Arrangements and method for hierarchical resource management in a layered network architecture
A data network, method and a computer program product, wherein the data network is implemented by a first network level ( 104 ) having a first addressing scheme and at least a second network level ( 108 ) having a second addressing scheme. Each network level provides connectivity over at least one network domain. A first group of Network Resource Managers, NRMs, (b-d)) is arranged to control the resources of the first network level and a second group of NRMs (e-g) is arranged to control the resources of the second network level. The NRMs of the first group (b-d) and second group (e-g) exchange resource requests by using the first addressing scheme and the NRMs (e-g) of the second group perform an address mapping between the first and second addressing schemes.
1. A method in a data network implemented by a first network level having a first addressing scheme and at least a second network level having a second addressing scheme, each network level providing connectivity over at least one network domain, the method comprising the steps of:
controlling resources of the first network level by a first group of Network Resource Managers (NRMs);
controlling resources of the second network level by a second group of NRMs, wherein the first group and the second group of NRMs comprise means for communicating on a common network level;
exchanging resource requests between the NRMs of the first and second groups using the first addressing scheme, the NRMs of the first group and the second group admitting new resource requests based at least in part on a total amount of available resources, an amount of resources currently reserved by previous reservations, and an amount of resources requested in the new resource requests; and
performing an address mapping between the first and second addressing schemes so that a set of resources that is used by a reservation in the second group, controlled and known by the second group, is aggregated into a single resource in the first group of NRMs.
2. The method according to claim 1 , wherein the first network level is the Internet Protocol (IP) layer.
3. The method according to claim 2 , wherein the second network level is a link protocol layer.
4. The method according to claim 2 , wherein the second network level is a second IP layer controlling an overlay network on top of said IP layer.
5. The method according to claim 2 , wherein the second network level is a second protocol layer controlling an overlay network on top of the IP layer.
6. The method according to claim 1 , wherein the data network further comprises a third network level having a third addressing scheme and the method comprises the further steps of:
controlling resources of said third network level by a third group of NRMs; and
exchanging resource requests between any of the NRMs of the first and second network levels using the first addressing scheme.
7. The method according to claim 6 , further comprising the step of:
performing an address mapping between the first and third addressing schemes.
8. The method according to claim 7 , wherein the third network level is a third protocol layer controlling an overlay network on top of the IP layer.
9. The method according to claim 7 , wherein the third network level is a second IP layer controlling an overlay network on top of said IP layer.
10. The method according to claim 7 , wherein the third network level is a link protocol layer.
11. The method according to claim 1 , wherein the NRMs within at least one of said groups are arranged in a hierarchical structure arranged to communicate with each other.
12. The method according to claim 1 , wherein each of the NRMs is a logically centralized unit in a network.
13. The method according to claim 12 , wherein said logically centralized unit is distributed or backed up over several physical servers.
14. The method according to claim 1 , wherein the data network in at least one of the network levels comprises a Network Controller (NC), wherein the method comprises the further steps of:
receiving by the NC a request from an NRM; and
obtaining detailed information including at least one of topology maps, traffic measurement information, and alarms of the network domain that is controlled by said NRM in response to said request.
15. The method according to claim 14 , wherein the data network in at least one of the network levels comprises a Device Controller (DC), wherein the method further comprises the steps of:
receiving by the DC a request from the NC; and
controlling vendor specific node technologies in response to said request.
16. The method according to claim 15 , wherein the DC is co-located with the NC in the at least one of the network domains.
17. A computer program product stored on a computer usable medium, comprising readable program for causing a computer, within a router or a server in the data network to control an execution of the steps of claim 1 .