Internet DRAFT - draft-wang-tcpm-media-control-layer
draft-wang-tcpm-media-control-layer
Informational F.Wang
Internet Draft Beijing Institute of Technology
Intended status: Informational Z.Fei
Expires: Nov 18, 2015 Beijing Institute of Technology
May 18, 2015
New Media Control Protocol Above TCP in Transmission Layer
draft-wang-tcpm-media-control-layer-02.txt
Abstract
This document describes a new Media Control Protocol (MCP) above the
TCP layer in multimedia transimission network. The MCP have the label
to show the classification of the data from the appliation layer.It
also can identify and label the transimission in wired or wireless
mode. These tags can optimize the TCP transimission with different
methods.
Status of this Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 3
3. Media Control Protocol . . . . . . . . . . . . . . . . . . . . 3
3.1. The framework of the MCP . . . . . . . . . . . . . . . . . 3
3.2. The tags in the MCP header . . . . . . . . . . . . . . . . 3
3.3. The work shceme of MCP . . . . . . . . . . . . . . . . . . 5
4. The Extension of the MCP. . . . . . . . . . . . . . . . . . . . 5
5. Security Considerations . . . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
The TCP/IP is the most famous protocols. It provides the end-to-end
connectivity in the network. The Transmission Control Protocol (TCP)
is one of the core protocols of the Internet protocol suite (IP), and
is so common that the entire suite is often called TCP/IP. TCP
provides reliable, ordered and error-checked delivery of a stream of
octets between programs running on computers connected to a local
area network, intranet or the public Internet. It resides at the
transport layer.But the TCP is designed for the data transmission
in the wired network. The packe loss in the wired network is about
10e-6, but in the mobile network is about 10e-3. And the download
throughtput has the giant decrease. Especially in the mobile wireless
network like LTE/WiMax, once the packet loss happened,the protocol
only take it as the congestion and decrease the receiving windows.
But in fact the packet loss is caused by the change of the wireless
environment.So TCP protocol only itself don't have the great
advantages in the wireless environment.
In this document, a new Media Control Protocol (MCP) above the
TCP layer in multimedia transimission network. It combines with the
TCP in the transmission layers. The MCP have the label to show the
classification of the data from the appliation layer. It also can
identify and label the transimission in wired or wireless mode. These
tags can optimize the TCP transimission with different methods. These
methods include the TCP-Network Coding(TCP-NC), the new congestion
control method et. al.Especially in the wireless network, the MCP/TCP
can provide the better QoE for the end users.
2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
In this document, these words will appear with that interpretation
only when in ALL CAPS. Lower case uses of these words are not to be
interpreted as carrying RFC-2119 significance.
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A list of acronyms and abbreviations used in this document are
presented below.
o MCP: Media Control Protocol
o TCP: Transmission Control Protocol
o QoE: Quality of Experience
3. Media Control Protocol
3.1. The framework of the MCP
The MCP protocol is above the TCP protocol.It's not the new
indenpend layer,it must work with the TCP protocol. These two
protocol works in the transport layer.
Just as show in Figure 2, it only adds the MCP header from the
application layer.This sturcture can guarantee the
+--------------------------------------------------------------+
| +---------+ |
| | Data| |
| +---------------------+ |
| | TCP header|TCP data | |
| +-----------------------------+ |
| |IP header| IP data | |
| +-------------------------------------------+ |
| |Header| Frame Data|Footer| |
| +-------------------------------------------+ |
+--------------------------------------------------------------+
Figure 1. The framework of the TCP/IP suite
+--------------------------------------------------------------+
| +----+ |
| |Data| |
| +--------------------------+ |
| | |MCP header|Data| |
| |TCP header| TCP data| |
| +------------------------------------+ |
| |IP header| IP data | |
| +--------------------------------------------------+ |
| |Header| Frame Data|Footer| |
| +--------------------------------------------------+ |
+--------------------------------------------------------------+
Figure 2. The framework of the MCP/TCP/IP suite
3.2. The tags in the MCP header
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The MCP header is in 16 bits long. The detail is in Figure 3.
+------------------------------------------------+
| MCP header |
+------------------------------------------------+
|Offsets Octet |
+------------------------------------------------+
| o | 1 | |
+------------------------------------------------+
|0|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15| |
|VER|X|M| D | NET | OPT |EXT | |
+------------------------------------------------+
| MCP data |
+------------------------------------------------+
Figure 3. The MCP header structure
VER
The ver is the version of the MCP. This is the first version.
X
The x is the extra with only 1 bit.If it is 1, it means the MCP has
the extra header between the basic header and the data.
M
This is the tag to show the end of the data used by application.
D
This tag has 2 bits and can list 4 types of the data. In the first
version, we only consider the text data or the media data.
NET
The net show the transmission environment in the wired network or the
wireless network. This can help the TCP protocol optimize the
congestion avoidance algorithm. The 0x0 represents wireless network
and the 0x1 represents the cable network.
OPT
The optimization mechanism is the tags of different congestion
method in TCP transmission.
EXT
The extension is 4 bits for the future use.
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3.3. The work shceme of MCP
TBD
4. The Extension of the MCP
TBD
5. Security Considerations
Same security considerations of [RFC6247]
6. IANA Considerations
Same IANA considerations of [RFC6247].
7. References
7.1. Normative References
[RFC6247] L. Eggert, "Moving the Undeployed TCP Extensions RFC 1072,
RFC 1106, RFC 1110, RFC 1145, RFC 1146, RFC 1379, RFC
1644, and RFC 1693 to Historic Status", RFC 6247, May
2011, <http://www.rfc-editor.org/info/rfc6247>.
[RFC4022] Raghunarayan, R., "Management Information Base for the
Transmission Control Protocol (TCP)", RFC 4022, March
2005
7.2. Informative References
Authors' Addresses
Fei Wang
Beijing Institute of Technology
5 South Zhongguancun Street, Haidian District, Beijing, China
Email: fei_wang@bit.edu.cn
Zesong Fei
Beijing Institute of Technology
5 South Zhongguancun Street, Haidian District, Beijing, China
Email: feizesong@bit.edu.cn
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