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Method for reducing time synchronization wireless network switching delay

A wireless network and time synchronization technology, applied in the direction of synchronization device, wireless communication, advanced technology, etc., can solve the problems of increasing switching delay and not considering the transmission time of synchronization signal block SSB, etc., and achieve the effect of reducing switching delay

Active Publication Date: 2022-08-02
深圳市佳贤通信科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When the handover command is sent to the existing source base station, the sending time of the synchronization signal block SSB of the target cell is not considered, so that when the user equipment UE receives the handover command and synchronizes to the target cell, it needs to wait for a long time to receive the synchronization block, thus The problem of increasing the overall switching delay, the present invention provides a method for reducing the switching delay of time-synchronized wireless networks

Method used

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  • Method for reducing time synchronization wireless network switching delay
  • Method for reducing time synchronization wireless network switching delay

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Embodiment 1

[0036] like figure 1 As shown in the figure, a method for reducing the time-synchronized wireless network handover delay adopts the following steps:

[0037] The time synchronization wireless network prepares for network switching, and continues to maintain data transmission with the source serving base station. The time synchronization wireless network is a wireless network with aligned system frame numbers and frame boundaries. The time synchronization wireless network consists of 5G intra-frequency networking and 5G inter-frequency grouping. network and 5 / 4G inter-system networking.

[0038] The source cell obtains the synchronization signal block sending time information of the target cell, and the time information includes the synchronization signal block period and offset and the synchronization signal block duration. The source cell and the target cell realize frame number and frame boundary alignment through GPS.

[0039] The source cell sends a handover command to th...

Embodiment 2

[0043] A method for reducing the time-synchronized wireless network handover delay, using the following steps:

[0044] The time synchronization wireless network prepares for network switching, and continues to maintain data transmission with the source serving base station. The time synchronization wireless network is a wireless network with aligned system frame numbers and frame boundaries. The time synchronization wireless network consists of 5G intra-frequency networking and 5G inter-frequency grouping. network and 5 / 4G inter-system networking.

[0045] The source cell obtains the synchronization signal block sending time information of the target cell, and the time information includes the synchronization signal block period and offset and the synchronization signal block duration. The source cell and the target cell realize frame number and frame boundary alignment through GPS.

[0046]The source cell sends a handover command to the user, the user synchronizes to the new...

Embodiment 3

[0050] Both cell 1 and cell 2 work in the 3540MHz frequency band, TDD is configured with DDDSUDDSUU, and the frame numbers and frame boundaries of the two cells are aligned through GPS. The SMTC information of cell 2 is: period 160ms, offset 0, duration 5ms, and the handover command is sent to the UE for analysis The maximum time required to start synchronization after the handover command is issued is 4ms, and a small time margin is set to 1, then M=5ms.

[0051] The user equipment UE1 is handed over at time SFN159subframe0. Since the difference between the next synchronization signal block SSB time SFN160 and the current time is equal to 10ms, which is greater than M, cell 1 will send a handover command to the user equipment UE1 in SFN159subframe3slot1.

[0052] User equipment UE2 switches at time SFN159subframe6. Since the difference between the next synchronization signal block SSB time SFN160 and the current time is equal to 4ms, which is less than M, cell 1 will send a ha...

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Abstract

The invention discloses a method for reducing switching time delay of a time synchronization wireless network, which belongs to the technical field of wireless communication and comprises the following steps that: the time synchronization wireless network performs network switching preparation and continues to keep data transmission with a source service base station, a source cell acquires synchronization signal block sending time information of a target cell, and the target cell sends the synchronization signal block sending time information; the time information comprises a synchronization signal block period and offset and synchronization signal block duration, the source cell sends a switching command to the user, the user carries out switching execution, and the switching execution of the user comprises the steps of receiving the switching command, suspending local data bearing, synchronizing to a new cell and sending a switching completion signal to the new cell. According to the invention, the switching time delay of the time synchronization wireless network can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular, relates to a method for reducing the handover delay of a time synchronization wireless network. Background technique [0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, and broadcasting, and typical wireless communication systems may employ systems capable of sharing available system resources (e.g., bandwidth, transmit power, etc.) ) to support multiple-access technology for communication with multiple users, a wireless communication network may include multiple base stations (BSs) capable of supporting communication for multiple user equipments (UEs), which can communicate via downlink and The uplink communicates with the base station (BS), the downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/18H04W56/00
CPCH04W36/08H04W36/18H04W56/001Y02D30/70
Inventor 王新玲李华栋江征群黄茂灵
Owner 深圳市佳贤通信科技股份有限公司