JP2008206175A - Communication device, communication system, communication method, communication program, communication circuit, mobile phone, display device, printing apparatus, and recoridng apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication device, a communication system, a communication program, and a communication circuit in which a time required for connection and disconnection is shortened. <P>SOLUTION: There is provided a network layer protocol used for optical space transmission using an LED or LD as a light source. When establishing communication connection with a partner device, a network layer issues a connection request command (LAP-con-req2) to a lower layer if a connection request command (LM-con-req1) is received from an upper layer and the network layer issues a connection confirmation command reception report (LM-con-conf2) to the upper layer without issuing a data transfer request command to a lower node layer if a connection confirmation command reception report (LAP-con-conf1) is received from the lower layer. Thus, it is possible to obtain the network layer protocol in which the time required for connection and disconnection is shortened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication device, a communication system, a communication method, a communication program, and a communication circuit that perform wireless or wired communication.

  Currently, an IrDA (Infrared Data Association) system is known as a standard for spatial communication using light. In this IrDA system, IrLMP (Infrared Link Management Protocol) is used as a network layer protocol.

  In IrLMP, station management (Station Control) that manages each process of connection and disconnection with another device via IrLAP (Infrared Link Access Protocol), which is a lower layer, and LSAP that logically manages the connection (Link Service Access Point).

  When connecting to the opposite device, as shown in FIG. 3, the connection request command 1 containing data necessary for the LSAP of the primary station (Initiating) to connect to the secondary station (Responding) from the upper layer of the primary station. When (LM_con_req1) is received, a connection request command 2 (LS_con_req2) is issued to the station management of the primary station, and the station management of the primary station performs connection request command 3 to IrLAP of the primary station which is a lower layer. (LAP_con_req3) is issued.

  The IrLAP of the primary station receives this connection request command 3 and outputs an SNRM command to the secondary station that is the opposite device at a transfer speed of 9600 bps. Upon receiving the SNRM command, the IrLAP of the secondary station issues a connection request command reception notification 1 (LAP_con_ind1) to the station management (Station Control) inside the IrLMP layer of the secondary station, The station management issues a connection confirmation command 1 (LAP_con_rsp1) to the IrLAP of the secondary station.

  The IrLAP of the secondary station receives the connection confirmation command 1 and outputs a UA response to the primary station at a transfer rate of 9600 bps. The IrLAP of the primary station receives the UA response and notifies the station management of the primary station of the connection confirmation command reception notification 1 (LAP_con_conf1) to the station management of the primary station, and the station management of the primary station performs the connection confirmation command reception notification 2 (LS_con_conf2). Is issued to the LSAP of the primary station.

  The LSAP of the primary station receives the connection command reception notification 2 and issues a data transmission request 1 (LAP_Data_req1) for transmitting data in the connection request command 1 to IrLAP. In response, the I frame is output to the secondary station. The transfer rate of the I frame at this time is a transfer rate determined by the lower IrLAP layer by exchanging the SNRM command and the UA response, and has values such as 115.2 kbps and 4 Mbps, for example.

  The IrLAP of the secondary station receives this I frame, issues a data reception notification 1 (LAP_Data_ind1) to the LSAP of the secondary station, and passes the data to the LSAP of the secondary station.

  The LSAP of the secondary station receives this parameter and issues a connection request command 4 (LS_con_req4) to the station management of the secondary station. The station management of the secondary station receives this connection request command 4 and connects A confirmation command reception notification 3 (LS_con_conf3) is issued to the LSAP of the secondary station.

  The LSAP of the secondary station issues a connection request command reception notification 2 (LM_con_ind2) containing data necessary for connection from the primary station to the upper layer of the secondary station. The upper layer of the secondary station receives this connection request command reception notification 2 and issues a connection confirmation command 4 (LM_con_rsp4) containing data necessary for connection with the opposite device to the LSAP of the secondary station. The LSAP of the secondary station receives this connection confirmation command 4 and issues a data transmission request 2 (LAP_DATA_req2) to the IrLAP of the secondary station.

  In response, the IrLAP of the secondary station transmits an I frame to the primary station. The IrLAP of the primary station that has received the I frame issues a data reception notification 2 (LAP_Data_ind2) to the LSAP of the primary station, and the LSAP receives a connection confirmation command reception notification 4 containing data necessary for connection from the secondary station ( Issue LM_con_conf4). With this series of operations, the connection sequence of the IrLMP layer is completed.

  In the disconnection with the opposite device, as shown in FIG. 4, the upper layer of the primary station issues a disconnection request command 1 (LM_disc_req1) containing data necessary for disconnection. In response to this disconnection request command 1, the LSAP of the primary station issues a data transmission request (LAP_Data_req) in order to transmit the data of the disconnection request command 1. In response to this data transmission request, the IrLAP of the primary station transmits an I frame to the secondary station. The IrLAP of the secondary station receives the I frame and issues a data reception notification (LAP_Data_ind) to the LSAP.

  The LSAP of the secondary station determines that the data in this data reception notification is a request for disconnection, issues a disconnection request 3 (LS_disc_req3) to the station management of the secondary station, and Then, a disconnect command reception notification (LM_disc_ind) containing data necessary for disconnection from the primary station is issued. On the other hand, after issuing the data transmission request, the LSAP of the primary station issues a disconnection request command 2 (LS_disc_req2) to the station management of the primary station.

The station management of the primary station receives the disconnection request command 2 to perform disconnection processing and issues a disconnection request command 4 (LAP_disc_req4) to the IrLAP of the primary station. The IrLAP of the primary station receives the disconnect request command 4 and issues a DISC command to the secondary station. The IrLAP of the secondary station receives the DISC command and sends a UA response as a response to the primary station. Send. With these series of operations, the cutting sequence of the IrLMP layer is completed.
Infrared Data Association Link Management Protocol Version 1.1 [Search date 2005.1.21], Internet <URL: http: //irda.affiniscape.com/displaycommon.cfm? An = 1 & subarticlenbr = 7>

  However, in the above-described conventional configuration, SNRM command, UA response, I frame, Ack, I frame, and Ack 6 packets are exchanged between devices when connected by the above method, and when disconnected, I frame, Ack, DISC command , 4 packets of the UA response are exchanged.

  In the infrared communication, since the reception can be started after the transmission / reception module has finished transmitting light, a certain time or more is required. The reason for this is that in the case of communication between devices, the receiving module is operating even during transmission, and the wraparound of transmitted light is received. This is because it is necessary to discharge and reset a passive circuit such as a capacitor in the receiving circuit to stop the transmitted light so that light can be reliably received from the counterpart device.

  In this way, the waiting time for switching is specified to be 1 mS (milliseconds) or more in the case of data communication at a transfer rate of 4 Mbps, but it actually takes about 10 mS, and together with the time taken for packet transmission, the LAP When connecting to the layer (when exchanging SNRM command and UA response), it takes 100mS to 200mS, and when connecting to the LMP layer (exchanging I frame and Ack), it takes 50mS to 100mS. As a result, it takes a long time to start transmitting data to be transmitted, resulting in a problem that communication efficiency is lowered as a whole.

  In addition, in IrDA, if there is no response from the opposite station in the connection process, there is a problem that the connection cannot be completed and the connection and data transfer in one-way communication cannot be performed.

  An object of the present invention is to provide a communication device, a communication system, a communication method, a communication program, and a communication circuit that require a short time for connection and disconnection.

  In order to achieve the above object, a communication device according to the present invention has a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer. A communication device as a primary station that communicates with the next station. When a communication connection is made with the secondary station, when a connection request command is received from the upper layer in the network layer, a connection request command is sent to the lower layer. A network layer protocol control unit that issues a connection confirmation command reception notification to the upper layer without issuing a data transfer request command to the lower layer when a connection confirmation command reception notification is received from the lower layer. The unit is configured to create a logical channel with a predetermined fixed value when receiving the connection confirmation command reception notification.

  The communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. A communication method in a communication device as a station, and when a communication connection with a secondary station is performed, when a connection request command is received from an upper layer in the network layer, a connection request command is issued to the lower layer, and the lower layer A method of issuing a connection confirmation command reception notification to the upper layer without issuing a data transfer request command to the lower layer when receiving a connection confirmation command reception notification from the network, and creating a logical channel with a predetermined fixed value It is.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and a secondary that communicates with a primary station. A communication device as a station that receives a connection request command without issuing a data transfer request command to the lower layer when receiving a connection request command reception notification from the lower layer when making a communication connection with the primary station A network layer protocol control unit that issues a notification to an upper layer and issues a connection confirmation command to a lower layer when a connection confirmation command is received from the upper layer, and the network layer protocol control unit includes the network layer protocol control unit Is a configuration in which the value of the logical channel created by the primary station is preset.

  In addition, the communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a primary station. A communication method in a communication device as a station, and when a communication connection with a primary station is made, when a connection request command reception notification is received from the lower layer, a data transfer request command is not issued to the lower layer A request command reception notification is issued to the upper layer, and when a connection confirmation command is received from the upper layer, a connection confirmation command is issued to the lower layer, and a value preset as a logical channel value created by the primary station This is a method of performing communication connection using the logical channel.

  The communication system according to the present invention includes a communication device as the primary station and a communication device as the secondary station.

  According to the above configuration and method, when the primary station performs communication connection with the secondary station, the network station issues a connection request command to the lower layer when receiving a connection request command from the upper layer in the network layer, When a connection confirmation command reception notification is received from the lower layer, a connection confirmation command reception notification is issued to the upper layer without issuing a data transfer request command to the lower layer. On the other hand, when the secondary station establishes communication connection with the primary station, when it receives a connection request command reception notification from the lower layer, it does not issue a data transfer request command to the lower layer and sends a connection request command reception notification. When the connection confirmation command is received from the upper layer, the connection confirmation command is issued to the lower layer.

  Therefore, according to the above connection sequence, it is not necessary to perform communication for connecting the network layer after the lower layer is connected. Therefore, since the sequence at the time of connection is simplified, the communication efficiency can be improved.

  Further, when connection processing is performed, the logical channel is created with a fixed value determined in advance in the primary station, so that it is not necessary to issue a data transfer request command, and the conventional station management is not required. In addition, the communication efficiency can be improved.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and a secondary that communicates with a primary station. A communication device as a station that receives a connection request command without issuing a data transfer request command to the lower layer when receiving a connection request command reception notification from the lower layer when making a communication connection with the primary station A network layer protocol control unit that issues a notification to an upper layer, and the network layer protocol control unit is preset with a value of a logical channel created by the primary station in the network layer protocol control unit It is.

  In addition, the communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a primary station. A communication method in a communication device as a station, and when a communication connection with a primary station is made, when a connection request command reception notification is received from the lower layer, a data transfer request command is not issued to the lower layer In this method, a request command reception notification is issued to an upper layer, and communication connection is performed using a logical channel having a value set in advance as a logical channel value created by the primary station.

  The communication device may be realized by a computer. In this case, a communication program for the communication device that causes the communication device to be realized by the computer by operating the computer as the network layer protocol control unit, and A computer-readable recording medium on which is recorded also falls within the scope of the present invention.

  The communication device may be realized by a communication circuit that functions as the network layer protocol control unit.

  The communication device is suitable for a mobile phone that performs communication using the communication device.

  The communication device is suitable for a display device that displays data based on data received by the communication device.

  Further, the communication device is suitable for a printing apparatus that performs printing based on data received by the communication device.

  The communication device is suitable for a recording device that records data received by the communication device.

  Other objects, features, and advantages of the present invention will be fully understood from the following description. The advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.

  In order to achieve the above object, a communication device according to the present invention has a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer. A communication device as a primary station that communicates with the next station. When a communication connection is made with the secondary station, when a connection request command is received from the upper layer in the network layer, a connection request command is sent to the lower layer. A network layer protocol control unit that issues a connection confirmation command reception notification to the upper layer without issuing a data transfer request command to the lower layer when a connection confirmation command reception notification is received from the lower layer. The unit is configured to create a logical channel with a predetermined fixed value when receiving the connection confirmation command reception notification.

  The communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. A communication method in a communication device as a station, and when a communication connection with a secondary station is performed, when a connection request command is received from an upper layer in the network layer, a connection request command is issued to the lower layer, and the lower layer A method of issuing a connection confirmation command reception notification to the upper layer without issuing a data transfer request command to the lower layer when receiving a connection confirmation command reception notification from the network, and creating a logical channel with a predetermined fixed value It is.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and a secondary that communicates with a primary station. A communication device as a station that receives a connection request command without issuing a data transfer request command to the lower layer when receiving a connection request command reception notification from the lower layer when making a communication connection with the primary station A network layer protocol control unit that issues a notification to the upper layer and issues a connection confirmation command to the lower layer when a connection confirmation command is received from the upper layer is created by the primary station in the network layer protocol control unit The value of the logical channel to be set is set in advance.

  In addition, the communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a primary station. A communication method in a communication device as a station, and when a communication connection with a primary station is made, when a connection request command reception notification is received from the lower layer, a data transfer request command is not issued to the lower layer A request command reception notification is issued to the upper layer, and when a connection confirmation command is received from the upper layer, a connection confirmation command is issued to the lower layer, and a value preset as a logical channel value created by the primary station This is a method of performing communication connection using the logical channel.

  According to the above configuration and method, when the primary station performs communication connection with the secondary station, the network station issues a connection request command to the lower layer when receiving a connection request command from the upper layer in the network layer, When a connection confirmation command reception notification is received from the lower layer, a connection confirmation command reception notification is issued to the upper layer without issuing a data transfer request command to the lower layer. On the other hand, when the secondary station establishes communication connection with the primary station, when it receives a connection request command reception notification from the lower layer, it does not issue a data transfer request command to the lower layer and sends a connection request command reception notification. When the connection confirmation command is received from the upper layer, the connection confirmation command is issued to the lower layer.

  Therefore, according to the above connection sequence, it is not necessary to perform communication for connecting the network layer after the lower layer is connected. Therefore, since the sequence at the time of connection is simplified, the communication efficiency can be improved.

  Further, when connection processing is performed, the logical channel is created with a fixed value determined in advance in the primary station, so that it is not necessary to issue a data transfer request command, and the conventional station management is not required. In addition, the communication efficiency can be improved.

〔Overview〕
(Communication layer)
In each embodiment to be described later, configurations and operations of a transmitter and a receiver of a communication system according to the present invention will be described in detail based on an OSI 7 layer model. Here, the OSI 7 layer model is also called “OSI basic reference model” or “OSI hierarchical model”.

  In the OSI seven-layer model, in order to realize data communication between different models, the communication functions that the computer should have are divided into seven layers, and standard function modules are defined for each layer.

  Specifically, the first layer (physical layer) is responsible for electrical conversion and mechanical work for sending data to the communication line. The second layer (data link layer) secures a physical communication path and performs error detection of data flowing through the communication path. The third layer (network layer) selects a communication path and manages addresses in the communication path. The fourth layer (transport layer) performs data compression, error correction, retransmission control, and the like. The fifth layer (session layer) establishes and releases a virtual route (connection) for communication programs to exchange data. The sixth layer (presentation layer) converts data received from the fifth layer into a format that is easy for the user to understand, and converts data sent from the seventh layer into a format suitable for communication. The seventh layer (application layer) provides various services using data communication to humans and other programs.

  Each communication layer of the communication system according to each embodiment also has a function equivalent to the corresponding layer of the OSI 7 layer model. However, in each embodiment, the communication system has a six-layer structure in which the session layer and the presentation layer are combined into one. Further, description of the application layer is omitted.

  The present invention can be widely applied to communication systems in which a transmitter and a receiver establish communication of a plurality of communication layers and perform communication. That is, the division of the communication function may not follow the OSI 7 layer model. The number of communication layers can be arbitrarily selected as long as there are a plurality of communication layers to be connected.

  Further, the present invention reduces the time required for connection by collecting connection requests of a plurality of communication layers, so that reconnection is easy even when the communication path is disconnected. Therefore, the present invention is particularly suitable for wireless communication using, for example, infrared rays, which easily cuts the communication path. However, the present invention is also effective in other wireless communication and wired communication.

  In each embodiment, for convenience of explanation, description will be made based on IrSimple, which is an application example of the present invention. However, the present invention is not limited to IrSimple. Note that IrSimple is a partial improvement of conventional IrDA.

  In each embodiment, the data link layer, the network layer, the transport layer, and the session layer + presentation layer may be expressed as LAP, LMP, SMP, and OBEX, respectively, in accordance with IrSimple.

(IrLMP layer (LSAP))
The present invention mainly relates to the network layer. Hereinafter, the IrLMP layer, which is a network layer of IrDA and IrSimple, will be described.

  FIG. 12 is a signal sequence diagram for explaining connection and data transfer in the conventional IrDA.

  An IrLMP (Infrared Link Management Protocol) layer performs multiplexing in order to efficiently transfer data of a plurality of upper layer applications using an IrLAP layer that is a lower layer. Specifically, when a plurality of upper layer applications are activated in one-to-one communication or in one-to-N communication, the LMP layer creates a logical channel required for each application, Transmits and receives data using the channel. This logical channel is an LSAP (Link Service Access Point).

  For example, when a plurality of upper layer applications are activated in one-to-one communication, at the time of connection, the upper layer of the transmitter (primary station) makes a logical channel request of its own device to the LMP layer (for example, 1 ) And the logical channel of application 1 (app1) to be connected to the opposite device. Upon receiving this, the LMP layer of the primary station first completes the connection of the LAP layer by Station Control in charge of connection control of the LAP layer, and then transmits the source logical channel (SLSAP: Source Link Service Access Point of its own device). ) Is set to 1 described above and passed to the LAP layer as a data transfer request command (data is an LMP layer connection command). At this time, the transmission source logical channel (1) is held.

  Next, when the LMP layer of the receiver (secondary station) receives the above-described data transfer request command (data is an LMP layer connection command) from the lower layer, the LMP layer of the primary station in the connection command is selected. Analyze and notify the upper layer upon receiving the connection command. Upon receiving this, the upper layer of the secondary station sets the logical channel (SLSAP) (for example, 2) of the application 1 of the own device and the logical channel of the primary station to the logical channel of the opposite device, and as a connection response command, Pass to the LMP layer. Upon receiving this, the LMP layer of the secondary station receives the logical channel (SLSAP = 2) of the application 1 of the own device and the logical channel (DLSAP: Destination Link Service Access Point = 1) of the primary station from the higher layer. Set and pass to lower layer as data transfer request command (data is LMP layer connection response command).

  Next, when the LMP layer of the primary station receives this from the lower layer, the transmission destination logical channel (DLSAP = 1) in the connection response command is the same as the transmission source logical channel (1) held previously. Since they match, the upper layer application 1 is notified of the reception of the connection response command and the logical channel (2) of the secondary station.

  At the time of data transfer, the application 1 performs data transfer using the logical channel created at the time of connection. Specifically, at the time of data transfer, the primary station sets the transmission source logical channel (SLSAP = 1) and the transmission destination logical channel (DLSAP = 2) to transmit data, and the secondary station A transmission source logical channel (SLSAP = 2) and a transmission destination logical channel (DLSAP = 1) are set, and data is transmitted.

  In addition, the above connection process is performed in the same manner when the application 2 (app2) is connected.

(IrLMP layer issues)
In the infrared communication between devices equipped with the current IrDA, most of them are one-to-one communication, and most of the applications are file transfer (one application to be activated).

  As described above, in the current IrLMP standard, there is a process for creating a logical channel in order to realize communication with a 1-to-N device and data transfer at the time of activation of a plurality of applications. In most communications, since only one application is activated, only a logical channel is formally formed, and exchange of frames for this purpose is useless. That is, when communication is performed on a one-to-one device or when there is one application, processing at the station end point can be omitted.

  Therefore, it is conceivable to simplify the network layer by setting the above-mentioned logical channels in advance. However, with such a configuration, when only the connection data of the upper layer is included in the connection packet of the LAP layer, the connection process in the current IrLMP standard cannot be supported. The network layer of the present invention simplifies the connection / disconnection sequence while maintaining compatibility with the IrLMP standard on the premise of communication between one-to-one devices and one application.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS.

  The signal sequence diagram of the present embodiment is shown in FIG. 1 and the block diagram is shown in FIG. 5, but the present invention is not limited to this. Further, although OBEX and TinyTP are shown as upper layers in FIG. 5, the present invention is not limited to this. Further, although the network layer protocol control unit is described as a single layer in FIG. 5, the equivalent functions may be integrated into the upper layer or the lower layer, and the network layer protocol control unit may not exist alone. Each module in FIG. 5 may be software or hardware as long as the function can be realized.

  As shown in FIG. 1, first, the upper layer control unit 511 of the primary station issues a connection request command 1 (LM_con_req1) containing data necessary for connection. In response to the connection request command 1, the network layer protocol control unit 512 of the primary station transmits a connection request command 2 (LAP_con_req2) containing the data contained in the connection request command 1 to the IrLAP layer control unit 513. . The IrLAP layer control unit 513 of the primary station receives the connection request command 2 and transmits the SNRM command including the data contained in the connection request command 2 to the secondary station via the transmission unit 514.

  In the secondary station, the SNRM command is received by the receiving unit 515, and the IrLAP control unit 513 sends a connection request command reception notification 1 (LAP_con_ind1) including data contained in the SNRM command to the network layer protocol control unit 512. Issue. The network layer protocol control unit 512 of the secondary station issues a connection request reception notification 2 (LM_con_ind2) including the data contained in the connection request command reception notification 1 to the higher layer control unit 511. Upon receiving this connection request reception notification 2, the upper layer control unit 511 of the secondary station issues a connection confirmation command 1 (LM_con_resp1) including data necessary for connection with the primary station in order to establish a connection with the primary station. Issued to the network layer protocol control unit 512 of the secondary station.

  The network layer protocol control unit 512 of the secondary station issues a connection confirmation command 2 (LAP_con_rsp2) contained in the connection confirmation command 1 to the IrLAP layer control unit 513 of the secondary station. The IrLAP layer control unit 513 of the secondary station transmits a UA response including the data contained in the connection confirmation command 2 to the primary station via the transmission unit 514.

  The IrLAP layer control unit 513 of the primary station that has received the UA response by the reception unit 515 sends a connection confirmation command reception notification 1 (LAP_con_conf1) including data contained in the UA response to the network layer protocol control unit 512 of the primary station. Issue. The network layer protocol control unit 512 of the primary station receives the connection confirmation command reception notification 1 and sends a connection confirmation command reception notification (LM_con_conf2) including the data contained in the connection confirmation command reception notification 1 to the upper layer control unit 511 of the primary station. Issued against.

  Here, in the conventional IrDA, in the exchange of LAP_Data.reuest1 issued from the Initiating LSAP Connection endpoint and LAP_DATA_req2 issued from the Responding LSAP Connection endpoint in FIG. Exchange). On the other hand, in this embodiment, the network layer protocol control unit 512 of the primary station creates the logical channel with a predetermined fixed value when receiving the connection confirmation command reception notification 1 (LAP_con_conf1). I do.

  According to this series of connection sequences, it is possible to skip the process (station control) via the station management (Station control) between the primary station and the secondary station, and to end the packet. Since there are two UA responses, the communication efficiency can be improved compared to the conventional case.

Here, when each signal is expressed by an expression using the expression in FIG.
Connection request command 1: LM_con_req1 (AAA, Data1)
Connection request command 2: LAP_con_req2 (BBB, Data1)
Connection request command reception notification 1: LAP_con_ind1 (CCC, Data1)
Connection request command reception notification 2: LM_con_ind2 (DDD, Data1)
Connection confirmation command 1: LM_con_rsp1 (EEE, Data2)
Connection confirmation command 2: LAP_con_rsp2 (FFF, Data2)
Connection confirmation command reception notification 1: LAP_con_conf1 (GGG, Data2)
Connection confirmation command reception notification 2: LM_con_conf2 (HHH Data2)
It becomes.

  Since the SNRM command and the UA response are handled as packet formats transmitted from the LAP layer, they are not expressed by equations, and are omitted because they are not the gist of the present invention. AAA to HHH are parameters necessary for each signal. Data1 is contained in the signal of the rightward arrow shown in FIG. 1, and Data2 is contained in the signal of the leftward arrow shown in FIG.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS.

  The signal sequence diagram of the present embodiment is shown in FIG. 2 and the block diagram is shown in FIG. 5, but the present invention is not limited to this. Further, although OBEX and TinyTP are shown as upper layers in FIG. 5, the present invention is not limited to this. Further, although the network layer protocol control unit is described as a single layer in FIG. 5, the equivalent functions may be integrated into the upper layer or the lower layer, and the network layer protocol control unit may not exist alone. Each module in FIG. 5 may be software or hardware as long as the function can be realized.

  As shown in FIG. 2, at the time of disconnection, first, the upper layer control unit 511 of the primary station issues a disconnect request command 1 (LM_disc_req1) containing data necessary for disconnection. Upon receipt of the disconnection request command 1, the primary station network layer protocol control unit 512 receives the disconnection request command 2 (LAP_disc_req2) in which the data contained in the disconnection request command 1 is input to the IrLAP layer control unit 513 of the primary station. Send. The IrLAP layer control unit 513 of the primary station receives the disconnection request command 2 and transmits a DISC command including the data contained in the disconnection request command 2 to the secondary station via the transmission unit 514.

  The IrLAP layer control unit 513 of the secondary station that has received the DISC command at the reception unit 515 notifies the network request protocol reception unit 512 of the secondary station of the disconnection request command reception including the data contained in the DISC command. 1 (LAP_disc_ind1) is issued. The network protocol control unit 512 of the secondary station issues a disconnection request reception notification 2 (LM_disc_ind2) including the data contained in the disconnection request command reception notification 1 to the upper layer control unit 511 of the secondary station.

  Upon receiving this disconnection request reception notification 2, the upper layer control unit 511 of the secondary station issues a disconnection confirmation command 1 (LM_disc_resp1) including data necessary for disconnection from the primary station in order to disconnect the connection with the primary station. It is issued to the network protocol control unit 512 of the secondary station.

  The network layer protocol control unit 512 of the secondary station issues a disconnection confirmation command 2 (LAP_disc_rsp2) including the data contained in the disconnection confirmation command 1 to the IrLAP layer control unit 513 of the secondary station. The IrLAP layer control unit 513 of the secondary station transmits a UA response including the data contained in the disconnection confirmation command 2 to the primary station via the transmission unit 514. The IrLAP layer control unit 513 of the primary station that has received the UA response by the reception unit 515 sends a disconnection confirmation command reception notification 1 (LAP_disc_conf1) including the data contained in the UA response to the network layer protocol control unit 512 of the primary station. To issue.

  Next, the network layer protocol control unit 512 of the primary station receives the disconnection confirmation command reception notification 1 and sends the disconnection confirmation command reception notification 2 (LM_disc_conf2) including the data contained in the disconnection confirmation command reception notification 1 to the higher order of the primary station. Issued to the layer control unit 511.

  According to this series of disconnection sequences, the station control (Station control) between the primary station and the secondary station can be skipped (omitted) and terminated, and packets communicated between devices can be transmitted with DISC commands. Since there are two UA responses, the communication efficiency can be improved compared to the conventional case.

Here, each signal is expressed by an expression using the expression in FIG.
Disconnection request command 1: LM_disc_req1 (AAA, Data1)
Disconnection request command 2: LAP_disc_req2 (BBB, Data1)
Disconnection request command reception notification 1: LAP_disc_ind1 (CCC, Data1)
Disconnection request command reception notification 2: LM_disc_ind2 (DDD, Data1)
Disconnect confirmation command 1: LM_disc_rsp1 (EEE, Data2)
Disconnection confirmation command 2: LAP_disc_rsp2 (FFF, Data2)
Disconnection confirmation command reception notification 1: LAP_disc_conf1 (GGG, Data2)
Disconnection confirmation command reception notification 2: LM_disc_conf2 (HHH Data2)
It becomes.

  Since the DISC command and the UA response are handled as packet formats transmitted from the LAP layer, they are not expressed in equations, and are omitted because they are not the gist of the present invention. AAA to HHH are parameters necessary for each signal. Data1 is contained in the signal of the rightward arrow shown in FIG. 2, and Data2 is contained in the signal of the leftward arrow shown in FIG.

  In the conventional IrLMP layer disconnection, when the disconnection request command is issued to the IrLMP layer after the upper layer disconnection process is completed in the primary station, the IrLMP layer of the primary station transmits data to the IrLAP layer. A transfer request (data is an IrLMP layer disconnection request command) is transmitted. Upon receipt of this, the IrLMP layer of the secondary station enters the disconnected state when receiving the disconnect request command. At this time, a disconnection response is not transmitted. Then, after transmitting the aforementioned IrLMP layer disconnection request command, the primary station notifies the IrLAP layer of the disconnection request command, and disconnection processing in the IrLAP layer is performed.

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIGS.

  The signal sequence diagram of this embodiment is shown in FIG. 6 and the block diagram is shown in FIG. 5, but the present invention is not limited to this. Further, although OBEX and TinyTP are shown as upper layers in FIG. 5, the present invention is not limited to this. Further, although the network layer protocol control unit is described as a single layer in FIG. 5, the equivalent functions may be integrated into the upper layer or the lower layer, and the network layer protocol control unit may not exist alone. Each module in FIG. 5 may be software or hardware as long as the function can be realized.

  As shown in FIG. 6, first, the upper layer control unit 511 of the primary station issues a connection request command 1 (LM_con_req1) containing data necessary for connection. At this time, information on whether the communication is one-way transfer or two-way transfer is also notified. In the present embodiment, it is assumed that one-way transfer is selected below.

  Upon receiving the connection request command 1, the network station protocol control unit 512 of the primary station sends a connection request command 2 (LAP_con_req2) containing data contained in the connection request command 1 to the IrLAP layer control unit 513. To the IrLAP layer control unit 513. At this time, the one-way communication selection from the upper layer is also notified. The IrLAP layer control unit 513 of the primary station receives the connection request command 2 and sends the SNRM command including the data contained in the connection request command 2 and the one-way communication selection information to the secondary station via the transmission unit 514. To send.

  When the network layer protocol control unit 512 of the primary station issues a connection request command to the LAP layer control unit 513, the connection processing is completed, and when the data transfer request command is received from the upper layer control unit 511, A data transfer request command is issued to the IrLAP layer control unit 513 of the layer.

  On the other hand, the IrLAP layer control unit 513 of the secondary station that has received the SNRM command including the above-described one-way communication selection information in the reception unit 515 is included in the SNRM command with respect to the network layer protocol control unit 512 of the secondary station. A connection request command reception notification 1 (LAP_con_ind1) including data and one-way communication selection information is issued. The network layer protocol control unit 512 of the secondary station sends the connection request reception notification 2 (LM_con_ind2) including the data contained in the connection request command reception notification 1 and the one-way communication selection information to the upper layer control unit 511 of the secondary station. ).

  Upon receiving this connection request reception notification 2, the upper layer control unit 511 of the secondary station establishes a connection with the primary station in this state. The network layer protocol control unit 512 of the secondary station completes the connection processing when issuing a connection request command reception notification to the upper layer control unit 511, and sends a data transfer request command reception notification from the lower layer LAP layer control unit 513. When received, a data transfer request command reception notification is issued to the upper layer control unit 511.

  According to this series of connection sequences, connection work in one-way communication can be completed, and packets communicated between devices become one of the SNRM commands, improving communication efficiency compared to the conventional case. it can.

Here, each signal is expressed by an expression using the expression in FIG.
Connection request command 1: LM_con_req1 (AAA, Data1)
Connection request command 2: LAP_con_req2 (BBB, Data1)
Connection request command reception notification 1: LAP_con_ind1 (CCC, Data1)
Connection request command reception notification 2: LM_con_ind2 (DDD, Data1)
It becomes.

  Since the SNRM command is handled as a packet format transmitted from the LAP layer, it is not represented by an equation and is omitted because it is not the gist of the present invention. AAA to DDD are parameters necessary for each signal. Data1 is contained in the signal of the right-pointing arrow shown in FIG.

[Embodiment 4]
The following will describe still another embodiment of the present invention with reference to FIGS.

  The signal sequence diagram of the present embodiment is shown in FIG. 7 and the block diagram is shown in FIG. 5, but the present invention is not limited to this. Further, although OBEX and TinyTP are shown as upper layers in FIG. 5, the present invention is not limited to this. Further, although the network layer protocol control unit is described as a single layer in FIG. 5, the equivalent functions may be integrated into the upper layer or the lower layer, and the network layer protocol control unit may not exist alone. Each module in FIG. 5 may be software or hardware as long as the function can be realized. In the present embodiment, it is assumed that a connection in one-way communication has already been established between the primary station and the secondary station.

  As shown in FIG. 7, at the time of disconnection, first, an upper layer control unit 511 of the primary station issues a disconnect request command 1 (LM_disc_req1) containing data necessary for disconnection. Upon receipt of the disconnection request command 1, the primary station network layer protocol control unit 512 receives the disconnection request command 2 (LAP_disc_req2) in which the data contained in the disconnection request command 1 is input to the IrLAP layer control unit 513 of the primary station. Issue. The IrLAP layer control unit 513 of the primary station receives the disconnection request command 2 and transmits a DISC command including the data contained in the disconnection request command 2 to the secondary station via the transmission unit 514. When the network layer protocol control unit 512 of the primary station issues a disconnection request command to the LAP layer control unit 513, the disconnection process is completed.

  On the other hand, the IrLAP layer control unit 513 of the secondary station that has received the above-mentioned DISC command by the reception unit 515 sends a disconnect request command including data contained in the DISC command to the network layer protocol control unit 512 of the secondary station. A reception notification 1 (LAP_disc_ind1) is issued. The network layer protocol control unit 512 of the secondary station issues a disconnection request command reception notification 2 (LM_disc_ind2) including the data contained in the disconnection request command reception notification 1 to the upper layer control unit 511 of the secondary station. . The upper layer control unit 511 of the secondary station that has received this disconnection request command reception notification 2 is in a disconnected state. Also, the network layer protocol control unit 512 of the secondary station completes the disconnection process when it issues a disconnection request command reception notification to the upper layer control unit 511.

  According to this series of disconnection sequences, even during one-way communication, the disconnection operation can be terminated by skipping (excluding) each station management (Station control) between the primary station and the secondary station. Since a packet communicated between devices becomes one DISC command, the communication efficiency can be improved as compared with the conventional case.

Here, when each signal is expressed by an expression using the expression in FIG.
Disconnection request command 1: LM_disc_req1 (AAA, Data1)
Disconnection request command 2: LAP_disc_req2 (BBB, Data1)
Disconnection request command reception notification 1: LAP_disc_ind1 (CCC, Data1)
Disconnection request command reception notification 2: LM_disc_ind2 (DDD, Data1)
It becomes.

  Since the DISC command is handled as a packet format transmitted from the LAP layer, it is not represented by an equation, and is omitted because it is not the gist of the present invention. AAA to DDD are parameters necessary for each signal. Data1 is contained in the signal of the arrow pointing to the right shown in FIG.

[Embodiment 5]
The following will describe still another embodiment of the present invention with reference to FIG.

  In this embodiment, an example of communication between mobile phones will be described. In addition, although the mobile phone is used for the transmitter and the receiver, either the transmitter or the receiver may be a mobile phone, and data transmission or reception can be performed by the sequence described in the first to fourth embodiments. If possible, the opposite device may not be a mobile phone.

  In FIG. 8, data in the mobile phone A is transmitted to the mobile phone B using infrared rays. When the mobile phone B receives the data transmitted from the mobile phone A, the mobile phone B stores the received data in a memory in the mobile phone B or a connected external memory. The aforementioned data is text data, image data, voice data, telephone directory data, system information, and the like, and is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone.

  With the above-described connection sequence, for example, at the time of bidirectional communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the IrLAP layer control unit 513 along with the connection request command, and the IrLAP layer When receiving a connection confirmation command reception notification from the control unit 513, the data to the upper layer can be combined and passed to the upper layer control unit 511. On the other hand, on the receiving side (cell phone B), when the network layer protocol control unit 512 notifies the connection request command from the IrLAP layer control unit 513, the upper layer data is also passed to the upper layer control unit 511, At the time of connection confirmation command notification from the layer control unit 511, the upper layer data is also passed to the IrLAP layer control unit 513 to complete the connection.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  Further, at the time of one-way communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the lower layer together with a connection request, and on the reception side (cell phone B), the network layer When the protocol control unit 512 notifies the IrLAP layer control unit 513 that the connection confirmation command has been received, the upper layer data can be passed to the upper layer control unit 511 together. On the other hand, on the receiving side (cell phone B), when the connection request command is received from the IrLAP layer 513, the upper layer data is combined and passed to the upper layer control unit 511, and the connection is completed.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  As described above, compared to conventional IrDA communication, it is possible to shorten the time that the device must be directed to the opposite station, thereby improving user convenience and reducing the probability of error occurrence. There is expected. In addition, data transfer by infrared communication in one-way communication is also possible.

[Embodiment 6]
The following will describe still another embodiment of the present invention with reference to FIG.

  In this embodiment, an example of communication between a mobile phone and a display device will be described. Note that although a mobile phone is used as the transmitter, the transmitting device may not be a mobile phone as long as data transmission is possible by the sequence described in the first to fourth embodiments. Further, the display device may be the transmission side.

  In FIG. 9, data in the mobile phone A is transmitted to the display device B (TV, monitor, etc.) using infrared rays. In the display device B, appropriate processing is performed on the data transmitted from the mobile phone A. For example, in the case of image data, display is performed by decompressing the compressed data if necessary. Not limited to this. The above-mentioned data is text data, image data, voice data, phone book data, system information, etc., and is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone.

  With the above-described connection sequence, for example, at the time of bidirectional communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the IrLAP layer control unit 513 along with the connection request command, and the IrLAP layer When receiving a connection confirmation command reception from the control unit 513, the upper layer data can be combined and passed to the upper layer control unit 511. On the other hand, on the receiving side (display device B), when the network layer protocol control unit 512 notifies the reception of the connection request command from the IrLAP layer control unit 513, the upper layer data is also passed to the upper layer control unit 511, At the time of connection confirmation command notification from the layer control unit 511, the upper layer data is also passed to the IrLAP layer control unit 513 to complete the connection.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  At the time of one-way communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the lower layer together with a connection request, and on the reception side (display device B), the network layer When the protocol control unit 512 notifies the IrLAP layer control unit 513 that the connection confirmation command has been received, the upper layer data can be passed to the upper layer control unit 511 together. On the other hand, on the reception side (display device B), when the connection request command is received from the IrLAP layer 513, the upper layer data is combined and passed to the upper layer control unit 511 to complete the connection.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  As described above, compared to conventional IrDA communication, it is possible to shorten the time that the device must be directed to the opposite station, thereby improving user convenience and reducing the probability of error occurrence. There is expected. In addition, data transfer by infrared communication in one-way communication is also possible.

[Embodiment 7]
The following will describe still another embodiment of the present invention with reference to FIG.

  In this embodiment, an example of communication between a mobile phone and a printing apparatus will be described. Note that although a mobile phone is used as the transmitter, the transmitting device may not be a mobile phone as long as data transmission is possible by the sequence described in the first to fourth embodiments. Further, the printing apparatus may be the transmission side.

  In FIG. 10, data in the mobile phone A is transmitted to the printing apparatus B using infrared rays. The printing apparatus B performs appropriate processing on the data transmitted from the mobile phone A. For example, in the case of image data, printing is performed by decompressing the compressed data if necessary. Not limited to this. The above-mentioned data is text data, image data, phone book data, system information, etc., and is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone.

  With the above-described connection sequence, for example, at the time of bidirectional communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the IrLAP layer control unit 513 along with the connection request command, and the IrLAP layer When receiving a connection confirmation command reception from the control unit 513, the upper layer data can be combined and passed to the upper layer control unit 511. On the other hand, on the receiving side (printing apparatus B), when the network layer protocol control unit 512 notifies the connection request command reception from the IrLAP layer control unit 513, it also passes the upper layer data together to the upper layer control unit 511, When the connection confirmation command is notified from the layer, the upper layer data is also transferred to the IrLAP layer control unit 513 to complete the connection.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  During one-way communication, on the transmitting side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the lower layer together with a connection request, and on the receiving side (printing apparatus B), the network layer When the protocol control unit 512 notifies the IrLAP layer control unit 513 that the connection confirmation command has been received, the upper layer data can be passed to the upper layer control unit 511 together. On the other hand, on the reception side (printing apparatus B), when the connection request command is received from the IrLAP layer control unit 513, the upper layer data is passed to the upper layer control unit 511 and the connection is completed.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  As described above, compared to conventional IrDA communication, it is possible to shorten the time that the device must be directed to the opposite station, thereby improving user convenience and reducing the probability of error occurrence. There is expected. In addition, data transfer by infrared communication in one-way communication is also possible.

[Embodiment 8]
The following will describe still another embodiment of the present invention with reference to FIG.

  In this embodiment, an example of communication between a mobile phone and a recording device will be described. Note that although a mobile phone is used as the transmitter, the transmitting device may not be a mobile phone as long as data transmission is possible by the sequence described in the first to fourth embodiments. Further, the recording device may be the transmission side.

  In FIG. 11, data in the mobile phone A is transmitted to the recording device B using infrared rays. In the recording device B, appropriate processing is performed on the data transmitted from the mobile phone A. For example, in the case of image data, recording is performed in the internal memory of the recording device or the external memory connected to the recording device. The memory in the recording apparatus may be any medium that can record temporarily or semipermanently, such as a volatile memory such as SDRAM, a non-volatile memory such as flash memory, a recordable DVD, or an HDD drive. The above-mentioned data is text data, image data, voice data, phone book data, system information, etc., and is not limited to a specific format. The data in the mobile phone A may be either data in the internal memory of the mobile phone A or data in an external memory (nonvolatile memory such as an SD card) connected to the mobile phone.

  With the above-described connection sequence, for example, at the time of bidirectional communication, on the transmission side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the IrLAP layer control unit 513 along with the connection request command. When receiving a connection confirmation command reception from the control unit 513, the upper layer data can be combined and passed to the upper layer control unit 511. On the other hand, on the reception side (recording apparatus B), when the network layer protocol control unit 512 notifies the connection request command reception from the IrLAP layer 513, the upper layer data is also passed to the upper layer control unit 511 to control the upper layer control. When the connection confirmation command is notified from the unit 511, the upper layer data is also passed to the IrLAP layer control unit 513 to complete the connection.

  As a result, it is possible to establish a connection by exchanging one packet, and it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  Further, at the time of one-way communication, on the transmitting side (cell phone A), the network layer protocol control unit 512 passes the upper layer data to the lower layer together with a connection request, and on the receiving side (recording apparatus B), the network layer When the protocol control unit 512 notifies the IrLAP layer control unit 513 that the connection confirmation command has been received, the upper layer data can be passed to the upper layer control unit 511 together. On the other hand, on the receiving side (recording apparatus B), when the connection request command is received from the IrLAP layer control unit 513, the upper layer data is passed to the upper layer control unit 511 and the connection is completed. Connection can be established by packet switching.

  As a result, it is possible to complete the connection in a shorter time as compared with the connection method using a plurality of packets in the conventional IrDA.

  As described above, compared to conventional IrDA communication, it is possible to shorten the time that the device must be directed to the opposite station, thereby improving user convenience and reducing the probability of error occurrence. There is expected.

[Embodiment 9]
The following will describe still another embodiment of the present invention with reference to FIGS. Note that the communication protocol described in this embodiment is applied to the first to eighth embodiments. Therefore, the terms defined in Embodiments 1 to 8 are used in accordance with the definitions in this embodiment unless otherwise specified.

(1) Communication Layer FIG. 13 is a schematic diagram showing the correspondence between the OSI 7 hierarchical model, the IrDA hierarchy, and the communication system hierarchy according to the present invention.

  Each communication layer of the communication system according to the present embodiment also has a function equivalent to the corresponding layer of the OSI 7 layer model. However, as shown in FIG. 13, the communication system has a six-layer structure in which the session layer and the presentation layer are combined into one.

  In this embodiment, for convenience of explanation, explanation will be made based on IrSimple which is an application example of the present invention. However, the present invention is not limited to IrSimple. Note that IrSimple is a partial improvement of conventional IrDA.

  In the present embodiment, the data link layer, the network layer, the transport layer, and the session layer + presentation layer may be expressed as LAP, LAMP, SMP, and OBEX, respectively, in accordance with IrSimple. When the communication layer is distinguished between the transmitter and the receiver, “P” is added to the transmitter (primary station) and “S” is added to the receiver (secondary station). For example, “LAP (P)” means the data link layer of the transmitter.

(2) Sequence between transmitter and receiver (2-1) Connection sequence [A] Response is present FIG. 14A is a sequence diagram showing a connection sequence of the present embodiment (response is present). FIG. 14C is an explanatory diagram showing the data structure of communication data in the connection sequence of the present embodiment (response is sent).

  In the present embodiment (with a response), the SNRM command can have the same function as the search by using a global address for the Destination Device Address of SNRM (SNRM command in FIG. 14C).

  Further, in this embodiment (with a response), it is necessary for connection of higher layers such as a network layer, a transport layer, a session layer, and a presentation layer in the SNRM command and UA response which are connection packets of the data link layer. Insert parameters and commands. Thereby, it is possible to condense the connection packets for connecting the upper layers necessary for the conventional IrDA into one packet.

  Therefore, the search and connection sequence, which conventionally required a plurality of packets, can be performed with one packet pair.

[B] No Response FIG. 14B is a sequence diagram showing a connection sequence according to the present embodiment (no response). FIG. 14C is an explanatory diagram showing the data structure of communication data in the connection sequence of the present embodiment (no response is sent). In the present embodiment (no response), the UA response (UA response for SNRM in FIG. 14C) is not necessary.

  Depending on the user or application and the data type, a communication method in which the response from the receiver is omitted can be selected. In this case, as shown in FIG. 14B, it can be assumed that the search and connection are completed only by the SNRM command.

  As described above, the connection sequence of the present embodiment shortens the time required for connection by collecting connection requests of a plurality of communication layers, so that reconnection is easy even when the communication path is disconnected. . Therefore, it is particularly suitable for wireless communication using infrared rays, for example, where the communication path is easily cut. However, it is also effective in IEEE802.11 wireless, other wireless communication including Bluetooth, and wired communication.

  In this embodiment, an example in which all communication layers are connected by one communication will be described. However, the present invention is not limited to this. For example, after one communication layer is connected, the remaining plurality of communication layers may be connected. In addition, connection of one communication layer may be performed by a plurality of communications. For example, if the network layer connection requires two communications, the data link layer connection and the network layer first connection are combined into one connection request, and the network layer second connection and the transport layer connection. May be combined into one connection request.

(2-2) Data Exchange Sequence [A] Response Available FIGS. 15A and 15B are sequence diagrams showing the data exchange sequence of the present embodiment (response is sent). FIG. 15A is an explanatory diagram showing a data structure of communication data in the data exchange sequence according to the present embodiment (response is sent).

  In the present embodiment (with a response), the response of the lower layer and the upper layer for each piece of data is reduced as much as possible, and whether or not there is an error after transmitting a lot of data is returned.

  At the time of data communication, the transmitter uses a packet constructed by a sequential packet number and a flag for asking whether there is a problem with received data, and divided data obtained by dividing the data according to the packet size.

  As shown in FIG. 15A, the transmitter transmits a packet with the flag turned on after transmitting a predetermined number of packets. On the other hand, if the receiver receives a packet from the beginning of the previous data or the above flag is turned on and sends back a reply, if it does not detect an error, it sends a message that it has been received normally. Notify the machine. In addition, if the receiver detects an error from the beginning of the previous data or after receiving the packet with the flag turned on and sending a reply, the receiver after the packet that could not be received The divided data portion is ignored, only the flag is checked, and if the flag is on, the packet number that could not be received due to an error is notified to the transmitter.

  Further, when the transmitter receives a normal reception from the receiver, the transmitter transmits from the next packet. Further, when the transmitter receives a notification that there is an error, the transmitter retransmits from the packet number that could not be received to the packet with the flag turned on.

  Thereby, it is possible to pack between the packets, and efficient communication is possible.

  As shown in FIG. 15A, a UI frame (FIG. 16B) is used in the present embodiment (response is sent). For this reason, the data link layer (LAP layer) cannot recognize missing packets and detects them in the transport layer.

  A sequential number, a data confirmation flag, a flag indicating whether the data is the last packet, and a flag indicating whether the received data is normal are provided in the data portion of the transport layer of the UI frame, and data transmission is performed using these flags.

[B] No Response FIGS. 17A and 17B are sequence diagrams showing a data exchange sequence according to the present embodiment (no response). FIG. 17B is an explanatory diagram showing a data structure of communication data in the data exchange sequence according to the present embodiment (no response is sent).

  In the present embodiment (no response), only the data integrity is confirmed when the receiver response is not required. Therefore, the transmitter assigns a sequence number to the packet and transmits all data continuously.

  Then, the receiver only checks whether or not there is an error. When receiving normally, after receiving all the data, the receiver recognizes normal reception in the receiver and performs the following operation. The next operation in this case is, for example, displaying, printing, or saving the received data. On the other hand, when an error is detected, the receiver recognizes that it has not received normally in the receiver and performs the following operation. The next operation in this case is an indicator for notifying the user of the failure or a state of waiting for the next reception.

  Note that the UI frame (FIG. 16B) shown in FIG. 17B is also used in this embodiment (no response).

(2-3) Disconnection sequence [A] Response present FIG. 18A is a sequence diagram showing the disconnection sequence of the present embodiment (response is present). FIG. 18C is an explanatory diagram showing the data structure of communication data in the disconnection sequence of the present embodiment (response is sent).

  As shown in FIG. 18C, in the present embodiment (with a response), parameters and commands necessary for disconnecting upper layers such as a network layer, a transport layer, a session layer, a presentation layer, etc. are represented by a DISC command and a UA. Inserted into the response.

  Thereby, the disconnection sequence which conventionally required a plurality of packets can be performed with one packet pair.

[B] No Response FIG. 18B is a sequence diagram showing a disconnection sequence according to the present embodiment (no response). FIG. 18C is an explanatory diagram showing the data structure of communication data in the disconnection sequence of the present embodiment (response is sent). In the present embodiment (no response), the UA response (UA response in FIG. 18C) is not necessary.

  As shown in FIG. 18B, in the present embodiment (no response is received), when connection is made assuming that no response from the receiver is required, it can be assumed that the search and disconnection are completed with only the DISC command.

(3) Sequence in Transmitter and Receiver In FIGS. 19 to 35, for convenience of explanation, the data link layer is denoted as LAP, the network layer is denoted as LAMP, the transport layer is denoted as TTP or SMP, and the session layer and the presentation layer are denoted as OBEX. . In order to distinguish the communication layer between the transmitter and the receiver, “P” is added to the transmitter and “S” is added to the receiver. For example, “LAP (P)” means the data link layer of the transmitter.

(3-1) Connection sequence [A] Response present FIG. 19 is a sequence diagram showing a connection sequence according to the present embodiment (response is present). FIGS. 20A and 20B are explanatory diagrams showing the data structure of communication data in the connection sequence of the present embodiment (response is sent).

  As shown in FIG. 19, in the present embodiment (with a response), both the transmitter and the receiver prepare for connection. Thereafter, the transmitter passes the request of the upper layer as it is to the lower layer and transmits it as one packet (SNRM). On the other hand, the receiver receives the SNRM packet and notifies that it has been connected to the upper layer as it is, and then passes the response of OBEX (S) as it is to the lower layer and transmits it as one packet (UA). To do. The transmitter completes the connection upon receipt of the UA, and sends a notification (Connect.confirm) to the upper layer.

  The sequence in the transmitter and receiver at this time is as follows.

  First, each communication layer of the transmitter will be described.

  OBEX (P) promptly inserts a connection request command into the lower layer (SMP (P)) and generates a connection request function (Primitive) when a connection request is received from an application. When OBEX (P) receives a connection confirmation function from SMP (P), OBEX (P) confirms the response of the OBEX connection from the data, and if the response indicates no problem (Success), the connection is completed. .

  The SMP (P) receives the connection request function from the OBEX (P), and immediately adds the parameters necessary for communication with the SMP (S) of the receiver to the data of the connection request function of the OBEX (P). Thus, a connection request function is generated for the lower layer (LMP (P)). Further, when the SMP (P) receives the connection confirmation function from the LMP (P), the SMP (S) extracts the parameter generated by the SMP (S) of the receiver from the function data, confirms the value, and the SMP (S) End the negotiation. The SMP (P) transmits data obtained by removing the SMP (S) parameter from the data of the connection confirmation function to the OBEX (P) as a connection confirmation function.

  The LMP (P) receives the connection request function from the SMP (P), and immediately adds the parameters necessary for communication with the LMP (S) of the receiver to the data of the connection request function of the SMP (P). Thus, a connection request function is generated for the lower layer (LAP (P)). When the LMP (P) receives the connection confirmation function from the LAP (P), the LMP (P) extracts the parameter generated by the LMP (S) of the receiver from the function data, confirms the value, and the LMP (S) End the negotiation. Further, the LMP (P) transmits data obtained by removing the LMP (S) parameter from the data of the connection confirmation function as a connection confirmation function.

  Normally, an LSAP (Link Service Access Point) is defined to manage logical ports. When one connection is made one to one, there is no need to use LMP. In this case, a connectionless value is used as a fixed value for LSAP. This eliminates the need for LMP connection parameter exchange.

  Upon receipt of the connection request function from the LMP (P), the LAP (P) immediately adds a parameter necessary for communication with the LAP (S) of the receiver to the data of the connection request function of the LMP (P). And outputs an SNRM command to the physical layer of the receiver. Further, when the LAP (P) receives a UA response from the physical layer of the receiver, the LAP (P) extracts the parameter generated by the LAP (S) of the receiver from the data of the UA response, confirms the value, and determines the LAP (S). The negotiation with is terminated. The LAP (P) transmits data obtained by removing the LAP (S) parameter from the UA response data to the LMP (P) as a connection confirmation function.

  Next, each communication layer of the receiver will be described.

  OBEX (S) receives a connection request function from the application and enters a reception standby state. When OBEX (S) receives the connection notification function (Indication) from the lower layer (SMP (S)), it confirms the OBEX connection command from the data, and if there is no problem, connects the response Success. A response function (Response) is output to SMP (S) to complete the connection.

  In response to the connection request function from OBEX (S), SMP (S) enters a reception standby state. When the SMP (S) receives a connection notification function from the lower layer (SMP (S)), the SMP (S) extracts the parameter generated by the SMP (P) of the transmitter from the function data and returns a response to it. A parameter is created, a connection request function including data obtained by removing the SMP (P) parameter from the function data is issued to OBEX (S), and then a connection response function from OBEX (S) is waited for. Further, when the SMP (S) receives the connection response function from the OBEX (S), the SMP (S) adds the response parameter to the data of the connection response function of the OBEX (S) to the LMP (S), and A connection response function is generated for the LMP (S), and the SMP layer negotiation is terminated.

  The LMP (S) receives a connection request function from the SMP (S) and enters a reception standby state. Also, when the LMP (S) receives a connection notification function from the lower layer (LAP (S)), it extracts the parameter generated by the LMP (P) of the transmitter from the function data and returns a response to it A parameter is created, a connection request function including data obtained by removing the LMP (P) parameter from the function data is issued to SMP (S), and then a connection response function from SMP (S) is waited for. Further, when the LMP (S) receives the connection response function from the SMP (S), the LMP (S) adds the response parameter to the data of the connection response function of the SMP (S) to the LAP (S), and A connection response function is generated for LAP (S), and the negotiation of the LMP layer is terminated.

  Normally, an LSAP (Link Service Access Point) is defined to manage logical ports. When one connection is made one to one, there is no need to use LMP. In this case, a connectionless value is used as a fixed value for LSAP. This eliminates the need for LMP connection parameter exchange.

  In response to the connection request function from the LMP (S), the LAP (S) enters a reception standby state. In addition, when the LAP (S) receives an SNRM command from the physical layer, the LAP (S) extracts the parameter generated by the transmitter LAP (P) from the SNRM command data, and extracts the LAP (P) parameter from the SNRM command data. After issuing the connection request function including the excluded data to the LMP (S), a response parameter is generated for the connection request function, and the connection response function from the LMP (S) is awaited. Further, when the LAP (S) receives the connection response function from the LMP (S), the LAP (S) adds the response parameter to the data of the connection response function of the LMP (S) and sends a UA response to the physical layer. Is output and the LAP layer negotiation is terminated.

[B] No Response FIG. 21 is a sequence diagram showing a connection sequence of the present embodiment (no response). FIG. 20A is an explanatory diagram showing the data structure of communication data in the connection sequence of the present embodiment (no response is sent).

  As shown in FIG. 21, in this embodiment (no response), both the transmitter and the receiver prepare for connection. Thereafter, the transmitter passes the request of the upper layer as it is to the lower layer and transmits it as one packet (SNRM). And a transmitter raises notification (Connect.confirm) from LAP (P) to an upper layer as connection completion at the time of transmitting a SNRM packet. On the other hand, the receiver receives the SNRM packet, notifies the upper layer as it is, and completes the connection when notifying OBEX (S).

  The sequence in the transmitter and receiver at this time is as follows.

  First, each communication layer of the transmitter will be described.

  OBEX (P) promptly inserts a connection request command into the lower layer (SMP (P)) and generates a connection request function (Primitive) when a connection request is received from an application. OBEX (P) completes connection when it receives a connection confirmation function from SMP (P).

  The SMP (P) receives the connection request function from the OBEX (P), and immediately adds the parameters necessary for communication with the SMP (S) of the receiver to the data of the connection request function of the OBEX (P). Thus, a connection request function is generated for the lower layer (LMP (P)). Further, when the SMP (P) receives the connection confirmation function from the LMP (P), the SMP (P) terminates the SMP layer negotiation, assuming that the transmitted parameters can be negotiated. At this time, the SMP (P) transmits a connection confirmation function to the OBEX (P).

  The LMP (P) receives the connection request function from the SMP (P), and immediately adds the parameters necessary for communication with the LMP (S) of the receiver to the data of the connection request function of the SMP (P). Thus, a connection request function is generated for the lower layer (LAP (P)). In addition, when the LMP (P) receives the connection confirmation function from the LAP (P), the LMP (P) terminates the negotiation of the LMP layer, assuming that the transmitted parameters can be negotiated. At this time, the LMP (P) transmits a connection confirmation function to the SMP (P).

  Normally, an LSAP (Link Service Access Point) is defined to manage logical ports. When one connection is made one to one, there is no need to use LMP. In this case, a connectionless value is used as a fixed value for LSAP. This eliminates the need for LMP connection parameter exchange.

  Upon receipt of the connection request function from the LMP (P), the LAP (P) immediately adds a parameter necessary for communication with the LAP (S) of the receiver to the data of the connection request function of the LMP (P). And outputs an SNRM command to the physical layer of the receiver. Also, LAP (P) ends negotiation of the LAP layer, assuming that negotiation with the transmitted parameters has been completed at the time when the SNRM command is output. At this time, LAP (P) transmits a connection confirmation function to LMP (P).

  Next, each communication layer of the receiver will be described.

  OBEX (S) receives a connection request function from the application and enters a reception standby state. When OBEX (S) receives the connection notification function (Indication) from the lower layer (SMP (S)), it confirms the OBEX connection command from the data, and if there is no problem, the connection is completed. .

  In response to the connection request function from OBEX (S), SMP (S) enters a reception standby state. Further, when the SMP (S) receives the connection notification function from the lower layer (SMP (S)), the SMP (S) extracts the parameter generated by the SMP (P) of the transmitter from the function data and uses the parameter. Complete the negotiation. Then, SMP (S) issues to OBEX (S) a connection request function including data obtained by removing the SMP (P) parameter from the function data.

  The LMP (S) receives a connection request function from the SMP (S) and enters a reception standby state. Also, when the LMP (S) receives the connection notification function from the lower layer (LAP (S)), it extracts the parameter generated by the LMP (P) of the transmitter from the function data and uses that parameter. Complete the negotiation. Then, the LMP (S) issues a connection request function including the data obtained by removing the LMP (P) parameter from the function data to the SMP (S).

  Normally, an LSAP (Link Service Access Point) is defined to manage logical ports. When one connection is made one to one, there is no need to use LMP. In this case, a connectionless value is used as a fixed value for LSAP. This eliminates the need for LMP connection parameter exchange.

  In response to the connection request function from the LMP (S), the LAP (S) enters a reception standby state. Further, when the LAP (S) receives an SNRM command from the physical layer, the LAP (S) extracts the parameter generated by the LAP (P) of the transmitter from the data of the SNRM command, and completes the negotiation using the parameter. Then, the LAP (S) issues a connection request function including the data obtained by removing the LAP (P) parameter from the function data to the LMP (S).

(3-2) Data Exchange Sequence [A] With Response FIG. 22 is a sequence diagram showing a data exchange sequence according to the present embodiment (with a response). FIG. 23 is an explanatory diagram showing the data structure of communication data in the data exchange sequence of the present embodiment (response is sent).

  As shown in FIG. 22, in this embodiment (response is present), the transmitter generates a PUT command, which is transmitted to the lower layer, and is output as a UI frame (FIG. 16B).

  On the other hand, the receiver receives the data and sends a notification to the upper layer. At this time, the SMP (S) notifies the upper layer OBEX (S) that data continues (status = truncated).

  After transmitting a certain number of packets, the transmitter turns on a flag for confirming whether the data has arrived properly and transmits the packets. In response, in the receiver, the SMP (S) notifies the transmitter of whether or not there was an error, and if so, the number where the error occurred.

  If there is no error, the transmitter outputs the next packet group, and if there is an error, the transmitter retransmits packets after the packet having the error.

  When the end of data is reached, the transmitter turns on a flag indicating the end of data and transmits the data. On the other hand, if this flag is ON, the receiver notifies OBEX (S) that the data is ready (status = OK) and waits for a response to OBEX (S). . When an OBEX (S) response occurs, the data is transmitted to the lower layer and output as a UI frame.

  If the received response is Success, the transmitter ends normally.

  The sequence in the transmitter and receiver at this time is as follows.

  In the transmitter, OBEX (P) outputs a PUT command as a data transmission function to the lower layer. However, if OBEX (P) can be transmitted by SMP (P) without requiring a response to a PUT command other than the PUT Final (last PUT) command (Continue is returned if normal), The command is output. In the case of a command other than the PUT Final command or the PUT command, it waits for a data notification function from the lower layer, and terminates the command by looking at the response in the data.

  Here, the data transmission function is a function (Data Request) for requesting data transmission to a lower layer. The data notification function is a function (Data Indicate) for notifying that data has been received from a lower layer.

  In the receiver, OBEX (S) receives the data notification function from the lower layer and receives data. However, OBEX (S) does not return a response to a PUT command other than the PUT Final command, and returns a response as a data transmission function in the case of a command other than the PUT Final command or the PUT command.

  Here, headers and the like in the upper layer and lower layer data transmission functions and data notification functions common to the transmitter and the receiver will be described.

  When the SMP receives the data transmission function from the OBEX, when the size that can be transmitted by the LMP is smaller than the size of the data in the data transmission function, the SMP makes the data to a size that can be transmitted by the LMP. (B) When the size that can be transmitted by the LMP is larger than the size of the data in the data transmission function, several data are combined to create larger data that is equal to or smaller than the size that can be transmitted. The SMP is a sequential number, an argument for inquiring the data reception status of the other device, an argument indicating the end of the data, an argument indicating that the SMP of the other device requires an OBEX response, and whether the received data is normal. An SMP header including an argument indicating whether or not is created. Then, a data transmission function including the data added to the divided or combined data with the SMP header is issued to the LMP.

  Further, when the SMP receives the data notification function from the LMP, the SMP extracts the SMP header from the data in the function, and checks whether the sequence number is normal (that is, the sequence number comes in order without omission). If it is normal, a data notification function is issued to OBEX. At this time, the data notification function may be output for each data notification function from the lower layer, or data of the data notification functions from several lower layers may be output together.

  The SMP (P) of the transmitter converts the data transmission function from OBEX (P) into a data transmission function to LMP (P), and issues a data transmission function of a certain fixed amount of data. Thereafter, the SMP (P) sets the argument for inquiring the data reception state to the receiver to True, issues a data transmission function, and waits for the data notification function of the LMP (P).

  The SMP (P) analyzes the SMP header in the data notification function from the LMP (S), and if the argument indicating whether the received data is normal indicates that it has been received normally, Assuming that data is ready to be transmitted, the state is such that transmission to OBEX (P) is possible. That is, data from OBEX (P) can be received in this state.

  On the other hand, SMP (P) analyzed that the SMP header of the data notification function received from LMP (S) and analyzed that the argument indicating whether the received data was normal was not received normally. In the case shown, the data transmission function from which it was notified that the data could not be received normally to the data transmission function in which the argument for inquiring the data reception state to the other device is set to True is generated again. The SMP (P) repeats the re-occurrence until the data by all the data transmission functions are notified to the receiver or a certain specified number of times.

  Further, when the SMP (P) receives a data transmission function whose true data argument is True from OBEX (P), to the LMP (P) in which the last data of the data transmission function is entered. The data transmission function is issued with an argument indicating that this data transmission function is the end of the data or an argument indicating that a response of the OBEX (S) of the receiver is required as True.

  On the other hand, when the SMP (S) of the receiver receives the data notification function from the LMP (S), an argument indicating that a response of the end of the data or the OBEX (S) of the receiver is necessary is provided. If it is True, a data notification function is issued in which the data from which the SMP (S) header is removed is inserted into OBEX (S).

  Further, when the SMP (S) receives the data notification function from the LMP (S), the SMP (S) analyzes the SMP header from the data in the data notification function and confirms the sequential number. If the SMP (S) is able to receive normally until it receives a header for which the argument for inquiring the data reception state from the receiver is true, it indicates that the argument indicating whether the received data is normal has been received normally. An SMP header is created as shown, and a data transmission function is issued to the LMP (S) as data.

  On the other hand, when the SMP (S) detects that the signal has not been normally received, the SMP (S) stores the number of the SMP header that is predicted to have not been normally received. For example, when 0, 1, 2, 3, and 5 are received, and the fifth should be 4, but 4 is not received, the number predicted to have not been received normally is 4. Thereafter, the SMP (S) checks only whether the argument for inquiring the data reception state to the receiver of the SMP header is True, and stops the output of the data notification function to the OBEX (S).

  SMP (S) indicates that an argument indicating whether or not the received data was normal could not be normally received when receiving a data notification function in which the argument for inquiring the data reception state to the receiver is True Then, the SMP header in which the SMP header number that could not be normally received is inserted into the field for entering the sequential number is created, and the data transmission function is issued to the LMP (S) as data.

  Further, when the SMP (S) receives a data notification function in which an argument indicating the end of data or an argument indicating that the response of the OBEX (S) of the receiver is required is OBEX, OBEX After outputting the data notification function to (S), it waits for a data transmission request from OBEX (S).

  When the SMP (S) receives a data transmission request from the OBEX (S), the SMP (S) creates an SMP header indicating that the received data is normally received as an argument indicating whether or not the received data is normal. A data transmission function is issued to the LMP (S) in addition to the data transmission request data of S). If there is an error, the notification to OBEX (S) stops, so the wait is only normal.

  Next, when the LMP receives a data transmission request function from an upper layer, the LMP creates data by attaching an LMP header to the data in the function, and issues a data transmission request function containing the data in the LAP. When the LMP receives a data notification function from the LAP, the LMP creates data excluding the LMP header from the data in the function, and issues a data notification function containing the data in the SMP.

  Note that it is not necessary to use LMP when making one connection on a one-to-one basis. In this case, the LMP header contains an LSAP containing a connectionless value.

  When the LAP receives a data transmission request function from the LMP, the LAP creates data by attaching a LAP header to the data in the function, and issues a UI frame containing the data in the physical layer. When the LAP receives a data reception notification from the physical layer, the LAP creates data excluding the LAP header from the data of the UI frame, and issues a data notification function containing the data in the LMP. In the present embodiment, the LAP header includes a connection address and a UI indicator.

[B] No Response FIG. 24 is a sequence diagram showing a data exchange sequence according to the present embodiment (no response). FIG. 23 is an explanatory diagram showing the data structure of communication data in the data exchange sequence of the present embodiment (no response is sent).

  As shown in FIG. 24, in the present embodiment (no response is received), the transmitter generates a PUT command, which is transmitted to the lower layer and output as a UI frame.

  On the other hand, the receiver receives the data and sends a notification to the upper layer. At this time, the SMP (S) notifies the upper layer OBEX (S) that data continues (status = truncated).

  Then, when the end of data is reached, the transmitter turns on a flag indicating the end of data and transmits the data. On the other hand, if this flag is ON, the receiver notifies OBEX (S) that the data is ready (status = OK), and ends the data exchange sequence.

  The sequence in the transmitter and receiver at this time is as follows.

  In the transmitter, OBEX (P) outputs a PUT command as a data transmission function to the lower layer. However, OBEX (P) can terminate a command without requiring a response to all commands. Then, OBEX (P) outputs the next command when transmission is possible with SMP (P).

  In the receiver, OBEX (S) receives the data notification function from the lower layer and receives only data without returning a response to all commands.

  Here, headers and the like in the upper layer and lower layer data transmission functions and data notification functions common to the transmitter and the receiver will be described.

  When the SMP receives the data transmission function from the OBEX, when the size that can be transmitted by the LMP is smaller than the size of the data in the data transmission function, the SMP makes the data to a size that can be transmitted by the LMP. (B) When the size that can be transmitted by the LMP is larger than the size of the data in the data transmission function, several data are combined to create larger data that is equal to or smaller than the size that can be transmitted. The SMP is a sequential number, an argument for inquiring the data reception status of the other device, an argument indicating the end of the data, an argument indicating that the SMP of the other device requires an OBEX response, and whether the received data is normal. An SMP header including an argument indicating whether or not is created. Then, a data transmission function including the data added to the divided or combined data with the SMP header is issued to the LMP.

  Further, when the SMP receives the data notification function from the LMP, the SMP extracts the SMP header from the data in the function, and checks whether the sequence number is normal (that is, the sequence number comes in order without omission). If it is normal, a data notification function is issued to OBEX. At this time, the data notification function may be output for each data notification function from the lower layer, or data of the data notification functions from several lower layers may be output together.

  The SMP (P) of the transmitter converts the data transmission function from OBEX (P) into a data transmission function to LMP (P). When receiving a data transmission function in which the argument that is the last of the data is False from OBEX (P), the data with the SMP header added to the data is issued to LMP (P). On the other hand, when the SMP (P) receives a data transmission function in which the argument that the end of the data is true is received from OBEX (P), the last data of the data transmission function is entered. A data transmission function to the LMP (P) is issued with an argument indicating that the data transmission function is the end of the data or an argument indicating that a response of the OBEX (S) of the receiver is required as True. .

  On the other hand, when receiving the data notification function from the lower layer, the SMP (S) of the receiver analyzes the SMP header from the data in the data notification function and confirms the sequential number. Then, when the SMP (S) analyzes the SMP header and confirms that the reception is successful, the SMP (S) issues a data transmission function to the LMP (S).

  On the other hand, when the SMP (S) detects that it has not been received normally, it notifies the OBEX (S) as an error. For example, when 0, 1, 2, 3, and 5 are received, the fifth should be 4, but not 4.

  Thereafter, the SMP (S) waits for the argument indicating the end of the data of the SMP header or the argument indicating that the response of the OBEX (S) of the receiver is True, and is True. Whether to receive a data notification function (note that even if it is received, OBEX (S) is not notified), a disconnection notification function is received, or data notification to OBEX (S) is not performed until a certain period of time elapses. .

  Next, when the LMP (P) of the transmitter receives a data transmission request function from the SMP (S), the LMP header is added to the data in the function to create data, and the data is stored in the LAP (P). The entered data transmission request function is issued.

  On the other hand, when the LMP (S) of the receiver receives the data notification function from the LAP (S), it creates data excluding the LMP header from the data in the function, and the data is stored in the SMP (S). Issue the data notification function.

  Note that it is not necessary to use LMP when making one connection on a one-to-one basis. In this case, the LMP header contains an LSAP containing a connectionless value.

  When the LAP (P) of the transmitter receives the data transmission request function from the LMP (P), the LAP header is added to the data in the function to create the data, and the UI frame containing the data in the physical layer is created. To emit.

  On the other hand, when receiving the data reception notification from the physical layer, the LAP (S) of the receiver creates data excluding the LAP header from the data of the UI frame, and the data enters the LMP (S). Issue data notification function. In the present embodiment, the LAP header includes a connection address and a UI indicator.

(3-3) Disconnection sequence [A] Response present FIG. 25 is a sequence diagram showing a disconnection sequence of the present embodiment (response is present). FIGS. 26A and 26B are explanatory diagrams showing the data structure of communication data in the disconnection sequence of the present embodiment (response is sent).

  As shown in FIG. 25, in this embodiment (with a response), a transmitter disconnect command is transmitted to the lower layer, and a DISC command is generated. The receiver receives the DISC command and notifies it to the upper layer, the response is returned, and a UA response is generated. Thereafter, the upper layer of the transmitter is notified that the UA response has been received, and the process ends.

  The sequence in the transmitter and receiver at this time is as follows.

  First, each communication layer of the transmitter will be described.

  When a disconnect request is received from an application, OBEX (P) promptly inserts a disconnect request command into the lower layer (SMP (P)) and generates a disconnect request function (Primitive). When OBEX (P) receives the disconnection confirmation function from SMP (P), it confirms the response of OBEX disconnection from the data, and if the response indicates no problem (Success), it completes disconnection. .

  The SMP (P) receives the disconnection request function from the OBEX (P), and immediately adds the parameters necessary for communication with the SMP (S) of the receiver to the data of the disconnection request function of the OBEX (P). Thus, a disconnection request function is generated for the lower layer (LMP (P)). In addition, when the SMP (P) receives the disconnection confirmation function from the LMP (P), the parameter generated by the SMP (S) of the receiver is extracted from the function data, the value is confirmed, and the SMP (S) The disconnection process is terminated. The SMP (P) transmits data obtained by removing the SMP (S) parameter from the data of the disconnection confirmation function to the OBEX (P) as a disconnection confirmation function. However, normally, there is no parameter newly added by SMP (P) at the time of disconnection.

  The LMP (P) receives the disconnection request function from the SMP (P), and immediately adds parameters necessary for communication with the LMP (S) of the receiver to the data of the disconnection request function of the SMP (P). Thus, a disconnection request function is generated for the lower layer (LAP (P)). In addition, when the LMP (P) receives a disconnection confirmation function from the LAP (P), the LMP (S) extracts a parameter generated by the LMP (S) of the receiver from the function data, confirms the value, and the LMP (S) The disconnection process is terminated. Further, the LMP (P) transmits data obtained by removing the LMP (S) parameter from the data of the disconnection confirmation function to the SMP (P) as a disconnection confirmation function. However, normally, there is no parameter newly added by LMP (P) at the time of disconnection.

  The LAP (P) receives the disconnection request function from the LMP (P), and immediately adds the parameters necessary for communication with the LAP (S) of the receiver to the data of the disconnection request function of the LMP (P). The DISC command is output to the physical layer of the receiver. Further, when the LAP (P) receives a UA response from the physical layer of the receiver, the LAP (P) extracts the parameter generated by the LAP (S) of the receiver from the data of the UA response, confirms the value, and determines the LAP (S). Terminate the connection with. The LAP (P) issues data obtained by removing the LAP (S) parameter from the UA response data to the LMP (P) as a disconnection confirmation function. However, normally, there is no parameter newly added with LAP (P) at the time of disconnection.

  Next, each communication layer of the receiver will be described.

  When OBEX (S) receives a disconnect notification function (Indication) from the lower layer (SMP (S)), it confirms the OBEX disconnect command from the data, and if there is no problem, a response of Success is received as a disconnect response function. (Response) is output to SMP (S), and the disconnection is completed.

  When the SMP (S) receives the disconnection notification function from the lower layer (SMP (S)), the SMP (S) extracts the parameter generated by the SMP (P) of the transmitter from the function data, and sets the parameter of the response to it. After creating and issuing a disconnection request function including data obtained by removing the SMP (P) parameter from the function data to OBEX (S), it waits for a disconnection response function from OBEX (S). Further, when the SMP (S) receives a disconnect response function from the OBEX (S), the SMP (S) adds the response parameter to the data of the disconnect response function of the OBEX (S) with respect to the LMP (S), A disconnection response function is generated for the LMP (S), and the SMP layer disconnection process is terminated. However, normally, there is no parameter newly added by SMP (S) at the time of cutting.

  When the LMP (S) receives the disconnection notification function from the lower layer (LAP (S)), the LMP (S) extracts the parameter generated by the LMP (P) of the transmitter from the function data, and sets the parameter of the response to it. After creating and issuing a disconnect request function including data obtained by removing the LMP (P) parameter from the function data to SMP (S), a disconnect response function from SMP (S) is awaited. Further, when the LMP (S) receives the disconnection response function from the SMP (S), the LMP (S) adds the response parameter to the data of the disconnection response function of the SMP (S) to the LAP (S), A disconnect response function is generated for LAP (S), and the LMP layer disconnection process is terminated. However, normally, there is no parameter newly added by LMP (S) at the time of disconnection.

  When the LAP (S) receives a DISC command from the physical layer, the LAP (P) extracts the parameters generated by the transmitter LAP (P) from the DISC command data, and removes the LAP (P) parameters from the DISC command data. After issuing a disconnection request function including data to LMP (S), a parameter for a response to the function is created, and a disconnection response function from LMP (S) is awaited. Further, when the LAP (S) receives the disconnection response function from the LMP (S), the LAP (S) adds the response parameter to the data of the disconnection response function of the LMP (S) and sends a UA response to the physical layer. To terminate the LAP layer cutting process. However, normally, there is no parameter newly added by LAP (S) at the time of disconnection.

[B] No response FIG. 27 is a sequence diagram showing a disconnection sequence according to the present embodiment (no response). FIG. 26A is an explanatory diagram showing the data structure of communication data in the disconnection sequence of the present embodiment (no response is sent).

  As shown in FIG. 27, in the present embodiment (no response), a transmitter disconnect command is transmitted to a lower layer, and a DISC command is generated. In the transmitter, the disconnection process ends at this point. On the other hand, the receiver receives the DISC command and transmits it to the upper layer, and when the notification is sent to the upper layer, the disconnection process ends.

  The sequence in the transmitter and receiver at this time is as follows.

  First, each communication layer of the transmitter will be described.

  When a disconnect request is received from an application, OBEX (P) promptly inserts a disconnect request command into the lower layer (SMP (P)) and generates a disconnect request function (Primitive). OBEX (P) completes the disconnection when it receives a disconnection confirmation function from SMP (P).

  The SMP (P) receives the disconnection request function from the OBEX (P), and immediately adds the parameters necessary for communication with the SMP (S) of the receiver to the data of the disconnection request function of the OBEX (P). Thus, a disconnection request function is generated for the lower layer (LMP (P)). Further, when the SMP (P) receives the disconnection confirmation function from the LMP (P), it is determined that the SMP (P) has been disconnected with the transmitted parameters, and ends the SMP layer disconnection process. Further, SMP (P) transmits a disconnection confirmation function to OBEX (P). However, normally, there is no parameter newly added by SMP (P) at the time of disconnection.

  The LMP (P) receives the disconnection request function from the SMP (P), and immediately adds parameters necessary for communication with the LMP (S) of the receiver to the data of the disconnection request function of the SMP (P). Thus, a disconnection request function is generated for the lower layer (LAP (P)). Further, when the LMP (P) receives the disconnection confirmation function from the LAP (P), it is determined that the LMP (P) has been disconnected with the transmitted parameters, and ends the LMP layer disconnection process. In addition, LMP (P) transmits a disconnection confirmation function to SMP (P). However, normally, there is no parameter newly added by LMP (P) at the time of disconnection.

  The LAP (P) receives the disconnection request function from the LMP (P), and immediately adds the parameters necessary for communication with the LAP (S) of the receiver to the data of the disconnection request function of the LMP (P). The DISC command is output to the physical layer of the receiver. Further, LAP (P) terminates the LAP layer disconnection process on the assumption that it has been disconnected with the transmitted parameters when it outputs the DISC command. LAP (P) issues a disconnection confirmation function to LMP (P). However, normally, there is no parameter newly added with LAP (P) at the time of disconnection.

  Next, each communication layer of the receiver will be described.

  When OBEX (S) receives a disconnect notification function (Indication) from the lower layer (SMP (S)), it confirms the OBEX disconnect command from the data, and if there is no problem, it completes disconnection.

  When the SMP (S) receives the disconnect notification function from the lower layer (SMP (S)), the SMP (S) extracts the parameter generated by the SMP (P) of the transmitter from the function data, and uses that parameter to disconnect. Complete. SMP (S) issues a disconnect request function to OBEX (S), in which data obtained by removing the SMP (P) parameter from the function data is input. However, normally, there is no parameter newly added by SMP (S) at the time of cutting.

  When the LMP (S) receives a disconnect notification function from the lower layer (LAP (S)), the LMP (S) extracts the parameter generated by the LMP (P) of the transmitter from the function data, and uses that parameter to disconnect Complete. Also, the LMP (S) issues a disconnect request function to the SMP (S) in which data obtained by removing the LMP (P) parameter from the function data is input. However, normally, there is no parameter newly added by LMP (S) at the time of disconnection.

  When the LAP (S) receives a DISC command from the physical layer, the LAP (S) extracts the parameter generated by the LAP (P) of the transmitter from the data of the DISC command, and completes the disconnection using the parameter. Also, LAP (S) issues a disconnect request function including data obtained by removing the parameter of LAP (P) from the data of the DISC command to LMP (S). However, normally, there is no parameter newly added by LAP (S) at the time of disconnection.

(4) Switching of response presence / absence The flow of data and parameters between the communication layers of the transmitter and the receiver will be described with reference to FIGS.

  In the present embodiment, each communication layer LAP, LMP, SMP, OBEX of the transmitter and the receiver has a connection request function, a connection notification function, a connection response function, and a connection confirmation function. These functions are functions for accessing the LAP layer from the upper layer (that is, the LMP layer).

  The function can specify Data (hereinafter referred to as data) and Requested-Qos or Returned-QoS as arguments. The data is set in each communication layer as described above.

  On the other hand, Qos notifies the specification of negotiation parameters such as the baud rate determined by the LAP and the negotiation result to higher layers including OBEX. Qos is also used in conventional IrDA.

  For example, when a transmitter application or OBEX (P) issues a QoS including a parameter indicating that a response is necessary / unnecessary, the QoS is sequentially transmitted to the lower layer up to LAP (P). Then, LAP (P) reflects the QoS value as the value of the negotiation parameter (Ack Less Connect) and transmits it to the receiver.

  As a result, the communication layers of the transmitter and the receiver operate according to the application of the transmitter or the specification of response necessity / unnecessity by OBEX (P), so that bidirectional / one-way connection is possible.

  FIGS. 28 to 32 are explanatory diagrams showing the flow of data and parameters between communication layers in the connection sequence (FIG. 19) of the present embodiment (response is sent). Note that the parameters of QoS between OBEX and SMP, between SMP and LMP, and between LMP and LAP may be the same or different. Therefore, in the figure, -a, -b, and -c are added for distinction.

  In the transmitter, as shown in FIG. 28, the data to be transmitted to the receiver and the data of QoS-1 (QoS requested by the transmitter) are transmitted from the upper layer to the lower layer by con.req (data) (FIG. 19). To pass.

  On the other hand, as shown in FIG. 29, the receiver passes only the data of QoS-2 (QoS requested by the receiver) from the upper layer to the lower layer by con.req.

  Thereafter, when the LAP (S) receives the SNRM command, the receiver compares the QoS-1 of the transmitter with the QoS-2 of the own device, and creates QoS-3 as a commonly negotiated parameter. And as shown in FIG. 30, LAP (S) notifies QoS-3 to a higher layer by con.ind (data) with the data from a transmitter. Each upper layer stores this QoS-3 and holds it as a connection parameter at the time of connection.

  Subsequently, the receiver does not need QoS when notifying con.resp (data). Therefore, as shown in FIG. 31, only data is passed from the upper layer to the lower layer in con.resp (data). When LAP (S) receives con.resp (data), QoS-3 is added to the UA response and a UA response is issued.

  Subsequently, in the transmitter, LAP (P) receives the UA response and stores QoS-3 as a negotiated parameter. Then, as shown in FIG. 32, LAP (P) notifies QoS-3 to the upper layer together with the receiver data by con.conf (data). Each communication layer holds this QoS-3 as a connection parameter in the established connection.

  In this embodiment, for example, Requested-QoS: Baud-Rate + Max-Turn-Around-Time + Disconnect-Threshold + DataSize + Ack less connection + Min-Packet-Interval is used as the QoS of con.req. . In addition, Result-QoS: Baud-Rate + Disconnect-Threshold + DataSize + Ack less connection (indication primitive only) is used as the QoS of Con.ind and con.conf.

  In the connection sequence (FIG. 21) of the present embodiment (no response), the flow of data and parameters between the communication layers is as follows.

  In the transmitter, as shown in FIG. 28, the data to be transmitted to the receiver and the data of QoS-1 (QoS requested by the transmitter) are transmitted from the upper layer to the lower layer by con.req (data) (FIG. 21). To pass.

  Then, the LAP (P) of the transmitter stores QoS-1 as it is as QoS-3. Then, LAP (P) notifies QoS-3 to the upper layer by con.conf as shown in FIG. Each communication layer holds this QoS-3 as a connection parameter in the established connection.

  On the other hand, as shown in FIG. 29, the receiver passes only the data of QoS-2 (QoS requested by the receiver) from the upper layer to the lower layer by con.req.

  After that, at the time when the LAP (S) receives the SNRM command, the receiver sets the QoS-1 of the transmitter to QoS-3. In addition, if the parameters of QoS-2 are not satisfied by the combination with QoS-1, it cannot be received.

  Subsequently, as shown in FIG. 30, LAP (S) notifies QoS-3 to the upper layer together with data from the transmitter by con.ind (data). Each upper layer stores this QoS-3 and holds it as a connection parameter at the time of connection.

  Thereby, the presence / absence of a response can be switched by the application operating the above QoS-1 and QoS-2 on the upper layer (application).

  Here, as a criterion for switching between presence / absence of response, the file format of the file to be transmitted, application, user selection, and the like can be considered.

  Specifically, when the file format is used as a reference, for example, in the case of a multimedia-related file, both with and without a response can be selected, and the data is received in files such as a phone book, mail, schedule, etc. If there is a need to confirm, response presence may be automatically selected. Further, when the application is used as a reference, for example, in the case of a slide show, no response may be automatically selected. Further, in the case of selection by the user, for example, the user may be allowed to select from a menu display with / without response.

  FIGS. 33 to 35 are explanatory diagrams showing modifications of data and parameter flows between communication layers in the connection sequence of the present embodiment.

  When the information of all communication layers is included in the first SNRM command in the transmitter (FIG. 19), data and parameters are not relayed and transmitted in each communication layer (FIG. 28), but as shown in FIG. The communication layer can be directly passed to the LAP layer.

  Conversely, as shown in FIG. 34, the receiver may be configured to take out all data and parameters included in the SNRM command and pass them directly from the LAP layer to each communication layer as the destination.

  Further, as shown in FIG. 35, in the transmitter, data and parameters of OBEX (P), SMP (P), and LMP (P) are integrated by LMP (P), and further, the above integration is performed by LAP (P). It is also possible to configure such that an SNRM command is generated by adding a parameter of LAP (P) to the data and parameters that have been processed.

  The communication device of the present invention has a network layer protocol control unit, and when performing communication connection, the network layer protocol control unit issues a connection request command to the lower layer when receiving a connection request command from the upper layer. When the connection confirmation command reception notification is received from the lower layer, the data transfer request command is not issued to the lower layer, but the connection confirmation command reception notification is issued to the upper layer, and when the connection request command is received from the upper layer, the upper layer The user request data is sent to the lower layer and the connection request command is sent to the lower layer. When the connection confirmation command reception notification is received from the lower layer, the user data in the connection confirmation command reception notification is sent to the upper layer. When a connection request command reception notification is received from the lower layer, a data transfer request command is sent to the lower layer. A connection request command reception notification is issued to the upper layer without issuing a connection request. When a connection confirmation command is received from the upper layer, a connection confirmation command is issued to the lower layer, and a connection request command reception notification is received from the lower layer. User data in the confirmation command reception notification is sent to the upper layer and a connection confirmation command reception notification is issued. When a connection confirmation command is received from the upper layer, the user data from the upper layer is issued to the lower layer. You may comprise so that it may pass with.

  According to the above sequence, since connection processing can be completed by exchanging a set of packets at the time of connection, communication efficiency can be improved.

  In addition, the communication device of the present invention has a network layer protocol control unit, and when a communication connection is made, if the one-way communication selection is notified from the upper layer, the network layer protocol control unit is connected from the upper layer. When a request command is received, a connection request command is issued to the lower layer to complete the connection process, and when a connection request command is received from the upper layer, user data from the upper layer is issued to the lower layer. If a one-way communication selection is notified when a connection request command reception notification is received from the lower layer, a connection request command reception notification is issued to the upper layer and a connection request command reception notification is received from the lower layer The user data in the connection request command reception notification may be configured to issue a connection confirmation command reception notification to the upper layer.

  According to the above sequence, even when one-way communication is selected, since the connection process can be completed with one packet transmission at the time of connection, communication efficiency can be improved.

  Further, when the communication device of the present invention performs communication disconnection in a state where the connection with the opposite station is established by one-way communication, the network layer protocol control unit receives the disconnection request command from the upper layer. When a disconnect request command is issued without issuing a data transfer request command to the lower layer, and a disconnect request command is received from the upper layer, user data from the upper layer is issued to the lower layer and passed to the lower layer. When receiving a disconnection request command reception notification from the lower layer, it issues a disconnection request command reception notification to the upper layer, and when receiving a disconnection request command reception notification from the lower layer, the user data in the disconnection confirmation command reception notification is sent to the upper layer The disconnection confirmation command reception notification may be issued.

  By doing so, the disconnection process can be completed by exchanging a set of packets at the time of disconnection, so that the communication efficiency can be improved.

  For example, according to the above sequence, at the time of connection, the time required for connection of the LMP layer is included in the connection time of the LAP layer, which is approximately several tens to several hundreds of ms (depending on the device) compared to the conventional IrDA. There is an effect that the time can be shortened. In addition, even when cutting, the time required to cut the LMP layer is included in the cutting time of the LAP layer, so the cutting time is shortened by several tens to several hundreds of ms (depending on the device) compared to conventional IrDA. There is an effect that can be done.

  By the way, in the conventional IrDA system, one-to-many bidirectional communication is possible. In this one-to-many bidirectional communication, the lower level connection status is managed by station management, and the logical connection is managed by LSAP. As an example of another protocol, when it is connected to a network drive in the IP protocol, it is confirmed that there is a device with an IP address (that the station management is doing) It is logically recognized as a drive (what LSAP is doing).

  In the network layer protocol of the present invention, one-to-one bidirectional communication or one-to-one or one-to-many one-way communication (in this embodiment, for example, “a primary station particularly requires a reply from a secondary station. In the case of a configuration premised on “when not,” communication efficiency can be improved by interposing station management, omitting exchanges.

  According to the network layer protocol of the present invention, one-to-many bidirectional communication performed by the conventional IrDA method cannot be performed by executing each procedure, but in the case of one-to-one bidirectional communication, the communication medium is optical. Because it is possible to communicate only in line of sight, and because the light has a narrow directivity angle, and the communication distance is ˜several meters, the communication partner can be specified by the user. There is no problem (one-to-many communication is rarely performed even with conventional IrDA, and most are one-to-one communication). Further, in the case of one-way communication, there is not much concept of connection in the first place (refer to the image of the remote controller), so station management can be omitted. Bidirectional here means that some packets are exchanged with each other, but does not mean that objects such as files are exchanged with each other.

  The network layer protocol of the present invention can be suitably applied to the field of spatial communication using light, particularly to a communication system and communication equipment using an IrDA infrared communication system.

  Next, each block of the communication device 50 (FIG. 5), particularly the network layer protocol control unit 512, may be configured by hardware logic (communication circuit), or realized by software using a CPU as follows. May be.

  That is, the communication device 50 includes a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, a RAM (random access memory) that expands the program, A storage device (recording medium) such as a memory for storing the program and various data is provided. The object of the present invention is to record the program code (execution format program, intermediate code program, source program) of the control program (communication program) of the communication device 50, which is software that realizes the above-described functions, in a computer-readable manner. This can also be achieved by supplying the recording medium to the communication device 50 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  The communication device 50 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  As described above, the communication device according to the present invention has a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. When a communication device as a primary station performs communication connection with a secondary station, when a connection request command is received from an upper layer in the network layer, the connection request command is issued to the lower layer. A network layer protocol control unit that issues a connection confirmation command reception notification to the upper layer without issuing a data transfer request command to the lower layer when receiving a connection confirmation command reception notification from the network.

  The communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. A communication method in a communication device as a station, and when a communication connection with a secondary station is performed, when a connection request command is received from an upper layer in the network layer, a connection request command is issued to the lower layer, and the lower layer When receiving a connection confirmation command reception notification from the network, a data transfer request command is not issued to the lower layer, but a connection confirmation command reception notification is issued to the upper layer.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and a secondary that communicates with a primary station. A communication device as a station that receives a connection request command without issuing a data transfer request command to the lower layer when receiving a connection request command reception notification from the lower layer when making a communication connection with the primary station A network layer protocol control unit that issues a notification to the upper layer and issues a connection confirmation command to the lower layer when receiving a connection confirmation command from the upper layer is provided.

  In addition, the communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a primary station. A communication method in a communication device as a station, and when a communication connection with a primary station is made, when a connection request command reception notification is received from the lower layer, a data transfer request command is not issued to the lower layer A request command reception notification is issued to the upper layer, and when a connection confirmation command is received from the upper layer, a connection confirmation command is issued to the lower layer.

  The communication system according to the present invention includes the communication device as the primary station and the communication device as the secondary station.

  According to the above configuration and method, when the primary station performs communication connection with the secondary station, the network station issues a connection request command to the lower layer when receiving a connection request command from the upper layer in the network layer, When a connection confirmation command reception notification is received from the lower layer, a connection confirmation command reception notification is issued to the upper layer without issuing a data transfer request command to the lower layer. On the other hand, when the secondary station establishes communication connection with the primary station, when it receives a connection request command reception notification from the lower layer, it does not issue a data transfer request command to the lower layer and sends a connection request command reception notification. When the connection confirmation command is received from the upper layer, the connection confirmation command is issued to the lower layer.

  Therefore, according to the above connection sequence, it is not necessary to perform communication for connecting the network layer after the lower layer is connected. Therefore, since the sequence at the time of connection is simplified, the communication efficiency can be improved.

  Furthermore, in the communication device according to the present invention, the network layer protocol control unit issues a connection request command to the lower layer when receiving a connection request command from the upper layer when performing communication connection with the secondary station. The user data included in the connection request command from the upper layer is preferably passed to the lower layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit receives the connection confirmation command reception notification from the lower layer when performing communication connection with the secondary station, It is preferable that user data included in the connection confirmation command reception notification from the lower layer is passed to the upper layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit receives the connection request command reception notification from the lower layer when performing communication connection with the primary station, It is preferable that user data included in the request command reception notification from the lower layer is passed to the upper layer.

  Further, in the communication device according to the present invention, the network layer protocol control unit issues a connection confirmation command to the lower layer when receiving a connection confirmation command from the upper layer when performing communication connection with the primary station. The user data included in the connection confirmation command from the upper layer is preferably passed to the lower layer.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. When a communication device as a station is disconnected from a secondary station and receives a disconnection request command from an upper layer in the network layer, the disconnection request is not issued to the lower layer without issuing a data transfer request command. A network layer protocol control unit for issuing a disconnection confirmation command reception notification to an upper layer when a command is issued and a disconnection confirmation command reception notification is received from the lower layer is provided.

  The communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a secondary station. In a communication method in a communication device as a station, when a communication disconnection with a secondary station is performed, when a disconnection request command is received from an upper layer in the network layer, a data transfer request command is issued to the lower layer When a disconnection request command is issued and a disconnection confirmation command reception notification is received from the lower layer, a disconnection confirmation command reception notification is issued to the upper layer.

  The communication device according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and a secondary that communicates with a primary station. When a communication device as a station disconnects from the primary station, when it receives a disconnect request command reception notification from the lower layer, it issues a disconnect request command reception notification to the upper layer and confirms disconnection from the upper layer A network layer protocol control unit that issues a disconnection confirmation command to a lower layer when receiving a command is provided.

  In addition, the communication method according to the present invention includes a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer, and communicates with a primary station. A communication method in a communication device as a station, and when disconnecting communication with a primary station, when receiving a disconnection request command reception notification from a lower layer, a disconnection request command reception notification is issued to an upper layer, When a disconnection confirmation command is received from, a disconnection confirmation command is issued to the lower layer.

  The communication system according to the present invention includes the communication device as the primary station and the communication device as the secondary station.

  According to the above configuration and method, when the primary station disconnects communication with the secondary station, when receiving a disconnection request command from the upper layer in the network layer, the data transfer request command to the lower layer When a disconnection request command is issued without issuing a disconnection confirmation command reception notification from the lower layer, a disconnection confirmation command reception notification is issued to the upper layer. On the other hand, when the secondary station disconnects communication with the primary station, when it receives a disconnection request command reception notification from the lower layer, it issues a disconnection request command reception notification to the upper layer and sends a disconnection confirmation command from the upper layer. When received, issue a disconnect confirmation command to the lower layer.

  Therefore, according to the above-described disconnection sequence, it is not necessary to perform communication for disconnecting the network layer before disconnecting the lower layer. Accordingly, since the sequence at the time of disconnection is simplified, the communication efficiency can be improved.

  Furthermore, in the communication device according to the present invention, the network layer protocol control unit issues a disconnection request command to the lower layer when receiving a disconnection request command from the upper layer when disconnecting communication with the secondary station. The user data included in the disconnection request command from the upper layer is preferably passed to the lower layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit disconnects communication with the secondary station, when the disconnection command reception notification is received from the lower layer, the disconnection command reception notification is It is preferable that user data included in the disconnection confirmation command reception notification from the lower layer is passed to the upper layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit disconnects communication with the primary station, when receiving the disconnection request command reception notification from the lower layer, It is preferable that user data included in the disconnection request command reception notification from the lower layer is passed to the upper layer.

  Furthermore, in the communication device according to the present invention, the network layer protocol control unit issues a disconnection confirmation command to the lower layer when receiving a disconnection confirmation command from the upper layer when disconnecting communication with the primary station. The user data included in the disconnection confirmation command from the upper layer is preferably passed to the lower layer.

  Furthermore, in the communication device according to the present invention, when the network layer protocol control unit receives a connection request command in one-way communication from the upper layer when performing communication connection with the secondary station, After the connection request command is issued, the data transfer request command is issued to the lower layer in response to the data transfer request command from the upper layer without the connection confirmation command from the lower layer.

  Furthermore, in the communication device according to the present invention, when the network layer protocol control unit establishes communication connection with the primary station, a connection request command reception notification from the lower layer and the primary station request unidirectional transfer. After receiving the connection request reception notification command to the upper layer, if the data reception notification is received from the lower layer without receiving the connection confirmation command from the upper layer, the upper layer receives the data. It is characterized by issuing a notification.

  According to the above configuration, the primary station issues a connection request command to the lower layer when receiving a connection request command for one-way communication from the upper layer when performing communication connection with the secondary station. Thereafter, the data transfer request command is issued to the lower layer in response to the data transfer request command from the upper layer without the connection confirmation command from the lower layer. On the other hand, when the secondary station establishes communication connection with the primary station, if it receives a connection request command reception notification from the lower layer and a notification that the primary station requests one-way transfer, After receiving the connection request reception notification command, if the data reception notification is received from the lower layer without receiving the connection confirmation command from the upper layer, the data reception notification is issued to the upper layer.

  Therefore, according to the connection sequence described above, since the connection can be completed without a response from the secondary station to the primary station, it is possible to perform connection and data transfer in one-way communication.

  Furthermore, in the communication device according to the present invention, the network layer protocol control unit issues a connection request command to the lower layer when receiving a connection request command from the upper layer when performing communication connection with the secondary station. The user data included in the connection request command from the upper layer is preferably passed to the lower layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit receives the connection request command reception notification from the lower layer when performing communication connection with the primary station, Preferably, user data included in the connection request command reception notification from the lower layer is passed to the upper layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit disconnects the one-way communication with the secondary station, when the disconnection request command is received from the upper layer, the data transfer to the lower layer is performed. A disconnect request command is issued without issuing a request command, and the disconnection process is completed without receiving a disconnection confirmation command reception notification from a lower layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit disconnects the one-way communication with the primary station, when the disconnection request command reception notification is received from the lower layer, the disconnection request is issued to the upper layer. A command reception notification is issued, and the disconnection process is completed without receiving a disconnection confirmation command from an upper layer.

  According to the above configuration, when disconnecting the one-way communication with the secondary station, the primary station disconnects without issuing a data transfer request command to the lower layer when receiving a disconnection request command from the upper layer. A request command is issued, and the disconnection processing is completed without receiving a disconnection confirmation command reception notification from the lower layer. On the other hand, when disconnecting the one-way communication with the primary station, the secondary station issues a disconnection request command reception notification to the upper layer when receiving a disconnection request command reception notification from the lower layer, and disconnects from the upper layer. The disconnection process is completed without receiving a confirmation command.

  Therefore, according to the above-described disconnection sequence, disconnection can be completed without a response from the secondary station to the primary station. Therefore, it is possible to perform disconnection by one-way communication.

  Further, in the communication device according to the present invention, the network layer protocol control unit issues a disconnection request command when receiving a disconnection request command from an upper layer when disconnecting the one-way communication with the secondary station. It is preferable to pass user data included in the disconnection request command from the upper layer to the lower layer.

  Further, in the communication device according to the present invention, when the network layer protocol control unit disconnects the one-way communication with the primary station, when receiving the disconnection request command reception notification from the lower layer, the disconnection request command reception notification Is preferably sent to the upper layer, and user data included in the disconnection request command reception notification from the lower layer is passed to the upper layer.

  Furthermore, the communication device according to the present invention is characterized in that the network layer protocol control unit conforms to IrLMP (Infrared Link Management Protocol).

  The communication device may be realized by a computer. In this case, a communication program for the communication device that causes the communication device to be realized by the computer by operating the computer as the network layer protocol control unit, and A computer-readable recording medium on which is recorded also falls within the scope of the present invention.

  The communication device may be realized by a communication circuit that functions as the network layer protocol control unit.

  The communication device is suitable for a mobile phone that performs communication using the communication device.

  The communication device is suitable for a display device that displays data based on data received by the communication device.

  Further, the communication device is suitable for a printing apparatus that performs printing based on data received by the communication device.

  The communication device is suitable for a recording device that records data received by the communication device.

  Finally, the communication device of the present invention may be configured as follows.

(1.1 Primary station: LM_CONNECT.request → LAP_CONNECT.request, LAP_CONNECT.confirm → LM_CONNECT.confirm)
The communication device [1] of the present invention has a network layer protocol control unit inside, and in a communication device used for optical space transmission using an LED or LD as a light source, when performing communication connection with an opposite device, When the network layer protocol control unit receives a connection request command from the upper layer, it issues a connection request command to the lower layer, and when it receives a connection confirmation command reception notification from the lower layer, it sends a data transfer request command to the lower layer. It may be configured to issue a connection confirmation command reception notification to an upper layer without issuing a message.

(2.2 Next station: LAP_CONNCT.indication → LM_CONNECT.indication, LM_CONNECT.response → LAP_CONNECT.response)
The communication device [2] of the present invention has a network layer protocol control unit therein, and in the communication device used for optical space transmission using an LED or LD as a light source, when performing communication connection with the opposite device, When the network layer protocol control unit receives a connection request command reception notification from the lower layer, the network layer protocol control unit issues a connection request command reception notification to the upper layer without issuing a data transfer request command to the lower layer. It may be configured to issue a connection confirmation command to the lower layer when receiving the request.

(3. Put upper layer data in LM_CONNECT.request of primary station on LAP_CONNECT.request)
When the communication device [3] of the present invention performs communication connection with the opposite device in the communication device [1], the network layer protocol control unit receives the connection request command from the upper layer. The user data may be configured to issue a connection request command and pass it to the lower layer.

(4. Put the upper layer data of LAP_CONNECT.confirm of the primary station on LM_CONNECT.confirm)
When the communication device [4] of the present invention performs communication connection with the opposite device in the communication device [1], the network layer protocol control unit receives the connection confirmation command reception notification from the lower layer. The user data in the confirmation command reception notification may be configured to issue and pass a connection confirmation command reception notification to the upper layer.

(5. Put upper layer data in LAP_CONNECT.indicaiton of secondary station in LM_CONNECT.indication)
When the communication device [5] of the present invention performs communication connection with the opposite device in the communication device [2], the network layer protocol control unit requests when receiving a connection request command reception notification from the lower layer. The user data in the command reception notification may be configured to issue and pass a connection request command reception notification to the upper layer.

(6.2. Put the upper layer data in LAP_CONNECT.response of the secondary station on LAP_CONNECT.resoponse)
When the communication device [6] of the present invention performs communication connection with the opposite device in the communication device [2], the network layer protocol control unit receives the connection confirmation command from the upper layer. May be configured to issue a connection confirmation command and pass it to the lower layer.

(7.1 Primary station LM_DISCONNECT.request → LAP_DISCONNECT.request, LAP_DISCONNECT.indication → LM_DISCONNECT.indication)
The communication device [7] of the present invention has a network layer protocol control unit therein, and in the communication device used for optical space transmission using an LED or LD as a light source, when disconnecting communication with the opposite device, When the network layer protocol control unit receives a disconnection request command from the upper layer, it issues a disconnection request command without issuing a data transfer request command to the lower layer, and when it receives a disconnection confirmation command reception notification from the lower layer It may be configured to issue a disconnection confirmation command reception notification to an upper layer.

(8.2 Secondary station LAP_DISCONNECT.indication → LM_DISCONNECT.indication, LM_DISCONNECT.request → LAP_DISCONNECT.request)
The communication device [8] of the present invention has a network layer protocol control unit therein, and in communication device used for optical space transmission using an LED or LD as a light source, when disconnecting communication with the opposite device, When the network layer protocol control unit receives a disconnection request command reception notification from the lower layer, it issues a disconnection request command reception notification to the upper layer, and when it receives a disconnection confirmation command from the upper layer, it confirms the disconnection to the lower layer It may be configured to issue a command.

(9.1 Put the upper layer data in LM_DISCONNECT.request of the primary station on LAP_DISCONNECT.request)
When the communication device [9] of the present invention disconnects communication with the opposite device in the communication device [7], the network layer protocol control unit receives the disconnection request command from the upper layer. May be configured to issue a disconnection request command to the lower layer and pass it to the lower layer.

(10.1 Place the upper layer data in LAP_DISCONNECT.indication of the primary station in LM_DISCONNECT.indication)
When the communication device [10] of the present invention disconnects communication with the opposite device in the communication device [7], the network layer protocol control unit disconnects when receiving a disconnection confirmation command reception notification from the lower layer. The user data in the confirmation command reception notification may be configured to issue and pass a disconnection confirmation command reception notification to the upper layer.

(11.2 Place the upper layer data in LAP_DISCONNECT.indication of the next station in LM_DISCONNECT.indication)
When the communication device [11] of the present invention disconnects communication with the opposite device in the communication device [8], the network layer protocol control unit disconnects when receiving a disconnection request command reception notification from the lower layer. The user data in the confirmation command reception notification may be configured to issue and pass a disconnection confirmation command reception notification to the upper layer.

(12.2 Place the upper layer data in LM_DISCONNECT.request of the secondary station on LAP_DISCONNECT.request)
When the communication device [12] of the present invention disconnects communication with the opposite device in the communication device [8], the network layer protocol control unit receives the disconnection confirmation command from the upper layer. May be configured to issue a disconnection confirmation command and pass it to the lower layer.

(13. When the primary station performs one-way transfer, without LAP_CONNECT.confirm, LM_DATA.request → LAP_DATA.request)
When the communication device [13] of the present invention performs communication connection with the opposite device in the communication device [1], the network layer protocol control unit receives a connection request command for one-way communication from the upper layer. In this case, after issuing the connection request command to the lower layer, the data transfer request command is issued to the lower layer in response to the data transfer request command from the upper layer without the connection confirmation command from the lower layer. It may be configured.

(14. When the primary station performs one-way transfer, the upper layer data in LM_CONNECt.request is placed in LAP_CONNECT.request)
When the communication device [14] of the present invention performs communication connection with the opposite device in the communication device [13], the network layer protocol control unit receives the connection request command from the upper layer. The user data may be configured to issue a connection request command and pass it to the lower layer.

(15. When the secondary station performs one-way transfer, LAP_DATA.indicatio → LM_DATA.indication without LM_CONNECT.response)
When the communication device [15] of the present invention performs communication connection with the opposite device in the communication device [2], the network layer protocol control unit receives the connection request command reception notification from the lower layer. In addition, when receiving a notification from the lower layer that the opposite station is requesting one-way transfer, after issuing a connection request reception notification command to the upper layer, without receiving a connection confirmation command from the upper layer, When the data reception notification is received from the lower layer, the data reception notification may be issued to the upper layer.

(16. When the secondary station performs one-way transfer, the upper layer data in LAP_CONNECT.indication is put in LM_CONNECT.indication)
When the communication device [16] of the present invention performs communication connection with the opposite device in the communication device [15], the network layer protocol control unit receives the connection request command reception notification from the lower layer. The user data in the connection request command reception notification may be configured to issue and pass the connection request command reception notification to the upper layer.

(17. Disconnection of primary station during one-way transfer)
When the communication device [17] of the present invention disconnects communication with the opposite device in the communication device [7], when the connection with the opposite station is established, the network layer protocol control is performed. When receiving a disconnection request command from the upper layer, the unit issues a disconnection request command without issuing a data transfer request command to the lower layer, and completes the disconnection process without receiving a disconnection confirmation command reception notification from the lower layer It may be configured as follows.

(18. Disconnection of secondary station during one-way transfer)
In the communication device [18] of the present invention, in the communication device [8], when the connection in the one-way communication is established with the opposite station, the network layer protocol control is performed when the communication with the opposite device is disconnected. The unit is configured to issue a disconnection request command reception notification to the upper layer when receiving a disconnection request command reception notification from the lower layer, and complete the disconnection process without receiving a disconnection confirmation command from the upper layer Good.

(19. Primary station during one-way transfer: Place upper layer data in LM_DISCONNCT.request on LAP_DISCONNECT.request)
When the communication device [19] of the present invention disconnects communication with the opposite device in the communication device [17], the network layer protocol control unit receives the disconnection request command from the upper layer. May be configured to issue a disconnection request command to the lower layer and pass it to the lower layer.

(20. Secondary station during one-way transfer: Upper layer data in LAP_DISCONNECT.indication is put in LM_DISCONNECT.indication)
When the communication device [20] of the present invention disconnects communication with the opposite device in the communication device [18], the network layer protocol control unit disconnects when receiving a disconnection request command reception notification from the lower layer. The user data in the confirmation command reception notification may be configured to issue and pass a disconnection confirmation command reception notification to the upper layer.

(21.IrLMP)
The communication device [20] of the present invention is any one of the communication devices [1 to 20], and in particular, the network layer protocol is IrLMP (Infrared Link Management Protocol).

(22. Communication system)
The communication system of the present invention uses any one of the communication devices [1 to 21].

(23. Communication circuit)
The communication circuit of the present invention realizes any one of the communication devices [1 to 21].

(24. Transmission / reception program)
The communication system of this invention implement | achieves any of the said communication apparatuses [1-21].

(25. Mobile phone)
The mobile phone of the present invention is equipped with any of the communication devices [1 to 21].

(26. Display device)
The display device of the present invention is equipped with any of the communication devices [1 to 21].

(27. Printing device)
The printing apparatus of the present invention is equipped with any of the communication devices [1 to 21].

(28. Recording device)
The recording apparatus of the present invention is equipped with any of the communication devices [1 to 21].

  Specific embodiments or examples made in the section of the detailed description of the invention are intended to clarify the technical contents of the present invention, and are limited to such specific examples and are interpreted in a narrow sense. The present invention should not be changed, and various modifications can be made within the scope of the spirit of the present invention and the following claims.

  INDUSTRIAL APPLICABILITY The present invention can shorten the time for connection and disconnection, can be widely applied to communication devices, and can be suitably used particularly for communication devices having an optical space communication function.

It is a signal sequence diagram for demonstrating one embodiment of this invention. It is a signal sequence diagram for demonstrating other embodiment of this invention. It is a signal sequence diagram for demonstrating the connection process to the IrLMP layer in the conventional IrDA. It is a signal sequence diagram for demonstrating the cutting | disconnection to the IrLMP layer in the conventional IrDA. It is a block diagram for demonstrating embodiment of this invention. It is a signal sequence diagram for demonstrating other embodiment of this invention. It is a signal sequence diagram for demonstrating other embodiment of this invention. It is a figure for demonstrating other embodiment of this invention. It is a figure for demonstrating other embodiment of this invention. It is a figure for demonstrating other embodiment of this invention. It is a figure for demonstrating other embodiment of this invention. It is a signal sequence diagram for demonstrating the connection and data transfer by the conventional IrDA. It is a schematic diagram which shows the correspondence of an OSI7 hierarchy model, the hierarchy of IrDA, and the hierarchy of this invention. (A) is a sequence diagram of the connection establishment which concerns on embodiment of this invention. (B) is a sequence diagram of connection establishment according to the embodiment of the present invention. (C) is a packet format for establishing a connection according to the embodiment of the present invention. (A) is a figure which shows the data exchange sequence which concerns on embodiment of this invention. (B) is a figure which shows the data exchange sequence which concerns on embodiment of this invention. (A) is a figure which shows the packet format used by the data exchange of IrDA. (B) is a figure which shows the packet format used by the data exchange of this invention. (A) is a figure which shows the data exchange sequence which concerns on embodiment of this invention. (B) is a figure which shows the data exchange sequence which concerns on embodiment of this invention. (A) is a figure which shows the cutting sequence which concerns on embodiment of this invention. (B) is a figure which shows the cutting | disconnection sequence which concerns on embodiment of this invention. (C) is a packet format of the disconnection sequence according to the embodiment of the present invention. It is a sequence diagram which shows the function (command, message) between each layer at the time of the connection sequence which concerns on embodiment of this invention, and the flow of a packet. (A) is explanatory drawing which shows the change of the data in the function between each layer of the right arrow in FIG. 19 and FIG. 21 at the time of the connection sequence which concerns on embodiment of this invention. (B) is a figure which shows the change of the data in the function between each layer which concerns on embodiment of this invention. It is a sequence diagram which shows the function (command, message) between each layer at the time of the connection sequence which concerns on embodiment of this invention, and the flow of a packet. It is a sequence diagram which shows the function (command, message) between each layer at the time of the data exchange which concerns on embodiment of this invention, and the flow of a packet. It is a figure which shows the change of the data in the function between each layer in FIG. 22 and FIG. 24 at the time of the data exchange which concerns on embodiment of this invention. It is a sequence diagram which shows the function (command, message) between each layer at the time of the data exchange which concerns on embodiment of this invention, and the flow of a packet. It is a sequence diagram which shows the function (command, message) between each layer at the time of the cutting | disconnection sequence which concerns on embodiment of this invention, and the flow of a packet. (A) is explanatory drawing which shows the change of the data in the function between each layer of the arrow pointing right in FIG. 25 and FIG. 27 at the time of the cutting | disconnection sequence which concerns on embodiment of this invention. (B) is explanatory drawing which shows the change of the data in the function between each layer which concerns on embodiment of this invention. It is a sequence diagram which shows the function (command, message) between each layer at the time of the cutting | disconnection sequence which concerns on embodiment of this invention, and the flow of a packet. It is a schematic diagram showing delivery of the connection request function data and connection parameters in the primary station according to the embodiment of the present invention. It is a schematic diagram showing delivery of the connection parameter of the connection request function in the secondary station which concerns on embodiment of this invention. It is a schematic diagram showing delivery of the data and connection parameter of the connection confirmation function in the primary station which concerns on embodiment of this invention, and the connection notification function in a secondary station. It is a schematic diagram showing delivery of the data of a connection response function in the secondary station which concerns on embodiment of this invention. It is a schematic diagram showing delivery of the connection parameter of the connection confirmation function in the primary station which concerns on embodiment of this invention. FIG. 10 is a schematic diagram showing connection request function data and connection parameter delivery in a primary station when connection parameters are shared between layers, which is a modification of the embodiment. FIG. 9 is a schematic diagram showing connection notification function data and connection parameter delivery in a secondary station when a connection parameter is shared between layers, which is a modification of the embodiment. FIG. 10 is a schematic diagram illustrating connection request function data and connection parameter delivery in a primary station when a connection parameter is separately passed to a lower layer, which is a modification of the embodiment.

Explanation of symbols

50 Communication device 511 Upper layer control unit (upper layer)
512 Network layer protocol control unit 513 IrLAP layer control unit (lower layer)

Claims (18)

A communication device as a primary station having a network layer, an upper layer that is a communication layer higher than the network layer, a lower layer that is a communication layer lower than the network layer, and communicating with a secondary station,
When performing communication connection with the secondary station, the network layer issues a connection request command to the lower layer when a connection request command is received from the upper layer, and the lower layer when a connection confirmation command reception notification is received from the lower layer. A network layer protocol control unit that issues a connection confirmation command reception notification to an upper layer without issuing a data transfer request command to the layer,
The communication device, wherein the network layer protocol control unit creates a logical channel with a predetermined fixed value when receiving the connection confirmation command reception notification. A communication device as a secondary station that has a network layer, an upper layer that is a communication layer higher than the network layer, a lower layer that is a communication layer lower than the network layer, and communicates with the primary station,
When communication connection with the primary station is performed, when a connection request command reception notification is received from the lower layer, a connection request command reception notification is issued to the upper layer without issuing a data transfer request command to the lower layer. A network layer protocol control unit that issues a connection confirmation command to the lower layer when receiving a connection confirmation command from
A communication device, wherein a value of a logical channel created by the primary station is preset in the network layer protocol control unit.   When performing communication connection with the secondary station, the network layer protocol control unit issues a connection request command to the lower layer when receiving a connection request command from the upper layer, and sends a connection request command from the upper layer to the connection request command from the upper layer. The communication device according to claim 1, wherein user data included is passed to a lower layer.   When the communication connection with the secondary station is performed, the network layer protocol control unit issues a connection confirmation command reception notification to the upper layer when receiving a connection confirmation command reception notification from the lower layer. The communication device according to claim 1, wherein user data included in the connection confirmation command reception notification is passed to an upper layer.   The network layer protocol control unit issues a connection request command reception notification to an upper layer when receiving a connection request command reception notification from a lower layer when performing communication connection with a primary station. The communication device according to claim 2, wherein user data included in the request command reception notification is passed to an upper layer.   When performing communication connection with the primary station, the network layer protocol control unit issues a connection confirmation command to the lower layer upon receiving a connection confirmation command from the upper layer, and sends the connection confirmation command to the connection confirmation command from the upper layer. The communication device according to claim 2, wherein the included user data is passed to a lower layer. A communication device as a secondary station that has a network layer, an upper layer that is a communication layer higher than the network layer, a lower layer that is a communication layer lower than the network layer, and communicates with the primary station,
Network layer protocol for issuing a connection request command reception notification to the upper layer without issuing a data transfer request command to the lower layer when receiving a connection request command reception notification from the lower layer when performing communication connection with the primary station With a control unit,
A communication device, wherein a value of a logical channel created by the primary station is preset in the network layer protocol control unit.   The communication device according to any one of claims 1 to 7, wherein the network layer protocol control unit conforms to IrLMP (Infrared Link Management Protocol). A communication method in a communication device as a primary station having a network layer, an upper layer as a communication layer higher than the network layer, and a lower layer as a communication layer lower than the network layer and communicating with a secondary station. And
When performing communication connection with the secondary station, the network layer issues a connection request command to the lower layer when a connection request command is received from the upper layer, and the lower layer when a connection confirmation command reception notification is received from the lower layer. A communication method characterized by issuing a connection confirmation command reception notification to an upper layer without issuing a data transfer request command to a layer, and creating a logical channel with a predetermined fixed value. A communication method in a communication device as a secondary station that has a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer and communicates with the primary station. And
When communication connection with the primary station is performed, when a connection request command reception notification is received from the lower layer, a connection request command reception notification is issued to the upper layer without issuing a data transfer request command to the lower layer. A connection confirmation command is issued to a lower layer when a connection confirmation command is received from the mobile station, and communication connection is performed using a logical channel having a value set in advance as a logical channel value created by the primary station. Communication method. A communication method in a communication device as a secondary station that has a network layer, an upper layer that is a communication layer higher than the network layer, and a lower layer that is a communication layer lower than the network layer and communicates with the primary station. And
When communication connection with the primary station is performed, when a connection request command reception notification is received from the lower layer, a data transfer request command is not issued to the lower layer and a connection request command reception notification is issued to the upper layer. A communication method comprising performing communication connection by a logical channel having a value set in advance as a logical channel value created by a primary station.   A communication system comprising the communication device according to claim 1 and the communication device according to claim 2.   A communication program for operating the communication device according to any one of claims 1 to 8, wherein the communication function causes a computer to function as the network layer protocol control unit. A communication circuit for operating the communication device according to any one of claims 1 to 8,
A communication circuit that functions as the network layer protocol control unit.   A mobile phone comprising the communication device according to claim 1 and performing communication using the communication device.   A display device comprising the communication device according to any one of claims 1 to 8, wherein the display device displays data based on data received by the communication device.   A printing apparatus comprising the communication device according to claim 1 and printing based on data received by the communication device.   A recording apparatus comprising the communication device according to any one of claims 1 to 8, and recording data received by the communication device.

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