Unlock instant, AI-driven research and patent intelligence for your innovation.

D2D (Device-to-Device) communication method based on network coding in cellular network

A network coding, cellular network technology, applied in the field of wireless communication, can solve the problems of cellular user interference, co-channel interference, etc.

Active Publication Date: 2017-07-21
NANJING UNIV OF POSTS & TELECOMM
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when D2D users reuse the existing uplink and downlink resources, it will inevitably cause interference to the original cellular users in the system, resulting in the problem of co-channel interference

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
  • D2D (Device-to-Device) communication method based on network coding in cellular network
  • D2D (Device-to-Device) communication method based on network coding in cellular network
  • D2D (Device-to-Device) communication method based on network coding in cellular network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0032] The uplink radio resource mode of the D2D communication multiplexing cell system described in the present invention is as follows: figure 1 The interfering link in the first time slot of data packet transmission in (a), figure 1 The interfering link during the second time slot of packet transmission in (b) is shown. There are n traditional cellular uplink users evenly distributed in the coverage area of ​​a base station, and each user directly communicates with the base station. D. a and D b It is a pair of D2D users, through the relay user D in the coverage area of ​​the base station Rcommunicate with each other. The uplink system bandwidth is divided into K sub-channels orthogonally, and each sub-channel has a bandwidth of B. Without loss of generality, we assume that each subchannel is uniquely assigned to a conventional cellular up...

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 D2D (Device-to-Device) communication method based on network coding in a cellular network. According to the method provided by the invention, a D2D system based on network coding is provided. According to the D2D communication system, the throughput of the system is improved through adoption of a network coding technology and the transmission time of a data packet is reduced. Under the condition that network load is relatively high, spectrum resources of the cellular network can be multiplexed by D2D communication, so a spectrum utilization rate is improved. The same frequency interference problem results from spectrum multiplexing, so how to reduce the interference between D2D users and cellular users through a reasonable resource allocation algorithm is crucial. In general, a base station can allocate resources in modes such as channel allocation, power control and model selection. According to the D2D communication power control and resource link allocation method based on the network coding provided by the invention, on the premise of ensuring quality of service (QoS) demands of traditional cellular users, the transmission time of the D2D communication is minimized.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a D2D communication method based on network coding in a cellular network. Background technique [0002] D2D (device-to-device) communication enables two user equipments (UEs) to communicate directly with each other bypassing cellular base stations (BSs). D2D communication can reuse existing uplink and downlink resources to realize end-to-end direct communication. This can not only improve the utilization rate of wireless spectrum resources and reduce terminal transmission power, but also increase the capacity of the communication system and reduce the workload of the base station, thereby causing problems such as congestion. [0003] However, when D2D users reuse the existing uplink and downlink resources, it will inevitably cause interference to the original cellular users in the system, resulting in co-channel interference. How to choose the best resour...

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): H04W4/00H04W28/24H04W72/08H04L1/00H04W72/54
CPCH04L1/0076H04W4/70H04W28/24H04W72/543
Inventor 梅中辉程宏秀
Owner NANJING UNIV OF POSTS & TELECOMM