US Patent 9210673 Recovery from uplink timing alignment failures in cellular communications
Patent 9210673 was granted and assigned to Apple (company) on December, 2015 by the United States Patent and Trademark Office.
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Regaining uplink synchronization after timing alignment failure in cellular communications. An out-of-sync condition with a cellular network may be detected. A first type of random access procedure may be initiated in response to detecting the out-of-sync condition. It may be determined whether or not a message transmitted as part of the first type of random access procedure is received by the cellular network. If the message transmitted as part of the first type of RACH is received by the network and no response to the message is received from the cellular network, a second type of RACH may be initiated. The second type of RACH may include a message having an indication that an out-of-sync condition occurred.
US Patent 09210673 Recovery from uplink timing alignment failures in cellular communications US Patent 9210673 Recovery from uplink timing alignment failures in cellular communications
US Patent 09210673 Recovery from uplink timing alignment failures in cellular communications
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