Communications system with multiple PDCCH with associated multiple DMRS patterns

摘要

A communication system is presented in which a base station is provided for communicating with a plurality of mobile communication devices in a cellular communication system. The base station operates one of more communication cells and communicates subframes, with each of the plurality of communication devices within the cell(s), each comprising the communication resources of a control region for communicating a control channel and the communication resources of a data region for communicating a respective data channel. The base station communicates a control channel having a first DMRS sequence in a control region of some subframes and a control channel having a second DMRS sequence in a control region of other subframes. The second control channel may be transmitted in a radio beam focussed spatially in a direction of a communication device. The first control channel may be transmitted omnidirectionally throughout the cell(s).

主权项

1. Communication apparatus for communicating with a plurality of mobile communication devices in a cellular communication system said communication apparatus comprising:
a controller configured to operate at least one communication cell; a transceiver configured to communicate via a plurality of antenna ports with each of a plurality of communication devices within said at least one cell, wherein: said transceiver uses a plurality of communication resources for a respective physical downlink control channel (PDCCH), and a plurality of communication resources for a physical downlink shared channel (PDSCH); and said transceiver is configured to communicate:
control information in a second PDCCH, wherein said control information in said second PDCCH is communicated using a first pair of antenna ports associated with a first demodulation reference signal (DMRS) pattern and a second pair of antenna ports associated with a different DMRS pattern.