Methods and apparatus for adaptive receiver diversity in a wireless network
AssigneeApple Inc.
InventorsSyed Aon Mujtaba, Xiaowen Wang, Tarik Tabet, Kee-Bong Song, Youngjae Kim, Yuchul Kim
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Abstract
Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.
Claims16
A mobile apparatus configured to implement adaptive receive diversity, the apparatus including:
- a processor;
- one or more wireless receivers configured to operate in at least a first and second diversity modes, wherein the first diversity mode uses a first diversity-enabled scheme supporting a first data capacity and the second diversity mode uses a second diversity-enabled scheme supporting a second data capacity;
- and
- computerized logic in data communication with the processor and one or more wireless receivers, and configured to cause the mobile apparatus to:
- evaluate a capacity condition and a connectivity condition;
- when the capacity condition and the connectivity condition are met, operate in the first diversity mode;
- and
- when either the capacity condition or the connectivity condition are not met, operate in the second diversity mode.
A method for intelligently performing adaptive receive diversity, the method including:
- determining (i) a connectivity criterion and (ii) a capacity criterion;
- communicating via a wireless receiver, the wireless receiver configurable in at least a first diversity-enabled scheme and a second diversity-enabled scheme;
- where the first diversity-enabled scheme can support more data capacity than the second diversity-enabled scheme;
- comparing a current signal quality measurement to a capacity condition;
- comparing a current connection quality to a connectivity condition;
- when operating in the first diversity-enabled scheme:
- when the current signal quality measurement satisfies the capacity condition and the current connection quality satisfies the connectivity condition, transitioning to the second diversity-enabled scheme;
- and
- when operating in the second diversity-enabled scheme:
- when either the current signal quality measurement does not satisfy the capacity condition or the current connection quality does not satisfy the connectivity condition, transitioning to the first diversity-enabled scheme.
A method for dynamically overriding a rank instruction, the method including:
- communicating via a wireless receiver, the wireless receiver configured to select at least a first diversity-enabled scheme and a second diversity-enabled scheme based on a rank indication signal received from a wireless transmitter and an override signal;
- where the first diversity-enabled scheme can support more data capacity than the second diversity-enabled scheme;
- comparing a current signal quality measurement to a capacity condition;
- comparing a current connection quality to a connectivity condition;
- when the current signal quality measurement satisfies the capacity condition and the current connection quality satisfies the connectivity condition, enabling the override signal to select the second diversity-enabled scheme;
- and
- otherwise selecting a diversity-enabled scheme identified by the rank indication signal.
Dependencies are inferred from the claim text.