Method and apparatus for dynamic negotiation of protocols
View Patent ↗Two intelligent nodes are provided with the capability of negotiating a protocol between them so that if the intelligent nodes operate at two different protocols then they can select a protocol appropriate for their communication. Furthermore, the intelligent nodes are provided with a locking shift capability so as to select between codesets that are available within a selected protocol.
1. A method of changing a codeset within a communication protocol, comprising:
transmitting a codeset designator, from a first node to a second node after a communication protocol and a first codeset have been established between the first node and the second node, wherein the codeset designator identifies one of a plurality of codesets available for use under the communication protocol;
transmitting control information, from the first node to the second node, wherein the control information identifies whether the codeset identified by the transmitted codeset designator is to be used on a temporary basis; and
transmitting data, from the first node to the second node, in accordance with the established communication protocol and the transmitted codeset designator.
2. The method of claim 1 , wherein the codeset designator identifies the first codeset.
3. The method of claim 1 , wherein the codeset designator identifies a codeset other than the first codeset.
4. The method of claim 1 , wherein the communication protocol and the first codeset are established by negotiation between the first node and the second node.
5. The method of claim 1 , wherein the communication protocol and the first codeset are established by selection of the communication protocol and the first codeset from a database associated with the first node.
6. The method of claim 1 , wherein if the control information indicates that the codeset identified by the transmitted codeset designator is selected on a temporary basis, then the codeset identified by the transmitted codeset designator remains in effect until the next parameter is transmitted.
7. The method of claim 1 , wherein if the control information indicates that the codeset identified by the transmitted codeset designator is not selected on a temporary basis, then the codeset identified by the transmitted codeset designator remains in effect until subsequent transmitted control information indicates that the codeset identified by a subsequent transmitted codeset designator is selected on one of a temporary basis and a permanent basis.
8. A communication node including a database that stores a protocol identification parameter associated with communication between the communication node and another communication node, wherein the stored protocol identification parameter is updated whenever the communication node receives a protocol identification parameter from the another communication node, and wherein the protocol identification parameter includes an identity of a codeset, wherein the codeset identifies one of a plurality of codesets available for use under a communication protocol.
9. The communication node of claim 8 , wherein the protocol identified by the protocol identification parameter associated with communication between the communication node and another communication node is automatically selected when communication between the communication node and the another communication node is initiated.
10. The communication node of claim 8 , wherein the protocol identification parameter identifies the protocol as IS-41.