CN104219029A - A data transmitting method, device and system - Google Patents

Abstract

The present invention discloses a data transmitting method, device and system, wherein the method includes: a terminal selects one or more terminals as assigned terminal(s); and the terminal performs network encoding on the source data thereof and source data sent by the assigned terminal(s), and sends outwards network encoding data. The present invention can reduce the times for retransmitting the data, thereby increasing the data handling capacity of the system, and improving the transmitting efficiency of the system.

Description

A kind of data transmission method, device and system

Technical field

The present invention relates to the communications field, particularly relate to a kind of data transmission method, device and system.

Background technology

In existing cordless communication network, along with the quick increase of mobile terminal (hereinafter referred to as terminal), the business datum demand of terminal is also in explosive growth, and this demand data proposes challenge to current network and operator.Multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology carries out transfer of data by adopting many antennas at transmitting-receiving two-end; MIMO transmission scheme is divided into two large classes, and be transmit diversity and spatial reuse respectively, diversity realizes the reliability transmission of data, the efficiency of transmission of multiplexing raising data, finally realizes the raising of power system capacity and the lifting of spectrum efficiency.

The technical advantage of MIMO be based upon highly incoherent characteristic between each antenna subchannel basis on, and it is at present also very difficult to install the antenna of more than two in terminal, therefore researcher proposes the theory of a series of virtual MIMO (virtual MIMO, V-MIMO).Virtual MIMO solves multiuser MIMO (Multi-User MIMO, MU-MIMO) can not install a large amount of antenna in terminal and a kind of technology of developing; Its principle be adjacent multiple terminals by connecting, using the wherein antenna of the antenna of adjacent end as self, so just realize the transmission of multiple antennas when installing a large amount of antenna without self.

The reception antenna of multiple terminal can be shared by downlink virtual MIMO, form a virtual Single User MIMO (Single-User MIMO, SU-MIMO) receiver, because the interlayer interference of SU-MIMO is lower, can obtain better link performance and larger downlink throughput capacity relative to MU-MIMO, this has very large benefit to improving the communication conditions of user than the hot zones of comparatively dense.Downlink virtual MIMO user thinks the data finally obtained required for self, will share the information received from base station between user, and utilizes these all information to carry out joint demodulation and decoding, just can draw the data required for each user.

, sometimes there is such business demand in the user of same group: needs shared data between all users in group, and each user namely in group needs the data knowing that other users have.The way of the such business demand of usual realization is that each user sends the data of self to other users.Above-mentioned situation can abstractly be with drag:

A network is made up of n node, and a kth node is designated as N _k, each node has exclusive data itself, and will send this exclusive data to other all nodes.The data dissemination of each node was separated from time or frequency resource, and namely each node can not be subject to the interference of other nodes when sending data.

Because the channel condition between user is different and separate, between good two users of channel condition, easily successfully swap data; And between poor two users of channel condition, successfully to then there is certain difficulty by swap data.Exchanges data between the user of bad channel conditions can become the bottleneck of exchanges data between user in whole group.

Data-sharing systems or complete by the link that direct transfers is point-to-point between user in existing group, the link because of bad channel conditions needs repeatedly to retransmit and causes ineffective systems, throughput to reduce; Or carry out data retransmission by intermediate node to have assisted, because of forward need increase the number of transmissions, thus cause ineffective systems, tell the amount of gulping down reduce.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of data transmission method, device and system, can reduce the number of times of data re-transmission, and then improves the data throughout of system, the efficiency of transmission of elevator system.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of data transmission method, described method comprises:

Terminal selects one or more terminal to be designated terminal;

The source data that the source data of self and designated terminal are sent is done network code by terminal, and outwards sends network code data.

Preferably, described terminal is selected one or more terminal to be designated terminal to be:

Terminal chooses the best terminal of self channel condition; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal.

Preferably, described method also comprises:

Before reaching the condition changing designated terminal, designated terminal is kept to immobilize.

Preferably, described method also comprises:

Before each transmission data, reselect designated terminal.

Preferably, described method also comprises:

Terminal, while transmission network code data, also sends following additional information: whether the identity information of designated terminal, designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.

Preferably, described additional information uses the frame head sending packet to indicate; Or,

Described additional information uses signaling to indicate; Or,

Described additional information uses code sequence to indicate.

A kind of data transmission method provided by the invention, described method comprises:

Terminal receives the network code data of other terminal transmission and decodes.

Preferably, described method also comprises:

Terminal also receives source data and the additional information of the transmission of other terminal, and when the packet data part judging to receive according to additional information is as network code data, terminal utilizes network code data to carry out combined decoding with the source data of other terminal received.

A kind of data transmission method provided by the invention, described method comprises:

In group, each terminal selects one or more terminal to be designated terminal respectively, and the source data that the source data of self and designated terminal are sent is done network code by each terminal respectively, and outwards sends network code data;

Each terminal receives the network code data of other terminal transmission respectively and decodes.

The invention provides a kind of terminal, described terminal comprises:

Designated terminal selected cell is designated terminal for selecting one or more terminal;

Network code data transmission unit, does network code for the source data source data of terminal self and designated terminal sent, and outwards sends network code data.

Preferably, described designated terminal selected cell, the terminal that the channel condition specifically for choosing terminal self is best; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal.

The invention provides a kind of terminal, described terminal comprises:

Receiving element, for receiving the network code data that other terminal sends;

Decoding unit, for the network code decoding data received by network code data receipt unit.

Preferably, described receiving element is also for receiving source data and the additional information of the transmission of other terminal;

Accordingly, decoding unit, specifically for when the packet data part judging to receive according to additional information is as network code data, utilizes network code data to carry out combined decoding with the source data of other terminal received.

The invention provides a kind of data transmission system, described system comprises terminal according to claim 10 and terminal according to claim 12.

As from the foregoing, technical scheme of the present invention comprises: terminal selects one or more terminal to be designated terminal; The source data that the source data of self and designated terminal are sent is done network code by terminal, and outwards sends network code data.Thus, the present invention is not when relying on intermediate node auxiliary transmission, and network code data broadcast, by after doing network code with the information of designated terminal, is given other terminal by each terminal.Thus the number of times of data re-transmission can be reduced, and then improve the data throughout of system, the efficiency of transmission of elevator system.

Accompanying drawing explanation

Fig. 1 is the realization flow schematic diagram of data transmission method of the present invention;

Fig. 2 is the structural representation of terminal of the present invention;

Fig. 3 is the structural representation of terminal of the present invention;

Fig. 4 is the transfer of data schematic diagram of data transmission system of the present invention;

Fig. 5 is frame head and the data structure schematic diagram of embodiment one, three, five;

Fig. 6 is the signaling structure schematic diagram of embodiment two, four, six;

Fig. 7 is frame head and the data structure schematic diagram of embodiment seven, nine, 11;

Fig. 8 is the transfer of data schematic diagram after reselecting designated terminal in embodiment seven to ten two;

Fig. 9 is the signaling structure schematic diagram of embodiment eight, ten, 12.

Embodiment

A kind of data transmission method provided by the invention, as shown in Figure 1, described method comprises:

Step 101, terminal select one or more terminal to be designated terminal;

The source data that the source data of self and designated terminal are sent is done network code by step 102, terminal, and outwards sends network code data;

Here, when not receiving the source data that designated terminal is sent, terminal outwards sends self source data; Terminal, while transmission source data, also sends following additional information: whether the identity information of designated terminal, designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user;

Here, described network code (Network Coding) refers to that the intermediate node in network carries out linear or nonlinear process to the data that each bar channel receives, and described network code is divided into two element field exclusive-OR network coding, polynary territory network code, distributed network coding etc.The data received from each bar channel can be described as source data, and the data obtained after network code process can be described as network code data.Two element field exclusive-OR network is encoded, that XOR process two-way source data being carried out two element field obtains network code data, then network code data are sent to receiving node, receiving node only need know a road source data and network code data, these two data just can be utilized to carry out combined decoding (two information carry out two element field XOR), obtain another road source data, this encoding and decoding technique is simple, is easy to realize.

Preferably, described terminal is selected one or more terminal to be designated terminal can be:

Terminal chooses the best terminal of self channel condition; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal;

The index of described channel condition can comprise channel quality instruction (Channel Quality Indicator, CQI), Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) and channel transfer matrix.

Preferably, described method can also comprise:

Before reaching the condition changing designated terminal, keep designated terminal to immobilize, namely do not reselect designated terminal.

Preferably, described method can also comprise:

Before each transmission data, reselect designated terminal.

Preferably, described method can also comprise:

Terminal, while transmission network code data, also sends following additional information: whether the identity information of designated terminal, designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.

Preferably, described additional information uses the frame head sending packet to indicate; Or,

Described additional information uses signaling to indicate; Or,

Described additional information uses code sequence to indicate;

Here, described code sequence can be scrambler sequence or orthogonal code sequence.

A kind of data transmission method provided by the invention, is characterized in that, described method comprises:

Terminal receives the network code data of other terminal transmission and decodes.

Here, when the data received are not network code data, terminal directly obtains the source data of transmitting terminal to the decoding data received; When the data received are network code data, terminal utilizes network code data to carry out combined decoding with the source data of other terminal received.

Preferably, described method also comprises:

Terminal also receives source data and the additional information of the transmission of other terminal, and when the packet data part judging to receive according to additional information is as network code data, terminal utilizes network code data to carry out combined decoding with the source data of other terminal received.

A kind of data transmission method provided by the invention, described method comprises:

In group, each terminal selects one or more terminal to be designated terminal respectively, and the source data that the source data of self and designated terminal are sent is done network code by each terminal respectively, and outwards sends network code data;

Each terminal receives the network code data of other terminal transmission respectively and decodes;

Here, any two or more terminal in group can not designated terminal each other, because the common factor of network code data that the terminal of designated terminal sends each other is empty sets.

Here, each terminal, before the source data not obtaining designated terminal, sends the source data of self; Each terminal, after the source data correctly receiving designated terminal, sends the network code data obtained after the source data of self and the source data of designated terminal make network code.Described network code is the exclusive-OR network coding of two element field.

A kind of terminal provided by the invention, as shown in Figure 2, described terminal comprises:

Designated terminal selected cell is designated terminal for selecting one or more terminal;

Network code data transmission unit, does network code for the source data source data of terminal self and designated terminal sent, and outwards sends network code data.

Preferably, described designated terminal selected cell, the terminal that the channel condition specifically for choosing terminal self is best; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal.

A kind of terminal provided by the invention, as shown in Figure 3, described terminal comprises:

Receiving element, for receiving the network code data that other terminal sends;

Decoding unit, for the network code decoding data received by network code data receipt unit.

Preferably, described receiving element is also for receiving source data and the additional information of the transmission of other terminal;

Accordingly, decoding unit, specifically for when the packet data part judging to receive according to additional information is as network code data, utilizes network code data to carry out combined decoding with the source data of other terminal received.

A kind of data transmission system provided by the invention, comprises above-mentioned two kinds of terminals.

Describe method of the present invention below by some specific embodiments, following embodiment all adopts the exclusive-OR network of two element field to encode.

Embodiment one:

Embodiments of the invention one propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix of the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.8& 0.3& 0.4\\ 0.1& 1& 0.6& 0.5\\ 0.3& 0.2& 1& 0.7\\ 0.9& 0.2& 0.4& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and the Part II of frame head represents that what now send is not network code data, as shown in Figure 5.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 3, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 3, what Part II represented transmission is not network code data, as shown in Figure 5.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment two:

Embodiments of the invention two propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix of the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.8& 0.3& 0.4\\ 0.1& 1& 0.6& 0.5\\ 0.3& 0.2& 1& 0.7\\ 0.9& 0.2& 0.4& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and the Part II of signaling represents that what now send is not network code data, as shown in Figure 6.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1; Terminal 1 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 2 of transmitting terminal; The data that Part II instruction sends are network code data.Terminal 2 does not correctly receive the data of designated terminal 3, and terminal 2 continues the source data b of broadcast self; Terminal 2 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 3 of transmitting terminal; The data that Part II instruction sends are not network code data, as shown in Figure 6.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment three:

Embodiments of the invention three propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: in the present embodiment, the SINR value of each channel is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left(\begin{array}{cccc}*& 7.9& 11.8& 7.3\\ 5.2& *& 6.8& 8.6\\ 16.3& 3.4& *& 7.8\\ 8.4& 10.5& 5.5& *\end{array}\right)$

In actual applications, also channel condition can be judged according to CQI.

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and the Part II of frame head represents that what now send is not network code data, as shown in Figure 5.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 3, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 3, what Part II represented transmission is not network code data, as shown in Figure 5.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment four:

Embodiments of the invention four propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: in the present embodiment, the SINR value of each channel is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left(\begin{array}{cccc}*& 7.9& 11.8& 7.3\\ 5.2& *& 6.8& 8.6\\ 16.3& 3.4& *& 7.8\\ 8.4& 10.5& 5.5& *\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and Part II represents that what now send is not network code data, as shown in Figure 6.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1; Terminal 1 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 2 of transmitting terminal; The data that Part II instruction sends are network code data.Terminal 2 does not correctly receive the data of designated terminal 3, and terminal 2 continues the source data b of broadcast self; Terminal 2 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 3 of transmitting terminal; The data that Part II instruction sends are not network code data, as shown in Figure 6.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment five:

Embodiments of the invention five propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.In actual applications, terminal base station also can being selected to specify.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and Part II represents that what now send is not network code data, as shown in Figure 5.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 3, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 3, what Part II represented transmission is not network code data, as shown in Figure 5.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment six:

Embodiments of the invention six propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and Part II represents that what now send is not network code data, as shown in Figure 6.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1; Terminal 1 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 2 of transmitting terminal; The data that Part II instruction sends are network code data.Terminal 2 does not correctly receive the data of designated terminal 3, and terminal 2 continues the source data b of broadcast self; Terminal 2 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 3 of transmitting terminal; The data that Part II instruction sends are not network code data, as shown in Figure 6.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment seven:

Embodiments of the invention seven propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Each send data before, terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix of the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.8& 0.3& 0.4\\ 0.1& 1& 0.6& 0.5\\ 0.3& 0.2& 1& 0.7\\ 0.9& 0.2& 0.4& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and Part II represents that what now send is not network code data, as shown in Figure 7.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition after each terminal to self renewal, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix after upgrading in the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.9& 0.5& 0.5\\ 0.2& 1& 0.6& 0.7\\ 0.4& 0.6& 1& 0.4\\ 0.7& 0.3& 0.8& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of designated terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 4, what Part II represented transmission is not network code data, as shown in Figure 7.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment eight:

Embodiments of the invention eight propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Each send data before, terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix of the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.8& 0.3& 0.4\\ 0.1& 1& 0.6& 0.5\\ 0.3& 0.2& 1& 0.7\\ 0.9& 0.2& 0.4& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and the Part II of signaling represents that what now send is not network code data, as shown in Figure 9.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition after each terminal to self renewal, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix after upgrading in the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.9& 0.5& 0.5\\ 0.2& 1& 0.6& 0.7\\ 0.4& 0.6& 1& 0.4\\ 0.7& 0.3& 0.8& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If terminal correctly receives the data of the designated terminal of self, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and terminal 1 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 2, and what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, terminal 2 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 4, and what Part II represented transmission is not network code data, as shown in Figure 9.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment nine:

Embodiments of the invention nine propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Before each transmission data, terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: in the present embodiment, the SINR value of each channel is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left(\begin{array}{cccc}*& 7.9& 11.8& 7.3\\ 5.2& *& 6.8& 8.6\\ 16.3& 3.4& *& 7.8\\ 8.4& 10.5& 5.5& *\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and Part II represents that what now send is not network code data, as shown in Figure 7.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition after the renewal of each terminal according to self respectively, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: the SINR value in the present embodiment after each channel renewal is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left(\begin{array}{cccc}*& 7.3& 9.5& 6.9\\ 6.7& *& 7.2& 8.3\\ 11.2& 8.0& *& 6.5\\ 8.1& 6.4& 7.7& *\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of designated terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 4, what Part II represented transmission is not network code data, as shown in Figure 7.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment ten:

Embodiments of the invention ten propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Before each transmission data, terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition of each terminal respectively according to self, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: in the present embodiment, the SINR value of each channel is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left(\begin{array}{cccc}*& 7.9& 11.8& 7.3\\ 5.2& *& 6.8& 8.6\\ 16.3& 3.4& *& 7.8\\ 8.4& 10.5& 5.5& *\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and the Part II of signaling represents that what now send is not network code data, as shown in Figure 9.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 arrive the channel condition after the renewal of each terminal according to self respectively, select self to arrive the designated terminal of the poorest terminal of other terminal channel condition as self.As: the SINR value in the present embodiment after each channel renewal is as follows, and GC group connector n is to the SINR of other terminal links respectively for the n-th column element, and unit is that dB, * represent that this value is for empty, and SINR value is less, and channel condition is poorer:

$\left[\begin{array}{cccc}*& 7.3& 9.5& 6.9\\ 6.7& *& 7.2& 8.3\\ 11.2& 8.0& *& 6.5\\ 8.1& 6.4& 7.7& *\end{array}\right]$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If terminal correctly receives the data of the designated terminal of self, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and terminal 1 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 2, and what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, terminal 2 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 4, and what Part II represented transmission is not network code data, as shown in Figure 9.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the network code data of terminal 4 therefore terminal 1 passes through formula obtain the source data c of terminal 3, terminal 1 passes through formula again obtain the source data d of terminal 4; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment 11:

Embodiments of the invention 11 propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, the data that each terminal sends comprise a frame head, described frame head comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Before each transmission data, terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and Part II represents that what now send is not network code data, as shown in Figure 7.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Before again sending data, terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and before data, add following frame head during transmission: frame head Part I is the identity identification information of designated terminal 2, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 4, what Part II represented transmission is not network code data, as shown in Figure 7.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment 12:

Embodiments of the invention ten propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, each terminal sends signaling at control channel to other-end, described signaling comprises following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Before each transmission data, terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal, as shown in Figure 4.In upper once transmission, each terminal needs the designated terminal redefining self correspondence according to said method.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and the Part II of signaling represents that what now send is not network code data, as shown in Figure 9.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Before again sending data, terminal 1, terminal 2, terminal 3, terminal 4 respectively Stochastic choice terminal are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 4 is self designated terminal, and terminal 3 determines that terminal 2 is self designated terminal, and terminal 4 determines that terminal 3 is self designated terminal, as shown in Figure 8.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal.If terminal correctly receives the data of the designated terminal of self, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data network code data broadcast is given other terminal by terminal 1, and terminal 1 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 2, and what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 4, terminal 2 continues the source data b of broadcast self, terminal 2 also sends signaling at control channel to other-end: signaling Part I is the identity identification information of terminal 4, and what Part II represented transmission is not network code data, as shown in Figure 9.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the network code data of terminal 4 therefore terminal 1 passes through formula obtain the source data c of terminal 3, terminal 1 passes through formula again obtain the source data d of terminal 4; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment 13:

Embodiments of the invention 13 propose in the virtual MIMO structure of four terminal compositions, terminal room is by network coding technique of the present invention, complete the process of sharing data transmission, in the present embodiment, use code sequence (as: scrambler sequence, orthogonal code sequence) to indicate following additional information: whether the identity information of designated terminal and designation data bag data division are the information of network code data, described identity information refers to can the information of unique identification user.Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.As shown in Figure 4:

Terminal 1, terminal 2, terminal 3, terminal 4, respectively according to the channel condition of each terminal to self, select other terminal to the designated terminal of the best terminal of own channel condition as self.As: the channel transfer matrix of the present embodiment is as follows, and n-th line element represents the channel transfer value of other terminal-to-terminal service n respectively, and the element value in channel transfer matrix is larger, represents that this channel condition is better:

$\left(\begin{array}{cccc}1& 0.8& 0.3& 0.4\\ 0.1& 1& 0.6& 0.5\\ 0.3& 0.2& 1& 0.7\\ 0.9& 0.2& 0.4& 1\end{array}\right)$

Terminal 1, according to said method, determines that terminal 2 is self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4 broadcast the data a shared, b, c, d respectively in the resource of self, and other terminal receives.During the data that each terminal sends, use different code sequence pair data to process, indicate the identity of the designated terminal of transmitting terminal and designation data to be network code data with this.Code sequence A, code sequence B, code sequence C, code sequence D counterpart terminal 1, terminal 2, terminal 3, terminal 4 respectively.Each terminal when first time sends data, transmission be self source data, so use the code sequence pair data of self correspondence to process, as terminal 1 uses code sequence 1 to process the data sent.

Each terminal receives the data of other terminal broadcast.Terminal by identification code sequence obtain designated terminal corresponding to transmitting terminal identity information, judge whether data are network code data.The data that each terminal first time receives all pass through the code series processing corresponding with transmitting terminal identity, and what illustrate that each terminal receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then use the code sequence pair network code data corresponding with designated terminal identity to process, then give other terminal by the network code data broadcast after process; If correctly do not receive the data of designated terminal, then use the code sequence pair source data corresponding with transmitting terminal identity to process, then broadcast the source data of self.As: terminal 1 correctly receives the source data b of designated terminal 2, and the network code that the data of the data of self and terminal 2 are carried out two element field by terminal 1 generates and sends data then use code sequence 2 pairs of network code data corresponding with terminal 2 identity to process, the network code data broadcast after process is given other terminal by terminal 1 again.Terminal 2 does not correctly receive the data of designated terminal 3, and terminal 2 uses code sequence 2 pair source data b process corresponding with terminal 2 identity, the source data then after broadcast process.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal by identification code sequence obtain designated terminal corresponding to transmitting terminal identity information, judge whether data are network code data.If code sequence numbering is consistent with terminal number, illustrate that what receive is not network code data, terminal directly obtains the source data of transmitting terminal to the decoding data received.If code sequence numbering and terminal number inconsistent, illustrate and receive network code data, and transmitting terminal corresponding designated terminal numbering identical with code sequence numbering.Terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 1 correctly receives the data b of designated terminal 2, does not correctly receive the data c that terminal 3 sends, but correctly receives the network code data of terminal 3 with the source data d of terminal 4, therefore terminal 1 passes through formula obtain the source data c of terminal 3; Terminal 1 obtains the source data b of other terminal by the method, c, d.The process situation of other terminal is similar.

Embodiment 14:

Embodiments of the invention 14 propose in the virtual MIMO structure of six terminal compositions, and terminal room, by network coding technique of the present invention, completes the process of sharing data transmission.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, the terminal 6 respectively one or more terminal of Stochastic choice are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 and terminal 4 are self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 5 is self designated terminal, terminal 5 determines that terminal 6 is self designated terminal, and terminal 6 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6 broadcast the data a shared respectively in the resource of self, and other terminal of b, c, d, e, f receives.The data that each terminal sends also comprise such frame head: frame head comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends data, and Part II represents that what now send is not network code data.

Each terminal receives the data of other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.The packet frame head designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6 judge whether the data correctly receiving self designated terminal; If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then other terminal is given by network code data broadcast, the data sent comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is network code data; If correctly do not receive the data of designated terminal, then continue the source data of broadcast self, the data of transmission comprise above-mentioned frame head equally, and what now the Part II of frame head represented transmission is not network code data.As: terminal 1 correctly receive designated terminal 2 and or terminal 4 source data b and or d, terminal 1 by the data of self and terminal 2 and or the data of terminal 4 network code that carries out two element field generate and send data or or network code data broadcast is given other terminal by terminal 1, adds following frame head during transmission before data: frame head Part I be terminal 2 identity identification information and or the identity identification information of terminal 4, what Part II represented transmission is network code data.Terminal 2 does not correctly receive the data of designated terminal 3, terminal 2 continues the source data b of broadcast self, before data, add following frame head during transmission: frame head Part I is the identity identification information of terminal 3, what Part II represented transmission is not network code data.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.Terminal, by packet frame head, obtains the identity information of designated terminal corresponding to transmitting terminal, judges whether packet data part is network code data.If packet frame head designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If packet frame head designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 2 correctly receives the source data a of designated terminal 1, does not correctly receive the data d that terminal 4 sends, but correctly receives again the network code data of terminal 1 therefore terminal 2 passes through formula obtain the source data d of terminal 4; The process situation of other terminal is similar.

Embodiment 15:

Embodiments of the invention 15 propose in the virtual MIMO structure of six terminal compositions, and terminal room, by network coding technique of the present invention, completes the process of sharing data transmission.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, the terminal 6 respectively one or more terminal of Stochastic choice are the designated terminal of self.If: terminal 1 is according to said method, determine that terminal 2 and terminal 4 are self designated terminal; In like manner, terminal 2 determines that terminal 3 is self designated terminal, and terminal 3 determines that terminal 4 is self designated terminal, and terminal 4 determines that terminal 5 is self designated terminal, terminal 5 determines that terminal 6 is self designated terminal, and terminal 6 determines that terminal 1 is self designated terminal.Once selected, the designated terminal that each terminal is corresponding in transmission afterwards remains unchanged.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6 broadcast the data a shared respectively in the resource of self, and other terminal of b, c, d, e, f receives.Each terminal also will send following signaling at control channel to other-end: signaling comprises two parts, and Part I is the identity identification information of the designated terminal of transmitting terminal; Whether the data that Part II instruction sends are network code data, and each terminal is when first time sends signaling, and Part II represents that what now send is not network code data.

Each terminal receives the data of other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.The signaling designation data bag data division that each terminal first time receives is not network code data, and terminal directly obtains the data of transmitting terminal to the decoding data received.

Terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6 judge whether the data correctly receiving self designated terminal.If correctly receive the data of designated terminal, the source data of self and the data of the designated terminal received are carried out the exclusive-OR network coded treatment of two element field, then give other terminal by network code data broadcast; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are network code data.If correctly do not receive the data of designated terminal, then continue the source data of broadcast self; Terminal also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal of transmitting terminal; The data that Part II instruction sends are not network code data.As: terminal 1 correctly receive designated terminal 2 and or terminal 4 source data b and or d, terminal 1 by the data of self and terminal 2 and or the data of terminal 4 network code that carries out two element field generate and send data or or network code data broadcast is given other terminal by terminal 1, and terminal 1 also will send following signaling at control channel to other-end: signaling Part I be terminal 2 identity identification information and or the identity identification information of terminal 4; The data that Part II instruction sends are network code data.Terminal 2 does not correctly receive the data of designated terminal 3, and terminal 2 continues the source data b of broadcast self; Terminal 2 also will send following signaling at control channel to other-end: signaling Part I is the identity identification information of the designated terminal 3 of transmitting terminal; The data that Part II instruction sends are not network code data.The process situation of other terminal is similar.

Each terminal continues the data receiving other terminal broadcast.The signaling that terminal receives from control channel obtain designated terminal corresponding to transmitting terminal identity information, judge whether packet data part is network code data.If signaling designation data bag data division is not network code data, terminal directly obtains the data of transmitting terminal to the decoding data received.If signaling designation data bag data division is network code data, terminal utilizes network code data and receives the data that other terminal sends and carry out combined decoding.As: terminal 2 correctly receives the source data a of designated terminal 1, does not correctly receive the data d that terminal 4 sends, but correctly receives again the network code data of terminal 1 therefore terminal 2 passes through formula obtain the source data d of terminal 4; The process situation of other terminal is similar.

Data sharing model between user in the group that the present invention forms multiple terminal, the data transmission method adopting network code is proposed, namely when not relying on intermediate node auxiliary transmission, network code data broadcast, by after doing network code with the information of designated terminal, is given other terminal by each terminal; This method solve the data sharing problem between user under this network architecture, can reduce the number of times of data re-transmission, improve the data throughout of this network model, elevator system efficiency of transmission, improves network congestion.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.

Claims (14)

1. a data transmission method, is characterized in that, described method comprises:

Terminal selects one or more terminal to be designated terminal;

The source data that the source data of self and designated terminal are sent is done network code by terminal, and outwards sends network code data.

2. method according to claim 1, is characterized in that, described terminal is selected one or more terminal to be designated terminal to be:

Terminal chooses the best terminal of self channel condition; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal.

3. method according to claim 1, is characterized in that, described method also comprises:

Before reaching the condition changing designated terminal, designated terminal is kept to immobilize.

4. method according to claim 1, is characterized in that, described method also comprises:

Before each transmission data, reselect designated terminal.

5. method according to claim 1, is characterized in that, described method also comprises:

Terminal, while transmission network code data, also sends following additional information: whether the identity information of designated terminal, designation data bag data division are the information of network code data, and described identity information refers to can the information of unique identification user.

6. method according to claim 5, is characterized in that, described additional information uses the frame head sending packet to indicate; Or,

Described additional information uses signaling to indicate; Or,

Described additional information uses code sequence to indicate.

7. a data transmission method, is characterized in that, described method comprises:

Terminal receives the network code data of other terminal transmission and decodes.

8. method according to claim 7, is characterized in that, described method also comprises:

Terminal also receives source data and the additional information of the transmission of other terminal, and when the packet data part judging to receive according to additional information is as network code data, terminal utilizes network code data to carry out combined decoding with the source data of other terminal received.

9. a data transmission method, is characterized in that, described method comprises:

In group, each terminal selects one or more terminal to be designated terminal respectively, and the source data that the source data of self and designated terminal are sent is done network code by each terminal respectively, and outwards sends network code data;

Each terminal receives the network code data of other terminal transmission respectively and decodes.

10. a terminal, is characterized in that, described terminal comprises:

Designated terminal selected cell is designated terminal for selecting one or more terminal;

Network code data transmission unit, does network code for the source data source data of terminal self and designated terminal sent, and outwards sends network code data.

11. terminals according to claim 10, is characterized in that, described designated terminal selected cell, the terminal that the channel condition specifically for choosing terminal self is best; Or,

Select self to arrive the poorest terminal of other-end channel condition; Or,

Select the terminal that base station is specified; Or,

Selecting one or more terminal randomly, is designated terminal.

12. 1 kinds of terminals, is characterized in that, described terminal comprises:

Receiving element, for receiving the network code data that other terminal sends;

Decoding unit, for the network code decoding data received by network code data receipt unit.

13. terminals according to claim 12, is characterized in that, described receiving element is also for receiving source data and the additional information of the transmission of other terminal;

Accordingly, decoding unit, specifically for when the packet data part judging to receive according to additional information is as network code data, utilizes network code data to carry out combined decoding with the source data of other terminal received.

14. 1 kinds of data transmission systems, is characterized in that, described system comprises terminal according to claim 10 and terminal according to claim 12.