Node, Another Node, and Methods Performed Thereby for Supporting Domain Name System Over Constrained Application Protocol

A method performed by a node operating in a communications network, wherein the node supports operation on a Constrained Application Protocol, CoAP, and wherein the node is incapable of supporting operation on a Domain Name System, DNS, protocol, the method comprising:

• encoding a DNS query into a first message, the first message having a CoAP format supported by the CoAP, wherein the DNS query is mapped to the CoAP format based on a mapping scheme;
• initiating sending the first message to another node operating in the communications network, the another node supporting operation on the CoAP and on the DNS protocol;
• and
• receiving a second message from the another node, the second message having the CoAP format supported by the CoAP, and the second message comprising a DNS response to the DNS query, wherein the DNS response is mapped to the CoAP format based on the mapping scheme.

A method performed by another node operating in a communications network, wherein the another node supports operation on a Constrained Application Protocol, CoAP, and operation on a Domain Name System, DNS, protocol, the method comprising:

• receiving a first message from a node operating in the communications network, the node supporting operation on the CoAP, and the node being incapable of supporting operation on the DNS protocol, the received first message comprising a DNS query, the received first message having a CoAP format supported by the CoAP, wherein the DNS query is mapped to the CoAP format based on a mapping scheme;
• encoding a DNS response to the received DNS query into a second message, the second message having the CoAP format supported by the CoAP, wherein the DNS response is mapped to the CoAP format based on the mapping scheme;
• and
• initiating sending the second message to the node.

A node configured to operate in a communications network, wherein the node is further configured to support operation on a Constrained Application Protocol, CoAP, and wherein the node is configured to be incapable of supporting operation on a Domain Name System, DNS, protocol, the node comprising:

• radio circuitry;
• and
• processing circuitry configured to:
• encode a DNS query into a first message, the first message having a CoAP format supported by the CoAP, wherein the DNS query is mapped to the CoAP format based on a mapping scheme,
• initiate sending the first message to another node configured to operate in the communications network, the another node being further configured to support operation on the CoAP and on the DNS protocol;
• and
• receive a second message from the another node, the second message having the CoAP format supported by the CoAP, and the second message comprising a DNS response to the DNS query sent, wherein the DNS response is mapped to the CoAP format based on the mapping scheme.

An another node configured to operate in a communications network, wherein the another node is configured to support operation on a Constrained Application Protocol, CoAP, and operation on a Domain Name System, DNS, protocol, the another node comprising:

• radio circuitry;
• and
• processing circuitry configured to:
• receive a first message from a node that is configured to operate in the communications network, that is configured to support operation on the CoAP, and that is incapable of supporting operation on the DNS protocol, wherein the first message comprises a DNS query and has a CoAP format supported by the CoAP, wherein the DNS query is mapped to the CoAP format based on a mapping scheme;
• encode a DNS response to the DNS query into a second message, the second message having the CoAP format supported by the CoAP, wherein the DNS response is mapped to the CoAP format based on the mapping scheme;
• and
• initiate sending the second message to the node.