Uplink resynchronization for use in communication system
First Claim
Patent Images
1. A method comprising:
- operating, in a Long Term Evolution (LTE) mobile device, a time alignment timer to maintain uplink time alignment;
receiving a configuration of a physical uplink control channel (PUCCH), wherein the configuration identifies a PUCCH resource;
transmitting uplink transmissions using the PUCCH resource;
after expiration of the time alignment timer, releasing PUCCH resources and maintaining the configuration of the PUCCH resource;
subsequently re-synchronizing uplink time alignment; and
after re-synchronizing uplink time alignment, determining whether the PUCCH resource is still available for further uplink transmissions.
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Accused Products
Abstract
A method and apparatus for reusing an uplink control channel configuration associated with an uplink control channel, the method comprising the steps of, at a user agent, receiving an uplink control channel resource configuration assigned by an access device, transmitting to the access device using the control channel resources associated with the received uplink control channel resource configuration and, after a time alignment timer expires, retaining the uplink control channel resource configuration.
24 Citations
19 Claims
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1. A method comprising:
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operating, in a Long Term Evolution (LTE) mobile device, a time alignment timer to maintain uplink time alignment; receiving a configuration of a physical uplink control channel (PUCCH), wherein the configuration identifies a PUCCH resource; transmitting uplink transmissions using the PUCCH resource; after expiration of the time alignment timer, releasing PUCCH resources and maintaining the configuration of the PUCCH resource; subsequently re-synchronizing uplink time alignment; and after re-synchronizing uplink time alignment, determining whether the PUCCH resource is still available for further uplink transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A Long Term Evolution (LTE) wireless device comprising:
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a processor; a transmitter linked to the processor; and a receiver linked to the processor, wherein the processor is programmed to; operate a time alignment timer to maintain uplink time alignment; receive a configuration of a physical uplink control channel (PUCCH) resource, wherein the configuration identifies an uplink resource; transmit uplink transmissions using the PUCCH resource; after expiration of the time alignment timer, release PUCCH resources and maintain the configuration of the PUCCH resource; and subsequently re-synchronize uplink time alignment; and after re-synchronizing uplink time alignment, determine whether the PUCCH resource is still available for further uplink transmissions. - View Dependent Claims (12, 13, 14)
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15. A non-transitory computer-readable medium comprising software, which, when executed by a processor, causes the processor to:
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operating, in a Long Term Evolution (LTE) mobile device, a time alignment timer to maintain uplink time alignment; receive a configuration of a physical uplink control channel (PUCCH) resource, wherein the configuration identifies an uplink resource; transmit uplink transmissions using the PUCCH resource; after expiration of the time alignment timer, release PUCCH resources and maintain the configuration of the PUCCH resource notwithstanding expiration of the time alignment timer; and subsequently re-synchronize uplink time alignment; and after re-synchronizing uplink time alignment, determine whether the PUCCH resource is available for further uplink transmissions.
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16. A method comprising:
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allocating a Physical Uplink Control Channel (PUCCH) resource to a wireless device; sending a PUCCH resource configuration to the wireless device; transmitting one or more time advance commands to the wireless device to control a time alignment timer in the wireless device; receiving uplink transmissions from the wireless device over the PUCCH resource; receiving an uplink transmission request after the time alignment timer has expired; and sending an indication that the PUCCH resource configuration is still available. - View Dependent Claims (17, 18, 19)
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Specification