object internet device, and transmitting a connection setting message to the object internet device Step < / RTI >

The step of receiving the connection setup request message may include receiving a transmission block including the connection setup request message from the uplink node when the uplink node has successfully received the connection setup request message have.

Wherein the step of performing connection establishment comprises: receiving from the uplink node successful reception or successful reception failure information of the connection setup request message in the uplink node, And transmitting Hybrid Automatic Repeat and Request (HARQ) feedback to the object Internet device.

The transmitting and receiving method may further include receiving downlink HARQ feedback according to successful reception or unsuccessful reception failure information of the downlink data from the object Internet device through the uplink node.

The step of receiving the downlink HARQ feedback may include receiving from the uplink node successful reception or successful reception failure information of the uplink data channel including the downlink HARQ feedback in the uplink node .

Wherein the step of receiving the uplink data through the uplink node includes receiving from the uplink node successful reception or successful reception failure information of the uplink data in the uplink node, And transmitting uplink HARQ feedback according to the failure information to the object Internet device.

Wherein each of the plurality of small cell nodes includes only an uplink physical layer for processing an uplink transmission and the central node includes a downlink physical layer, a medium access control (MAC) layer and an upper layer of the MAC layer, The small cell node and the central node may be connected by an interface having a delay time.

According to another embodiment of the present invention, there is provided a method for transmitting and receiving a matter Internet device in a network in which a plurality of small cell nodes exist in a cell area of a central node. The transmitting and receiving method includes performing a procedure in which one of the plurality of small cell nodes is determined as an uplink node for the object Internet device, transmitting uplink data to the central node through the uplink node And directly receiving downlink data from the central node from the central node.

The method of claim 1, wherein the transmitting and receiving method further comprises: receiving, from the central node receiving the successful reception failure information or the successful reception failure information of the uplink data in the uplink node, a Hybrid Automatic Repeat and Request (HARQ) ) ≪ / RTI > feedback.

The transmitting and receiving method may further include transmitting downlink HARQ feedback according to successful reception or successful reception failure information of the downlink data to the central node through the uplink node.

Wherein the step of performing comprises the steps of: transmitting a random access preamble commonly used by the plurality of small cell nodes; transmitting, by at least one small cell node, the received information on the received random access preamble, Determining that one small cell node is the uplink node, and receiving a random access response for the random access preamble received from the uplink node from the central node.

The transmitting and receiving method may further include performing a procedure for establishing a connection with the central node through the uplink node after receiving the random access response.

Wherein each of the plurality of small cell nodes includes only an uplink physical layer for processing an uplink transmission and the central node includes a downlink physical layer, a medium access control (MAC) layer and an upper layer of the MAC layer, The small cell node and the central node may be connected by an interface having a delay time.

According to another embodiment of the present invention, there is provided a transceiving device for a matter Internet device of a central node in a network in which a plurality of small cell nodes exist in a cell area of a central node. The transceiver includes a processor, and a transceiver. Wherein the processor is configured to transmit downlink data through a downlink connected between the object Internet device and the central node, and transmit the downlink data between the object Internet device and the central node through the one small cell node determined among the plurality of small cell nodes And receives the uplink data transmitted from the object Internet device via the uplink. The transceiver is connected to the processor, and transmits and receives radio signals to and from the plurality of small cell nodes and the Internet device.

Wherein the central node comprises a downlink physical layer, a medium access control (MAC) layer, and an upper layer of the MAC layer, wherein the uplink physical layer is configured in the determined one small cell node, And is connected to an interface having a small cell node and a delay time.

Wherein the processor receives, via the transceiver, the reception power of the random access preamble from at least one small cell node that has received the random access preamble transmitted from the plurality of small cell nodes from the object Internet device, Determining a small cell node having the largest received power as the one small cell node and configuring a random access response for the random access preamble received at the determined one small cell node to transmit the random access response to the destination internet device through the transceiver Lt; / RTI >

The processor receives the successful reception failure information or the unsuccessful reception failure information of the uplink data in the uplink node through the transceiver and transmits an uplink HARQ (Hybrid Automatic Repeat and Request) feedback To the object Internet device via the transceiver.

According to the embodiment of the present invention, the power consumption of the object Internet device can be minimized by separating and operating the cells connected to the downlink and the uplink on the air interface.

1 is a diagram illustrating an example of a network according to an embodiment of the present invention.
2 is a diagram illustrating another example of a network according to an embodiment of the present invention.
3 is a diagram illustrating a connection between a central node and an uplink node according to an embodiment of the present invention.
4 is a diagram illustrating a data plane protocol structure of a central node and an uplink node according to an embodiment of the present invention.
5 is a diagram illustrating a control plane protocol structure of a central node and an uplink node according to an embodiment of the present invention.
6 is a flowchart illustrating a method of connecting a device to a cell after powering on according to an embodiment of the present invention.
7 is a flowchart illustrating a HARQ transmission method between a central node, an uplink node, and a device according to an embodiment of the present invention.
8 is a configuration block diagram of a central node, an uplink node, and a device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) (RS), a relay node (RN) serving as a base station, an advanced relay station (ARS) serving as a base station, a high reliability relay station (HR) A femto BS, a home Node B, a HNB, a pico BS, a metro BS, a micro BS, ), Etc., and all or all of ABS, Node B, eNodeB, AP, RAS, BTS, MMR-BS, RS, RN, ARS, HR- And may include negative functionality.

Hereinafter, a method and an apparatus for transmitting / receiving data to / from an Internet device according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating an example of a network according to an embodiment of the present invention.

Referring to FIG. 1, a node having a cell region corresponding to a macro cell is referred to as a central node 100, and a node having a cell region corresponding to a small cell is referred to as an uplink node 200. For example, the central node 100 may be a macro base station that manages macro cells, and the uplink node 200 may be a small cell that manages small cells. Small cells can have a coverage of at least 10m to several hundreds of meters and can be classified into femtocell, PicoCell, MetroCell & MicroCell, It can be divided into Home, Enterprise, Urban, and Rural according to the installation area and service purpose.

The device 300 receives the downlink signal from the central node 100 and transmits the uplink signal to the uplink node 200. The uplink node 200 transmits the received uplink signal to the central node 100.

That is, according to the embodiment of the present invention, the device 300 sets a different node (cell) to which the downlink and the uplink are connected on the air interface.

2 is a diagram illustrating another example of a network according to an embodiment of the present invention.

Referring to FIG. 2, a plurality of uplink nodes 200 may exist in a cell region covered by the central node 100.

The cell region of the uplink node 200 is set to a proper size so as to minimize the output transmitted by the device 300 and the cell region covered by the uplink node 200 is set to a size of the uplink node 200, May be partially overlapped with the cell region covered by the cell.

3 is a diagram illustrating a connection between a central node and an uplink node according to an embodiment of the present invention.

Referring to FIG. 3, the central node 100 and the uplink node 200 may be connected to an interface having a delay time of several tens of us to several milliseconds. The received signal from the uplink node 100 is transmitted to the central node 100 through the interface and the control signal for controlling the uplink node 200 is transmitted from the central node 100.

4 is a diagram illustrating a data plane protocol structure of a central node and an uplink node according to an embodiment of the present invention.

Referring to FIG. 4, only the uplink physical layer (PHY) exists in the uplink node 200, and all the remaining layers are located in the central node 100. The central node 100 includes a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a downlink PHY layer. The PHY layer is divided into an uplink PHY layer and a downlink PHY layer, and an uplink PHY layer is located in the uplink node 200. That is, the central node 100 has a structure in which only the uplink PHY layer of the data plane is excluded and the remaining layers are intact.

The functions of the PDCP layer, the RLC layer, the MAC layer, and the PHY layer are well-known contents and will not be described in detail.

5 is a diagram illustrating a control plane protocol structure of a central node and an uplink node according to an embodiment of the present invention.

Referring to FIG. 5, only the uplink PHY layer exists in the uplink node 200, and all the remaining layers are located in the central node 100. The central node 100 includes an RRC (Radio Resource Control) layer, a PDCP layer, an RLC layer, a MAC layer, and a downlink PHY layer, and may include an RRM (Radio Resource Management) entity.

4 and 5 illustrate the structure of a hybrid automatic repeat request (HARQ) feedback for an uplink transport block (TB) received from the central node 100 through the uplink node 200, a random access preamble It is possible to efficiently process the random access response to the random access response.

6 is a flowchart illustrating a method of connecting a device to a cell after powering on according to an embodiment of the present invention.

Referring to FIG. 6, the device 300 acquires frequency and time synchronization by receiving a synchronization signal by turning on the power, determines a downlink cell, and acquires system information from the central node 100 managing the downlink cell (S600). The acquired system information includes information on the random access preamble commonly used by the uplink nodes 200i, 200j, 200k, and 200l.

The device 300 transmits a random access preamble commonly used by the uplink nodes 200i, 200j, 200k, and 200l (S610).

The uplink nodes 200i, 200j, 200k, and 200l surrounding the device 300 receive the random access preamble transmitted by the device 100 and transmit the random access preamble time delay, preamble sequence information, And the like to the central node 100 (S620).

The random access resources common to the uplink nodes 200i, 200j, 200k, and 200l belonging to the cell radius of the central node 100 are used so that even if the transmission output of the random access preamble transmitted from the device 300 is small, The macro nodes are received by the link nodes 200i, 200j, 200k, and 200l, so that a macro diversity effect can be obtained.

In the MAC layer of the central node 100, an uplink node (for example, 200i) having the largest received power based on the information about the preamble received from the uplink nodes 200i, 200j, 200k, 300 in step S630, and configures a random access response for the random access preamble received in the determined uplink node 200i. If the received power of the random access preamble is lower than the reference value even if the time delay is small, it is determined that the device 300 remote from the uplink node has transmitted the random access preamble. The random access response includes a temporary RNTI (Radio Network Temporary Identifier) corresponding to the temporary ID to be used in establishing connection in the device 300, uplink resource allocation information for the data to be transmitted in the uplink upon receiving the random access response from the device 300 And may or may not include a timing advance (TA) value that compensates for the time delay according to the cell radius of the uplink node 200i.

The central node 100 transmits a random access response to the device 300 through the downlink in step S640 and transmits the random access response to the uplink node 200i to which the device 300 should receive the uplink data, And transmits the allocation information (S650). Here, uplink resource allocation is performed in the RRM entity and the MAC layer of the central node 100.

In order to cancel the uplink signal interference received by the uplink nodes 200i, 200j, 200k, and 200l, the central node 100 transmits corresponding resources to the other uplink nodes 200j, 200k, and 200l that receive the random access preamble You can use an unassigned method. Alternatively, the central node 100 allocates the pilot signal used for demodulating the uplink physical channel to have the orthogonality between neighboring uplink nodes, so that even when the same frequency and time resources are used, the interference signal can be easily removed .

Upon receiving the random access response, the device 300 transmits a connection setup or connection reset request message to the uplink node 200i through the uplink physical resource included in the random access response (S660).

The uplink node 200i receives the connection setup or connection reset request message and transmits it to the central node 100 (S670). When the uplink node 200i successfully receives the connection setup or connection reset request message, the uplink node 200i transmits the TB including the connection setup or connection reset request message to the central node 100. [ On the other hand, if the uplink node 200i fails to successfully receive the connection setup or connection reset request message, the uplink node 200i transmits a reception failure report to the central node 100. [

If the connection setup or connection reset request message is successfully received from the uplink node 200i, the central node 100 performs connection setup or reset with the device 300 (S680), and transmits a connection setup or reset message to the device 300 (S690).

In this way, the connection between the device 300 and the central node 100 is completed, and the device 300 is connected to the central node 100. Then, the central node 100 sets up the reception to the uplink node 200i so that the uplink node 200i can receive the signal from the device 300. [

In the mobile communication system, if transmission of the transmitted TB fails, retransmission is performed based on Hybrid Automatic Repeat and Request (HARQ) feedback. In the network structure according to the embodiment of the present invention, since the downlink transmission is performed in the central node 100 and the uplink transmission is performed through the uplink node 200i to which the device 300 is connected, Depending on the interface delay time between the node 100 and the uplink node 200i.

The HARQ retransmission scheme can be divided into synchronous and asynchronous. The synchronous HARQ is performed when the HARQ feedback and the initial transmission or retransmission are performed at a predetermined time, and the interface delay time between the central node 100 and the uplink node 200i is interfaced within several tens of us. Asynchronous HARQ is a method of allocating resources at an arbitrary time for retransmission. When the interface delay time between the central node 100 and the uplink node 200i is interfaced within several milliseconds, if the asynchronous HARQ scheme is used, It is possible to perform retransmission through

7 is a flowchart illustrating a HARQ transmission method between a central node, an uplink node, and a device according to an embodiment of the present invention.

Referring to FIG. 7, the central node 100 transmits information on allocation of downlink data channel, allocation information of an uplink data channel, retransmission of a previously received uplink data channel, and the like through a downlink control channel (S700).

The device 300 receives the downlink control channel and confirms information such as allocation information of the downlink data channel, allocation information of the uplink data channel, retransmission of the previously received uplink data channel, and the like.

Next, the device 300 receives the downlink data channel transmitted from the central node based on the downlink data channel allocation information (S710), and transmits the HARQ feedback, which is the reception success of the downlink data channel, to the downlink control channel To the uplink node 200i through the uplink data channel (S720).

When the uplink data channel is successfully received, the uplink node 200i transmits the TB in the uplink data channel to the central node 100. If unsuccessful reception of the uplink data channel fails, 100) (S730).

The central node 100 transmits the uplink HARQ feedback to the device 300 through the downlink control channel according to the success or failure of reception of the uplink data channel of the uplink node 200i in operation S740.

8 is a configuration block diagram of a central node, an uplink node, and a device according to an embodiment of the present invention.

8, the central node 100 includes a processor 110, a transceiver 120, and a memory 130. In one embodiment, The uplink node 200 includes a processor 210, a transceiver 220, and a memory 230. The device 300 also includes a processor 310, a transceiver 320, and a memory 330.

The processors 110, 210 and 310 operate to implement the functions, operations, procedures and methods performed by the central node 100, the uplink node 200 and the device 300 described in the embodiments of the present invention . In an embodiment of the present invention, the processor 210 can only process operations in the uplink PHY layer. The processor 110 of the uplink node 200 can process an operation in the remaining layers except for the uplink PHY layer. The processors 110, 210 and 310 of the central node 100 execute instructions stored or loaded in the memories 130, 230 and 330, respectively, to transmit the instructions to the central node 100, Operations, procedures, and methods performed by the device 200 and the device 300 may be implemented.

The transceivers 120, 220, and 320 are coupled to the processors 110, 210, and 310, respectively, to transmit and / or receive wireless signals.

The memories 130, 230 and 330 are connected to the processors 110, 210 and 310 to store various information for driving the processors 110, 210 and 310 for driving the processors 110, 210 and 310, do. The memories 130, 230, and 330 store instructions for execution by the processors 110, 210, and 310, respectively, or temporarily store commands by loading instructions from a storage device (not shown).

The processor 110, 210, 310 may be a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods in accordance with embodiments of the invention may be performed have.

The memory 130, 230, 330 may include a read-only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium, and /

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

A method of transmitting and receiving for a destination Internet device at a central node in a network in which a plurality of small cell nodes exist in a cell area of a central node,
Determining one of the plurality of small cell nodes as an uplink node for the destination Internet device,
Performing connection setting with the object Internet device,
Receiving uplink data from the object Internet device through the uplink node, and
Directly transmitting the downlink data to the destination Internet device
Lt; / RTI > The method of claim 1,
The step of determining
Receiving reception information on a received random access preamble from at least one small cell node that has received a random access preamble commonly used by the plurality of small cell nodes from the object Internet device,
Determining the one small cell node as the uplink node based on reception information of the received random access preamble, and
And configuring a random access response for the random access preamble received at the determined uplink node and transmitting the random access response to the object Internet device. 3. The method of claim 2,
Wherein the small cell node having the largest received power of the received random access preamble is determined as an uplink node for the destination Internet device. The method of claim 1,
The step of performing the connection setting
Receiving a connection establishment request message from the object Internet device via the uplink node, and
Establishing a connection with the destination Internet device, and transmitting a connection setup message to the destination Internet device. 5. The method of claim 4,
Wherein the step of receiving the connection setup request message includes receiving a transmission block including the connection setup request message from the uplink node when the uplink node has successfully received the connection setup request message, Way. 5. The method of claim 4,
The step of performing the connection setting
Receiving from the uplink node successful reception or successful reception failure information of the connection setup request message in the uplink node, and
And transmitting uplink HARQ (Hybrid Automatic Repeat and Request) feedback according to the successful reception or successful reception failure information to the object Internet device
Lt; / RTI > The method of claim 1,
Receiving downlink HARQ feedback according to successful reception or unsuccessful reception failure information of the downlink data from the object Internet device through the uplink node
Lt; / RTI > 8. The method of claim 7,
Wherein the step of receiving the downlink HARQ feedback comprises receiving from the uplink node successful reception or successful reception failure information of the uplink data channel including the downlink HARQ feedback in the uplink node . The method of claim 1,
The step of receiving the uplink data through the uplink node comprises:
Receiving successful reception or successful reception failure information of the uplink data in the uplink node from the uplink node, and
And transmitting uplink HARQ feedback according to the successful reception failure information or the unsuccessful reception failure information to the object Internet device. The method of claim 1,
Wherein each of the plurality of small cell nodes includes only an uplink physical layer for processing an uplink transmission,
The central node includes a downlink physical layer, a medium access control (MAC) layer, and an upper layer of the MAC layer,
Wherein the small cell node and the central node are connected by an interface having a delay time. A method for transmitting and receiving an object Internet device in a network in which a plurality of small cell nodes exist in a cell area of a central node,
Performing a procedure in which one of the plurality of small cell nodes is determined as an uplink node for the destination Internet device,
Transmitting uplink data to the central node via the uplink node, and
Directly receiving downlink data from the central node from the central node
Lt; / RTI > 12. The method of claim 11,
And receiving uplink HARQ (Hybrid Automatic Repeat and Request) feedback according to the successful reception or successful reception failure information directly from the central node receiving the successful reception or unsuccessful reception failure information of the uplink data in the uplink node Step
Lt; / RTI > 12. The method of claim 11,
And transmitting downlink HARQ feedback according to successful reception or unsuccessful reception failure information of the downlink data to the central node through the uplink node
Lt; / RTI > 12. The method of claim 11,
The step of performing
Transmitting a random access preamble commonly used by the plurality of small cell nodes,
Determining from the at least one small cell node that the one small cell node is the uplink node by the central node that has received reception information for the received random access preamble;
Receiving a random access response for the random access preamble received from the uplink node from the central node. The method of claim 14,
Performing a procedure for establishing a connection with the central node through the uplink node after receiving the random access response;
Lt; / RTI > 12. The method of claim 11,
Wherein each of the plurality of small cell nodes includes only an uplink physical layer for processing an uplink transmission,
The central node includes a downlink physical layer, a medium access control (MAC) layer, and an upper layer of the MAC layer,
Wherein the small cell node and the central node are connected by an interface having a delay time. 1. A transceiver for a destination Internet device of a central node in a network in which a plurality of small cell nodes exist in a cell area of a central node,
Transmitting the downlink data through a downlink connected between the object Internet device and the central node,
A process for receiving and processing uplink data transmitted from the object Internet device via the object Internet device and the uplink connected between the central nodes through one small cell node determined among the plurality of small cell nodes,
A transceiver coupled to the processor and configured to transmit and receive a radio signal to and from the plurality of small cell nodes and the Internet appliance
/ RTI > The method of claim 17,
Wherein the central node comprises a downlink physical layer, a medium access control (MAC) layer, and an upper layer of the MAC layer, wherein the uplink physical layer is configured in the determined one small cell node,
And the central node is connected to the plurality of small cell nodes through an interface having a delay time. The method of claim 17,
Wherein the processor receives, via the transceiver, the reception power of the random access preamble from at least one small cell node that has received the random access preamble transmitted from the plurality of small cell nodes from the object Internet device, Determining a small cell node having the largest received power as the one small cell node and configuring a random access response for the random access preamble received at the determined one small cell node to transmit the random access response to the destination Internet device through the transceiver Transmitting / receiving device. The method of claim 17,
The processor receives the successful reception failure information or the unsuccessful reception failure information of the uplink data in the uplink node through the transceiver and transmits the uplink HARQ (Hybrid Automatic Repeat and Request) feedback To the object Internet device via the transceiver.

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