DYNAMIC SCHEDULING OF NON-INTERFERING CLUSTERS IN A DISTRIBUTED DIVERSITY COMMUNICATIONS SYSTEM

摘要

In certain embodiments, a cellular wireless communications network has clusters, each cluster having a plurality of cells and a cluster-level controller that dynamically divides the cluster into non-interfering sub-clusters for each resource allocation unit (e.g., physical resource block) . Each sub-cluster has one or more cells that transmit to a single user in the cluster for the resource allocation unit, and at least one sub-cluster has at least two cells that transmit to a single user for the resource allocation unit using a distributed diversity mode of communication in which the at least two cells transmit the same data to the single user. The controller divides the cluster into sub-clusters based on determinations of whether users in the cluster are susceptible to interference from non-serving cells in the cluster. By assigning potentially interfering, non-serving cells to the sub-cluster for a user, those non-serving cells are eliminated as sources of interference.

主权项

1. A cellular wireless communications network comprising one or more clusters, each cluster comprising:
a plurality of cells; and a cluster-level controller that dynamically divides the cluster into a set of non-interfering sub-clusters for a resource allocation unit, wherein:
each sub-cluster comprises one or more cells that transmit to a single user in the cluster for the resource allocation unit;at least one sub-cluster comprises at least two cells that transmit to a corresponding single user in the cluster for the resource allocation unit;the controller dynamically divides the cluster into the set of non-interfering sub-clusters based on a cluster-level ranking of users in the cluster;each user in the cluster is connected to only one serving cell in the cluster; andfor a highest-rank user in the ranking, the controller defines a sub-cluster for the highest-rank user, wherein:
if the controller determines that the highest-rank user has one or more potentially interfering, non-server cells in the duster, then the controller includes in the sub-cluster for the highest-rank user (i) the one or more potentially interfering, non-serving cells and (ii) the serving, cell for the highest-rank user; andif the controller determines that the highest-rank user has no potentially interfering, non-server cells in the cluster, then the controller includes in the sub-cluster for the highest-rank user only the serving cell for the highest-rank user.