Method and apparatus for controlling the total overhead used to transmit channel state information in a wireless network

摘要

An amount of total overhead allocated by a wireless system for transmitting channel state information by a plurality of mobile stations serviced by the wireless system can be controlled by allocating a reporting interval, reporting size and subset of subcarriers to each of the mobile stations for use by the mobile stations in reporting channel state information on the subcarriers included in the subset allocated to the respective mobile stations. At least one of the reporting interval, reporting size and subset of subcarriers allocated to one or more of the mobile stations is modified as a function of the number of mobile stations reporting channel state information so that the total overhead allocated for transmitting the channel state information on all of the subcarriers remains generally constant regardless of the number of mobile stations reporting channel state information.

主权项

1. A method of controlling an amount of total overhead allocated by a wireless system for transmitting channel state information by a plurality of mobile stations serviced by the wireless system, comprising:
allocating a subset of available subcarriers to each of the mobile stations for use by the mobile stations; allocating the same fixed reporting interval and the same fixed reporting size to each of the mobile stations; for each of the mobile stations, receiving channel state information on the subcarriers in the subset allocated to that mobile station; modifying the subset of subcarriers allocated to each of one or more of the mobile stations as a function of the number of mobile stations reporting channel state information so that the total overhead allocated for transmitting the channel state information on all of the subcarriers remains generally constant regardless of the number of mobile stations reporting channel state information; and wherein the number of subcarriers included in each of the subsets is a function of the total overhead, the fixed reporting interval, the fixed reporting size and the number of mobile stations serviced by the wireless system.