CN105072688A - Information transmission method and device for multi-relay cognitive wireless network - Google Patents

Abstract

The invention provides an information transmission method and device for a multi-relay cognitive wireless network. The method comprises the steps that: a relay node learns the type to which the relay node belongs according to that whether the relay node can correctly decode master information and/or slave information, judges that whether the communication of a slave user influences the decoding of the master information performed by the relay node according to the own type of the relay node, and sends feedback information including the judging result to the slave user in a preset sending manner; the different types of relay nodes have different sending manners, so that after receiving the feedback information sent by the all relay nodes, the user sends the slave information to the all relay nodes when determining that all feed information show that the communication of the slave user does not influence the decoding of the master information performed by the relay node and that the relay node which can correctly decode the slave information exists. At last the relay node performs power distribution on the received master information and the salve information and sends according to that whether the user receiving terminal can decode the master information correctly. Thereby, the best system performance is achieved.

Description

The information transferring method of many relayings cognition wireless network and device

Technical field

The present invention relates to communication technical field, particularly relate to a kind of information transferring method and device of many relayings cognition wireless network.

Background technology

Deficient for current frequency spectrum resource, and the incomplete present situation of spectrum utilization, cognition wireless network technology is arisen at the historic moment, and causes the extensive concern of international community, the appearance of cognition wireless network, can improve the availability of frequency spectrum and the power system capacity of existing communication network.Cognition wireless network is made up of master network and cognition network, master network refers to existing communication network, user in master network is authorized in a certain band operation, cognition network is the network without authorized frequency bands, and the user in cognition network carrys out the frequency band of having authorized in shared master network by the cognitive function that it possesses.The user of identical frequency band is used to be called primary user's (comprising main transmitting terminal and main receiving terminal) and from user's (comprising from transmitting terminal with from receiving terminal) in master network and in cognition network.In cognition wireless network, primary user does not know the existence from user, and the impact added primary user's communication of self will be avoided as far as possible from user, primary user is communicated by the mode of broadcast with from user, therefore both there is primary user to the interference from user, also exist from the interference of user to primary user, the former can be eliminated by dirty paper code.When there is multiple via node in cognition wireless network, this cognition wireless network is called many relayings cognition wireless network, wherein, multiple via node helps primary user and/or the information from user's relay transmission, primary user's transmitting terminal and from user's transmitting terminal as information source node, primary user's receiving terminal and from user's receiving terminal as information destination node.

In the information transmission scheme of existing many relayings cognition wireless network, the first is the information that via node transmits primary user only or the information transmitted only from user, under this transmission means, if via node only transmits primary user's information, limited from the transmission rate of user, cannot make full use of the frequency spectrum resource of redundancy, frequency spectrum resource utilization rate is not high; If only transmit from user profile, larger interference may be caused to primary user's communication.The second is via node transmission primary user's information and the linear combination from user profile, namely transmits the information of master-slave user simultaneously, no matter network condition under this transmission means, the information of transmission master-slave user is fixed, and can not reach optimum systematic function.

Therefore, how realizing, under the prerequisite not affecting primary user's communication, sending from user profile as much as possible, and then improve frequency spectrum resource utilization rate, is a problem needing solution badly.

Summary of the invention

The invention provides a kind of information transferring method and device of many relayings cognition wireless network, can realize, under the prerequisite not affecting primary user's communication, sending as much as possible from user profile, to make full use of the system resource of redundancy, and then raising frequency spectrum resource utilization rate, reach optimum systematic function.

First aspect, the invention provides a kind of information transferring method of many relayings cognition wireless network, comprising:

Can via node the main information of correct decoding and/or know affiliated via node classification from information according to self;

The via node classification of described via node belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, and with the send mode preset to sending the feedback information comprising judged result from user, the send mode of different classes of via node is different, with make described receive from user the feedback information that all via nodes send after, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time send from information to all via nodes,

Receive main information and after information, can described via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

Further, can described via node the main information of correct decoding and/or before knowing affiliated via node classification from information according to self, also comprises:

Described via node carries out channel estimating, obtains the noise variance N that described via node receives _land the channel power gain g of primary user's transmitting terminal and described via node _pl, described via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and described via node _sl, described via node with from the channel power gain g of user's receiving terminal _ls;

Can described via node the main information of correct decoding and/or know affiliated via node classification from information according to self, comprising:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of described via node energy correct decoding and from information, described via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then described via node can only the main information of correct decoding and can not translate from information, and described via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can only translate from information, and described via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can not translate from information, and described via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

Further, the via node classification of described via node belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, comprising:

Described via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of described via node to main information can not be affected from the communication of user;

When described via node is Equations of The Second Kind via node, if then can not affect the decoding of described via node to main information from the communication of user, otherwise the decoding of described via node to main information can be affected from the communication of user.

Further, can described via node the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal, also comprises:

Described via node determines that can primary user's receiving terminal the main information of correct decoding, is specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of described via node.

Further, can described via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, comprising:

Primary user's receiving terminal can not correct decoding main information time, the power that described via node sends main information is 0, send from the power of information be P _l;

During the main information of primary user's receiving terminal energy correct decoding, the power that described via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l;

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

Second aspect, the invention provides a kind of via node, comprising:

Can determination module, for the main information of correct decoding and/or know affiliated via node classification from information according to self;

Judge module, judges whether can affect the decoding of described via node to main information from the communication of user for the via node classification belonging to self;

Sending module, for comprising the feedback information of judged result with the send mode preset to sending from user, the send mode of different classes of via node is different, with make described receive from user the feedback information that all via nodes send after, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time to the transmission of all via nodes from information;

Receiver module, for receiving main information and from information;

Described sending module also for: can the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

Further, described via node also comprises:

Can acquisition module, for the main information of correct decoding and/or before know affiliated via node classification from information according to self at described determination module, carry out channel estimating, obtain the noise variance N that described via node receives _land the channel power gain g of primary user's transmitting terminal and described via node _pl, described via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and described via node _sl, described via node with from the channel power gain g of user's receiving terminal _ls;

Can described determination module the main information of correct decoding and/or know affiliated via node classification from information according to self, comprising:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of described via node energy correct decoding and from information, described via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then described via node can only the main information of correct decoding and can not translate from information, and described via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can only translate from information, and described via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can not translate from information, and described via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

Further, the via node classification of described judge module belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, comprising:

Described via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of described via node to main information can not be affected from the communication of user;

When described via node is Equations of The Second Kind via node, if then can not affect the decoding of described via node to main information from the communication of user, otherwise the decoding of described via node to main information can be affected from the communication of user.

Further, described determination module also for: can the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal at described sending module, determine that can primary user's receiving terminal the main information of correct decoding, be specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of described via node.

Further, can described sending module the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, comprising:

Primary user's receiving terminal can not correct decoding main information time, the power that described via node sends main information is 0, send from the power of information be P _l;

During the main information of primary user's receiving terminal energy correct decoding, the power that described via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l;

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

The information transferring method of many relayings cognition wireless network provided by the invention and device, first can the main information of correct decoding and/or know affiliated via node classification from information according to self by via node, can judge whether can affect the decoding of via node to main information from the communication of user after the classification of acquiring relay node, then comprise the feedback information of judged result with the send mode preset to sending from user, the send mode of different classes of via node is different.Make from user receive feedback information that all via nodes send all after, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time to the transmission of all via nodes from information.Can last via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.Thus achieve under the prerequisite not affecting primary user's communication, send as much as possible from user profile, to make full use of the system resource of redundancy, and then improve frequency spectrum resource utilization rate, reach optimum systematic function.

Accompanying drawing explanation

In order to be illustrated more clearly in the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the flow chart of the information transferring method embodiment one of the present invention's many relayings cognition wireless network;

Fig. 2 is system model figure of the present invention;

Fig. 3 is the structural representation of via node embodiment one of the present invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 1 is the flow chart of the information transferring method embodiment one of the present invention's many relayings cognition wireless network, and as shown in Figure 1, the method for the present embodiment can comprise:

Can S101, via node the main information of correct decoding and/or know affiliated via node classification from information according to self.

Wherein, main information is the information source information of primary user, from the information source information that information is from user, particularly, can via node the main information of correct decoding and/or before knowing affiliated via node classification from information according to self, first carry out channel estimating, obtain the noise variance N that via node receives _land the channel power gain g of primary user's transmitting terminal and via node _pl, via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and via node _sl, via node and the channel power gain g from user's receiving terminal _ls.

Then, make the following judgment:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of via node energy correct decoding and from information, via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then via node can only the main information of correct decoding and can not translate from information, and via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can only translate from information, and via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can not translate from information, and via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

S102, the via node classification of via node belonging to self judges whether can affect the decoding of via node to main information from the communication of user, and with the send mode preset to sending the feedback information comprising judged result from user, the send mode of different classes of via node is different, after making receiving the feedback information of all via nodes transmission from user, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time send from information to all via nodes.

Particularly, via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of via node to main information can not be affected from the communication of user.When via node is Equations of The Second Kind via node, if then can not affect the decoding of via node to main information from the communication of user, otherwise the decoding of via node to main information can be affected from the communication of user.Reason is:

First kind via node, under the hypothesis sending information from user, can translate main information simultaneously and from information, therefore can not be subject to the impact from telex network to the decoding of main information; For Equations of The Second Kind via node, owing to not translating from information, if send information from user, will noise be regarded as from information, unaffected to the decoding of main information to ensure, need meet condition; For the 3rd class via node and the 4th class via node, due to main information can not be translated, so impact can not be had on the decoding of main information from telex network.

Whether relay node judges goes out can affect via node to after the decoding of main information from the communication of user, with the send mode preset to sending the feedback information comprising judged result from user, the send mode of different classes of via node is different, feedback information can indicate with " 1 " or " 0 ", such as send " 1 " expression and can not affect the decoding of via node to main information from the communication of user, allow from telex network, send " 0 " expression and can affect the decoding of via node to main information from the communication of user, do not allow from telex network.After arranging like this, from user after the feedback information receiving the transmission of all via nodes, to send from information to via node when there is via node (first kind via node or the 3rd class via node can translate) that can correctly translate from information when all feedback informations determining to receive are all " 1 ", because the send mode of different classes of via node is different, according to the classification of the feedback information acquiring relay node received, thus the via node existing and can correctly translate from information can be known whether from user.

S103, receive main information and after information, can via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

Particularly, can via node the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal, also comprises:

Via node determines that can primary user's receiving terminal the main information of correct decoding, is specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of via node, it should be noted that, all via nodes all can know the N of other via node _s, P _land g _lp, the mode known can be the N of via node to other relay node broadcasts self _s, P _land g _lpetc. information.

And then can via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, is specially:

Primary user's receiving terminal can not correct decoding main information time, the power that via node sends main information is 0, send from the power of information be P _l.

During the main information of primary user's receiving terminal energy correct decoding, the power that via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l.

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

According to above-mentioned transmit power assignment, can realize, under the prerequisite not affecting primary user's communication, sending from user profile as much as possible, and then improve frequency spectrum resource utilization rate, reach optimum systematic function.

After the second stage of system communication terminates, master and slave receiving terminal all adopts the mode of maximum-ratio combing, is merged by the signal that different via node sends over.Maximum-ratio combing principle is that each bar branch road weight coefficient is directly proportional to this branch road signal to noise ratio, and signal to noise ratio is larger, and weight coefficient is larger, is combined rear signal contribution also larger.Adopt maximum-ratio combing can obtain maximum output signal-to-noise ratio.Main receiving terminal is considered as noise processed by what receive from information, owing to have employed dirty paper code from transmitting terminal, can not be subject to the interference of main information from receiving terminal.

The information transferring method of many relayings cognition wireless network that the present embodiment provides, first can the main information of correct decoding and/or know affiliated via node classification from information according to self by via node, can judge whether can affect the decoding of via node to main information from the communication of user after the classification of acquiring relay node, then comprise the feedback information of judged result with the send mode of the via node classification preset to sending from user, the send mode of different classes of via node is different.After making to receive from user the feedback information that all via nodes send, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time to via node transmission from information.Can last via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.Thus achieve under the prerequisite not affecting primary user's communication, send as much as possible from user profile, to make full use of the system resource of redundancy, and then improve frequency spectrum resource utilization rate, reach optimum systematic function.

Adopt a specific embodiment below, the technical scheme of embodiment of the method shown in Fig. 1 is described in detail.

Fig. 2 is system model figure of the present invention, as shown in Figure 2, and S ₁-D ₁represent the transmission-receiving terminal of primary user, S ₂-D ₂represent the transmission-receiving terminal from user, R={R ₁, R ₂..., R _lrepresent L half-duplex via node (half-duplex: can not send simultaneously and receive).Each channel is additive white gaussian noise channels, separate between each noise, R _l(1≤l≤L), D ₁, D ₂the noise variance received is respectively N _l, N _pand N _s.{ h _ijthe channel coefficients of respective links in representative graph, main information is x _p, primary user's transmission rate is R _p, primary user's transmitted power is P _p; Be x from information _s, be R from user's transmission rate _s, be P from user's transmitted power _s.The transmitted power of each via node is { P _l, the sequence number of the corresponding via node of l.Channel capacity unit is bits/s/Hz, and wherein L is via node number, and x is received signal to noise ratio.

System communication processes is divided into two stages, first stage main transmitting terminal S ₁always send information, from transmitting terminal S to via node ₂only can communicate when allowing; Second stage via node sends information, main receiving terminal D ₁always receive, if having sent information from user in the first stage, then from receiving terminal D ₂also receive, otherwise from receiving terminal D ₂do not work.All process of transmittings carry out with the form of broadcast.

The following detailed description of the process of the information transmission in system shown in Figure 2, specific as follows:

Main transmitting terminal S ₁always send information, from transmitting terminal S to via node ₂only information can be sent when following permission.

S201, via node carry out channel estimating, obtain N _l, channel power gain g _pl, channel power gain g _lp, channel power gain g _slwith channel power gain g _ls,

Can S202, via node the main information of correct decoding and/or know affiliated via node classification from information according to self.Be specially:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of via node energy correct decoding and from information, via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then via node can only the main information of correct decoding and can not translate from information, and via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can only translate from information, and via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can not translate from information, and via node is the 4th class via node.

S203, the via node via node classification belonging to self judges whether can affect the decoding of via node to main information from the communication of user, and with the send mode preset to sending the feedback information comprising judged result from user, the send mode of different classes of via node is different.

S204, from user after receiving the feedback information that all via nodes send, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and determine to there is the via node that can correctly translate from information time to via node transmission from information.

Feedback information can indicate with " 1 " or " 0 ", such as send " 1 " expression and can not affect the decoding of via node to main information from the communication of user, allow from telex network, sending " 0 " expression can affect the decoding of via node to main information from the communication of user, does not allow from telex network.After arranging like this, from user after the feedback information receiving the transmission of all via nodes, because the send mode of different classes of via node is different, to send from information to via node when there is via node (first kind via node or the 3rd class via node can translate) that can correctly translate from information from user when all feedback informations determining to receive are all " 1 ", because the send mode of different classes of via node is different, can according to the classification of the feedback information acquiring relay node received from user, thus know whether the via node existing and can correctly translate from information.

S205, receive main information and after information, can via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

Particularly, first via node determines that can primary user's receiving terminal the main information of correct decoding, is specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of via node, it should be noted that, all via nodes all can know the N of other via node _s, P _land g _lp, the mode known can be the N of via node to other relay node broadcasts self _s, P _land g _lpetc. information.

And then, primary user's receiving terminal can not correct decoding main information time, the power that via node sends main information is 0, send from the power of information be P _l.During the main information of primary user's receiving terminal energy correct decoding, the power that via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l.

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

According to above-mentioned transmit power assignment, can realize, under the prerequisite not affecting primary user's communication, sending from user profile as much as possible, and then improve frequency spectrum resource utilization rate, reach optimum systematic function.

S206, after the second stage of system communication terminates, master and slave receiving terminal all adopts the mode of maximum-ratio combing, is merged by the signal that different via node sends over.

Fig. 3 is the structural representation of via node embodiment one of the present invention, as shown in Figure 3, the device of the present embodiment can comprise: determination module 11, judge module 12, sending module 13 and receiver module 14, wherein, can determination module 11 for the main information of correct decoding and/or know affiliated via node classification from information according to self.Judge module 12 judges whether can affect the decoding of via node to main information from the communication of user for the via node classification belonging to self.Sending module 13 is for comprising the feedback information of judged result with the send mode preset to sending from user, the send mode of different classes of via node is different, after making receiving from user the feedback information that all via nodes send, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time to the transmission of all via nodes from information.Receiver module 14 is for receiving main information and from information.Sending module 13 also for: can the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

Further, via node also comprises: acquisition module, can this acquisition module is used for the main information of correct decoding and/or before know affiliated via node classification from information according to self at determination module 11, carries out channel estimating, obtain the noise variance N that via node receives _land the channel power gain g of primary user's transmitting terminal and via node _pl, via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and via node _sl, via node and the channel power gain g from user's receiving terminal _ls;

Can determination module 11 the main information of correct decoding and/or know affiliated via node classification from information according to self, is specially:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of via node energy correct decoding and from information, via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then via node can only the main information of correct decoding and can not translate from information, and via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can only translate from information, and via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then via node can not the main information of correct decoding can not translate from information, and via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

Further, the via node classification of judge module 12 belonging to self judges whether can affect the decoding of via node to main information from the communication of user, is specially:

Via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of via node to main information can not be affected from the communication of user;

When via node is Equations of The Second Kind via node, if then can not affect the decoding of via node to main information from the communication of user, otherwise the decoding of via node to main information can be affected from the communication of user.

Further, determination module 11 also for: can the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal at sending module 13, determine that can primary user's receiving terminal the main information of correct decoding, be specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding.

time, determine the main information of primary user's receiving terminal energy correct decoding.

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of via node.

Further, can sending module 13 the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, is specially:

Primary user's receiving terminal can not correct decoding main information time, the power that via node sends main information is 0, send from the power of information be P _l.During the main information of primary user's receiving terminal energy correct decoding, the power that via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l.Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

The via node of the present embodiment, may be used for the technical scheme performing embodiment of the method shown in Fig. 1, it realizes principle and technique effect is similar, repeats no more herein.

One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.

Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (10)

1. an information transferring method for the cognition wireless network of relaying more than, is characterized in that, comprising:

Can via node the main information of correct decoding and/or know affiliated via node classification from information according to self;

The via node classification of described via node belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, and with the send mode preset to sending the feedback information comprising judged result from user, the send mode of different classes of via node is different, with make described receive from user the feedback information that all via nodes send after, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time send from information to all via nodes,

Receive main information and after information, can described via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

2. method according to claim 1, is characterized in that, can described via node the main information of correct decoding and/or before knowing affiliated via node classification from information according to self, also comprises:

Described via node carries out channel estimating, obtains the noise variance N that described via node receives _land the channel power gain g of primary user's transmitting terminal and described via node _pl, described via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and described via node _sl, described via node with from the channel power gain g of user's receiving terminal _ls;

Can described via node the main information of correct decoding and/or know affiliated via node classification from information according to self, comprising:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of described via node energy correct decoding and from information, described via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then described via node can only the main information of correct decoding and can not translate from information, and described via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can only translate from information, and described via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can not translate from information, and described via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

3. method according to claim 2, is characterized in that, the via node classification of described via node belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, comprising:

Described via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of described via node to main information can not be affected from the communication of user;

When described via node is Equations of The Second Kind via node, if then can not affect the decoding of described via node to main information from the communication of user, otherwise the decoding of described via node to main information can be affected from the communication of user.

4. method according to claim 2, is characterized in that, can described via node the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal, also comprises:

Described via node determines that can primary user's receiving terminal the main information of correct decoding, is specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of described via node.

5. method according to claim 4, is characterized in that, can described via node the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, comprising:

Primary user's receiving terminal can not correct decoding main information time, the power that described via node sends main information is 0, send from the power of information be P _l;

During the main information of primary user's receiving terminal energy correct decoding, the power that described via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l;

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.

6. a via node, is characterized in that, comprising:

Can determination module, for the main information of correct decoding and/or know affiliated via node classification from information according to self;

Judge module, judges whether can affect the decoding of described via node to main information from the communication of user for the via node classification belonging to self;

Sending module, for comprising the feedback information of judged result with the send mode preset to sending from user, the send mode of different classes of via node is different, with make described receive from user the feedback information that all via nodes send after, determine all feedback informations be all from the communication of user can not affect via node to the decoding of main information and there is the via node that can correctly translate from information time to the transmission of all via nodes from information;

Receiver module, for receiving main information and from information;

Described sending module also for: can the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, and the main information arrived according to the transmitted power transmission and reception distributed and from information.

7. via node according to claim 6, is characterized in that, described via node also comprises:

Can acquisition module, for the main information of correct decoding and/or before know affiliated via node classification from information according to self at described determination module, carry out channel estimating, obtain the noise variance N that described via node receives _land the channel power gain g of primary user's transmitting terminal and described via node _pl, described via node and primary user's receiving terminal channel power gain g _lp, from the channel power gain g of user's transmitting terminal and described via node _sl, described via node with from the channel power gain g of user's receiving terminal _ls;

Can described determination module the main information of correct decoding and/or know affiliated via node classification from information according to self, comprising:

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l}\right),R_p+R_s\≤C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ The then main information of described via node energy correct decoding and from information, described via node is first kind via node;

If $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l}\right),$ Or $R_p\≤C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_p+R_s>C\left(\frac{g_{pl}{P}_p+g_{sl}{P}_s}{N_l}\right),$ Then described via node can only the main information of correct decoding and can not translate from information, and described via node is Equations of The Second Kind via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s\≤C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can only translate from information, and described via node is the 3rd class via node;

If $R_p>C\left(\frac{g_{pl}{P}_p}{N_l}\right),R_s>C\left(\frac{g_{sl}{P}_s}{N_l+g_{pl}{P}_p}\right),$ Then described via node can not the main information of correct decoding can not translate from information, and described via node is the 4th class via node;

Wherein, R _pfor primary user's transmission rate, P _pfor primary user's transmitted power, R _sfor from user's transmission rate, P _sfor from user's transmitted power, C is channel capacity, l is the number of all via nodes, and x is received signal to noise ratio.

8. via node according to claim 7, is characterized in that, the via node classification of described judge module belonging to self judges whether can affect the decoding of described via node to main information from the communication of user, comprising:

Described via node be first kind via node or the 3rd class via node or the 4th class via node time, the decoding of described via node to main information can not be affected from the communication of user;

When described via node is Equations of The Second Kind via node, if then can not affect the decoding of described via node to main information from the communication of user, otherwise the decoding of described via node to main information can be affected from the communication of user.

9. via node according to claim 7, it is characterized in that, described determination module also for: can the main information that receives of the main information butt joint of correct decoding and before distributing from the transmitted power of information according to primary user's receiving terminal at described sending module, determine that can primary user's receiving terminal the main information of correct decoding, be specially:

time, determine that primary user's receiving terminal can not the main information of correct decoding;

time, determine the main information of primary user's receiving terminal energy correct decoding;

Wherein, R _lfor first kind via node and Equations of The Second Kind via node, N _sfor the noise variance received from user's receiving terminal, P _lfor the transmitted power of described via node.

10. via node according to claim 8, is characterized in that, can described sending module the main information that receives of the main information butt joint of correct decoding and distributing from the transmitted power of information according to primary user's receiving terminal, comprising:

Primary user's receiving terminal can not correct decoding main information time, the power that described via node sends main information is 0, send from the power of information be P _l;

During the main information of primary user's receiving terminal energy correct decoding, the power that described via node sends main information is α _lp _l, send from the power of information be (1-α _l) P _l;

Wherein, n _pfor the noise variance that primary user's receiving terminal receives.