Spectrum access optimization for self organizing networks
Improved techniques are provided for managing and optimizing network resources and spectrum access in a Self-Organizing Network (SON). A Spectrum Access System (SAS) collects network-related information from a plurality of network sources, such as base stations and user equipments (UEs), to perform optimization and organization across different networks, network operators, and network technologies. In some embodiments, the SAS may use the network information and a Radio Environment Map to optimize TDD synchronization in the SON. In other embodiments, the SAS may use the network information to populate a global Neighbor Relation Table. The SAS also may use the network information to optimize one or more network parameters, such as Physical Cell Identities or Root Sequence Indexes, antenna parameters, transmit power levels, handover thresholds, channel assignments, and so on, for use in the SON. Advantageously, the SAS's optimized network parameters may be used to improve network performance, reduce signal interference, and adjust to network failures in the SON.
1. A method for optimizing time division duplexing (TDD) synchronization, comprising:
identifying, by a Spectrum Access System (SAS), a first group of one or more networks and a second group of one or more networks, wherein the first group of one or more networks comprises a first set of base stations and the second group of one or more networks comprises a second set of base stations;
determining, by the SAS, a first frame structure having one or more subframes associated with the first group of one or more networks;
determining, by the SAS, a second frame structure having one or more subframes associated with the second group of one or more networks;
determining, by the SAS, a number of mismatched subframes between the first and second frame structures; and
separating, by the SAS, frequency channels assigned to the first group of one or more networks and the second group of one or more networks based on the number of mismatched subframes between the first and second frame structures.
2. The method of claim 1 , wherein the first and second frame structures correspond to different TDD configurations.
3. The method of claim 1 , wherein the same frequency channel is assigned to the first and second groups of networks if the number of mismatched subframes is less than a predetermined threshold value.
4. The method of claim 1 , further comprising identifying the first group of one or more networks based on at least one of a Radio Environment Map, expected traffic demand, timing capability, or air interface technology associated with the first group of one or more networks.
5. The method of claim 1 , further comprising identifying the second group of one or more networks based on at least one of a Radio Environment Map, expected traffic demand, timing capability, or air interface technology associated with the second group of one or more networks.