JP2002135273A - Method and equipment for radio transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and equipment for radio transmission by which information transmission can be performed efficiently according to the kind of the information transmission. SOLUTION: In this method for radio transmission, information on the destination of the information transmission is identified from a transmitted asynchronous transmission packet, and the information transmission is performed according to a first communication procedure, when a specific receiving station ID 43 can be specified or a second communication procedure, when the ID 43 is not able to be specified. Consequently, a transmitting transmitter can use different transmission protocols, in the case of performing the information transmission to the specific communication station and another case of performing the information transmission to another communication station, by identifying the information on the destination of the information transmission through the formation of the transmitted asynchronous transmission packet in the unit of a prescribed fragment by using this method as a method of transmitting asynchronous information through a radio network.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio transmission method and a radio transmission which are preferably applied to, for example, transmitting a radio signal to various devices to form a local area network (LAN) between a plurality of devices. It concerns the device.

[0002]

2. Description of the Related Art In a conventional wireless local area network, a method of transmitting certain asynchronous information from an information transmission source station to a control station of a network and retransmitting the information from a base station to an information reception destination station. Therefore, even when performing unicast transmission, which is information transmission to a specific communication station, information has been delivered to all communication stations in the wireless network.

As a conventional method of transmitting asynchronous information in a wireless network, a method of transmitting information from an information transmission source to an information reception destination, and then returning a reception confirmation of the information from the reception destination to the transmission source is known. Has been used. According to this method, a method of performing error-free information transmission by retransmitting information that has failed to be received at a reception destination from a transmission source has been performed.

When it is necessary to simultaneously deliver the same information to an unspecified number of users, the same information is transmitted from the information source multiple times without specifying the information receiving destination, and the information is transmitted to the receiving destination. Among them, a method of removing duplicate information has been used.

Further, Japanese Patent Application Laid-Open No. Hei 10-173668 discloses that when a response confirmation is not performed between a transmitting side and a receiving side,
A LAN system is disclosed in which a transmitting terminal repeatedly transmits the same frame to a receiving terminal a plurality of times. This discloses that the transmitting side transmits the same frame a plurality of times, thereby increasing the probability of successful reception and enabling high-quality communication.

[0006]

According to the above-mentioned conventional method for transmitting asynchronous information in a wireless local area network, broadcast transmission can be performed to all communication stations in the wireless network even when unicast transmission is performed. However, even if the information transmission source station and the information reception destination station can communicate directly, the information transmission is once performed via the control station, so that the wireless transmission path is wastefully used. There was an inconvenience.

On the other hand, in a wireless network that allows unicast transmission of asynchronous information, if it is desired to perform broadcast transmission, which is information transmission not addressed to a specific communication station, the information is temporarily transmitted to a control station as in the prior art. However, there is an inconvenience that it is necessary to perform broadcast transmission from the control station.

However, in the case of multicast transmission in which transmission is performed to a plurality of information destinations, transmission from the control station is useless if communication can be performed from the information transmission source station to all information reception destination stations. There was an inconvenience.

Further, in the conventional method of returning the acknowledgment of information from the receiving destination to the transmitting source, when the acknowledgment is returned from a plurality of receiving destinations on the corresponding network for the same information, Since acknowledgments from multiple recipients are collected and all information that could not be received by any one recipient must be retransmitted again, efficiency tends to decrease. There was an inconvenience.

Further, in the LAN system described in Japanese Patent Application Laid-Open No. 10-173668, when a response is not confirmed between the transmitting side and the receiving side, the transmitting side terminal transmits a plurality of identical frames to the receiving side terminal. In the case of repeated transmission, there is an inconvenience that frame information cannot be obtained unless any one of the frames can be received without error in the receiving terminal.

When relay transmission of broadcast transmission is always performed via the control station, if the transmission apparatus at the information source can directly communicate with all transmission apparatuses on the network, the control station transmits There is a disadvantage that the retransmission of the message is wasted.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless transmission method and a wireless transmission device capable of performing efficient information transmission according to the type of information transmission. And

[0013]

According to the wireless transmission method of the present invention, destination information is identified from asynchronous information to be transmitted, and when a specific destination can be identified, information is transmitted according to a first communication procedure. Transmission is performed, and when a specific destination cannot be specified, information transmission is performed according to the second communication procedure.

Thus, as a method of transmitting asynchronous information in a wireless network,
Asynchronous information to be transmitted is packetized in a predetermined fragment unit, destination information of information to be transmitted is identified, and different transmission protocols are used for information transmission to a specific communication station and information transmission not to a specific communication station. be able to.

Further, according to the radio transmission method of the present invention, acknowledgment information (ACK: Acknowle) is received from an information receiver in unicast transmission, which is information transmission to a specific communication station.
dge) A packet is returned, and retransmission control is performed based on the reception.

[0016] With this, when a specific destination can be specified, a reception confirmation information packet is returned from the destination, and
On the transmitting side, a protocol for reliably transmitting information by the automatic retransmission control method can be applied based on the acknowledgment information, the reception timer, and the number of transmissions.

Further, in the radio transmission method according to the present invention, in broadcast transmission which is information transmission not addressed to a specific communication station, the same information is transmitted from the information receiving destination a plurality of times, and the receiving destination duplicates the information. It removes information.

In this way, when a specific destination cannot be specified, the same information is transmitted a plurality of times from the source based on a predetermined time and the number of times of transmission, thereby performing recovery in the event of a transmission error. be able to.

Further, the source divides the asynchronous information into a predetermined fragment size to form a packet, transmits the packet, and collects the unreceived packets on the receiving side to reconstruct the original asynchronous information. The original asynchronous information can be reconstructed by selectively retransmitting the unreached packets and selectively collecting the fragmented packets even when the same information is received a plurality of times.

Further, the radio transmission apparatus of the present invention determines whether or not relay transmission is necessary in the transmission apparatus at the information transmission source, and performs relay transmission when relay transmission is unnecessary. Not something.

Here, if the transmission source can directly transmit to all communication stations on the network, the transmission is performed a plurality of times from the transmission source. If the transmission source cannot directly transmit to all communication stations on the network, the transmission is performed a plurality of times from the transmission source, and the information is relay-transmitted by the control station.

In this way, when communication cannot be performed with all the destination transmission apparatuses of the information, a relay transmission request is made via an arbitrary communication station, and communication with all the destination transmission apparatuses is performed. Can be performed, relay transmission is not performed.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION
The source transmission device fragments the asynchronous information to be transmitted into a predetermined size, identifies the destination information of the information to be transmitted, and determines whether to transmit information addressed to a specific communication station or not to a specific communication station. Then, different transmission protocols are applied.

The present embodiment will be described below. FIG. 1 is a diagram illustrating a configuration example of a network system to which the wireless transmission method according to the present embodiment is applied. For example, as shown in FIG. 1, a personal computer 1 and a printer output device 2 are connected to the wireless transmission device 11 via a cable or the like by wire. A VTR (video tape recorder) 3 is similarly connected to the wireless transmission device 12 via a cable or the like. Similarly, the telephone device 5 and the set-top box 4 are connected to the wireless transmission device 13 via a cable or the like.
Is connected by wire. Similarly, the television receiver 6 and the game device 7 are connected to the wireless transmission device 14 via a cable or the like by wire. In this way, each device is connected to each wireless transmission device, and each wireless transmission device constitutes the network 10. Here, the wireless transmission device 1
4 is a control station of the network 10, and the other wireless transmission devices 11 to 13 are communication stations.

FIG. 2 shows a configuration example of the radio transmission devices 11 to 14 constituting each communication station. Here, each of the wireless transmission devices 11 to 14 basically has a common configuration, and includes an antenna 21 that performs transmission and reception, and a wireless transmission processing unit 22 that is connected to the antenna 21 and performs wireless transmission processing and wireless reception processing. And wireless transmission with other transmission devices is possible.

In this case, as a transmission method in which transmission and reception are performed by the wireless transmission processing unit 22 of this example, for example, OF
DM (Orthogonal Frequency D)
A transmission method using a multicarrier signal called an "vision Multiplex (orthogonal frequency division multiplex)" method is applied, and a frequency used for transmission and reception is, for example, a very high frequency band (for example, a 5 GHz band).
Is used.

In the case of this example, a relatively weak output is set for the transmission output. For example, when used indoors, wireless transmission over a relatively short distance of about several meters to several tens of meters can be performed. There is as much output.

The radio transmission processing unit 22 has a mechanism for detecting a specific frequency carrier on the radio transmission path and detecting a synchronizing signal. When the synchronizing signal is received, an information portion following the synchronizing signal is received. It has a configuration.

Further, a reception control processing section 23B for performing reception decoding processing of various transmission information on a signal received by the radio transmission processing section 22, and a transmission buffer for storing information to be transmitted by the radio transmission processing section 22. 23A.

The information conversion unit converts the information signal received by the reception control processing unit 23B into packet data, and converts the information signal stored in the transmission buffer 23A as packet data transmitted by the radio transmission processing unit 22. The processing unit 24 is provided.

Further, the data converted by the information conversion processing unit 24 is supplied to the connected device 29 via the interface unit 25, and the data supplied from the connected device 29 is supplied to the interface unit 25. The information can be supplied to the information conversion processing unit 24 via the data conversion processing.

Here, as an external interface of the interface unit 25 of the wireless transmission device, for example, IE
High-speed serial bus 2 such as EE1394 format
8, audio and video information or various data information can be transmitted and received to and from the connected device 29.

Alternatively, these wireless transmission devices may be built in the main body of the device 29 to be connected.

Each unit in each wireless transmission device is configured to execute processing based on the control of the control unit 26 composed of a microcomputer or the like.

At this time, the information to be asynchronously transmitted and taken into the information conversion processing unit 24 via the interface unit 25 is first packetized by the information conversion processing unit 24 into a predetermined fragment size.

Then, according to the control of the control unit 26, each transmission protocol is selected from the destination information and stored as asynchronous transmission packet information in the transmission buffer 23A, and the information is transmitted based on the predetermined access control according to the protocol. The configuration is as follows.

In this case, when the signal decoded by the reception control processing unit 23B is asynchronous information, if the signal is unreachable information, it is stored in the information conversion processing unit 24.

Further, referring to the destination address of the packet, the type of the transmission protocol is determined, and under the control of the control unit 26, if the ACK information needs to be returned, the ACK information is constructed and stored in the transmission buffer 23A. I do.

When the signal decoded by the reception control processing section 23B is ACK information, information which needs to be retransmitted is determined from the content of the received ACK information under the control of the control section 26, and Packet information to be retransmitted is selected from the packets stored in the conversion processing unit 24 and stored in the transmission buffer 23A.

As a predetermined access control method, for example,
As a method of transmitting information in response to polling control from the control station, the transmission device 14 of the control station determines a predetermined access control signal (transmission permission signal) when it determines that the transmission line for performing asynchronous transmission is idle. ) Is transmitted to transmission devices 11 to 13 other than the control station.

In the transmission devices 11 to 13 other than the control station, when the received signal is an access control signal (transmission permission signal), information transmission processing of the transmission buffer 23A is performed.

The signal decoded by the reception control processing unit 23B is
When the received information is information in the management information transmission area, the control unit 26 sets each unit to the state indicated by the received control signal.

Further, the control unit 26 has an internal memory 27
Is connected, and its internal memory 27 is configured to temporarily store data necessary for communication control, information on the number of communication stations constituting a network, information on how to use a transmission path, and the like.

Further, in the transmission device 14 of the control station, the control unit 26 transmits a synchronization signal of downlink management information (FS) shown in FIG. The data is supplied to the processing unit 22 and wirelessly transmitted.

In the transmission devices 11 to 13 other than the control station, when the received signal is the synchronization signal of the downlink management information (FS), the reception timing of the synchronization signal is controlled by the control unit 2.
6, the frame synchronization based on the synchronization signal is set, and the communication control process is executed in the frame cycle.

FIG. 3 is a diagram showing a configuration example of a wireless transmission frame according to the present embodiment. Here, a frame is defined and shown for convenience, but it is not always necessary to adopt such a frame structure. In the figure, in the wireless transmission path 30, a transmission frame arriving at a constant transmission frame period 31 is defined, and a management information transmission area 32 and an information transmission area 33 are provided therein.

At the beginning of this frame, a downlink management information transmission section 34 (frame start (FS: Frame Sta) for reporting frame synchronization and network common information) is provided.
rt)) section is arranged, followed by the time information correction transmission section 35 (cycle report (CR:
Cycle Report), and a station synchronization signal transmission / reception section 36 (station sync (SS: S
station Sync)).

The downlink management information transmission section (FS) is used for transmitting information that needs to be shared in the network from the control station, and is composed of a fixed length area and a variable length area.

In the fixed length area, in order to specify the length of the variable length area, the number of communication stations transmitted in the station synchronization signal transmission / reception section (SS) is specified, and the number of band reservation transmission areas (RSV) is specified. Designation is performed, and in the variable length area, a communication station to be transmitted in the station synchronization signal transmission / reception section (SS) and a bandwidth reservation transmission area (RSV) are specified.

The station synchronization signal transmission / reception section (SS) has a predetermined length, and the communication station transmitting the communication station has a certain period according to the downlink management information for each communication station constituting the network. It is considered that a configuration is assigned to each of them.

For example, this station synchronization signal transmission / reception section (SS)
By receiving everything except the transmission part of the own station,
It is possible to grasp the state of a connection link with a communication station existing around the own station.

Further, by reporting the connection link status in the information transmitted by the next station in the station synchronization signal transmission / reception section (SS), each communication station can grasp the connection status of the network. There is a configuration that can be.

The information transmission area 33 is a bandwidth reservation transmission area (RSV: Reserve) 37 set as needed.
A centrally managed asynchronous transmission area (ASY: Asynchronous) 38 in which the control station performs transmission control, and an unused area (NUA: Not UsageAr) in which the control station does not perform transmission control and permits use in other wireless systems.
ea) 39.

That is, if there is no need for the bandwidth reservation transmission (RSV) or the unused area (NUA), the information transmission area 33
Can be transmitted as a centrally managed asynchronous transmission area (ASY) 38.

By adopting such a frame structure, in the band reservation transmission area (RSV) 37, for example, the IE
Isochronous transmission defined by the EE1394 format is performed, and in an asynchronous transmission area (ASY) 38, an asynchronous (Async) signal is transmitted.
It is preferable to adopt a configuration capable of performing, for example, (hronous) transmission.

FIG. 4 is a diagram showing a configuration example of an asynchronous (asynchronous transmission) packet transmitted wirelessly. FIG.
, The asynchronous (asynchronous transmission) packet is
A packet type 41 indicating the type of the packet such as a data packet, an ACK packet, or a control packet, a source communication station ID 42 in which an address of a communication station which is a source of the packet is described, and a destination of the packet. Destination communication station ID 43 in which the address of the communication station
And, if necessary, a relay communication station ID 44 in which the address of a communication station to be relayed is described.

If the receiving destination cannot be specified, all-station receiving is designated (3F) in the receiving communication station ID 43.
Is described so as to be able to be identified by the destination transmission device.

Further, the asynchronous (asynchronous transmission) packet has a flag 45 indicating the status of the fragment of the packet, a sequence number 46 for individually identifying the packet, and an information amount included in the packet. It has a content length 47 to represent and a spare 48 prepared for future expansion.

The sequence number 46 is used to notify the ACK packet that the reception has been confirmed.

The asynchronous (asynchronous transmission) packet includes an asynchronous (asynchronous transmission) payload 49 provided for each predetermined fragment size and a CR, which is a code used for error detection of the packet.
C (Cyclic Redundancy Chec)
k) 50.

FIG. 5 is a diagram showing a list of address settings specified by the transmission source. In FIG. 5, when direct unicast transmission 51 is performed, source address designation 58 is performed for source communication station ID 55, and destination communication station ID 56
Destination address designation 62, and the relay communication station ID 57
Perform the source address designation 66 and do not perform the relay transmission.

When the direct broadcast transmission 52 is performed, the source address designation 59 is performed for the source communication station ID 55, the all-station reception specification (: 3F) 63 is performed for the destination communication station ID 56, and the relay communication station ID 57 Perform the source address designation 67 and do not perform the relay transmission.

When the relay unicast transmission 53 is performed, the source communication station ID 55 includes the source address designation 6
0, a destination address designation 64 is made to the destination communication station ID 56, a relay station address designation 68 is made to the relay communication station ID 57, and a relay transmission request is made.

When performing the relay broadcast transmission 54, the source address designation 61 is set to the source communication station ID 55, the all-station reception designation (: 3F) 65 is set to the destination communication station ID 56, and the relay communication station ID 57 is set. , A relay station address designation 69 is made, and a relay transmission request is made.

FIG. 6 is a diagram showing a slow chart of a process of transmitting asynchronous information in the information transmission transmission device. FIG.
In step S1, asynchronous (asynchronous transmission) information is fragmented into a predetermined size to construct a wireless transmission packet.

Then, in step S2, the destination information added to the above-mentioned asynchronous information is obtained.
In step S3, it is determined whether it is possible to specify which communication station the information is addressed to.

If the communication station can be specified in step S3, the address of the destination communication station is specified in step S4. If the communication station cannot be specified in step S3, all-station reception (: 3F ).

Thereafter, in step S6, referring to the connection link information, it is determined in step S7 whether or not relay transmission is necessary. If relay transmission is required in step S7, the address of the relay station is specified in step S8. If no relay transmission is required in step S7, the process proceeds to step S9.

Then, in step S9, it is determined whether or not this information transmission is a unicast transmission request. If it is unicast transmission in step S9, the first protocol is selectively designated in step S10. If it is not unicast transmission in step S9, the second protocol is selectively designated in step S11. To be specified.

FIG. 7 shows a first example of the information transmission source transmission device.
FIG. 5 is a diagram showing a flowchart by the transmission protocol processing of FIG. First, in step S21, a predetermined maximum number of transmissions is specified, and in step S22, a predetermined reception confirmation reception timer is set.

Then, in step S23, it is determined whether or not a predetermined access control right has been obtained. If the access right has been obtained, a data packet is wirelessly transmitted in step S24.

Thereafter, in step S25, the reception of an ACK packet from the information reception destination is waited. If there is no reception, the timeout of the acknowledgment timer is detected in step S26. If not, the process returns to step S25. .

If it is determined in step S25 that an ACK packet has been received from the information receiving destination, the process proceeds to step S27.
It is determined whether or not all data have been received. If the reception of all the data is completed in step S27, the process exits.

If it is determined in step S27 that the reception of all data has not been completed, the process proceeds to step S28, and only unreachable information is constructed as a retransmission packet. Step S
In step 26, even if the reception confirmation timer times out, the process shifts to step S28 to construct only the unreachable information as a retransmission packet.

In step S29, it is determined whether the maximum number of transmissions has been exceeded.
Returning to step 2, retransmission is performed. In step S29,
If the maximum number of transmissions has been exceeded, the occurrence of a transmission failure is displayed in step S30, and the process exits from the series of processes.

FIG. 8 shows a second example of the information transmission source transmission apparatus.
FIG. 5 is a diagram showing a flowchart by the transmission protocol processing of FIG. First, in step S31, a predetermined maximum number of transmissions is specified, and in step S32, a predetermined transmission end timer is set.

Then, in step S33, it is determined whether or not the transmission end timer has timed out, and if it has timed out, the process exits.

In step S33, if the transmission end timer has not timed out, step S34
Then, it is determined whether or not a predetermined access control right has been obtained. If the access right has been obtained, a data packet is wirelessly transmitted in step S35.

If it is determined in step S34 that the access right has not been obtained, the process returns to step S33 to check the timeout of the transmission end timer and perform retransmission.

Thereafter, in step S36, it is determined whether or not the maximum number of transmissions has been exceeded. If not, the flow returns to step S33 to check the timeout of the transmission end timer and perform retransmission. If the maximum number of transmissions has been exceeded, a series of processing is exited.

FIG. 9 is a diagram showing a flowchart of the asynchronous information receiving process in the information receiving destination transmitting apparatus. First, in step S41, a destination communication station address is acquired, and in step S42, it is determined whether or not the packet is a unicast packet. If the packet is a unicast packet in step S42, an ACK packet is constructed in step S43. If the packet is not a unicast packet in step S42, step S4
Move to 4.

Then, in step S44, it is determined whether or not an unreceived packet has been received. If the packet has not been received, the received packet is stored in step S45. If it is not a received packet in step S44, the process proceeds to step S46.

Further, in step S46, it is determined whether or not all the fragmented packets have been received. If there is unarrived information, the flow returns to step S41.

If all the fragmented packets are received in step S46, step S4
7 and reconstruct the original asynchronous packet.

Thereafter, in step S48, it is determined whether or not the processing of all the received packets has been completed. If not, the flow returns to step S41.

If it is determined in step S48 that the processing of all the received packets has been completed, it is determined in step S49 whether a unicast packet has been received. If no unicast packet has been received, the process exits. .

If it is determined in step S49 that a unicast packet has been received, the flow shifts to step S50 to determine whether or not the access control right has been acquired. Is transmitted wirelessly, and the process goes through a series of processes.

Although the above-described embodiment has been described with reference to an example applied to the wireless 1394, it is needless to say that the present invention is not limited to this and can be applied to other wireless networks.

[0089]

According to the radio transmission method of the present invention, a transmission method when a destination can be specified by referring to destination information of asynchronous information to be transmitted, and a transmission method when a destination cannot be specified Therefore, by using different transmission protocols, it is possible to achieve an optimum information transmission.

Further, according to the radio transmission method of the present invention, if the destination can be specified, retransmission is performed until a reception confirmation is received from the destination, so that information transmission can be reliably performed to the destination. This has the effect that it can be performed.

At this time, by packetizing the packet in a predetermined fragment unit and returning the acknowledgment information in the fragment unit, only the unreachable packet can be selectively retransmitted. There is an effect that the amount of information transmission can be suppressed.

Further, according to the radio transmission method of the present invention, when the receiving destination cannot be specified, the reception confirmation is not individually received from the receiving destination, so that the information transmission amount on the radio transmission path is reduced. Can be suppressed.

[0093] At this time, by packetizing a predetermined fragment unit, when the same information is repeatedly transmitted, a packet that cannot be obtained in the first transmission is
The possibility of being obtained by the next transmission is increased, and the effect is obtained that the original asynchronous information is easily reconstructed.

Further, according to the radio transmission method of the present invention, by judging whether or not relay transmission is necessary, careless relay transmission is not performed, and the amount of information transmission on the network can be reduced. This has the effect of being able to be reduced by half.

Further, according to the radio transmission apparatus of the present invention, the case where the transmission destination can specify the destination by referring to the destination information of the asynchronous information to be transmitted,
There is an effect that transmission control with a different communication procedure can be performed when a destination cannot be specified.

Further, according to the radio transmission apparatus of the present invention, the source transmission apparatus packetizes the asynchronous information to be transmitted in predetermined fragment units and transmits the packet, and the destination transmission apparatus selects a packet which has not been reached. Receiving,
This has the effect that the original asynchronous information can be reconstructed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a wireless network configuration to which a wireless transmission method according to an embodiment is applied.

FIG. 2 is a diagram illustrating a configuration example of a wireless transmission device configuring each communication station.

FIG. 3 is a diagram illustrating a configuration example of a wireless transmission frame.

FIG. 4 is a diagram illustrating a configuration example of an asynchronous (asynchronous transmission) packet.

FIG. 5 is a diagram showing an address setting list.

FIG. 6 is a flowchart illustrating asynchronous information transmission processing.

FIG. 7 is a flowchart illustrating a first protocol process.

FIG. 8 is a flowchart showing a second protocol process.

FIG. 9 is a flowchart showing an asynchronous information receiving process.

[Explanation of symbols]

10 network, 11, 12, 13, 14 wireless transmission device, 21 antenna, 22 wireless transmission processing unit, 23A transmission buffer, 23B reception control processing unit, 24 information conversion Processing unit, 25 external interface unit, 26 control unit, 27 internal memory, 2
8 ... serial bus, 29 ... connected devices, 41 ...
... Packet type, 42 ... Source communication station ID, 43 ...
... Receiver communication station ID, 44 ... Relay communication station ID, 45 ...
... Flag, 46 ... Sequence number, 47 ... Content length, 48 ... Reserved, 49 ... Asynchronous (asynchronous transmission) payload, 50 ... CRC, 51 ... Direct unicast transmission, 52 ... Direct broadcast transmission 5
3. Relay unicast transmission 54 Relay broadcast transmission

Continued on the front page (72) Inventor Takehiro Sugita 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5K033 AA07 BA01 BA15 CA17 CB04 CB13 CB14 CC01 DA17 DB12 DB18 EC03 5K034 AA06 CC01 DD03 EE03 FF02 HH04 HH05 HH11 HH18 HH63 KK21 LL01 MM03

Claims (6)

[Claims] 1. A wireless transmission method in which a wireless network is configured using a plurality of transmission devices serving as communication stations and asynchronous transmission is performed in a corresponding wireless network. When the destination information of the information to be transmitted is identified and the destination transmission device can be identified, the information is transmitted according to the first communication procedure. When the destination transmission device cannot be identified, the destination information is transmitted. 2. A wireless transmission method, wherein information is transmitted according to the communication procedure of 2. 2. The wireless transmission method according to claim 1, wherein, as the first communication procedure, an acknowledgment of the packet received from the destination transmission device is returned, and a predetermined time and the number of transmissions are not reached. Wireless transmission method characterized by retransmitting a packet that has not arrived from a source transmission device. 3. The wireless transmission method according to claim 1, wherein, when the predetermined transmission available time and the number of transmissions are not reached from the transmission source device, the same packet is transmitted and received as the second communication procedure. A wireless transmission method characterized by removing duplicate packets received by a destination transmission device. 4. A wireless transmission method in which a wireless network is configured using a plurality of transmission devices serving as communication stations and asynchronous transmission is performed in a corresponding wireless network, a source transmission device acquires current link information, If direct communication is not possible with all destination transmission devices of the information, a relay retransmission request is made to another communication station, and if direct communication is possible, no relay retransmission is performed. A wireless transmission method characterized by the above-mentioned. 5. A wireless transmission apparatus for configuring a wireless network using a plurality of transmission apparatuses serving as communication stations and performing asynchronous transmission in the corresponding wireless network, wherein a transmission source apparatus identifies a type of information to be transmitted. Identification means; first transmission means for transmitting information in accordance with a first communication procedure when a specific destination of the information destination can be specified; and a specific reception destination of the information destination cannot be specified And a second transmission unit for transmitting information in accordance with a second communication procedure. 6. A wireless transmission device that configures a wireless network using a plurality of transmission devices serving as communication stations and performs asynchronous transmission in a corresponding wireless network, wherein a receiving destination transmission device deletes redundantly received information. Deleting means for identifying received information, and returning means for returning a predetermined acknowledgment to the transmission source device when information is transmitted according to a predetermined communication procedure according to the information. A wireless transmission device comprising: