CN103747507B

CN103747507B - The system of selection of communication pattern and choice device, terminal, base station

Info

Publication number: CN103747507B
Application number: CN201410042796.7A
Authority: CN
Inventors: 张晨璐; 其他发明人请求不公开姓名
Original assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Current assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority date: 2014-01-28
Filing date: 2014-01-28
Publication date: 2015-08-12
Anticipated expiration: 2034-01-28
Also published as: WO2015113356A1; CN103747507A

Abstract

The invention provides a kind of system of selection of communication pattern, comprising: judge whether target terminal is positioned at D2D communication range corresponding to present terminal, and/or determine that whether the communications status of described present terminal meets and set up the pre-conditioned of D2D communication; When described target terminal is positioned at D2D communication range corresponding to described present terminal, and/or the communications status of described present terminal meet described pre-conditioned time, described present terminal adopts D2D mode to communicate, otherwise adopts non-D2D mode to communicate.The invention allows for a kind of choice device of communication pattern, terminal and base station.By technical scheme of the present invention, accurately can select optimum communication pattern, thus contribute to saving terminal energy consumption, improving frequency efficiency.

Description

The system of selection of communication pattern and choice device, terminal, base station

Technical field

The present invention relates to wireless communication technology field, in particular to the choice device of a kind of system of selection of communication pattern, a kind of communication pattern, a kind of terminal and a kind of base station.

Background technology

In the related, propose a kind of communication pattern, namely direct communication (the Device to Device between terminal and terminal, i.e. D2D communication), packet can directly be transmitted between the terminals, and without the need to the infrastructure (as base station, core net etc.) of any centre, or by means of only such as base station or other-end etc. as relaying, to realize farther transmission range.

But, for various application scenarios, how to determine whether terminal should select D2D mode to communicate, or adopt traditional non-D2D mode to communicate, become technical problem urgently to be resolved hurrily at present.

Summary of the invention

The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, accurately can select optimum communication pattern, thus contributes to saving terminal energy consumption, improving frequency efficiency.

In view of this, the present invention proposes a kind of system of selection of communication pattern, comprise: judge whether target terminal is positioned at D2D communication range corresponding to present terminal, and/or determine that whether the communications status of described present terminal meets and set up the pre-conditioned of D2D communication; When described target terminal is positioned at D2D communication range corresponding to described present terminal, and/or the communications status of described present terminal meet described pre-conditioned time, described present terminal adopts D2D mode to communicate, otherwise adopts non-D2D mode to communicate.

In this technical scheme, by judging whether target terminal is in D2D communication range corresponding to present terminal, can determine whether present terminal possesses the possibility set up D2D with target terminal and communicate.Particularly, if be in D2D communication range, then can be communicated by D2D mode, otherwise due to distance problem, be merely able to be communicated by non-D2D mode.Non-D2D mode refers to the mobile communications such as 2G, 3G or 4G.

By judging the communications status of present terminal, can determine that present terminal communicates the need of use D2D mode, namely selecting the necessity of D2D mode.Particularly, if the communications status of present terminal is more suitable for application D2D, mode communicates, and contributes to obtaining better communication quality, lower power consumption etc. as by D2D mode.

One comparatively preferred embodiment under, can whether be in D2D communication range corresponding to present terminal to target terminal simultaneously, and whether the communications status of present terminal is applicable to D2D communication and judges, thus guarantee that terminal realizes choose reasonable and optimum communication experiences.Certainly, it will be understood by those skilled in the art that and obviously also can only judge the arbitrary process in above-mentioned two deterministic processes, thus demonstrate the possibility and necessity that present terminal uses D2D mode to carry out communicating respectively.

In technique scheme, preferably, the described D2D communication range judging whether target terminal is positioned at present terminal corresponding specifically comprises: accurately positioning step, for obtaining the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value; Wherein, when described actual range is less than or equal to default distance threshold, and/or when described path fading value is less than or equal to default fading threshold, judge that described target terminal is positioned at D2D communication range corresponding to described present terminal.

In this technical scheme, by obtaining the precise position information of present terminal and target terminal, position relationship between the two can be judged exactly, thus determine that present terminal uses D2D mode to carry out the possibility communicated.Particularly, the D2D communication range that present terminal is corresponding, can directly be represented by distance, when such as target terminal is positioned at present terminal certain distance, determines to be in its D2D communication range; Also distance between present terminal and target terminal can indirectly be indicated by other parameter values, such as comparatively particularly, path fading value can be adopted to represent, thus when path fading value is less, show both close together, otherwise illustrate distant.

Particularly, the precise position information of present terminal and target terminal, can report to network side voluntarily by present terminal and target terminal, also directly can be measured by network side after measuring as GPS, A-GPS etc.

In technique scheme, preferably, before described accurate positioning step, also comprise: pre-determined bit step, for obtaining the adjacent end database corresponding to described present terminal that is that described present terminal is safeguarded or network side maintenance, and/or obtain described present terminal and the area information residing for described target terminal difference; Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, perform described accurate positioning step, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

In this technical scheme, due in pinpoint process, its Measuring Time that data needs are longer accurately, period of reservation of number may be caused long, thus can by comparatively simple pre-determined bit process, in more roughly but efficiently mode, realize the determination to the position relationship between present terminal and target terminal, thus when D2D communication cannot be realized between the two, effectively can reduce the stand-by period of user, again because pre-determined bit process itself is consuming time very short, even if thus still need to perform accurate location, also the waits for too long of user can not be made.

Wherein, present terminal and/or network side can safeguard adjacent end database separately, namely the terminal existed around present terminal, it can be (the mode that present terminal and/or network side can be triggered by periodicity or event that present terminal self and/or network side have obtained, the terminal existed around present terminal is measured, and be updated in the adjacent end database safeguarded separately), thus owing to not needing real-time measurement, make it possible to determine whether target terminal is in D2D communication range corresponding to present terminal at short notice.

Or, can be reported by present terminal and target terminal, or after network side measures, determine the coarse position information of present terminal and target terminal, such as whether both are in same area, to determine whether target terminal is in D2D communication range corresponding to present terminal.Wherein, whether coarse position information for base station IDs, residing community ID and/or the residing tracing area ID etc. be connected, can be in identical community, sector, tracing area etc. both determining.

In technique scheme, preferably, also comprise: when described actual range is less than or equal to the first default distance threshold, and/or described path fading value is when being less than or equal to the first default fading threshold, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; Be greater than the first default distance threshold when described actual range and be less than or equal to default second distance threshold value, and/or described path fading value is when being greater than the first default fading threshold and being less than or equal to the second default fading threshold, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

In this technical scheme, based on pinpoint mode, the D2D mode that specifically can also adopt present terminal and target terminal is determined, when close together such as between present terminal and target terminal and/or communication quality are enough good, directly D2D communication is carried out, i.e. direct D2D mode between present terminal and target terminal; Or also the D2D that can realize between present terminal and target terminal based on relaying communicates, thus when distant and/or communication quality between present terminal and target terminal is good not, farther, more stable D2D communication can be realized by relaying.Wherein, relaying can be realized by base station, mobile base station or other-end etc.

In above-mentioned arbitrary technical scheme, preferably, whether the described communications status determining described present terminal meets pre-conditioned specifically the comprising of setting up D2D communication: accurately decision steps, for measuring the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judge that the communications status of described present terminal meets described pre-conditioned.

In this technical scheme, the necessity for D2D communication judges, can by carrying out Measurement accuracy to realize to the channel conditions between present terminal and target terminal.Particularly, when channel conditions is better, shows the D2D communication that can realize better quality between present terminal and target terminal, and make present terminal realize the power consumption penalty of reduced levels, thus allow present terminal to adopt D2D mode to communicate; And when channel conditions is poor, then may affect quality during D2D communication, and for present terminal, higher power consumption penalty also may be caused, thus should consider to adopt non-D2D mode to communicate.

In technique scheme, preferably, measure described channel quality specifically to comprise: described present terminal sends specific pilot signal or training sequence to described target terminal, and/or described present terminal receives from the described specific pilot signal of described target terminal or training sequence; Wherein, when the signal receiving quality of described specific pilot signal or training sequence is more than or equal to default quality of reception threshold value, and/or the signal receiving strength of described specific pilot signal or training sequence is when being more than or equal to default receiving intensity threshold value, judge that the communications status of described present terminal meets described pre-conditioned.

In this technical scheme, specifically propose by transmitting pilot signal and/or training sequence, thus the corresponding quality of reception and/or intensity are measured, accurately to judge the channel conditions between present terminal and target terminal, thus determine whether present terminal should adopt D2D mode to communicate.

In technique scheme, preferably, before described accurate decision steps, also comprise: pre-decision steps, the second state information of the network side that the first state information and/or described present terminal for obtaining described present terminal are corresponding; Wherein, when described first state information and/or described second state information meet corresponding status condition, perform described accurate decision steps, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

In this technical scheme, due to comparatively accurate to the measurement of channel conditions, and need the transmission and the measurement that perform pilot signal and/or training sequence, thus need to expend the longer time.Therefore, can according to the second state information of the first state information of present terminal and/or its map network side, to realize comparatively roughly but communications status judgement fast, thus when D2D communication cannot be realized between the two, effectively can reduce the stand-by period of user, again because pre-judging process itself is consuming time very short, even if thus still need to perform accurate judgement, the waits for too long of user also can not be made.

In technique scheme, preferably, described first state information comprise following at least one or a combination set of: the real time electrical quantity of described present terminal; The real-time power consumption of described present terminal; Described present terminal is to the support status of D2D communication function; When supporting described D2D communication function, the opening of the D2D communication function of described present terminal; And/or described second state information comprise following at least one or a combination set of: the resource utilization of wireless link; The resource load state of wireless link; The resource utilization of return link; The resource load state of return link; The loading condition of core network data face node (as S-GW, Serving Gateway) and/or signaling plane node (as MME, Mobility Management Entity).

In technique scheme, preferably, also comprise: when described channel conditions is better than the first channel condition preset, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; When described channel conditions is better than the second channel condition preset and is inferior to the first default channel condition, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

In this technical scheme, based on the mode of accurately judgement, the D2D mode that specifically can also adopt present terminal and target terminal is determined, when channel conditions such as between present terminal and target terminal is better, directly D2D communication can be carried out, i.e. direct D2D mode between present terminal and target terminal; Or also the D2D that can realize between present terminal and target terminal based on relaying communicates, thus when channel conditions between present terminal and target terminal is poor, farther, more stable D2D communication can be realized by relaying.Wherein, relaying can be realized by base station, mobile base station or other-end etc.

The invention allows for a kind of choice device of communication pattern, comprise: position judgment unit and/or condition judgment unit, described position judgment unit is for judging whether target terminal is positioned at D2D communication range corresponding to present terminal, and described condition judgment unit sets up the pre-conditioned of D2D communication for determining whether the communications status of described present terminal meets; Selected cell, for being positioned at D2D communication range corresponding to described present terminal when described target terminal, and/or the communications status of described present terminal meet described pre-conditioned time, control described present terminal and select D2D mode to communicate, otherwise select non-D2D mode to communicate.

In technique scheme, preferably, described position judgment unit comprises: accurately locator unit, for obtaining the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value; Wherein, when described actual range is less than or equal to default distance threshold, and/or when described path fading value is less than or equal to default fading threshold, judge that described target terminal is positioned at D2D communication range corresponding to described present terminal.

In technique scheme, preferably, described position judgment unit also comprises: pre-determined bit subelement, for obtaining the adjacent end database corresponding to described present terminal that is that described present terminal is safeguarded or network side maintenance, and/or obtain described present terminal and the area information residing for described target terminal difference; Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, start described accurate locator unit, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

In technique scheme, preferably, described selected cell also for: when described actual range is less than or equal to the first default distance threshold, and/or described path fading value is when being less than or equal to the first default fading threshold, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; Be greater than the first default distance threshold when described actual range and be less than or equal to default second distance threshold value, and/or described path fading value is when being greater than the first default fading threshold and being less than or equal to the second default fading threshold, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

In above-mentioned arbitrary technical scheme, preferably, described condition judgment unit comprises: accurately adjudicate subelement, for measuring the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judge that the communications status of described present terminal meets described pre-conditioned.

In technique scheme, preferably, described accurate judgement subelement is used for: control described present terminal and send specific pilot signal or training sequence to described target terminal, and/or controls described present terminal and receive from the described specific pilot signal of described target terminal or training sequence; Wherein, when the signal receiving quality of described specific pilot signal or training sequence is more than or equal to default quality of reception threshold value, and/or the signal receiving strength of described specific pilot signal or training sequence is when being more than or equal to default receiving intensity threshold value, judge that the communications status of described present terminal meets described pre-conditioned.

In technique scheme, preferably, described condition judgment unit also comprises: adjudicate subelement in advance, the second state information of the network side that the first state information and/or described present terminal for obtaining described present terminal are corresponding; Wherein, when described first state information and/or described second state information meet corresponding status condition, start described accurate judgement subelement, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

In technique scheme, preferably, described first state information comprise following at least one or a combination set of: the real time electrical quantity of described present terminal; The real-time power consumption of described present terminal; Described present terminal is to the support status of D2D communication function; When supporting described D2D communication function, the opening of the D2D communication function of described present terminal; And/or described second state information comprise following at least one or a combination set of: the resource utilization of wireless link; The resource load state of wireless link; The resource utilization of return link; The resource load state of return link; The loading condition of core network data face node (as SGW) and/or signaling plane node (as MME).

In technique scheme, preferably, described selected cell also for: when described channel conditions is better than the first channel condition preset, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; When described channel conditions is better than the second channel condition preset and is inferior to the first default channel condition, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

The invention allows for a kind of terminal, comprising: the choice device of the communication pattern according to any one of technique scheme.

The invention allows for a kind of base station, comprising: the choice device of the communication pattern according to any one of technique scheme.

By above technical scheme, accurately can select optimum communication pattern, thus contribute to saving terminal energy consumption, improving frequency efficiency.

Accompanying drawing explanation

Fig. 1 shows the schematic flow diagram of the system of selection of communication pattern according to an embodiment of the invention;

Fig. 2 is the schematic flow diagram of the terminal location deterministic process in the system of selection of communication pattern embodiment illustrated in fig. 1;

Fig. 3 is the schematic flow diagram of the communications status deterministic process in the system of selection of communication pattern embodiment illustrated in fig. 1;

Fig. 4 shows the schematic flow diagram selected the communication pattern of terminal according to an embodiment of the invention;

Fig. 5 A to Fig. 5 C shows the schematic diagram of switch communication mode according to an embodiment of the invention;

Fig. 6 A to Fig. 6 B shows the schematic diagram of switch communication mode according to another embodiment of the invention;

Fig. 7 A to Fig. 7 B shows the schematic diagram of switch communication mode according to still another embodiment of the invention;

Fig. 8 shows the schematic block diagram of the choice device of communication pattern according to an embodiment of the invention;

Fig. 9 shows the schematic block diagram of terminal according to an embodiment of the invention;

Figure 10 shows the schematic block diagram of base station according to an embodiment of the invention.

Embodiment

In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.

Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.

Fig. 1 shows the schematic flow diagram of the system of selection of communication pattern according to an embodiment of the invention.

As shown in Figure 1, the system of selection of communication pattern according to an embodiment of the invention, comprising:

Step 102, judges whether target terminal is positioned at D2D communication range corresponding to present terminal, and/or determines that whether the communications status of described present terminal meets and set up the pre-conditioned of D2D communication;

Step 104, when described target terminal is positioned at D2D communication range corresponding to described present terminal, and/or the communications status of described present terminal meet described pre-conditioned time, described present terminal adopts D2D mode to communicate, otherwise adopts non-D2D mode to communicate.

In a step 102, the information for terminal judges to comprise two aspects: on the one hand, judge whether target terminal is positioned at D2D communication range corresponding to present terminal; On the other hand, determine whether the communications status of present terminal meets and set up the pre-conditioned of D2D communication.Distinguish composition graphs 2 and Fig. 3 below, above-mentioned two aspects are described in detail.

One, positional information judges

1, steps flow chart

Fig. 2 is the schematic flow diagram of the terminal location deterministic process in the system of selection of communication pattern embodiment illustrated in fig. 1.

As shown in Figure 2, the deterministic process of terminal location can comprise:

Step 202, pre-determined bit step;

Particularly, obtain the adjacent end database corresponding to described present terminal that is that present terminal is safeguarded or network side maintenance, and/or obtain described present terminal and the area information residing for described target terminal difference; Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, perform described accurate positioning step, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

In this technical scheme, present terminal and/or network side can safeguard adjacent end database separately, namely the terminal existed around present terminal, it can be (the mode that present terminal and/or network side can be triggered by periodicity or event that present terminal self and/or network side have obtained, the terminal existed around present terminal is measured, and be updated in the adjacent end database safeguarded separately), thus owing to not needing real-time measurement, make it possible to determine whether target terminal is in D2D communication range corresponding to present terminal at short notice.

Step 204, accurate positioning step.

Particularly, obtain the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value; Wherein, when described actual range is less than or equal to default distance threshold, and/or when described path fading value is less than or equal to default fading threshold, judge that described target terminal is positioned at D2D communication range corresponding to described present terminal.

It should be noted that, due to step 204, namely in accurate positioning step, accurately can judge the position relationship of present terminal and target terminal, thus can adopt step 204, and without the need to performing step 202.

But, due in pinpoint process, its Measuring Time that data needs are longer accurately, period of reservation of number may be caused long, thus can by comparatively simple pre-determined bit process, in more roughly but efficiently mode, realize the determination to the position relationship between present terminal and target terminal, thus when D2D communication cannot be realized between the two, effectively can reduce the stand-by period of user, again because pre-determined bit process itself is consuming time very short, even if thus still need to perform accurate location, the waits for too long of user also can not be made.

2, mode decision

Two, state information judges

1, steps flow chart

Fig. 3 is the schematic flow diagram of the communications status deterministic process in the system of selection of communication pattern embodiment illustrated in fig. 1.

As shown in Figure 3, the deterministic process of terminal communication state can comprise:

Step 302, pre-decision steps.

Particularly, the second state information of the first state information of described present terminal and/or network side corresponding to described present terminal is obtained; Wherein, when described first state information and/or described second state information meet corresponding status condition, perform described accurate decision steps, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

Preferably, described first state information comprise following at least one or a combination set of:

The real time electrical quantity of described present terminal;

The real-time power consumption of described present terminal;

Described present terminal is to the support status of D2D communication function;

When supporting described D2D communication function, the opening of the D2D communication function of described present terminal;

And/or described second state information comprise following at least one or a combination set of:

The resource utilization of wireless link;

The resource load state of wireless link;

The resource utilization of return link;

The resource load state of return link;

The loading condition of core network data face node (as S-GW, Serving Gateway) and/or signaling plane node (as MME, Mobility Management Entity).

Step 304, accurate decision steps.

Particularly, measure the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judge that the communications status of described present terminal meets described pre-conditioned.

It should be noted that: due to comparatively accurate to the measurement of channel conditions, and need the transmission and the measurement that perform pilot signal and/or training sequence, thus need to expend the longer time.Therefore, can according to the second state information of the first state information of present terminal and/or its map network side, to realize comparatively roughly but communications status judgement fast, thus when D2D communication cannot be realized between the two, effectively can reduce the stand-by period of user, again because pre-judging process itself is consuming time very short, even if thus still need to perform accurate judgement, the waits for too long of user also can not be made.

2, mode decision

Comprehensively each process step above-mentioned, Fig. 4 shows the schematic flow diagram selected the communication pattern of terminal according to an embodiment of the invention.

As shown in Figure 4, according to an embodiment of the inventionly comprise three phases to the process that the communication pattern of terminal is selected, just each stage is described in detail respectively below.

First stage: judge in advance

Step 402A, position judges in advance.

Particularly, two kinds of implementations are comprised:

1, judge based on existing positional information

1) present terminal of supposition initiating communication request is UE1, and UE1 needs the target terminal carrying out communicating to be UE2.

UE1 safeguards " adjacent UE database " (specifically can being safeguarded by the upper layer application in UE1), records the end message around UE1 in this database.The mode that UE1 can trigger according to predetermined period or event, upgrade " adjacent UE database ", such as predetermined period can be 30 minutes, and triggering event can be after each sign off.

Particularly, UE1 specifically can detect signaling by send towards periphery, with the reply situation according to around terminal, determines the terminal existed around.

Therefore, when UE1 needs to initiate new communication, " the adjacent UE database " of inquiry self maintained directly can be passed through, and when UE2 is arranged in " adjacent UE database ", determine that UE2 is in D2D communication range corresponding to UE1, namely both can carry out D2D communication.

Certainly, for " adjacent UE database " that UE1 safeguards, also can be uploaded to network side, to be judged the D2D communication range whether UE2 is in UE1 corresponding by network side, and inform UE1.

2) can by " the adjacent UE database " of network side maintenance for UE1.Particularly, after such as being measured by UE1 transmission specific detection signaling, by measurement result informing network side, to realize the maintenance of the end message around to UE1; Or, such as directly can also be obtained all terminal positions connected such as UE1 by network side, to determine the terminal be in around UE1, especially, the terminal be in UE1 in same community or same sector can be obtained, using as the terminal around UE1.

" adjacent UE database " that side Network Based is safeguarded, network side directly can judge the position relationship between UE2 and UE1; Or " adjacent UE database " can be informed UE1 by network side, to be judged the position relationship between itself and UE2 voluntarily by UE1.

In above-mentioned various judgment modes, to obtain in advance and " the adjacent UE database " safeguarded carries out position judgment owing to all have employed, and obtain without the need to carrying out real-time positional information, thus can within a short period of time, obtain the rough position situation between UE1 and UE2, judge to realize position acquisition and D2D ability fast.

2, based on the judgement of real-time position information

Because the content in " adjacent UE database " has certain time ductility, make the judgment accuracy that may affect the position relationship to UE1 and UE2 to a certain extent.Therefore, Real-time Obtaining can be carried out to the positional information of UE1 and UE2.

Certainly, the position for UE1 and UE2 judges to need to complete at short notice in advance, thus only can obtain both coarse position information.Such as can be obtained by the base station IDs etc. of network side to the community ID residing for UE1 and UE2, tracing area ID, connection, thus be in same community or tracing area at both, or when being connected to same base station, think that UE2 is in D2D communication range corresponding to UE1.

Step 402B, communications status judges in advance.

Particularly, from following arbitrary or whole two aspects, communications status can be judged.

1, SOT state of termination

The state of terminal can comprise the state of UE1 and/or the state of UE2, particularly, SOT state of termination can comprise following at least one or a combination set of:

The real time electrical quantity of described present terminal, such as when the real time electrical quantity of UE1 and/or UE2 is less than predetermined threshold value, priority application D2D communication pattern;

The real-time power consumption of described present terminal, such as when the real-time power consumption of UE1 and/or UE2 is less than predetermined threshold value, priority application D2D communication pattern;

Described present terminal to the support status of D2D communication function, such as when UE1 and UE2 support D2D communication function time, priority application D2D communication pattern;

When supporting described D2D communication function, the opening of the D2D communication function of described present terminal, such as when UE1 and UE2 has opened D2D communication function all, priority application D2D communication pattern.

2, network state

Network state, the state of the network side namely connected with UE1, can comprise following at least one or a combination set of:

The resource utilization of wireless link and/or resource load state, such as when the resource utilization of wireless link and/or resource load state are greater than threshold value L1, the direct D2D communication pattern of priority application, and when being less than threshold value L2, priority application relaying D2D communication pattern or conventional communication mode (L2≤L1);

The resource utilization of return link and/or resource load state, such as when the resource utilization of return link and/or resource load state are greater than threshold value K1, priority application D2D communication pattern, and when being less than threshold value K2, priority application conventional communication mode (K2≤K1);

It should be noted that, step 402A and step 402B belongs to pre-two aspects judged, there is not necessary coupled relation or sequencing between the two, that is: step 402A, rear execution step 402B can first be performed, also first can perform step 402B, rear execution step 402A, and in the step performed in the ban, judge that UE1 with UE2 is unsuitable for application D2D mode when communicating, a step after can not performing, and directly judge to use non-D2D mode to communicate.

Step 404, determines to judge whether in advance to pass through, if pass through, then enters the deterministic process again of second stage, otherwise directly enters step 410A.

Wherein, if in the arbitrary step in step 402A or step 402B, judge that UE1 with UE2 is unsuitable for using D2D mode to communicate, then can be judged to not pass through, and only when two steps are all determined to be applicable to use D2D mode to communicate, be just judged to pass through, to shorten the stand-by period of user; Or, also can, when arbitrary step is judged to be suitable for using D2D mode to communicate, just be judged to pass through, to avoid erroneous judgement.

Second stage: judge again

Step 406A, position judges again.

Particularly, accurately can be located by the locating module in the terminals such as UE1, UE2, obtain positional information as by GPS, A-GPS, BEI-DOU position system etc., for the accurate judgement realized the position relationship of UE1 and UE2.

In a kind of concrete execution mode, after the positional information of UE2 can being obtained by UE1, the position relationship both determining voluntarily in distance; Under the execution mode that another kind is concrete, after respectively the positional information of self can being reported to network side by UE1 and UE2, compared by the positional information of network side to both, to determine both position relationships in distance.

Further, based on above-mentioned precise position information, UE1 or network side can also calculate the path fading value between UE1 and UE2, to determine whether both are applicable to be communicated by D2D mode.

Step 406B, communications status judges again.

Specific pilot signal and/or training sequence can be sent to UE2 by UE1, thus by UE2, the quality of reception of signal and/or receiving intensity are measured, and inform UE1 and/or network side, to be judged it by UE1 and/or network side, and determine whether the signal(l)ing condition between UE1 and UE2 is applicable to D2D communication.

Or, also can send above-mentioned specific pilot signal and/or training sequence by UE2 to UE1, thus by UE1, the quality of reception of signal and/or receiving intensity be measured, and judge signal(l)ing condition voluntarily, or report to network side, and judged by network side.

Step 408, determines to judge whether to pass through again, if pass through, then enters the mode selection processes of phase III, otherwise directly enters step 410A.

Wherein, if in the arbitrary step in step 406A or step 406B, judge that UE1 with UE2 is unsuitable for using D2D mode to communicate, then can be judged to not pass through, and only when two steps are all determined to be applicable to use D2D mode to communicate, be just judged to pass through, to shorten the stand-by period of user; Or, also can, when arbitrary step is judged to be suitable for using D2D mode to communicate, just be judged to pass through, to avoid erroneous judgement.

Phase III: model selection

1, conventional communication mode

Step 410A, if be not suitable for D2D communication between UE1 and UE2, then can apply traditional communication pattern between, namely by base station, S-GW/MME etc., realize the data between UE1 and UE2 and/or Signalling exchange.

2, direct D2D communication pattern

Step 410B, the judged result of position-based and/or communications status, the close together such as between UE1 and UE2, and/or channel conditions between UE1 and UE2 is better etc., then directly can carry out D2D communication by between UE1 and UE2, and realize signal forwarding without the need to relaying.

Comparatively particularly, such as position relationship, assuming that distance between UE1 and UE2 and/or path fading value are less than or equal to the first default distance threshold, then determine to use direct D2D communication pattern; And for communications status, assuming that the channel conditions between UE1 and UE2 is better than the first channel conditions preset, then determine to use direct D2D communication pattern.

Wherein, when can all meet above-mentioned condition in either side in " position relationship " and " communications status " or two, determine that UE1 and UE2 uses direct D2D communication pattern.

3, relaying D2D communication pattern

Step 410C, the judged result of position-based and/or communications status, distant such as between UE1 and UE2, although or close together but channel conditions is not ideal, then can by base station, mobile base station or other-end as relaying, the D2D based on relaying realized between UE1 and UE2 communicates, with by relay extension communication distance, optimize channel conditions.

Comparatively particularly, such as position relationship, assuming that distance between UE1 and UE2 and/or path fading value are greater than the first default distance threshold and are less than or equal to default second distance threshold value (the first distance threshold is less than second distance threshold value), then determine to use relaying D2D communication pattern; And for communications status, assuming that the channel conditions between UE1 and UE2 is worse than the first default channel conditions but is better than the second channel situation (the first channel conditions is better than second channel situation) preset, then determine to use relaying D2D communication pattern.

Wherein, when can all meet above-mentioned condition in either side in " position relationship " and " communications status " or two, determine that UE1 and UE2 uses relaying D2D communication pattern.

The present invention proposes a kind of technical scheme that the communication pattern of terminal is selected, wherein by after judging the positional information between present terminal and target terminal, communications status etc., determine the concrete communication pattern used.It should be noted that, technique scheme can either be applicable to the initial process of establishing communicated, also can be applicable to communicate the mode handover procedure after setting up, trigger when namely flow process as shown in Figures 2 to 4 can be initiated by new business, thus select suitable data path for new business; Also can trigger by existing business generating process, ensure that the seamless harmless pattern of existing business switches.

For setting up the mode handover procedure after communication, needing the condition monitoring that communicating pair is continued, below by multiple embodiment, being described in detail based on multiple embody rule scene of the present invention and illustrating.

Embodiment one

Fig. 5 A to Fig. 5 C shows the schematic diagram of switch communication mode according to an embodiment of the invention.

As shown in Figure 5A, based on the position judgment to UE1 and UE2, assuming that distance is between the two less than threshold value A.

And/or, based on the condition adjudgement to UE1 and UE2, assuming that UE1 receives be greater than thresholding B from the measurement pilot frequency/search for pilots receiving intensity of UE2 or signal quality, and base station wireless resource load and/or utilization rate are greater than thresholding L, and/or eNB to S-GW(is not shown) load and/or resource utilization be greater than thresholding K.

Therefore, based on above-mentioned judgement, direct D2D communication pattern can be adopted between UE1 and UE2.

As shown in Figure 5 B, pass through test constantly, assuming that detect that the distance value between UE1 and UE2 is greater than threshold value C(C >=A), be less than threshold value D(D >=C), and both are in identical community, then the communication pattern of UE1 and UE2 can be switched to relaying D2D communication pattern, be namely the D2D communication pattern of relaying with eNB.

As shown in Figure 5 C, by test constantly, assuming that detect that the distance value between UE1 and UE2 is greater than threshold value E(E >=D), and both are in different communities; And/or detect that the load value of return link is lower than threshold value K, then the communication pattern of UE1 and UE2 can be switched to conventional communication mode.

Embodiment two

Fig. 6 A to Fig. 6 B shows the schematic diagram of switch communication mode according to another embodiment of the invention.

As shown in Figure 6A, assuming that UE1 and UE2 is all in the coverage of base station eNB, and establish correspondence by traditional mode between UE1 and UE2, namely UE1 and UE2 realizes the mutual of data and/or signaling by eNB, S-GW/MME.

As shown in Figure 6B, carry out continuing to detect to UE1 and UE2, assuming that detect that the distance between two UE is less than threshold value A, and/or UE1 receives and is greater than threshold value B (or UE2 receives the pilot signal from UE1) from the receiving intensity of the measurement pilot frequency/search for pilots of UE2 or signal quality, then the communication pattern of UE1 and UE2 can be switched to direct D2D communication pattern.

Meanwhile, based on above-mentioned direct D2D communication pattern, even if UE1 and UE2 leaves the coverage of eNB, smooth communication between the two can still be ensured.In addition, by as the prompting such as interface, sound, can inform that the user that UE1 and UE2 is corresponding remains in certain scope, to ensure carrying out smoothly of communication process.

Embodiment three

Fig. 7 A to Fig. 7 B shows the schematic diagram of switch communication mode according to still another embodiment of the invention.

As shown in Figure 7 A, assuming that UE1 and UE2 is in the coverage of base station eNB 1 and eNB2 respectively, and establish correspondence by traditional mode between UE1 and UE2, namely UE1 and UE2 realizes the mutual of data and/or signaling by eNB1, S-GW/MME, eNB2.

Carry out continuing to detect to UE1 and UE2, assuming that detect that the distance between two UE is less than threshold value A, and/or UE1 receives and is greater than threshold value B (or UE2 receives the pilot signal from UE1) from the receiving intensity of the measurement pilot frequency/search for pilots of UE2 or signal quality, and/or detect that the Radio Resource load of eNB1 or eNB2 or resource utilization are greater than threshold value L1, then the communication pattern of UE1 and UE2 can be switched to direct D2D communication pattern.

As shown in Figure 7 B, assuming that UE1 and UE2 is in the coverage of base station eNB 1 and eNB2 respectively, and correspondence is established by traditional mode between UE1 and UE2.

Carry out continuing to detect to UE1 and UE2, assuming that detect that although two UE are in different communities, but distance is between the two greater than threshold value C(C >=A), be less than threshold value D(D >=C), and/or detect that the Radio Resource load of eNB1 or eNB2 or resource utilization are less than threshold value L2, then the communication pattern of UE1 and UE2 can be switched to the D2D communication pattern of relaying, namely with eNB1 and eNB2 for relaying, carry out the transmission of data and/or signaling by eNB1 and eNB2 by such as X2 interface.

Fig. 8 shows the schematic block diagram of the choice device of communication pattern according to an embodiment of the invention.

As shown in Figure 8, the choice device 800 of communication pattern according to an embodiment of the invention, comprise: position judgment unit 802 and/or condition judgment unit 804, described position judgment unit 802 is for judging whether target terminal is positioned at D2D communication range corresponding to present terminal, and described condition judgment unit 804 sets up the pre-conditioned of D2D communication for determining whether the communications status of described present terminal meets; Selected cell 806, for being positioned at D2D communication range corresponding to described present terminal when described target terminal, and/or the communications status of described present terminal meet described pre-conditioned time, control described present terminal and select D2D mode to communicate, otherwise select non-D2D mode to communicate.

In technique scheme, preferably, described position judgment unit 802 comprises: accurately locator unit 8022, for obtaining the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value; Wherein, when described actual range is less than or equal to default distance threshold, and/or when described path fading value is less than or equal to default fading threshold, judge that described target terminal is positioned at D2D communication range corresponding to described present terminal.

In technique scheme, preferably, described position judgment unit 802 also comprises: pre-determined bit subelement 8024, for obtaining the adjacent end database corresponding to described present terminal that is that described present terminal is safeguarded or network side maintenance, and/or obtain described present terminal and the area information residing for described target terminal difference; Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, start described accurate locator unit 8022, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

In technique scheme, preferably, described selected cell 806 also for: when described actual range is less than or equal to the first default distance threshold, and/or described path fading value is when being less than or equal to the first default fading threshold, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; Be greater than the first default distance threshold when described actual range and be less than or equal to default second distance threshold value, and/or described path fading value is when being greater than the first default fading threshold and being less than or equal to the second default fading threshold, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

In above-mentioned arbitrary technical scheme, preferably, described condition judgment unit 804 comprises: accurately judgement subelement 8042, for measuring the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judge that the communications status of described present terminal meets described pre-conditioned.

In technique scheme, preferably, described accurate judgement subelement 8042 for: control described present terminal and send specific pilot signal or training sequence to described target terminal, and/or control described present terminal and receive from the described specific pilot signal of described target terminal or training sequence; Wherein, when the signal receiving quality of described specific pilot signal or training sequence is more than or equal to default quality of reception threshold value, and/or the signal receiving strength of described specific pilot signal or training sequence is when being more than or equal to default receiving intensity threshold value, judge that the communications status of described present terminal meets described pre-conditioned.

In technique scheme, preferably, described condition judgment unit 804 also comprises: pre-judgement subelement 8044, the second state information of the network side that the first state information and/or described present terminal for obtaining described present terminal are corresponding; Wherein, when described first state information and/or described second state information meet corresponding status condition, start described accurate judgement subelement 8042, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

In technique scheme, preferably, described selected cell 806 also for: when described channel conditions is better than the first channel condition preset, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate; When described channel conditions is better than the second channel condition preset and is inferior to the first default channel condition, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

Fig. 9 shows the schematic block diagram of terminal according to an embodiment of the invention.

As shown in Figure 9, terminal 900 according to an embodiment of the invention, comprising: the choice device 800 of communication pattern as shown in Figure 8.Particularly, when terminal 900 needs the communication pattern determining to adopt (such as employing D2D mode or non-D2D mode, and directly D2D mode or judge based on the D2D mode etc. of relaying), can be realized by terminal 900 self, namely by choice device 800 and the concrete functional module thereof of communication pattern as shown in Figure 8, thus accurately judge that terminal 900 is most suitable for the communication mode applied.

As shown in Figure 10, base station 1000 according to an embodiment of the invention, comprising: the choice device 800 of communication pattern as shown in Figure 8.Particularly, when the terminal that certain is connected to base station 1000 needs the communication pattern determining to adopt (such as employing D2D mode or non-D2D mode, and directly D2D mode or judge based on the D2D mode etc. of relaying), the choice device 800 of communication pattern as shown in Figure 8 and concrete functional module thereof can be passed through by base station 1000, thus accurately judge that this terminal is most suitable for the communication mode applied.

More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of system of selection of communication pattern, a kind of choice device of communication pattern, a kind of terminal and a kind of base station, accurately can select optimum communication pattern, thus contribute to saving terminal energy consumption, improving frequency efficiency.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a system of selection for communication pattern, is characterized in that, comprising:

Judge whether target terminal is positioned at D2D communication range corresponding to present terminal, and/or determine that whether the communications status of described present terminal meets and set up the pre-conditioned of D2D communication;

When described target terminal is positioned at D2D communication range corresponding to described present terminal, and/or the communications status of described present terminal meet described pre-conditioned time, described present terminal adopts D2D mode to communicate, otherwise adopts non-D2D mode to communicate;

The described D2D communication range judging whether target terminal is positioned at present terminal corresponding specifically comprises:

Accurate positioning step, for obtaining the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value;

Wherein, when described actual range is less than or equal to default distance threshold, and/or when described path fading value is less than or equal to default fading threshold, judge that described target terminal is positioned at D2D communication range corresponding to described present terminal;

Before described accurate positioning step, also comprise:

Pre-determined bit step, for obtaining the adjacent end database corresponding to described present terminal that is that described present terminal is safeguarded or network side maintenance, and/or obtains described present terminal and the area information residing for described target terminal difference;

Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, perform described accurate positioning step, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

2. the system of selection of communication pattern according to claim 1, is characterized in that, also comprises:

When described actual range is less than or equal to the first default distance threshold, and/or when described path fading value is less than or equal to the first default fading threshold, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate;

Be greater than the first default distance threshold when described actual range and be less than or equal to default second distance threshold value, and/or described path fading value is when being greater than the first default fading threshold and being less than or equal to the second default fading threshold, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

3. the system of selection of communication pattern according to claim 1 and 2, is characterized in that, whether the described communications status determining described present terminal meets pre-conditioned specifically the comprising of setting up D2D communication:

Accurate decision steps, for measuring the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judges that the communications status of described present terminal meets described pre-conditioned.

4. the system of selection of communication pattern according to claim 3, is characterized in that, measures described channel quality and specifically comprises:

Described present terminal sends specific pilot signal or training sequence to described target terminal, and/or described present terminal receives from the described specific pilot signal of described target terminal or training sequence;

Wherein, when the signal receiving quality of described specific pilot signal or training sequence is more than or equal to default quality of reception threshold value, and/or the signal receiving strength of described specific pilot signal or training sequence is when being more than or equal to default receiving intensity threshold value, judge that the communications status of described present terminal meets described pre-conditioned.

5. the system of selection of communication pattern according to claim 3, is characterized in that, before described accurate decision steps, also comprises:

Pre-decision steps, the second state information of the network side that the first state information and/or described present terminal for obtaining described present terminal are corresponding;

Wherein, when described first state information and/or described second state information meet corresponding status condition, perform described accurate decision steps, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

6. the system of selection of communication pattern according to claim 5, is characterized in that,

Described first state information comprise following at least one or a combination set of:

The real time electrical quantity of described present terminal;

The real-time power consumption of described present terminal;

The resource utilization of wireless link;

The resource load state of wireless link;

The resource utilization of return link;

The resource load state of return link;

The loading condition of core network data face node and/or signaling plane node.

7. the system of selection of communication pattern according to claim 3, is characterized in that, also comprises:

When described channel conditions is better than the first channel condition preset, determine between described present terminal and described target terminal, to adopt direct D2D mode to communicate;

When described channel conditions is better than the second channel condition preset and is inferior to the first default channel condition, determine between described present terminal and described target terminal, to adopt the D2D mode based on relaying to communicate.

8. a choice device for communication pattern, is characterized in that, comprising:

Position judgment unit and/or condition judgment unit, described position judgment unit is for judging whether target terminal is positioned at D2D communication range corresponding to present terminal, and described condition judgment unit sets up the pre-conditioned of D2D communication for determining whether the communications status of described present terminal meets;

Selected cell, for being positioned at D2D communication range corresponding to described present terminal when described target terminal, and/or the communications status of described present terminal meet described pre-conditioned time, control described present terminal and select D2D mode to communicate, otherwise select non-D2D mode to communicate;

Described position judgment unit comprises:

Accurate locator unit, for obtaining the precise position information of described present terminal and described target terminal, and the actual range calculated between described present terminal and described target terminal and/or path fading value;

Described position judgment unit also comprises:

Pre-determined bit subelement, for obtaining the adjacent end database corresponding to described present terminal that is that described present terminal is safeguarded or network side maintenance, and/or obtains described present terminal and the area information residing for described target terminal difference;

Wherein, when finding described target terminal in described adjacent end database, and/or described present terminal and described target terminal are when being in same area, start described accurate locator unit, otherwise judge that described target terminal is not in D2D communication range corresponding to described present terminal.

9. the choice device of communication pattern according to claim 8, is characterized in that, described selected cell also for:

10. the choice device of the communication pattern according to any one of according to Claim 8 to 9, is characterized in that, described condition judgment unit comprises:

Accurate judgement subelement, for measuring the channel conditions between described present terminal and described target terminal, when described channel conditions meets preset channel condition, judges that the communications status of described present terminal meets described pre-conditioned.

The choice device of 11. communication patterns according to claim 10, is characterized in that, described accurate judgement subelement is used for:

Control described present terminal and send specific pilot signal or training sequence to described target terminal, and/or control described present terminal and receive from the described specific pilot signal of described target terminal or training sequence;

The choice device of 12. communication patterns according to claim 10, is characterized in that, described condition judgment unit also comprises:

Pre-judgement subelement, the second state information of the network side that the first state information and/or described present terminal for obtaining described present terminal are corresponding;

Wherein, when described first state information and/or described second state information meet corresponding status condition, start described accurate judgement subelement, otherwise it is described pre-conditioned to judge that the communications status of described present terminal does not meet.

The choice device of 13. communication patterns according to claim 12, is characterized in that,

The real time electrical quantity of described present terminal;

The real-time power consumption of described present terminal;

The resource utilization of wireless link;

The resource load state of wireless link;

The resource utilization of return link;

The resource load state of return link;

The choice device of 14. communication patterns according to claim 10, is characterized in that, described selected cell also for:

15. 1 kinds of terminals, is characterized in that, comprising: the choice device of the communication pattern according to any one of claim 8 to 14.

16. 1 kinds of base stations, is characterized in that, comprising: the choice device of the communication pattern according to any one of claim 8 to 14.