Device of Handling Periodic CSI Report

Abstract

A communication device for handling periodic channel state information (CSI) reports comprises a storage unit for storing instructions and a processing means coupled to the storage unit. The processing means is configured to execute the instructions stored in the storage unit. The instructions comprise determining at least one field difference between a reference CSI report and at least one periodic CSI report, wherein the at least one periodic CSI report corresponds to at least one component carrier, respectively; transmitting the reference CSI report to a network; and transmitting the at least one field difference to the network.

What is claimed is: 
     
         1 . A communication device for handling periodic channel state information (CSI) reports, comprising:
 a storage unit for storing instructions of:   determining at least one field difference between a reference CSI report and at least one periodic CSI report, wherein the at least one periodic CSI report corresponds to at least one component carrier, respectively;   transmitting the reference CSI report to a network; and   transmitting the at least one field difference to the network; and   a processing means, coupled to the storage unit, configured to execute the instructions stored in the storage unit.   
     
     
         2 . The communication device of  claim 1 , wherein each of the at least one periodic CSI report comprises at least one field which comprises at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI), a Rank Indicator (RI) and a Precoder Type Indicator (PTI). 
     
     
         3 . The communication device of  claim 1 , wherein the instruction of transmitting the at least one field difference to the network further comprises:
 determining at least one value corresponding to the at least one field difference according to a predetermined table; and   transmitting the at least one value to the network.   
     
     
         4 . The communication device of  claim 1 , wherein each of the at least one value is represented by at least one bit. 
     
     
         5 . A communication device for handling a periodic channel state information (CSI) report, comprising:
 a storage unit for storing instructions of:   omitting at least one field in a periodic CSI report corresponding to a component carrier, when the periodic CSI report collides with another CSI report; and   transmitting the periodic CSI report to a network; and   a processing means, coupled to the storage unit, configured to execute the instructions stored in the storage unit.   
     
     
         6 . The communication device of  claim 5 , wherein the network determines that the at least one field is the same as at least one corresponding field in a reference CSI report. 
     
     
         7 . The communication device of  claim 6 , wherein the reference CSI report is transmitted to the network, before transmitting the periodic CSI report to the network. 
     
     
         8 . The communication device of  claim 5 , wherein the at least one field comprises at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI), a Rank Indicator (RI) and a Precoder Type Indicator (PTI) in the periodic CSI report. 
     
     
         9 . A communication device for handling periodic channel state information (CSI) reports, comprising:
 a storage unit for storing instructions of:   dropping at least one first periodic CSI report, when the at least one first periodic CSI report collides with at least one second periodic CSI report, wherein the at least one first periodic CSI report and the at least one second periodic CSI report correspond to a plurality of component carriers, respectively; and   transmitting the at least one second periodic CSI report to a network;   transmitting an indicator to the network, wherein the indicator indicates which CSI report is dropped or which CSI report is transmitted; and   a processing means, coupled to the storage unit, configured to execute the instructions stored in the storage unit.   
     
     
         10 . The communication device of  claim 9 , wherein each of the at least one first CSI report and the at least one second CSI report comprises at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI), a Rank Indicator (RI) and a Precoder Type Indicator (PTI). 
     
     
         11 . The communication device of  claim 9 , wherein the indicator comprises at least one identity corresponding to the at least one first periodic CSI report or the at least one second periodic CSI report. 
     
     
         12 . The communication device of  claim 9 , wherein the at least one first periodic CSI report collides with the at least one second periodic CSI report, when the at least one first periodic CSI report collides with the at least one second periodic CSI report are scheduled to be transmitted via the same resource.