JP2003273882A - Radio communication module with connectionless broadcast for activating radio communication device in park mode as base and method for activating radio communication device in park mode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication mode with a connectionless broad cast for activating a radio communication device in a park mode as a base, and to provide a method for activating the radio communication device in the park mode. <P>SOLUTION: The radio communication mode with the connectionless broadcast for activating the radio communication device in the parking mode as the base comprises a synchronous information transfer unit 150 for broadcasting synchronous information, including a Bluetooth terminal address and clock information, a variable setter 110 for setting a window variable including a size and a repeating number of random access window, an information generator 120 for generating window support information as to whether the random access window is supported, and a window managing unit 130 for activating or non- activating the random access window generated, based on the polling access window and the window variable. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connectionless broadcast-based wireless communication module capable of activating a wireless communication device in a park mode and a method for activating a wireless communication device in a park mode. The present invention relates to a wireless communication module capable of communicating when a Bluetooth device in a park mode moves from an arbitrary piconet to another piconet and capable of switching to an active mode, and a method of converting from a park mode to an active mode.

[0002]

2. Description of the Related Art Bluetooth private network (Pe
rsonal Area Network;
AN ". ) A Bluetooth terminal (PAN User; hereinafter referred to as "PANU") supporting the profile is activated as needed or by a master device.
The state can be changed from a park mode to a park mode.

An activation channel (wake) for activating a Bluetooth terminal in a conventional park mode.
up channel) is a beacon slot (bea).
con slot and the connection window (access
window). According to the Bluetooth standard proposal, a Bluetooth terminal in park mode has a polling access technology.
It is possible to switch to the active mode through the ss technique). That is, the Bluetooth terminal in the park mode can request the mode change to the master only when the connection window is opened and the mode change request is received, and the Bluetooth terminal in the park mode receives the request from the master. It is switched to the active mode by the polling message.

However, when a Bluetooth terminal in park mode moves from one piconet to another piconet, there may be a problem with activation of this Bluetooth terminal. That is, the Bluetooth terminal that has proceeded to the park mode in synchronization with the existing master,
Although it always tries to switch to the active mode according to the clock of this existing master, the Bluetooth terminal that has proceeded to the park mode in this way is a new piconet that is already operating according to the clock of the new master. It is not possible to easily enter the active mode because it has proceeded to. Therefore, there is a need for a method of setting a direct connection with a new master so that the Bluetooth terminal in the park mode can proceed from the park mode to the active mode regardless of the existing master.

On the other hand, when a Bluetooth terminal moves from one piconet to another piconet, it becomes necessary to go through a process of connection setting to become a new piconet component in order to be able to transfer data. . Bluetooth PAN working group and location information working group (Local Position)
The ing Working Group) discusses the need for a relatively large amount of information to be exchanged and broadcast before masters and slaves are determined.

A Bluetooth terminal supporting a Bluetooth private network profile is a Bluetooth network connection device (Network Access Device).
It is necessary to collect location information from the Point (NAP). In addition, as the Bluetooth terminals move, the number of Bluetooth terminals carried by each NAP changes frequently, so that the NAP is the OSI layer 2 (data).
link layer) and layer 3 (network l)
It is necessary to periodically broadcast the information of the (ayer).

According to Bluetooth standard 1.1 known in the art, a Bluetooth device is a connection-oriented system in which a relatively large amount of time is spent setting up a connection before transferring data. The broadcasting of that information can be done after the connection is set up between the terminals. Also, the Bluetooth terminal uses a relatively large amount of radio resources due to the handover that occurs when moving from one piconet to another piconet. For example, some NAPs in a spontaneous handover need to perform a paging procedure for the handover to only one Bluetooth terminal. However, in the process of paging, the NAP has to interrupt the service for a relatively long time with respect to the Bluetooth terminal which is already connected and has received the service.

[0008] Such interruption of service tends to cause a problem that the service cannot be supported in real time. However, since most Bluetooth terminals are in idle mode,
Performing a handover every time a Bluetooth terminal moves leads to a waste of radio resources. That is,
On the NAP side, it may be sufficient if the location of the idle Bluetooth terminal is roughly known.

However, in the Bluetooth system, the information can be broadcast only under the situation where the piconet composed of the master and the slave is determined. Therefore, in order to support the broadcasting before executing the connection setting procedure. Method is necessary.

For this reason, Phillips
s) is an inquiry process (inquiry p
process), a method of extending an ID packet to broadcast the position information has been proposed.
However, this method of extending the ID packet causes a problem when the broadcast information is transmitted by being divided into a plurality of packets.

That is, the position information included in the ID packet (Extended IDentifier packet: EID packet) thus extended is about 300 bytes, and the connection point (Access Point) is determined by the IP layer handover protocol. Notification message periodically (advertisementm
message), but
The problem arises how to efficiently arrange such a broadcast message.

On the other hand, the ID packet extension method has a problem that it takes a very long time because the packet in each slot needs to be repeated for every 16 hopping frequencies. In addition, this ID packet extension method uses EID
By receiving the packet, it is necessary to receive the information at the same time as synchronizing with the NAP. Therefore, even if one ID packet is mistakenly received, it is included in this ID packet as compared with the case of receiving the information after the synchronization. Information is lost, and as a result it is impossible to reconstruct the entire broadcast information.

In order to overcome such a problem, Widcom Co., Ltd. uses NA in EID packets.
P's Bluetooth terminal address (Bluetooth
Device Address; BD_ADDR)
He proposed a measure that added clock information. According to the measure proposed by Widcom, the Bluetooth terminal which has received the ID packet is B included in the ID packet.
Applicable NAP using D_ADDR and clock information
Will be able to sync with. Such a process can support faster handover.
However, even if such a method is used, the Bluetooth terminal needs to execute a response to the received packet for connection setting, and therefore it takes a long time to reach a state where data transfer is possible. There is a problem.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a connectionless broadcast capable of activating a device in a park mode. Based,
A wireless communication module and a method of activating a wireless communication device in a park mode.

[0015]

A wireless communication module according to the present invention for achieving the above object supports a random access window, and a variable setting unit for setting a window variable including the size of the random access window and the number of repetitions. And a window management unit for activating and deactivating the polling access window and the random access window generated based on the window variable. And

Preferably, the window support information is
Transferred through a beacon slot, the polling access window and the random access window are activated after the end of the beacon slot in which the window assistance information is transferred. Also, the activation information is preferably implemented by a link management protocol. Further, it is preferable that the polling access window and the random access window are activated at the same time.

Meanwhile, the polling access window and the random access window may be sequentially activated according to the time interval. At this time, it is preferable that the window variable further includes a predetermined time interval. The random access window is composed of a plurality of slots, and the slots support synchronous connection type links.

[0018] Preferably, the apparatus further comprises an activation unit that transfers an activation message to the external communication device when receiving the connection request message transferred from the external communication device in response to the window support information. . At this time, the connection request message includes a Bluetooth terminal address of the external communication device. Also, the connection request message is received after the number of time slots selected from 0 to the size of the random access window × 2 has elapsed.

Preferably, when there is a packet to be transferred to the external communication device, the activation unit transfers the activation message including a Bluetooth terminal address of the external communication device. At this time, the activation message is transferred through the beacon slot.

Preferably, a synchronization information transfer unit for broadcasting synchronization information including a Bluetooth terminal address and clock information, and, after transferring the synchronization information,
A packet transfer unit that transfers a broadcast data packet including a channel connection code, a packet header, and a payload is further provided, and the window management unit transfers the synchronization information and the broadcast data packet, and then, the polling access window, and the Activate the random access window. At this time, the synchronization information and the broadcast data packet are transferred through a beacon window and a broadcast window, respectively.

[0021] A method of activating a wireless communication device in a park mode according to the present invention for achieving the above-mentioned other technical problem, comprises transferring window support information as to whether or not to support a random access window, Activating the random access window generated based on a polling access window and a predetermined window variable; receiving a connection request from an external communication device through the random access window; and activating the external communication device. Forwarding the message.

Preferably, the window support information is transferred through a beacon slot. Also, the polling access window and the random access window are activated after the beacon slot in which the window support information is transferred is completed.

Meanwhile, the activation information is embodied by a link management protocol. Preferably, the polling access window and the random access window are activated at the same time. On the other hand, the polling access window and the random access window may be activated sequentially according to the time interval, the window variable further including a predetermined time interval.

Preferably, the polling access window is composed of a plurality of slots, and the slots support synchronous connection type links. In addition, the connection request message includes a Bluetooth terminal address of the external communication device, and the connection request message has a number of time slots selected from 0 to the size of the random access window × 2. Desirable to be received.

When there is a packet to be transferred to the external communication device, it is preferable that the activation message including the Bluetooth terminal address of the external communication device is transferred through a beacon slot.
The method further includes a step before the window support information transfer step and a step of synchronizing the external communication device. Preferably, the synchronizing step broadcasts synchronization information including Bluetooth terminal address and clock information, and after transmitting the synchronization information, transmits a broadcast data packet including a channel connection code, a packet header and a payload. And a step of performing. At this time, the synchronization information and the broadcast data packet are transferred through a beacon window and a broadcast window, respectively.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

FIG. 1 is a block diagram showing a configuration of an embodiment of a Bluetooth module based on a connectionless broadcast capable of activating a device in a park mode according to the present invention. As shown in FIG. 1, the Bluetooth module 100 according to the present invention is
The variable setting unit 110, the information generation unit 120, the window management unit 130, the activation unit 140, the synchronization information transfer unit 150, the packet transfer unit 160, and the control unit 170 are included.

The variable setting unit 110 sets a window variable including the size of the random access window and the number of iterations. Such variables are used for connectionless broadcast channels (connecti
onless broadcast channel)
Through the activation channel (wakeup channel)
el) is determined when broadcasting information for.

FIG. 2 is a schematic diagram showing the structure of a connectionless type activation channel. Sacc shown in FIG.
ess and Raccess are random access windows, respectively.
ow) and the number of iterations. The random access window is a polling access window.
It uses a re-transfer mechanism different from and can coexist with the polling access window.

The random access window and the polling access window may have different starting points, and when the starting points are different from each other, it is necessary to set a parameter value for the random access window offset. The slave-to-master slot in the random access window section has two 312.5 μs, like the general polling access window section.
It is configured by being divided into s sections.

The information generator 120 is for generating window support information as to whether or not to support a random access window. This window support information is
It is transmitted through the beacon slot. In addition to the existing functions, the beacon slot is provided with a notification regarding whether to support a random access window and a function of activating a Bluetooth terminal in a park mode using BD_ADDR.

Such a function is provided by a new link management protocol (Link Management Protocol).
col: LMP) message. And L that supports random access window
If there is no MP message, the connectionless Bluetooth terminal in park mode cannot use the random access period. In the beacon slot, the Bluetooth terminal receiving the corresponding LMP message goes into active mode.

On the other hand, the backbone
When the traffic that is transferred from the device to the connectionless Bluetooth terminal in the park mode reaches the NAP,
The NAP sends an activation LMP message containing the BD_ADDR of the Bluetooth terminal in the beacon slot. At this time, the connectionless Bluetooth terminal in the park mode may access the access request address (Access Request) assigned by the new NAP.
st Address (AR # ADDR) is not recognized, the new NAP uses the BD_ADDR of the Bluetooth terminal to activate (unpar).
k message) is generated.

The window manager 130 activates or deactivates the polling access window and the random access window generated based on the window variable. Then, when transferring the LMP that the NAP supports the random access in the beacon slot, the connection mode Bluetooth terminal in the park mode
The activation request can be voluntarily transmitted to the NAP using the random access period.

This Bluetooth terminal is from 0 to 2 × S
Any one of the access numbers (RAND) is generated. After that, from the start of the random access window, half time slots (ha
Wait until the lf time slot) arrives.
Then the Bluetooth terminal will enter BD_ in the upper slot.
Transfer an EID packet containing only ADDR.

The activation unit 140 transfers the activation message to the Bluetooth terminal when receiving the connection request message transferred from the Bluetooth terminal in response to the window support information. The Bluetooth terminal that has transferred the EID packet waits until the activation LMP message transferred from the NAP arrives.
If this activation LMP message arrives,
The Bluetooth terminal goes into active mode. On the other hand, if the activation LMP message does not arrive by the end of the random access window, the Bluetooth terminal performs the activation request procedure again in the next random access window.

Also, slots residing within the random access window can support SCO links. Then, similar to the polling access window system, the Bluetooth terminal can transfer the access request packet through the upper slot that follows only when the broadcast packet is received in the lower slot.

Furthermore, since the SCO packet is not a broadcast packet, the Bluetooth terminal is
When a CO packet is received, the activation request in the following upper slot is canceled. On the other hand, the NAP does not send the activation message if the next lower slot is reserved for the SCO packet.

The synchronization information transfer unit 150 broadcasts information about synchronization including the address of the Bluetooth terminal and clock information. Information about this synchronization is intended to be transferred through the beacon window. Then, the packet transfer unit 160 transfers the channel connection code,
Transfers a broadcast data packet including a packet header and payload. This broadcast data packet is to be transferred through the broadcast window.

The beacon window and the broadcast window form a connectionless broadcast channel. The beacon window is used for channel synchronization between transmitting and receiving terminals, and the broadcast window is used for transmitting broadcast information, as defined in the existing Bluetooth standard document. In order to receive this broadcast information, this Bluetooth terminal only needs to be in the inquiry scan state.

The control section 170 controls the operation of each component. The control unit 170 is provided in the Bluetooth module 100 here, but it is also possible to provide the control unit 170 in a host (not shown) that drives the Bluetooth module 100.

FIG. 3 is a diagram showing a hierarchical structure of a broadcast channel and time information. In this beacon window, the procedure similar to that of the inquiry is performed, and the broadcast information transmitted during the broadcast window is transmitted within one piconet through the same procedure as when it is broadcast. The Bluetooth terminal between the beacon window and the broadcast window does not need to respond to any packet it receives and therefore does not need a connection setup procedure. From this, the broadcast channel proposed by the present invention has a connectionless type characteristic.

For the synchronization process performed in the beacon window, the following method has been proposed by Philips, that is, this method is performed using an extended ID packet, This expanded ID
In order to distinguish the packet from the NAP ID packet,
Newly defined inquiry access code (Ded
icated Inquiry Access Cod
e; DIAC) is used. The information contained in this expanded ID is shown in Table 1 below.

[0044]

[Table 1]

As shown in Table 1, in the method proposed by Philips, service type, clock, B
D_ADDR and CRC are essential components. However, in this method, when the beacon window is followed by the broadcast window, the offset slot can be omitted, and other parameters are selected and used as needed.

Further, according to the above-mentioned method of Philips,
The broadcast information conveyed from inside the broadcast window may vary depending on the application used. In other words, location information may be transmitted through broadcasting information,
Notification information used in the OSI layer 2 and the layer 3 may be transmitted. If there is no broadcast information transmitted in this way, the broadcast window can be omitted.

FIG. 4 is a flowchart showing a process of executing an embodiment of a method of activating a Bluetooth terminal in a park mode in a connectionless broadcast-based Bluetooth system according to the present invention. As shown in FIG. 4, when the temporarily suspended Bluetooth terminal receives a new NAP identifier, it determines that it has moved to a new NAP area and executes a synchronization process (S400). During the broadcast window, the NAP broadcasts information related to setting values for connectionless park mode, notification messages, NAP identifiers, setting values for activation channels, and so on.

At the beginning of the activation channel, the Bluetooth terminal sets its frequency hopping pattern to NA.
Wait until the LMP message arrives in synchronization with P's frequency hopping pattern. When there is no traffic to be transferred to the moved Bluetooth terminal (S41)
In 0), the NAP informs the moved Bluetooth terminal that it supports random access.
The message is transferred (S420).

After the end of the beacon slot, the NAP activates the polling access window and the random access window (S430). The Bluetooth terminal receiving the LMP message, when there is traffic to update or transfer the location information, through the random access window using the EID packet,
The connection request is transferred to the NAP (S440).

At this time, the Bluetooth terminal waits for an arbitrary time (for example, RAND × halfslot) and then transfers the EID packet. Further, the NAP which has received the EID from the Bluetooth terminal transmits an activation message (S450). Then, the Bluetooth terminal that has received the activation message proceeds to the activation mode and becomes the activated component of the new NAP (S46).
0).

When the NAP calls the Bluetooth terminal (S410), the NAP transfers the activation message from the beacon slot to the Bluetooth terminal (S470). Upon receiving this activation message, the Bluetooth terminal proceeds to the activation mode (S46).
0).

After the Bluetooth terminal goes into the active mode, the first packet received by the Bluetooth terminal from the NAP is a poll message, and the Bluetooth terminal must respond to such a poll message (S480). . The response to Paul is NA
Upon reaching P, the NAP will connect with the Bluetooth terminal and BNE.
Data can be transferred by setting P-link (S4
90).

FIG. 5 shows that the moved Bluetooth terminal is
It is a figure which shows the flow of the process synchronized with a new NAP. Through the initial connection setting process, the Bluetooth terminal has N
It is connected to the AP slave. If there is no subsequent traffic, the Bluetooth terminal will be in the park mode. NAP is EID during beacon window
Broadcasts packets and sends an inquiry scan-st
The Bluetooth terminal in “ate” receives the EID packet transferred from the NAP.

The NAP behaves like an inquiry sub-state in the beacon window and operates in the same manner as the inquiry procedure, with the EID packet train.
Use A and B. The Bluetooth terminal in the inquiry scan mode determines that the beacon window has started if an EID packet is received after listening to one hopping frequency (S500). The Bluetooth terminal receiving the EID packet receives the EI
The BD_ADDR and the clock information included in the D packet are used to synchronize with the NAP (S510).

Also, this Bluetooth terminal uses the start point and size information of the broadcast window to
The start point of the broadcast window and its size are grasped, and the process waits until the start of the broadcast window (S520). If a general ID packet is received instead of an EID, the Bluetooth terminal recognizes that it is a general inquiry procedure and executes a response based on this recognition.

In the beacon window, EI
When the NAP and the Bluetooth terminal are synchronized by the D packet, the two devices of these NAP and the Bluetooth terminal operate as a master and a slave in one piconet (S530). ). In this way, the two devices that have the same synchronization can also use the ACL data packet to transmit the broadcast information, because the frequency hopping patterns also match.

In this case, one packet is transmitted a plurality of times,
In some cases, the Bluetooth terminal receives the fragmented ACL data packet and reconstructs it. Furthermore, the Bluetooth terminal can discard broadcast information that the Bluetooth terminal cannot understand. Then, the Bluetooth terminal transmits the L2C transferred from the NAP through the broadcast window.
The AP ACL data packet is received (S540).
Based on the L2CAP ACL data packet received in this way, the Bluetooth terminal may
You can grasp the information of.

NAs that contribute to the broadcast channel
P and the Bluetooth terminal respectively return to their original state when the broadcast window ends. Such a broadcast channel can also support SCO services if configured to process inquiry slots and broadcast data slots using SCO reverse slots.

Further, such a Bluetooth terminal is
Since it is not necessary to separately execute the procedure to set up the consolidation,
Bluetooth terminal is in sniff mode (sniff mo
de), a hold mode, a park mode, and an active mode (a).
In any of the active modes, if the DIAC supporting the broadcast channel is received, the broadcast information can be received in synchronization with the corresponding NAP. By using such characteristics, one Bluetooth terminal can receive information from a plurality of NAPs, and the handover procedure can be performed quickly using the received information.

Table 2 below summarizes the process of executing the activation method of the wireless communication device in the park mode.
Is the street.

[0061]

[Table 2]

As shown in Table 2, synchronization between the NAP and the Bluetooth terminal is performed through the broadcast channel in one stage. The Bluetooth terminal synchronized with the NAP is a 2-1 stage led by the NAP, or a 2-2 led by the Bluetooth terminal.
It is activated through steps. Then, the activated Bluetooth terminal goes through a three-step
As a component of the network managed by P, it becomes possible to send and receive data.

[0063]

According to the present invention, a wireless communication module based on a connectionless broadcast capable of activating a device in a park mode, and a method of activating a wireless communication device in a park mode include a Bluetooth terminal and It is possible to reduce the time required to set up the connection with the NAP and simultaneously activate one or more Bluetooth terminals.

Further, according to the present invention, the Bluetooth terminal in the park mode, which was present in an arbitrary piconet, is
When going to another piconet, the calling process is not executed unless there is traffic to be transferred to the Bluetooth terminal, so that it is possible to reduce the traffic as a whole.

Further, according to the present invention, the Bluetooth terminal in the park mode transfers the request message through the random access window only when the ACL data packet is transferred, so that the time and traffic can be reduced. You will get it.

The present invention has been described in detail with reference to the preferred embodiment of the present invention. However, a person having ordinary knowledge in the technical field to which the present invention pertains can make the present invention based on the above-described embodiment. It is understood that various modifications can be made without departing from the technical scope of the invention. Therefore, the technical scope included in the present invention is not limited only to the embodiments described above, and is defined by the scope of the claims of the present invention, and the equivalent of the scope of the claims. Should be done.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a Bluetooth module based on a connectionless broadcast capable of activating a device in a park mode according to the present invention.

FIG. 2 is a diagram showing a structure of a connectionless type activation channel.

FIG. 3 is a diagram showing a hierarchical structure of a broadcast channel and time information.

FIG. 4 is a flowchart showing a process of executing an embodiment of a method for activating a Bluetooth terminal in a park mode in a connectionless broadcast-based Bluetooth system according to the present invention.

[Fig. 5] The moved Bluetooth terminal becomes a new NAP
It is a figure which shows the flow of the process synchronized with.

Claims (27)

[Claims] 1. The size of the random access window,
And a variable setting unit for setting a window variable including the number of iterations, an information generating unit for generating window support information on whether to support a random access window, a polling access window and the above-mentioned generated based on the window variable. A wireless communication module comprising: a window management unit that activates and deactivates a random access window. 2. The wireless communication module according to claim 1, wherein the window support information is transferred through a beacon slot. 3. The wireless communication module according to claim 2, wherein the polling access window and the random access window are activated after the end of the beacon slot in which the window assistance information is transferred. 4. The wireless communication module according to claim 1, wherein the activation information is implemented by a link management protocol. 5. The wireless communication module according to claim 1, wherein the polling access window and the random access window are activated at the same time. 6. The radio according to claim 1, wherein the window variable further includes a predetermined time interval, and the polling access window and the random access window are sequentially activated according to the time interval. Communication module. 7. The wireless communication module according to claim 1, wherein the random access window is composed of a plurality of slots, and the slots support a synchronous connection type link. 8. The system further comprises an activation unit that transfers an activation message to the external communication device when a connection request message transferred from the external communication device is received in response to the window support information. The wireless communication module according to claim 1, wherein: 9. The wireless communication module according to claim 8, wherein the connection request message includes a Bluetooth terminal address of the external communication device. 10. The connection request message according to claim 8, wherein the connection request message is received after the number of time slots selected from 0 to the size of the random access window × 2 has elapsed. Wireless communication module. 11. The activating unit forwards the activation message including the Bluetooth terminal address of the external communication device when there is a packet to be transferred to the external communication device. The wireless communication module described in. 12. The activation message is transferred through a beacon slot.
The wireless communication module described in. 13. A synchronization information transfer unit for broadcasting synchronization information including a Bluetooth terminal address and clock information, and a packet for transmitting a broadcast data packet including a channel connection code, a packet header and a payload after transferring the synchronization information. The transfer unit may be further included, and the window management unit activates the polling access window and the random access window after transferring the synchronization information and the broadcast data packet. Wireless communication module. 14. The wireless communication module according to claim 13, wherein the synchronization information and the broadcast data packet are transferred through a beacon window and a broadcast window, respectively. 15. Transferring window support information on whether to support a random access window, activating the random access window generated based on a polling access window and a predetermined window variable, A method of activating a wireless communication device in a park mode, comprising: receiving a connection request from an external communication device through a random access window; and transferring an activation message to the external communication device. 16. The window assistance information is transferred through a beacon slot.
5. The method for activating a wireless communication device in park mode according to 5. 17. The wireless communication in the park mode according to claim 15, wherein the polling access window and the random access window are activated after the end of the beacon slot in which the window assistance information is transferred. Device activation method. 18. The method of activating a wireless communication device in a park mode according to claim 15, wherein the activation information is implemented by a link management protocol. 19. The method of activating a wireless communication device in a park mode according to claim 15, wherein the polling access window and the random access window are activated at the same time. 20. The window variable of claim 15, further comprising a predetermined time interval, and the polling access window and the random access window are sequentially activated according to the time interval. A method for activating a wireless communication device in a park mode. 21. The method of activating a wireless communication device in a park mode according to claim 15, wherein the polling access window includes a plurality of slots, and the slots support a synchronous connection type link. 22. The method of activating a wireless communication device in a park mode according to claim 15, wherein the connection request message includes a Bluetooth terminal address of the external communication device. 23. The connection request message according to claim 22, wherein the connection request message is received after a number of time slots selected from 0 to the size of the random access window × 2 have elapsed. Method for activating wireless communication device in park mode. 24. The method further comprising: transferring the activation message including a Bluetooth terminal address of the external communication device through a beacon slot when there is a packet to be transferred to the external communication device. The method for activating a wireless communication device in the park mode according to claim 15. 25. The method of activating a wireless communication device in a park mode according to claim 15, further comprising the step of synchronizing the external communication device before the window support information transfer step. . 26. The synchronizing step broadcasts synchronization information including a Bluetooth terminal address and clock information, and after transmitting the synchronization information, a broadcast data packet including a channel connection code, a packet header and a payload. 26. The method of activating a wireless communication device in park mode according to claim 25, further comprising: transferring. 27. The method of activating a wireless communication device in park mode according to claim 26, wherein the synchronization information and the broadcast data packet are transferred through a beacon window and a broadcast window, respectively.