Network assisted interference cancellation and suppression with respect to interfering control channel transmissions
Embodiments of the present disclosure describe systems and methods for mitigating interference in wireless networks. Various embodiments may include signaling of control channel information associated with an interfering cell and utilization of the control channel information to mitigate interference. Other embodiments may be described and/or claimed.
1. An apparatus comprising:
communications circuitry to receive, from an access node using radio resource control signals, power boosting information comprising one or more boosting values related to control channels of serving and interfering cells, wherein the one or more boosting values include energy per resource element (EPRE) ratios between a physical downlink control channel (PDCCH)/enhanced physical downlink control channel (EPDCCH) and reference signals of the PDCCH/EPDCCH for both the serving and interfering cells; and
receiver circuitry coupled with the communications circuitry, the receiver circuitry to:
determine an extended quadrature phase shift keying (QPSK) constellation based on the power boosting information for selection of desired combinations of the PDCCH/EPDCCH from the serving and interfering cells, wherein the QPSK constellation is to indicate possible signal points that can be used on the serving and interfering cells given the power boosting information relative to the reference signals of the PDCCH/EPDCCH; and
jointly decode serving and interfering control channels based on the extended QPSK constellation, wherein to jointly decode, the receiver circuitry is to use a decoding algorithm to perform a search over discrete signals of the extended QPSK constellation for the serving and interfering cells.
2. The apparatus of claim 1 , wherein, to jointly decode the serving and interfering control channels, the receiver circuitry is to:
estimate an interference profile associated with the interfering control channel; and
process a received signal based on the interference profile.
3. The apparatus of claim 1 , wherein, to jointly decode the serving and interfering control channels, the receiver circuitry is to:
utilize a maximum likelihood decoding algorithm to perform a search over discrete signals of the extended QPSK constellation for serving and interfering signals.
4. The apparatus of claim 1 , wherein, to receive the power boosting information, the communications circuitry is to:
receive, from a serving access node, a power boosting set, having one or more boosting values, for the PDCCH/EPDCCH, physical hybrid automatic repeat request indicator channel (PHICH), and/or physical control format indicator channel (PCFICH) of the serving cell, and a power boosting set for the PDCCH/EPDCCH, PHICH, and/or PCFICH of the interfering cell.
5. The apparatus of claim 1 , wherein the boosting information includes a first boosting set for a first orthogonal frequency division multiplexing (OFDM) symbol of a control region and a second boosting set for a second OFDM symbol of the control region.
6. A user equipment comprising:
a multi-mode baseband circuitry including:
first circuitry having the apparatus of claim 1 to communicate with a radio access network that utilizes a long term evolution (LTE) protocol; and
second circuitry to communicate with a wireless network that utilizes a wireless protocol that is different from the LTE protocol.
7. The apparatus of claim 1 , wherein the power boosting information is to provide an indication that a power level used in control channel transmissions is increased relative to other control channel transmissions.