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Uplink synchronization method, base station and terminal of secondary cell

A secondary cell and terminal technology, applied in the field of communication, can solve problems such as the inability to synchronize the uplink timing of the primary cell and the secondary cell, and achieve the effect of ensuring normal communication

Active Publication Date: 2017-02-08
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides an uplink synchronization method for a secondary cell, a base station and a terminal to at least solve the technical problem in the prior art that the uplink timing of the primary cell and the secondary cell cannot be synchronized

Method used

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  • Uplink synchronization method, base station and terminal of secondary cell
  • Uplink synchronization method, base station and terminal of secondary cell
  • Uplink synchronization method, base station and terminal of secondary cell

Examples

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Embodiment 1

[0030] figure 2 It is a preferred structural diagram of an uplink synchronization system of a secondary cell according to an embodiment of the present invention, which includes: a base station 202 and a terminal 204 communicating with each other.

[0031] In the process of synchronizing the uplink timing of the secondary cell, the terminal 204 sends a random access preamble to the base station 202 on the secondary cell of the base station 202 according to the uplink timing of the primary cell on the terminal 204 side; the base station 202 receives the random access preamble Afterwards, the receiving time of the random access preamble is compared with the downlink timing of the primary cell on the side of the base station 202, and timing adjustment indication information is generated according to the comparison result, wherein the timing adjustment indication information is used to instruct the terminal 204 to place the secondary cell in the terminal 204 The uplink timing of t...

Embodiment 2

[0040] exist Figure 2-Figure 4 On the basis of the system and device shown, the present invention also provides a preferred uplink synchronization method of the secondary cell, such as Figure 5 As shown, the uplink synchronization method of the secondary cell includes the following steps:

[0041] S502. The base station receives the random access preamble sent by the terminal on the secondary cell according to the uplink timing of the primary cell on the terminal side;

[0042] S504, the base station compares the receiving time of the random access preamble with the downlink timing of the primary cell on the base station side;

[0043] S506. The base station generates timing adjustment indication information according to the comparison result, and sends the timing adjustment indication information to the terminal, where the timing adjustment indication information is used to instruct the terminal to adjust the uplink timing of the secondary cell on the terminal side to be t...

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Abstract

The present invention provides a method, a base station and a terminal for secondary cell uplink synchronization, wherein the method comprises: the base station receives a random access preamble sent by the terminal according to the uplink scheduling of the primary cell on the terminal-side in a secondary cell; the base station compares the receiving time of the random access preamble with a downlink scheduling of the primary cell on the base station-side; the base station creates a scheduling adjusting indication information according to the compare result,and then sends the scheduling adjusting indication information to the terminal, wherein the scheduling adjusting indication information is used to indicate the terminal to adjust the uplink scheduling of the secondary cell on the terminal-side to synchronize with the uplink scheduling of the primary cell on the base station-side. The present invention solves the technique problem that in the prior art, the uplink scheduling synchronization could not be implemented between the primary cell and the secondary cell. The present invention guarantees the normal communication between the base station and the terminal.

Description

technical field [0001] The present invention relates to the communication field, in particular to an uplink synchronization method of a secondary cell, a base station and a terminal. Background technique [0002] Carrier aggregation is a core function in the enhanced version of the long-term evolution system, which greatly increases the uplink and downlink rate of UE (User Equipment, user equipment) by using several carriers or cells in parallel. The cell aggregated by the UE with the carrier aggregation function is divided into a Primary Cell (referred to as Pcell) and several secondary cells (Secondary Cell, referred to as Scell), and the primary cell is responsible for radio resource control (Radio Resource Control, referred to as RRC) connection establishment, re-establishment and handover, and provides non-access stratum (NonAccess Stratum, NAS for short) mobility information (such as Tracking Area Indicator, TAI for short) for each serving cell (that is, Pcell or Scell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/00
Inventor 王坚马伟朱昀尚国强
Owner ZTE CORP
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