CN1889750A - Channel distributing method in mixed network - Google Patents
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Abstract
A method for distributing channel in mixed network MN includes sending public control information of mobile self-organized network (SON) by channel preset in cellular network (CN), monitoring the first service channel distribution message in preset channel by terminal in MN and obtaining the second service channel distribution message used for CN communication and down-sent by base station, selecting idle service channel for call in mobile SON and issuing service call request in preset channel by said terminal according to channel occupation information of two said distribution messages, distributing service channel to said terminal by CN for realizing CN mode call with base station.
Description
Technical field
The present invention relates to the method for channel allocation of hybrid network system, the method for channel allocation in the hybrid network system of especially a kind of mobile ad hoc network and Cellular Networks.
Background technology
The network configuration of Cellular Networks is the network configuration commonly used of existing mobile communication system, adopts centralized wireless channel distribution method in the Cellular Networks, promptly needs the such central control equipment of similar base station or service access point.With current GSM and CDMA mobile communication system is example, and radio network controller (BSC/RNC) carries out the management and the distribution of Radio Resource, and to notify terminal by the base station in common down channel be the Traffic Channel of its distribution.
Mobile ad hoc network is the another kind of universal mobile communications mode except that Cellular Networks.Described mobile ad hoc network is the provisional autonomous system of a multi-hop forming of one group of portable terminal that has a wireless transmitter, and this communication system breaks away from network infrastructure and exists, and is a kind of acentric distributed control network.
The terminal of mobile ad hoc network has both router and two kinds of functions of main frame, terminal is during as main frame, and running face is to application program of user, and terminal is during as router, move corresponding Routing Protocol, participate in packet forwarding work and route maintenance work according to routing policy and routing table.In the mobile ad hoc network environment, the radio communication coverage area of each terminal is limited, two can't direct communication terminal carry out data communication by the packet forward of other-end.And mobile ad hoc network terminal transceiver module is symmetrical, and terminal is obtained channel dynamically by distributed algorithm, and then communicates.As shown in Figure 1, terminal 4 and terminal 7 can't direct communications, and terminal 4 can find the path of incoming terminal 7 by the routing algorithm of mobile ad hoc network, and promptly terminal 4 can be communicated by letter with terminal 7 realizations by the forwarding of terminal 5 is final.
In the mobile ad hoc network, a communication process may be to be sent by source terminal, transmit the final purpose terminal that arrives through the relaying of a middle n terminal, with respect to source terminal, just have one to jump adjacent terminal like this, be that source terminal sends the terminal that just can receive, two jump adjacent terminal, and the grouping of source terminal is jumped through one could arrive the adjacent terminal of double bounce after adjacent terminal is transmitted.As shown in Figure 1, the adjacent terminal of one of terminal 4 jumping is terminal 2 and terminal 5.The adjacent terminal of the double bounce of terminal 4 is 1,3,6,7.
In cellular system, introduce the mobile ad hoc network communication mode, can remedy the covering defective, P2P is provided (Peer-to-Peer, point-to-point) pattern, reduce power consumption, the raising capacity, shifting flows finally makes network possess high adaptivity and intelligent to alleviate the hot spot region owing to saturated call congestion that causes of capacity and switching chain rupture.
In the hybrid network of Cellular Networks and mobile ad hoc network pattern formation, comprise mobile ad hoc network communication mode, cellular network communication mode and mixed communication mode.Mixed communication mode is meant the collaborative work that needs mobile ad hoc network communication mode and cellular network communication mode, just can finish whole communication process, promptly passes through the final access base station of multi-hop relay of mobile ad hoc network terminal.In these three kinds of communication modes, preceding dual mode all has been the technology of comparative maturity, and the third communication mode then is a brand-new problem that needs research, does not also have ready-made available solutions to solve this problem at present.
Summary of the invention
The problem to be solved in the present invention provides the method for channel allocation in a kind of mobile ad hoc network and the common hybrid network that constitutes of Cellular Networks, and this method is distributed the channel resource in the hybrid network, makes finally to realize described mixed communication mode.
For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:
1) presets the common control information that the channel of determining in the Cellular Networks is used to send mobile ad hoc network; 2) terminal is used for first traffic channel assignment message that mobile ad hoc network is communicated by letter in the hybrid network in the described channel-monitoring Cellular Networks channel resource that presets; And obtain second traffic channel assignment message that is used for cellular network communication that the base station issues; 3) described terminal is selected idle Traffic Channel to be used for calling out in the mobile ad hoc network, and initiate service call request in the described channel that presets according to the channel occupancy information in described first traffic channel assignment message and second traffic channel assignment message; 4) described terminal realizes the Cellular Networks call by pattern with the base station by Cellular Networks system assignment Traffic Channel.
In the said method, 1) channel of the determining method that is used to send the common control information of mobile ad hoc network is specially: be used to send common control information for mobile ad hoc network presets the channel of dividing based on frequency range; Perhaps, according to the difference of terminal sub-district of living in, channel based on time slot or coding division of each cell allocation is used to send the common control information of mobile ad hoc network.
On the said method basis, 3) also comprise in: the channel that before terminal is initiated the mobile ad hoc network calling, will take by the distributed way decision, and give the base station, and call out the information that will discharge channel after finishing at mobile ad hoc network and report the base station selected reporting channel information.And the base station can judge also whether the channel instructions for use of described terminal to report satisfies the requirement of system parameters, if satisfy, then sends acknowledge message, and this terminal uses this channel to initiate to call out in the mobile ad hoc network.
On the said method basis, 3) selecting idle business channel to take a step forward in comprises: whether described terminal judges call intent terminal is in same sub-district with this terminal, if not, then consults to use the Cellular Networks channel resource of which sub-district to initiate mobile ad hoc network and calls out.
On the said method basis, 3) terminal sends this terminal channel and takies message in the described channel that presets, or this terminal channel of transmission takies the channel occupancy message that message and forwarding listen in the described channel that presets.
In the said method, 2) base station periodically issues described channel assignment message by common down channel in, and perhaps the base station issues described channel assignment message according to the solicited message of terminal.
Above technical scheme as can be seen, in the present invention, mobile ad hoc network and Cellular Networks are shared the channel resource of existing Cellular Networks, thereby do not need to divide Radio Resource for the communication of mobile ad hoc network separately; Simultaneously, for mobile ad hoc network marks off a channel that is used to send common control information in the mobile ad hoc network, make the interior terminal of hybrid network can obtain mobile ad hoc network traffic channel assignment information and Cellular Networks traffic channel assignment information simultaneously like this, and choosing the Traffic Channel free time or reusable according to this information realizes communicating by letter in the mobile ad hoc network, thereby the present invention can make full use of Cellular Networks existing channel resource and carry out mobile ad hoc network communication on the basis that does not influence cellular network communication.On the other hand, technical scheme provided by the present invention can farthest be continued to use existing cellular network communication agreement on the whole, promptly after existing Cellular Networks agreement is carried out less change, can realize the distribution of hybrid network pattern lower channel resource, further can realize the communication under the hybrid network pattern.
Further, in the present invention, be provided with for mobile ad hoc network under the situation of a channel that is used to send common control information, terminal can be obtained the assignment information and the relevant neighbors information of Traffic Channel in the mobile ad hoc network on this channel, and then realizes the distributed allocation of mobile ad hoc network to available Cellular Networks channel.The division methods of this common signal channel of the present invention can further be brought into play the advantage that the hybrid network pattern can have, and can realize that the increase-volume of Cellular Networks sub-district, flow are shifted, the virtual subdistrict expansion, dwindle function such as coverage hole.
On the said method basis, further, the base station judges whether the channel of described terminal to report satisfies the requirement of system parameters, this step will make spatially multiplexing certain channel of mobile ad hoc network communication and cellular network communication, as satisfy the channel multiplexing condition (as with parameters such as signal to noise ratios as basis for estimation) prerequisite under, the channel that mobile ad hoc network can use current cellular network communication using carries out communication in the mobile ad hoc network.This method has improved power system capacity, has saved channel resource.
Description of drawings
Fig. 1 is a communication logic schematic diagram in the mobile ad hoc network;
Fig. 2 is mobile ad hoc network and Cellular Networks relative position schematic diagram;
Fig. 3 is mobile ad hoc network and Cellular Networks relative position schematic diagram;
Fig. 4 is a hybrid network communication pattern schematic diagram;
Fig. 5 is the channel allocation schematic diagram.
Embodiment
The invention provides the channel resource allocation method under the hybrid network pattern that a kind of mobile ad hoc network and Cellular Networks constitute.Its core concept is: at first, determine available resources jointly by cellular network and mobile ad hoc network; Cellular Networks system (radio network controller) is responsible for the distribution of Cellular Networks channel, thereby terminal can be known Cellular Networks channel allocation situation from system; Simultaneously, each terminal in the mobile ad hoc network can be known the situation of adjacent end use channel resource by carrier sense; Therefore, when mobile ad hoc network is in the Cellular Networks coverage, the available channel resources of described hybrid network is the common factor of idle channel in mobile ad hoc network and the Cellular Networks, or, mobile ad hoc network part is outside the Cellular Networks coverage time, and the available channel resources of described hybrid network is the union of idle channel resources in mobile ad hoc network and the Cellular Networks.And then, by cellular network and the common allocation of channel resources may of mobile ad hoc network, with the terminal of base station direct communication by the cellular network allocated channel, the multi-hop communication of terminal room carries out channel allocation with the distributed way of mobile ad hoc network.
Based on above-mentioned core concept, when mobile ad hoc network is shared identical channel resource with the Cellular Networks system, the calling of initiating comprises: the pure honeycomb mode of base station and terminal room is called out, the calling of the pure mobile ad hoc network pattern of the terminal room of mobile ad hoc network inside, and mobile ad hoc network pattern and the collaborative calling of Cellular Networks pattern.Fig. 2, Fig. 3 are mobile ad hoc network and Cellular Networks relative position schematic diagram in the hybrid network.
The mobile ad hoc network communication pattern: as described in the background art, under the mobile ad hoc network call model, the communication process of terminal room is without the base station, but finishes in the mode that multi-hop is transmitted.
The cellular network communication pattern: in base station and communication between terminals process, communicate according to the cellular network communication standard, use the channel resource of Cellular Networks, the basic of distribution RRM agreement of channel resource is carried out.
Described hybrid network communication pattern: under this pattern, terminal will be finished jointly with Cellular Networks by mobile ad hoc network and communicate by letter;
When terminal is not in cellular network coverage, insert Cellular Networks through multi-hop by mobile ad hoc network.As the terminal among Fig. 33, because outside the coverage of Cellular Networks, so when it will communicate with terminal 6, can't directly be undertaken by cellular network, therefore, terminal 3 can be passed through mobile ad hoc network, finds one and it in same mobile ad hoc network and the terminal in the Cellular Networks coverage (terminal shown in the figure 5), through and insert cellular networks by terminal 5 and communicate by letter with terminal 6 realizations.Above-mentioned is one of signal intelligence in the hybrid network.
In above-mentioned communication link, whole link can be divided into two parts: terminal 3 is to terminal 5; Arrive terminal 6 with terminal 5.Wherein, terminal 3 is pure mobile ad hoc network communication pattern to the link of terminal 5, at this moment, terminal 3 should be initiated service request to terminal 4 under the prerequisite that does not influence the Cellular Networks cell communication, and same terminal 4 is in the proper communication that can not influence the Cellular Networks sub-district when terminal 5 is initiated service request.In sum, to realize the communication between two network terminations under the hybrid network pattern, and should not cause the phase mutual interference of terminal room under two kinds of communication patterns.
Is example with terminal 3 among above-mentioned Fig. 3 with the situation shown in terminal 6 is communicated by letter, and the core procedure that the present invention is complete is described.Promptly need finish after the pure mobile ad hoc network communication just in the end a jumper connection earlier and go into the base station, and then the communicating by letter of terminal in realization and the Cellular Networks.1) marks off a common signal channel, be used to send the control grouping in the mobile ad hoc network;
2) node obtains the traffic channel assignment information in the Cellular Networks;
3) base station issues the distribution condition of the Traffic Channel in the Cellular Networks; The content of broadcasting decide as required, can comprise: the situation that the use Traffic Channel of nodes in MANET is communicated by letter in ID number of channel, this sub-district and the adjacent sub-district that use this sub-district and adjacent sub-district, the channel allocation of the distribution of this Zone channel, adjacent sub-district, each sub-district etc.;
The mode that the base station issues the distribution condition of the Traffic Channel in the Cellular Networks comprises: the base station is periodic broadcasting on common down channel; Or the request of base station recovery of node on Traffic Channel;
4) node is intercepted on the Common Control Channel of mobile ad hoc network;
Traffic channel assignment information when obtaining the communication of mobile ad hoc network interior nodes; If the content of base station broadcast comprises the information of mobile ad hoc network then only need intercept neighbor node table;
5) which Traffic Channel node uses carry out transfer of data according to base station information that issues and the information decision that listens to; Selected channel should be idle channel; Perhaps select the channel that sending node does not have other node receiving and receiving node does not have other node to send on every side on every side;
6) node is finished the distribution of channel on the Common Control Channel of mobile ad hoc network; Comprise: whether available selected channel receives sending node inquiry receiving node; Receiving node is confirmed, finishes channel allocation;
7) node is the distribution result informing base station; Its mode comprises: jump informing base station then; Or by certain the node informing base station in the whole link;
8) can the base station use according to the channel of corresponding algorithm decision nodes in MANET selection, if can, then confirm to node; If could not would notify node to reselect channel, repeating step 5), 6), 7), 8);
9) node sends business information on selected channel;
10) node discharges information to the base station reporting channel as required behind sign off, and mode comprises: jump informing base station then; Or by some node informing base stations;
11) information of base station deletion of node busy channel; (if the base station is not broadcasted and is just not needed the informing base station deletion).
12) final jump base station access by terminal;
Promptly last one terminal of jumping in this terminal and the mobile ad hoc network communicates by the communication process of pure mobile ad hoc network; And with the communication process Cellular Networks agreement defined of next jumping (base station).Below, specify the specific implementation of each step around above-mentioned core procedure.
1) in the channel resource of Cellular Networks, marks off a channel as the mobile ad hoc network Common Control Channel, be used to transmit the common control information of mobile ad hoc network, on the mobile ad hoc network Common Control Channel, terminal can send control information, and comprises application, terminal room signaling information and the broadcast message etc. of resource.
When mobile ad hoc network and Cellular Networks use same channel resource, calling terminal need be notified the initiation of answering terminal call, should avoid the influence of mobile ad hoc network calling procedure to the Cellular Networks cell communication in this process as far as possible.Based on above-mentioned consideration, the preferred embodiments of the present invention are: mark off a channel in the channel resource with Cellular Networks as the mobile ad hoc network Common Control Channel.Compare the common control information that uses up Random Access Channel of existing Cellular Networks and common down channel to send calling terminal and answer terminal, this method can avoid causing the conflict of signaling in the existing Cellular Networks Random Access Channel and the waste of resource, and has avoided causing interference to other-end by CBCH.
Further, present embodiment the control channel division methods of preferred mobile ad hoc network two kinds of implementations are arranged:
Mode 1: for mobile ad hoc network presets certain frequency range as Common Control Channel.No matter node is within the coverage of honeycomb or outside the coverage at honeycomb in this method, only need to use unified Common Control Channel, do not need to change channel according to the difference of sub-district of living in.Distribution for Traffic Channel in the hybrid network is a kind of simple relatively way.
Mode 2:, in cell channel, mark off the Common Control Channel of a channel as mobile ad hoc network according to the difference of terminal sub-district of living in.Be time slot or the code channel of base station broadcast mobile ad hoc network that this sub-district is distributed to as Common Control Channel, different districts is used in time slot or the code channel that sends the mobile ad hoc network common control information according to the situation branch of oneself; Also can the whole network be unified in and distribute the time slot determined or definite code channel mobile ad hoc network Common Control Channel in each sub-district as each sub-district.
With reference to Fig. 5, when adopting said method 2, be in the outer terminal of honeycomb and can't learn the common control information that can obtain mobile ad hoc network by that channel, thereby the communication mode shown in scene 1 and the scene 4 can't be realized among Fig. 5; At this moment need to be provided with the channel of an acquiescence for the mobile ad hoc network mode.In order to use the design philosophy of the MAC agreement that the Traffic Channel of honeycomb communicates consistent with mobile ad hoc network, this channel also can be divided into control and Traffic Channel.
With method 2 is that example is analyzed several typical scenes:
Fig. 5 scene 3: the communication node of mobile ad hoc network is in the same sub-district.Node start back search automatically switches to the channel of this sub-district, and uses the Common Control Channel as the mobile ad hoc network distribution in this sub-district.Node is received the channel allocation channel of the Cellular Networks of broadcasting the base station on the one hand on common down channel, intercept on Common Control Channel on the one hand, obtains the channel operating position that neighbors uses the mobile ad hoc network mode to communicate by letter.So just can realize the multi-hop communication in the sub-district described in the present invention.
Fig. 5 scene 2: the communication node of mobile ad hoc network is across a plurality of minizones.The node start is used the Common Control Channel of different districts after search can switch on the channel of different districts.Node is in order to obtain neighbors information, need switch to successively on the Common Control Channel of adjacent sub-district to carry out intercepting in the mobile ad hoc network.Switching can be carried out according to the alternative sub-district that provides of concentrating of node.Node at first will determine to use when the channel of selecting mobile ad hoc network communication to use and receive node place cell channel like this, so still send out the node cell channel.Also just equaling node switches between different districts.Need two nodes to switch in the scene 2.If in scene 5, during the final jump access base station, node also will guarantee not influence and the existing proper communication in base station when switching.
Fig. 5 scene 1: the communication node of mobile ad hoc network is outside honeycomb covers.Node start back search switches on the working frequency range of acquiescence less than signal of base station.Node only needs to intercept the channel operating position of neighbors on the acquiescence working frequency range like this, and finishes communication on this frequency range.Whole process does not relate to Cellular Networks.
Fig. 5 scene 4: the communication node of mobile ad hoc network partly is in outside the honeycomb covering, and part is in the honeycomb covering.Have part after the node start and switch on the channel of sub-district, part is on default channel.If communication is the node initiation the sub-district outside, then this node does not have alternative collection, can't find neighbors on the control corresponding channel, at this moment can all cell channels all as alternative collection, switched successively, intercepted; Require the node cycle on default channel in the sub-district to send HELLO, be used for neighbors and find.Initiate if communication is the node in the sub-district, then after alternative concentrated intercepting, also need to forward to intercept on the default channel and could find neighbors.Like this, node can determine to finish communication or finish communication with default channel with the Traffic Channel of sub-district.
Based on above-mentioned analysis, the channel distribution method of aforesaid way 2 is mobile ad hoc network configuration Common Control Channel in each sub-district, and is that the node in honeycomb is not provided with default channel cycle transmission HELLO on default channel simultaneously.Node is intercepted respectively for the informational needs that listens to neighbors switches on the channel of alternative collection sub-district and the default channel like this.Especially for realize in the hybrid network virtual subdistrict expansion (Fig. 5 scene 4), dwindle blind area functions such as (Fig. 5 scenes 1), make channel allocation mechanism comparatively complicated, and difficult point concentrates on how switching of node on the Common Control Channel of alternative collection.Thereby in the present embodiment channel distribution method of optimal way 1 to realize the transmission of mobile ad hoc network common control information.
2) channel allocation information of base station broadcast Cellular Networks shows Cellular Networks channel allocation situation.
Described channel allocation situation can be by table 1 signal.
Table 1:
| Sub-district ID Traffic Channel | This cell channel | Adjacent sub-district 1 channel | Adjacent sub-district 2 channels | | | | |
| Traffic Channel 1 | 3 at | 5 at terminal | |||||
| Traffic Channel .. | The base station is to 5 at terminal | The base station is to 9 at terminal | |||||
| Traffic Channel n | The base station is to 7 at terminal | The base station is to 19 at terminal |
Last table only illustrates the content of described channel allocation information, does not get rid of other list structures.
Table in the reference, to a sub-district, broadcasted content can comprise the channel allocation situation of this sub-district and a plurality of sub-districts adjacent with this sub-district, as above shows illustrated embodiment, this sub-district issues the channel allocation information of this sub-district and adjacent 6 sub-districts.And, should comprise following content in the data structure of following photos and sending messages:
Cell ID (ID number);
The channel of sub-district; Can show employed frequency of this cell channel or code word, and then the mobile ad hoc network terminal of striding cell communication is known when next jumps terminal communication with the frequency that uses;
Dedicated Traffic Channel in the sub-district;
Shared Traffic Channel when the terminal of determining communicates.
And also can further comprise following content in the described channel allocation information that issues:
Whether the terminal of determining receives the base station down signal; This information will be convenient to realize the resource reuse of mobile ad hoc network communication and cellular network communication, and even certain Traffic Channel is up taking, and then might use this channel resource to carry out mobile ad hoc network communication in the terminal of this terminal surrounding; If certain Traffic Channel is issued base station information by descending taking, then can not be when realizing mobile ad hoc network communication multiplexing this channel resource;
Whether the terminal of determining communicates by letter for the mobile ad hoc network mode; If certain channel only is used for the communication of mobile ad hoc network mode, then in other mobile ad hoc network communication, can not consider influence during multiplexing this channel resource to cellular network communication.
The base station issues above-mentioned channel allocation information can be by two kinds of send modes: issue above-mentioned channel allocation information by common down channel broadcasting, the transmission of this forms of broadcasting is periodic, and the time of each Cell Broadcast CB is identical; Perhaps, after the request of receiving terminal, the base station sends to this terminal by certain special-purpose Traffic Channel.
3) terminal is monitored traffic channel assignment information in the mobile ad hoc network of adjacent terminal transmission on the mobile ad hoc network Common Control Channel in the mobile ad hoc network.
Use tabulation with reference to following mobile ad hoc network Traffic Channel, illustrate the channel allocation information content on the described mobile ad hoc network Common Control Channel; This table is to divide time slot for the synchronous terminal in the hybrid network, and the asynchronous terminal outer for hybrid network is not distinguish time slot.Following table is expressed the channel behaviour in service, and the adjacent terminal situation of this terminal.
Table 2:
| Dedicated Traffic Channel number adjacent terminal list | Channel 1 | Channel 2 | Channel ... | Channel n |
| This terminal | Send out (sub-district 1) | |||
| Terminal 2 | Receive (sub-district 1) | Receive (sub-district 3) | ||
| | Send out (sub-district 2) | |||
| Terminal 7 | Receive (sub-district 4) |
Last table only illustrates the content of described channel allocation information, does not get rid of other list structures.
Table in the reference should comprise following content in the data structure of photos and sending messages under the mobile ad hoc network Common Control Channel:
This terminal iidentification (ID);
The dedicated channel that this terminal communication takies; Certain channel of certain sub-district;
This terminal takies the state of dedicated channel; As take this channel receiving information and receive or transmission information, the duration of busy channel etc.;
Adjacent terminal iidentification (ID); The number that comprises the adjacent terminal of volume in the tabulation depends on terminal density;
The dedicated channel that adjacent terminal communication takies; Certain channel of certain sub-district;
Adjacent terminal takies the state of dedicated channel; As take this channel receiving information and receive or transmission information, the duration of busy channel etc.
Remove the above-mentioned information content, the present invention does not get rid of the mobile ad hoc network terminal and transmits the information that comprises other guide by Common Control Channel.
The information content is carried in the control grouping of mobile ad hoc network communication use in the above-mentioned tabulation, also is kept in the terminal simultaneously.The content that is carried at the information in the control grouping can be the channel operating position of this terminal, also can comprise the channel operating position of adjacent terminal.
4), need to initiate mobile ad hoc network mode nodes in communication and can search and calculate own available channel resource by above-mentioned two tables; On the other hand, which channel the base station also can calculate and not reach the operation parameter requirement by searching this table, and then realizes common channel resource management with mobile ad hoc network.Above the following foundation the structures of two tables, the specific embodiment of channel resource allocation in the hybrid network is provided.The terminal of carrying out mobile ad hoc network communication comprises the terminal of calling, transmits terminal and call intent terminal, wherein transmit terminal simultaneously as receiving terminal and transmission terminal, and the terminal of calling out in a mobile ad hoc network communication process is always the transmission terminal, and the call intent terminal is always answers terminal.
The mobile ad hoc network terminal that 41) will make a call search own next jump terminal whether in table 1;
42) if first row of described next jumping terminal in table 1 illustrate that then two terminals are in a sub-district; And then search the purpose terminal of this time calling out can on which channel, answer (promptly current being not used in of this channel carried out cellular communication, also is not used in the communication of carrying out mobile ad hoc network);
43) the terminal selection can be used for making a call, and (promptly current being not used in of this channel carried out cellular communication to channel, also be not used in the communication of carrying out mobile ad hoc network), step 42) with 43) union of the available channel that obtained is exactly that terminal room realizes communicating by letter available channel set, and terminal will be selected the channel that is used to make a call in this set;
44) if next that first row do not have a calling terminal in the table 1 jumped terminal, further search other several row, then the calling in this mobile ad hoc network this moment may be to stride cell communication, therefore need judge that the minizone is with frequency or alien frequencies according to the used channel in each sub-district in the table 1, if with frequently, the terminal that then is used for carrying out mobile ad hoc network communication in each sub-district need be unified communication (the present invention is an example with the implementation in the 3G system, but does not get rid of the realization of the present invention in the 2G system) to the scrambler; If the minizone alien frequencies, the terminal that then is used to carry out mobile ad hoc network communication in each sub-district should be unified a frequency, promptly needs to carry out the switching of frequency;
In the present embodiment, suppose that each terminal is all used the resource of sub-district, calling terminal place, is promptly reported to this cell base station by calling terminal when each terminal occurring and be in the situation of different districts, need not be and answer terminal to the report of place cell base station, because do not use the channel of receiving the sub-district;
45) according to the set (receive the time slot of node communication if time slot will stagger, comprise honeycomb mode and mobile ad hoc network pattern) of answering the operable channel of terminal, calling terminal is determined the employed channel of communication;
46) searched table 1 after, calling terminal is look-up table 2 again, the adjacent terminal that can determine the purpose terminal of calling out according to the record in the table 2 does not send professional channel, and the adjacent terminal of calling terminal do not receive professional channel, like this with table 1 in the result that checks in get the channel resource that can use when common factor just can determine that finally calling terminal is communicated by letter with the purpose terminal room;
47) if the record of call intent terminal in the table 2, then calling terminal is directly according to oneself channel operating position selective channel, and sends call request on control channel.
Two tables that relate in the above-mentioned example are two data structures, safeguard the channel that hybrid network can be used according to the content final decision in these two tables, yet the present invention and do not lie in and limit concrete tabling look-up or account form in terminal.
On the basis of the foregoing description, when mobile ad hoc network communication will be with spatially multiplexing certain channel of Cellular Networks, terminal should be given the base station with this reporting channel information, the base station judges whether this channel satisfies the messaging parameter requirement, to determine whether to use this channel to carry out mobile ad hoc network communication, when this channel satisfied communicating requirement, then base station notice mobile ad hoc network terminal was used this channel, otherwise the mobile ad hoc network terminal should be reselected communication channel.And above-mentioned parameter comprises the signal to noise ratio of channel.In the present embodiment, when channel that mobile ad hoc network distributed is not during with the Cellular Networks channel resource reusing, terminal can be without the judgement of base station and is directly used this channel, does not make the base station do the situation of respective record and also do not get rid of the channel information that terminal to report takies among the present invention.
Above-mentionedly be the management method of channel resource of the present invention, below explanation is according to the traffic channel assignments situation of above-mentioned management method.
With the 3G network is example, described channel comes down to divide based on time slot and code channel, if with the time slot is unit, then mobile ad hoc network can use some or several time slots in the frame as Common Control Channel, if with the code channel is unit, then can use one or several code channel as the mobile ad hoc network Common Control Channel.Do not distinguish the notion of time slot and code channel in the following description particularly, the unified channel that is summarised as.
With reference to Fig. 5, if a frame is 10ms, wherein channel 1 is the common control information that is used to send mobile ad hoc network of the present invention, difference according to the factors such as dissimilar and quality of service requirement of business, channel 3 and channel 6 Traffic Channels were used to transmit the traffic packets in the mobile ad hoc network shown in division was published picture again, and all the other channels are used for cellular communication.As indicated above, the resource reuse of permission honeycomb and mobile ad hoc network among the present invention, promptly under the situation that satisfies the system communication parameter request, the channel 3 shown in the figure also can be used for communicating by letter of Cellular Networks simultaneously with channel 6.
In addition, the distribution of channel also can be adopted the method for dynamic assignment, promptly be different from the Traffic Channel that above-mentioned special division channel 3 and channel 6 are communicated by letter as mobile ad hoc network, and all channel resource dynamic assignment can be used for mobile ad hoc network communication or cellular network communication, then under this situation, in management method mentioned above, terminal should report the base station with each mobile ad hoc network channel allocation result, and register the base station, with can the reasonable distribution channel resource when carrying out cellular network communication, avoid causing the channel occupancy conflict.
Below further specify the process of method for channel allocation of the present invention.
1) terminal 1 that will initiate communication is learnt the above situation of table 1 earlier by intercepting the common down channel of base station; Here can be the base station periodic broadcasting, also can be 1 request of terminal by the base station on Traffic Channel specially to terminal 1 transmission table 1 information;
2) terminal 1 is jumped the communication of neighbors by intercepting oneself on the Common Control Channel of mobile ad hoc network, and learn the situation of table 2: terminal is on duty or communication on common down channel, and is all on duty At All Other Times on the Common Control Channel of mobile ad hoc network; Terminal does not need to intercept and acquisition table 2 information specially, for new start or just moved into this regional terminal be could acquisition after need intercepting table 2 information;
3) message on the Common Control Channel that listens to of terminal 1 has short bursty data, being used for control mutual or that safeguard the business set up divides into groups, for the business that adopts handshake mechanism, which letter letter sends terminal and receiving terminal will consult in the control grouping with, holding time, and then just carve formation table 2, further, when mobile ad hoc network adopts power control, also carve the performance number that comprises that plan adopts in the table 2;
4) after terminal 1 combined all above message, which channel can draw and oneself jump the available channel resource of terminal (terminal 2 among the figure) with next was, but comprises idle channel and the multiplexing channel in implementation space;
5) the terminal 1 resource operating position that need calculate according to oneself is selected available Traffic Channel;
6) terminal 1 is initiated service request to terminal 2 on the Common Control Channel of reserving, and carries out the coordination of resource and uses, if terminal 2 is agreed the selection of terminals 1 then reply affirmation that otherwise notice terminal 1 is more selected channel;
7) terminal 2 is identical with the process of terminal 3, and the allocation result of mobile ad hoc network is wanted informing network (base station), if there is power control also employed power will be described;
The mode of mobile ad hoc network channel allocation result notification network can be to finish the back by source terminal or by purpose terminal informing network together in the whole piece link assignment;
Terminal obviously needs each terminal to report the channel allocation structure relevant with this sub-district to sub-district, place separately not when same sub-district; Perhaps, also can by each jumping send out terminal informing base station respectively, as by terminal 1 informing base station its with terminal 2 signal posts use channel, its employed channel of communicating by letter with terminal 3 by terminal 2 informing base stations;
8) if agree that terminal can take the channel that reports and carry out mobile ad hoc network communication, then terminal is in the predetermined enterprising industry affair of Traffic Channel transmission packets after calculating for network; Otherwise terminal is restarted selective channel.
9) behind the mobile ad hoc network sign off, the mobile ad hoc network terminal discharges channel resource; And, if in network, write down the mobile ad hoc network channel occupancy information, after then described mobile ad hoc network terminal discharges channel resource, also should be the information of release informing network, network upgrades the resource of oneself and uses tabulation.
Above-mentioned steps can be summarized as 5 processes: distribution service channel on the inherent Common Control Channel of mobile ad hoc network; The result of notice Cellular Networks mobile ad hoc network distribution service channel (can be that node 1 and node 2 are distinguished reporting base stations, also can unify reporting base station by node 1 as shown in the figure); In Traffic Channel transmitting data business; Discharge channel in the mobile ad hoc network; The release of notice Cellular Networks Traffic Channel (can be to discharge channel by node 1 unified informing base station after discharging whole link, also can be every hop node informing base station respectively).
More than the method for channel allocation in a kind of hybrid network provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of method for channel allocation of hybrid network system is used for realizing it is characterized in that the channel allocation of the hybrid network that mobile ad hoc network and Cellular Networks constitute:
1) presets the common control information that the channel of determining in the Cellular Networks is used to send mobile ad hoc network;
2) terminal is used for first traffic channel assignment message that mobile ad hoc network is communicated by letter in the hybrid network in the described channel-monitoring Cellular Networks channel resource that presets; And obtain second traffic channel assignment message that is used for cellular network communication that the base station issues;
3) described terminal is selected idle Traffic Channel to be used for calling out in the mobile ad hoc network, and initiate service call request in the described channel that presets according to the channel occupancy information in described first traffic channel assignment message and second traffic channel assignment message;
4) described terminal realizes the Cellular Networks call by pattern with the base station by Cellular Networks system assignment Traffic Channel.
2, the method for channel allocation of mobile network system as claimed in claim 1 is characterized in that: 1) be specially:
For presetting the channel of dividing based on frequency range, mobile ad hoc network is used to send common control information.
3, require the method for channel allocation of 1 described mobile network system as power, it is characterized in that:
1) be specially difference according to terminal sub-district of living in, the channel that one of each cell allocation is divided based on time slot or coding is used to send the common control information of mobile ad hoc network.
4, the method for channel allocation of mobile network system as claimed in claim 1 is characterized in that:
3) initiate the channel that will take by the distributed way decision before mobile ad hoc network is called out in terminal in, and give the base station, and the information that will discharge channel after the mobile ad hoc network calling is finished reports the base station selected reporting channel information.
5, further comprise the method for channel allocation of mobile network system as claimed in claim 4 is characterized in that, 3):
The base station judges whether the channel instructions for use of described terminal to report satisfies the requirement of system parameters, if satisfy, then sends acknowledge message, and this terminal uses this channel to initiate to call out in the mobile ad hoc network.
6, the method for channel allocation of mobile network system as claimed in claim 1 is characterized in that:
3) selecting idle business channel to take a step forward in comprises: whether described terminal judges call intent terminal is in same sub-district with this terminal, if not, then consults to use the Cellular Networks channel resource initiation mobile ad hoc network of which sub-district to call out.
7, as the method for channel allocation of each described mobile network system of claim 1 to 6, it is characterized in that:
3) comprise further in that terminal sends this terminal channel and takies message in the described channel that presets, or, in the described channel that presets, send this terminal channel and take the channel occupancy message that message and forwarding listen to.
8, as the method for channel allocation of each described mobile network system of claim 1 to 6, it is characterized in that:
2) base station periodically issues described channel assignment message by common down channel in.
9, as the method for channel allocation of each described mobile network system of claim 1 to 6, it is characterized in that:
2) base station issues described channel assignment message according to the solicited message of terminal in.
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