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Synchronization method and device

A subframe position and difference technology, applied in the field of communication, can solve the problems of long data interruption time and affect the normal operation of business, so as to reduce the data interruption time and ensure the normal operation

Active Publication Date: 2021-01-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The present invention provides a synchronization method and device to at least solve the problem in the related art that when the terminal and the target cell are synchronized, the data interruption time will be long and the normal operation of the service will be affected

Method used

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  • Synchronization method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] In this embodiment, the subframe boundary of the source cell measured by the UE is before the target cell boundary given by the network (ie, the network side), and the subframe boundary of the source cell measured by the UE is at the subframe boundary of the target cell before, such as Image 6 as shown, Image 6 is an illustration of the subframe boundary between the source cell and the target cell according to an embodiment of the present invention Figure 1 .

[0068] Figure 7 It is a flow chart of a terminal switching cells according to an embodiment of the present invention, such as Figure 7 As shown, the process includes the following steps:

[0069] Step S702: the source base station and the target base station negotiate the subframe position where the UE starts to send and receive data after switching to the target cell. During the negotiation process, the source base station and the target base station need to exchange the SFN difference information (cor...

Embodiment 2

[0082] In this embodiment, the subframe boundary of the source cell measured by the UE is after the target cell boundary given by the network, and the subframe boundary of the source cell measured by the UE is before the subframe boundary of the target cell, such as Figure 8 as shown, Figure 8 is an illustration of the subframe boundary between the source cell and the target cell according to an embodiment of the present invention Figure II .

[0083] The steps of this embodiment are the same as in Embodiment 1. In step S706, for the subframe boundary between the source cell and the target cell measured by the UE on the network side, if the subframe boundary of the source cell measured by the UE is after the target cell boundary given by the network, the source cell measured by the UE The subframe boundary of is before the subframe boundary of the target cell, such as Figure 8 shown. Then the UE can calculate and obtain the TA value of the target cell, and obtain uplin...

Embodiment 3

[0090] In this embodiment, the subframe boundary of the source cell measured by the UE is after the target cell boundary given by the network, and the subframe boundary of the source cell measured by the UE is after the subframe boundary of the target cell, such as Figure 9 as shown, Figure 9 is an illustration of the subframe boundary between the source cell and the target cell according to an embodiment of the present invention Figure three .

[0091] The steps of this embodiment are the same as in Embodiment 1. In step S706, for the subframe boundary between the source cell and the target cell measured by the UE on the network side, if the subframe boundary of the source cell measured by the UE is after the target cell boundary given by the network, the source cell measured by the UE The subframe boundary of is after the subframe boundary of the target cell, such as Figure 9 shown. Then the UE can calculate and obtain the TA value of the target cell, and obtain upli...

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Abstract

The present invention provides a synchronization method and device, wherein the method includes: receiving the first system frame number SFN difference information between the source cell and the target cell sent by the source base station and the sub-frame number for the terminal UE to start sending and receiving data in the target cell Frame position information, wherein the first SFN difference information is determined by the source base station and the target base station through negotiation and interaction, and the subframe position information is determined according to the first SFN difference information; according to the first SFN difference information and subframe The frame position information determines the actual subframe position at which data is sent and received in the target cell; and performs downlink synchronization with the target cell according to the determined actual subframe position. The present invention solves the problem in the related art that when the terminal synchronizes with the target cell, it will cause a long data interruption time and affect the normal operation of the service, thereby reducing the data interruption time when the terminal synchronizes with the target cell. Ensure the normal operation of the business effect.

Description

technical field [0001] The present invention relates to the communication field, in particular to a synchronization method and device. Background technique [0002] figure 1 It is a flow chart of a cell switching by a terminal in the related art. The source base station can initiate a data forwarding process to the target base station after sending the switching command or at the same time. The flow after sending the switching command is as follows: [0003] Step S102: After receiving the handover command, the UE performs downlink synchronization of radio signals with the target cell, including frequency synchronization and time synchronization. [0004] Step S104: the UE waits for an available random access opportunity. [0005] Step S106: the UE initiates a random access request at an available random access opportunity. [0006] Step S108: After receiving the random access request from the UE, the target eNB sends a random access response and an uplink timing advance (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W56/00
CPCH04W36/0077H04W56/001H04W36/18
Inventor 吴昱民
Owner ZTE CORP