Apple Inc. (Cupertino, CA)
What is a Patent for Listen-before-talk devices, systems and methods that are based on intra-device operations
The present disclosure relates generally to electronic devices and, more specifically, to electronic devices that utilize radio frequency signals, transmitters, and receivers to transmit wireless signals.
This section is designed to provide the reader with a basic understanding of various aspects of art that could be relevant to different aspects of the present disclosure which are described and/or claimed below. This section will provide background information that could be used to aid the reader to be aware of the various aspects of the disclosure. In this regard, it should be understood that these statements should be interpreted in this manner and not as an admission of prior art.
The use of wireless communications systems is rapidly increasing. In recent times mobile devices like smartphones and tablet computers have become more sophisticated. In addition to supporting telephone calls, many smartphones offer internet access as well as email, text messaging and navigation via the global positioning system (GPS) and have the capability of running sophisticated software that makes use of these functionalities.
Receivers and transmitters can be added to many electronic devices in order to allow the communication between devices. A variety of electronic devices can communicate at least in part simultaneously in a same room and/or region. However, overlappingcommunications may increase a chance of interference between concurrent communications affecting a quality or success of one or more of the communications.
A computer can detect the radio waves in order to reduce interference between communications. It could also ensure whether there aren’t any ongoing communications. An electronic device can compare the received noise with a threshold level of noise, and then decide to defer communication if received noise is higher than that threshold. This is often referred to as Listen-before Talk (LBT), operation. The listen-before talk operation may comprise an electronic device that verifies that the amount of noise generated by one or more antennas is lower than a threshold. This is to make sure that every antenna is free of interference prior to transmitting data packets to a different electronic device. Although these techniques allow transmission when each antenna is receiving less than thethreshold amount of noise, they will also block transmission from an antenna which receives less than the threshold amount of noise if another antenna receives more noise than the threshold amount. This means that if an antenna senses the energy level (e.g. receives the sound) then it won’t be allowed to transmit. This”all or nothing” approach may drastically reduce efficiencies ofoperation as the amount of noise that is detected at an antenna is thought to affect other antennas and thus preventing transmission by all antennas even if certain antennas are receiving amounts of noise less than the threshold amount of noise.
Various refinements of the features noted above may be found in connection with different aspects of the disclosed disclosure. Additional features could be included in these different aspects as well. These features and refinements may existindividually or in any combination. You can, for example, incorporate various features described below with respect to any of the depicted embodiments into every aspect of the present disclosure. This brief summary is meant to provide a concise overview of certain aspects and contexts for the embodiments described in this disclosure without limiting the claims.Click here to view the patent on USPTO website.
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2. These terms will let you search for pertinent Cooperative Patent Classifications on the Classification Search Tool. If you’re unable to locate the appropriate classification for your invention, scan through the class Schemas (class schedules). If you don’t see any results using the Classification Text Search, you may want to consider replacing the words that describe your invention with synonyms.
3. Check 3. Check the CPC Classification Definition to confirm the validity of the CPC classification you have found. If the selected classification title includes a blue square with an “D” at its left, the hyperlink will take you to the CPC classification definition. CPC classification definitions can aid you in determining the classification’s purpose so that you can choose the one that is most appropriate. In addition, these definitions can include some tips for searching and other information that could be useful to further study.
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7. Find additional US patents by keyword searching in PatFT or AppFT databases, classification searching of non-U.S. patents as per below, and also searching non-patent patent disclosures in the literature of inventions using internet search engines. For example:
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