KR20080069092A - Apparatus for operating sleep mode in multi-hop network and method thereof - Google Patents

Abstract

An apparatus and a method for operating a sleep mode in a multi-hop network are provided to solve a problem that a mobile terminal repeats alternately a sleeping interval with a listening interval wherein in the sleeping interval the mobile terminal does not monitor a channel but in the listening interval the mobile monitors a wireless channel. A method for operating a sleep mode in a multi-hop network comprises the following several steps. A mobile terminal generates a sleep mode request message and transmits the generated sleep mode request message to a repeater(S210). The repeater receives the sleep mode request message and transmits the received sleep mode request message to a base station(S220). The base station receives the sleep mode request message, generates a sleep mode response message in response to the request message, and transmits the generated sleep mode response message to the repeater(S230). The repeater receives the sleep mode response message and transmits the sleep mode response message to the mobile terminal(S240). The mobile terminal receives the sleep mode response message and operates a sleep mode on the basis of the received sleep mode response message. The base station receives a data traffic whose destination is the mobile terminal(S260). The base station stores the received data traffic at a memory and transmits the received data traffic to the repeater(S270). The base station generates a traffic instruction message and transmits the generated traffic instruction message to the repeater(S280). The repeater receives the traffic instruction message and transmits the received traffic instruction message to the mobile terminal(S290). If the mobile terminal receives the traffic instruction message, the mobile terminal switches the sleep mode to an activation mode.

Description

Apparatus and method for operating sleep mode in multi-hop network {APPARATUS FOR OPERATING SLEEP MODE IN MULTI-HOP NETWORK AND METHOD THEREOF}

1 is a block diagram illustrating a multi-hop network according to an embodiment of the present invention.

2 is a flowchart illustrating a method for operating a sleep mode according to a first embodiment of the present invention.

3 is a flowchart illustrating a method for operating a sleep mode according to a second embodiment of the present invention.

4 is a flowchart illustrating a method for operating a sleep mode according to a third embodiment of the present invention.

5 is a block diagram illustrating a repeater for operating a sleep mode according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: multi-hop network

110: base station

120, 500: repeater

130: mobile terminal

510: message generating unit

520: message analyzer

530: memory

540: transceiver

The present invention relates to a multi-hop network, and more particularly, to an apparatus and method for operating a sleep mode in a multi-hop network that enables to effectively operate a sleep mode of a mobile terminal. It is about.

As the demand for data transmission using the wireless communication system increases, various researches are being conducted to more efficiently transmit data traffic. In particular, research on a multi-hop network that can reduce the loss of data traffic using a multi-channel as well as increase the resource usage efficiency is being actively conducted.

It is time to research how to operate the sleep mode that should be considered in such a multi-hop network. Unlike the process of setting the sleep mode between the mobile terminal and the base station, the overall system performance depends greatly on the method. Can be.

The mobile terminal uses a sleep mode to efficiently use battery power, and the sleep mode may alternately repeat a sleeping interval in which the mobile terminal does not monitor the wireless channel and a listening interval in which the mobile channel is monitored. That is, the mobile terminal can minimize power consumption in the sleeping interval.

However, since there are no specific methods for controlling the sleep mode of the mobile terminal through at least one repeater between the mobile terminal and the base station in a multi-hop network, efforts for this will continue. .

The present invention has been made to solve the above problems, in the multi-hop network (Multi-Hop Network) by controlling the sleep mode (sleep mode) through at least one repeater between the mobile station and the base station, An object of the present invention is to provide an apparatus and a method for operating the sleep mode in a multi-hop network which enables the mobile terminal to operate the sleep mode.

In order to achieve the above object, a method for operating a sleep mode in a multi-hop network according to an embodiment of the present invention is based on a sleep mode response message received from a repeater by a mobile terminal in response to a sleep mode request message. Operating a sleep mode, a base station receiving and storing data traffic destined for the mobile terminal as a destination address, and when the repeater receives the data traffic from the base station, storing the received data traffic and And generating a traffic indication message for notifying that the stored data traffic exists and transmitting the same to the mobile terminal.

In order to achieve the above object, a method for operating a sleep mode in a multi-hop network according to an embodiment of the present invention transmits a sleep mode response message to the mobile terminal in response to the sleep mode request message of the mobile terminal. Receiving data traffic from the base station to the mobile station as a destination address; and upon receiving data traffic from the base station, a traffic indication for storing the received data traffic and indicating that the stored data traffic is present. Generating a message and transmitting the message to the mobile terminal.

In order to achieve the above object, a system for operating a sleep mode according to an embodiment of the present invention, a mobile terminal operating a sleep mode based on a sleep mode response message received in response to a sleep mode request message, the mobile A base station for receiving and storing data traffic having a terminal as a destination address, and generating the traffic indication message for storing the received data traffic and notifying that the stored data traffic exists when the data traffic is received from the base station. It characterized in that it comprises a repeater for transmitting to the mobile terminal.

In order to achieve the above object, a repeater for operating a sleep mode according to an embodiment of the present invention receives a sleep mode request message from a mobile terminal and generates a sleep mode response message in response to the received sleep mode request message. And a transceiver for transmitting to the mobile terminal, a message analyzer for analyzing the transmitted and received messages, and a memory for storing the received data traffic upon receiving data traffic from a base station according to the analysis result. .

Hereinafter, with reference to the accompanying drawings and the contents described in the accompanying drawings will be described in detail preferred embodiments of the present invention, but the present invention is not limited or restricted by the embodiments. Like reference numerals in the drawings denote like elements.

1 is a block diagram illustrating a multi-hop network 100 according to an embodiment of the present invention.

As shown in FIG. 1, the multi-hop network 100 according to an embodiment of the present invention may include a base station (BS) 110, a relay station (RS) 120, and a mobile terminal ( Mobile Station: MS) 130. Since the multi-hop network 100 can transmit data traffic from the base station 110 to the mobile terminal 130 through multi-hop or multi-channel, the multi-hop network 100 has a relatively wider service range than the existing service range. Can be.

The repeater 120 may configure a multi-hop between the base station 110 and the mobile terminal 130. Through the plurality of multi-hops configured as described above, the repeater 120 may not only solve the shadow area, but also improve the transmission rate and extend the service range.

The mobile terminal 130 may receive the sleep mode response message in response to the sleep mode request message for requesting the sleep mode, and operate the sleep mode based on the received sleep mode response message.

The base station 110 may receive and store data traffic using the mobile terminal 130 as a destination address.

When the repeater 120 receives and stores data traffic from the base station 110, the repeater 120 may generate a traffic indication message for notifying that the stored data traffic exists and transmit the same to the mobile terminal 130.

Various methods for operating a sleep mode in a multi-hop network according to the present invention configured as described above are presented. The method according to the present invention describes the operation principle of operating the sleep mode through a repeater between the base station and the mobile terminal constituting a multi-hop network, but is not limited to this multi-hop, that is, at least one repeater It may include.

Methods according to the present invention can be classified according to the role of the repeater, largely 1) a method of simply performing a relay role between the base station and the mobile terminal, 2) a method performed in place of the role of the base station, and 3) the role of the base station It can be divided into a method of performing in place of and reporting whether the sleep mode operation to the base station. This will be described with reference to FIGS. 2 to 4.

2 is a flowchart illustrating a method for operating a sleep mode according to a first embodiment of the present invention.

As shown in FIG. 2, in the method for operating the sleep mode according to the first embodiment of the present invention, the mobile terminal transmits a sleep mode request message to the repeater (S210), and the repeater transmits the sleep mode request message to the base station. Transmitting (S220), the base station transmitting a sleep mode response message to the repeater (S230), the repeater transmitting a sleep mode response message to the mobile terminal (S240), and operating the sleep mode by the mobile terminal. (S250), the base station receives the data traffic (S260), the base station transmits the data traffic to the repeater (S270), the base station sends a traffic indication message to the repeater (S280), and the repeater indicates the traffic And transmitting the message to the mobile terminal (S290).

The method for operating the sleep mode according to the first embodiment of the present invention thus made will now be described in detail.

First, the mobile terminal 130 may operate a sleep mode to efficiently use battery power while operating an activation mode for normally transmitting and receiving data traffic. The mobile terminal 130 may generate the sleep mode request message MOB_SLP_REQ for requesting the sleep mode and transmit the sleep mode request message MOB_SLP_REQ generated to the relay 120 (S210).

In this case, the sleep mode request message MOB_SLP_REQ may not only include a maximum sleeping interval, a minimum sleeping interval, and a listening interval set by the mobile terminal 130, but also a listening interval. It may include a hop count indicating the number of repeaters to measure the delay time existing between the 130 and the base station 110.

The sleep mode request message MOB_SLP_REQ according to the present invention is not limited to including a hop count indicating the number of repeaters, and is used to indicate various factors that may cause a delay time between the base station 110 and the mobile terminal 130. It may include at least one parameter.

The repeater 120 may receive the sleep mode request message MOB_SLP_REQ and transmit it to the base station 110 (S220).

In this case, the repeater 120 is to consider a delay time caused by the repeater 120, which may increase the hop count included in the received sleep mode request message MOB_SLP_REQ by one. For example, when two repeaters are used, since two more frames are generated between the mobile terminal 130 and the base station 110, a delay time as much as a time period of two frames may occur.

The base station 110 may receive the sleep mode request message MOB_SLP_REQ and generate the sleep mode response message MOB_SLP_RSP in response to the received sleep mode request message MOB_SLP_REQ and transmit the generated sleep mode response message MOB_SLP_RSP to the relay 120 (S230). ).

In this case, the base station 110 may determine the maximum sleeping interval, the minimum sleeping interval, the listening interval, and the starting time of the sleeping interval in consideration of the hop count included in the received sleep mode request message MOB_SLP_REQ. In other words, as the hop count increases, the listening interval may increase.

Accordingly, the sleep mode response message MOB_SLP_RSP may include a maximum sleeping interval, a minimum sleeping interval, a listening interval, and a start time of the sleeping interval set by the base station 110.

The repeater 120 may receive the sleep mode response message MOB_SLP_RSP and transmit it to the mobile terminal 130 (S240).

When the mobile terminal 130 receives the sleep mode response message MOB_SLP_RSP, the mobile terminal 130 may operate the sleep mode based on the received sleep mode response message MOB_SLP_RSP (S250). That is, the mobile terminal 130 may switch from the activation mode to the sleep mode, alternately repeat the sleeping interval and the listening interval based on the sleep mode response message MOB_SLP_RSP, and monitor the wireless channel at the listening interval.

Thereafter, the base station 110 may receive data traffic using the mobile terminal 130 as a destination address (S260).

When the base station 110 receives the data traffic, the base station 110 may store the received data traffic in the memory and then transmit the stored data traffic to the relay 120 (S270). When the relay 120 receives data traffic from the base station 110, the repeater 120 may store the received data traffic in a memory.

In this case, the base station 110 and the repeater 120 may store the data traffic in the memory for a preset time and delete the data traffic stored in the memory after the preset time elapses. This reason is to prevent data traffic loss due to handover of the mobile terminal.

The base station 110 may transmit the traffic indication message MOB_TRF_IND generated by generating the traffic indication message MOB_TRF_IND after transmitting the data traffic to the relay 120 (S280).

The repeater 120 may receive the traffic indication message MOB_TRF_IND and transmit it to the mobile terminal 130 (S290).

As a result, when receiving the traffic indication message MOB_TRF_IND, the mobile terminal 130 may operate the activation mode. That is, the mobile terminal 130 may switch from the sleep mode to the activation mode by determining that there is data traffic to receive based on the received traffic indication message MOB_TRF_IND.

3 is a flowchart illustrating a method for operating a sleep mode according to a second embodiment of the present invention.

As shown in FIG. 3, in the method for operating the sleep mode according to the second embodiment of the present invention, the mobile terminal transmits a sleep mode request message to the repeater (S310), and the repeater moves the sleep mode response message. Transmitting to the terminal (S320), operating a sleep mode of the mobile terminal (S330), receiving data traffic of the base station (S340), transmitting the data traffic to the repeater by the base station (S350), and the repeater The method may include transmitting a traffic indication message to the mobile terminal (S360).

The method for operating the sleep mode according to the second embodiment of the present invention thus made will now be described in detail.

First, the mobile terminal 130 may transmit the sleep mode request message MOB_SLP_REQ generated by generating the sleep mode request message MOB_SLP_REQ for requesting the sleep mode to the relay 120 (S310).

The relay 120 may receive the sleep mode request message MOB_SLP_REQ and generate a sleep mode response message MOB_SLP_RSP in response to the received sleep mode request message MOB_SLP_REQ and transmit the generated sleep mode response message MOB_SLP_RSP to the mobile terminal 130 ( S320).

In this case, the repeater 120 may determine the maximum sleeping interval, the minimum sleeping interval, the listening interval, and the start time of the sleeping interval in consideration of the hop count included in the received sleep mode request message MOB_SLP_REQ.

When the mobile terminal 130 receives the sleep mode response message MOB_SLP_RSP, the mobile terminal 130 may operate the sleep mode based on the received sleep mode response message MOB_SLP_RSP (S330). That is, the mobile terminal 130 may switch from the activation mode to the sleep mode.

In this case, the base station 110 may not have information related to the state of the mobile terminal 130, that is, the sleep mode. However, since the mobile terminal 130 receives the sleep mode response message from the repeater 120 except for the base station 110, the sleeping interval may be long, thereby reducing power consumption.

Thereafter, the base station 110 may receive data traffic using the mobile terminal 130 as a destination address (S340).

When the base station 110 receives the data traffic, the base station 110 may store the received data traffic in the memory and then transmit the stored data traffic to the relay 120 (S350). When the relay 120 receives data traffic from the base station 110, the repeater 120 may store the received data traffic in a memory.

After storing the data traffic, the relay 120 may generate the traffic indication message MOB_TRF_IND and transmit the generated traffic indication message MOB_TRF_IND to the mobile terminal 130 (S360).

As a result, when receiving the traffic indication message MOB_TRF_IND, the mobile terminal 130 may operate the activation mode. That is, the mobile terminal can switch from the sleep mode to the activation mode.

4 is a flowchart illustrating a method for operating a sleep mode according to a third embodiment of the present invention.

As shown in FIG. 4, in the method for operating the sleep mode according to the third embodiment of the present disclosure, the mobile terminal transmits a sleep mode request message to the repeater (S410), and the repeater moves the sleep mode response message. Transmitting to a terminal (S420), transmitting a sleep mode report message to a base station by a repeater (S430), operating a sleep mode by a mobile terminal (S440), receiving a data traffic by a base station (S450), The base station transmits the data traffic to the repeater (S460), and the repeater transmits the traffic indication message to the mobile terminal (S470).

The method for operating the sleep mode according to the third embodiment of the present invention made as described above will be described in detail as follows.

First, the mobile terminal 130 may transmit the sleep mode request message MOB_SLP_REQ generated by generating the sleep mode request message MOB_SLP_REQ for requesting the sleep mode to the relay 120 (S410).

The relay 120 may receive the sleep mode request message MOB_SLP_REQ and generate a sleep mode response message MOB_SLP_RSP in response to the received sleep mode request message MOB_SLP_REQ and transmit the generated sleep mode response message MOB_SLP_RSP to the mobile terminal 130 ( S420).

In this case, the base station 110 may determine the maximum sleeping interval, the minimum sleeping interval, the listening interval, and the start time of the sleeping interval in consideration of the hop count included in the received sleep mode request message MOB_SLP_REQ.

The repeater 120 may generate a sleep mode report message for reporting the sleep mode and transmit the generated sleep mode report message to the base station 110 (S430). Through this, the base station 110 may have information related to the status of the mobile terminal 130, that is, the sleep mode.

In this case, the base station 110 may not only properly respond to the handover based on the state of the mobile terminal 130, but also the mobile terminal 130 receives the sleep mode response message from the repeater 120 except for the base station 110. As a result, the sleeping interval can be lengthened and power consumption can be reduced accordingly.

When the mobile terminal 130 receives the sleep mode response message MOB_SLP_RSP, the mobile terminal 130 may operate the sleep mode based on the received sleep mode response message MOB_SLP_RSP (S440). That is, the mobile terminal 130 may switch from the activation mode to the sleep mode.

Thereafter, the base station 110 may receive data traffic using the mobile terminal 130 as a destination address (S450).

When the base station 110 receives the data traffic, the base station 110 may store the received data traffic in the memory and then transmit the stored data traffic to the relay 120 (S460). When the relay 120 receives data traffic from the base station 110, the repeater 120 may store the received data traffic in a memory.

After storing the data traffic, the relay 120 may generate the traffic indication message MOB_TRF_IND and transmit the generated traffic indication message MOB_TRF_IND to the mobile terminal 130 (S470).

As a result, when the mobile terminal receives the traffic indication message MOB_TRF_IND, it can operate the activation mode. That is, the mobile terminal can switch from the sleep mode to the activation mode.

5 is a block diagram illustrating a repeater for operating a sleep mode according to an embodiment of the present invention.

As illustrated in FIG. 5, a repeater for operating a sleep mode according to an embodiment of the present invention may include a message generator 510, a message analyzer 520, a memory 530, and a transceiver 540. It may include.

The transceiver 540 may receive a sleep mode request message from the mobile terminal 130 and transmit a sleep mode response message to the mobile terminal 130 in response to the sleep mode request message. When the transceiver 540 receives data traffic from the base station 110, the transceiver 540 may transmit the received data traffic to the mobile terminal 130 as well as the traffic indication message.

The memory 530 may store data traffic received from the base station 110 for a preset time.

The message analyzer 520 may analyze the received messages. When the message generator 510 receives the data traffic, the message generator 520 generates a traffic indication message for indicating that the received data traffic exists. The generated traffic indication message may be transmitted to the mobile terminal 130 through the transceiver 540.

In addition, the message generator 510 may generate a traffic indication message according to the analysis result.

Although a multi-hop network according to an embodiment of the present invention can be used in a wireless communication system, the multi-hop network can be suitably applied to a repeater constituting a multi-hop not only in the wireless communication network but also in a wired communication network and a wired / wireless combination network. Can be.

An embodiment of the present invention may include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, local data files, local data structures, or the like, alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler.

Although specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As can be seen from the above description, an apparatus and method for operating a sleep mode in a multi-hop network according to an embodiment of the present invention and a method for a mobile terminal in a multi-hop network By controlling the sleep mode through at least one repeater between the base station and the base station, the sleep mode of the mobile terminal can be efficiently operated.

Claims (30)

Operating, by the mobile terminal, a sleep mode based on a sleep mode response message received from the repeater in response to the sleep mode request message; A base station receiving and storing data traffic using the mobile terminal as a destination address; And When the repeater receives the data traffic from the base station, generating a traffic indication message for storing the received data traffic and notifying that the stored data traffic exists and transmitting it to the mobile terminal. Sleep mode operation method comprising a. According to claim 1, The sleep mode request message is Hop count indicating the maximum sleeping interval, the minimum sleeping interval, the listening interval set by the mobile terminal, and the number of repeaters existing between the base station and the mobile terminal. Sleep mode operation method comprising a. The method of claim 2, The hop count is, Set to be incremented by 1 for each repeater receiving the sleep mode request message Sleep mode operation method characterized in that. The method of claim 2, The sleep mode response message, Start time of maximum sleeping interval, minimum sleeping interval, listening interval, and sleeping interval set by the base station based on the hop count; Sleep mode operating method comprising a. The method of claim 4, wherein The hop count is, The listening interval is set to be longer as the value of the hop count is larger Sleep mode operation method characterized in that. According to claim 1, The data traffic received at the base station and the repeater is deleted after being stored for a preset time Sleep mode operation method characterized in that. According to claim 1, Operating the sleep mode, Generating, by the mobile terminal, a sleep mode request message for requesting a sleep mode, and transmitting the sleep mode request message to the repeater; Receiving, by the repeater, the sleep mode request message to a base station; Generating, by the base station, a sleep mode response message in response to the sleep mode request message, and transmitting the sleep mode response message to the repeater; Receiving, by the repeater, the sleep mode response message to a mobile terminal; And Operating, by the mobile terminal, a sleep mode based on the sleep mode response message; Sleep mode operation method characterized in that. According to claim 1, Operating the sleep mode, Generating, by the mobile terminal, a sleep mode request message for requesting a sleep mode, and transmitting the sleep mode request message to the repeater; Generating, by the relay, a sleep mode response message to the mobile terminal in response to the sleep mode request message; And The mobile terminal operating a sleep mode based on a sleep mode response message; Sleep mode operation method characterized in that. According to claim 1, Operating the sleep mode, Generating, by the mobile terminal, a sleep mode request message for requesting a sleep mode, and transmitting the sleep mode request message to the repeater; Generating, by the repeater, a sleep mode response message in response to the sleep mode request message to the mobile terminal; Generating, by the repeater, a sleep mode report message for reporting a sleep mode of the mobile terminal to the base station; And Operating, by the mobile terminal, a sleep mode based on the sleep mode response message; Sleep mode operation method characterized in that. According to claim 1, When the base station receives data traffic with the mobile terminal as a destination address, storing the received data traffic and transmitting the stored data traffic to the repeater Sleep mode operation method further comprising. Transmitting a sleep mode response message to the mobile terminal in response to the sleep mode request message of the mobile terminal; Receiving data traffic from a base station to the mobile station as a destination address; And When receiving the data traffic from the base station, generating a traffic indication message for storing the received data traffic and indicating that the stored data traffic is present and transmitting to the mobile terminal Sleep mode operation method comprising a. The method of claim 11, wherein The step of transmitting the sleep mode response message to the mobile terminal, Receiving a sleep mode request message for requesting a sleep mode from the mobile terminal; Receiving the sleep mode request message and transmitting the received sleep mode request message to the base station; Receiving a sleep mode response message from the base station in response to the sleep mode request message; And Receiving the sleep mode response message and transmitting the received sleep mode response message to the mobile terminal; Sleep mode operation method characterized in that. The method of claim 11, wherein The step of transmitting the sleep mode response message to the mobile terminal, Receiving a sleep mode request message for requesting a sleep mode from the mobile terminal; And Generating the sleep mode response message in response to the sleep mode request message and transmitting the generated sleep mode response message to the mobile terminal; Sleep mode operation method characterized in that. The method of claim 11, wherein The step of transmitting the sleep mode response message to the mobile terminal, Receiving a sleep mode request message for requesting a sleep mode from the mobile terminal; Generating and transmitting the sleep mode response message to the mobile terminal in response to the received sleep mode request message; And Generating a sleep mode report message for reporting a sleep mode of the mobile terminal and transmitting the sleep mode report message to the base station; Sleep mode operation method characterized in that. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1 to 14. A mobile terminal operating a sleep mode based on a sleep mode response message received in response to a sleep mode request message; A base station for receiving and storing data traffic whose destination address is the mobile terminal; And Upon receiving the data traffic from the base station, a repeater for storing the received data traffic and generating a traffic indication message to inform the existence of the stored data traffic to the mobile terminal System comprising a. The method of claim 16, The sleep mode request message is Hop count means the maximum sleeping interval, the minimum sleeping interval, the listening interval set by the mobile terminal, and the number of repeaters existing between the base station and the mobile terminal. System comprising a. The method of claim 17, The hop count is, Set to be incremented by 1 for each repeater receiving the sleep mode request message System characterized in that. The method of claim 17, The sleep mode response message, Start time of maximum sleeping interval, minimum sleeping interval, listening interval, and sleeping interval set by the base station based on the hop count; System comprising a. The method of claim 19, The hop count is, The listening interval is set to be longer as the value of the hop count is larger System characterized in that. The method of claim 16, The data traffic received at the base station and the repeater is deleted after being stored for a preset time System characterized in that. The method of claim 16, The repeater, Receiving the sleep mode request message for requesting the sleep mode from the mobile terminal and transmitting the sleep mode request message to the base station, and transmitting the sleep mode response message to the mobile terminal in response to the sleep mode request message from the base station; System characterized in that. The method of claim 16, The repeater, Receiving the sleep mode request message for requesting the sleep mode from the mobile terminal, and generating and sending the sleep mode response message to the mobile terminal in response to the received sleep mode request message; System characterized in that. The method of claim 16, The repeater, Receiving a sleep mode request message for requesting the sleep mode from the mobile terminal, generating and transmitting the sleep mode response message to the mobile terminal in response to the received sleep mode request message; Generating and transmitting a sleep mode report message for reporting a sleep mode of the mobile terminal to the base station; System characterized in that. A transceiver for receiving a sleep mode request message from a mobile terminal and transmitting a sleep mode response message to the mobile terminal in response to the received sleep mode request message; A message analyzer analyzing the transmitted and received messages; And Memory for storing the received data traffic when receiving the data traffic from the base station according to the analysis result Repeater comprising a. The method of claim 25, The transceiver unit, Receiving the sleep mode request message for requesting the sleep mode from the mobile terminal and transmitting the received sleep mode request message to the base station, Receiving the sleep mode response message in response to the sleep mode request message from the base station and transmitting the sleep mode response message to the mobile terminal; Repeater characterized in that. The method of claim 25, When the sleep mode request message is received according to the analysis result, the message generation unit generating the sleep mode response message in response to the received sleep mode request message and inputting it to the transceiver. More, When the transceiver receives the sleep mode request message from the mobile terminal, transmits a sleep mode response message input from the message generator to the mobile terminal; Repeater characterized in that. The method of claim 27, The message generator, When receiving the data traffic according to the analysis result, generating a traffic indication message for indicating that the received data traffic exists and inputs to the transceiver Repeater characterized in that. The method of claim 25, Upon receiving the sleep mode request message according to a result of the analysis, a sleep mode report for generating the sleep mode response message in response to the received sleep mode request message and inputting the sleep mode response message to report the sleep mode The message generator to generate a message and input the message to the transceiver More, When the transceiver receives a sleep mode request message from the mobile terminal, the transceiver transmits a sleep mode response message input from the message generator to the mobile terminal and then transmits a sleep mode report message input from the message generator to the base station. that Repeater characterized in that. The method of claim 29, The message generator, When receiving the data traffic according to the analysis result, generating a traffic indication message for indicating that the received data traffic exists and inputs to the transceiver Repeater characterized in that.

Images