Patent ID: 9520922
Filing Date: 2016-12-13
CPC Classification: H04B,Y02D

Claim Text:
1. A method for obtaining downlink channel quality information, the method comprising: obtaining, by a transmission node in a cooperative node set, a received noise power of a user equipment, and obtaining, by the transmission node in the cooperative node set, a power of interference to the user equipment from a node in a non-cooperative node set; obtaining, by the transmission node in the cooperative node set, an inter-user interference power during a multi-user scheduling of the transmission node in the cooperative node set, and a power of useful signal received at the user equipment; obtaining, by the transmission node in the cooperative node set, a power of interference to the user equipment from a non-transmission node in the cooperative node set, by interacting with the non-transmission node in the cooperative node set; and calculating a ratio of the power of received useful signal to a sum of an interference source power and the received noise power of the user equipment, the ratio being taken as a value of the downlink channel quality information (CQI) of a downlink channel between the transmission node and the user equipment, wherein the interference source power comprises the inter-user interference power during the multi-user scheduling of the transmission node in the cooperative node set, the power of interference to the user equipment from the node in the non-cooperative node set, and the power of interference to the user equipment from the non-transmission node in the cooperative node set.