Rank Adaptation for an Open Loop Multi-Antenna Mode of Wireless Communication
First Claim
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1. A method of performing rank adaptation for a mobile station in a wireless network, comprising:
- determining a velocity of the mobile station;
in response to determining that the velocity of the mobile station is above the predefined threshold, selecting an open loop multi-antenna mode to perform wireless communication between the mobile station and the base station; and
selecting from among plural ranks for the wireless communication according to the open loop multi-antenna mode between the mobile station and the base station.
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Abstract
To perform rank adaptation for a mobile station in a wireless network, it is determined whether the mobile station is fast moving. In response to determining that the mobile station is fast moving, an open loop multi-antenna mode is selected to perform wireless communication between the mobile station and a base station. Also, selection is made from among plural ranks for the wireless communication according to the open loop multi-antenna mode between the mobile station and the base station.
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Citations
20 Claims
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1. A method of performing rank adaptation for a mobile station in a wireless network, comprising:
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determining a velocity of the mobile station; in response to determining that the velocity of the mobile station is above the predefined threshold, selecting an open loop multi-antenna mode to perform wireless communication between the mobile station and the base station; and selecting from among plural ranks for the wireless communication according to the open loop multi-antenna mode between the mobile station and the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A base station comprising:
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an interface to perform wireless communication with a mobile station; and a processor to; determine whether the mobile station is a high-velocity mobile station; in response to determining that the mobile station is a high-velocity mobile station, select a multi-antenna mode of communication for downlink data transmitted to the mobile station that does not involve feedback from the mobile station that includes an identifier of a codeword to be used for coding the downlink data; and apply rank adaptation to select from among a plurality of ranks for the communication of downlink data according to the multi-antenna mode of communication. - View Dependent Claims (15, 16, 17, 18, 20)
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19. A mobile station comprising:
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an interface to perform wireless communication with a base station; and a processor to; determine whether a velocity of the mobile station exceeds a predefined threshold; in response to determining that the velocity of the mobile station exceeds the predefined threshold, select an open loop multiple input multiple output (MIMO) mode to perform wireless communication between the mobile station and the base station; and use rank adaptation to select from among plural ranks in the wireless communication according to the open loop MIMO mode.
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Specification