Sending method for TA (Time Advance) regulating command of LTE (Long Term Evolution) and base station

A technology for adjusting commands and time advance, which is applied in network traffic/resource management, electrical components, wireless communication, etc. It can solve problems such as UE traffic drop, TA timer timeout, and channel drop, so as to increase traffic and reduce time advance adjustment. The probability of command, the effect of reducing uplink out-of-sync

Inactive Publication Date: 2012-08-22
ZTE CORP
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Problems solved by technology

[0004] In the prior art, the base station generally calculates the time advance adjustment command according to the measured TA value, and then notifies the UE to adjust the TA. If HARQ (Hybrid Automatic RepeatreQuest, hybrid automatic repeat request) retransmission fails at this time, that is If the UE still fails to rec

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  • Sending method for TA (Time Advance) regulating command of LTE (Long Term Evolution) and base station
  • Sending method for TA (Time Advance) regulating command of LTE (Long Term Evolution) and base station
  • Sending method for TA (Time Advance) regulating command of LTE (Long Term Evolution) and base station

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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] An embodiment of the present invention provides a method for sending an LTE time advance adjustment command, and the steps of the method are implemented by a base station, such as figure 1 and figure 2 As shown, the method includes the steps of:

[0047] Step S109, initialize the parameters. This step is a preferred step. The initialization of the parameters specifically includes: determining the period of the TA timer, the maximum number of transmissions of each HARQ process, the maximum number of HARQ processes MaxNum for sending the time advance adjustment command, The time when the timi...

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Abstract

The invention relates to a sending method for a TA (Time Advance) regulating command of LTE (Long Term Evolution) and a base station. The method comprises the following steps of: S110, generating the TA regulating command by the base station; S120, issuing the TA regulating command to UE (User Equipment) by the base station through the certain time and the corresponding HARQ (Hybrid Automatic Repeat Request) course and adding 1 for the value of a Counter of the HARQ course; S130, judging whether to send the TA regulating command again or not by the base station according to whether ACK (Acknowledgement) of the HARQ course fed back by the UE is received or not, executing step S140 if the ACK is not received, and executing step S160 if the ACK is received; S140, judging whether the Counter is less than MaxNum or not, executing step S 120 and issuing the TA regulating command through the other HARQ course if so, and executing step S150 if not; S150, waiting for the timeout of a TA timer; and S160, restarting the TA timer after the timeout of the TA timer so that the situation of upstream step failing out caused by the timeout of the TA timer can be avoided.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for sending an LTE time advance adjustment command and a base station. Background technique [0002] In an LTE (Long Term Evolution, long-term evolution) system, a time advance (Time Advance, TA) is a parameter used to characterize the timing deviation of eNodeB (evolved base station) receiving data sent by UE (User Equipment, user equipment). In order to maintain uplink synchronization, the eNodeB instructs the UE to send DMRS (Demodulation reference signal, uplink demodulation reference signal) or SRS (sounding reference signal, sounding reference signal) at a specified time point. After timing measurement to obtain TA, the eNodeB shares the channel through the physical downlink Send the timing advance adjustment command to the UE for adjustment, so as to maintain the uplink synchronization between the UE and the eNodeB. [0003] In LTE, the time advanc...

Claims

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Application Information

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IPC IPC(8): H04W28/04H04W56/00
Inventor 余秋星陈琼
Owner ZTE CORP
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