Uplink timing control

A wireless communications apparatus, comprising:

• a memory that retains instructions for:
• entering a sleep mode;
• waking from the sleep mode after a predetermined period of time passes;
• signaling uplink information, the uplink information providing an uplink timing of the wireless communications apparatus;
• determining whether a timing adjustment command has issued, wherein the issuance of the timing adjustment command is based on properties of the wireless communications apparatus;
• adjusting the uplink timing based on the issued timing adjustment command when a timing adjustment command is determined to have issued;
• and reentering the sleep mode without the adjusting when no timing adjustment command is determined to have issued;
• wherein the properties of the wireless communications apparatus comprise at least one of a velocity of the wireless communications apparatus and a current synchronization timing of the wireless communications apparatus;
• and a processor coupled to the memory configured to execute the instructions retained in the memory.

A wireless communications apparatus that facilitates conserving power when acquiring a time adjustment, comprising:

• means for entering a sleep mode;
• means for waking from the sleep mode after a predetermined period of time passes;
• means for signaling uplink information, the uplink information providing an uplink timing of the wireless communications apparatus;
• means for determining whether a timing adjustment command has issued, wherein the issuance of the timing adjustment command is based on properties of the wireless communications apparatus;
• means for adjusting the uplink timing based on the issued timing adjustment command when a timing adjustment command is determined to have issued;
• and
• means for reentering the sleep mode without the adjusting when no timing adjustment command is determined to have issued;
• wherein the properties of the wireless communications apparatus comprise at least one of a velocity of the wireless communications apparatus and a current synchronization timing of the wireless communications apparatus.

A computer program product stored on a non-transitory computer-readable medium, comprising code for:

• entering a sleep mode;
• waking from the sleep mode after a predetermined period of time passes;
• signaling uplink information, the uplink information providing an uplink timing of a user equipment (UE);
• determining whether a timing adjustment command has issued, wherein the issuance of the timing adjustment command is based on properties of the wireless communications apparatus;
• adjusting the uplink timing based on the issued timing adjustment command when a timing adjustment command is determined to have issued;
• and
• reentering the sleep mode without the adjusting when no timing adjustment command is determined to have issued;
• wherein the properties of the wireless communications apparatus comprise at least one of a velocity of the wireless communications apparatus and a current synchronization timing of the wireless communications apparatus.

In a wireless communication system, an apparatus comprising an integrated circuit configured to:

• place the apparatus in a sleep mode;
• wake the apparatus from the sleep mode after a predetermined period of time passes;
• signal uplink information at the apparatus, the uplink information providing an uplink timing of the apparatus;
• determine whether a timing adjustment command has issued, wherein the issuance of the timing adjustment command is based on properties of the wireless communication system;
• adjust the uplink timing at the apparatus based on the issued timing adjustment command when a timing adjustment command is determined to have issued;
• and
• reenter the sleep mode without the adjusting when no timing adjustment command is determined to have issued;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE.

A method for updating timing, comprising:

• receiving, at a base station, a transmission from a waking user equipment (UE), the transmission including uplink information, the uplink information including an uplink timing of the UE;
• determining, at the base station, that the waking UE requires a timing update based upon the uplink information;
• calculating a timing adjustment, at the base station, for the waking UE when it is determined that waking UE requires a timing update;
• and
• issuing a timing adjustment command, from the base station, to the waking UE, on a per need basis, when it is determined that the waking UE requires a timing update, wherein the issuance of the timing adjustment command is based on properties of the UE;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE.

A wireless communications apparatus, comprising:

• a memory that retains instructions for:
• receiving a transmission from a waking user equipment (UE), the transmission including uplink information, the uplink information including an uplink timing of the UE;
• determining that the waking UE requires a timing update based upon the uplink information;
• calculating a timing adjustment for the waking UE when it is determined that the waking UE requires a timing update;
• and
• issuing a timing adjustment command to the waking UE, on a per need basis, when it is determined that the waking UE requires a timing update, wherein the issuance of the timing adjustment command is based on properties of the UE;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE;
• and a processor coupled to the memory configured to execute the instructions retained in the memory.

A wireless communications apparatus that facilitates updating timing with reduced overhead, comprising:

• means for receiving a transmission from a waking user equipment (UE), the transmission including uplink information, the uplink information including an uplink timing of the UE;
• means for determining that the waking UE requires a timing update based upon the uplink information;
• means for calculating a timing adjustment for the waking UE when it is determined that the waking UE requires a timing update;
• and
• means for issuing a timing adjustment command to the waking UE, on a per-need basis, when it is determined that the waking UE requires a timing update, wherein the issuance of the timing adjustment command is based on properties of the UE;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE.

A computer program product stored on a non-transitory computer-readable medium, comprising code for:

• receiving a transmission from a waking user equipment (UE), the transmission including uplink information, the uplink information including an uplink timing of the UE;
• determining that the waking UE requires a timing update based upon the uplink information;
• calculating a timing adjustment for the waking UE when it is determined that the waking UE requires a timing update;
• and
• issuing a timing adjustment command to the waking UE, on a per need basis, when it is determined that the waking UE requires a timing update, wherein the issuance of the timing adjustment command is based on properties of the UE;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE.

In a wireless communication system, an apparatus comprising an integrated circuit configured to:

• receive a transmission from a waking user equipment (UE), the transmission including uplink information, the uplink information including an uplink timing of the UE;
• determine that the waking UE requires a timing update based upon the uplink information;
• calculate the timing adjustment for the waking UE when it is determined the waking UE requires a timing update;
• and
• issue a timing adjustment command to the waking UE, on a per-need basis, when it is determined that waking UE requires a timing update, wherein the issuance of the timing adjustment command is based on properties of the UE;
• wherein the properties of the UE comprise at least one of a velocity of the UE and a current synchronization timing of the UE.