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Terminal uplink self-synchronization method and terminal

A self-synchronizing, terminal technology, applied in the field of communication, can solve the problem of wasting air interface resources

Active Publication Date: 2018-11-30
CHENGDU TD TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a terminal uplink self-synchronization method and a terminal, which are used to solve the problem of wasting air interface resources when a terminal in an IDLE state realizes uplink synchronization with a base station through a random access process

Method used

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  • Terminal uplink self-synchronization method and terminal
  • Terminal uplink self-synchronization method and terminal

Examples

Experimental program
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Embodiment 1

[0025] figure 1 A schematic diagram of a terminal uplink self-synchronization method provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the terminal uplink self-synchronization method includes the following steps:

[0026] 101. During a random access process before attaching, the terminal receives a random access response sent from the base station, and records the time when the random access response is received on the terminal side as the receiving time.

[0027] Specifically, in the random access process, the terminal sends a random access request to the base station, and after receiving the random access request (Message1, MSG1 for short), the base station sends a random access response (Message2, MSG2 for short) to the terminal. The terminal records the time at the terminal side when the random access response is received as the reception time. In this embodiment, when receiving the random access response sent by the base station, the term...

Embodiment 2

[0054] figure 2 A schematic diagram of a terminal uplink self-synchronization method provided in Embodiment 2 of the present invention, as shown in figure 2 As shown, the terminal uplink self-synchronization method includes the following steps:

[0055] 201. The terminal acquires the clock offset between the base station and the terminal.

[0056] In this embodiment, the clock offset between the terminal and the base station is obtained according to the steps in the first embodiment above, and the specific process may refer to the relevant content in the above embodiment and will not be repeated here.

[0057] 202. The terminal receives the downlink synchronization signal delivered by the base station, and records the time when the downlink synchronization signal is received on the terminal side as the reception time of the downlink synchronization signal.

[0058] When receiving the downlink synchronization signal delivered by the base station, the terminal records the cu...

Embodiment 3

[0070] image 3 It is a schematic structural diagram of a terminal provided by Embodiment 3 of the present invention. Such as image 3 As shown, the terminal includes: a record module 31 , a determination module 32 , a first acquisition module 33 , a calculation module 34 and a second acquisition module 35 .

[0071] Wherein, the recording module 31 is configured to receive a random access response sent from the base station during the random access process before attaching, and record the time when the random access response is received on the terminal side as the receiving time, And the time when the terminal side sends the radio resource control connection request MSG3 to the base station is recorded as the MSG time.

[0072] The determining module 32 connected to the recording module 31 is configured to determine the downlink sending time of the base station side when the base station sends the random access response according to the receiving time and the coverage of th...

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Abstract

The invention provides a terminal uplink self-synchronization method and a terminal. The terminal uplink self-synchronization method comprises the steps of receiving a random access response by the terminal in the random access process before attachment, marking a moment when the random access response is received as a receiving moment of the terminal side, determining a downlink sending moment of the base station side when a base station sends the random access response according to the receiving moment and a coverage range of the current cell, marking a moment of the terminal side when MSG3 is sent to the base station as an MSG moment, acquiring a moment of the terminal side when the base station sends the random access response according to the receiving moment, the MSG moment and a specified time interval between the moment when the base station sends the random access response and the moment when the base station receives the MSG3, marking the moment of the terminal side as a synchronization moment, regarding deviation between the synchronization moment and the downlink sending moment as a clock deviation amount between the terminal and the base station, and acquiring a TA value required by terminal uplink synchronization according to the clock deviation amount and received downlink synchronization signals sent by the base station. According to the invention, unlink self-synchronization of the terminal with the base station is realized without depending on the random access process any more, and resources are saved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a terminal uplink self-synchronization method and a terminal. Background technique [0002] Most of the monitoring terminals in the trunking service are in the idle (IDLE) state. Generally, the monitoring terminals in the IDLE state do not perform uplink synchronization, so the monitoring terminals cannot perform uplink feedback to the base station. In the existing technology, the terminals in the IDLE state can only use random access The process realizes the uplink synchronization of the listening terminal. [0003] In practical applications, the base station does not allocate and maintain uplink synchronization air interface resources for terminals in the IDLE state. After the attached terminal, the terminal that has achieved uplink synchronization through random access, after being in the IDLE state, the base station takes back the uplink synchronization resource. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 谌晓清
Owner CHENGDU TD TECH LTD
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