Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Handover control method, control device, adjustment device, and non-emporary computer-readable medium

A control method and a technology of a control device, which are applied to electrical components, wireless communication, etc., can solve problems such as switching is difficult to occur at the time of switching startup, and achieve the effect of reducing switching failures

Active Publication Date: 2013-09-04
NEC CORP
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because as the TTT is longer, the duration of the HO start condition needs to be longer, therefore, the handover start time is delayed and the handover becomes difficult to occur

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Handover control method, control device, adjustment device, and non-emporary computer-readable medium
  • Handover control method, control device, adjustment device, and non-emporary computer-readable medium
  • Handover control method, control device, adjustment device, and non-emporary computer-readable medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] figure 1 A configuration example of a network according to this embodiment is shown. The handover control method according to this embodiment is performed by the handover (HO) start state determination unit 11 . The HO activation state determination unit 11 determines the HO activation state. This HO enabled state is used as a trigger for handover of a mobile station (User Equipment (UE)) 5 that is connecting to and communicating with a serving cell 61 to a neighboring cell 62 . The HO start state determining unit 11 uses a hold time, ie TTT, to provide a delay time from when the HO start condition is met to when handover is started. Specifically, the HO activation status determining unit 11 determines the HO activation status based on the time period during which the HO activation condition is satisfied lasts longer than the TTT. Furthermore, the HO activation state determination unit 11 is characterized in that two HO activation states are determined by using diffe...

no. 2 example

[0080] In this embodiment, an alternative example to the first embodiment described above will be described. Figure 9 A configuration example of a network according to this embodiment is shown. Figure 9 The HO condition determination unit 211 is described, instead of Figures 1 to 3 The HO condition determination unit 11 shown in .

[0081] The HO activation state determination unit 211 according to this embodiment recognizes the cell type of the neighboring cell 62, and only when the cell type of the neighboring cell 62 is a small-scale When using two HO activation conditions and two TTTs (TTT1 and TTT2), the determination of the first and second HO activation states is performed. On the other hand, when the cell type of the neighboring cell 62 is the same as that of the serving cell 61, in the same manner as above, the HO start state determination unit 211 uses one HO start condition and one TTT (for example, the first HO start condition and TTT1), to perform the determ...

no. 3 example

[0089] In this embodiment, an alternative example of the first embodiment is described. Figure 11 A configuration example of a network according to this embodiment is shown. Figure 11 Describes the HO start state determination unit 311, instead of Figures 1 to 3 The shown HO activates the state determination unit 11 . Note that the HO start state determination unit 311 can be placed in UE5, such as Figure 12 shown.

[0090] Only when the handover performance between the serving cell 61 and the neighbor cell 62 is degraded, the HO start state determining unit 311 according to this embodiment uses two HO start conditions and two TTTs (TTT1 and TTT2) to determine the first and second Two HO start status. It can be based on the frequency of handover failures from the serving cell 61 to the neighboring cell 62 (too late handover, too early handover, handover to the wrong cell), the frequency of ping-pong handover between the serving cell 61 and the neighboring cell 62, or d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This method for controlling handover of a mobile station from a first cell (61) to a second cell (62) includes adjusting handover parameters in a manner so that, when the wireless quality of the first cell (61) at the position of the mobile station (5) is a first level, the lag time from when handover start conditions are met to when handover is started is shorter than that in the case when the wireless quality of the first cell is a second level that is higher than the first level. As a result, for example in HCS (HetNet), handover failure and ping-pong / rapid handover are both reduced, and a mobile station that is expected to remain in a small-scale cell for at least a certain period of time can be efficiently accommodated in the small-scale cell.

Description

technical field [0001] The present invention relates to handover control in cellular radio communications. Background technique [0002] In various systems, TTT (Time To Trigger) is used to adjust the delay time from when a condition for a state transition from one operating state to another is satisfied to when the state transition is actually initiated. TTT is also called hold time or guard time in some cases. Typically, TTT is used to determine the period during which state transition conditions need to be maintained. Specifically, when the state transition condition is continuously satisfied for a longer time than TTT, the state transition is actually initiated. Therefore, with longer TTTs, state transitions are less likely to occur. By employing hysteresis using TTT, the frequently repeated ping-pong phenomenon of state transitions between two operating states can be prevented. [0003] In cellular wireless communication, TTT is used as one of handover control param...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/38H04W36/30
CPCH04W36/38H04W36/0083H04W36/008375H04W36/302H04W36/0094
Inventor 指原利之滨边孝二郎松永泰彦
Owner NEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com