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Single-channel TCP/ IP header compression method and system for intelligent power grid

A smart grid and header compression technology, applied in the field of network communication, can solve the problems that business data cannot reach the receiving end in time, the proportion of TCP/IP packet header is large, and the success rate of business transmission is reduced, so as to improve real-time performance and success rate , reduce the probability of TCP retransmission, and reduce the effect of occupying time

Inactive Publication Date: 2015-05-13
POTEVIO INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The congestion window caused by the delay problem grows slowly, and the retransmission after packet loss leads to a waste of wireless resources. This problem still exists even when small data is transmitted;
[0006] 2) A large number of ACK confirmation packets in TCP transmission and keepalive packets to maintain the link state do not contain valid business information. At the same time, when a small amount of data is transmitted, the proportion of TCP / IP packet headers is very large, resulting in a waste of wireless resources;
[0007] 3) The occupation of wireless resources will also lead to a gradual increase in delay, and business data cannot reach the receiving end in time, reducing the success rate of business transmission

Method used

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  • Single-channel TCP/ IP header compression method and system for intelligent power grid
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  • Single-channel TCP/ IP header compression method and system for intelligent power grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Examples of the present invention image 3 As shown, the parts that can be compressed in the header file of the TCP / IP data packet in the smart grid system are as follows:

[0095] 1, 6, 9, and 12 in the figure, in most cases in power applications, the UE first initiates a TCP connection establishment request, the protocol stack is controllable, and does not carry options, so the length of the IP header and the header in the TCP header can be determined to be equal. It is 20, and the option can be omitted.

[0096] 2 in the figure, the present invention only compresses TCP data, and the 8-bit protocol can be omitted.

[0097] 3 and 10 in the figure, the checksum in the IP header and TCP header can be obtained by calculation.

[0098] 4, 5, 7, and 8 in the figure, once the TCP connection is established, the source IP address, destination IP address, source port number, and destination port number will not change, and there is no need to transmit each time.

[0099] 11...

Embodiment 2

[0101] Examples of the present invention Figure 4 as shown, Figure 4 For the compressed TCP / IP header file:

[0102] 1' in the figure uses the protocol version number 4 to represent a regular IP data packet, F represents a compressed data packet, and the receiving end identifies whether the data is compressed or not.

[0103] 2' in the figure, the 4-bit TOS comes from the 8-bit service type field in the IP header. The original 8-bit service type field includes a 3-bit priority subfield (which has been ignored now), and the 1-bit unused bit and the bit must be set to 0 and 4bit in the TOS field. Now only the 4bit TOS field is reserved, and the remaining 4bits are omitted.

[0104] 3' in the figure is the 6-bit reserved bit in the original TCP header, and 4 bits are omitted according to TCP alignment.

[0105] 4' in the figure saves the TCP link number with an 8-bit link number, which can be used to expand to support multiple TCP links.

Embodiment 3

[0107] Examples of the present invention Figure 5 As shown, the process of compression / decompression on UE and eNodeB includes:

[0108] After receiving a TCP / IP message from an external device or a data processing module in the UE, the compression / decompression module of the UE compresses the data message and sends it to the eNodeB through a wireless link.

[0109] The eNodeB receives the compressed message from the wireless link, decompresses the message, restores it into a TCP / IP message, and sends it to the EPC.

[0110] The eNodeB receives the TCP / IP message from the EPC, compresses it and sends it to the UE through the wireless link.

[0111] The compression / decompression module of the UE receives the compressed message, decompresses the message, restores it into a TCP / IP message, and sends it to an external device or a data processing module in the UE.

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Abstract

The invention provides single-channel TCP / IP header compression method and system for an intelligent power grid. The method comprises the steps of respectively acquiring field information which is carried by a TCP construction message and remains unchanged in the current TCP connection life cycle through a sending end and a receiving end while constructing the TCP connection, and treating the field information as the context information for header compression; performing header compression for a TCP / IP data packet to be transmitted through the sending end to obtain a compressed TCP / IP data packet; sending the compressed TCP / IP data packet to the receiving end by the sending end through a wireless link; recovering the received compressed TCP / IP data packet into the complete TCP / IP data packet by the receiving end according to the context information, the fixed value in the data packet, the remaining bit and the header checking method. According to the method, the header of the TCP / IP data packet is compressed; the transmission of data messages without carrying service information in the link is avoided to the maximum; therefore, the waste of the wireless link resource is reduced, and the utilization efficiency of the wireless link is increased.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a single-channel TCP / IP header compression method and system applied to a smart grid. Background technique [0002] The network architecture of the wireless broadband communication system mainly includes user equipment UE (User Equipment), evolved base station eNodeB (Evolved NodeB), and core network EPC (Evolved Packet Core). The eNodeB interacts with the UE for signaling and user plane data through the air interface. Its functions include receiving signaling and uplink data from the UE, and sending signaling responses and downlink data to the UE. The EPC is presented as three interfaces externally, the S1-MME interface is the signaling interface between the EPC and eNodeB, the S1-U interface is the user plane interface between the EPC and the eNodeB, and the SGI interface is the Network) interface. [0003] Most smart grid applications only need to maintain a tr...

Claims

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Application Information

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IPC IPC(8): H04W28/06H04W76/00
CPCH04L69/04H04W28/06H04L67/5651
Inventor 李日光郝宇博王颖
Owner POTEVIO INFORMATION TECH
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