JP2003110571A - Wireless transmitting method for selectively carrying out time hopping, wireless transmitting device, control station device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless transmitting method by which coexistence of a wireless transmission system with another system is enabled by carrying out time hopping as needed. SOLUTION: On a wireless network for carrying out information transmission control by using a transmission frame of the prescribed time making a partial band a reservation transmission band 35 and a time hopping area 36 to transmit information by time hopping processing, this network selectively uses any one of or both the reservation transmission band 35 and the time hopping area 36 corresponding to a style utilizing the network such as a fixed or movable style or level of a transmission rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless transmission method, a wireless transmission device, a control station device and a program for selectively executing time hopping.

[0002]

2. Description of the Related Art [1. Time Hopping Technology] As a conventional wireless transmission method, a time hopping technology is used in which information to be transmitted is subdivided at a predetermined time and is mapped in a random sequence on a time axis according to a predetermined algorithm. Thus, a method of obtaining communication that is less likely to be interfered with by another system has been devised.

In this time hopping technique, a method is generally used in which an algorithm for time hopping is exchanged in advance for communication between a transmission source device and a reception destination device before transmitting information.

[2. Personal Area Network] In recent years, Bluetooth has been commercialized as Bluetooth as a method for wirelessly transmitting products around the person, and these wireless connection methods are collectively called personal area networks. But,
It has already been put to practical use.

Recently, wireless transmission of moving image information has been considered as a powerful application in personal area networks.

More recently, an Ultra Wide Band wireless communication system using a short impulse signal of about 100 picoseconds has been devised as a wireless transmission method applied to a personal area network. The ultra wide band communication (ultra wide band transmission method) basically performs base band transmission using a signal composed of a pulse train having an extremely fine pulse width (for example, 1 ns (nanosecond) or less). In addition, the occupied bandwidth is the center frequency of the occupied bandwidth.
Bandwidth of GHz order such that the value divided by (for example, 1 GHz to 10 GHz) becomes almost 1, and the desired W-CDMA
Method, cdma2000 method, and SS (Spread Spec)
trum) and OFDM (Orthogonal Frequency Division Mult)
The bandwidth is extremely wide compared to the bandwidth used in a wireless LAN using iplexing).

The ultra wide band transmission system is
Due to its low signal power density characteristic, it has a feature that it hardly interferes with other wireless systems, and is expected as a technology capable of overlaying on the frequency band used by existing wireless systems. Because of the wider bandwidth, the personal area network (Personal Area
It is regarded as a promising ultra-high-speed wireless transmission technology of 100 Mbps level for Network (PAN) applications. The communication using the ultra wide band technology has a feature that a transmission capacity of a transmission line can be large because a signal is spread over a very wide band.

[3. Transmission by Packetization] Further, in information transmission, a method is generally used in which information to be wirelessly transmitted is fragmented to a predetermined size and packetized and transmitted.

[0009]

[Problems to be Solved by the Invention] [1. Problems of time hopping technology] When the time hopping technology is applied as a communication method, the effect cannot be exhibited unless the information capacity that can be transmitted through the transmission path is sufficiently secured compared to the actual amount of information transmitted. . Therefore, assuming that the wireless transmission path is used, the conventional general wireless transmission limits the transmission speed at a predetermined frequency bandwidth, which is not a very practical method.

Further, in the conventional hopping control, there is a problem that information transmission cannot be performed unless the hopping sequence is shared between the information transmission source and the information reception destination. There is a problem in that information must be exchanged with the hopping sequence and the timing for synchronizing, and the synchronization must be maintained even while receiving the information.

[2. Problems in personal area network when transmitting large amount of information] When transmitting large amount of information such as high-definition moving image information in real time in a wireless network such as a personal area network, A certain huge transmission band is required, and satisfactory information transmission cannot be performed unless most frequency resources of the transmission capacity are used. When wirelessly transmitting moving image information, the amount of information is enormous, so there is a demand for the introduction of wireless communication systems that have ample transmission capacity, and the frequency band used for transmission is in an increasingly high frequency range. Must.

However, in reality, when watching a high-definition television (HDTV) at home, such a high transmission rate of information is transmitted, while a portable headphone stereo device and a portable video are transmitted. Information transmission at a low transmission rate was used for the viewing device (Video Walkman).

[0013] These portable devices that use information transmission at a low transmission rate are often carried along with an individual and carried outdoors, and when devising wireless transmission between these devices, the device of another person is used. There was a problem that we had to consider interference and interference with.

Ultra wide band communication is a wireless communication system which has abundant transmission capacity for utilizing a very high frequency region on the order of gigahertz (GHz).
Although expected as a wireless transmission method that can be used in personal area networks, there is a problem in that multiple frequency channels cannot be placed, and it is difficult to coexist with multiple ultra wideband systems in the same space. It was

That is, when carrying a device forming a network by performing ultra wide band communication,
There is a problem of having to consider interference from other ultra wideband communication devices, and vice versa. There was a problem.

[Purpose of the Invention] The present invention has been made to solve the above problems, and specifically has the following objects.

When a personal area network is constructed and wireless transmission is performed using an ultra wide band communication system, wireless transmission that can coexist with other systems by performing time hopping as necessary Provide a way.

When high-rate information transmission is performed, a fixed area of the wireless transmission path is periodically reserved and used,
A method for selectively operating a wireless transmission method is provided by performing a time hopping operation when transmitting information at a low rate.

For fixedly used communication, a fixed area of a transmission path is periodically reserved and used, and for communication used while moving, a time hopping operation is performed. A method for selectively applying a transmission method is provided.

For communication used indoors, a fixed area of the transmission path is periodically reserved and used, and for communication used outdoors, a time hopping operation is performed. A method of selectively applying is provided.

A band allocation method is provided in which, when band reserved transmission is performed, a band reserved and transmitted in another wireless network having the same transmission frame period is set as an unused region and band allocation is not performed in the region. .

The source transmission device fragments the information into a predetermined size to form a packet, and the packet is subjected to random time hopping processing for transmission, and the destination transmission device sequentially receives the packets. Then
Provided is a wireless transmission method of randomly collecting information transmitted by time hopping and restoring the original information.

[0023]

As means for solving the above problems, the present invention has the following features.

According to a first aspect of the present invention, in a wireless transmission method using a wireless network composed of a plurality of wireless transmission devices, a step of checking an attribute of information to be wirelessly transmitted, and based on the attribute of the information, Selecting whether to wirelessly transmit the information by time hopping or to transmit the information by a bandwidth reservation method. The “information attribute” is, for example, a characteristic or characteristic that can determine whether or not the information is suitable for information transmission by time hopping, and as an example, information indicating whether or not the information is stream transmission, Alternatively, the amount of information transmitted can be an “information attribute”.

The present invention is, for example, a personal area
The present invention provides a wireless transmission method capable of coexisting with other systems by performing time hopping as needed when wireless transmission is performed using a ultra wide band communication system in a network.

When the ultra wide band technology is applied as a communication method for a personal area network, low rate communication is performed by time-hopping wireless communication, and high rate communication is performed normally. Use wireless communication without time hopping.

Further, according to the present invention, when the ultra wideband technology is applied as a communication method for a personal area network, the communication used outdoors is subjected to time hopping wireless communication and is used indoors. The wireless communication that does not perform the normal time hopping process may be applied to the fixedly used communication.

Furthermore, according to the present invention, when the ultra wide band technology is applied as a communication method for a personal area network, wireless communication with time hopping processing is performed for moving communication, and the mobile communication is almost fixed. The communication used may be configured to apply the wireless communication that does not perform the normal time hopping process.

Here, in the case of performing time hopping, the information to be transmitted is fragmented into a predetermined size and packetized, header information in which information such as the destination is described is added to each packet, and then a random transmission sequence is used. The packet may be transmitted, and the receiving side may collect the packets individually and reassemble the original information.

According to a fifth aspect of the present invention, in a wireless transmission method for a wireless network using a plurality of wireless transmission devices, if the wireless transmission device satisfies the first condition, information to be transmitted is predetermined. It is characterized in that it is packetized with a fragment size of, and is transmitted by time hopping, and when the wireless transmission device satisfies the second condition, the information to be transmitted is transmitted by band reservation transmission.

According to the invention described in claim 8, buffer means for storing information to be transmitted, means for receiving information to be transmitted from the buffer means, and means for transmitting the information to be transmitted by time hopping, if necessary, The attribute of the information to be transmitted, which is stored in the buffer means, is identified, and it is determined whether the time hopping operation is performed according to the information to be transmitted. Means for instructing to transmit by hopping.

According to a ninth aspect of the present invention, means for receiving the information transmitted by radio and information received from the receiving means are transmitted by time hopping from the received information without using the hopping pattern information. Means for identifying the packet, means for collecting the packets identified by the identifying means, buffer means for storing the relevant information after the packet collection, and information for storing the information stored in the buffer means at the arbitrary timing And a means for outputting.

In a tenth aspect of the present invention, when the bandwidth reservation request is received in the control station device of the wireless network, it is judged whether the bandwidth reservation is possible for the transmission, and the reservation is possible. For example, it is characterized in that a band reserved transmission area is set in accordance with the band reservation request, and when the reservation is impossible, the transmission by time hopping is instructed.

According to an eleventh aspect of the present invention, in a program for causing a computing device to function as a control unit of a wireless transmission device, a step of checking an attribute of information to be wirelessly transmitted stored in a buffer, and an attribute of the information. On the basis of,
And a step of selecting whether to wirelessly transmit the information by time hopping or to transmit the information by a band reservation method, which is a program for causing an arithmetic unit to execute.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Personal Area Network to which This Embodiment is Applied] FIG. 1 shows a personal area network to which a wireless transmission system according to this embodiment is applied.
It is a figure for demonstrating a network.

In the figure, there are a first network 101 and a second network 102. The first network 101 includes a transmission device 1-1, a transmission device 1-2, and a transmission device 1-3, and a second network 102 includes a transmission device 2-1, a transmission device 2-2, and a transmission device 2-3. Consists of. Each transmission device is a device having a wireless transmission function for wirelessly transmitting information and a wireless reception function for receiving information wirelessly transmitted and restoring the information.

Here, each network has a service area within a radius of approximately 10 m. When one network is out of the radio wave reachable range of each transmission device of the other network, the first and second networks 101 and 102 can perform communication using the same frequency band.

Further, the respective networks 101, 1
In 02, any one of the transmission devices configuring the network can function as a control station, and the transmission device functioning as a control station manages resources of the corresponding network (for example, management of reservation of transmission band) Do.

Next, the interference of the adjacent network with other networks will be described. FIG. 2 is a conceptual diagram for explaining a case where information transmission in the first and second networks shown in FIG. 1 interferes with other information transmission.

In the figure, the first network 101 and the second network 102 use exactly the same frequency region and are close to each other. First network 10
1, the first information transmission 21 is performed from the transmission device 1-1 to the transmission device 1-2. On the other hand, in the second network 102, the second information transmission 22 is performed from the transmission device 2-1 to the transmission device 2-2.

Here, the radio signal by the first information transmission 21 is received by the transmission device 2-2 of the second network 102 as the interference wave 23, and the radio signal by the second information transmission 22 is received as the interference wave 24. It is received by the transmission device 1-2 of the first network.

The problem of interference from other adjacent networks is easy in a personal area network to which ultra wide band communication is applied, which is characterized by performing spread processing in a very wide frequency band to perform wireless communication. Occurs in.

[Configuration Example of Radio Transmission Frame Used in this Embodiment] Next, a configuration example of a frame used in the wireless network according to this embodiment will be described. FIG. 3 shows a configuration example of a frame used for information transmission in the networks shown in FIGS. 1 and 2.

In this frame configuration example, the transmission frame cycle 31 is defined every predetermined time. One frame consists of a beacon broadcast area 32 and an information transmission area 33.
And a request area 34.

The beacon broadcast area 34 at the beginning of this frame is an area for broadcasting information common to the network (notification of allocation of bandwidth reserved transmission) from the control station of the network to a transmission device in the network. is there.

The information transmission area 33 has a bandwidth reservation transmission area 35 for performing bandwidth reservation transmission between transmission devices, a time hopping area 36, and other networks to preferentially perform information transmission as necessary. In addition, it includes an unused area 37 which is not used for information transmission in its own network (for waiting information transmission).

The lengths of the band reserved transmission area 35, the time hopping area 36, and the unused area 37 are variable and may not be provided in the frame if not necessary. For example, when the other band reserved transmission is not performed and the information transmission of the other network does not exist, the entire information transmission area 33 can be used as the time hopping area 36.

Request area 3 located at the end of the frame
Reference numeral 7 is an area for a transmission device (terminal) belonging to the network to reserve a transmission band to, for example, a control station. The request made in the request area 37 is notified to the transmission device in the network as a beacon signal in the beacon broadcast area 32 of the next frame, if necessary. [Example of Conventional Wireless Transmission Method] FIG. 4 is a diagram for explaining a case where information transmission is performed by the conventional wireless transmission method without time hopping in the first network and the second network shown in FIG. It is a figure for comparison with the present embodiment. FIG. 4A shows transmission information 41 from the transmission device 1-1 to the transmission device 1-2,
FIG. 4 is a diagram showing transmission information 42 from the transmission device 2-1 to the transmission device 2-2, and FIG. 4B is a diagram showing a state in which the transmission information 41 is included in a frame in the first network. 4C is a diagram showing a state in which the transmission information 42 is included in a certain frame in the second network, and FIG. 4D is the reception information received by the transmission device 1-2. 45 is a diagram showing 45 and reception information 46 received by the transmission device 2-2. FIG.

First, the transmission information 41 from the transmission device 1-1.
However, it is transmitted as the band reservation transmission 43 of the first network (FIG. 4 (B)). On the other hand, the transmission device 2-
The transmission information 42 from 1 is transmitted as the band reservation transmission 44 of the second network (FIG. 4).
(C)).

The band reserved transmission 43 (= transmission information 41) and the band reserved transmission 44 (= transmission information 42) are transmitted at timings where they partially overlap with each other in terms of time, and are transmitted between the first network and the second network. Since they are arranged close to each other as shown in FIG. 2, in these two band reserved transmissions, there are consecutive collision sections.

In this case, the second half of the reception information 45 of the transmission device 1-2 overlaps with the transmission information of the transmission device 2-1. Similarly, the reception signal 46 of the transmission device 2-2 is the same as the reception signal 46 of the transmission device 1-2. If it overlaps with the transmission information of -1, a so-called collision occurs, and there is a possibility that the information cannot be properly restored on the receiving side.

[Example of Reduction of Collision by Time Hopping] Next, according to the information transmission system of the present embodiment,
A method of reducing the collision will be described.

FIG. 5 shows that under the conditions described in FIG.
This is a case where time hopping is performed.
FIG. 5A is a diagram showing transmission information 51 from the transmission device 1-1 to the transmission device 1-2 and transmission information 52 from the transmission device 2-1 to the transmission device 2-2. FIG. 5B is a diagram showing that the transmission information 51 is divided into a plurality of small data (packets) 52, and the transmission information 53 is divided into a plurality of small data (packets) 54, respectively.
5 is a diagram showing a state in which the small data (packet) 52 is distributed and transmitted in the time hopping area 36 of a certain frame in the first network, and FIG.
FIG. 5D is a diagram showing a state in which a plurality of small data 54 are distributed and transmitted to the time hopping area 36 of a frame in the second network, and FIG.
FIG. 6 is a diagram showing reception information 57 in the transmission device 1-2 which is the reception side device and reception information 58 in the transmission device 2-2 which is the reception side device.

Here, the transmission information 5 from the transmission device 1-1
1 is subdivided into transmission information packets 52, and is further transmitted at random transmission timing as time hopping information transmission 55 of the first network (FIG. 5 (C)). On the other hand, the transmission information 53 from the transmission device 2-1 is subdivided into packets 54 of transmission information, and the time hopping information transmission 5 of the second network is further performed.
6 is being transmitted (FIG. 5 (D)).

As in the case of FIG. 4, the first network and the second network are arranged close to each other so as to be included in the reach of the information signal in the other wireless network, as shown in FIG. Therefore, the transmission device 1
In the reception information 57 in -2, a part of the packets overlaps with a part of the packets of the transmission device 2-1. Overlap with some packets. However, since these received information only partially overlap with each other, there is a sufficient possibility that appropriate information can be restored by error correction or the like.

[Example of Collision Due to Time Hopping at High Transmission Rate] Next, an example of collision due to time hopping at a high transmission rate will be described.

FIG. 6 shows the first network 1 shown in FIG.
11 is a diagram for explaining an example of a case where information transmission at a high transmission rate is performed using time hopping in 01 and the second network 102. FIG. FIG. 6A shows transmission information 61 from the transmission device 1-1 to the transmission device 1-2,
FIG. 6B is a diagram showing a state in which the transmission information 61 is divided into a plurality of packets 62, and FIG. 6C shows the transmission information 62 from the transmission device 2-1 to the transmission device 2-2. 6D is a diagram showing that the transmission information 63 is divided into a plurality of packets 64, and FIG.
FIG. 6E is a diagram showing a state in which the packet 62 is distributed and transmitted in a frame in the first network, and FIG. 6F is a diagram showing a plurality of packets 64 in a frame in the second network. FIG. 6G is a diagram showing a state in which data is dispersed and transmitted, and FIG. 6G illustrates reception information 67 in the transmission device 1-2 that is the reception side device and reception in the transmission device 2-2 that is the reception side device. It is a figure which shows the information 68.

First, the transmission device 1-1 subdivides the transmission information 61 into a plurality of packets 62 (FIG. 6 (B)). The transmission device 1-1 transmits the packet 62 as time hopping information transmission 65 of the first network at random transmission timing within the frame (FIG. 6 (E)).
On the other hand, the transmission device 2-1 subdivides the transmission information 63 into a plurality of packets 64 (FIG. 6 (D)). Transmission device 2-1
Transmits the packet 64 as time hopping information transmission 66 of the second network at random transmission timing in the frame (FIG. 6 (F)).

In this case, since the information is transmitted at the high transmission rate, the packet 6 is transmitted in each frame.
The ratio occupied by 2, 64 (time hopping information transmission 65, 66) is higher than that in the example shown in FIG. As a result, the rate at which one packet collides with the other packet becomes higher than in the case of FIG.

As a result, the reception information 67 in the transmission device 1-2 overlaps with a large number of packets sent from the transmission device 2-1. Similarly, the reception information 68 in the transmission device 2-2 is Since a large number of packets transmitted from the transmission device 1-1 overlap, the information contained in these overlapped packets cannot be properly restored in the transmission device on the receiving side, and as a result correct reception information 67, It becomes difficult to acquire the reception information 68.

As described above, it is assumed that the effect cannot be obtained when the time hopping operation is performed in the information transmission that occupies the transmission path for a long time.

[Transmission control method for coordinating networks] In the wireless transmission method according to the present embodiment, as described above, even in information transmission at a high transmission rate in which information collision cannot be avoided by the time hopping method, We propose a transmission control method that can avoid information collision.

In this transmission control method, when band reserved transmission is performed, the unused area is set by setting an area corresponding in time to a band reserved transmission area in another wireless network. Does not allocate bandwidth in the area.

FIG. 7 is a diagram for explaining the transmission control method. FIG. 7A is a diagram showing transmission information 41 from the transmission device 1-1 to the transmission device 1-2 and transmission information 42 from the transmission device 2-1 to the transmission device 2-2.
FIG. 7B is a diagram showing a state in which a band reserved transmission area 73 and an unused area 74 are set in a frame in the first network, and FIG. FIG. 7 is a diagram showing a state in which a use area 75 and an area 76 for information transmission are set, and FIG. 7D shows reception information 77 received by the transmission device 1-2.
9 is a diagram showing reception information 78 received by the transmission device 2-2. FIG.

In the first network, when the control station broadcasts by the beacon that the bandwidth reserved transmission of the transmission device 1-1 is reserved, the transmission device 1-1 sends the transmission information 71 to the first information. It is transmitted in the band reserved transmission area 73 of the network (FIG. 7 (B)). On the other hand, the control station of the second network receives the beacon, detects the existence of the band reserved transmission area 73, and sets the area corresponding to the band reserved transmission area 73 to the unused area 75 (FIG. 7C). ). Therefore, the transmission device 2-1 waits for transmission until the area in which the transmission information 72 after the unused area 75 can be transmitted is reached.

In the second network, the control station uses the beacon after the end of the unused area 75 to transmit the transmission device 2-1.
When the band reservation transmission area 76 for is set to be broadcast, the transmission device 2-1 transmits the transmission information 72 in the band reservation transmission area 76 of the second network (FIG. 7C). . On the other hand, the control station of the first network receives the beacon, detects the existence of the bandwidth reserved transmission area 76, and sets the area corresponding to the bandwidth reserved transmission area 76 to the unused area 74 (FIG. 7 (B)). ). Therefore, the transmission device 1
-1 does not perform transmission in this unused area 75.

That is, in the first network, the portion where information is transmitted in the second network is set as an unused area and is not used for information transmission. Similarly, in the second network, the information is transmitted by the first network. The part that is being transmitted is set as an unused area and is not used for information transmission.

By this transmission control, the reception information 77 in the transmission device 1-2 and the reception signal 78 in the transmission device 2-2 can be correctly received without collision (FIG. 7 (D)).

[Configuration Example of Wireless Transmission Device] Next, a configuration example of the transmission device configuring the wireless network according to the present embodiment will be described. The transmission device has a wireless transmission unit for performing a transmission function and a wireless reception unit for performing a reception function.

[Configuration Example of Radio Transmission Unit] FIG. 8 is a diagram showing the configuration of the radio transmission unit of the transmission device according to the present embodiment.

The wireless transmission unit is the interface unit 81.
And the buffer unit 8 connected to the interface unit 81.
2 and the packetization processing unit 8 connected to the buffer unit 82.
3, a UWB wireless communication unit 84 connected to the buffer unit 82 and the packetization processing unit 83, and a UWB wireless communication unit 84.
Antenna unit 85 connected to the UWB wireless communication unit 8
4 is connected to the hopping control unit 87 for performing hopping control, the interface unit 81, the buffer unit 82, the UWB wireless communication unit 84, and the hopping control unit 87, and is connected to the control unit 86 for performing these controls. The information storage unit 88 is provided.

The transmission device according to this embodiment is an external device.
It has an interface section 81 for connecting to (not shown). A buffer 82 for storing wirelessly transmitted information (for example, image information, audio information, moving image information, streaming information, etc .; hereinafter referred to as “media information”) received from an external device is provided, and the media information is temporarily stored in the buffer unit 82. Stored

When the media information stored in the buffer 82 is wirelessly transmitted, the control unit 86 determines whether the time hopping process is necessary. For example, the control unit 86
Is the amount of information to be transmitted, the network usage status,
The necessity of the time hopping process may be determined based on the presence / absence of movement.

When the control unit 86 determines that the time hopping process is to be performed, the control unit 86 causes the packetization processing unit 83 to supply the information stored in the buffer 82. Upon receiving the information, the packetization processing unit 83 divides the information into information of a predetermined size, adds header information and the like to the information, and generates a packet. Packetization processing unit 83
Supplies the generated packet to the UWB wireless communication unit 84.

On the other hand, the controller 86 is a hopping controller 87.
If you issue a command to the time hopping operation to
The hopping control unit 87 executes a time hopping operation by sending a packet converted into a radio signal to the UWB wireless communication unit 84 based on a predetermined hopping sequence at a timing according to the hopping sequence.

[Example of Configuration of UWB Wireless Communication Unit] Here, U
A configuration example of the WB wireless communication unit 84 will be described with reference to FIGS. 9 and 10. FIG. 9 is a block diagram showing a configuration example of the UWB wireless communication unit 84. In addition, FIG.
FIG. 7 is a waveform chart of the B wireless communication unit 84.

The transmitter shown in FIG. 9 is a synthesizer 902.
Spreading code generator 903 that generates spreading code sequence SG902 at the frequency of, spreading code sequence SG902 and information signal S
Multiplier 904 that multiplies G901 and spreading code sequence SG
Pulse signal SG90 corresponding to 0/1 of spread signal SG903 obtained by multiplying 902 by information signal SG901
4 and a bandpass filter 906 that extracts a predetermined range of this pulse signal.

The spread code generator 903 is used by the synthesizer 9
The spread code sequence SG902 at the frequency of 02 is multiplied by the multiplier 904.
Output to. In the multiplier 904, the information signal SG901 is multiplied by the spread code sequence to form a spread signal, and this spread signal is output to the pulse generator 905.

The pulse generator 905 outputs 0/0 of the spread signal.
Corresponding to 1, a very fine pulse signal of 100 Mbps (referred to as "ultra wide band signal") is generated. This pulse signal is a bandpass filter 90.
6 is output to a predetermined range, for example, 3.0 to 5.0.
GHz is extracted. The output of the bandpass filter is supplied to the antenna unit 85 and radiated into the air.

Although the bi-phase modulation method using the phase change as the 0/1 information of the ultra wide band signal has been described as the modulation method, it is described in, for example, Japanese Patent Publication No. 10-508725. It is also possible to apply a so-called pulse position modulation method using a signal in which the timing of impulse generation is delicately shifted according to the 0/1 information of the spread signal.

The ultra wide band signal generated by the UWB wireless communication section 84 is radiated to the medium (in the air) via the antenna section 85.

Returning to FIG. 8 again, the description of the configuration example of the wireless transmission section will be continued.

In the wireless transmission unit, the control unit 86, if the time hopping processing is not performed, the buffer unit 8
The UWB wireless communication unit 84 is configured by directly adding header information or the like to the information stored in 2 to configure wireless transmission information.
Are sequentially supplied to the antenna 85 to form a periodic impulse signal 805 spread in an ultra wide band, and the signal is supplied to the antenna 85 for wireless transmission.

A series of operations of these wireless transmission units are configured to be controlled by the control unit 86. For example, in the case of performing band reservation transmission, when the time when the band reservation is reached, information is transmitted. Transmission is performed.

The control unit 86 is connected to the information storage unit 88. The information storage unit 88 stores information necessary for communication and transmission control such as the start time information of the band reserved transmission. The stored information is stored in the control unit 8 as necessary.
The information storage unit 88 is written and read under the control of 6.
Is supplied to the control unit 86. Actually, the control unit 86
May be constituted by a central processing unit (CPU),
The CPU is a storage device (not shown) (eg, EEPROM).
(Electrically Erasable Programmable Read-Only Mem
ory), etc.) performs a predetermined control operation according to a program stored in

[Configuration Example of Radio Reception Device] Next, a configuration example of the radio reception unit of the transmission device according to the present embodiment will be described with reference to FIG. FIG. 11 is a block diagram showing a configuration example of the wireless reception unit according to the present embodiment.

The radio receiving section includes an antenna section 111, a UWB radio communication section 112 connected to the antenna section 111,
Packet collection unit 1 connected to UWB wireless communication unit 112
13, the UWB wireless communication unit 112 and the packet collection unit 11
3 is connected to the buffer unit 114, and the buffer unit 114
Interface unit 115, UWB wireless communication unit 112, packet collection unit 113, and buffer unit 1
14 connected to the interface unit 115 and the information storage unit 117 connected to the control unit 116.
And have.

In the wireless communication section, the antenna section 111 receives the ultra wide band signal and supplies it to the UWB wireless communication section 112. The UWB wireless communication unit 112 is configured to restore a fragmented packet information signal or stream information signal using a desired ultra wideband signal 1101 and a pulse train generated by a predetermined despreading code. .

[Structural Example of Wireless Reception Unit] Here, a structural example of the UWB wireless communication unit 112 will be described with reference to FIGS. 12 and 13. FIG. 12 is a UW according to an embodiment of the present invention.
3 is a block diagram showing a configuration example of a B wireless communication unit 112. FIG.
FIG. 13 is a diagram showing signal waveforms in the UWB wireless communication unit shown in FIG.

As shown in FIG. 12, UWB radio communication section 112 generates spreading code sequence SG1202 at the frequency of antenna 1204 (same as antenna 111 of FIG. 11) for receiving ultra wide band signal SG1201 and synthesizer 1201. Spread code generator 1202, pulse generator 1203 for generating pulse signal SG1203 corresponding to 0/1 of spread code sequence SG1202, pulse signal SG1203 and ultra wide band signal SG1.
It has a multiplier 1206 that multiplies 201 and outputs a despread signal SG1204, and an integrator 1207 that integrates the despread signal SG1204 and outputs a decoded signal SG1205.

The ultra wideband signal SG1201 radiated by the transmission device on the transmission side is received by the antenna 1204. This received ultra wideband signal S
The G1201 is output to the multiplier 1206 after the unnecessary component is removed by the bandpass filter 1205.

The spreading code generator 1202 uses the frequency of the synthesizer 1201 to spread the spreading code sequence (the same spreading code sequence as the spreading code sequence used in the transmission device on the transmission side) SG1202.
Is output to the pulse generator 1203. Pulse generator 12
In 03, the pulse signal SG1203 is generated, and the spread code sequence output from the spread code generator 1202 is superimposed on the pulse and output to the multiplier 1206.

Therefore, in the multiplier 1206, the pulse signal SG1203 on which the spread code sequence SG1202 is superposed.
Is multiplied by the ultra wideband signal SG1201 received by the despreading signal SG1204 and the despreading signal SG1204 is despread.
Is generated.

The despread signal SG1204 is supplied to the integrator 120.
7 and integrated by the integrator 1207 to obtain the decoded signal S
It is output as G1205.

Returning to FIG. 11 again, the description of the configuration example of the wireless reception unit will be continued.

When receiving the packet subjected to the time hopping processing, the packet collection unit 113 temporarily collects the information of the fragmented packet information signal output from the UWB wireless communication unit 112. When a series of information is constructed, it is supplied to the buffer 114 as a desired information signal. On the other hand, when the wireless reception unit is performing the band reservation transmission reception process, the information received at the reception timing is supplied from the UWB wireless communication unit 112 to the buffer unit 114 as a stream information signal. That is, the buffer unit 114 has a function of temporarily storing information, and acts to absorb temporal fluctuations when transmitting real-time information.

The buffer section 114 is an external device (not shown).
The information stored in the buffer unit 114, which is connected to the interface 115 for connecting to, is stored in a predetermined interface format at a desired timing (for example, when the external device is in the information receivable state). Output to an external device (not shown).

A series of these receiving processes are performed based on an instruction from the control unit 116, and the control unit 116 is connected to an information storage unit 117 for storing parameters required for communication.

The information storage unit 117 stores information necessary for communication and transmission control. The stored information is written under the control of the control unit 116 as necessary,
It is read and supplied from the information storage unit 117 to the control unit 116. In practice, the control unit 116 is a central processing unit (C
It may be configured by a PU, and the CPU is a storage device (not shown) (for example, EEPROM (Electrically Era)
sable Programmable Read-Only Memory) etc.) performs a predetermined control operation according to a program stored therein.

[Configuration Example of Various Packets Used in Wireless Transmission System According to this Embodiment] Next, with reference to FIGS. 14 to 17 with respect to configuration examples of various packets used in the wireless transmission system according to this embodiment. It will be described with reference to FIG.

[Configuration Example of Beacon Information Notification Packet] First, a configuration example of the beacon information notification packet will be described. FIG. 14 is a diagram showing a configuration example of the beacon information notification packet. The beacon information notification packet is applied to the packet transmitted from the control station in the beacon broadcast area 32 shown in FIG. 3, for example.

In the illustrated configuration example, the unique network ID 141 for identifying the wireless network and the synchronization time information 14 of a frame period equivalent to a time stamp, for example, are used.
2, start position information 143 of the asynchronous transfer area, start position information 144 of the unused area, and start position information 145 of the reserved transfer area. The start position information 145 of the reserved transfer area is set according to the number of reserved transfers. There is a configuration in which multiple packets are arranged, and error detection code (CRC) 146 is added at the end of the packet
A configuration in which is added is conceivable.

[Configuration Example of Time-Hopping Packet] FIG. 15 shows a configuration example of a packet for time-hopping (hereinafter referred to as “time-hopping packet”). For example, packet 5 in FIG.
2, 54 may have such a structure.

In the illustrated configuration example, an identification code 151 for identifying a time hopping packet,
An information transmission source identifier (ID) 152 indicating an information transmission source, an information reception destination identifier 153 indicating an information reception destination, and fragment information 15 indicating fragment-related information of this packet.
4 and a data payload (fixed length) 155 as information content. Furthermore, the error detection code
(CRC) 156 may be added.

[Configuration Example of Packet for Stream Transmission]
Next, a configuration example of a packet for stream transmission (hereinafter, referred to as “stream packet”) will be described. Packets for stream transmission are, for example, the band reserved transmission area 73 in FIG. 7B and the band reserved transmission area 76 in FIG. 7C.
Applied to packets transmitted in.
FIG. 16 is a diagram showing a configuration example of a packet for stream transmission.

Here, an identification code 161 indicating a stream packet and a time stamp 162 for disclosing the content contained in this packet.
And a data payload 163 as information content, and an error detection code (CRC) 164 may be added to this.

[Example of Packet Configuration in Request Area] FIG. 1
FIG. 7 is a diagram showing a configuration example of a packet used in the request area 34 of FIG. 3 (hereinafter, referred to as “request packet”).

The request packet includes an identification code 171 for identifying the request packet, an information transmission source identifier 172 indicating an information transmission source, an information reception destination identifier 173 indicating an information reception destination, and this request packet. Of the request content 174 and the like, and an error detection code (CRC) 175 may be added thereto.

The contents of the packets shown in FIGS. 14 to 17 are shown only for the purpose of explaining the present embodiment, and in reality, other necessary information is appropriately included in the exchange. May be designed to be.

[Operation Example of Transmission Device as Information Transmission Source by Wireless Transmission Method According to this Embodiment] Next, an operation example of the transmission device as an information transmission source by the wireless transmission method according to this embodiment will be described. A description will be given with reference to 18.
FIG. 18 shows an operation flow of the transmission device which is the information transmission source according to the present embodiment.

First, the control unit 86 of the transmission device serving as the information transmission source determines whether or not an information transmission request is made from an external device (not shown) connected to the interface unit 81 (step 1). When the information transmission request is made, the control unit 86 confirms the attribute of the information to be transmitted (step 2). The “information attribute” is a characteristic or characteristic of information that is a criterion for determining whether or not the information should be transmitted by time hopping transmission. For example, it is transmitted by asynchronous communication or bandwidth reservation communication (isochronous). , Or burst transmission or stream transmission, or whether the amount of information to be transmitted is large or small. on the other hand,
If there is no information transmission request, the process proceeds to step 11 described later.

Next, the control unit 86 selects, based on the attribute of the information, whether to wirelessly transmit the information by time hopping or to transmit the information by the band reservation method (step 3). . When the controller 86 selects the bandwidth reservation method, the bandwidth reservation transmission request is transmitted to the control station of the network (step 4). On the other hand, when the time hopping transmission is selected, the control unit 86 causes the packetization processing unit 86 to supply the information and packetize the information into a predetermined fragment size (step 5). Next, the control unit 86 determines whether time hopping transmission is necessary (step 6). (Here,
It is also possible to adopt a configuration in which the effect of a burst error on the transmission path is reduced by performing time hopping processing as needed even in asynchronous transmission. ) In step 6, when the control unit 86 determines to perform time hopping transmission, the control unit 86 causes the hopping control unit 87 to generate a random sequence pattern (step 7), and the UWB wireless communication unit 84 causes the random sequence pattern to be generated. Then, the time hopping pattern is set so that the packet is transmitted in accordance with (step 8).

As an example of this hopping pattern, it is possible to set a hopping cycle which is an integral multiple of a predetermined packet size and apply the hopping pattern to the hopping cycle to perform time hopping transmission. That is, when the hopping cycle of 0 to 15 is set, a random integer hopping pattern of 0 to 15 is generated and the packet transmission timing is set randomly in time according to the sequence. When the time hopping setting (step 9) is completed, step 16 described later
Move to.

On the other hand, when the time hopping transmission is not performed in step 7, the control unit 86 makes a setting to immediately start the transmission (step 9), and the processing shifts to step 16 described later.

In step 10, the control unit 86 confirms the reception of the information transmitted by radio, and if it receives, confirms whether or not a beacon has been received (step 11).
When the beacon is received, the control unit 86 performs frame cycle synchronization processing according to the beacon (step 12), confirms whether the band reserved transmission area is designated (step 13), and designates the area. If so, the transmission area for reserved transmission is set (step 14).

It is judged whether or not the transmission timing designated in each of the above (step 8, step 9, step 14) has arrived (step 15). When the timing has arrived, the control unit 86 causes the UWB wireless communication unit to do so. 84
To perform information transmission processing. With that, the process is completed.

[Operation Example of Transmission Device as Information Receiving Destination in this Embodiment] Next, an operation example of the transmission device as an information receiving destination in this embodiment will be described with reference to FIG. FIG. 19 is a flowchart showing an operation example of the transmission device which is the information receiving destination according to the present embodiment.

The control unit 11 in the wireless transmission unit of the transmission device
6 confirms whether or not the information wirelessly transmitted via the UWB wireless communication unit 112 is received (step 3).
1). If received, the control unit 116 confirms whether a beacon has been received (step 32). When the beacon is received, the control unit 116 performs a frame cycle synchronization process (step 33) and further confirms whether the band reserved transmission area is designated by the beacon (step 34). If the designation is made, the reception area for reserved transmission is set (step 35).

Next, the control unit 116 determines whether the designated reception timing has arrived (step 3).
6) When the timing arrives, information reception processing is performed (step 37), and the information is buffered by the buffer unit 11.
4 is stored (step 38).

On the other hand, when it is determined that a signal other than the beacon is received in the determination processing (step 32) of whether or not the beacon is received, it is determined whether the received information is reception of hopping information. Do (Step 3
9). This can be done by reading whether the received information is a hopping packet. If the packet is a hopping packet, the control unit 116 controls the UWB wireless communication unit 1
12 and the packet collection unit 113 are controlled to collect hopping packets (step 40). This is judged by the packet identification added to each packet.

Next, the control section 116 judges whether or not the information collection is completed (step 41). When the control unit 116 determines that the information collection is completed (all the hopping packets have been received), the collected packets are stored in the buffer unit 114 from the packet collection unit 113 (step 42).

Whether or not all the packets are received is determined by referring to the fragment information of the hopping packet. In addition, when a part of the hopping packet cannot be received, a retransmission request for the hopping packet may be transmitted.

Next, the control unit 116 causes the buffer unit 114 to
It is determined whether or not data is stored in (step 43). If not stored, the process ends.

When the data is stored in the buffer section 114, the control section 116 determines whether or not the data transmission time to the external device connected to the interface section 115 has come (step 44). This is used when performing the stream transmission, and performing the control not to transmit the information to the device connected via the interface until the transmission time arrives by the time stamp information or the like.

When the information transmission time has come, the control unit 116 causes the buffer unit 114 to supply the information to the interface unit 115, and transmits the information to the connected external device (step 45).

With the above, the operation of the transmission device on the receiving side is completed.

[Operational Example of Transmission Device as Control Station] Next, an operational example of the transmission device as a control station of the wireless network according to the present embodiment will be described. Figure 20
FIG. 7 shows an operation flow of the transmission device which is the control station of the network according to this embodiment.

In the figure, the control unit 11 of the transmission device serving as a control station
6 confirms whether or not the wirelessly transmitted band reservation request is received (step 51), and if not received, moves the processing to step 54 described later.

On the other hand, when the bandwidth reservation request is received,
It is judged whether bandwidth reservation is possible for the transmission (whether resources for the transmission can be secured) (step 52). If the reservation is possible, the bandwidth reservation transmission according to the bandwidth reservation request is performed. The area is set (step 53). If the reservation is not possible, the bandwidth reservation transmission is not designated and the process proceeds to step 54. As a modified example, the configuration may be such that it is notified at this time or that reserved transmission is impossible.

Then, the control station confirms whether the beacon transmission time has come (step 54).

When the beacon transmission time arrives, the beacon information is broadcasted (step 55).

[Advantages of this Embodiment] By applying the time hopping technique to the communication having a bit rate much lower than the transmission capacity of the wireless transmission path, even in the environment where other wireless networks are operating. Thus, there is an effect that a method for favorably performing communication at a low bit rate can be obtained.

Further, there is an effect that it is possible to reduce the interference of other radio networks operating in the same environment in a burst manner.

Further, by applying the band reservation transmission to the communication of the bit rate having a high wireless transmission capacity, it is possible to obtain the method of easily performing the high speed information transmission. That is, time-hopping wireless transmission is used for wireless transmission of audio information, and bandwidth reservation transmission is performed for high-quality video information transmission, so that an optimal transmission method according to the amount of information transmitted. Can be obtained.

When the wireless network moves, by applying this time hopping technique, it is possible to obtain a method of favorably transmitting information even if there is another wireless network at the moving destination. .

Further, there is an effect that it is possible to reduce the influence of interference with other wireless networks operating under the same environment.

Furthermore, when the wireless network is used almost fixedly, the band reservation transmission is applied, so that the high-quality transmission path can be constantly provided. In other words, when moving and used, wireless transmission with time hopping processing is used, and when fixedly used, reserved bandwidth transmission is performed, so that optimal transmission according to each usage mode is performed. You can get the way.

When wireless transmission is performed outdoors or in a public place, by applying this time hopping technique, information can be transmitted well even in an environment in which an unspecified number of other wireless networks are operating. There is an effect that a method can be obtained.

Further, there is an effect that it is possible to reduce the influence of interfering interference with other wireless networks operating under the same environment.

Further, when it is used indoors, at home, in the office, etc., by applying band reservation transmission, it is possible to freely provide a private network.

That is, time-hopping wireless transmission is used for wireless transmission in a public environment such as outdoors or in public transportation, and bandwidth is used for wireless transmission in a private environment such as indoors or at home. By applying reserved transmission, it is possible to obtain the optimum transmission method in each usage environment.

When performing bandwidth reservation transmission, a radio transmission method that can coexist with other networks can be obtained by making reservations while avoiding bands used in other radio networks with the same transmission frame period. Therefore, there is an effect that a wireless network can be constructed by spatially overlapping.

Here, the information receiving source device adds the overhead information similar to the individual packet to the divided information for performing the time hopping process in the information transmitting source device, and the information receiving device receives the time hopping information. Even if the sequence is not known, the effect that the hopping-processed information can be easily received by receiving the packet from the information transmission source device.

By adding overhead information similar to individual packets to the information transmission source device and transmitting the same,
The information receiving device does not need to maintain strict synchronization with the transmission device of the transmission source due to time hopping, and has the effect of simplifying the circuit configuration.

[0145]

EFFECTS OF THE INVENTION Since information transmission by time hopping and band reservation transmission are appropriately selected for information transmission, appropriate information transmission in the wireless network is performed even when interference with other wireless networks may occur. You can

[Brief description of drawings]

FIG. 1 is a diagram for explaining a personal area network to which a wireless transmission system according to this embodiment is applied.

2 is a conceptual diagram for explaining a case where information transmission in the first and second networks shown in FIG. 1 interferes with other information transmission.

FIG. 3 is a diagram showing a configuration example of a wireless transmission frame in a network according to the present embodiment.

FIG. 4A is a diagram illustrating transmission devices 1-1 to 1;
-2 to the transmission information and the transmission device 2-1 to the transmission device 2-
2 is a diagram showing the transmission information to the No. 2 and FIG. 4 (B) is a diagram showing a state in which the transmission information is included in the frame.
FIG. 4C is a diagram showing that the frame includes transmission information, and FIG. 4D shows the reception information received by the transmission device 1-2 and the reception information received by the transmission device 2-2. FIG.

FIG. 5A is a diagram illustrating transmission devices 1-1 to 1;
-2 to the transmission information and the transmission device 2-1 to the transmission device 2-
5 is a diagram showing the transmission information to the No. 2 and FIG. 5 (B) is a diagram showing how the transmission information is divided into packets.
FIG. 5C is a diagram showing how packets are distributed and transmitted in a time hopping area of a frame in the first network, and FIG. 5D is a time hopping of a frame in the second network. FIG. 6E is a diagram showing a state in which a plurality of packets are distributed and transmitted in an area. FIG. 5E illustrates reception information in the transmission device 1-2 that is the reception side device and the transmission device 2 that is the reception side device. 2 is a diagram showing the reception information in FIG.

FIG. 6A is a diagram illustrating transmission devices 1-1 to 1;
6 is a diagram showing a state in which the transmission information is divided into a plurality of packets, and FIG. 6C shows a state in which the transmission information is transmitted from the transmission device 2-1 to the transmission device 2. 6 is a diagram showing the transmission information for -2, and FIG. 6D is a diagram showing a state in which the transmission information is divided into a plurality of packets.
FIG. 6E is a diagram showing how packets are distributed and transmitted in a certain frame in the first network, and FIG. 6F is a diagram in which a plurality of packets are distributed in a frame in the second network. FIG. 6 (G) shows reception information in the transmission device 1-2 which is the reception side device and reception information in the transmission device 2-2 which is the reception side device. It is a figure.

FIG. 7A shows a transmission device 1-1 to a transmission device 1.
-2 to the transmission information from the transmission device 2-1 to the transmission device 2-
FIG. 7 (B) is a diagram showing the transmission information to the second transmission line, and FIG.
7C is a diagram showing a state in which a band reserved transmission area and an unused area are set in the frame in the network of FIG. 7, and FIG. 7C is a diagram showing an unused area in the frame and an area for information transmission in the second network. FIG. 7D is a diagram showing reception information received by the transmission device 1-2 and reception information received by the transmission device 2-2.

FIG. 8 is a diagram showing a configuration of a wireless transmission unit of the transmission device according to the present embodiment.

FIG. 9 is a block diagram showing a configuration example of a UWB wireless communication unit.

10 is a waveform diagram in the UWB wireless communication unit shown in FIG.

FIG. 11 is a block diagram showing a configuration example of a wireless reception unit according to the present embodiment.

FIG. 12 is a block diagram showing a configuration example of a UWB wireless communication unit according to the embodiment of the present invention.

13 is a diagram showing signal waveforms in the UWB wireless communication unit shown in FIG.

FIG. 14 is a diagram showing a configuration example of a beacon information notification packet.

FIG. 15 is a diagram showing a configuration example of a packet when performing time hopping.

FIG. 16 is a diagram showing a configuration example of a packet for stream transmission.

FIG. 17 is a diagram showing a configuration example of a request packet.

FIG. 18 is a flowchart showing an operation of the transmission device which is an information transmission source according to the present embodiment.

FIG. 19 is a flowchart showing an operation example of a transmission device which is an information receiving destination according to the present embodiment.

FIG. 20 is a flowchart showing the operation of the transmission device which is the control station of the network according to the present embodiment.

[Explanation of symbols]

31 ... Transmission frame cycle 32… Beacon Broadcast Area 35 ... Band reserved transmission area 36… Time hopping area 37 ... unused area 81… Interface part 82 ... Buffer unit 83 ... Packetization processing unit 84 ... UWB wireless communication unit 85… Antenna part 86 ... Control unit 87 ... Hopping processing section 88 ... Information storage unit 111 ... Antenna section 112 ... UWB wireless communication unit 113 ... Packetization processing unit 114 ... Buffer unit 115 ... Interface part 116 ... Control unit 117 ... Information storage unit

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K033 AA09 CA11 CB01 CB13 CB15                       CC01 DA19 DB13 DB16 EA06                       EC01                 5K067 BB02 CC08 CC10 EE61 HH23                       JJ18 KK15

Claims (11)

[Claims] 1. A wireless transmission method using a wireless network composed of a plurality of wireless transmission devices, the step of checking the attribute of information to be wirelessly transmitted, and wirelessly transmitting the information by time hopping based on the attribute of the information. And a step of selecting whether to transmit the information or to transmit the information according to a bandwidth reservation method. 2. The wireless transmission method according to claim 1, wherein, when band reservation transmission is performed in another wireless network, a region other than a region in which band reservation transmission is performed in the other wireless network. Is assigned to the transmission band reservation. 3. The wireless transmission method according to claim 1, wherein the transmission device of the information transmission source adds predetermined overhead information to the packet and transmits the packet at random, and the transmission device of the information reception destination transmits the overhead information. A wireless transmission method characterized in that corresponding packets are individually collected based on the above. 4. The wireless transmission method according to claim 1, wherein when a transmission band corresponding to the transmission band reservation made in the step of making the transmission band reservation is not allocated, information to be transmitted is transmitted by time hopping. A wireless transmission method, further comprising: 5. A wireless transmission method for a wireless network using a plurality of wireless transmission devices, wherein when the wireless transmission device satisfies a first condition, information to be transmitted is packetized in a predetermined fragment size. Then, this is transmitted by time hopping, and when the wireless transmission device satisfies the second condition, the information to be transmitted is transmitted by band reservation transmission. 6. The wireless transmission method according to claim 5, wherein the first condition is that the wireless transmission device is being used movably, and the second condition is that the wireless transmission device is fixed. The wireless transmission method is characterized by being used in. 7. The wireless transmission method according to claim 5, wherein the first condition is that the wireless transmission device is used in an open space, and the second condition is that the wireless transmission device is closed. A wireless transmission method characterized in that it is used in a space. 8. A buffer means for storing information to be transmitted and an attribute of the information to be transmitted stored in the buffer means are identified, and it is determined whether to perform a time hopping operation according to the attribute of the information to be transmitted. When it is determined to perform, the means for instructing the transmitting means to transmit the information to be transmitted by time hopping, the information to be transmitted from the buffer means, And a means for transmitting information to be transmitted by time hopping. 9. A means for receiving information wirelessly transmitted, a means for receiving the information received from the receiving means, and identifying a packet transmitted by time hopping from the received information without using hopping pattern information. A means for collecting the packet identified by the identifying means, a buffer means for storing the relevant information after the packet collection, and a means for outputting the information stored in the buffer means at the arbitrary timing A wireless transmission device. 10. A control station device of a wireless network, when receiving a bandwidth reservation request, judges whether bandwidth reservation is possible for the transmission, and if reservation is possible, responds to the bandwidth reservation request. A control station device of a wireless network, characterized by setting a band reserved transmission area and instructing transmission by time hopping when reservation is impossible. 11. A program for causing a computing device to function as a control unit of a wireless transmission device, the step of checking an attribute of information to be wirelessly transmitted stored in a buffer, and time hopping based on the attribute of the information. And a step of selecting whether to wirelessly transmit the information or to transmit the information by a bandwidth reservation method.