Patent ID: 8693441
Filing Date: 2014-04-08
Classification: H04B

Abstract:
1. A method for feeding back multi-cell channel state information in a network, the method comprising: feeding back, by a user equipment, channel state information of a serving cell of the user equipment to a network device; exchanging, by the user equipment, long-term wideband space state information of a neighboring cell of the user equipment with the network device; obtaining, by the user equipment, an inter-cell additional information of the neighboring cell; selecting, by the user equipment, a code word that optimizes joint channel information, from a codebook of the inter-cell additional information; and feeding back, by the user equipment, inter-cell additional information of the neighboring cell to the network device, wherein the inter-cell additional information of the neighboring cell comprises the code word that optimizes the joint channel information, so that the network generates the optimal joint channel information according to the channel state information of the serving cell, the long-term wideband space state information of the neighboring cell, and the code word that optimizes the joint channel information, wherein the optimal joint channel information is minimum cosine distance or Euclidean distance from ideal channel information, maximum receive signal noise ratio, or maximum receive signal power.