Downlink channel quality information acquisition method and device

摘要

A downlink channel quality information acquisition method includes: a transmission node in a coordinated node set acquires the noise receiving power of a user equipment (UE11) and the interference power on the UE11 of a node in a non-coordinated set; the transmission node in the coordinated node set acquires, via the transmission node in the coordinated node set, an inter-user interference power during the multi-user scheduling and the effective signal receiving power of the UE11; the transmission node in the coordinated node set acquires the interference power on the UE11 of a non-transmission node in the coordinated set; calculating the ratio between the effective signal receiving power and the sum of an interference source power and the noise receiving power of the UE11, and using the ratio as the value of the downlink CQI between the transmission node and the UE11.

主权项

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.