1. A method of accessing services affiliated with a service provider, the method comprising:', 'performing a first discovery procedure to discover at least one service provider;', 'performing a bootstrap procedure with the at least one discovered service provider; and', 'performing a second discovery procedure to determine available service capability layers (SCLs) supported by the at least one discovered service provider.

2. The method of claim 1 wherein the first discovery procedure comprises:', 'transmitting a service provider discovery request including information for querying a record database to determine matching service provider discovery records; and', 'receiving a service provider discovery response including a service discovery function record list that matches queries in the service provider discovery request.

3. The method of claim 2 further comprising:', 'selecting at least one service provider from the service discovery function record list to bootstrap with.

4. The method of claim 3 wherein the bootstrap procedure comprises: transmitting a request to the selected service provider; and', 'receiving a response from the selected service provider including information needed by the node to initiate bootstrapping with at least one SCL of the service provider.

5. The method of claim 4 wherein the information includes security credentials.

6. The method of claim 1 wherein the second discovery procedure comprises:', 'an issuer transmitting a service discovery request including information for querying a record database to determine matching SCL discovery records; and the issuer receiving a service discovery response including a service discovery function record list that matches queries in the service discovery request.

7. The method of claim 6 wherein the service discovery function record list includes a plurality of SCL addresses, the method further comprising: the issuer transmitting an SCL discovery request to a known resource to discover a uniform resource identifier (URI) of each of the SCL addresses that do not indicate a full URI path to an SCL located on a host;', 'the issuer receiving an SCL discovery response from the known resource including the discovered URIs; and', 'the issuer selecting at least one SCL from the service discovery function record list to bootstrap with.

8. The method of claim 1 wherein the second discovery procedure comprises:', 'provisioning a domain name system-based service discovery (DNS-SD) machine-to-machine (M2M) service discovery function (MSDF) server with SCL discovery records;', 'registering the DNS-SD MSDF server with a public DNS registrar company or entity to establish a public DNS-SD MSDF service discovery domain; the DNS-SD MSDF server receiving DNS-SD queries from an issuer; and the DNS-SD MSDF server transmitting SCL discovery records to the issuer in response to the DNS-SD queries.

9. The method of claim 1 wherein the second discovery procedure comprises:', 'receiving an SCL discovery request from an issuer; and', 'transmitting a service discovery response which provides the issuer with SCL discovery results

10. The method of claim 9 wherein the SCL discovery request includes query strings that use sclBase attributes

11. The method of claim 10 wherein the SCL discovery response includes a list of SCLs that match the query strings and an absolute uniform resource identifier (URI) to an sclBase for each of the SCLs

12. The method of claim 1 wherein the second discovery procedure comprises:', 'provisioning or configuring an issuer with a network address of a deployed domain name system (DNS) server;', 'provisioning or configuring the issuer with at least one fully qualified domain name (FQDN) for hosts with available SCLs;', 'the issuer transmitting a DNS lookup request to the deployed DNS server using the network address and FQDN; and', 'the issuer receiving a resolved network address for a corresponding SCL host

13. The method of claim 1 wherein the second discovery procedure comprises:', 'provisioning or configuring an issuer with a network address of a dynamic host configuration protocol (DHCP) server;', 'the issuer transmitting DHCP requests to the deployed DHCP server; and the issuer receiving a response including the address of an SCL and additional SCL information

14. A method of accessing services affiliated with a service provider, the method comprising:', 'provisioning or configuring an issuer with a network address of a deployed domain name system (DNS) server;', 'provisioning or configuring the issuer with at least one fully qualified domain name (FQDN) for hosts with available service capability layers (SCLs); the issuer transmitting a DNS lookup request to the deployed DNS server using the network address and FQDN; and', 'the issuer receiving a resolved network address for a corresponding SCL host

15. The method of claim 14 wherein the issuer is a wireless transmit/receive unit (WTRU)

16. Apparatus configured to perform a first discovery procedure to discover at least one service provider, perform a bootstrap procedure with the at least one discovered service provider, and then perform a second discovery procedure to determine available service capability layers (SCLs) supported by the at least one discovered service provider

17. The apparatus of claim 16 wherein the apparatus is a wireless transmit/receive unit (WTRU)

20. A computer-readable storage medium configured to store an application configured to perform a first discovery procedure to discover at least one service provider, perform a bootstrap procedure with the at least one discovered service provider, and then perform a second discovery procedure to determine available service capability layers (SCLs) supported by the at least one discovered service provider.']