Method and apparatus for generic encoding of configurable ran parameters over E2AP messages
A method of generic encoding of a radio access network (RAN) parameter exchanged over E2 application protocol (E2AP) between an Open Radio Access Network (O-RAN) node and a near-real time radio access network intelligent controller (near-RT RIC) includes: providing a generic encoding mechanism for a message structure containing at least one RAN parameter, wherein the generic encoding mechanism includes a first categorization of each RAN parameter exchanged between the O-RAN node and the near-RT RIC into one of ELEMENT type, STRUCTURE type or LIST type; wherein the ELEMENT type parameter is a singleton variable which does not have any other associated RAN parameter; the STRUCTURE type parameter is a sequence of RAN parameters in which each RAN parameter in the sequence can be one of the ELEMENT type parameter, another STRUCTURE type parameter, or the LIST type parameter; and the LIST type parameter is a list of STRUCTURE type parameters.
1 . A method of generic encoding of a radio access network (RAN) parameter exchanged over E2 application protocol (E2AP) between an Open Radio Access Network (O-RAN) node and a near-real time radio access network intelligent controller (near-RT RIC), comprising:
using a generic encoding mechanism, for a message structure containing at least one RAN parameter, providing a common message structure is provided for encoding at least one of i) RIC Control Request message for control service, and ii) RIC Indication Message for insert service, wherein the generic encoding mechanism includes a first categorization of each RAN parameter exchanged between the O-RAN node and the near-RT RIC into one of ELEMENT type, STRUCTURE type or LIST type;
wherein: the ELEMENT type parameter is a singleton variable which does not have any other associated RAN parameter;
the STRUCTURE type parameter is a sequence of RAN parameters in which each RAN parameter in the sequence can be one of the ELEMENT type parameter, another STRUCTURE type parameter, or the LIST type parameter; and
the LIST type parameter is a list of STRUCTURE type parameters, and
the generic encoding mechanism provides a recursive encoding structure enabling control of any RAN parameter, including the at least one RAN parameter, within any hierarchical level of nesting in 3GPP-defined parameter structures.
2 . The method according to claim 1 , wherein the sequence of RAN parameters is the same for all STRUCTURES within the LIST type parameter.
3 . The method of claim 1 , wherein the generic encoding mechanism includes a second categorization of each RAN parameter between i) a first type in which the value of the RAN parameter is directly controlled by the near-RT RIC, and ii) a second type in which the value of the RAN parameter serves as an index for the O-RAN node to further point to other RAN parameters.
4 . The method of claim 3 , wherein: the method enables exchange of any RAN parameter between the O-RAN node and the near-RT RIC; and the exchanged RAN parameter is controlled from the near-RT RIC.
5 . The method of claim 4 , wherein the method is compliant with O-RAN standards for E2 Service Model-RAN Control (E2SM-RC) service model.
6 . The method of claim 5 , wherein the E2SM-RC service model is used for at least one of the following O-RAN functionalities: traffic steering; quality of service (QOS); quality of experience (QoE); multiple input multiple output (MIMO) beamforming; and slicing.
7 . The method of claim 3 , wherein: for the purpose of distinguishing the ELEMENT type RAN parameter between the first type and the second type, a Boolean key flag is associated with every ELEMENT type RAN parameter and set to i) TRUE if the RAN parameter is of the second type, or ii) set to FALSE if the RAN parameter is of the first type.
8 . The method of claim 1 , wherein the generic encoding mechanism provides a recursive encoding structure enabling control of any RAN parameter within any hierarchical level of nesting in 3GPP-defined parameter structures.
9 . The method of claim 8 , wherein: the method enables exchange of any RAN parameter between the O-RAN node and the near-RT RIC; and the exchanged RAN parameter is controlled from the near-RT RIC.
10 . The method of claim 9 , wherein the method is compliant with O-RAN standards for E2 Service Model-RAN Control (E2SM-RC) service model.
11 . The method of claim 10 , wherein the E2SM-RC service model is used for at least one of the following O-RAN functionalities:
traffic steering; quality of service (QOS); quality of experience (QoE);
multiple input multiple output (MIMO) beamforming; and slicing.
12 . The method of claim 9 , wherein the generic encoding mechanism includes a second categorization of each RAN parameter between i) a first type in which the value of the RAN parameter is directly controlled by the near-RT RIC, and ii) a second type in which the value of the RAN parameter serves as an index for the O-RAN node to further point to other RAN parameters.
13 . The method of claim 12 , wherein: for the purpose of distinguishing the ELEMENT type RAN parameter between the first type and the second type, a Boolean key flag is associated with every ELEMENT type RAN parameter and set to i) TRUE if the RAN parameter is of the second type, or ii) set to FALSE if the RAN parameter is of the first type.