KR100738985B1 - Apparatus for optionally receiving packet of wireless network and method thereof - Google Patents

Abstract

An apparatus and a method for selectively receiving a packet of a wireless network are provided to solve a problem that although an irrelevant event is received, a device wakes up unconditionally to provide power and determines validity. A MAC/PHY transceiver(101) converts a signal received from the outside into an internal signal, and transmits an internal signal to the outside. A pattern frame reading unit(102) determines validity of a packet received by the MAC/PHY transceiver(101). A wake-up switch(103) is variably turned on or off according to determined results of the pattern frame reading unit(102). When the wake-up switch(103) is turned on, an application processing unit(104) receives a packet and processes packet data.

Description

Apparatus for optionally receiving packet of wireless network and method

1 is a view schematically illustrating a form of a home network composed of a wireless communication device;

2 is a detailed view of the wireless communication device of FIG. 1;

3 is a flowchart illustrating an event processing procedure of a home network according to the prior art;

4 is a block diagram of a low power event processing apparatus of a home network system according to an embodiment of the present invention;

5 is a diagram of an operation of selectively processing a packet in a transceiver according to an embodiment of the present invention;

6 is a flow diagram of a process for processing an event at any device in accordance with an embodiment of the present invention.

* Brief description of symbols for the main parts of the drawings *

100: wireless communication device 101: MAC / PHY transceiver

102: pattern frame reader 103: wake-up switch

104: application processing unit 105: actuator

The present invention relates to a low power technology of a home network, and more particularly, to an apparatus and method for selectively receiving a packet in a wireless network.

In general, wireless communication devices in home networks are often battery-powered and are sensitive to low power designs. Therefore, many wireless devices are divided into idle / active states to drive only a minimum function for listening to a standard frequency channel in the idle state, and switch to the active state when a signal is applied to the standard frequency. To process

In the case of a device using a standard frequency in a wireless communication technology, when one transmitting device transmits a signal at a standard frequency, all devices within a certain range receive a signal through a standard frequency MAC / PHY transceiver and test its validity. If the packet is valid, the packet is processed. If the packet is invalid, the packet is dropped.

This validity determination is performed at the application level after going through the MAC / PHY transceiver. Therefore, due to the nature of the wireless communication environment, all signals transmitted at the standard frequency are transferred to the application level through the MAC / PHY transceiver of all the connected devices. Therefore, the more devices connected to the wireless network, the more signals are generated and consumed to drive the application. There is a problem that power is generated.

The prior art will be described in detail with reference to the drawings.

1 is a diagram schematically illustrating a form of a home network composed of a wireless communication device. In FIG. 1, an indoor home network system is wirelessly installed, indicating that signals are transmitted and received between wireless communication devices within a predetermined area.

2 is a detailed view of the wireless communication device of FIG. 1.

Referring to FIG. 2, when a conventional wireless communication device 100 transmits a packet from an arbitrary transmitting unit, the conventional wireless communication device 100 receives the packet at the MAC / PHY transceiver layer and transmits the packet to the application processing unit 12 to distinguish whether the signal is transmitted to itself. To pass. The application processor 12 determines whether the packet received by the packet is correct and outputs a control signal to execute the corresponding operation to the actuator 13 when the packet received by the application is correct.

However, if it is determined that the packet is to be received by a device other than itself, the packet is dropped.

Therefore, once the packet is received, the device forwards the packet to the application processor 12, which is the higher layer of the device, to wake up the device. Thereafter, the packet data processing or the drop is determined according to the determination of the application processing unit.

The above process will be described with reference to the drawings.

3 is a flowchart illustrating an event processing process of a home network according to the related art.

Referring to FIG. 3, first, a device receives an event signal from an arbitrary transmitting unit in an idle state (S1) (S2). In order to determine whether to perform the event, the device wakes up (S3) and delivers the packet to the application processor (S4). The application processor determines whether the delivered packet is valid (S5). If it is determined in S6 that the packet is valid, the control signal is output to perform the operation (S7). If it is determined that the packet is invalid, the packet is dropped (S8).

This structure wakes up the device to determine the validity of the packet, and determines whether the packet is dropped in the wake-up state, so that devices that do not need to wake up are temporarily put into active mode whenever a packet is transmitted. Since the conversion process is repeated periodically, power is unnecessarily wasted.

A first object of the present invention for solving the above problems is to provide a selective packet receiving apparatus of a wireless network.

In addition, a second object of the present invention for solving the above problems is to provide a selective packet receiving apparatus of a wireless network.

In accordance with a first aspect of the present invention, an apparatus for receiving a selective packet in a wireless network includes a transceiver for converting a signal received from the outside into an internal signal and transmitting the internal signal to the outside; A packet frame reading unit determining a validity of a packet received by the transceiver; A wake-up switch whose on / off state is changed according to a result of the packet frame reading unit; And an application processor for receiving a packet and processing packet data when the wake-up switch is turned on.

The packet frame reading unit may compare a pattern recorded in a pattern field in a received packet with a device-specific pattern for device identification. The device-specific pattern may be specified in advance in any pattern along with the device initial value setting. The device-specific pattern may include a pattern used when broadcasting to all devices. The device-specific pattern is recorded in the header field of the packet frame.

According to a second aspect of the present invention, there is provided a method of receiving a selective packet in a wireless network, the method including: receiving an event signal in an idle state; Comparing the pattern recorded in the pattern field of the packet including the event signal with a predefined device-specific pattern to determine the validity of the packet; If both patterns match, considering the device as an event to be processed, switching the device to the active mode and delivering a packet to the application processing unit; And performing a corresponding operation according to a series of algorithms determined by the application processor.

In the step of determining the validity of the packet, there is a feature including a predefined device specific pattern and the broadcast pattern of the received packet to compare.

In determining the validity of the packet, if it is determined that both patterns do not match, the method further includes dropping the packet.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

In the home network system according to the present invention, when an event processing packet is transmitted from an arbitrary event transmitter, the packet is transmitted to all devices registered in the home network system.

One device among all devices that receive a signal transmitted from the event transmitter will be described.

4 is a block diagram of a low power event processing apparatus of a home network system according to an embodiment of the present invention. Referring to FIG. 4, any wireless communication device 100 that receives an event reads a MAC / PHY transceiver 101 for processing a packet transmitted / received from the outside, and a pattern for reading a device pattern for identifying the communication device. Wake-up switch 103 whose on-off state is varied according to the frame reading unit 102, the pattern frame reading unit 102, and the wake-up switch 103, when activated, receives packets to analyze data. And an application processing unit 104 for processing the operation to be performed, and an actuator 105 for performing the operation according to the control signal output from the application processing unit 104.

The MAC / PHY transceiver 101 is a combination of a transmitter and a receiver in one package. The term is applied to wireless transmission devices such as mobile phones, cordless phones, and portable radios. It converts digital signals into analog signals, transmits them, receives analog signals into digital signals, and sends them to the application layer.

The transceiver has a matching signal corresponding to an application application (light, door lock, sensors, etc.) connected to the transceiver, and checks whether the matching signal is matched to determine whether to receive data using the received data.

Since the transceiver has little processing power, a module that recognizes and counts a value of a digital signal received during a predetermined clock counting as a trigger type can be used.

If the transceiver has processing capability, the transceiver may recognize the pattern itself and determine whether a signal is received from the transceiver.

While the pattern can be changed by manipulating the transceiver's input pins, the pattern can be defined in advance to have a unique pattern for each wireless device.

Subsequently, when a signal for a unique pattern of the wireless device is received, the corresponding wireless device may recognize the event signal received by the wireless device and perform the corresponding operation.

The pattern frame reading unit 102 determines whether the pattern recorded in the pattern field of the packet received by the MAC / PHY transceiver 101 and the device-specific pattern for device identification match, that is, whether the packet is to be processed in the current device. When the patterns coincide with each other, the wakeup switch 103 is activated (on).

The device-specific pattern can be preset in any pattern along with the device initial value setting, and can be directly set by the user by using a dip switch pin.

The device-specific pattern may include a pattern used when broadcasting to all devices. The pattern used during broadcasting is a function required when the home appliance is turned on at the same time and the same operation is instructed at the same time.

The pattern used for broadcasting is set differently from the device-specific pattern, and in order to be suitable for all device control, it is preferable to set the pattern frame to be easy to recognize, such as '00000000' or '11111111'.

The device specific pattern is preferably recorded in a header field indicating the start of a packet.

The wakeup switch 103 is activated according to the on signal output from the pattern frame reader 102 and transmits a packet received through the MAC / PHY transceiver 101 to the application processor 104.

If the packet received by the wireless communication device 100 is to be processed by another device, the pattern frame reader 102 outputs a mismatch signal to the wake-up switch 103. If the packet is received by the current device, the wake-up signal is activated. It is output to the switch 103.

The application processor 104 outputs a driving signal to the actuator 105 to perform a corresponding operation with a series of algorithms to be processed by the device.

In the above description, an arbitrary device has been described as an example, and an operation state of the corresponding devices will be described according to an event signal in a home network system composed of several devices.

Therefore, before the packet is delivered to the application processing unit 104, it is determined in advance whether the packet is valid in the MAC layer and whether to keep the wireless communication device in an idle state or to actively supply power.

The above operation will be described in detail with reference to the drawings.

5 is a diagram illustrating an operation of selectively processing a packet in a transceiver according to an embodiment of the present invention.

Referring to FIG. 5, the event signal transmitter 200 broadcasts an arbitrary event signal according to a user's intention (S10).

The event signal transmitter 200 in the present invention is not limited to the master and the slave of the home network system, and means a terminal for transmitting an event.

Hereinafter, a description will be made of the device 210 that should perform the event signal and the device 220 that does not need to perform the currently broadcast event.

The broadcast packet is delivered to the event signal receivers 210 and 220 of each device, and it is determined whether the packet is valid in the MAC layer of each event signal receiver 210 or 220 (S20 and S30).

The event signal receiving unit 210, which is assumed to be a device that receives the valid packet, outputs an on signal for activating the wake-up switch since it is determined that the event is to be processed by the current device after step S20 (S22).

When determining the packet validity, the pattern frame of the packet is compared with the device-specific pattern, but the comparison may include a broadcast pattern.

This is because there is a case where only one device is controlled and all devices are controlled by the same function at the same time.

When the wakeup switch is activated, the packet received through the transceiver is transmitted to the application processor (S24).

The application processor outputs a driving signal to the actuator according to a series of algorithms (S26).

On the other hand, since the event signal receiver 220 assumes that the device has received an invalid packet, it is determined that the event cannot be processed by the current device after step S30, the wake-up switch maintains the off state and drops the packet ( S32).

When a packet is dropped, it maintains an idle state that provides only the minimum power required by the device.

The above description is intended to simultaneously describe several devices and a device for transmitting an event signal. Hereinafter, a process of determining packet validity in one device will be described.

6 is a flowchart of a process of processing an event in any device according to an embodiment of the present invention.

As shown in FIG. 6, the device maintains an idle state until an event signal is received (S100). When the event signal is received (S110), the MAC layer determines whether the currently received event is an event to be processed by the current device (S112).

The method of determining whether the event is to be processed in the current device in S112 is implemented by comparing a different unique pattern (combined with 0, 1) for each device with the currently received packet pattern.

If the pattern matches, the packet is valid. If the pattern does not match, the packet is considered invalid. If it is determined in S114 whether or not the packet is valid according to S112, the wakeup switch is activated (S116). If the packet is invalid, the packet is dropped (S118).

On the other hand, when comparing with a unique pattern different from device to device, when a broadcast pattern (for example, '00000000' '11111111') is received, it is processed as a valid pattern without performing a comparison step.

When the packet is valid and the wakeup switch is activated, the packet is transmitted to the application processor (S120), and the actuator is driven according to the control signal of the application processor (S122).

In the present invention, the operation means that different functions are performed for each device type according to a predetermined algorithm.

As described above, the home network system according to the present invention determines whether the event to be processed in the current device in advance in the MAC layer before delivering the packet to the application processing unit to supply power in case of the event to be processed in the current device. If the device is not an event to be processed, the device is kept in the idle state. Thus, even if a conventional unrelated event is received, the user can wake up unconditionally and supply power to solve the conventional problem of determining the validity.

The present invention is very useful in a wireless home network system that is sensitive to low power design.

Claims (9)

A transceiver for converting a signal received from the outside into an internal signal and transmitting the internal signal to the outside; A packet frame reading unit determining a validity of a packet received by the transceiver; A wake-up switch whose on / off state is changed according to a result of the packet frame reading unit; And And an application processor for receiving a packet and processing packet data when the wake-up switch is turned on. The method of claim 1, wherein the packet frame reading unit An apparatus for selective packet reception in a wireless network, comprising comparing a pattern recorded in a pattern field in a received packet with a device-specific pattern for device identification. The method of claim 2, wherein the device-specific pattern is Optional packet receiving apparatus of a wireless network, characterized in that the predetermined pattern in advance in addition to the device initial value setting. The method of claim 2, wherein the device-specific pattern is Optional packet receiving apparatus of a wireless network, characterized in that the user directly set. The method of claim 2, wherein the device-specific pattern is Optional packet receiving apparatus of a wireless network, characterized in that it includes a pattern used when broadcasting to all devices. The method of claim 2, wherein the device-specific pattern is Optional packet receiving apparatus of a wireless network, characterized in that recorded in the header field of the packet frame. Receiving an event signal in an idle state; Comparing the pattern recorded in the pattern field of the packet including the event signal with a predefined device-specific pattern to determine the validity of the packet; If both patterns match, considering the device as an event to be processed, switching the device to the active mode and delivering a packet to the application processing unit; And Selective packet receiving method of a wireless network comprising the step of performing the operation according to a set of algorithms determined by the application processing unit. The method of claim 7, wherein in determining the validity of the packet, Selective packet reception method of a wireless network, characterized in that the comparison including the predefined device-specific pattern and broadcast pattern of the received packet. The method of claim 7, wherein In determining the validity of the packet, if it is determined that both patterns do not match, Dropping the packet further comprises the step of receiving a selective packet in a wireless network.

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