Mobile Handoff Method Based on Coordinated Multipoint Transmission

A multi-point transmission and mobile user technology, which is applied in the downlink of heterogeneous wireless networks and mobile handover of users, can solve the problems affecting the communication quality of users and minimize the number of handovers, so as to meet the requirements of low speed and reduce the number of handovers Effect

Active Publication Date: 2018-07-27
XIDIAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the handover algorithm improves the capacity of the system, it cannot guarantee that the number of handovers will be minimized. In areas where micro cells are densely deployed, frequent handovers of users will seriously affect the communication quality of users.

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
  • Mobile Handoff Method Based on Coordinated Multipoint Transmission
  • Mobile Handoff Method Based on Coordinated Multipoint Transmission
  • Mobile Handoff Method Based on Coordinated Multipoint Transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Below with reference to accompanying drawing, technical scheme and effect of the present invention are further described:

[0030] refer to figure 1 , the application scenario of the present invention is a system in which a macrocell M and several microcells are deployed. The microcells are within the coverage of the macrocell, and microcells are densely deployed in hotspot areas and blind spot areas, forming microcell clusters. Assuming that mobile users move along a straight line, such as mobile user 1 and mobile user 2, there are N sta static users, N movmobile users, and the total system bandwidth is B, the system will reserve αB bandwidth exclusively for channel allocation of CoMP users, where 0<α<1, and the remaining (1-α)B bandwidth resources are used for non- Channel allocation for CoMP users, and only one sub-channel is allocated to both CoMP users and non-CoMP users. Micro cells use graph theory to allocate (1-α)B bandwidth resources, while macro cells use ...

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

The invention discloses a mobile switching method based on coordinated multipoint transmission and mainly solves the problem in the prior art that in a heterogeneous network densely distributed with micro cells, a mobile user needs to frequently switch over. The mobile switchover method comprises the following realization steps: (1) the time when the mobile user detects a reference signal of a macro base station for the first time and a serving cell are initialized; (2) the user judges whether a cell set capable of being detected is an empty set or not at an interval of time T, if yes, mobile switchover is terminated, and if not, a control cell decides that the user performs virtual cell switchover according to switchover conditions; (3) the user determines a main cell and reports global channel state information to the main cell; (4) the main cell searches an optimal virtual cell for the user to switch over according to the global channel state information, and after the switchover is successful, the step (2) is returned. According to the mobile switchover method, the switchover frequency of the user in the moving process is reduced. The mobile switchover method can be applied to a downlink in a heterogeneous wireless network environment where macro cells and micro cells coexist.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a mobile switching method of a user, which can be used for the downlink of a heterogeneous wireless network in which a macro cell and a micro cell coexist. Background technique [0002] In order to meet the increasing data transmission needs of users and increase the total capacity of the network, especially to improve the communication quality of users in hot spots and blind spots, operators deploy a large number of low-power nodes under traditional macro base stations, such as micro cells and pico cells , home cells, relay nodes, etc. These low-power nodes are collectively called micro cells, which form a heterogeneous network where macro base stations and micro cells coexist. The mobile handover of the user means that the user will move from the coverage area of ​​the serving cell to the coverage area of ​​another cell during the mobile process. At t...

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 Patents(China)
IPC IPC(8): H04W36/00
CPCH04W36/0083
Inventor 赵林靖张燕张岗山张顺赵佳李钊
Owner XIDIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap