Wireless terminal data network communication

• US 6,011,790 A
• Filed: 06/07/1996
• Issued: 01/04/2000
• Est. Priority Date: 06/07/1996
• Status: Expired due to Term

• Current Assignee: Bell Mobility Cellular, Inc. (BCE Incorporated)
• Original Assignee: Bell Mobility Cellular, Inc. (BCE Incorporated)
• Inventors: Fisher, Bradley J.
• Primary Examiner(s): NGUYEN, CHAU T
• Application Number:
  US08/659,914
• Time in Patent Office: 1,306 Days
• Field of Search: 370/328, 370/338, 370/395, 370/397-399, 370/389, 370/401, 370/402, 370/465, 370/466, 370/349, 455/403, 455/406, 455/408, 455/409, 455/410, 709/219
• US Class Current: 370/349
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A gateway computer is connected to a wireless station switch which receives and sends transaction processing data between remote terminals and a transaction processing host. The gateway interprets an exception code in the data packet received from the terminals to determine whether data is to be forwarded or whether a predetermined circuit management activity is to be carried out by the gateway for the purposes of call request, call accepting, acknowledging, negative acknowledging, call clear requesting, call clear confirming or call reset confirming. The terminals make use of the exception code to make it easier for the gateway to either pass on data or carry out the predetermined circuit management activity while reducing both the amount of interpretation and processing required by the gateway and reducing over-the-air traffic between the terminals and the wireless station.

Claims

1. A method of data network communication for transmitting data between a plurality of remote terminals and a transaction processing host comprising the steps of:

i) transmitting said data by wireless means from the remote terminals to a wireless station switch in a first data packet format;

ii) relaying said data through said station switch to a network gateway in a second packet format;

iii) transmitting said data between said gateway and through a packet switching network to said host using a third packet format; and

,

iv) interpreting an exception code in a response packet received from said terminals to determine whether a predetermined circuit management activity is to be carried out by said gateway, said predetermined circuit management activity being an activity selected from the group consisting of;

call requesting;

call accepting;

acknowledging;

negative acknowledging;

call clear requesting;

call clear confirming; and

call reset confirming;

said exception code causing said gateway to perform said predetermined circuit management activity without requiring additional wireless transmission, and;

wherein said remote terminals manage all communications with said host and fully control end-to-end communication of transactions with said host.

2. The method as claimed in claim 1, wherein said gateway maintains a table of terminal unit identification addresses and corresponding virtual circuit addresses on said packet switching network and builds for each packet of data transmitted from said gateway to said host and address header from said third packet format.

3. The method as claimed in claim 1, wherein said gateway interprets said exception code in said response packet received from said terminals to further determine whether data is to be forwarded without processing, data is to be forwarded after decompression, data is to be forwarded after decryption, or data is to be forwarded with a predetermined packet header of a type identified by the exception code.

4. The method as claimed in claim 1, wherein said terminals maintain a flag indicating whether a virtual circuit (VC) on said packet switching network between said host and said gateway is set up or not, and said terminals send call request commands to set up said VC when said flag indicates that said VC is not set up when communication is required.

5. The method as claimed in claim 1, wherein communication between said terminals and a plurality of hosts is provided, said terminals send packets to one of said plurality of hosts by addressing one of a plurality of addresses for said gateway on said station switch.

6. The method as claimed in claim 5, wherein one of said hosts is a messaging host.

7. The method as claimed in claim 5, wherein said terminals communicate only with one of said hosts at a time, said gateway has a single circuit number assigned to each one of said terminals and sends packets received from, said hosts from a corresponding one of said plurality of addresses for said gateway.

8. The method as claimed in claim 1, wherein said terminals send to said host at regular intervals of inactivity a packet message including a heartbeat exception code indicative of being activated, said gateway automatically taking down a virtual circuit (VC) on said packet switching network between said host and said gateway for those terminals not having sent a heartbeat exception code after a predetermined time period longer than said regular interval.

9. The method as claimed in claim 8, wherein said terminals maintain a flag indicating whether said VC between said host and said gateway is set up or not, and said terminals send call request commands to set up said VC when said flag indicates that said VC is not set up when communication is required.

10. The method as claimed in claim 1, wherein said terminals include a transmitter-receiver device connected to a POS device by a fixed line, said transmission of said data from said terminals to said station switch comprises:

transferring POS transaction data between said POS device and said transmitter-receiver device according to a POS device protocol;

preparing outgoing data packets in said first format including said exception code based on data received from said POS device in said transmitter-receiver device;

sending said first wireless data packets from said transmitter-receiver device to said station switch with an address corresponding to said gateway;

receiving said first wireless data packets from said station switch at said transmitter-receiver device; and

converting said first wireless data packets received into POS device protocol data for transfer to said POS device.

11. The method as claimed in claim 7, wherein said terminals send to said host at regular intervals of inactivity a packet message including a heartbeat exception code indicative of being activated, said gateway automatically taking down a virtual circuit (VC) on said packet switching network between said host and said gateway for those terminals not having sent a heartbeat exception code after a predetermined time period longer than said regular interval.

12. The method as claimed in claim 11, wherein said terminals maintain a flag indicating whether said VC between said host and said gateway is set up or not, and said terminals send call request commands to set up said VC when said flag indicates that said VC is not set up when communication is required.

13. The method as claimed in claim 7, wherein said terminals include a transmitter-receiver device connected to a POS device by a fixed line, said transmission of said data from said terminals to said station switch comprises:

transferring POS transaction data between said POS device and said transmitter-receiver device according to a POS device protocol;

preparing outgoing data packets in said first format including said exception code based on data received from said POS device in said transmitter-receiver device;

sending said first wireless data packets from said transmitter-receiver device to said station switch with an address corresponding to said gateway;

receiving said first wireless data packets from said station switch at said transmitter-receiver device; and

converting said first wireless data packets received into POS device protocol data for transfer to said POS device.

14. The method as claimed in claim 8, wherein said terminals include a transmitter-receiver device connected to a POS device by a fixed line, said transmission of said data from said terminals to said station switch comprises:

transferring POS transaction data between said POS device and said transmitter-receiver device according to a POS device protocol;

preparing outgoing data packets in said first format including said exception code based on data received from said POS device in said transmitter-receiver device;

sending said first wireless data packets from said transmitter-receiver device to said station switch with an address corresponding to said gateway;

receiving said first wireless data packets from said station switch at said transmitter-receiver device; and

converting said first wireless data packets received into POS device protocol data for transfer to said POS device.

15. The method as claimed in claim 1, wherein said remote terminals are POS terminals, and said transaction processing host is a financial transaction processing host of a banking institution.

16. The method as claimed in claim 1, wherein said terminals manage all communications with said host to perform transactions using a transaction protocol based on said third packet format used by said host.

17. The method as claimed in claim 1, wherein said terminals use said exception code to cause said gateway to perform said predetermined circuit management activity without requiring additional wireless transmission, whereby said terminals fully control end-to-end communication of said transactions with a reduced amount of wireless activity.

18. A method for data network communication for transmitting data between a transaction processing host and a plurality of remote terminals comprising the steps of:

i) transmitting data through a packet switching network from said host to a network gateway,

ii) interpreting packets received from said host to build an exception code in each packet to be sent to said terminals, the exception code indicating whether a predetermined circuit management activity is being carried out by said gateway;

iii) relaying said data from said gateway through a wireless station switch, and

iv) transmitting said data by wireless means from the wireless station switch to said remote terminals,

said pre-determined circuit management activity being an activity selected from the group consisting of;

call requesting;

call accepting;

acknowledging;

negative acknowledging;

call clear requesting;

call clear confirming; and

call reset confirming;

wherein said exception code causes said gateway to perform said predetermined circuit management activity without requiring additional wireless transmission, and wherein said remote terminals manage all communications with said host and fully control end-to-end communication of transactions with said host.

19. The method as claimed in claim 18, wherein said gateway is in communication with a plurality of hosts, and said exception code includes information to identify one of said hosts.

20. The method as claimed in claim 18, wherein the exception code further indicates at least one of whether data in the packet sent to the terminals is encrypted, whether data in the packet sent to the terminals is compressed, whether data in the packet sent to the terminals is messaging data, and whether data in the packet sent to the terminals is standard transaction data.

21. The method as claimed in claim 18, wherein a virtual circuit on said packet switching network between said host and said gateway is established for each one of said terminals, with said gateway sending packets to said terminals using a terminal identification address corresponding to an address of said virtual circuit.

22. A system for data network communication comprising:

a first transaction processing host;

at least one remote wireless terminal in communication with said first host;

a station switch for receiving data in packet format and relaying said data;

a gateway for receiving said data from said station switch and transmitting data to said host, said gateway for carrying out a predetermined circuit management activity in response to said exception code received from said at least one remote wireless terminal and for generating an exception code message in response to messages received from said host and sending said exception code message to said terminal,

wherein said predetermined circuit management is at least one of call requesting, call accepting, acknowledging, negative acknowledging, call clear requesting, call clear confirming, and call reset confirming.

23. The system for data network communications as claimed in claim 22, further comprising a table of terminal unit identification addresses maintained by said gateway.

24. The system of data network communications as claimed in claim 22, wherein said at least one remote wireless terminal include flag indicating means to indicate whether a virtual circuit is established between said host and said gateway.

25. The system of data network communication of claim 22, wherein said system includes two or more transaction processing hosts.

26. The system for data network communications as claimed in claim 22, further comprising a wireless data tower connected to said station switch, said wireless data tower used for communication between said station switch and said wireless terminal.