Channel rank updates in multiple-input multiple-output communication system
AssigneeApple Inc.
InventorJayesh Kotecha
Life of this patent
Estimating the term…
Abstract
Embodiments of the disclosure provide a system and method for providing channel feedback information (CFI) from a user equipment device to a base station. CFI is transmitted from the user equipment device on first and second communication channels. The user equipment device is operable to measure the channel rank of a downlink channel and to select a preferred channel rank that is used to configure the CFI that is transmitted to the base station. The base station is operable to use the preferred channel rank to interpret the CFI transmitted by the user end device.
Claims19
An apparatus comprising:
- channel feedback report circuitry configured to generate a first set of measured channel feedback information (CFI), including a first measured rank, and a second set of measured CFI, including a second measured rank, wherein the second measured rank corresponds to a different feedback type than the first measured rank;
- processing logic configured to, in response to determining that the first measured rank and second measured rank are different, select one of the first measured rank or the second measured rank based on respective values of the first and second measured ranks;
- and
- transmission circuitry configured to transmit a periodic CFI report that is generated based on the selected measured rank on a first communication channel, and to transmit an aperiodic CFI report that is generated based on the selected measured rank on a second, different communication channel.
A non-transitory computer-readable medium having instructions stored thereon that are executable by a computing device to perform operations comprising:
- generating a first set of measured channel feedback information (CFI), including a first measured rank, and a second set of measured CFI, including a second measured rank, wherein the second measured rank corresponds to a different feedback type than the first measured rank;
- in response to determining that the first measured rank and second measured rank are different, selecting one of the first measured rank or the second measured rank based on respective values of the first and second measured ranks;
- and
- transmitting a periodic CFI report that is generated based on the selected measured rank on a first communication channel and transmitting an aperiodic CFI report that is generated based on the selected measured rank on a second, different communication channel.
A mobile device, comprising:
- one or more antennas
- a radio configured to wirelessly communicate via at least a portion of the one or more antennas;
- and
- one or more processors configured to:
- generate a first set of measured channel feedback information (CFI), including a first measured rank, and a second set of measured CFI, including a second measured rank, wherein the second measured rank corresponds to a different feedback type than the first measured rank;
- in response to determining that the first measured rank and second measured rank are different, select one of the first measured rank or the second measured rank based on respective values of the first and second measured ranks;
- and
- transmit a periodic CFI report that is generated based on the selected measured rank on a first communication channel and transmit an aperiodic CFI report that is generated based on the selected measured rank on a second, different communication channel.
Dependencies are inferred from the claim text.