Method and device for adjusting user equipment uplink synchronization time
A user equipment and time adjustment technology, which is applied in the field of communication, can solve problems such as access failure and insufficient preamble detection capabilities, and achieve the effect of improving the access success rate and overcoming random access failures
Active Publication Date: 2019-07-23
苏州简约纳电子有限公司
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[0003] The existing random access process is to send the random access channel at a fixed time point. If the distance between the access terminal and the base station has exceeded the maximum distance supported by the base station search window, in this case the random access transmission, the base station will eventually fail to access due to insufficient detection capability of the access preamble sequence
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[0036] The method provided by the present invention is applied to the Long Term Evolution (LTE) network technology. When the user equipment UE selects a suitable cell to camp on, the user equipment establishes downlink synchronization with the base station, obtains frame synchronization and system broadcast messages; the user equipment UE After the downlink synchronization with the base station is completed, an initial random access is initiated to the base station, and only after the random access is successful, the user equipment performs data transmission on the basis of the established uplink synchronization. In order to make the signal requesting uplink synchronization sent by the user equipment be searched by the search window of the base station within a specified time, the time point at which the user equipment sends the signal requesting uplink synchronization is adjusted.
[0037] The technical solutions of the present invention will be described in further detail bel...
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The present invention provides a method and device for adjusting the uplink synchronization time of user equipment. The method includes: the user equipment receives a system message sent by a base station, the system message includes configuration information; according to the configuration information, it is determined that the user equipment sends a preamble A time point of the sequence signal; determining time adjustment information according to the time point and a preset time advance change step; and adjusting a time point at which the user equipment sends the preamble signal according to the time adjustment information. Therefore, the method for adjusting the uplink synchronization time of the user equipment provided by the present invention dynamically adjusts the time point at which the user equipment sends the preamble sequence by changing the step size of the preset timing advance, which effectively improves the connection of the equipment far away from the base station. into the success rate.
Description
technical field [0001] The present invention relates to the communication field, in particular to a method and device for adjusting uplink synchronization time of user equipment. Background technique [0002] In a wireless communication system, downlink synchronization must be completed before user equipment (UE) communicates with a base station, and uplink synchronization is further completed on this basis, that is, random access. Random access is one of the most important procedures in a wireless communication system, and it is responsible for tasks such as initial access of user equipment in the network, establishment of uplink synchronization, uplink resource request or handover access. The process of random access is the decisive link to ensure the establishment of communication, and it is also a key factor affecting user experience and system performance. [0003] The existing random access process is to send the random access channel at a fixed time point. If the dis...
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IPC IPC(8): H04W56/00H04W48/08
Inventor 梁敏吉亚平王宇飞邢娅玲
Owner 苏州简约纳电子有限公司