One uplink synchronization adjustment method and device
A technology for synchronous adjustment and value adjustment, which is applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve the problems of spectrum utilization rate decline, affect PUSCH demodulation performance, reduce spectrum utilization rate, etc., and achieve the goal of preventing spectrum utilization rate from decreasing Effect
Inactive Publication Date: 2020-01-17
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology
[0004] In practical applications, when the synchronization signal transmission cycle is small and the channel is not good, the eNB will frequently send TA adjustment commands to reduce spectrum utilization
When the synchronization signal transmission period is relatively large, during the period from the successful attachment of the UE to the uplink service request, if the UE moves and causes the TA to deviate too much from the target value, it will affect the subsequent PUSCH demodulation performance and reduce the spectrum utilization. During MCS selection, if the selected MCS level is low, the spectrum utilization rate will decrease; for example, if the PUSCH has multiple consecutive frame errors, the UE will return to the subband, which will also cause the spectrum utilization rate to decrease.
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[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] In the present invention, uplink synchronization is divided into three stages, wherein,
[0022] In the first stage, the uplink service of the user terminal is in the state of uplink authorization prohibition, and the resource request (Source Request, SR) signal is sent to the base station, and the base station obtains the time advance (Time Advanced, TA) based on the received SR signal and executes the first step accordingly. - Uplink synchronous operation;
[0023] In the second stage, the uplink service of the user terminal is in the uplink authorization enabled state, and the user terminal is in the first mobile state (described later), the base station receives the synchronization signal sent by the user terminal acco...
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The present invention provides an uplink synchronization adjustment method and device. According to the technical schemes of the invention, uplink synchronization is divided into three phases; according to the first phase, uplink synchronization is performed according to received SR (Source Request) signals; according to the second phase, uplink synchronization is performed on the basis of synchronization signals which are received according to a synchronization signal transmission period P1, and when a user terminal is in a second movement state, the method enters the third phase; and according to the third phase, uplink synchronization is performed on the basis of synchronization signals which are received according to a preset timing estimation period P2. According to the uplink synchronization adjustment method and device of the present invention, fast synchronization is performed in the initial phase of the uplink synchronization, and uplink synchronization tracking is performed when the user terminal moves slowly; and spectrum utilization rate decrease can be prevented with the demand of the mobile terminal supported.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an uplink synchronization adjustment method and device. Background technique [0002] With the continuous development of new wireless communication technologies, as well as the vigorous development of the mobile Internet and the Internet of Things industry, the demand for mobile applications in various industries has expanded rapidly. How to better support the mobile needs of terminals has become a focus of attention. [0003] In order to support mobile service applications, when there is a service request in the uplink, the user terminal periodically sends a synchronization signal, and the evolved base station (Evolved Node B, eNB) receives the synchronization information and estimates the timing advance (Timing Advance, TA), after averaging the TA obtained for M consecutive times, determine whether to send an adjustment command according to the average va...
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IPC IPC(8): H04W56/00
CPCH04W56/0045
Inventor 龚秋莎王丽池连刚
Owner POTEVIO INFORMATION TECH CO LTD