Nokia Technologies Oy

Nokia Siemens Networks Oy

Andrei Malkov

Shaohua Li

Zexian Li

Cassio Ribeiro

Antti Sorri

Xin Qi

Enrico Rantala

Jian Feng Kang

Joon Hwa Chun

Shu Shaw Wang

In a non-limiting and example embodiment, a method is provided for controlling usage of prioritized radio channels, comprising: detecting (), by a secondary user apparatus, an interference limitation of a first radio channel for which a primary user apparatus has priority over the secondary user apparatus, selecting (), by the secondary user apparatus, the first radio channel for communication with another apparatus to a first direction after detecting the interference limitation, and selecting (), by the secondary user apparatus, a second radio channel for communication with the other apparatus to a second direction, opposite to the first direction.

Method and apparatus for using radio channels

According to an example embodiment, a method may include allocating, within a single physical resource unit (PRU), a plurality of channel sounding groups. Wherein each channel sounding group includes a frequency-time domain code division multiplexing (CDM) allocation. The method may also include broadcasting, in a downlink direction to one or more mobile stations in a wireless network, a signal that causes the receiving mobile stations to transmit a channel sounding signal. The method may further include receiving at least one channel sounding signal from at least one of the one or more mobile stations, the channel sounding signal being received in an uplink direction via one or more channel sounding groups. And, the method may include estimating the channel quality, of the channel used by the physical resource unit, based upon the received at least one channel sounding signal.

Sounding channel apparatus and method

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Muurla, Finland

Andrei Malkov