Communication system

Claim 2

A communication system comprising: a gateway; at least two terminal equipments residing in different communication networks respectively and mutually connected via the gateway, wherein one of the terminal equipments transmits a first communication message to the gateway and the gateway generates a second communication message on the basis of the first communication message and transmits the second communication message to the other of the terminal equipments, wherein each of the terminal equipments having sections, and wherein different addresses are allotted to the gateway, the terminal equipments, and the sections of the terminal equipments respectively; wherein each of the first and second communication messages comprises a source address, a destination address, a first header information set, at least one data block, and an end code; the source address corresponding to one of the gateway and the terminal equipments from which the related message is transmitted, the destination address corresponding to one of the gateway and the terminal equipments to which the related message is directed, the first header information set following the source address and the destination address, the data block following the first header information set, the end code following the data block, the end code representing an end of the first header information set; wherein the first header information set comprises a head code, routing information, and presence/absence information; the presence/absence information following the head code and preceding the routing information, the head code representing a head of the first header information set, the routing information relating to addresses of the terminal equipments to and from which the messages are directed and transmitted, the presence/absence information representing that the routing information is present or absent; wherein the data block comprises a second header information set, a command, and a second end code; the command being given to one of the sections of the terminal equipment to which the message is directed, the second end code representing an end of the data block; wherein the second header information set comprises a second head code, second routing information, second presence/absence information, and command information; the second presence/absence information and the command information following the second head code and preceding the second routing information, the second head code representing a head of the second header information set, the second routing information relating to addresses of sections of the terminal equipments to and from which the messages are directed and transmitted, the second presence/absence information representing that the second routing information is present or absent, the command information representing a type of the command.

Claim 3

The communication system of claim 1 wherein the gateway comprises: means for determining the source address of the second message in accordance with the destination address of the first message; means for determining the destination address of the second message in accordance with the routing information in the first header information set of the first message; and means for determining the routing information in the first header information set of the second message in accordance with the source address of the first message and with the routing information in the first header information set of the first message.

Claim 4

A communication system comprising: a gateway; at least two terminal equipments residing in different communication networks respectively and mutually connected via the gateway, wherein one of the terminal equipments transmits a first communication message to the gateway and the gateway generates a second communication message on the basis of the first communication message and transmits the second communication message to the other of the terminal equipments, wherein each of the terminal equipments having sections, and wherein different addresses are allotted to the gateway, the terminal equipments, and the sections of the terminal equipments respectively; wherein each of the first and second communication messages comprises a source address, a destination address, a first header information set, at least two data block, and an end code; the source address corresponding to one of the gateway and the terminal equipments from which the related message is transmitted, the destination address corresponding to one of the gateway and the terminal equipments to which the related message is directed, the first header information set following the source address and the destination address, the data blocks following the first header information set, the end code following the data blocks, the end code representing an end of the first header information set; wherein the first header information set comprises a head code, routing information, and presence/absence information; the presence/absence information following the head code and preceding the routing information, the head code representing a head of the first header information set, the routing information relating to addresses of the terminal equipments to and from which the messages are directed and transmitted, the presence/absence information representing that the routing information is present or absent; wherein each of the data blocks comprises a second header information set, a command, and a second end code; the command being given to one of the sections of the terminal equipment to which the message is directed, the second end code representing an end of the data block; wherein the second header information set comprises a second head code, second routing information, second presence/absence information, and command information; the second presence/absence information and the command information following the second head code and preceding the second routing information, the second head code representing a head of the second header information set, the second routing information relating to addresses of sections of the terminal equipments to and from which the messages are directed and transmitted, the second presence/absence information representing that the second routing information is present or absent, the command information representing a type of the command; wherein one of the data blocks is interposed in the other of the data blocks in a nesting arrangement.

Claim 5

A communication system comprising: a gateway; at least two terminal equipments residing in different communication networks respectively and mutually connected via the gateway, wherein one of the terminal equipments transmits a first communication message to the gateway and the gateway generates a second communication message on the basis of the first communication message and transmits the second communication message to the other of the terminal equipments, wherein each of the terminal equipments having sections, and wherein different addresses are allotted to the gateway, the terminal equipments, and the sections of the terminal equipments respectively; wherein each of the first and second communication messages comprises a source address, a destination address, a first header information set, at least two data block, and an end code; the source address corresponding to one of the gateway and the terminal equipments from which the related message is transmitted, the destination address corresponding to one of the gateway and the terminal equipments to which the related message is directed, the first header information set following the source address and the destination address, the data blocks following the first header information set, the end code following the data blocks, the end code representing an end of the first header information set; wherein the first header information set comprises a head code, routing information, and presence/absence information; the presence/absence information following the head code and preceding the routing information, the head code representing a head of the first header information set, the routing information relating to addresses of the terminal equipments to and from which the messages are directed and transmitted, the presence/absence information representing that the routing information is present or absent; wherein each of the data blocks comprises a second header information set, a command, and a second end code; the command being given to one of the sections of the terminal equipment to which the message is directed, the second end code representing an end of the data block; wherein the second header information set comprises a second head code, second routing information, second presence/absence information, and command information; the second presence/absence information and the command information following the second head code and preceding the second routing information, the second head code representing a head of the second header information set, the second routing information relating to addresses of sections of the terminal equipments to and from which the messages are directed and transmitted, the second presence/absence information representing that the second routing information is present or absent, the command information representing a type of the command; wherein one of the data blocks is interposed in the other of the data blocks in a nesting arrangement.

Claim 6

A communication system comprising: a gateway; at least two terminal equipments residing in different communication networks respectively and mutually connected via the gateway, wherein one of the terminal equipments transmits a first communication message to the gateway and the gateway generates a second communication message on the basis of the first communication message and transmits the second communication message to the other of the terminal equipments, wherein each of the terminal equipments having sections, and wherein different addresses are allotted to the gateway, the terminal equipments, and the sections of the terminal equipments respectively; wherein each of the first and second communication messages comprises a source address, a destination address, a first header information set, at least on data block, and an end code; the source address corresponding to one of the gateway and the terminal equipments from which the related message is transmitted, the destination address corresponding to one of the gateway and the terminal equipments to which the related message is directed, the first header information set following the source address and the destination address, the data block following the first header information set, the end code following the data block, the end code representing an end of the first header information set; wherein the first header information set comprises a head code, routing information, and presence/absence information; the presence/absence information following the head code and preceding the routing information, the head code representing a head of the first header information set, the routing information relating to addresses of the terminal equipments to and from which the messages are directed and transmitted, the presence/absence information representing that the routing information is present or absent; wherein the data block comprises a second header information set and a command; the command being given to one of the sections of the terminal equipment to which the message is directed; wherein the second header information set comprises a second head code, a count code, second routing information, second presence/absence information, and command information; the count code following the second head code, the second presence/absence information and the command information following the count code and preceding the second routing information, the second head code representing a head of the second header information set, the second routing information relating to addresses of sections of the terminal equipments to and from which the messages are directed and transmitted, the second presence/absence information representing that the second routing information is present or absent, the command information representing a type of the command, the count code representing a number of data bytes in the data block.

Claim 7

A communication system comprising: a gateway; at least two terminal equipments residing in different communication networks respectively and mutually connected via the gateway, wherein one of the terminal equipments transmits a first communication message to the gateway and the gateway generates a second communication message on the basis of the first communication message and transmits the second communication message to the other of the terminal equipments, wherein each of the terminal equipments having sections, and wherein different addresses are allotted to the gateway, the terminal equipments, and the sections of the terminal equipments respectively; wherein each of the first and second communication messages comprises a source address, a destination address, a first header information set, at least on data block, and an end code; the source address corresponding to one of the gateway and the terminal equipments from which the related message is transmitted, the destination address corresponding to one of the gateway and the terminal equipments to which the related message is directed, the first header information set following the source address and the destination address, the data block following the first header information set, the end code following the data block, the end code representing an end of the first header information set; wherein the first header information set comprises a head code, routing information, and presence/absence information; the presence/absence information following the head code and preceding the routing information, the head code representing a head of the first header information set, the routing information relating to addresses of the terminal equipments to and from which the messages are directed and transmitted, the presence/absence information representing that the routing information is present or absent; wherein the data block comprises a second header information set and a command; the command being given to one of the sections of the terminal equipment to which the message is directed; wherein the second header information set comprises a second head code, a count code, second routing information, second presence/absence information, and command information; the count code following the second head code, the second presence/absence information and the command information following the count code and preceding the second routing information, the second head code representing a head of the second header information set, the second routing information relating to addresses of sections of the terminal equipments to and from which the messages are directed and transmitted, the second presence/absence information representing that the second routing information is present or absent, the command information representing a type of the command, the count code representing a number of data bytes in the data block.