KR20170035577A - Method for transmitting/receiving data in wireless communication system - Google Patents

Method for transmitting/receiving data in wireless communication system Download PDF

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Publication number
KR20170035577A
KR20170035577A KR1020150134597A KR20150134597A KR20170035577A KR 20170035577 A KR20170035577 A KR 20170035577A KR 1020150134597 A KR1020150134597 A KR 1020150134597A KR 20150134597 A KR20150134597 A KR 20150134597A KR 20170035577 A KR20170035577 A KR 20170035577A
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KR
South Korea
Prior art keywords
data
transmitting
transmitting node
receiving
node
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KR1020150134597A
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Korean (ko)
Inventor
이성로
정민아
공준익
Original Assignee
목포대학교산학협력단
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Priority to KR1020150134597A priority Critical patent/KR20170035577A/en
Publication of KR20170035577A publication Critical patent/KR20170035577A/en

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    • H04W72/1247—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/002—Mutual synchronization

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method for transmitting/receiving data in a wireless communication system according to the present invention includes the steps of: receiving a plurality of preamble signals from each of a first transmission node and a second transmission node; transmitting a first response signal in response to the preamble signal to the second transmission node of which the priority is set higher than that of the first transmission node; receiving first data from the second transmission node having received the first response signal; receiving one or more preamble signals from the first transmission node, when the reception of the first data is completed; transmitting, to the first transmitting node, a second response signal in response to the one or more preamble signals; and receiving second data from the first transmission node. In the first transmission node and the second transmission node, periods of the preamble signals are set different from each other according to the priority.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for transmitting / receiving data in a wireless communication system,

The present invention relates to a method of transmitting and receiving data in a wireless communication system.

In the asynchronous MAC protocol, each node independently operates according to its own duty cycle, and synchronizes with each other at the transmitting and receiving ends whenever necessary.

Published in 2006 "M. Buettner, G. V. Yee, E. Anderson, and R. Han, "X-MAC: A Short Preamble MAC Protocol for Duty-Cycled Wireless Sensor Networks", in Proc. Sensys, pp. 307-320, 2006 " discloses a data transmission / reception method as shown in FIG.

1 is a view for explaining a data transmitting / receiving method according to the related art.

Referring to FIG. 1, in the data transmission / reception method according to the X-MAC scheme, a short preamble is repeatedly transmitted to synchronize the transmission and reception ends. However, the preamble sampling in the X-MAC scheme has a problem of consuming a lot of energy and congesting a channel because a single sender transmits many preambles in a short period in order to preempt a channel until one sender completes data transmission.

Further, there is a problem that there is no method for transmitting data of high priority.

In this regard, Korean Patent Laid-Open Publication No. 10-2009-0033005 (entitled: method of performing uplink new synchronization in a wireless communication system) discloses a method of restarting a time synchronization timer without signaling in a wireless communication system have.

The embodiment of the present invention reduces the congestion of the channel through the variable preamble sampling in which the preambles with different intervals of the preambles are transmitted according to the priority order and the data in the wireless communication system which gives the priority of the channel to the higher priority data Receiving method.

It should be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to a first aspect of the present invention, there is provided a method of transmitting and receiving data in a wireless communication system, the method including receiving a plurality of preamble signals from a first transmitting node and a second transmitting node, respectively; Transmitting a first response signal corresponding to the preamble signal to the second transmitting node whose priority is set higher than that of the first transmitting node; Receiving first data from a second transmitting node that has received the response signal; Receiving one or more preamble signals from the first transmitting node upon completion of receiving the first data; Transmitting a second response signal corresponding to the one or more preamble signals to the first transmitting node, and receiving second data from the first transmitting node. At this time, the periods of the preamble signals of the first transmitting node and the second transmitting node are set different according to the priority.

According to any one of the above-mentioned objects, the congestion degree of the channel can be reduced through the variable preamble sampling in which the preamble is transmitted by setting the period of the preamble differently according to the priority of the transmitting node.

QoS can be guaranteed by giving priority to a channel for data transmission to a transmitting node having a higher priority.

1 is a view for explaining a data transmitting / receiving method according to the related art.
2 is a block diagram of a wireless communication system according to an embodiment of the present invention.
3 is a flowchart of a data transmission / reception method according to an embodiment of the present invention.
4 and 5 are views for explaining a data transmission / reception method 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, which will be readily apparent to those skilled in the art. 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 explain the present invention in the drawings, parts not related to the description are omitted.

Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise.

2 is a configuration diagram of a wireless communication system 1 according to an embodiment of the present invention.

Referring to FIG. 2, a wireless communication system 1 according to an embodiment of the present invention includes a first transmitting node 10, a second transmitting node 20, and a receiving node 30.

The first transmitting node 10 and the second transmitting node 20 respectively perform data communication with the receiving node 30 for frame transmission.

At this time, the first transmission node 10 and the second transmission node 20 may be terminals for transmitting and receiving data. That is, the first transmitting node 10 and the second transmitting node 20 may be, for example, a wireless communication terminal that is guaranteed to be portable and mobility, that is, a Personal Communication System (PCS), a Global System for Mobile communications (GSM) A handheld-based wireless communication terminal such as a personal digital cellular (PDA), a personal handyphone system (PHS), a personal digital assistant (PDA), or a wireless broadband Internet (Wibro) terminal. The terminal 740 may be a general computer such as a server, a workstation, a desktop computer and a notebook computer, a smart device such as a smart phone, ), And the like.

The receiving node 30 according to an exemplary embodiment of the present invention may be a wireless node such as a base station, a repeater, an evolved NodeB (eNB), a base transceiver system (BTS), a wireless access point (WAP) And may include a device used for communication.

Hereinafter, a data transmission / reception method according to an embodiment of the present invention will be described in detail with reference to FIG. 3 to FIG.

3 is a flowchart of a data transmission / reception method according to an embodiment of the present invention. 4 and 5 are views for explaining a data transmission / reception method according to an embodiment of the present invention.

First, the receiving node 30 receives a plurality of preamble signals from the first transmitting node 10 and the second transmitting node 20, respectively (S110). The first transmitting node 10 and the second transmitting node 20 may transmit a preamble signal to the receiving node 30 for channel occupancy at the same time or at the same time.

Therefore, in principle, the first transmitting node 10 and the second transmitting node 20 must compete with each other in order to occupy a channel for data transmission. However, as described below, the priorities are set to be different from each other As a result, the channel for data transmission can be preempted according to the priority.

At this time, the first transmitting node 10 and the second transmitting node 20 are set to have different priorities. As the priorities are set to be different from each other, the periods of the respective preamble signals are also set to be different from each other. Preferably, the preamble signal of the second transmitting node 20 having a higher priority is set to a shorter period than the preamble signal of the first transmitting node 10.

Hereinafter, it is assumed that the priority order of the first transmission node 10 is set to be lower than the priority order of the second transmission node 20.

Next, the receiving node 30 transmits a first response signal to the second transmitting node 20 having a higher priority than the first transmitting node 10 in response to the preamble signal (S120). That is, since the second transmitting node 20 having a higher priority transmits a preamble signal in a short period, it can occupy the channel for data transmission first and transmit data to the receiving node 30 first.

The second transmitting node 20 having received the first response signal transmits the first data to the receiving node 30, and the receiving node 30 receives the first data.

When the reception of the first data is completed, the receiving node 30 receives one or more preamble signals from the first transmitting node 10 again (S140).

Then, the first transmitting node 10 transmits a second response signal corresponding to one or more preamble signals (S150), and the first transmitting node 10 receiving the second response signal transmits the second data to the receiving node 30 , The second receiving node 30 receives it (S160).

On the other hand, when the first transmission node 10 stops transmitting the preamble signal as it receives the first response signal and receives a response signal indicating that the transmission of the first data transmitted by the second transmission node 20 is completed .

Upon receiving a response signal indicating that the transmission of the first data is completed, the first transmitting node 10 may transmit one or more preamble signals to inform the receiving node 30 that there is data to be transmitted, and then transmit the data .

Alternatively, the data transmission method according to an embodiment of the present invention may include size information of data to be transmitted to a plurality of preamble signals transmitted by the first transmitting node 10 and the second transmitting node 20, respectively.

Accordingly, the first transmitting node 10 can operate in a standby mode while the first data transmitted by the second transmitting node 20 is transmitted. That is, the first transmitting node 10 receives the first response signal transmitted from the receiving node 30 to the second transmitting node 20, calculates the size of the first data, , It can operate in the standby mode without operating in the reception mode for receiving the response signal indicating that the transmission of the first data is completed.

When the transmission of the first data is completed, one or more preamble signals may be transmitted to the receiving node 30 and then the data may be transmitted. Accordingly, the first transmitting node 10 can reduce energy consumption due to operation in the receiving mode until the data transmission of the second transmitting node 20 is completed.

In the above description, steps S110 to S160 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. Also, some of the steps may be omitted as necessary, and the order between the steps may be changed.

According to an embodiment of the present invention, the preamble period can be set differently according to the priority of the transmitting node, and the congestion of the channel can be reduced through the variable preamble sampling for transmitting the preamble.

That is, there is a problem that preamble sampling, which operates in a short cycle like the X-MAC technique according to the conventional technique, consumes a lot of energy when the receiving node in a waiting state is not aware of when it will wake up.

However, according to an embodiment of the present invention, energy consumption of a transmitting node can be reduced by adjusting a preamble sampling interval of a transmitting node having a low priority.

QoS can be guaranteed by giving priority to a channel for data transmission to a transmitting node having a higher priority.

That is, when a channel for data transmission is preempted through preamble sampling as in the conventional X-MAC technique, even if high priority data is to be transmitted, it is necessary to wait until the data transmission of the preemption transmission node is completed There is a problem.

However, according to an embodiment of the present invention, preamble sampling is performed in a shorter period as the priority is higher, so that data can be transmitted / received preferentially to the receiving node.

The method for transmitting and receiving data in the wireless communication system 1 according to an embodiment of the present invention may also be implemented in the form of a computer program stored in a medium executed by a computer or a recording medium including instructions executable by the computer . Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

While the methods and systems of the present invention have been described in connection with specific embodiments, some or all of those elements or operations may be implemented using a computer system having a general purpose hardware architecture.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: Wireless communication system
10: first transmitting node
20: second transmitting node
30: Receiving node

Claims (2)

A method of transmitting and receiving data in a wireless communication system,
Receiving a plurality of preamble signals from a first transmitting node and a second transmitting node, respectively;
Transmitting a first response signal corresponding to the preamble signal to the second transmitting node whose priority is set higher than that of the first transmitting node;
Receiving first data from a second transmitting node that has received the response signal;
Receiving one or more preamble signals from the first transmitting node upon completion of receiving the first data;
Transmitting a second response signal to the first transmitting node in response to the at least one preamble signal;
Receiving second data from the first transmitting node,
Wherein the first transmitting node and the second transmitting node have different periods of the preamble signal according to the priority order. The method according to claim 1,
Wherein the plurality of preamble signals each include size information of data to be transmitted,
Wherein the first transmitting node operates in a standby mode while the first data is transmitted and transmits the at least one preamble signal when the transmission of the first data is completed.
KR1020150134597A 2015-09-23 2015-09-23 Method for transmitting/receiving data in wireless communication system KR20170035577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150134597A KR20170035577A (en) 2015-09-23 2015-09-23 Method for transmitting/receiving data in wireless communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150134597A KR20170035577A (en) 2015-09-23 2015-09-23 Method for transmitting/receiving data in wireless communication system

Publications (1)

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KR20170035577A true KR20170035577A (en) 2017-03-31

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Country Status (1)

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