Timing advance enhancements for cellular communications
First Claim
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1. A method comprising:
- when a device is operating in a stationary mode and before a need of the device to communicate data, determining whether a stored timing advance is valid, wherein determining whether the stored timing advance is valid includes determining if a pre-determined time interval has elapsed since a last successful data transfer, whether a pre-determined number of attempts to access a network have failed when the device is in the stationary mode, and whether the device has moved; and
in response to the stored timing advance being invalid, transmitting an access burst over a random access channel to determine a valid timing advance before the need of the device to communicate the data.
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Abstract
A disclosed example method involves, when a device is operating in a stationary mode and before a need of the device to communicate data, determining whether a stored timing advance is valid. When the stored timing advance is not valid, a valid timing advance is determined before the need of the device to communicate the data.
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Citations
9 Claims
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1. A method comprising:
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when a device is operating in a stationary mode and before a need of the device to communicate data, determining whether a stored timing advance is valid, wherein determining whether the stored timing advance is valid includes determining if a pre-determined time interval has elapsed since a last successful data transfer, whether a pre-determined number of attempts to access a network have failed when the device is in the stationary mode, and whether the device has moved; and in response to the stored timing advance being invalid, transmitting an access burst over a random access channel to determine a valid timing advance before the need of the device to communicate the data. - View Dependent Claims (2, 3)
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4. An apparatus comprising:
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a processor configured to; when a device is operating in a stationary mode and before a need of the device to communicate data, determine whether a stored timing advance is valid, wherein determining whether the stored timing advance is valid includes determining if a pre-determined time interval has elapsed since a last successful data transfer, whether a pre-determined number of attempts to access a network have failed when the device is in the stationary mode, and whether the device has moved; and in response to the stored timing advance being invalid, transmit an access burst over a random access channel to determine a valid timing advance before the need of the device to communicate the data. - View Dependent Claims (5, 6)
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7. A computer readable storage memory having instructions stored thereon that, when executed, cause a machine to at least:
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when a device is operating in a stationary mode and before a need of the device to communicate data, determine whether a stored timing advance is valid, wherein determining whether the stored timing advance is valid includes determining if a pre-determined time interval has elapsed since a last successful data transfer, whether a pre-determined number of attempts to access a network have failed when the device is in the stationary mode, and whether the device has moved; and in response to the stored timing advance being invalid, transmit an access burst over a random access channel to determine a valid timing advance before the need of the device to communicate the data. - View Dependent Claims (8, 9)
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Specification