CN102761834B - System and method for grouping vehicles - Google Patents
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Abstract
The invention provides a system and method for grouping vehicles. The system comprises at least one SINK node and a vehicle-mounted terminal; the SINK node is used for transmitting a broadcast message, wherein the broadcast message comprises a group identifier of a group corresponding to the SINK node; the vehicle-mounted terminal is used for receiving the broadcast message, carrying out judgment according to a group mark stored by the vehicle-mounted terminal, judging the signal intensity of the broadcast message if the condition that the vehicle-mounted terminal is ungrouped is judged, storing the group identifier in the broadcast message when the signal intensity of the broadcast message is higher than the preset first signal intensity threshold, and setting the group mark to be grouped; and the vehicle-mounted terminal is further used for communicating with the SINK node corresponding to the stored group identifier. According to the technical scheme adopted by the invention, the technical problem that the vehicle-mounted terminal is in a mobile state and needs to acquire regional information is solved.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly relates to a kind of vehicle grouping system and method.
Background technology
Along with the fast development of the communication technology and mobile Internet, automobile possesses communication function, sends or obtaining information for convenient.Auto communication of the prior art is generally by configuration communication module (2G or 3G) and embedded SIM card on car-mounted terminal, is similar to current mobile phone terminal to realize.By car-mounted terminal and base station communication in prior art, base station re-sends to car-mounted terminal after carrying out searching the corresponding information of acquisition according to the request of car-mounted terminal.But car-mounted terminal is in mobile status usually, need to obtain regional information, as the food and drink near current road conditions, car-mounted terminal present position, oiling information etc. simultaneously.As can be seen here, based on region, car-mounted terminal is carried out to the packet communication of mobile form, car-mounted terminal can be made to be convenient to obtain the information in residing region, and the packet communication how carrying out mobile form based on region to car-mounted terminal is the problem needing at present to solve.
Summary of the invention
The object of the invention is to provide a kind of vehicle grouping system and method, is in mobile status for solving car-mounted terminal, needs the technical problem obtaining regional information.
The invention provides a kind of vehicle grouping system, comprising: at least one SINK node and car-mounted terminal;
Described SINK node, for sending broadcast, described broadcast comprises the group mark of described SINK node correspondence grouping;
Described car-mounted terminal, for receiving described broadcast, judge according to the packet marking that described car-mounted terminal stores, if judge that described car-mounted terminal does not divide into groups, then judge the signal strength signal intensity of described broadcast, when the signal strength signal intensity of described broadcast is greater than default first signal strength threshold, stores the group mark in described broadcast, and described packet marking is set to divides into groups;
Described car-mounted terminal also communicates for identifying corresponding SINK node with stored group.
Present invention also offers a kind of vehicle group technology, comprising:
SINK node sends broadcast, and described broadcast comprises the group mark of described SINK node correspondence grouping;
Car-mounted terminal receives described broadcast, judge according to the packet marking that described car-mounted terminal stores, if judge that described car-mounted terminal does not divide into groups, judge the signal strength signal intensity of described broadcast, when the signal strength signal intensity of described broadcast is greater than default first signal strength threshold, store the group mark in described broadcast, and described packet marking is set to divides into groups;
Described car-mounted terminal and the group that described car-mounted terminal stores identify corresponding SINK node and communicate.
The invention provides a kind of vehicle grouping system and method, this technical scheme receives the broadcast of SINK node transmission by car-mounted terminal, described broadcast comprises the group mark of described SINK node correspondence grouping, car-mounted terminal completes grouping after judging according to the signal strength signal intensity of current grouping situation and broadcast message, thus realizes the SINK enabling communication between nodes that car-mounted terminal and its place divides into groups.Technical solution of the present invention solves car-mounted terminal and is in mobile status, needs the technical problem obtaining regional information.
Accompanying drawing explanation
The working state schematic representation of a kind of vehicle grouping system that Fig. 1 provides for one embodiment of the invention;
The schematic flow sheet of a kind of vehicle group technology that Fig. 2 provides for further embodiment of this invention.
Embodiment
The working state schematic representation of a kind of vehicle grouping system that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, a kind of vehicle grouping system provided by the invention, comprise: at least one SINK node 1 and car-mounted terminal 2, as shown in fig. 1, SINK node 1 is according to area distribution, corresponding car-mounted terminal automatically accesses the grouping of the SINK node at place, region residing for it in vehicle travel process, grouping as shown in dotted line oval in figure, and by carrying out the mutual of information with the place SINK node that divides into groups, as the chain-dotted line line between the SINK node 1 in Fig. 1 and car-mounted terminal 2 is illustrated.
Concrete group technology is SINK node 1, and for sending broadcast, broadcast comprises the group mark of SINK node correspondence grouping.SINK node 1 is in the management of loose formula for grouping, by sending broadcast, and the group mark by adding grouping in broadcast, as SINK1 etc., when car-mounted terminal 2 is in the scope that this SINK node broadcasts message covers, car-mounted terminal 2 is just divided into the grouping of this SINK node automatically.
Car-mounted terminal 2, receive broadcast, judge according to the packet marking that car-mounted terminal stores, if judge that car-mounted terminal does not divide into groups, then judge the signal strength signal intensity of broadcast, when the signal strength signal intensity of broadcast is greater than default first signal strength threshold, group in stored broadcast message mark, and packet marking is set to divides into groups.
DSRC is selected in communication in the present embodiment between SINK node 1 and car-mounted terminal 2, when carrying out position to SINK node and disposing, consider the effective communication distance 1000m of DSRC, have a lot of social connections 20m, and in conjunction with the efficient communication time between car-mounted terminal and SINK node, for the frequent switching preventing the grouping between adjacent S INK node from disturbing and communicating with car-mounted terminal, the interval of maximum communication distance is preferably adopted to dispose SINK node.That is, there is following situation, when vehicle drives to the intermediate zone of adjacent S INK node, two broadcast singals that car-mounted terminal receives are all weak situation, now, during car-mounted terminal any one SINK be not included into wherein divides into groups.In addition owing to adopting the layout of above-mentioned SINK node, car-mounted terminal detects that the probability both for msp signal is very little simultaneously, even if there occurs this kind of situation, adopts car-mounted terminal not to be included into the processing mode of any one SINK grouping wherein.Concrete reason is that vehicle is in high-speed motion, and car-mounted terminal can receive again the broadcast singal that SINK node sends at short notice, if now also receive two broadcast singals, and can complete strong and weak differentiation, then complete grouping.
Car-mounted terminal 2 is for the broadcast received, first judge whether oneself has divided into groups according to packet marking, concrete packet marking can be such as a two-value number, when for 0 time represent and not yet divide into groups, when for 1 time represent and divide into groups, this packet marking can be also the mark of other types numerical value as certain sense, does not repeat them here.
When car-mounted terminal 2 according to packet marking judged result for not yet to divide into groups, because the grouping system of the embodiment of the present invention is based on region, so, also need the signal strength signal intensity judging this broadcast.Reason is mainly, the intensity of signal becomes certain proportional relation with distance under normal circumstances, distance nearer, then signal strength signal intensity is stronger, thus by judge the signal strength signal intensity of broadcast message judge car-mounted terminal 2 apart from this transmission broadcast message SINK node 1 between how far.
Concrete, such as the signal strength signal intensity of broadcast message can be divided into multiple grade, for in strong weak three grades in the present embodiment, when the signal strength signal intensity of broadcast message is strong time, can determine between the SINK node 1 of this car-mounted terminal 2 apart from transmission broadcast message very near, can be understood as in the grouping of the SINK node 1 being in transmission broadcast message.When during the signal strength signal intensity of broadcast message is time, can determine that the spacing of this car-mounted terminal 2 apart from the SINK node 1 of transmission broadcast message is in the scope that signal can transmit fast, in addition because this car-mounted terminal 2 is not yet in any grouping, so can be added the grouping of this SINK node 1.When the signal strength signal intensity of broadcast message is weak time, can determine that this car-mounted terminal 2 is very far away apart from the spacing of the SINK node 1 sending broadcast message, even if divide into groups this moment, consider that this car-mounted terminal 2 is in mobile status, there is car-mounted terminal 2 and cannot carry out the possible of efficient communication with SINK node, so, for the signal strength signal intensity of weak broadcast message, do not divide into groups.
According to the signal strength signal intensity hierarchy plan of above-mentioned broadcast message, the first signal strength threshold in the present embodiment is the minimum of the signal strength signal intensity of the broadcast message of middle rank, that is, when the signal strength signal intensity of the broadcast message that car-mounted terminal 2 receives is in height or middle rank, can group mark in stored broadcast message, and packet marking is set to divides into groups, such as packet marking is set to 1.
Car-mounted terminal 2 also communicates for identifying corresponding SINK node 1 with stored group.Such car-mounted terminal 2 just can communicate with SINK node 1 nearby, and car-mounted terminal 2 obtains required information from SINK node 1, or sends information requirement to SINK node 1.
Communication between concrete car-mounted terminal 2 and SINK node 1 adopts Dedicated Short Range Communications, technology (Dedicated Short Range Communications, DSRC).The supported mobility of DSRC is less than 180km/h, and communication distance is less than the operational environment of 1000m, and its traffic rate is generally 3 ~ 27Mbps.
In the present embodiment, SINK node is preferably arranged in roadside, and when current vehicle travels on urban road, usual 6 tracks are had a lot of social connections for about 20m, then can ignore have a lot of social connections relative to communication distance.Approximate think that the overlayable efficient communication scope with car-mounted terminal of SINK node is in 2000 meters, suppose that vehicle Mean Speed is 50km/h, then efficient communication time range is 2/50 hour namely 2.4 minutes, owing to adopting the method for fast grouping, traffic rate in conjunction with DSRC is 3 ~ 27Mbps, as long as design suitable SINK broadcast cycle, vehicle is consuming time very short to the process completing grouping from entering effective communication range, therefore, apply DSRC can realize SINK node and car-mounted terminal in the present embodiment and carry out simple data communication.
Technical scheme in the present embodiment receives the broadcast of SINK node transmission by car-mounted terminal, described broadcast comprises the group mark of described SINK node correspondence grouping, car-mounted terminal completes grouping after judging according to the signal strength signal intensity of current grouping situation and broadcast message, thus realizes the SINK enabling communication between nodes that car-mounted terminal and its place divides into groups.Technical solution of the present invention solves car-mounted terminal and is in mobile status, needs the technical problem obtaining regional information.
Preferred as technique scheme, car-mounted terminal 2 is also for when judging that car-mounted terminal 2 divides into groups, judge whether the group mark in broadcast is identical with the group mark stored in car-mounted terminal 2, if different, then judge the signal strength signal intensity of broadcast, when the signal strength signal intensity of broadcast is greater than default secondary signal strength threshold, the group stored mark is replaced with the group mark in broadcast in car-mounted terminal 2.
Because car-mounted terminal 2 is in mobile status, its grouping situation is dynamic, and car-mounted terminal 2 needs to divide into groups according to region, namely accesses the SINK node 1 of close together.So, receive broadcast message at car-mounted terminal 2 and judge that according to packet marking this car-mounted terminal 2 is as after dividing into groups, by judging that the signal strength signal intensity of broadcast judges that car-mounted terminal 2 is apart from the distance between SINK node 1.Identical with above-mentioned determination methods, but possess grouping due to car-mounted terminal 2 this moment, to only have when the signal strength signal intensity of the broadcast message that receive is in strong time just consideration to be joined the grouping at this SINK node 1 place, otherwise keep former grouping.That is, the grouping at this SINK node 1 place is just added time the distance between SINK node 1 and this car-mounted terminal 2 is enough near.Secondary signal strength threshold in the present embodiment is the minimum of the signal strength signal intensity of the broadcast message of intensity level.The grouping of car-mounted terminal 2 based on region can be realized by this method.
As shown in fig. 1, preferred as technique scheme, also comprises: base station 3, is connected with SINK node 1, for communicating with SINK node 1.SINK node 1 communicates with base station 3, may be used for sending information to base station 3, and such as send the vehicle condition information etc. that car-mounted terminal 2 is sent to SINK node 1, SINK node 1 is forwarded to base station 3.
Preferred as technique scheme, due to the demand of grouping, car-mounted terminal 2 needs configuration two channels, broadcast reception channel and interactive channel.The broadcast that car-mounted terminal 2 is sent specifically for being received SINK node by broadcast reception channel; Car-mounted terminal 2 is identified corresponding SINK node specifically for the group stored by interactive channel and car-mounted terminal and communicates; Wherein, broadcast reception channel is different from the frequency of interactive channel.Information non-interference between such two channels, respectively realize grouping and and SINK node 1 between information interaction.
Preferred as technique scheme, car-mounted terminal 2 more specifically sends information acquisition request for the SINK node of the group mark correspondence stored to car-mounted terminal by interactive channel, and the object information that the SINK node receiving the group mark correspondence that car-mounted terminal 2 stores returns according to the address information of car-mounted terminal 2; Information acquisition request comprises the address information of car-mounted terminal.
Preferred as technique scheme, the address information of car-mounted terminal 2 comprises vehicles identifications.In the present embodiment, the address information of car-mounted terminal 2 can be the IMSI information in SIM card in car-mounted terminal 2.And at present due to IMSI information resource-constrained, vehicles identifications for car-mounted terminal 2 can use the number-plate number of such as vehicle, the unique identification of the vehicles such as engine number, can save a large amount of IMSI information resources like this, and the address information of car-mounted terminal 2 also has uniqueness simultaneously.
Communication between preferred car-mounted terminal 2 and SINK node 1 and base station 3 is for following execution mode, concrete:
The first information of car-mounted terminal 2 transmission that SINK node 1 receives in the grouping of SINK node 1 correspondence obtains request, and the address information according to the car-mounted terminal in the grouping of SINK node correspondence sends the first information corresponding to first information mark to the car-mounted terminal in the corresponding grouping of SINK node; The first information obtains address information and the first information mark that request comprises the car-mounted terminal in the grouping of SINK node correspondence.This first information mark is specifically as follows the mark mutually approved through car-mounted terminal 2 and SINK node 1, can use the corresponding information requirement of the coding stands of numeral, letter, numeral or monogram or particular form.The first information that the first information that such as car-mounted terminal 2 sends obtains in request is designated " abc ", and the information type needed for this first information mark " abc " represents is current traffic information.After then the SINK node 1 of this car-mounted terminal 2 place grouping receives the first acquisition request, judge that the first information is designated " abc ", determine that this information needed for car-mounted terminal 2 is current traffic information, so the first information is sent to this car-mounted terminal according to the address information of car-mounted terminal 2.
Car-mounted terminal 2 sends the first information to the SINK node that the grouping of car-mounted terminal place is corresponding and obtains request, receives the first information that SINK node corresponding to car-mounted terminal place grouping returns.Car-mounted terminal 2, by realizing the quick obtaining of car-mounted terminal 2 regional information alternately with SINK node, avoids the very big load brought to base station 3.By to car-mounted terminal according to group areas, the SINK node divided into groups in car-mounted terminal and its place communicates, area information is provided for it by SINK node, when solving the large density distribution of automobile in prior art, auto communication will bring very big load to base station, can cause accessing congested problem time serious.
In addition, SINK node, by being connected with base station 3, can obtain information needed for more car-mounted terminal by base station 3.Such as when not storing in a certain information SINK node needed for car-mounted terminal 2, then need SINK node that the information requirement of this car-mounted terminal 2 is forwarded to base station 3, base station 3 is also connected to core net by network, attached not shown, base station obtains corresponding information by core net, send to car-mounted terminal 2 by SINK node 1 again, thus realize the timely acquisition of car-mounted terminal 2 to its information needed.
SINK node 1 also receives by preset frequency and stores the area information of base station 3 transmission; Area information is the information of car-mounted terminal 2 correspondence in SINK node 1 region.Demand information content due to car-mounted terminal 2 generally includes several large class, such as temporal information, road conditions, food and drink, weather, fuel station information etc.So SINK node 1 can such as to obtain the temporal information, traffic information, catering information, Weather information, fuel station information etc. of its region every 3 minutes, for the demand of the car-mounted terminal 2 in the grouping of this SINK node 1 correspondence.Concrete predeterminated frequency can be determined according to such as time point, and the receive frequency of the peak period SINK node of such as going to work is 1 minute, and midnight equal time section SINK node receive frequency be 15 minutes.The concrete reception information content also can obtain according to actual conditions or by statistical testing of business cycles, and namely by inquiry etc. mode obtains the situation of the information content that car-mounted terminal 2 needs most.SINK node 1 is owing to having certain Regional Distribution in addition, so SINK node 1 only needs the area information being obtained its region by base station.
The first information mark that SINK node 1 specifically obtains in request according to the first information judges, if have and identify the corresponding first information with the first information in the area information that stores of SINK node, the first information is sent to that SINK node is corresponding by the address information obtaining the car-mounted terminal in request in the grouping of SINK node correspondence according to the first information divide into groups in car-mounted terminal.Such as current vehicle mounted terminal 2 sends the first information and obtains request, it comprises first information mark " xyz " and address information " HB073 " thereof, the information that the needs that the concrete first information identifies correspondence obtain is the weather condition in 24 hours futures of current region, the destination address sent is the SINK address of node of the grouping at this car-mounted terminal 2 place, and the concrete group obtained when divide into groups according to it identifies to be determined.After SINK node 1 receives this first information acquisition request, judge that first information mark " xyz " is as the weather condition in following 24 hours, and stored the corresponding information content in the area information of SINK node 1 through searching its storage, then this information content is sent to this car-mounted terminal 2 as the first information by SINK node 1, and the destination address of transmission is the address information " HB073 " of car-mounted terminal.
Carried out the renewal storage of area information like this by SINK node, car-mounted terminal access to base station when obtaining information can be saved, effectively reduce offered load, improve communication efficiency.
When SINK node 1 does not also identify the corresponding first information with the first information in the area information that SINK node 1 stores, the second information acquisition request is sent to base station 3, receive the first information that base station 3 issues according to the second information acquisition request, the first information is sent to car-mounted terminal by the address information according to the car-mounted terminal in the grouping of SINK node correspondence; Second information acquisition request comprises the address information of the car-mounted terminal 2 in first information mark and the grouping of SINK node correspondence.
Such as current vehicle mounted terminal 2 sends the first information and obtains request, it comprises first information mark " uvw " and address information " HB073 " thereof, the information of the needs acquisition that concrete first information mark is corresponding is the market shopping information of discount of current region, the destination address sent is the SINK address of node of the grouping at this car-mounted terminal 2 place, and the concrete group obtained when divide into groups according to it identifies to be determined.After SINK node 1 receives this first information acquisition request, judge that first information mark " uvw " is as market shopping information of discount, and do not store the corresponding information content in the area information of SINK node 1 through searching its storage, then this first information is obtained the address information " HB073 " of first information mark " uvw " in request and the car-mounted terminal in the grouping of SINK node correspondence by SINK node 1, sends to the base station 3 communicated with this SINK node 1 as the second information acquisition request.Base station 3, again by the communication with core net, obtains and identifies information content corresponding to " uvw " with the first information, and the address information " HB073 " of the car-mounted terminal of this information content and correspondence is handed down to SINK node 1.Communication between base station 3 and core net is prior art, and particular content repeats no more herein.SINK node 1 receives the first information that base station 3 issues according to the second information acquisition request, and this first information is sent to car-mounted terminal 2 according to the address information of car-mounted terminal 2 by SINK node 1 again.
The concrete communication embodiments of the above-mentioned vehicle grouping system provided for the embodiment of the present invention.
The schematic flow sheet of a kind of vehicle group technology that Fig. 2 provides for further embodiment of this invention, as shown in Figure 2, this vehicle group technology comprises:
Step 11:SINK node sends broadcast, and broadcast comprises the group mark of SINK node correspondence grouping;
Step 12: car-mounted terminal receives broadcast, judge according to the packet marking that car-mounted terminal stores, if judge that car-mounted terminal does not divide into groups, judge the signal strength signal intensity of broadcast, when the signal strength signal intensity of broadcast is greater than default first signal strength threshold, group mark in stored broadcast message, and packet marking is set to divides into groups;
Step 13: the group that car-mounted terminal and car-mounted terminal store identifies corresponding SINK node and communicates.
Technical scheme in the present embodiment receives the broadcast of SINK node transmission by car-mounted terminal, described broadcast comprises the group mark of described SINK node correspondence grouping, car-mounted terminal completes grouping after judging according to the signal strength signal intensity of current grouping situation and broadcast message, thus realizes the SINK enabling communication between nodes that car-mounted terminal and its place divides into groups.Technical solution of the present invention solves car-mounted terminal and is in mobile status, needs the technical problem obtaining regional information.The implementation procedure of this vehicle group technology is identical with the implementation procedure of vehicle grouping system in above-described embodiment, does not repeat them here.
Preferred as technique scheme, the method also comprises:
If judge that car-mounted terminal divides into groups, car-mounted terminal judges whether the group mark in broadcast is identical with the group mark stored in car-mounted terminal;
If judged result is different, car-mounted terminal judges the signal strength signal intensity of broadcast, when the signal strength signal intensity of broadcast is greater than default secondary signal strength threshold, the group stored mark is replaced with the group mark in broadcast in car-mounted terminal.
Preferred as technique scheme, car-mounted terminal receives broadcast and comprises:
Car-mounted terminal receives the broadcast of SINK node transmission by broadcast reception channel;
The group that car-mounted terminal and car-mounted terminal store identifies corresponding SINK node and carries out communication and comprise:
Car-mounted terminal identifies corresponding SINK node by the group that interactive channel and car-mounted terminal store and communicates;
Wherein, broadcast reception channel is different from the frequency of interactive channel.
Preferred as technique scheme, car-mounted terminal identifies corresponding SINK node by the group that interactive channel and car-mounted terminal store to carry out communication and comprises:
Car-mounted terminal sends information acquisition request by the SINK node of the group mark correspondence that interactive channel stores to car-mounted terminal, and the group that reception car-mounted terminal stores identifies the object information that corresponding SINK node returns according to the address information of car-mounted terminal; Information acquisition request comprises the address information of car-mounted terminal.
Preferred as technique scheme, the address information of car-mounted terminal comprises vehicles identifications.
Technical scheme in the present embodiment receives the broadcast of SINK node transmission by car-mounted terminal, described broadcast comprises the group mark of described SINK node correspondence grouping, car-mounted terminal completes grouping after judging according to the signal strength signal intensity of current grouping situation and broadcast message, thus realizes the SINK enabling communication between nodes that car-mounted terminal and its place divides into groups.Technical solution of the present invention solves car-mounted terminal and is in mobile status, needs the technical problem obtaining regional information.
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 (2)
1. a vehicle group technology, is characterized in that, comprising:
SINK node sends broadcast, and described broadcast comprises the group mark of described SINK node correspondence grouping;
Car-mounted terminal receives described broadcast, judge according to the packet marking that described car-mounted terminal stores, if judge that described car-mounted terminal does not divide into groups, judge the signal strength signal intensity of described broadcast, when the signal strength signal intensity of described broadcast is greater than default first signal strength threshold, store the group mark in described broadcast, and described packet marking is set to divides into groups;
Described car-mounted terminal and the group that described car-mounted terminal stores identify corresponding SINK node and communicate;
If judge that described car-mounted terminal divides into groups, described car-mounted terminal judges whether the group mark in described broadcast is identical with the group mark stored in described car-mounted terminal;
If judged result is different, described car-mounted terminal judges the signal strength signal intensity of described broadcast, when the signal strength signal intensity of described broadcast is greater than default secondary signal strength threshold, the group stored mark is replaced with the group mark in described broadcast in described car-mounted terminal;
Described car-mounted terminal receives described broadcast and comprises:
Described car-mounted terminal receives the described broadcast of described SINK node transmission by broadcast reception channel;
Described car-mounted terminal and the group that described car-mounted terminal stores identify corresponding SINK node and carry out communication and comprise:
Described car-mounted terminal identifies corresponding SINK node by interactive channel and the group that described car-mounted terminal stores and communicates;
Wherein, described broadcast reception channel is different from the frequency of described interactive channel;
Described car-mounted terminal identifies corresponding SINK node by interactive channel and the group that described car-mounted terminal stores to carry out communication and comprises:
Described car-mounted terminal sends information acquisition request by the SINK node of the group mark correspondence that described interactive channel stores to described car-mounted terminal, the object information that the SINK node receiving the group mark correspondence that described car-mounted terminal stores returns according to the address information of described car-mounted terminal; Described information acquisition request comprises the address information of described car-mounted terminal.
2. vehicle group technology according to claim 1, is characterized in that, the address information of described car-mounted terminal comprises vehicles identifications.
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| CN101795292A (en) * | 2010-01-25 | 2010-08-04 | 北京航空航天大学 | Opportunity network architecture based on urban public transport |
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