JPS59112744A - Control system of packet switching batch communication - Google Patents

Abstract

PURPOSE:To reduce the number of logical channels which are used at a terminal and the number of terminal sent packets by transmitting and receiving a call request packet or data packet at the terminal in a bundle by one packet. CONSTITUTION:A terminal 1 sends the call request packet 5 which consists of pieces of terminal identification information 9 and 10 on terminals 3 and 4 and an additional logical channel CH number 8 to an exchange 2. The exchange 2 sends the incoming call packet 6 which consists of originating terminal identification information 11 and an additional logical CH number 12 to the terminal an d the incoming call packet 7 which consists of the information and an additional logical CH number 13 to the terminal 14. The exchange 2 waits the arrive of incoming-call acceptance packets from the terminals 3 and 4 for a specific time, and edits and sends a connection completion packet 16 to the terminal 1 once receiving the incoming-call acceptance packet 14 and 15. The pieces of identification information 9 and 10 on the terminals which return the incoming-call acceptance packets are added to the packet 16, so the originating terminal knows the party terminals which finish call setting normally.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a packet switching batch communication control system for performing call setup and data transfer between one packet terminal and a plurality of partner packet terminals in a packet switching network.

Background of the Technology In a packet-switched network, when a call is set up between one packet terminal and multiple destination packet terminals, and when data packets are sent and received, each logical channel is Processes such as transmission and reception of call request packets and sequence number management are performed for each channel.

Prior Art and Problems As mentioned above, conventionally, when one packet terminal (hereinafter referred to as a terminal) attempts to set up a call with multiple partner terminals, a call request is made for each logical channel using the same number of logical channels as the number of partner terminals. I needed to send and receive packets. Furthermore, when a terminal transmits and receives data packets to and from multiple partner terminals, it is necessary to perform processing such as sequence number management for each logical channel using the same number of logical channels as the number of partner terminals.

For this reason, the number of logical channels used by the terminal and the number of packets sent from the terminal increase, and it is inevitable that the communication control processing at the terminal becomes complicated and enormous.

Purpose of the Invention The present invention provides a system in which a terminal simultaneously sets up a call and sends/receives data to/from multiple terminals using one logical channel, and the terminal sends/receives a call request packet or a data packet in one packet. The purpose of this is to reduce the number of logical channels used by terminals and to reduce the number of packets sent from terminals, thereby facilitating communication control processing for multiple terminals.

Embodiment of the Invention Figure 1 α and b are examples of transmission from one terminal to multiple terminals.
FIGS. 1a and 1b are diagrams illustrating the state of call request connection and connection completion, respectively. In addition, the following Figure 2 α, b
-FIGS. 4a and 4b are also diagrams for explaining the state of call request connection and connection completion, respectively. 1 is a calling terminal, 2 is an exchange, and 3 and 4 are terminals with which terminal 1 attempts to communicate. In the embodiments after this embodiment, the case where the number of communication partner terminals of the terminal 1 is two will be exemplified. Terminal 1 transmits a call request packet 5 to which terminal identification information 9 and 10 of terminals 6 and 4 and logical channel number 8 are added to switching center 2 . The switching center 2 transmits the incoming call packet 6 to which the calling terminal identification information 11 and the logical channel number 12 are added to the terminal 6, and also sends the calling packet 6 to which the calling terminal identification information 11 and the logical channel number 1 are added to the terminal 4.
The incoming call number 7 is sent with 6 appended. The exchange 2 then waits for the arrival of call acceptance packets from terminals 6 and 4 for a certain period of time, and when it receives the call acceptance packets 14 and 15 from terminals 6 and 4, it edits the connection completion packet 16 and sends it to terminal 1. Send. By adding to the packet 16 the identification information of the terminal that returned the incoming call acceptance packet, the originating terminal can know which terminal has successfully completed the call setup. Furthermore, if the exchange 2 cannot receive an incoming call acceptance packet from the terminal 6 or 4 even after a certain period of time has elapsed, the terminal identification information is not added to the connection completion packet sent to the calling terminal.

FIG. 2 α and b are examples of calls from multiple terminals to the same terminal. Terminals 3 and 4 have logical channel numbers 12 or 16
and communication partner terminal (terminal 1 in this embodiment) identification information 11 are added, and nine call request packets 17 and 18 are transmitted, respectively. The exchange 2 edits one incoming call packet 19 from the call request packets 17 and 18 received within a certain period of time and sends it to the terminal 1.

Terminal identification information 9.10 corresponding to the originating terminal of the call request packet received within a certain period of time and logical channel number 8 are added to the packet 19. Then, the exchange 2, which received the incoming call acceptance packet (20) sent from the terminal 1, sends a connection completion packet (2) to the calling terminals 3 and 4, respectively.
1 and 22 are sent.

Note that logical channel number 8 and calling terminal identification information 9 and 10 are added to packet 20, and packets 21 and 22
are appended with logical channel numbers 12 and 16, respectively.

FIGS. 6a and 6b show an embodiment in which data is transmitted from one terminal to a plurality of terminals at once. Exchange 2, which received data packet 23 containing logical channel number 8 and user data 26 from terminal 1, sends data containing user data 26 identical to packet 26 and logical channel number 12 or 13 to terminals 6 and 4, respectively. Packets 24 and 2
Send 5. When the exchange 2 receives the receivable packet 27.28 from the terminals 6 and 4 within a certain period of time, the exchange 2 receives the terminal identification number (9.10 in this embodiment) of the terminal that was able to receive the receivable packet 27.28. A receivable packet 29 with a logical channel number 8 added thereto is transmitted to the terminal 1.

Logical channel numbers 12 and 16 are added to packets 27 and 28, respectively. Note that if exchange 2 cannot receive a receivable packet from the receiving terminal (terminal 6 or 4) within a certain period of time, the receivable packet sent to terminal 1 (sending terminal) will be sent to the receiving terminal. terminal identification number is not added.

FIGS. 4a and 4b show an embodiment in which one terminal receives data from a plurality of terminals all at once. An exchange that receives data packet 6 (including logical channel number 12 and user data 65) transmitted from terminal 6'' and data packet 2 (including logical channel number 16 and user data 65) transmitted from terminal 4. 2 is user data 34 and 65 included in packets 31 and 62 and transmitting terminal identification information 9
and 10 into a data packet 63 and send it to the terminal 1. Packet 56 also includes logical channel number 8. Note that if the exchange 2 cannot receive a data packet from the transmitting terminal within a certain period of time, it transmits to the terminal 1 a data packet to which only the user data of the received data packet and its transmitting terminal identification information are added. Then, the exchange 2 receives the receivable packet 36 including the logical channel number 8 and the transmitting terminal identification information 9 and 10, and transmits the information to the terminals 3 and 4.
Receivable packets 67 and 68 are transmitted to the respective nodes. Note that packets 37 and 39 include logical channel numbers 12 and 13, respectively.

As described in detail of the invention, the terminal 1 performs call setup and data transmission/reception with multiple terminals at once using a logical channel, and when transmitting the call request packet 1 or the data packet, A terminal only sends one packet, and the network sends the packets to multiple destination terminals at once.
This has the advantage that the number of logical channels used by the terminal can be reduced, the number of packets sent from the terminal can be reduced, and communication control processing of the terminal can be facilitated.

[Brief explanation of drawings]

Figures 1a and 1b show implementation sections of the present invention) and show an example of transmission from a terminal to a plurality of terminals. FIGS. 2a and 2b show another embodiment of the present invention, which is an example of transmissions from a plurality of terminals to the same terminal. FIG. 6 σ and b show another embodiment of the present invention, which is an example in which data is transmitted from a terminal to a plurality of terminals at once. No. 454.
o, b are other embodiments of the present invention, and are examples in which a terminal receives data from a plurality of terminals at once. 1.3.4...Packet terminal, 2...Switching center, 5
, 17.18... call request packet, 6, 7.19...
...Incoming call packet, 14.15.20...Incoming call acceptance packet, 16,21.22...Connection completion packet, 2
3, 24, 25, 32. 33... data packet, 2
7.28, 29, 36, 37.38... Receivable packet, 8, 12.13... Logical channel number, 9, 10
．． 11...Terminal identification information. Patent Issuer Nippon Telegraph and Telephone Public Corporation Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a packet switching network consisting of a plurality of packet terminals and a switching center that accommodates the packet terminals via subscriber lines, between one packet terminal among the plurality of packet terminals and any plurality of packet terminals. When performing call setup and data transmission/reception at the same time, the switching center uses one logical channel to send one call request packet or one data packet received from one packet terminal to the plurality of packet terminals at the same time. A packet switching batch communication control method characterized in that a plurality of call request packets or a plurality of data packets transmitted and conversely received from the plurality of packet terminals are combined into one and transmitted to the one packet terminal.