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A method and device for determining information sending time

A technology for sending information and determining methods, which is applied in the field of communication, and can solve problems such as poor system reliability, inability to determine whether the current time has reached the synchronization cycle, lack of solutions, etc., and achieve the effect of improving system reliability

Active Publication Date: 2019-06-28
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the existing technology lacks corresponding solutions when the system timing period does not match the synchronization period, so it is impossible to determine whether the current time has reached the synchronization period, and the system reliability is poor

Method used

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  • A method and device for determining information sending time
  • A method and device for determining information sending time
  • A method and device for determining information sending time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0190] Embodiment 1. Synchronization processing: when the UE can obtain the current time, the absolute reference time method is used to determine the synchronization subframe.

[0191] When the configuration processing is synchronous processing, the configuration period cfgPeriod is the synchronization period syncPeriod, and the configuration offset OffsetIndicator is the synchronization configuration offset syncOffsetIndicator.

[0192] It is assumed that the absolute start time T of the synchronization signal (ie, the preset information) set by the system is sent ref 685.374ms, T ref It is the configured or pre-configured reference time, that is, the absolute reference time. The synchronization period is 200ms, and the syncOffsetIndicator configured in the system information is 101.

[0193] Suppose the UE can obtain the current time T through GNSS or system information current is 1186.875ms, then substitute the above parameters according to the synchronization subframe c...

Embodiment 2

[0199] Embodiment 2: Synchronization processing: least common multiple time method, the UE can directly obtain the current time:

[0200] see Figure 4 , when the configuration processing is synchronous processing, the configuration period cfgPeriod is the synchronization period syncPeriod, and the configuration offset OffsetIndicator is the synchronization configuration offset syncOffsetIndicator. The system timing period sysPeriod is 10240ms.

[0201] Assume that the synchronization period syncPeriod is 200ms, and the syncOffsetIndicator obtained from the system information is 101.

[0202] Assumption 1: UE can obtain the current time T through GNSS or system information current 20701.5ms, the absolute start time T of the synchronization signal transmission set by the system ref is 0.5ms, the processing is as follows:

[0203] Step 1: VFN coefficient a=10240mod syncPeriod=40;

[0204] Step 2: The least common multiple of 10240 and syncPeriod Y=[10240, syncPeriod]=10240*...

Embodiment 3

[0225] Embodiment 3. Synchronization processing: least common multiple time method, the UE cannot obtain the current time:

[0226] When the configuration processing is synchronous processing, the configuration period cfgPeriod is the synchronization period syncPeriod, and the configuration offset OffsetIndicator is the synchronization configuration offset syncOffsetIndicator. The system timing period sysPeriod is 10240ms.

[0227] Assume that the synchronization period syncPeriod is 200ms, and the syncOffsetIndicator obtained from the system information is 101.

[0228] Assumption 1: Assume that the parameters are as follows:

[0229] The UE obtains a VFN of 2 from system information, or from other UE transmission information;

[0230] The UE obtains DFN 22 and DFN subframe 1 from system information, or other UE transmission information or from the local oscillator;

[0231] The calculation process is as follows:

[0232] Step 1: VFN coefficient a=10240mod syncPeriod=40; ...

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Abstract

The present invention discloses an information sending time determination method and device. The method and the device provided by the invention are used to give a corresponding solution scheme when asystem timing cycle and a configuration period are not matched. The method comprises the steps that: determining a direct frame number (DFN) corresponding to the current time and DFN subframes; whenthe system timing period and the configuration period are not matched, determining a specific cycle comprising a plurality of preset frames through utilizing the lowest common multiple of the system timing cycle and the configuration cycle, wherein the configuration period is a period of sending preset information, duration of each preset frame is the same as the system timing period, and the specific period is the same as the configuration period in start time; determining a preset frame corresponding to the current time according to the specific period; and determining whether the DFN subframes are subframes configured to send the preset information or not according to the DFN, the DFN subframes and the preset frame corresponding to the current time.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for determining information sending time. Background technique [0002] In the long term evolution (Long Term Evolution, LTE) device to device (Device to Device, D2D), the nodes within the coverage of the LTE network (user equipment within the coverage of the LTE network) according to the system frame number of the evolved base station (Evolved NodeB, eNB) ( System Frame Number, SFN) determines the direct frame number (Direct Frame Number, DFN) of this node, and the node outside the LTE network coverage (the user equipment outside the LTE network coverage) receives the Physical Sidelink Broadcast Channel (Physical Sidelink Broadcast Channel, PSBCH), or the local node generates the DFN according to the local oscillator. Then, according to the DFN, the DFN subframe and the offset parameters of the synchronization subframe, the synchroniza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W72/04
CPCH04W56/001H04W56/0015H04W72/0446
Inventor 赵丽梁靖张惠英房家奕
Owner DATANG MOBILE COMM EQUIP CO LTD